A tilt pad journal bearing for supporting a rotating shaft includes an annular support ring and a plurality of arcuate pads tiltably mounted in the annular support ring and circumferentially spaced apart from each other. The tilt pad journal bearing further has a lubrication arrangement disposed between each pair of the plurality of arcuate pads. The lubrication arrangement includes a lubrication manifold connected to the annular support ring and recessed relative to a shaft support surface of adjacent arcuate pads to define an oil mixing cavity, and a plurality of lubrication nozzles protruding from the lubrication manifold into the oil mixing cavity. A cross-sectional flow area of at least one of the plurality of lubrication nozzles positioned toward a center of the lubrication manifold is larger than a cross-sectional flow area of a remainder of the plurality of nozzles.
A steam turbine includes a high pressure stage, a low pressure stage, and a controller operatively connected to at least the low pressure stage. The low pressure stage includes a first low pressure section having a sensor configured for detecting operation data of the first low pressure section, and at least one second low pressure section. The controller is programmed or configured to receive the operation data from the first sensor during operation of the first low pressure section and determine at least one performance characteristic of the first low pressure section based on the operation data. The controller is further programmed or configured to turn off the first low pressure section when the at least one performance characteristic of the first low pressure section is outside a predetermined performance threshold, and turn on the second low pressure section. A method of operating the steam turbine is also disclosed.
F01K 13/02 - Controlling, e.g. stopping or starting
F01D 17/00 - Regulating or controlling by varying flow
F01D 19/00 - Starting of machines or enginesRegulating, controlling, or safety means in connection therewith
F01K 3/18 - Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein having heaters
F01K 7/16 - Steam engine plants characterised by the use of specific types of enginePlants or engines characterised by their use of special steam systems, cycles or processesControl means specially adapted for such systems, cycles or processesUse of withdrawn or exhaust steam for feed-water heating the engines being only of turbine type
37 - Construction and mining; installation and repair services
Goods & Services
Centrifugal compressors; centrifugal compressor connection adaptors for connecting centrifugal compressors to one another Centrifugal compressor construction services
4.
Tilt pad journal bearing with lubrication arrangement
A tilt pad journal bearing for supporting a rotating shaft includes an annular support ring and a plurality of arcuate pads tiltably mounted in the annular support ring and circumferentially spaced apart from each other. The tilt pad journal bearing further has a lubrication arrangement disposed between each pair of the plurality of arcuate pads. The lubrication arrangement includes a lubrication manifold connected to the annular support ring and recessed relative to a shaft support surface of adjacent arcuate pads to define an oil mixing cavity, and a plurality of lubrication nozzles protruding from the lubrication manifold into the oil mixing cavity. A cross-sectional flow area of at least one of the plurality of lubrication nozzles positioned toward a center of the lubrication manifold is larger than a cross-sectional flow area of a remainder of the plurality of nozzles.
A tilt pad journal bearing for supporting a rotating shaft includes an annular support ring and a plurality of arcuate pads tiltably mounted in the annular support ring and circumferentially spaced apart from each other. The tilt pad journal bearing further has a lubrication arrangement disposed between each pair of the plurality of arcuate pads. The lubrication arrangement includes a lubrication manifold connected to the annular support ring and recessed relative to a shaft support surface of adjacent arcuate pads to define an oil mixing cavity, and a plurality of lubrication nozzles protruding from the lubrication manifold into the oil mixing cavity. A cross-sectional flow area of at least one of the plurality of lubrication nozzles positioned toward a center of the lubrication manifold is larger than a cross-sectional flow area of a remainder of the plurality of nozzles.
A steam turbine includes a high pressure stage, a low pressure stage, and a controller operatively connected to at least the low pressure stage. The low pressure stage includes a first low pressure section having a sensor configured for detecting operation data of the first low pressure section, and at least one second low pressure section. The controller is programmed or configured to receive the operation data from the first sensor during operation of the first low pressure section and determine at least one performance characteristic of the first low pressure section based on the operation data. The controller is further programmed or configured to turn off the first low pressure section when the at least one performance characteristic of the first low pressure section is outside a predetermined performance threshold, and turn on the second low pressure section. A method of operating the steam turbine is also disclosed.
F01K 13/02 - Controlling, e.g. stopping or starting
F01K 7/16 - Steam engine plants characterised by the use of specific types of enginePlants or engines characterised by their use of special steam systems, cycles or processesControl means specially adapted for such systems, cycles or processesUse of withdrawn or exhaust steam for feed-water heating the engines being only of turbine type
F01K 3/18 - Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein having heaters
F01D 17/00 - Regulating or controlling by varying flow
F01D 19/00 - Starting of machines or enginesRegulating, controlling, or safety means in connection therewith
A bearing includes a thrust gas bearing attached to a journal bearing and two or more converging-diverging orifices defined in a surface of at least one of the thrust gas bearing and the journal bearing. The converging-diverging orifices supply at least one pressurized gas to an interior of the bearing. Hydrodynamic lifting grooves are provided on the faces of the thrust gas bearing and the journal bearing and provide improved load capacity and sealing capabilities. Control over the ratios of the pressurized gases provides for additional sealing capabilities and reduced leakage. A metal mesh damper provides increased damping of the gas bearing.
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 17/04 - Sliding-contact bearings for exclusively rotary movement for axial load only
F01D 25/16 - Arrangement of bearingsSupporting or mounting bearings in casings
A turbomachine includes a casing having an inlet end opposite an outlet end along a longitudinal axis of the casing; a shaft assembly provided within the casing, the shaft assembly extending from the inlet end to the outlet end; a plurality of rotating impellers extending radially outward from the shaft assembly; and a communication channel defined between two adjacent impellers to permit a backflow of fluid from a diffuser channel of a downstream impeller to a return channel of an adjacent upstream impeller.
An arrangement for intentionally mistuning a cavity formed adjacent an impeller in a turbomachine, the arrangement including at least two bladed elements defined within a perimeter of a casing wall adjacent the impeller, wherein the bladed elements are configured to mistune cavity acoustic modes to minimize acoustic pulsations in the cavity.
A turbomachine including a housing having an inlet end opposite and outlet end along a longitudinal axis of the housing, a shaft assembly provided within the housing, the shaft assembly extending from the inlet end to the outlet end, a rotor having at least one rotating impeller extending radially outward from the shaft assembly, and a return channel vane hub extending radially outward from the shaft assembly, the return channel vane hub includes at least one return channel vane extend therefrom, the at least one return channel vane comprising a body having a leading edge and a trailing edge, the leading edge is twisted and extended past an outer edge of the return channel vane hub, and the trailing edge is bowed outwardly.
An arrangement for intentionally mistuning a cavity formed adjacent an impeller in a turbomachine, the arrangement including at least two bladed elements defined within a perimeter of a casing wall adjacent the impeller, wherein the bladed elements are configured to mistune cavity acoustic modes to minimize acoustic pulsations in the cavity.
A fluid bearing for use in turbomachinery including at least one bearing pad configured to be arranged about a rotating member of the turbomachinery. Each bearing pad includes an internal cooling opening defined in the bearing pad and an internal channel network defined in the bearing pad with at least one channel node in fluid communication with the internal cooling opening and at least two passageways in fluid communication with and extending from the channel node through the bearing pad. At least one of the passageways extends to an exterior surface of the bearing pad to define at least one cooling discharge opening.
F16C 17/03 - Sliding-contact bearings for exclusively rotary movement for radial load only with tiltably-supported segments, e.g. Michell bearings
F16C 17/24 - Sliding-contact bearings for exclusively rotary movement characterised by features not related to the direction of the load with devices affected by abnormal or undesired conditions, e.g. for preventing overheating, for safety
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
A fluid bearing for use in turbomachinery including at least one bearing pad configured to be arranged about a rotating member of the turbomachinery. Each bearing pad includes an internal cooling opening defined in the bearing pad and an internal channel network defined in the bearing pad with at least one channel node in fluid communication with the internal cooling opening and at least two passageways in fluid communication with and extending from the channel node through the bearing pad. At least one of the passageways extends to an exterior surface of the bearing pad to define at least one cooling discharge opening.
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
A variable speed liquid LNG expander (X1) and a variable speed two-phase LNG expander (X2) in line, downstream from X1. The rotational speed of both expanders can be controlled and changed independent from each other. The speed of expander X1 and expander X2 is determined in such way that the amount of liquid LNG downstream from the PHS compared to the feed gas supply is maximized and the amount of vapor and boil-off downstream of X2 is minimized.
F25J 1/00 - Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
F25J 1/02 - Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen
A pneumatic trip system for a turbine includes a valve member; a valve stem connected to the valve member; and an actuator assembly connected to the valve stem. The actuator assembly includes a cylinder; a piston connected to the valve stem, the piston dividing the cylinder into a first chamber and a second chamber; a biasing element disposed in the second chamber of the cylinder; and a pneumatic circuit in communication with the second chamber of the cylinder. The pneumatic circuit is configured to pressurize the second chamber of the cylinder to actuate the piston to move the valve stem and the valve member to an exercised position between the open position and the closed position while the first chamber is pressurized.
F16K 31/122 - Operating meansReleasing devices actuated by fluid the fluid acting on a piston
F16K 37/00 - Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
F01D 17/14 - Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits
F15B 19/00 - Testing fluid-pressure actuator systems or apparatus, so far as not provided for elsewhere
F15B 20/00 - Safety arrangements for fluid actuator systemsApplications of safety devices in fluid actuator systemsEmergency measures for fluid actuator systems
F15B 11/10 - Servomotor systems without provision for follow-up action with only one servomotor in which the servomotor position is a function of the pressure
F01D 25/24 - CasingsCasing parts, e.g. diaphragms, casing fastenings
F16K 1/12 - Lift valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with streamlined valve member around which the fluid flows when the valve is opened
F16K 31/40 - Operating meansReleasing devices actuated by fluid in which fluid from the conduit is constantly supplied to the fluid motor with electrically-actuated member in the discharge of the motor
A pneumatic trip system for a turbine includes a valve member; a valve stem connected to the valve member; and an actuator assembly connected to the valve stem. The actuator assembly includes a cylinder; a piston connected to the valve stem, the piston dividing the cylinder into a first chamber and a second chamber; a biasing element disposed in the second chamber of the cylinder; and a pneumatic circuit in communication with the second chamber of the cylinder. The pneumatic circuit is configured to pressurize the second chamber of the cylinder to actuate the piston to move the valve stem and the valve member to an exercised position between the open position and the closed position while the first chamber is pressurized.
A thrust bearing includes a bearing retainer including a first ring and a second ring radially spaced from the first ring, the first ring and the second ring defining an annular passageway therebetween, and at least two bearing pad retaining arrangements extending from a first surface of the second ring, each bearing pad retaining arrangement defining a retaining channel therein, and at least two bearing pads circumferentially spaced within the bearing retainer. The bearing pads may be held within the bearing retainer via the bearing pad arrangements.
A thrust bearing includes a bearing retainer including a first ring and a second ring radially spaced from the first ring, the first ring and the second ring defining an annular passageway therebetween, and at least two bearing pad retaining arrangements extending from a first surface of the second ring, each bearing pad retaining arrangement defining a retaining channel therein, and at least two bearing pads circumferentially spaced within the bearing retainer. The bearing pads may be held within the bearing retainer via the bearing pad arrangements.
A power recovery system using the Rankine power cycle incorporating a two-phase liquid-vapor expander with an electric generator which further consists of a heat sink, a heat source, a working fluid to transport heat and pressure energy, a feed pump and a two-phase liquid-vapor expander for the working fluid mounted together with an electric generator on one rotating shaft, a first heat exchanger to transport heat from the working fluid to the heat sink, a second heat exchanger to transport heat from the heat source to the working fluid.
F03B 13/00 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates
F01K 11/02 - Steam engine plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
F03G 6/00 - Devices for producing mechanical power from solar energy
F03G 7/05 - Ocean thermal energy conversion, i.e. OTEC
F01K 25/10 - Plants or engines characterised by use of special working fluids, not otherwise provided forPlants operating in closed cycles and not otherwise provided for using special vapours the vapours being cold, e.g. ammonia, carbon dioxide, ether
H02K 7/18 - Structural association of electric generators with mechanical driving motors, e.g.with turbines
An inducer for vertical flow, cryogenic liquid centrifugal pumps comprising a stationary outer housing portion having an inlet and an outlet, the inlet located at a lower end and the outlet located at an upper end, the housing further having an inner wall portion with one or more spiral vanes projecting outwardly from the inner wall portion, the one or more spiral vanes defining one or more gap regions on the inner wall portion that spiral in a first direction, and an inner rotating impeller mounted on a rotating center shaft, the impeller having at least one curved blade which defines a curved, helicoid plane surface in which the slope of the plane increases as the distance from the center axis increases, the impeller rotating in a second direction which is in counter rotation to the first direction.
A turbomachine includes a plurality of rotating blades adjacent to a plurality of stationary vanes attached to a stationary casing. Stationary vanes are spaced apart circumferentially with equal spacing around an inner perimeter of the casing. Optionally, stationary vanes are offset radially and/or circumferentially. Stationary vanes may alternate with leading and/or trailing edges at different distances from the rotating blades. In one embodiment, stationary vanes have tapered leading and/or trailing edge angles to homogenize flow and reduce stator wake excitation, flow excitation, and acoustic excitation due to interaction with spinning modes of acoustic pressure pulsations at rotating blade passing frequency. Tapered trailing edges are arranged such that they are inclined at mutually opposing angles to reduce rotor blade and/or disk excitation by: a) homogenizing the successive wakes within the flow stream, and b) reducing the effect of vortices shed-off the stationary vanes on acoustic modes of the gas within the casing.
A cryogenic turbine expander system which consists essentially of a cryogenic liquid pressure vessel, and the vessel further accommodating a turbine expander, an internal bypass configuration, which are operable in parallel, a three-way valve to direct incoming high pressure liquefied gas flow to the turbine expander, or the internal bypass configuration, which further consists a Joule-Thomson valve, when the turbine expander is not operational.
F25J 1/00 - Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
F25J 1/02 - Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen
F16K 11/074 - 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 pivoted closure members with flat sealing faces
26.
Three-way integrated Joule-Thomson valve and liquefied gas expander
A cryogenic turbine expander system which consists essentially of a cryogenic liquid pressure vessel, and the vessel further accommodating a turbine expander, an internal bypass configuration, which are operable in parallel, a three-way valve to direct incoming high pressure liquefied gas flow to the turbine expander, or the internal bypass configuration, which further consists a Joule-Thomson valve, when the turbine expander is not operational.
F16K 11/074 - 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 pivoted closure members with flat sealing faces
F25J 1/02 - Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen
F25J 1/00 - Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
27.
Valve exerciser for an emergency shutoff valve of a steam turbine and method for using the same
An apparatus for exercising an emergency shutoff valve of a steam turbine and methods for operating the same are disclosed herein. A cover of the valve exerciser mounts on top of an emergency shutoff valve body and through a stroker bolt threadingly engaged with the shutoff valve lever arm, the valve stem is moved within a passageway of the cover a small amount so that the aperture between the steam inlet and outlet is not blocked, thereby permitting normal operation of the steam valve while the valve stem is exercised.
A stationary vane arrangement for guiding a working fluid from an inlet end of a turbomachine to an outlet end, the stationary vane arrangement comprising: at least one row of a plurality of stationary vanes (230) extending radially inwardly from a stationary casing in a circumferential spacing around the perimeter of the casing, each stationary vane (230) having a leading edge (320) opposite a trailing edge (310) and opposing longitudinal surfaces (300a, b) extending between the leading edge and the trailing edge, wherein the trailing edges of a first portion of the stationary vanes have a first end profile (340) and the trailing edges of a second portion of the stationary vanes have a second end profile (330) different from the first end profile, and wherein the stationary vanes are arranged such that each stationary vane having the first end profile is located between stationary vanes having the second end profile to minimize fundamental wake passing frequencies downstream of the trailing edges.
A power recovery system using the Rankine power cycle incorporating a two-phase liquid-vapor expander with an electric generator which further consists of a heat sink, a heat source, a working fluid to transport heat and pressure energy, a feed pump and a two-phase liquid-vapor expander for the working fluid mounted together with an electric generator on one rotating shaft, a first heat exchanger to transport heat from the working fluid to the heat sink, a second heat exchanger to transport heat from the heat source to the working fluid.
F03B 13/00 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates
F01K 11/02 - Steam engine plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
F03G 6/00 - Devices for producing mechanical power from solar energy
F03G 7/05 - Ocean thermal energy conversion, i.e. OTEC
F01K 25/10 - Plants or engines characterised by use of special working fluids, not otherwise provided forPlants operating in closed cycles and not otherwise provided for using special vapours the vapours being cold, e.g. ammonia, carbon dioxide, ether
30.
Power recovery system using a rankine power cycle incorporating a two-phase liquid-vapor expander with electric generator
A power recovery system using the Rankine power cycle incorporating a two-phase liquid-vapor expander with an electric generator which further consists of a heat sink, a heat source, a working fluid to transport heat and pressure energy, a feed pump and a two-phase liquid-vapor expander for the working fluid mounted together with an electric generator on one rotating shaft, a first heat exchanger to transport heat from the working fluid to the heat sink, a second heat exchanger to transport heat from the heat source to the working fluid.
F03B 13/00 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates
A gas turbine device includes an inlet casing and a stator diaphragm provided inside the inlet casing. The stator diaphragm has an integral inner stator shroud and an outer stator shroud and a plurality of stator vanes provided in a circumferential arrangement between the inner stator shroud and the outer stator shroud. A plurality of key slots is provided in a circumferential arrangement on the stator diaphragm and a corresponding plurality of key slots is provided in a circumferential arrangement on the inlet casing. The key slots provided on the stator diaphragm are aligned with the plurality of key slots provided on the inlet casing. A key is inserted into each of the plurality of key slots provided to prevent rotation of the stator diaphragm with respect to the inlet casing. The stator diaphragm is secured in an axial direction by a stator shear ring.
F01D 25/24 - CasingsCasing parts, e.g. diaphragms, casing fastenings
F02C 7/20 - Mounting or supporting of plantAccommodating heat expansion or creep
F01D 11/18 - Adjusting or regulating tip-clearance, i.e. distance between rotor-blade tips and stator casing by self-adjusting means using stator or rotor components with predetermined thermal response, e.g. selective insulation, thermal inertia, differential expansion
An improvement for a turbine generator or pump having main bearings separated by a span of shaft and a thrust equalizing mechanism adjacent one of said main bearings, the improvement comprising a stationary length compensator interposed between the thrust equalizing mechanism and its adjacent main bearing to reduce the span between said main bearings. Preferably the length compensator is composed of material that shrinks less than the shaft of the generator, and the height of the length compensator, i.e., the compensating dimension, is selected according to desired thrust equalizing mechanism operating parameters over a temperature range.
H02K 5/16 - Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
H02K 7/18 - Structural association of electric generators with mechanical driving motors, e.g.with turbines
H02K 5/167 - Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using sliding-contact or spherical cap bearings
F01D 25/16 - Arrangement of bearingsSupporting or mounting bearings in casings
F16C 19/52 - Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions
F16C 41/02 - Arrangements for equalising the load on a plurality of bearings or their elements
An improvement for a turbine generator or pump having main bearings separated by a span of shaft and a thrust equalizing mechanism adjacent one of said main bearings, the improvement comprising a stationary length compensator interposed between the thrust equalizing mechanism and its adjacent main bearing to reduce the span between said main bearings. Preferably the length compensator is composed of material that shrinks less than the shaft of the generator, and the height of the length compensator, i.e., the compensating dimension, is selected according to desired thrust equalizing mechanism operating parameters over a temperature range.
H02K 5/16 - Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
H02K 7/18 - Structural association of electric generators with mechanical driving motors, e.g.with turbines
H02K 5/167 - Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using sliding-contact or spherical cap bearings
F01D 25/16 - Arrangement of bearingsSupporting or mounting bearings in casings
F16C 19/52 - Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions
F16C 41/02 - Arrangements for equalising the load on a plurality of bearings or their elements
04 - Industrial oils and greases; lubricants; fuels
07 - Machines and machine tools
09 - Scientific and electric apparatus and instruments
11 - Environmental control apparatus
Goods & Services
Lubricating oil * for compressors * Air compressors Electronic controllers for air compressors [ Industrial air dryers for use with air compression machinery in industrial applications ]
A method for casting a diafram having inner and outer rings with preformed vanes circumferentially spaced therebetween is disclosed. A digital representation of a sand core is created. Based on this digital representation, a sand core is produced by bonding together successive layers of sand with droplets of a binder material using a binder printhead having nozzles for supplying jets of binder material droplets. A plurality of vanes is inserted into the cavities of the sand core. The sand core is then placed into a casting mold and filled with liquid metal. After the liquid metal has solidified and cooled, the sand core and any remaining sand is removed from the cast diafram.
A variable speed liquid LNG expander (X1) and a variable speed two-phase LNG expander (X2) in line, downstream from X1. The rotational speed of both expanders can be controlled and changed independent from each other. The speed of expander X1 and expander X2 is determined in such way that the amount of liquid LNG downstream from the PHS compared to the feed gas supply is maximized and the amount of vapor and boil-off downstream of X2 is minimized.
F25J 1/00 - Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
F25J 1/02 - Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen
37.
Passive dynamic inertial rotor balance system for turbomachinery
A passive dynamic inertial rotor balance system including a plurality of balancing members fitted onto a rotor shaft at locations of predicted maximum shaft modal deflection. Each of the balancing members has at least one chamber and located within the at least one chamber is a plurality of movable weights and a viscous fluid. As the shaft accelerates toward an unbalance point, the weights move within the at least one chamber to a location which is opposite from the unbalance point. The viscous fluid provides damping for the movable weights to prevent excess movement within the chamber and to provide lubrication thereof. A system for self-correcting an unbalance of a turbomachinery rotor during rotation of the rotor and a method for balancing a rotor in a turbomachinery is also provided.
A passive dynamic inertial rotor balance system including a plurality of balancing members fitted onto a rotor shaft at locations of predicted maximum shaft modal deflection. Each of the balancing members has at least one chamber and located within the at least one chamber is a plurality of movable weights and a viscous fluid. As the shaft accelerates toward an unbalance point, the weights move within the at least one chamber to a location which is opposite from the unbalance point. The viscous fluid provides damping for the movable weights to prevent excess movement within the chamber and to provide lubrication thereof. A system for self-correcting an unbalance of a turbomachinery rotor during rotation of the rotor and a method for balancing a rotor in a turbomachinery is also provided.
A gas turbine device includes an inlet casing and a stator diaphragm provided inside the inlet casing. The stator diaphragm has an integral inner stator shroud and an outer stator shroud and a plurality of stator vanes provided in a circumferential arrangement between the inner stator shroud and the outer stator shroud. A plurality of key slots is provided in a circumferential arrangement on the stator diaphragm and a corresponding plurality of key slots is provided in a circumferential arrangement on the inlet casing. The key slots provided on the stator diaphragm are aligned with the plurality of key slots provided on the inlet casing. A key is inserted into each of the plurality of key slots provided to prevent rotation of the stator diaphragm with respect to the inlet casing. The stator diaphragm is secured in an axial direction by a stator shear ring.
A method for casting a diafram having inner and outer rings with preformed vanes circumferentially spaced therebetween is disclosed. A digital representation of a sand core is created. Based on this digital representation, a sand core is produced by bonding together successive layers of sand with droplets of a binder material using a binder printhead having nozzles for supplying jets of binder material droplets. A plurality of vanes is inserted into the cavities of the sand core. The sand core is then placed into a casting mold and filled with liquid metal. After the liquid metal has solidified and cooled, the sand core and any remaining sand is removed from the cast diafram.
A brush ring seal device for installation within a packing case of a turbine includes: a brush seal carrier having a substantially ring-shaped body portion having a front face, a rear face, an inner circumferential groove, and an outer circumferential groove; a brush seal mounted within the inner circumferential groove of the brush seal carrier; and a ring-shaped spring mounted within the outer circumferential groove of the brush seal carrier. The rear face of the brush seal carrier is coated with an anti-friction coating, thereby allowing movement of the brush ring seal device within the packing case.
An assembly and method for an axial compressor includes an axial shaft extending between an inlet casing and a discharge casing along the longitudinal length of a compressor housing. The axial shaft assembly includes a first stub shaft, a second stub shaft, and a hollow shaft drum having a longitudinal axis. The first stub shaft and the second stub shaft are coupled to opposing ends of the shaft drum along its longitudinal axis. A plurality of keys is disposed in a radial arrangement near the outer circumference of the first and second stub shafts and the shaft drum. A plurality of pins engage the plurality of keys, whereby the pins prevent the shaft drum from rotating axially relative to the first stub shaft and the second stub shaft and prevent the shaft drum from axially and radially separating from the stub shafts.
The present disclosure provides an improved multistage cryogenic liquefied gas expander for transforming the energy of a pressurized liquefied gas into electric energy, capable of operating at variable speeds, the improvement being a multistage cryogenic liquefied gas expander having at least two stages where only the first stage has a non-rotating nozzle ring having a plurality of adjustable position guide vanes.
F03B 13/00 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates
44.
Power recovery system using a rankine power cycle incorporating a two-phase liquid-vapor expander with electric generator
A power recovery system using the Rankine power cycle incorporating a two-phase liquid-vapor expander with an electric generator which further consists of a heat sink, a heat source, a working fluid to transport heat and pressure energy, a feed pump and a two-phase liquid-vapor expander for the working fluid mounted together with an electric generator on one rotating shaft, a first heat exchanger to transport heat from the working fluid to the heat sink, a second heat exchanger to transport heat from the heat source to the working fluid.
F03B 13/00 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates
45.
Methods and apparatus for centrifugal pumps utilizing head curve
Centrifugal Pumps are known to exhibit unstable operating region(s) in flow as evidenced by unstable operating region(s) in flow as evidenced by the pump's flow-head curve that has either a flat or a positive slope. The unstable flow has been determined to be due to the generating of a vortex and appears in the cross-over pass located downstream of the pump impeller in the area where the flow direction changes or bends for entry into the diffuser, specifically an axial diffuser with blades. Once the flow-head curve for a selected centrifugal pump is plotted, the unstable area is manipulated by the use of tandem vane devices to eliminate the unstable regions of the flow head curve. These vane devices may be the full height or partial height vanes sized on the basis of the cross-over path for guiding the fluid stream from the pump impeller into the diffuser smoothly including a change in direction. A small axial gap is defined between the tandem vane and the downstream axial diffuser vanes. The tandem vane has its leading edge skewed a pre-selected amount for introducing a twisting movement into the fluid stream to reduce any vortices or eddies in the fluid stream to thereby causing the unstable area(s) of the flow-head curve to exhibit stable operation by the modified flow-head curve that is continuously rising toward pump shut-off. Since the various parameter for the vane devices are dependent on the design of the selected pump's impeller and the design of the diffuser blades, these must be experimented with to achieve the best flow rates.
An improved method and apparatus for supporting and adapting high pressure pumping apparatus for use on or in a marine vessel subject to direct dynamic motions imparted to the marine vessel without damaging the pumping apparatus to thereby extend the useful life of the pumping apparatus. For this purpose the method and apparatus is designed to prevent the deflection of the bearings by providing an axial support and radial damping to vibrations resulting from the motions imparted to the marine vessel. In addition, the pumping shaft is protected when inoperative by preventing the pumping shaft from rotation. Specifically the method and apparatus provide the suction vessel housing the high pressure pumping apparatus to be secured to the marine vessel's deck at all times along with the provision for absorbing the vibrations and stresses due to the marine vessel's movements imparted thereto by being subjected to the direct dynamic motions. The suction vessel for the pumping apparatus is relieved of the stresses at the head plate for the suction vessel by securing the bottom of the pumping apparatus to the suction vessel at all times. The pumping shaft is supported from the bottom of a vertical shaft for axially moving the shaft upwardly to keep the supporting bearing out of deflection so no forces are transmitted to the bearings when the pumping apparatus is non-operational and also prevents the pumping shaft from rotating.
A brush ring seal device for installation within a packing case of a turbine includes: a brush seal carrier having a substantially ring-shaped body portion having a front face, a rear face, an inner circumferential groove, and an outer circumferential groove; a brush seal mounted within the inner circumferential groove of the brush seal carrier; and a ring-shaped spring mounted within the outer circumferential groove of the brush seal carrier. The rear face of the brush seal carrier is coated with an anti-friction coating, thereby allowing movement of the brush ring seal device within the packing case.
A brush ring seal device for installation within a packing case of a turbine includes: a brush seal carrier having a substantially ring-shaped body portion having a front face, a rear face, an inner circumferential groove, and an outer circumferential groove; a brush seal mounted within the inner circumferential groove of the brush seal carrier; and a ring-shaped spring mounted within the outer circumferential groove of the brush seal carrier. The rear face of the brush seal carrier is coated with an anti-friction coating, thereby allowing movement of the brush ring seal device within the packing case.
Embodiments are directed to an expander having two or more hydraulic stages with different physical geometries. In an embodiment, a first hydraulic stage uses nozzle vanes machined with a first geometry, while a second hydraulic stage uses nozzle vanes machined with a second geometry. Different nozzle vanes can be combined to tune the performance of the expander as the optimal operating conditions change. In yet another embodiment, an expander is equipped with a generator having a double wound stator with two sets of parallel windings. For high operating loads greater than a threshold, a first set of windings operates while a second set of windings, operating at a lower frequency, is disconnected. For operating loads that are less than the threshold, the first set of windings is disconnected and the second set of windings operates, enabling the generator to continue to operate close to 100% load for less expander power.
An inducer for vertical flow, cryogenic liquid centrifugal pumps comprising a stationary outer housing portion having an inlet and an outlet, the inlet located at a lower end and the outlet located at an upper end, the housing further having an inner wall portion with one or more spiral grooves formed in the inner wall portion, the grooves defining a hollow opening in the inner wall portion that spiral in a first direction, and an inner rotating impeller mounted on a rotating center shaft, the impeller having at least one curved blade which defines a curved, helicoid plane surface in which the slope of the plane increases as the distance from the center axis increases, the impeller rotating in a second direction which is in counter rotation to the first direction.
An inducer with an exterior housing and/or interior hub that incorporates grooves or vanes that are helical in nature and in counter rotation with respect to the rotation of the blades of the inducer, which grooves or vanes capture fluid rotating with the inducer blades and use that rotation to guide the fluid up along paths formed by the grooves or vanes and into an impeller, pump or other device.
A seating and locking system for turbomachinery attached to the customer column housing the turbomachine. The seating and locking system includes two or more actuated pistons that push against a piston seat or locking groove of the turbomachine. The actuated pistons secure the turbomachine within the costumer column to prevent the turbomachine from moving and getting damaged. The seating and locking system further includes a seat attached below the customer column with two or more spring loaded rods. The seat forces the customer column and the turbomachine to remain fixed to the bottom of the vessel housing the customer column and the turbomachine. Embodiments can be used with pumps, expanders, turbines, compressors, and fans.
A cryogenic turbine expander system which consists essentially of a cryogenic liquid pressure vessel, and the vessel further accommodating a turbine expander, an internal bypass configuration, which are operable in parallel, a three-way valve to direct incoming high pressure liquefied gas flow to the turbine expander, or the internal bypass configuration, which further consists a Joule-Thomson valve, when the turbine expander is not operational.
A cryogenic submerged turbomachine equipped with one or more combinations of hydrostatic bearings, touchdown ball bearings, thrust bearings, and bushings. The pressurized fluid or gas introduced to the hydrostatic bearing creates a film of lubrication around at least one shaft of the turbomachine. A first combination includes at least a hydrostatic bearing or a pressurized journal bearing. A second combination includes a ball bearing and a thrust disk type bearing acting as a touchdown bearing. This second combination supports the rotor system of the turbine during transient periods when the Thrust Equalizing Mechanism device is not active, and decreases the axial thrust load during operation. A third combination uses a hydrostatic bearing with a sleeve that is joined as a unit with one or more ball bearings acting as touchdown ball bearings on the hydrostatic bearing sleeve.
F16C 21/00 - Combinations of sliding-contact bearings with ball or roller bearings, for exclusively rotary movement
F04B 35/04 - Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
56.
BOLTLESS MULTI-PART DIAPHRAGM FOR USE WITH A CENTRIFUGAL COMPRESSOR
A diaphragm assembly of a centrifugal compressor includes a return channel wall having a generally ring-like shape; a vane assembly having a plurality of vanes formed integrally with at least one ring-shaped track having a rail structure extending therefrom; and a diaphragm wall having a generally ring-like shape and at least one groove extending around a circumference thereof. The vane assembly is fixedly coupled to the return channel, thereby forming a return channel assembly. The return channel assembly is coupled to the diaphragm wall by sliding the rail structure into the at least one groove of the diaphragm wall.
A diaphragm assembly of a centrifugal compressor includes a return channel wall having a generally ring-like shape; a vane assembly having a plurality of vanes formed integrally with at least one ring-shaped track having a rail structure extending therefrom; and a diaphragm wall having a generally ring-like shape and at least one groove extending around a circumference thereof. The vane assembly is fixedly coupled to the return channel, thereby forming a return channel assembly. The return channel assembly is coupled to the diaphragm wall by sliding the rail structure into the at least one groove of the diaphragm wall.
Apparatus for assembling a permanent magnet rotor comprising a rotor fixture configured to slide over a smaller diameter bearing section of the rotor and abutting one end of a center axial section of the rotor and a split compression ring having an inner diameter that is sized to ride over the outer diameter of magnets in magnet carriers assembled on the rotor fixture.
H02K 15/03 - Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies having permanent magnets
59.
Method of positioning a bearing assembly and centering support structure therefor
A method of positioning a bearing of a turbomachine in a squeeze film annulus is disclosed. The method includes providing a bearing in which a rotor shaft is disposed and a bearing support mounted about and radially supporting the bearing, with the bearing support at least in part defining the squeeze film annulus. A further step typically includes providing a plurality of centering elements associated with the bearing and bearing support and acting to center the bearing within the squeeze film annulus, with the centering elements provided at radially spaced locations around the bearing. An additional step in the method may include individually machining or shimming the centering elements to adjust the positioning of the bearing in the squeeze film annulus or to impart pre-load to improve the resiliency of the centering elements.
B21D 53/10 - Making other particular articles parts of bearingsMaking other particular articles sleevesMaking other particular articles valve seats or the like
60.
Tilted cone diffuser for use with an exhaust system of a turbine
An exhaust system for a turbine includes an annular diffuser and a collector. The annular diffuser is positioned adjacent to a final stage of the turbine and includes a hub portion surrounding a turbine shaft and an outer cone having a substantially frusto-conical shape that is radially symmetrical about a central longitudinal axis thereof that is tilted relative to the turbine shaft. The collector has an inlet extending from the annular diffuser and an outlet. The collector is configured to include a turn that causes the collector to turn exhaust gases approximately 90° from the longitudinal axis of the turbine shaft. The outer cone of the annular diffuser is tilted in a direction of the turn of the collector.
A method of balancing an embedded permanent magnet motor rotor includes the steps of: a) providing a non-magnetic cylindrical shaft having an axis of rotation and a generally cylindrical surface with an even number of recessed slots defining an even number of ribs therebetween; b) machining an axial slot having a cross-section with a top opening, a bottom and two sides in a center portion of each of the recessed slots; c) sliding at least one balance weight into at least one of the axial slots; and d) inserting locating rods into the axial slot on each side of the at least one balance weight.
An apparatus for adjustment of inlet guide vanes of a compressor includes a ring having a plurality of slots spaced around a circumference thereof; a plurality of lever arm assemblies each having a pin that includes a body with a first end and a second end and a lever arm extending perpendicularly from the second end of the body of the pin; a plurality of vanes each coupled to an end of one of the plurality of lever arms by a shaft; and a rack and pinion drive mechanism. The pin of each of the lever arm assemblies is configured to be positioned within each of the plurality of slots such that the first end of the pin extends into the slot. The rack and pinion drive mechanism includes a pinion coupled to the shaft of one of the plurality of vanes, thereby creating a drive vane; and a driven rack operationally coupled to the pinion. The drive vane is configured to rotate the ring via the rack and pinion drive mechanism, thereby adjusting an angular position of the plurality of vanes.
Disclosed is a multi-axis workpiece manipulator or positioning device (10) having movement along two rectilinear axes (L1 and L2), two pivotable or tilt axes (T1 and T2) and two rotational axes (R1 and R2). The positioning device (10) includes a support base (12), a first member (18) attached to the support base (12) extending axially therefrom and a carriage (24) adjustably connected to the first member (18). The support base (12) is movable in a longitudinal path along a first rectilinear axis (L1) and the carriage is movable along the first member (18) in a vertical path along a second rectilinear axis (L2). A second member (30) is pivotably and rotatably attached to the carriage (24) and extends axially away from the carriage (24). The second member (30) can pivotably move along a first tilt axis (T1) with respect to the carriage (24) and can rotate in a circular path along a first rotational axis (R1). A third member (40) is pivotably and rotatably attached to an end of the second member (30), wherein the third member (40) can pivotably move along a second tilt axis (T2) with respect to the second member (30) and can rotate in a circular path along a second rotational axis (R2). A drive mechanism (D) operates the positioning device (10) for selectively positioning a workpiece (W) to be processed. This device (10) is particularly useful in fabricating compressor impellers.
A direct acting hydraulic voting trip block defines three separate paths between an inlet and an outlet port. Each path is intersected by a valve cylinder. Valve pistons in each valve cylinder are configured, in the activated position, to block two of thee different paths. As long as at least two of the pistons are in the activated position, communication between the inlet and outlet ports is prevented, thus providing a hydraulic majority voting logic valve system.
Apparatus and method for assembling a permanent magnet rotor comprising a rotor fixture configured to slide over a smaller diameter bearing section of the rotor and abutting one end of a center axial section of the rotor and a split compression ring having an inner diameter that is sized to ride over the outer diameter of magnets in magnet carriers assembled on the rotor fixture.
H02K 15/03 - Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies having permanent magnets
(1) Fail-safe turbine trip block, namely, an electro-hydraulic solenoid valve assembly used to dump hydraulic fluid from a trip valve actuator circuit to shut the tripping valve of steam turbines, hot gas expander valves, and other critical applications.
68.
Bearing assembly and centering support structure therefor
The bearing assembly includes an annular bearing in which the shaft is disposed and a support structure for supporting the bearing. The bearing support is mounted about and radially supports the bearing. The bearing support at least in part defines a squeeze film annulus of the bearing assembly. A plurality of centering elements is associated with the bearing and bearing support and act to center the bearing within the squeeze film annulus. The centering elements are provided at radially spaced locations around the bearing. The centering elements may also be cylinder springs provided at uniformly spaced locations around the bearing. The centering elements may additionally be load cell springs provided at uniformly spaced locations around the bearing. In an alternative embodiment, a singular annular wave spring may be provided in place of the plurality of centering elements.
F16C 27/06 - Elastic or yielding bearings or bearing supports, for exclusively rotary movement by means of parts of rubber or like materials
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
An impeller including a plurality of longitudinally-extending blades, each having a first edge and a second edge, a cover member with an inlet orifice and extending along at least a portion of the first edge of each of the plurality of blades, and a hub member extending adjacently along only a portion of the second edge of each of the blades. The cover member, plurality of blades and hub member are milled from a single, metal-based material of construction to form an integral, uniform structure. A kit for an impeller assembly and a method of manufacturing an impeller are also disclosed.
An impeller including a plurality of longitudinally-extending blades, each having a first edge and a second edge, a cover member with an inlet orifice and extending along at least a portion of the first edge of each of the plurality of blades, and a hub member extending adjacently along only a portion of the second edge of each of the blades. The cover member, plurality of blades and hub member are milled from a single, metal-based material of construction to form an integral, uniform structure. A kit for an impeller assembly and a method of manufacturing an impeller are also disclosed.
The present invention is a method of compressing lamination stacks for a permanent magnet rotor. The method includes the steps of providing a plurality of stages of lamination stacks and magnet carriers on a rotor shaft to form an assembly; positioning a spacer between each of the lamination stacks of each of the plurality of stages; and fitting a retainer plate with a groove at each end of the assembly. The groove allows a centrifugal force to deflect a top of the retainer plate inward toward the spacers and the spacers are milled to a size that is slightly wider than an axial gap between the lamination stacks of each stage. The groove on the retainer plates has a depth and radial position that determines the extent to which the top of the retainer plate deflects towards the spacers.
09 - Scientific and electric apparatus and instruments
Goods & Services
Machine tools for cleaning, removing, repairing and replacing of tubes in boilers and heat exchangers or any mechanical tube to flange joint and for use in cold-working bores or the outside surface of generally cylindrical bodies, namely, tube expanders, tube cleaners, tube cutters, tube finishing tools, mechanical joining tools and burnishing tools and electric and pneumatic motors for use in such tools in International Class 7. Torque controls for use with machine tools for cleaning, removing, repairing and replacing of tubes in boilers and heat exchangers or any mechanical tube to flange joint an for use in cold-working bores or the outside surface of generally cylindrical bodies, namely, tube expanders, tube cleaners, tube cutters, tube finishing tools, mechanical joining tools and burnishing tools in International Class 9.
(1) Steam and gas turbines, compressors, turbochargers comprising centrifugal blowers that are driven by turbines or motors for supplying air or gas, turbine gears.
STEAM AND GAS TURBINES, COMPRESSORS, TURBOCHARGERS COMPRISING CENTRIFUGAL BLOWERS THAT ARE DRIVEN BY TURBINES OR MOTORS FOR SUPPLYING AIR OR GAS, TURBINE GEARS, TUBE CLEANERS OF THE ROTARY IMPACT TYPE, TUBE EXPANDERS FOR MULTIPLE INSTALLATION OF TUBES IN BOILERS OR HEAT EXCHANGERS, ROLLED BURNISHING TOOLS FOR FINISHING SHAFTS, AND STEAM EJECTORS TUBE CLEANERS, TUBE EXPANDERS, TUBE CUTTERS, ROLLER BURNISHING TOOLS, ALL OF WHICH ARE HAND HELD
06 - Common metals and ores; objects made of metal
07 - Machines and machine tools
08 - Hand tools and implements
09 - Scientific and electric apparatus and instruments
11 - Environmental control apparatus
12 - Land, air and water vehicles; parts of land vehicles
16 - Paper, cardboard and goods made from these materials
21 - HouseHold or kitchen utensils, containers and materials; glassware; porcelain; earthenware
28 - Games; toys; sports equipment
07 - Machines and machine tools
11 - Environmental control apparatus
12 - Land, air and water vehicles; parts of land vehicles
07 - Machines and machine tools
11 - Environmental control apparatus
Goods & Services
STEAM AND GAS TURBINES, COMPRESSORS, [TURBOCHARGERS COMPRISING CENTRIFUGAL BLOWERS THAT ARE DRIVEN BY TURBINES FOR SUPPLYING AIR TO DIESEL ENGINES, TURBINE-GEARS, STEAM JET EJECTORS, AND TUBE CLEANERS OF THE ROTARY IMPACT TYPE] [FILTERS AND GREASE EXTRACTORS THAT ARE USED FOR REMOVING ORGANIC MATTER, SEDIMENT, ETC., AND FOR EXTRACTING OIL AND GREASE, FROM WATER IN POWER AND INDUSTRIAL PLANTS, AND FOR STRAINERS THAT ARE USED FOR STRAINING FUEL OIL FOR INTERNAL COMBUSTION ENGINES, LUBRICATING OIL IN LUBRICATING SYSTEMS AND WATER AND OTHER LIQUIDS FOR INDUSTRIAL USES] [FEEDWATER HEATERS FOR PRE-HEATING WATER THAT IS SUPPLIED TO WATER HEATERS, DEAERATING HEATERS FOR HEATING AND REMOVING GASES FROM WATER THAT IS USED FOR INDUSTRIAL PURPOSES, SURFACE CONDENSERS FOR CONDENSING VAPORS BY CONTACT WITH COOLED SURFACES, BAROMETRIC CONDENSERS FOR CONDENSING VAPORS BY CONTACT WITH LIQUIDS, JET CONDENSERS FOR CONDENSING VAPORS BY CONTACT WITH LIQUIDS, AND TURBOBLOWERS]
