The invention relates to a control valve having at least one switchable control edge, comprising: • a main control piston (4), which is linearly movable in a valve body (1), wherein the main control piston (4) has an axial bore (50) and is designed to provide at least two switching states by way of a linear movement, • a secondary control piston (5), which is coaxially arranged in the axial bore (50) of the main control piston (4) and is designed to switch at least one control edge of the main control piston (4), wherein the axial bore (50) of the main control piston (4) is closed by a closure screw (16), • an actuating piston (9), which is arranged in the closure screw (16) and is designed to move the secondary control piston (5), • a switching valve (19), which is hydraulically connected to the actuating piston (9) and is designed to hydraulically actuate the actuating piston (9), wherein the main control piston (4) has at least one longitudinal groove which forms at least part of the hydraulic connection between the switching valve (19) and the actuating piston (9).
F16K 11/07 - Multiple-way valves, e.g. mixing valvesPipe fittings incorporating such valvesArrangement of valves and flow lines specially adapted for mixing fluid with all movable sealing faces moving as one unit comprising only sliding valves with linearly sliding closure members with cylindrical slides
F16K 31/122 - Operating meansReleasing devices actuated by fluid the fluid acting on a piston
F15B 13/04 - Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
The invention relates to a control valve having a switchable control edge, and comprising a valve body (1) having a first control slide (400) and at least two control terminals (501; 502; 503; 504; 505) and at least one control edge (6; 44; 45), wherein the first control slide (400) has an axial bore (40) and a second control slide (41) is formed in the axial bore (40); and further comprising an end cap (57) having an actuating piston (48), wherein the actuating piston (48) is designed to engage in the axial bore (40), and the actuating piston (48) is designed to move the second control slide (41) in the axial bore (40).
F15B 13/04 - Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
B29C 45/00 - Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mouldApparatus therefor
F15B 20/00 - Safety arrangements for fluid actuator systemsApplications of safety devices in fluid actuator systemsEmergency measures for fluid actuator systems
3.
Axial piston machine having a seal ring which is spherical in sections
The invention relates to an axial piston machine in which pistons carry out a stroke movement in cylinders and in which the pistons have a seal ring receptacle for a seal ring. In order to improve robustness, wear resistance, friction and stick-slip behavior, according to the invention, the seal ring is spherical, wherein the curvature radius of the seal ring, which is spherical in regions, substantially corresponds to half the diameter of the cylinder inner wall.
The present invention relates to a method for determining a present state of wear of a hydrostatic machine during the operation of the hydrostatic machine. The hydrostatic machine comprises a drive with variable rotational speed and a hydrostatic pump, wherein the drive is designed to drive the hydrostatic pump for generating a volume flow of a fluid, and wherein the hydrostatic machine is connected to a fluid transport channel in which the fluid is transported in a manner driven by the hydrostatic machine. The method has a step for determining a first torque of the drive at a specified drive vector. Furthermore, the method has a step for ascertaining a second torque of the drive at the specified drive vector using a first calculation method, and in addition, the method has a step for determining the present state of wear of the hydrostatic machine using a second calculation method, in order to compare the first determined torque and the second ascertained torque to one another.
The present invention relates to an electrohydrostatic system having a hydraulic cylinder comprising a first cylinder chamber and a second cylinder chamber. Furthermore, the electrohydrostatic system has a fluid hydraulic supply device for providing a hydraulic fluid, a fluid hydraulic motor pump unit, designed to provide a fluid hydraulic volume flow in order to move the hydraulic cylinder. A motor control device is designed to provide a rated current for an electrical drive of the fluid hydraulic motor pump unit. Moreover, the electrohydrostatic system has at least one fluid hydraulic safety valve, which on a first valve side is connected to one of the cylinder chambers of the hydraulic cylinder and on a second valve side is connected to the fluid hydraulic motor pump unit. The fluid hydraulic safety valve can be bridged via a bypass connection with a fixed orifice plate, wherein the bypass connection is connected to the first valve side and to the second valve side of the at least one fluid hydraulic safety valve. Moreover, the electrohydrostatic system has a pressure sensor that is connected to one of the cylinder chambers of the hydraulic cylinder. The pressure sensor is designed to detect a fluid hydraulic pressure on one of the cylinder chambers and, according to the detected fluid hydraulic pressure, to provide an enabling signal for the motor control device to provide the rated current for the electrical drive of the fluid hydraulic motor pump unit.
B30B 15/20 - Control arrangements for fluid-driven presses controlling the reciprocating motion of the ram controlling the speed of the ram, e.g. the speed of the approach, pressing or return strokes
B30B 15/28 - Arrangements for preventing distortion of, or damage to, presses or parts thereof
F15B 15/18 - Combined units comprising both motor and pump
F15B 13/02 - Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
F15B 20/00 - Safety arrangements for fluid actuator systemsApplications of safety devices in fluid actuator systemsEmergency measures for fluid actuator systems
An electro-hydrostatic actuation system and a method for driving a hydraulic actuator, e.g. a hydraulic cylinder, are described, wherein the system comprising a leakage branch, and wherein preferably an additional pump is arranged. The system further comprises a source for providing hydraulic liquid; a high-pressure circuit to direct the hydraulic liquid to a hydraulic actuator, such as e.g. a hydraulic cylinder; a low-pressure circuit having several branches; a main pump for hydraulic liquid arranged in the high-pressure circuit, comprising a housing having a high-pressure section and a low-pressure section, separated by gap sealings, wherein the high-pressure section comprises a first outlet and a second outlet to provide the hydraulic liquid flow in the high-pressure circuit; and wherein the low- pressure section comprises a leakage outlet; an electric motor driving the main pump.
In summary, the invention relates to a device and method for open-loop or closed-loop control of a movement of a die cushion of a die cushion press. The device has a control value encoder (11), a speed controller (12), a current controller (13), and a motor control device (14) for providing a nominal current for an electrical drive (15) of a fluid-hydraulic motor pump unit (20) for moving a die cushion of a die cushion press. The control value encoder (11) is provided in order to calculate a setpoint speed based on a die cushion control value command and a die cushion information. The speed controller (12) calculates a setpoint current based on the setpoint speed. The current controller (13) calculates a control signal based on the setpoint current, and the motor control device (14) calculates the nominal current based on the control current. In this respect, the dynamics of the control of the electrical machine can be improved.
B21D 24/14 - Devices controlling or operating blank holders independently, or in conjunction with dies pneumatically or hydraulically
G05B 19/18 - Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
H02P 23/00 - Arrangements or methods for the control of AC motors characterised by a control method other than vector control
The hydraulic system according to the invention comprises a hydraulic circuit with a low-pressure region and a high-pressure region; a volume- and/or speed-variable hydraulic machine, which is driven by a first electric motor and has an inlet and an outlet and provides a volume flow of a hydraulic fluid in the high-pressure region of the hydraulic circuit. The hydraulic system according to the invention further comprises at least one movable shaft, which is arranged in the high-pressure region of the hydraulic circuit; at least one valve, which separates the high-pressure region from the low-pressure region; and at least one hydraulic fluid container, which is hydraulically connected to the low-pressure region of the hydraulic circuit. The hydraulic system according to the invention also has a discharge line, which discharges hydraulic fluid from the leakage of the hydraulic machine, and a cooling line for transporting the hydraulic fluid in order to cool the electric motor, the discharge line and the cooling line being fluidically connected to at least one of the hydraulic fluid containers.
The hydraulic system according to the invention is a hydraulic system for controlling a stabilizer drive, in particular for controlling an angle of attack and/or a pivoting out and in of a stabilizer wing, preferably for ships. The hydraulic system according to the invention has a rotary vane motor that changes the angle of attack of the stabilizer wing and/or a hydraulic cylinder for pivoting the stabilizer wing out and in, along with a first hydraulic circuit. The first hydraulic circuit furthermore comprises a low-pressure circuit and a high-pressure circuit, a device for providing an admission pressure of the low-pressure circuit, and two anti-cavitation valves which separate the first low-pressure circuit from the first high-pressure circuit. The hydraulic system according to the invention is furthermore characterized in that a first hydraulic pump driven by an electric motor and having two connections is integrated in the high-pressure circuit.
B63B 39/06 - Equipment to decrease pitch, roll, or like unwanted vessel movementsApparatus for indicating vessel attitude to decrease vessel movements by using foils acting on ambient water
F15B 11/16 - Servomotor systems without provision for follow-up action with two or more servomotors
The electrohydrostatic actuator system according to the invention comprises a volume-variable and/or rotational-speed-variable hydro machine, which is driven by an electric motor, for providing a volume flow of a hydraulic fluid, and a main shaft which is movable by the hydraulic fluid and which has at least one first chamber, wherein the first chamber, with at least one first main hydraulic line and a first main valve, is hydraulically connected to the hydro machine via a connection line. The actuator system according to the invention further comprises a secondary shaft which is movable by the hydraulic fluid and which has at least one first chamber, wherein the first chamber, with at least one first secondary hydraulic line and a first secondary valve, is hydraulically connected to the hydro machine via a connection line. Furthermore, according to the invention, a hydraulic accumulator is hydraulically connected to the first secondary hydraulic line in the area between the first chamber of the secondary shaft and the first secondary valve.
F15B 11/16 - Servomotor systems without provision for follow-up action with two or more servomotors
F15B 1/02 - Installations or systems with accumulators
F15B 11/20 - Servomotor systems without provision for follow-up action with two or more servomotors controlling several interacting or sequentially-operating members
B21D 24/14 - Devices controlling or operating blank holders independently, or in conjunction with dies pneumatically or hydraulically
F15B 11/22 - Synchronisation of the movement of two or more servomotors
11.
AXIAL PISTON MACHINE HAVING A SEAL RING WHICH IS SPHERICAL IN SECTIONS
The invention relates to an axial piston machine in which pistons carry out a stroke movement in cylinders and in which the pistons have a seal ring receptacle for a seal ring. In order to improve robustness, wear resistance, friction and stick-slip behavior, according to the invention, the seal ring is spherical, wherein the curvature radius of the seal ring, which is spherical in regions, substantially corresponds to half the diameter of the cylinder inner wall.
The present invention relates to a method for determining a present state of wear of a hydrostatic machine during the operation of the hydrostatic machine. The hydrostatic machine comprises a drive with variable rotational speed and comprises a hydrostatic pump, wherein the drive is designed to drive the hydrostatic pump in order to generate a volume flow of a fluid, and wherein the hydrostatic machine is connected to a fluid transport channel in which the fluid is transported in a manner driven by the hydrostatic machine. The method has a step for determining a first torque of the drive in the case of a specified drive vector. Furthermore, the method has a step for ascertaining a second torque of the drive in the case of the specified drive vector using a first calculation method, and furthermore, the method has a step for determining the present state of wear of the hydrostatic machine using a second calculation method in order to correlate the first determined torque with the second ascertained torque.
An electrohydrostatic actuator system comprising: a volume- and/or speed-variable hydraulic machine which is driven by an electric motor, for providing a volumetric flow of a hydraulic fluid; a differential cylinder with a piston side and a ring side; and at least one pretensioning source. The actuator system has a closed hydraulic circuit, wherein, during operation, the hydraulic fluid in the hydraulic circuit is pressurized by means of the hydraulic machine and/or the pretensioning source. Furthermore, according to the invention, the differential cylinder provides a power motion operating mode and a rapid motion operating mode. In order to balance a volume of the hydraulic fluid in the closed hydraulic circuit, according to the invention an expansion reservoir is connected to the piston side of the differential cylinder via a valve.
An electro-hydrostatic drive for realizing a rapid movement and a force-building movement, comprising a hydro-machine with variable volume and/or rotational speed, driven by an electric motor, for providing a volume-flow of a hydraulic fluid, a first cylinder with a housing, a piston, a cylinder rod, and a first and a second cylinder chamber, a second cylinder with a piston, a cylinder rod, and a first and a second cylinder chamber, a moveable carrier plate, a pillar, and a clamping apparatus to clamp and/or unclamp the first cylinder to the pillar, where the hydraulic drive has a closed hydraulic circuit, which has, when run, a positive pressure above atmospheric pressure and which, by utilizing the hydro-machine, can pressurize either the first or the second cylinder chamber of the first cylinder and/or the first or the second cylinder chamber of the second cylinder. The moveable carrier plate is connected both to the first cylinder and to the second cylinder. For the force-building movement, the first cylinder is clamped, by the clamping apparatus, to the pillar and one cylinder chamber of the first cylinder is pressurized with the hydraulic fluid, and for the rapid movement, the first cylinder is unclamped, by the clamping apparatus, from the pillar and one cylinder chamber of the second cylinder is pressurized with the hydraulic fluid.
B30B 15/16 - Control arrangements for fluid-driven presses
B29C 45/67 - Mould opening, closing or clamping devices hydraulic
B30B 1/32 - Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by plungers under fluid pressure
The present invention relates to an electrohydrostatic system having a hydraulic cylinder comprising a first cylinder chamber and a second cylinder chamber. Furthermore, the electrohydrostatic system has a fluid hydraulic supply device for providing a hydraulic fluid, a fluid hydraulic motor pump unit designed to provide a fluid hydraulic volume flow in order to move the hydraulic cylinder. A motor control device is designed to provide a rated current for an electrical drive of the fluid hydraulic motor pump unit. Moreover, the electrohydrostatic system has at least one fluid hydraulic safety valve, which on a first valve side is connected to one of the cylinder chambers of the hydraulic cylinder and on a second valve side is connected to the fluid hydraulic motor pump unit. The fluid hydraulic safety valve can be bridged via a bypass connection with a fixed orifice plate, the bypass connection being connected to the first valve side and to the second valve side of the at least one fluid hydraulic safety valve. Moreover, the electrohydrostatic system has a pressure sensor which is connected to one of the cylinder chambers of the hydraulic cylinder. The pressure sensor is designed to detect a fluid hydraulic pressure on one of the cylinder chambers and, according to the detected fluid hydraulic pressure, to provide an enabling signal for the motor control device to provide the rated current for the electrical drive of the fluid hydraulic motor pump unit.
B30B 15/20 - Control arrangements for fluid-driven presses controlling the reciprocating motion of the ram controlling the speed of the ram, e.g. the speed of the approach, pressing or return strokes
B30B 15/28 - Arrangements for preventing distortion of, or damage to, presses or parts thereof
F15B 11/00 - Servomotor systems without provision for follow-up action
F15B 13/01 - Locking-valves or other detent devices
17.
Extrusion press with electro-hydrostatic control system
The present invention relates to an extrusion press (10, 20, 30) with a press cylinder (111), the press cylinder (111) being driven with an electro-hydrostatic control system (104) for a power transmission and being connected to a separate drive (120, 400) for rapid traverse, with a container (115), wherein the container (115) is connected to a hydraulic cylinder (117) for a power transmission and to a further separate drive (119, 300) for rapid traverse, with a hydraulic cylinder (101) with a locking device (103) for driving a shearing tool (102), wherein the hydraulic cylinder (101) is connected to the electro-hydrostatic control system (104), and wherein the press cylinder (111) in the power transmission and the hydraulic cylinder (101) for driving a shearing tool (102) are controlled alternately via the common electro-hydrostatic control system (104).
B30B 1/32 - Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by plungers under fluid pressure
B30B 15/16 - Control arrangements for fluid-driven presses
B30B 9/32 - Presses specially adapted for particular purposes for consolidating scrap metal or for compacting used cars
B29C 48/00 - Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired formApparatus therefor
An electro-hydrostatic actuator system for a press drive, having an upper piston with a press surface, which acts from a first direction, wherein the press surface of the upper piston is actuated by means of a piston rod in a hydraulic cylinder of the upper piston and traverses a first distance in a press run, and a first electro-hydrostatic actuator for driving the upper piston, comprising a first pump and a first motor generators which is controlled by a first controller. The system furthermore comprises at least one auxiliary piston with a press surface, which acts from a second direction opposite the first direction, wherein the press surface of the auxiliary piston is actuated by means of a piston rod in a hydraulic cylinder of the auxiliary piston and traverses a second distance in the press run, and a second electro-hydrostatic actuator for driving the at least one auxiliary piston, comprising a second pump and a second motor generator which is controlled by a second controller. The second motor generator is operated as a generator in the press run, thereby generating energy which is provided to the first motor generator or auxiliary piston, which are operated as motors, via the common DC bus.
An electro-hydrostatic actuation system and a method for driving a hydraulic actuator, e.g. a hydraulic cylinder, are described, wherein the system comprising a leakage branch, and wherein preferably an additional pump is arranged. The system further comprises a source for providing hydraulic liquid; a high-pressure circuit to direct the hydraulic liquid to a hydraulic actuator, such as e.g. a hydraulic cylinder; a low-pressure circuit having several branches; a main pump for hydraulic liquid arranged in the high-pressure circuit, comprising a housing having a high-pressure section and a low-pressure section, separated by gap sealings, wherein the high-pressure section comprises a first outlet and a second outlet to provide the hydraulic liquid flow in the high-pressure circuit; and wherein the low- pressure section comprises a leakage outlet; an electric motor driving the main pump.
An electro-hydrostatic actuating drive has a variable-volume and/or variable-speed hydraulic machine, which is driven by an electric motor, for the provision of a volumetric flow of a hydraulic fluid. Furthermore, the actuating drive comprises a cylinder with a piston, a piston rod and a first piston chamber, a valve with a first position and a second position, which valve can be moved by a first hydraulic actuator into the first position and by a second hydraulic actuator into the second position, wherein the second position controls a greater volumetric flow of the hydraulic fluid than the first position, a sink, a main line which connects a first piston chamber of the cylinder to the sink and in which the hydraulic machine is arranged, an auxiliary line which connects the first piston chamber to the sink and in which the valve is arranged, a first control line to the first hydraulic actuator, and a second control line to the second hydraulic actuator. A hydraulic resistor is arranged in the main line in series with the hydraulic machine, the first control line is connected to the main line, and the second control line is connected between the hydraulic resistor and the first piston chamber.
F01D 17/26 - Devices dealing with sensing elements or final actuators or transmitting means between them, e.g. power-assisted the operation or power assistance being predominantly non-mechanical fluid, e.g. hydraulic
F15B 11/08 - Servomotor systems without provision for follow-up action with only one servomotor
The invention relates to a device and a method for open-open or closed-loop control of a movement of a die cushion of a die cushion press. The device has an control value encoder (11), a speed controller (12), a current controller (13) and a motor control device (14) for providing a nominal current for an electrical drive (15) of a fluid-hydraulic motor pump unit (20) for moving a die cushion of a die cushion press. The control value encoder (11) is provided in order to calculate a setpoint speed based on a die cushion control value command and a piece of die cushion information. The speed controller (12) calculates a setpoint current based on the setpoint speed. The current controller (13) calculates a control signal based on the setpoint current, and the motor control device (14) calculates the nominal current based on the control current. According to the invention, the dynamics of the control of the electrical machine can thus be improved.
H02P 27/08 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using DC to AC converters or inverters with pulse width modulation
H02P 23/16 - Controlling the angular speed of one shaft
H02P 25/00 - Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
B21D 24/14 - Devices controlling or operating blank holders independently, or in conjunction with dies pneumatically or hydraulically
F04B 17/03 - Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
F04B 49/20 - Control of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for in, or of interest apart from, groups by changing the driving speed
The invention relates to a worm drive comprising a worm shaft and a first receiving unit. The worm shaft is rotatably mounted in the first receiving unit. Furthermore, the worm drive comprises a worm wheel and a second receiving unit. The worm wheel is rotatably mounted in the second receiving unit. The first receiving unit is arranged on the second receiving unit and the rotatably mounted worm shaft is in contact with the worm wheel of the second receiving unit in order to transmit a torque. Furthermore, the worm drive comprises guide pins for detachably connecting the first receiving unit to the second receiving unit. More particularly, the first receiving unit receives at least part of the guide pins and the second receiving unit is connected to one of the guide pins, preferably to a first end of the guide pin. A spring element is arranged on a second end of the guide pin between the first receiving unit and a fastening means.
The invention relates to a radial reciprocating engine (1) having cylinders (5) arranged in a cylinder carrier (16) and a piston element (21) arranged in every cylinder (6), which piston element is connected to a guide element (22), wherein the guide element (22) runs on a sliding surface (14), as a result of which a stroke movement is imposed on the piston element (21). Because the piston element (21) is spherical, at least in the region of the piston element (21) which effects a seal during the stroke movements on inner walls (51) of the cylinder (5), a linear seal is created which allows a more compact design compared to radial pumps having cylindrical piston elements.
F04B 1/0426 - Arrangements for pressing the pistons against the actuated camArrangements for connecting the pistons to the actuated cam
F04B 1/1071 - Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement the cylinders being movable, e.g. rotary with actuating or actuated elements at the outer ends of the cylinders with rotary cylinder blocks
The hydraulic system according to the invention comprises: a hydraulic circuit with a low-pressure region and a high-pressure region; and a volume- and/or speed-variable hydraulic machine, which is driven by a first electric motor and which has an inlet and an outlet and provides a volume flow of a hydraulic fluid in the high-pressure region of the hydraulic circuit. The hydraulic system according to the invention further comprises: at least one movable shaft, which is arranged in the high-pressure region of the hydraulic circuit; at least one valve, which separates the high-pressure region from the low-pressure region; and at least one hydraulic fluid container, which is hydraulically connected to the low-pressure region of the hydraulic circuit. The hydraulic system according to the invention also has a discharge line, which discharges hydraulic fluid from the leakage of the hydraulic machine, and a cooling line for transporting the hydraulic fluid in order to cool the electric motor, the discharge line and the cooling line being fluidically connected to at least one of the hydraulic fluid containers.
The invention relates to a hydraulic system for controlling a stabiliser drive, in particular for controlling an angle of attack and/or controlling the pivoting out and in of a stabiliser wing, preferably for ships. The hydraulic system according to the invention comprises: a rotary vane motor which changes the angle of attack of the stabiliser wing; and/or a hydraulic cylinder for pivoting the stabiliser wing out and in. The hydraulic system also comprises a first hydraulic circuit. The first hydraulic circuit also comprises a low-pressure circuit and a high-pressure circuit, a device for providing an admission pressure of the low-pressure circuit, and two anti-cavitation valves which separate the first low-pressure circuit from the first high-pressure circuit. The hydraulic system according to the invention is also characterised in that a first hydraulic pump which is driven by an electric motor and has two connections is integrated in the high-pressure circuit and is hydraulically connected to the rotary vane motor and/or the hydraulic cylinder.
An electro-hydrostatic drive for realizing a rapid movement during a rapid movement phase, a force-building movement during a force-building movement phase. The apparatus comprises a hydro-machine with variable volume and/or rotational speed, driven by an electric motor, for providing a volume-stream of a hydraulic fluid, a first cylinder with a piston chamber, an rod chamber, and a plunger rod, a reservoir, a pressure source, a relief valve, a check valve, a fluid connection between the piston chamber and the hydro-machine, a fluid connection between the rod chamber and the hydro-machine, a fluid connection between the piston chamber and the reservoir, a fluid connection between the rod-chamber-side port of the hydro-machine and the reservoir, a fluid connection, through the relief valve, between the reservoir and the pressure source. The relief valve is for pressure safety of the reservoir, and the check valve has a fluid connection from the pressure source to the rod-chamber-side port of the hydro-machine, during the rapid movement phase, a first part of the hydraulic fluid is piped through the fluid connection between the piston chamber and the hydro-machine and the fluid connection between the rod chamber and the hydro-machine, and a second part of the hydraulic fluid communicates through the fluid connection between the piston chamber and the reservoir, during the force-building movement phase, a first part of the hydraulic fluid is piped through the fluid connection between the piston chamber and the hydro-machine and the fluid connection between the rod chamber and the hydro-machine, and a second part of the hydraulic fluid is piped through the fluid connection between the rod-chamber-side port of the hydro-machine and the reservoir.
Electrohydrostatic drive with an electromechanical drive with a rotating drive shaft and a first receiving unit, wherein the electromechanical drive is arranged in the first receiving unit. Furthermore, the electrohydrostatic drive comprises a pump unit and a second receiving unit, wherein the pump unit is arranged in the second receiving unit and the second receiving unit contains a transport fluid, and the first receiving unit and the second receiving unit are arranged in contact with one another, with the result that the electromechanical drive and the pump unit are connected to one another via the drive shaft. In addition, the electromechanical drive comprises a slide ring seal, wherein the slide ring seal is arranged along the direction of extent of the drive shaft, between the electromechanical drive and the pump unit, in such a way that the first receiving unit with the electromechanical drive and the second receiving unit with the pump unit are connected along the rotating drive shaft in a fluid-tight manner with respect to one another by way of the slide ring seal.
An electrohydrostatic actuator system comprising: a volume- and/or speed-variable hydraulic machine which is driven by an electric motor, for providing a volumetric flow of a hydraulic fluid; a differential cylinder with a piston side and a ring side, and at least one pretensioning source. The actuator system has a closed hydraulic circuit, wherein, during operation, the hydraulic fluid in the hydraulic circuit is pressurized by means of the hydraulic machine and/or the pretensioning source. Furthermore, according to the invention, the differential cylinder provides a power motion operating mode and a rapid motion operating mode. In order to balance a volume of the hydraulic fluid in the closed hydraulic circuit, according to the invention an expansion reservoir is connected to the piston side of the differential cylinder via a valve.
The invention relates to an extrusion press (10, 20, 30) with a press cylinder (111), which is driven by a electro-hydrostatic control system (104) for a power mode and is connected to a separate drive (120) for a speed mode, a detector (115), which is connected to a hydraulic cylinder (117) for the power mode and to an additional separate drive (119, 300) for the speed mode, and a hydraulic cylinder (101) with a blocking device (103) for the drive of a shearing tool (102), wherein the hydraulic cylinder (101) is connected to the electro-hydrostatic control system (104), and the press cylinder (111), in the power mode, and the hydraulic cylinder (101) for the drive of the shearing tool (102) are controlled in an alternating manner via the common electro-hydrostatic control system (104).
The invention relates to a press drive, such as those used in powder presses for example. A system according to the invention comprises an electro-hydrostatic actuator system (10) for a press drive, having an upper piston (100) with a press surface (120), which acts from a first direction, wherein the press surface (120) of the upper piston (100) is actuated by means of a piston rod (118) in a hydraulic cylinder (110) of the upper piston (100) and traverses a first distance during a press run, and a first electro-hydrostatic actuator (130) for driving the upper piston (100), comprising a first pump (132) and a first motor generator (134) which is actuated by a first controller (140). The system additionally comprises at least one auxiliary piston (200) with a press surface (220), which acts from a second direction opposite the first direction, wherein the press surface (220) of the auxiliary piston (200) is actuated by means of a piston rod (218) in a hydraulic cylinder (210) of the auxiliary piston (100) and traverses a second distance during the press run, and a second electro-hydrostatic actuator (230) for driving the at least one auxiliary piston (200), comprising a second pump (232) and a second motor generator (234) which is actuated by a second controller (240). The system is characterized in that the second motor generator (234) of the second electro-hydrostatic actuator (230) is operated as a generator during the press run, thereby generating energy which is provided to the first motor generator or auxiliary piston that is being operated as the motor via a common DC bus.
The present invention relates to an actuating drive having a variable-speed pump, as used, for example, in steam turbines, gas turbines and die casting machines. The electrohydrostatic actuating drive (10) has a variable-volume and/or variable-speed hydraulic machine which is driven by an electric motor, for the provision of a volumetric flow of a hydraulic fluid. Furthermore, the actuating drive comprises a cylinder (200) with a piston (210), a piston rod (230) and a first piston chamber (220), a valve (100) with a first position and a second position, which valve (100) can be moved by a first hydraulic actuator into the first position and by a second hydraulic actuator into the second position, wherein the second position controls a greater volumetric flow of the hydraulic fluid than the first position, a sink, a main line (130, 160) which connects a first piston chamber (220) of the cylinder (200) to the sink and in which the hydraulic machine (50) is arranged, an auxiliary line (110, 120) which connects the first piston chamber (220) to the sink and in which the valve (100) is arranged, a first control line (140) to the first hydraulic actuator, and a second control line (150) to the second hydraulic actuator. The actuating drive is characterized in that a hydraulic resistance (180) is arranged in the main line (130, 160) in series with the hydraulic machine (50), the first control line (140) is connected at the main line (130, 160), and the second control line (150) is connected between the hydraulic resistance (180) and the first piston chamber (220).
The present invention relates to hydraulic presses that has an electro-hydrostatic drive (10) for realizing a rapid movement and a force-building movement, comprising a hydro-machine (50) with variable volume and/or rotational speed, driven by an electric motor (60), for furnishing / providing a volume-flow of a hydraulic fluid, a first cylinder (100) with a housing (105), a piston (110), a cylinder rod (122), and a first (120) and a second (130) cylinder chamber, a second cylinder (200) with a piston (210), a cylinder rod (222), and a first (220) and a second (230) cylinder chamber, a moveable carrier plate (430), a pillar (410), and a clamping apparatus (390) to clamp and/or unclamp the first cylinder (100) to the pillar (410), where the hydraulic drive (10) has a closed hydraulic circuit, which has, when run, a positive pressure above atmospheric pressure and which, by means of the hydro- machine (50), can pressurize either the first (120) or the second (130) cylinder chamber of the first cylinder (100) and/or the first (220) or the second (230) cylinder chamber of the second cylinder (200). The invention is characterized in that the moveable carrier plate (430) is connected both to the first cylinder (100) and to the second cylinder (200), for the force-building movement, the first cylinder (100) is clamped, by the clamping apparatus (390), to the pillar (410) and one cylinder chamber (120, 130) of the first cylinder (100) is pressurized with the hydraulic fluid, and for the rapid movement, the first cylinder (100) is undamped, by the clamping apparatus (390), from the pillar (410) and one cylinder chamber (220, 230) of the second cylinder (200) is pressurized with the hydraulic fluid.
B30B 1/32 - Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by plungers under fluid pressure
B29C 45/67 - Mould opening, closing or clamping devices hydraulic
B30B 15/16 - Control arrangements for fluid-driven presses
The invention relates to a worm drive comprising a worm shaft and a first receiving unit. The worm shaft is rotatably mounted in the first receiving unit. Furthermore, the worm drive comprises a worm wheel and a second receiving unit. The worm wheel is rotatably mounted in the second receiving unit. The first receiving unit is arranged on the second receiving unit and the rotatably mounted worm shaft is in contact with the worm wheel of the second receiving unit in order to transmit a torque. Furthermore, the worm drive comprises guide pins for detachably connecting the first receiving unit to the second receiving unit. More particularly, the first receiving unit receives at least part of the guide pins and the second receiving unit is connected to one of the guide pins, preferably to a first end of the guide pin. A spring element is arranged on a second end of the guide pin between the first receiving unit and a fastening means.
The present invention relates to an electro-hydrostatic system (1) with a hydraulic machine (11) which is driven by an electric motor (10) and has a variable volume and/or rotational speed for providing a volumetric flow rate of a hydraulic fluid, a differential cylinder (20) with a piston surface and with an annular surface, and at least one equalization container (30, 37), wherein the drive system (1) has a closed hydraulic circuit and during operation has an overpressure relative to the environment by means of the hydraulic machine (11) and/or a pretensioning source (15, 37), and the drive system (1) provides a movement of the cylinder in a first direction by means of a volumetric flow rate of the hydraulic machine (11) and a volumetric flow rate from the equalization container (30, 37), and provides a movement in a second direction by means of a volumetric flow rate of the hydraulic machine (11) and a volumetric flow rate into the equalization container (30, 37), and a power operating mode and a speed operating mode are provided with the differential cylinder (20).
An apparatus according to the present invention is an electro-hydrostatic drive for realizing a rapid movement during a rapid movement phase, a force-building movement during a force-building movement phase. The apparatus comprises a hydro-machine (50) with variable volume and/or rotational speed, driven by an electric motor (60), for providing a volume-stream of a hydraulic fluid, a first cylinder (100) with a piston chamber (120), a rod chamber (130), and a plunger rod (132), a reservoir (200), a pressure source (400), a relief valve (480), a check valve (430), a fluid connection (125) between the piston chamber (120) and the hydro-machine (50), a fluid connection (135) between the rod chamber (130) and the hydro-machine (50), a fluid connection (125, 236, 235) between the piston chamber (120) and the reservoir (200), a fluid connection (237, 235) between the rod-chamber-side port of the hydro-machine (50) and the reservoir (200), a fluid connection, through the relief valve (480), between the reservoir (200) and the pressure source (400). The apparatus is characterized in that the relief valve (480) is for pressure safety of the reservoir (200), and the check valve (430) has a fluid connection from the pressure source (400) to the rod-chamber-side port of the hydro-machine (50), during the rapid movement phase, a first part of the hydraulic fluid is piped through the fluid connection (125) between the piston chamber (120) and the hydro-machine (50) and the fluid connection (135) between the rod chamber (130) and the hydro-machine (50), and a second part of the hydraulic fluid communicates through the fluid connection (125, 236, 235) between the piston chamber (120) and the reservoir (200), during the force-building movement phase, a first part of the hydraulic fluid is piped through the fluid connection (125) between the piston chamber (120) and the hydro-machine (50) and the fluid connection (135) between the rod chamber (130) and the hydro-machine (50), and a second part of the hydraulic fluid is piped through the fluid connection (237, 235) between the rod-chamber-side port of the hydro-machine (50) and the reservoir (200).
A safe hydraulic drive system and process, comprising at least one first cylinder chamber and a second, separate cylinder chamber which are connected to one another via a connecting line to form a fluid-filled hydraulic circuit, and a hydraulic drive for conveying the fluid from one cylinder chamber, via the connecting line, into the other cylinder chamber in which the connecting line is arranged. The connecting line has at least one parallel system, between the hydraulic drive and one of the two cylinder chambers, including at least one first sub-connection with at least one first stop valve and a second sub-connection with a baffle arranged therein. The connecting line, excluding the second sub-connection, has a first flow resistance and the second sub-connection has a second flow resistance due to the baffle arranged therein, which is greater than the first flow resistance for the fluid, wherein the drive system is provided with at least one open first stop valve in normal mode and with a closed first stop valve in safe mode for conveying the fluid, and a suitably high second flow resistance has been selected so that a maximum permissible speed for a piston rod is not exceeded in safe mode, even when an external force acts on the drive system in the direction of movement of the piston rod.
F15B 20/00 - Safety arrangements for fluid actuator systemsApplications of safety devices in fluid actuator systemsEmergency measures for fluid actuator systems
F15B 11/04 - Systems essentially incorporating special features for controlling the speed or the actuating force or speed of an output member for controlling the speed
The invention relates to an electro-hydrostatic system (1) comprising a hydraulic machine (11) which is driven by an electric motor (10) and has a variable volume and/or rotational speed for providing a volumetric flow rate of a hydraulic fluid, a differential cylinder (20) with a piston surface and with an annular surface, and at least one equalization container (30, 37). The drive system (1) has a closed hydraulic circuit and an overpressure relative to the surroundings during operation by means of the hydraulic machine (11) and/or a pretensioning source (15, 37). The drive system (1) provides a movement of the cylinder in a first direction by means of a volumetric flow rate of the hydraulic machine (11) and a volumetric flow rate from the equalization container (30, 37) and a movement in a second direction by means of a volumetric flow rate of the hydraulic machine (11) and a volumetric flow rate into the equalization container (30, 37). A speed operating mode and a power operating mode are provided by the differential cylinder (20).
F15B 7/00 - Fluid-pressure actuator systems in which the movement produced is definitely related to the output of a volumetric pumpTelemotors
B30B 15/16 - Control arrangements for fluid-driven presses
B30B 15/20 - Control arrangements for fluid-driven presses controlling the reciprocating motion of the ram controlling the speed of the ram, e.g. the speed of the approach, pressing or return strokes
The invention relates to a hydraulic drive (1) comprising a working cylinder (2) and a travel cylinder (3) which is mechanically connected to the working cylinder (2). The working cylinder (2) and the travel cylinder (3) each comprise an upper and a lower cylinder chamber (21, 22, 31, 32), and all four cylinder chambers (21, 22, 31, 32) of the working and travel cylinder (2, 3) are connected to one another in a suitable manner in a closed pressure circuit (4) which is filled and prestressed with a hydraulic fluid (F). A rotational speed-variable hydraulic machine (5) with a first and second pressure connection (51, 52) is arranged in the pressure circuit (4) in order to conduct the hydraulic fluid (F) between the individual cylinder chambers (21, 22, 31, 32) of the working and travel cylinder (2, 3) during the operation (B) of the hydraulic drive (1). At least one first and second distributing valve (6, 7) are arranged in the pressure circuit (4) such that the respective valve switch positions (61, 62, 71, 72, 73) which are suitable for the different operating phases of the hydraulic drive (1) together with the suitably driven hydraulic machine (5) allow a common movement of the work and travel cylinder (2, 3) in one or the other piston movement direction (R1, R2). For this purpose, preferably only the first and the second distributing valve (6, 7) are arranged in the pressure circuit (4). The hydraulic drive (1) requires a minimum number of components, maintains a low installation complexity, improves the energy efficiency, can be constructed in a compact manner, and can be operated in a sufficiently variable manner.
F15B 11/02 - Systems essentially incorporating special features for controlling the speed or the actuating force or speed of an output member
F15B 11/036 - Systems essentially incorporating special features for controlling the speed or the actuating force or speed of an output member for controlling the actuating force by means of servomotors having a plurality of working chambers
B30B 15/16 - Control arrangements for fluid-driven presses
B30B 1/32 - Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by plungers under fluid pressure
F15B 7/00 - Fluid-pressure actuator systems in which the movement produced is definitely related to the output of a volumetric pumpTelemotors
The invention relates to a safe hydraulic drive system and a process for operating such a drive system, moving a piston rod (23) of at least one cylinder (2), comprising at least one first cylinder chamber (21) and a second, separate cylinder chamber (22), which are connected to one another via a connecting line (3) to form a fluid-filled hydraulic circuit, and a hydraulic drive (4) for conveying (UN, US) the fluid (F) from one cylinder chamber (21, 22), via the connecting line (3), into the other cylinder chamber (21, 22), in which the connecting line (3) is arranged, wherein the connecting line (3) has at least one parallel system, between the hydraulic drive (4) and one of the two cylinder chambers (21, 22), consisting of at least one first sub-connection (31) with at least one first stop valve (311) and a second sub-connection (32) with a baffle (322) arranged therein, wherein the connecting line (3), excluding the second sub-connection (32), has a first flow resistance and the second sub-connection has a second flow resistance due to the baffle (322) arranged therein, which is greater than the first flow resistance for the fluid (F), wherein the drive system (1) is provided with at least one open first stop valve (311) in normal mode (N) and with a closed first stop valve (311) in safe mode (S) for conveying (UN) the fluid (F), and a suitably high second flow resistance has been selected so that a maximum permissible speed for the piston rod (23) is not exceeded in safe mode (S), even when an external force (FG) acts on the drive system (1) in the direction of movement (B) of the piston rod (23).
F15B 20/00 - Safety arrangements for fluid actuator systemsApplications of safety devices in fluid actuator systemsEmergency measures for fluid actuator systems
F15B 11/04 - Systems essentially incorporating special features for controlling the speed or the actuating force or speed of an output member for controlling the speed
This invention is about an apparatus (10) for measuring a hydraulic pressure of a hydraulic component (200), comprising a pressure sensor module (100) and a mounting plate (210), that is either an outer contour of the hydraulic component (200) or is connectable with the hydraulic component (200) in a substance-to-substance, form-locking and/or force-locking manner, wherein the pressure sensor module (100) comprises a housing (110), at least one pressure sensor (190) for determining the pressure of a fluid, at least one fluid connector (130) for hydraulic connection of the hydraulic component (200), at least one electrical connector comprising a conductive mating surface (125); the mounting plate (210) has a basic area (211) and at least one electrical connecting pin (222), whereby the connecting pin (222) spring loaded and is essentially perpendicular to the basic area (211) of the mounting plate (210), the first end (223) of the connecting pin (222) is oriented towards the basic area (211), the second end (224) of the connecting pin (222) is oriented away from the basic area (211), and the second end (224) of the connecting pin (222) is pressed, by means of an elastic element, away from the basic area (211) and towards the electrical connector (125) when the mounting plate (210) and the pressure sensor module (100) are assembled and the pressure sensor module (100) and/or the mounting plate (210) have at least one guiding element (341). The invention is characterized in that the pressure sensor (190), the fluid connector (130) and the electrical connector (125) are arranged within the housing (110), the mounting plate (210) is connectable with the pressure sensor module (100) in a force-locking manner and when the mounting plate (210) and the pressure sensor module (100) are assembled, the electrical connecting pin (222) is connected with the electrical connector (125) via its second end (224).
G01L 19/00 - Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
The invention relates to a hydraulic drive (1) comprising a working cylinder (2) and a travel cylinder (3) which is mechanically connected to the working cylinder (2). The working cylinder (2) and the travel cylinder (3) each comprise an upper and a lower cylinder chamber (21, 22, 31, 32), and all four cylinder chambers (21, 22, 31, 32) of the working and travel cylinder (2, 3) are connected to one another in a suitable manner in a closed pressure circuit (4) which is filled and prestressed with a hydraulic fluid (F). A rotational speed-variable hydraulic machine (5) with a first and second pressure connection (51, 52) is arranged in the pressure circuit (4) in order to conduct the hydraulic fluid (F) between the individual cylinder chambers (21, 22, 31, 32) of the working and travel cylinder (2, 3) during the operation (B) of the hydraulic drive (1). At least one first and second distributing valve (6, 7) are arranged in the pressure circuit (4) such that the respective valve switch positions (61, 62, 71, 72, 73) which are suitable for the different operating phases of the hydraulic drive (1) together with the suitably driven hydraulic machine (5) allow a common movement of the work and travel cylinder (2, 3) in one or the other piston movement direction (R1, R2). For this purpose, preferably only the first and the second distributing valve (6, 7) are arranged in the pressure circuit (4). The hydraulic drive (1) requires a minimum number of components, maintains a low installation complexity, improves the energy efficiency, can be constructed in a compact manner, and can be operated in a sufficiently variable manner.
F15B 11/02 - Systems essentially incorporating special features for controlling the speed or the actuating force or speed of an output member
B30B 15/16 - Control arrangements for fluid-driven presses
F15B 11/036 - Systems essentially incorporating special features for controlling the speed or the actuating force or speed of an output member for controlling the actuating force by means of servomotors having a plurality of working chambers
The invention relates to a hydrostatic radial piston machine, in particular a hydrostatic radial piston machine for actuating a differential cylinder. According to the invention, the hydrostatic machine of radial piston design has a control pin in a housing, wherein the hydrostatic machine has three hydraulic working connectors. The first working connector can be connected to the piston side of a differential cylinder, whereas the second working connector can be connected to the rod side of the differential cylinder. Finally, the third working connector can be connected to a tank. As a result of this arrangement, the differential cylinder can be operated directly with the aid of a single hydrostatic machine, wherein the connection of proportional or regulating valves in between can be dispensed with.
F04B 1/04 - Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
F04B 1/047 - Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement with actuating or actuated elements at the outer ends of the cylinders
F04B 1/053 - Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement with actuating or actuated elements at the inner ends of the cylinders
F03C 1/047 - Reciprocating-piston liquid engines with multiple cylinders, characterised by the number or arrangement of cylinders with cylinders in star- or fan-arrangement the pistons co-operating with an actuated element at the outer ends of the cylinders
F03C 1/053 - Reciprocating-piston liquid engines with multiple cylinders, characterised by the number or arrangement of cylinders with cylinders in star- or fan-arrangement the pistons co-operating with an actuated element at the inner ends of the cylinders
A fail-safe actuation system comprising an actuator having first and second chambers, a working circuit with a motor/pump device configured to actuate the actuator in an operative state, and a safety circuit configured to move the actuator into the safety position in a failure state, the safety circuit having a tank that holds pressurized fluid and that, in the failure state, is automatically connected to the first chamber via a switching valve, and having a drain valve that, in the failure state, is moved into a through-flow position in order to drain fluid out of the second chamber, the safety circuit configured such that, in the operative state, an inflow into the actuator—in a manner that is decoupled from the tank—is established by the working circuit, and, in the failure state, an inflow from the tank into the first chamber—in a manner that is completely decoupled from the working circuit—is created by the safety circuit, whereby a short-circuit fluid connection is provided between the first and second chambers that, in the failure state, is through-connected in order to generate a short-circuit flow between the first and second chambers.
F16D 31/02 - Fluid couplings or clutches with pumping sets of the volumetric type, i.e. in the case of liquid passing a predetermined volume per revolution using pumps with pistons or plungers working in cylinders
F15B 1/02 - Installations or systems with accumulators
F15B 20/00 - Safety arrangements for fluid actuator systemsApplications of safety devices in fluid actuator systemsEmergency measures for fluid actuator systems
G05D 16/20 - Control of fluid pressure characterised by the use of electric means
F03D 7/02 - Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
F15B 15/17 - Fluid-actuated devices for displacing a member from one position to anotherGearing associated therewith characterised by the construction of the motor unit of the straight-cylinder type of differential-piston type
45.
Delay-minimized detection of an auxiliary control variable
x and from an estimation error, whereby the estimation error is calculated from a comparison between the detected output variable and the integrated auxiliary control variable.
F04B 49/00 - Control of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for in, or of interest apart from, groups
G05B 11/42 - Automatic controllers electric with provision for obtaining particular characteristics, e.g. proportional, integral, differential for obtaining a characteristic which is both proportional and time-dependent, e.g. P. I., P. I. D.
G05B 13/02 - Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric
F04B 43/12 - Machines, pumps, or pumping installations having flexible working members having peristaltic action
Disclosed is a fail-safe fluidic actuation system (1) having a safety position, comprising a control element (2) having at least one first and one second chamber (3, 4); having a working circuit (5) with a motor/pump device (6), wherein the control element can be actuated by means of the working circuit at least in the operational state. Furthermore, the actuating system comprises a discharge valve (9) which, in a failure state, is placed into a pass-through position in order to discharge fluid from the second chamber, and the safety circuit is designed such that, in the operational state, an inflow decoupled from the store can be generated into the control element by means of the working circuit with the motor/pump device, wherein by means of the safety circuit, in a failure state, an inflow fully decoupled from the working circuit with the motor/pump device is provided into the first chamber by means of the store, wherein the control element has three chambers, and wherein the safety circuit is designed such that, in the operational state, an inflow decoupled from the store can be generated into the third chamber (15) by means of the working circuit with the motor/pump device.
F16D 31/02 - Fluid couplings or clutches with pumping sets of the volumetric type, i.e. in the case of liquid passing a predetermined volume per revolution using pumps with pistons or plungers working in cylinders
F15B 1/02 - Installations or systems with accumulators
F15B 20/00 - Safety arrangements for fluid actuator systemsApplications of safety devices in fluid actuator systemsEmergency measures for fluid actuator systems
G05D 16/20 - Control of fluid pressure characterised by the use of electric means
F03D 7/02 - Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
F15B 15/17 - Fluid-actuated devices for displacing a member from one position to anotherGearing associated therewith characterised by the construction of the motor unit of the straight-cylinder type of differential-piston type
Disclosed is a fail-safe fluidic actuation system (1) having a safety position, comprising a control element (2) having at least one first and one second chamber (3, 4); having a working circuit (5) with a motor/pump device (6), wherein the control element can be actuated by means of the working circuit at least in the operational state. Furthermore, the actuating system comprises a discharge valve (9) which, in a failure state, is placed into a pass-through position in order to discharge fluid from the second chamber, and the safety circuit is designed such that, in the operational state, an inflow decoupled from the store can be generated into the control element by means of the working circuit with the motor/pump device, wherein by means of the safety circuit, in a failure state, an inflow fully decoupled from the working circuit with the motor/pump device is provided into the first chamber by means of the store, wherein the control element has three chambers, and wherein the safety circuit is designed such that, in the operational state, an inflow decoupled from the store can be generated into the third chamber (15) by means of the working circuit with the motor/pump device.
F15B 20/00 - Safety arrangements for fluid actuator systemsApplications of safety devices in fluid actuator systemsEmergency measures for fluid actuator systems
The present invention relates generally to a weapon having an eccentrically-pivoted barrel (1) that is mounted on a movable base (2), and to a method of elevating and stabilizing such a barrel. A drive mechanism (3) acts between the barrel and the base to permit and enable the elevation of the barrel relative to the base to be selectively changed. A compensation device acts between the barrel and base to compensate for the unbalance of the barrel. The compensation device includes a gyroscope (13) mounted on the barrel and arranged to provide an output signal, a set point generator (12), a closed-loop control device (10) and an actuating element (16). The actual position of the barrel is sensed by the gyroscope, which supplies its output signal to the set point generator. The set point generator produces a set force value as a function of the gyroscope output signal. The set force value is supplied to the closed-loop control device, which produces a set point value that is, in turn, supplied to the actuator for controllably changing the elevation of the barrel.
An adjustment and stabilization unit (1), such as for a weapon, includes a movable platform (3), a rotational mass (2) mounted on the platform and stabilized in inertial space, and an adjustment drive (6) for adjusting the rotational mass. The adjustment drive includes a driving device (7) connecting the adjustment drive with the rotational mass, a force-sensing device (16) for measuring torque, and at least one stabilization control circuit for controlling the rotary adjustment drive by means of the measured torque. The force-sensing device (16) has an annular design and is arranged between the platform (3) and the adjustment drive (6). The driving device has a shaft (10) that extends through force-sensing device (16). The force-sensing device measures the torque transmitted between the adjustment drive and the platform, and being transmitted to the adjustment drive as a result of an acceleration of the rotational mass.
patents
