A hydraulic transformer (1) comprises a housing (2) including a high-pressure connection (3), a low-pressure connection (4) and an operating pressure connection (5), a barrel member (19, 20) which is rotatably mounted in the housing (2) and provided with a plurality of compression chambers of which the volume changes upon rotating the barrel member (19, 20). A back side (24) of the barrel member (19, 20) includes barrel ports (27) which communicate with the respective compression chambers. The hydraulic transformer (1) has a face plate (28, 29) which is supported by the housing (2) and provided with a front side (30) that supports the back side (24) of the barrel member (19, 20), a back side (31) that faces the housing (2), a circumferential outer wall and a central hole (49) that is surrounded by a circumferential inner wall. The face plate (28, 29) is rotatable with respect to the housing (2) within a predetermined angle, wherein the front side (30) is provided with three arcuate face plate ports along which the barrel ports (27) travel upon rotating the barrel member (19, 20 20). The face plate ports communicate with the high-pressure connection (3) through a first passage (35) in the face plate (28, 29), the low-pressure connection (4) through a second passage (36) in the face plate (28, 29) and the operating pressure connection (5) through a third passage (37) in the face plate (28, 29), respectively. One of the first to third passages (35, 36, 37) has an opening at the back side (31) of the face plate (28, 29), one of the first to third passages (35, 36, 37) has an opening at the circumferential outer wall of the face plate (28, 29) and one of the first to third passages (35, 36, 30 37) has an opening at the circumferential inner wall of the face plate (28, 29).
F03C 1/06 - Reciprocating-piston liquid engines with multiple cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis
F04B 1/20 - Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
F04B 1/2021 - Details or component parts characterised by the contact area between cylinder barrel and valve plate
F04B 1/2092 - Means for connecting rotating cylinder barrels and rotating inclined swash plates
F04B 1/24 - Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block having two or more sets of cylinders or pistons inclined to the main shaft axis
F04B 1/303 - Control of machines or pumps with rotary cylinder blocks by turning the valve plate
F04B 1/306 - Control of machines or pumps with rotary cylinder blocks by turning the swash plate, e.g. with fixed inclination
A hydraulic device comprises an outer surface of a rotor rotating and facing an outer surface of a port member. The rotor has a plurality of cylinders disposed about an axis and cooperating pistons. The cylinders communicate with respective open ends at the rotor outer surface. Each open end alternatingly communicates with high and low pressure ports. Each two successive cylinders are interconnected via a fluid displacement member having first and second openings communicating with each respective cylinder and a closure element that obstructs either the first or second opening if the pressure in the cylinder that communicates with the second opening is higher or lower than the pressure in the cylinder that communicates with the first opening, respectively. The first opening and the second opening of each two fluid displacement members which communicate with one cylinder are fluidly connected with that cylinder at opposite sides of a flow resistance.
A hydraulic device (1) comprises a housing (2) and a shaft (3) which is mounted in the housing (2) and rotatable about a first axis of rotation (5). The shaft (3) has a flange (8) extending perpendicularly to the first axis of rotation (5). The hydraulic device (1) also comprises a plurality of pistons (9) including respective spherical piston heads (14) having respective centre points. The pistons (9) are fixed to the flange (8) at equiangular distance about the first axis of rotation (5) and have centrelines parallel to the first axis of rotation (5). The hydraulic device (1) comprises a plurality of separate sleeves (10) within which the respective pistons (9) are movable. The hydraulic device (1) comprises a barrel plate (15) which supports the sleeves (10). The barrel plate (15) including the sleeves (10) are rotatable about a second axis of rotation (27) which intersects the first axis of rotation (5) by an acute angle such that upon rotating the shaft (3) and the barrel plate (15) including the sleeves (10) each of the pistons (9) moves with respect to the cooperating sleeve (10) between a bottom dead centre and a top dead centre. The sleeves (10) are adapted such that at least when one of the pistons (9) is at bottom dead centre under operating conditions a centrifugal force on the cooperating sleeve (10) acts in radial direction from the second axis of rotation (27) between the barrel plate (15) and a centre point of the piston head (14) causing a tilting torque about the centre point of the piston head (14). The barrel plate (15) is provided with a plurality of actuators (21) for exerting counter forces (Fa) on the respective sleeves (10) in a direction and at a location such that at least when one of the pistons (9) is at bottom dead centre under operating conditions the counter force on the cooperating sleeve (10) acts along a line at a distance from the centre point of the piston head (14) and causes a counter torque about the centre point of the piston head (14) against the tilting torque, wherein the actuators (21) are controlled such that the counter forces (Fa) increase with increasing rotational speed of the barrel plate (15) about the second axis of rotation (27).
F03C 1/06 - Reciprocating-piston liquid engines with multiple cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis
F04B 1/22 - Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block having two or more sets of cylinders or pistons
F04B 1/30 - Control of machines or pumps with rotary cylinder blocks
A hydraulic device (1) comprises a rotor (3, 9, 10, 11, 16-18, 23) and a port member (5) including a high-pressure port (6) and a low-pressure port (7). An outer surface (21) of the rotor faces an outer surface (22) of the port member (5) and is rotatable with respect to the port member (5) in a rotational direction about an axis of rotation (19). The rotor is provided with a plurality of cylinders (11) located at angular distance from each other about the axis of rotation (19) and cooperating pistons (10) which are movable within the respective cylinders (11). The cylinders (11) communicate with respective open ends (25) at the outer surface (21) of the rotor wherein each of the open ends (25) alternatingly communicates with the high-pressure port (6) and the low-pressure port (7) under operating conditions. Each two successive cylinders (11) of the plurality of cylinders (11) are interconnected via a fluid displacement member (26) having a first opening (27) that communicates with one of the two successive cylinders (11), a second opening (28) that communicates with the other one of the two successive cylinders (11) and a closure element (29) that is freely movable between the first and second openings (27, 28) and configured such that it substantially obstructs either the first opening (27) or the second opening (28) if under operating conditions the pressure in the cylinder (11) that communicates with the second opening (28) is higher or lower than the pressure in the cylinder (11) that communicates with the first opening (27), respectively. In the rotor (3, 9, 10, 11, 16-18, 23) at a distance from each open end (25) a flow resistance (30) is provided, wherein the first opening (27) and the second opening (28) of each two fluid displacement members (26) which communicate with one cylinder (11) are fluidly connected with that cylinder (11) at opposite sides of the flow resistance (30).
F04B 1/20 - Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
F04B 1/24 - Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block having two or more sets of cylinders or pistons inclined to the main shaft axis
F04B 11/00 - Equalisation of pulses, e.g. by use of air vesselsCounteracting cavitation
F04B 53/16 - CasingsCylindersCylinder liners or headsFluid connections
F03C 1/06 - Reciprocating-piston liquid engines with multiple cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis
F01B 3/00 - Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis
A hydraulic device (1) comprises a housing (2) and a shaft (3) which is rotatable about a first axis of rotation (4). The shaft (3) has a flange (8), a partly spherical portion (16) and a plurality of pistons (9), which are fixed to the flange (8). The device (1) also has a plurality of cylindrical sleeves (11), wherein each sleeve (11) has a sleeve bottom (13) comprising a sleeve opening (14) including a centreline (23). The sleeves (11) cooperate with the pistons (9) to form respective compression chambers (12) of variable volume. A barrel plate (15) is mounted on the partly spherical portion (16) and has barrel plate ports (21) including respective centrelines (22). The sleeves (11) are rotatable about a second axis of rotation (19) which intersects the first axis of rotation (4) by an acute swash angle. The barrel plate (15) is coupled to the shaft (3) in rotational direction thereof by means of a plurality of pin-groove couplings creating a plurality of pivot axes (24) about the second axis of rotation (19). The widths of the grooves (18) allow the pins (17) to move within the respective corresponding grooves (18) in rotational direction about the second axis of rotation (19) under operating conditions. The relative position of the shaft (3) and the barrel plate (15) in rotational direction about the second axis of rotation (19) is adapted such that under operating conditions each centreline (22) of the respective barrel plate ports (21) fluctuates in rotational direction about the second axis of rotation (19) with respect to the centreline (23) of the corresponding sleeve opening (14) within a range in which the centreline (23) of the sleeve opening (14) lies.
F03C 1/06 - Reciprocating-piston liquid engines with multiple cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis
F04B 1/2092 - Means for connecting rotating cylinder barrels and rotating inclined swash plates
F04B 1/24 - Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block having two or more sets of cylinders or pistons inclined to the main shaft axis
F16D 3/205 - Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members one coupling part having radially projecting pins, e.g. tripod joints the pins extending radially outwardly from the coupling part
A hydraulic device (1) comprises a housing (27), a shaft (2) which is mounted in the housing (27) and rotatable about a first axis of rotation (4), wherein the shaft (2) has a flange (8) extending perpendicularly to the first axis (4), a plurality of pistons (9) which are fixed to the flange (8) at equiangular distance about the first axis of rotation (4), and a plurality of cylindrical sleeves (10) cooperating with the pistons (9) to form respective compression chambers (11) of variable volume. The sleeves (10) are rotatable about a second axis of rotation which intersects the first axis of rotation (4) by an acute angle such that upon rotating the shaft (2) the volumes of the compression chambers (11) change. Each piston (9) has a piston head (14) including a ball-shaped circumferential outer side. Each of the pistons (9) has a modular structure comprising a piston head member (14) which forms the piston head, a piston pin (20) which is fixed to the flange (8) and to which the piston head member (14) is mounted, and a spacer (26) which is located at the outer side of the piston pin (20) and sandwiched between the piston head member (14) and the flange (8).
F04B 1/20 - Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
A hydraulic device includes a shaft mounted in a housing rotatable about a first axis of rotation. The shaft has a flange extending perpendicularly to the first axis. A plurality of pistons is fixed to the flange. A plurality of cylindrical sleeves cooperates with the pistons to form respective compression chambers of variable volume. The cylindrical sleeves are rotatable about a second axis of rotation which intersects the first axis of rotation by an acute angle such that upon rotating the shaft the volumes of the compression chambers change. Each piston has a piston head including a circumferential wall of which the outer side is ball-shaped and the inner side surrounds a cavity. Each of the pistons is fixed to the flange by a piston pin having a piston pin head including a circumferential outer side facing the inner side of the circumferential wall of the piston head.
F04B 1/24 - Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block having two or more sets of cylinders or pistons inclined to the main shaft axis
F04B 53/00 - Component parts, details or accessories not provided for in, or of interest apart from, groups or
F04B 53/14 - Pistons, piston-rods or piston-rod connections
F01B 3/00 - Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis
A hydraulic device comprises a shaft mounted in a housing rotatable about a first axis. A plurality of pistons are fixed to a flange rotatable about a first axis. A plurality of cylindrical sleeves sleeve bottoms and sleeve jackets that cooperate with the pistons to form compression chambers. Rotation of the shaft causes the volumes of the compression chambers. Each piston head forms a sealing line within the cooperating sleeve jacket. Each sleeve jacket has a thin wall and/or is elastically movable with respect to the sleeve bottom such that at a fixed pressure the radial deformation of the sleeve jacket at the sealing line is substantially constant at piston positions ranging from bottom dead center to a position where the distance between the sleeve bottom and the sealing line is less than 50% of the distance between the sleeve bottom and the sealing line at bottom dead center.
A hydraulic device comprises a housing, a shaft rotatable about a first axis of rotation and a flange. A plurality of cylindrical sleeves cooperate with a plurality of pistons on the flange to form compression chambers, wherein the cylindrical sleeves are rotatable about a second axis of rotation which intersects the first axis of rotation by an acute angle such that upon rotating the shaft the volumes of the compression chambers change. A barrel plate is rotatable about the second axis has a first side for supporting the cylindrical sleeves. An opposite second side is supported by a supporting surface of a plate-shaped face element which is fixed to the housing. The supporting surface lies in a first plane. The face element has a back side that lies in a second plane, which forms an angle with the first plane that is smaller than said acute angle.
F04B 1/24 - Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block having two or more sets of cylinders or pistons inclined to the main shaft axis
F04B 1/22 - Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block having two or more sets of cylinders or pistons
F04B 1/2085 - Bearings for swash plates or driving axles
F03C 1/06 - Reciprocating-piston liquid engines with multiple cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis
A hydraulic device (1) comprises a housing (2) and a shaft (3) which is rotatable about a first axis of rotation (4). The shaft (3) has a flange (8),a partly spherical portion (16) and a plurality of pistons (9), which are fixed to the flange (8).The device (1) also has a plurality of cylindrical sleeves (11), wherein each sleeve (11) has a sleeve bottom (13) comprising a sleeve opening (14) including a centreline(23). The sleeves (11) cooperate with the pistons (9) to form respective compression chambers (12) of variable volume. A barrel plate (15) is mounted on the partly spherical portion (16) and has barrel plate ports (21) including respective centrelines (22). The sleeves (11) are rotatable about a second axis of rotation (19) which intersects the first axis of rotation (4) by an acute swash angle. The barrel plate (15) is coupled to the shaft (3) in rotational direction thereof by means of a plurality of pin-groove couplings creating a plurality of pivot axes (24) about the second axis of rotation (19). The widths of the grooves (18) allow the pins (17) to move within the respective corresponding grooves (18) in rotational direction about the second axis of rotation (19) under operating conditions. The relative position of the shaft (3) and the barrel plate (15) in rotational direction about the second axis of rotation (19) is adapted such that under operating conditions each centreline (22) of the respective barrel plate ports (21) fluctuates in rotational direction about the second axis of rotation (19) with respect to the centreline(23) of the corresponding sleeve opening (14) within a range in which the centreline (23) of the sleeve opening (14) lies.
F04B 1/20 - Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
F04B 1/24 - Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block having two or more sets of cylinders or pistons inclined to the main shaft axis
F03C 1/06 - Reciprocating-piston liquid engines with multiple cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis
A hydraulic device (1) comprises a housing (27), a shaft (2) which is mounted in the housing (27) and rotatable about a first axis of rotation (4), wherein the shaft (2)has a flange (8) extending perpendicularly to the first axis (4), a plurality of pistons (9) which are fixed to the flange (8) at equiangular distance about the first axis of rotation (4), and a plurality of cylindrical sleeves (10) cooperating with the pistons (9) to form respective compression chambers (11) of variable volume. The sleeves (10) are rotatable about a second axis of rotation which intersects the first axis of rotation (4) by an acute angle such that upon rotating the shaft (2) the volumes of the compression chambers (11) change. Each piston (9) has a piston head (14) including a ball-shaped circumferential outer side. Each of the pistons (9) has a modular structure comprising a piston head member (14) which forms the piston head, a piston pin (20) which is fixed to the flange (8) and to which the piston head member (14) is mounted, and a spacer (26) which is located at the outer side of the piston pin (20) and sandwiched between the piston head member (14) and the flange (8).
F04B 1/20 - Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
F04B 1/22 - Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block having two or more sets of cylinders or pistons
F04B 1/32 - Control of machines or pumps with rotary cylinder blocks by varying the relative positions of a swash plate and a cylinder block
12.
A HYDRAULIC DEVICE, A METHOD OF MANUFACTURING A HYDRAULIC DEVICE AND A GROUP OF HYDRAULIC DEVICES
A hydraulic device (1) comprises a housing (26), a shaft (2) which is mounted in the housing (26) and rotatable about a first axis of rotation (4). The shaft (2) has a flange (9) extending transversely to the first axis (4). The hydraulic device (1) comprises a plurality of pistons (10a) which are fixed to the flange (9) at equiangular distance about the first axis of rotation (4), a plurality of cylindrical sleeves (11a) cooperating with the pistons (10a) to form respective compression chambers (12) of variable volume, wherein the cylindrical sleeves (11a) are rotatable about a second axis (18) of rotation which intersects the first axis (4) of rotation by an acute angle (α±β) such that upon rotating the shaft (2) the volumes of the compression chambers (12) change. The hydraulic device (1) comprises a barrel plate (15a) which is rotatable about the second axis and which has a first side for supporting the cylindrical sleeves (11a), wherein the first side is directed to the pistons (10a), and an opposite second side which is supported by a supporting surface (20) of a plate-shaped face element (7a) which is fixed to the housing (26). The supporting surface (20) lies in a first plane (21a). The face element (7a) has a back side (23) which is located opposite to the supporting surface (20) and supported by the housing (26). The back side (23) lies in a second plane (22a). The first plane (21a) is angled with respect to the second plane (22a). The angle between the first plane (21a) and the second plane (22a) is smaller than said acute angle.
F04B 1/20 - Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
F04B 1/22 - Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block having two or more sets of cylinders or pistons
A hydraulic device (1) comprises a housing (27), a shaft (2) which is mounted in the housing (27) and rotatable about a first axis of rotation (4), wherein the shaft (2) has a flange (8) extending transversely to the first axis (4), a plurality of pistons (9) which are fixed to the flange (8) at equiangular distance about the first axis of rotation (4), a plurality of cylindrical sleeves (10) including sleeve bottoms (12) and sleeve jackets (13), respectively, and cooperating with the pistons (9) to form respective compression chambers (11) of variable volume. The cylindrical sleeves (10) are rotatable about a second axis of rotation which intersects the first axis of rotation (4) by an acute angle such that upon rotating the shaft (2) the volumes of the compression chambers (11) change between bottom dead centre and top dead centre of the pistons (9) within the sleeves (10). Each piston (9) has a piston head (14) including a circumferential wall of which the outer side is ball-shaped, hence forming a sealing line within the cooperating sleeve jacket (13), and the inner side surrounds a cavity (21). Each sleeve jacket (13) has such a thin wall and/or is elastically movable with respect to the sleeve bottom (12) such that at a fixed pressure in the compression chamber (11) the radial deformation of the sleeve jacket (13) at the sealing line is substantially constant at piston positions ranging from bottom dead centre to a position where the distance between the sleeve bottom (12) and the sealing line is less than 50% of the distance between the sleeve bottom (12) and the sealing line at bottom dead centre.
F04B 1/20 - Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
F04B 53/16 - CasingsCylindersCylinder liners or headsFluid connections
A hydraulic device (1) comprises a housing (27), a shaft (2) which is mounted in the housing (27) and rotatable about a first axis of rotation (4), wherein the shaft (2) has a flange (8) extending perpendicularly to the first axis (4), a plurality of pistons (9) which are fixed to the flange (8) at equiangular distance about the first axis of rotation (4) and a plurality of cylindrical sleeves (10) cooperating with the pistons (9) to form respective compression chambers (11) of variable volume. The cylindrical sleeves (10) are rotatable about a second axis of rotation which intersects the first axis of rotation (4) by an acute angle such that upon rotating the shaft (2) the volumes of the compression chambers (11) change. Each piston (9) has a piston head (14) including a circumferential wall of which the outer side is ball-shaped and the inner side surrounds a cavity (25). Each of the pistons (9) is fixed to the flange (8) by means of a piston pin (20) having a piston pin head (22) including a circumferential outer side facing the inner side of the circumferential wall of the piston head (14).
F04B 1/20 - Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
F04B 1/24 - Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block having two or more sets of cylinders or pistons inclined to the main shaft axis
F04B 53/00 - Component parts, details or accessories not provided for in, or of interest apart from, groups or
F04B 53/14 - Pistons, piston-rods or piston-rod connections
A hydraulic swash block positioning system for positioning a swash block to set a variable displacement, the hydraulic device including a rotor with pistons and piston chambers, the positioning system having, between the housing and the swash block, a positioning cylinder with a positioning piston forming a positioning chamber for setting an average value of the swash block position and a control valve connecting the high oil pressure source with the positioning chamber through a feeding line. In accordance with the invention the feeding line is connected to an oil container that has a variable container volume that can be adjusted synchronously with the changes in the number of piston chambers connected to the high oil pressure source.
F04B 1/324 - Control of machines or pumps with rotary cylinder blocks by varying the relative positions of a swash plate and a cylinder block by changing the inclination of the swash plate
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
F04B 1/20 - Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
F04B 1/22 - Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block having two or more sets of cylinders or pistons
F04B 49/12 - Control of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for in, or of interest apart from, groups by varying the length of stroke of the working members
The invention concerns a hydraulic swash block positioning system for positioning a swash block to set a variable displacement, the hydraulic device comprising a rotor with pistons and piston chambers, the positioning system comprising between the housing and the swash block a positioning cylinder with a positioning piston forming a positioning chamber for setting an average value of the swash block position and a control valve connecting the high oil pressure source with the positioning chamber through a feeding line. In accordance with the invention the feeding line is connected to an oil container that has a variable container volume and the oil container has means for adjusting the variable container volume synchronously with the changes in the number of piston chambers connected to the high oil pressure source.
A vehicle with a hydraulic transformer including a forward propulsion valve and a reverse propulsion valve connecting a common low-pressure rail respectively to a first motor line and a second motor line, which propulsion valves have a spring to hold the valve in a first position wherein it acts as a check valve blocking the flow to the common low-pressure rail and an actuator that can switch the propulsion valve to a second position connecting the common low-pressure rail to one of the motor lines.
B60K 6/12 - Prime-movers comprising combustion engines and mechanical or fluid energy storing means by means of a chargeable fluidic accumulator
F04B 1/20 - Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
F04B 1/24 - Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block having two or more sets of cylinders or pistons inclined to the main shaft axis
F16C 32/06 - Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings
F16H 61/4096 - Fluid exchange between hydrostatic circuits and external sources or consumers with pressure accumulators
B60K 7/00 - Disposition of motor in, or adjacent to, traction wheel
B60K 17/356 - Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles having fluid or electric motor, for driving one or more wheels
F15B 11/044 - Systems essentially incorporating special features for controlling the speed or the actuating force or speed of an output member for controlling the speed by means in the return line
F15B 3/00 - Intensifiers or fluid-pressure converters, e.g. pressure exchangersConveying pressure from one fluid system to another, without contact between the fluids
The invention is related to a hydraulic device comprising a housing including pipe ports, a rotor (14) having rotor chambers (9) which are formed by a cylinder (11) and a piston (12) which rotate about a first axis of rotation (ml) and a second axis of rotation (m2). Both axes of rotation extend within a common plane and intersect each other. A face plate (4) including a face plate centre line which coincides with the second axis of rotation (ml) has two or more face plate ports (3) which are each communicating with a pipe port for communicating the pipe port with the rotor chambers (9). An adjustment device adjusts the mutual positions of the face plate (4) and the common plane. Corresponding to the invention a face plate bearing (30, 32) between the face plate (4) and the housing has at least two axes of rotation which intersect the face plate centre line preferably perpendicularly and upon rotating the face plate (4) the common plane rotates with respect to the housing.
F03C 1/06 - Reciprocating-piston liquid engines with multiple cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis
F04B 1/20 - Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
F04B 1/24 - Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block having two or more sets of cylinders or pistons inclined to the main shaft axis
F04B 1/32 - Control of machines or pumps with rotary cylinder blocks by varying the relative positions of a swash plate and a cylinder block
F04B 27/08 - Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
19.
Axial bearing for use in a hydraulic device, a hydraulic transformer and a vehicle with a hydraulic drive system
An axial bearing between a first part and a second part that presses with an axial load against the first part and can rotate around a rotation axis relative to the first part comprising a circular or arc-shaped ridge on the first part centered around the rotation axis, a pressure source for providing pressurized hydraulic fluid on a first side of the circular or arc-shaped ridge, an adjustable gap between the circular or arc shaped ridge and a bearing surface on the second part, wherein the pressurized hydraulic fluid flows through the adjustable gap to a second side of the circular or arc-shaped ridge. In accordance with the invention the circular or arc-shaped ridge or the bearing surface include a ridge chamber for locally creating a larger adjustable gap between the circular or arc-shaped ridge and the bearing surface.
F16C 32/06 - Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings
F16C 17/00 - Sliding-contact bearings for exclusively rotary movement
20.
AXIAL BEARING FOR USE IN A HYDRAULIC DEVICE, A HYDRAULIC TRANSFORMER AND A VEHICLE WITH A HYDRAULIC DRIVE SYSTEM
The invention concerns an axial bearing between a first part and a second part that presses with an axial load against the first part and can rotate around a rotation axis relative to the first part comprising a circular or arc-shaped ridge on the first part centered around the rotation axis, a pressure source for providing pressurized hydraulic fluid on a first side of the circular or arc-shaped ridge, an adjustable gap between the circular or arc shaped ridge and a bearing surface on the second part, wherein the pressurized hydraulic fluid flows through the adjustable gap to a second side of the circular or arc-shaped ridge.In accordance with the invention the circular or arc-shaped ridge and/or the bearing surface comprise(s) a ridge chamber for locally creating a larger adjustable gap between the circular or arc-shaped ridge and the bearing surface.
B60T 1/10 - Arrangements of braking elements, i.e. of those parts where braking effect occurs acting by retarding wheels by utilising wheel movement for accumulating energy, e.g. driving air compressors
F16C 32/06 - Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings
F04B 1/20 - Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
F04B 1/24 - Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block having two or more sets of cylinders or pistons inclined to the main shaft axis
Device for controlling a fluid flow between a first pipe connection and a second pipe connection, comprising a housing, a valve body which can move in the housing in a direction of movement under the influence of pressure in the first pipe connection and/or the second pipe connection and possibly a spring and which housing has a first annular sealing surface relative to which a second annular sealing surface of the valve body can move for closing or controlling the fluid flow through an annular gap having two more or less parallel walls which are formed by the annular sealing surfaces. In accordance with the invention one of the annular sealing surfaces is adaptable and can create an annular gap with a changed difference in the distance to the other annular sealing surface at a first inner diameter and a first outer diameter.
The invention concerns a variable pump or hydraulic motor with a drive shaft with a first axis of rotation and first plungers connected to the drive shaft and rotatable around the first axis of rotation. A port plate mounted in the housing can rotate around an axis intersecting the first axis, for adjusting the stroke volume. The port plate positioning drive comprises two counter-acting hydraulic actuators acting on the port plate in the direction of the first plungers.
The invention concerns a hydraulic device with a housing and a rotor which can rotate in the housing and has fixedly mounted pistons. Around the piston there are drum sleeves which each, together with a piston, form a chamber of variable volume and which are supported by a drum plate with an axis which intersects the axis of the rotor at an angle. Clamping means hold the drum sleeve against the drum plate and the clamping means are designed in such a manner that the drum sleeves can make a movement along the drum plate which is double of the radial movement which occurs in the event of synchronous rotation between the drum plate and a drum sleeve.
F01B 3/00 - Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis
F01B 1/00 - Reciprocating-piston machines or engines characterised by number or relative disposition of cylinders or by being built-up from separate cylinder-crankcase elements
F04B 1/12 - Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
patents
