| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 415104000 | WITH SHAFT CONNECTED FLUID FORCE SUBJECTED THRUST BALANCING SURFACE | 18 |
| 20090155049 | ROTARY PUMP WITH EXCLUSIVELY HYDRODYNAMICALLY SUSPENDED IMPELLER - A pump assembly | 06-18-2009 |
| 20130121808 | LIQUID PUMP WITH AXIAL THRUST WASHER - A liquid pump, in particular a water pump, comprises a pump housing, which has a thrust bearing seat, a bearing bolt and a bearing mounted on the bearing bolt. In this case, a thrust washer is arranged between the thrust bearing seat of the pump housing and the bearing. Furthermore, a flexible washer is arranged between the thrust bearing seat and the thrust washer. | 05-16-2013 |
| 20100068031 | Multiple-stage centrifugal pump including a controlled leakage hydraulic balancing drum - A multiple-stage centrifugal pump comprises a balancing drum coupled to the pump shaft, being axially locked, and turning in a pump body cavity with a minimum clearance; a rotary ring element mounted on the balancing drum and rotating therewith, but being able of axially moving with respect to the rotary shaft, and a fixed ring element mounted on the bottom of the body, a face of the rotary ring element having an annular surface and forming with the fixed ring element a radial breakage path therethrough the fluid flows, the outer diameter of the drum and rotary ring element forming an annular surface providing an axial pushing force, the outer diameter of the rotary ring element, forming a narrowed portion, being less than the diameter of the balancing drum, a pressure difference operating on these surfaces providing a contactless leakage between the rotary ring and fixed ring elements, the axial position of the rotary ring element depending on a combined action of two pushing forces, thereby providing a very stable operation of the pump, the rotary ring element participating in applying the balancing force of the pump rotor thereby limiting the leakage flow loss. | 03-18-2010 |
| 20080213085 | Steam Turbine and Method for Operation of a Steam Turbine - Disclosed is a steam turbine comprising an exterior housing and an interior housing. The exterior housing and the interior housing are provided with a fresh steam supply duct. A rotor that encompasses several impeller blades and a thrust-compensating piston is rotably mounted within the interior housing. Said interior housing is equipped with several guide blades that are disposed such that a flow duct comprising several blade stages, each of which comprises a series of impeller blades and a series of guide blades, is formed along a specific direction of flow. The interior housing is further equipped with a recirculation duct which is embodied as a pipe that communicates between a space located between the interior housing and the exterior housing and the flow duct downstream of a blade stage. The interior housing is additionally equipped with a supply duct that is configured as a pipe which communicates between the space located between the interior housing and the exterior housing and an antechamber of the thrust-compensating piston located between the thrust-compensating piston of the rotor and of the interior housing. | 09-04-2008 |
| 20090311089 | TURBOMACHINE WITH A LONG LASTING POSITION-HOLDING SYSTEM - A turbomachine arranged with a rotor and a stator, including radial positioning means ensuring that the rotor is radially position; and a contactless axial balancing device arranged on at least one bladed wheel for axially balancing the rotor at high speed. The turbomachine includes a thrust bearing distinct from the radial positioning means serving to balance the rotor axially at low speed, and without contact at high speed. In addition, the radial positioning means are hydrostatic bearings, the turbomachine including hydrostatic bearing feed circuits suitable for connecting said bearings to a source of fluid under pressure. As a result, it is possible to obtain operation at high speeds with a very long lifetime. | 12-17-2009 |
| 20090185895 | Steam Turbine - Disclosed is a steam turbine with a casing, wherein a turbine shaft having a thrust-compensating piston is rotatably mounted inside the casing and directed along a rotation axis, wherein a flow passage is formed between the casing and the turbine shaft. The turbine shaft has in its interior a cooling line for directing cooling steam in the direction of the rotation axis. The cooling line, on one end, is connected to at least one inflow line for the inflow of cooling steam into the cooling line from the flow passage, and on the other end, is connected to an outflow line for directing cooling steam onto a lateral surface of the thrust-compensating piston. An essential aspect is, the cooling steam discharging onto the lateral surface of the thrust-compensating piston mixes with some of the live steam and is directed back into the flow passage via a return line arranged in the casing. | 07-23-2009 |
| 20100014957 | THRUST BALANCE OF ROTOR USING FUEL - A method of at least partially balancing axial thrust loads and an engine in which the method is carried out is disclosed herein. The engine includes a combustion chamber and a fuel system operable to direct pressurized fuel to the combustion chamber. The engine also includes a rotor operable to rotate about a centerline axis and subjected to axial thrust loads during operation. The engine also includes a balance piston engaged with the rotor. The balance piston includes a pressure face positioned in a thrust cavity. The engine also includes a fluid passageway extending between the fuel system and the thrust cavity. Pressurized fuel is delivered to the pressure face to counteract axial thrust loads on the rotor. | 01-21-2010 |
| 20080267766 | ROTOR SUPPORTS AND SYSTEMS - A rotor support includes a first ring disposed around a first axis, a second ring disposed around the first axis downstream from the first ring, and a plurality of beams extending between the first and the second rings. Each beam is configured to provide an axial stiffness, when an axial force is exerted on the first ring, and a radial stiffness, when a radial force is exerted on the first ring. Each beam has a height extending parallel to a second axis and a width extending parallel to a third axis. The beams are distributed around the first ring to provide a substantially uniform circumferential axial stiffness around the rotor support, and the height of each beam is greater than the width of each beam. Damping can be provided by the placement of a damper between the rotor support and the support housing. | 10-30-2008 |
| 20110217157 | CONTROL VALVE WITH RADIAL SEALS - A control valve is provided that includes a valve body, a valve element, a first radial seal, and a second radial seal. The valve body forms an inlet, an outlet, and a fluid flow passage therebetween. The valve element is disposed at least partially within the valve body, and is movable between at least a closed position and an open position. When the valve element is in the closed position, fluid is restricted from flowing through the fluid flow passage. When the valve element is in the open position, the fluid is allowed to flow through the fluid flow passage. The first radial seal is disposed against the valve body at a first distance from a centerline of the control valve. The second radial seal is disposed against the valve body at a second distance from the centerline, the second distance being greater than the first distance. | 09-08-2011 |
| 20100329845 | TURBO-MACHINE HAVING BELLOWS UNIT FOR AUTOMATIC AXIAL THRUST CONTROL - The turbo-machine of the present invention includes a volute casing, a rotating shaft, an impeller, seals, an axial thrust control member and a bellows unit. The volute casing defines therein a fluid passage. The rotating shaft is rotatably provided in the volute casing. The impeller is coupled to the rotating shaft to draw fluid using centrifugal force. The seals are provided around the front and rear ends of the impeller to prevent leakage of fluid. The axial thrust control member is installed in the volute casing behind the impeller. The bellows unit includes the piston installed in the volute casing in a shape surrounding a circumferential outer surface of the axial thrust control member; and a bellows connected with one surface of the piston, the bellows having the predetermined elasticity; and an internal space, between the piston and the volute casing, isolated from the fluid drawn behind the impeller. | 12-30-2010 |
| 20100272555 | HYDRAULIC MACHINE, AN ENERGY CONVERSION INSTALLATION INCLUDING SUCH A MACHINE, AND THE USE OF A HYDROSTATIC LABYRINTH-BEARING IN SUCH A MACHINE - This hydraulic machine ( | 10-28-2010 |
| 20100158668 | CENTRIFUGAL COMPRESSOR FORWARD THRUST AND TURBINE COOLING APPARATUS - A gas turbine engine centrifugal compressor axial forward thrust apparatus bleeds impeller tip aft bleed flow from between an annular centrifugal compressor impeller of a high pressure rotor and a diffuser directly downstream of the impeller. The apparatus then uses the aft bleed flow to pressurize an annular cavity extending radially between an inner combustor casing and the rotor and extending axially between forward and aft thrust balance seals. Forward and aft thrust balance lands are in sealing engagement with the forward and aft thrust balance seals on the high pressure rotor respectively. An annular stator plenum in fluid communication with the annular cavity is bounded in part by a forward end wall having conical diffusion holes therethrough which may be axially or circumferentially or axially and circumferentially angled. The forward thrust balance seal may be on an aft conical arm of the impeller. | 06-24-2010 |
| 415106000 | Fluid force on opposite face of blade or blade support member | 2 |
| 20090074561 | AXIAL THRUST OFFLOADING DEVICE - The invention concerns an axial thrust offloading device for the axial thrust balance of a machine shaft, including:
| 03-19-2009 |
| 20090074560 | Thrust balancing device for cryogenic fluid machinery - 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. | 03-19-2009 |
| 415107000 | Motor shaft | 4 |
| 20090067984 | GAS TURBINE WITH AXIAL THRUST BALANCE - A method for axial thrust control of a gas turbine, and a gas turbine with a device for controlling axial thrust are provided. A gas turbine, with regard to aerodynamic forces and pressure forces, which exert an axial force upon the rotor, is configured such that at no-load and low partial load it has a negative thrust, and at high load it has a positive thrust. In order to ensure a resulting positive thrust upon the thrust bearing within the entire load range of the gas turbine, an additional thrust is applied in a controlled manner. The additional thrust for example can be controlled in dependence upon the gas turbine load. The resulting thrust force at full load is consequently less than in the case of a conventionally designed gas turbine without thrust balance. | 03-12-2009 |
| 20110188992 | METHOD AND A DEVICE FOR BALANCING PRESSURE IN A TURBOJET BEARING ENCLOSURE - A pressure-balancing device for balancing pressure in at least one bearing enclosure of a turbojet, the enclosure including a mechanism feeding the bearing with lubricating liquid, an air intake, at least one sealing system placed between the stator and the rotor in front of and/or behind the bearing, a recovery mechanism recovering the lubricating liquid, and a removal mechanism removing the mixture of air and of traces of lubricating liquid towards a venting circuit. Downstream from the bearing enclosure and in the venting circuit, the balancing device includes a regulator system regulating the air removal flow rate, thereby enabling the flow rate to be variable as a function of the speed of the engine, to remain non-zero, and, at high speeds, to be lower than when the regulator system is not included. | 08-04-2011 |
| 20100272556 | LOAD DISTRIBUTION SYSTEM FOR GAS TURBINE ENGINE - There is provided an axial bearing load distribution system for a gas turbine engine of the type having a low pressure rotor supported by axial bearings. The system comprises a line having an inlet end positioned in a high-pressure compressor gas path downstream of any compressor stage provided with a variable geometry. The line is adapted to sense static pressure in the high-pressure compressor gas path. The line has an outlet end producing the static pressure. An air-tight pressure actuator is operatively connected to the outlet end and to one of the axial bearings to exert a force on the axial bearing proportionally to a pressure of the outlet end. | 10-28-2010 |
| 20110158790 | SYSTEMS AND APPARATUS RELATING TO STEAM TURBINE OPERATION - A steam turbine power plant that includes a first steam turbine, the steam turbine power plant including: a thrust piston operably connected to the first steam turbine via a shaft; and means for applying a supply of pressurized steam against the thrust piston such that the thrust piston applies a desired thrust force to the shaft. The desired thrust force may comprise a thrust force that partially balances a thrust force the first steam turbine applies to the shaft during operation. | 06-30-2011 |
