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| Number | Title | Issue Date |
| 7004719 | Axial thrust balancing system for a centrifugal compressor, having improved safety characteristics An axial thrust balancing system for a centrifugal compressor, having improved safety characteristics, the centrifugal compressor comprising a rotor having impellers adjacent to each other and connected by a shaft, the rotor rotating in a stator, the centrifugal com... | 02/28/2006 |
| 6905123 | Seals A gas seal for providing a seal between a pair of relatively rotatable components is provided with a stand-still seal which will seal between the components when the components are stationary, the stand-still seal having a sealing element mounted in sealing relation... | 06/14/2005 |
| 6551084 | Screw rotor machine having means for axially biasing at least one of the rotors A helical screw rotor machine is provided which has at least one trunnion having an axial thrust surface located in a chamber filled with pressure medium and actuated axially by the pressure medium. A casing is closely fitted around the trunnion. The casi... | 04/22/2003 |
| 6517311 | Turbo-compressor A turbo-compressor having a housing and at least one rotor shaft pivotably supported in the housing, with a free shaft end and with a rotor connected with the other end of the rotor shaft. The free end of the rotor shaft facing away from the rotor project... | 02/11/2003 |
| 6367241 | Pressure-assisted electromagnetic thrust bearing A thrust compensation apparatus for high-speed rotating machinery includes an electromagnetic thrust bearing having a thrust rotor and a thrust stator, a first chamber filled with a pressurized medium on one side of the bearing, and a second chamber on th... | 04/09/2002 |
| 6310414 | Shaft bearing system A turboexpander associated with a rotary compressor by means of a rotor shaft connecting the two. A bearing housing includes magnetic radial and thrust bearings which control the placement and dynamics of the shaft within the housing. A control passageway... | 10/30/2001 |
| 6231302 | Thermal control system for gas-bearing turbocompressors A thrust control system for use with a turbocompressor having gas bearings. More specifically, the system concerns an arrangement of gas bearings for use in a turbocompressor or other device where a large temperature difference between the turbine and the... | 05/15/2001 |
| 6179554 | Low friction fluid bearing and turbine using same A low friction bearing comprises a first element having a first surface. A second element having a second surface is rotatable about a centerline relative to the first element. A flow passage extends radially outward between the first surface and the seco... | 01/30/2001 |
| 6017184 | Turbocharger integrated bearing system An integrated bearing system with journal and thrust bearings is incorporated in a single unit centrally pinned to the bearing housing and having integral thrust surface and journal surface lubrication grooves in combination with turbine and compressor wh... | 01/25/2000 |
| 5927720 | Two-piece labyrinth seal for a centrifugal compressor balance piston In order to accommodate a labyrinth seal whose diameter is too large to form a gas passage using conventional techniques, the labyrinth seal is made in two parts. A first part is an inner ring whose outer diameter is sufficiently small so as to permit the... | 07/27/1999 |
| 5735666 | System and method of controlling thrust forces on a thrust bearing in a rotating structure of a gas turbine engine A system for controlling thrust forces on a thrust bearing in a rotating structure of a gas turbine engine at designated operating points including a device for providing thrust load compensation to the thrust bearing, a control for operating the thrust l... | 04/07/1998 |
| 5603602 | Pressurized ball bearing assemblies A pressurized bearing assembly for turbomachines like gas turbine engines wherein pressurized oil is used to apply an axial force to the outer bearing race of a ball bearing assembly. The force is transmitted through the race to the ball bearings and to t... | 02/18/1997 |
| 5577885 | Condensing turbine having at least two seals for sealing off the turbine casing A condensing turbine includes a live-steam inlet, an exhaust-steam outlet and at least two seals for sealing off a turbine casing in the region of a turbine shaft carrying a turbine rotor. At least one of the seals is disposed on the live-steam side and o... | 11/26/1996 |
| 5412977 | Turbo machine with an axial dry gas seal In a turbo machine, for example, a turbo compressor, the rotor shaft extends through and is sealed relative a housing via dry gas seals in which a seal clearance is achieved between a rotating, sealing body and a non-rotating sliding body in which the inn... | 05/09/1995 |
| 5312225 | Axially thrust-compensated turbo machine In a turbo machine with magnetic bearings on both sides and dry gas seals for the rotor, the axial thrust acting upon the rotor and generated by the pressure difference between the pressure side and the suction side is compensated for in that a dry gas se... | 05/17/1994 |
| 5248239 | Thrust control system for fluid handling rotary apparatus A thrust control system for fluid handling rotary machines, such as turbo expanders equipped with a magnetic thrust bearing, includes a magnetic thrust control circuit for providing a thrust signal which is a measure of the magnitude and direction of the ... | 09/28/1993 |
| 5205706 | Axial flow turbine assembly and a multi-stage seal A labyrinth seal positioned between a turbine rotor and inner platforms of vanes of a turbine assembly controls the leakage flow of fluid from a chamber to the flowpath through the turbine assembly. The labyrinth seal is divided into two parts by a second... | 04/27/1993 |
| 5141389 | Control system for regulating the axial loading of a rotor of a fluid machine The axial forces imposed on a rotor of a fluid machine such as a compressor is controlled by modulating the pressure supplied to a piston and cylinder device acting between the rotor shaft and housing. A parameter indicative of axial force on the rotor du... | 08/25/1992 |
| 5104284 | Thrust compensating apparatus Thrust compensating apparatus for providing a thrust force to compensate for the thrust forces applied to the shaft of single stage overhung turbo machines by the fluid pressure in the cavity of the turbo machine is disclosed and includes a thrust compens... | 04/14/1992 |
| 5028204 | Gas compressor having a dry gas seal on an overhung impeller shaft A gas compressor, particularly of the kind for boosting pressure in gas transmission and petro chemical process, has an impeller mounted on an impeller shaft of the overhung type mounted on front and rear bearings and having at least one impeller mounted ... | 07/02/1991 |
| 4997340 | Balance piston and seal arrangement A labyrinth seal is provided to isolate the transmission from a balance piston of a centrifugal compressor, the labyrinth seal being pressurized with refrigerant vapor from the motor chamber, which vapor is at a pressure slightly above that in the transmi... | 03/05/1991 |
| 4993917 | Gas compressor having dry gas seals A gas compressor, particularly of the kind for boosting pressure in gas transmission lines, has an impeller mounted on a shaft located between two bearings with the gas space surrounding the impeller being separated from the bearings by dry gas seals, inc... | 02/19/1991 |
| 4864810 | Tractor steam piston balancing A steam piston balance means for a turbine engine comprises, in one form, a pressure chamber and means for supplying steam to the chamber to apply a force to walls of the chamber. The chamber is defined, in part, by an inner surface portion of a member co... | 09/12/1989 |
| 4822240 | Compressor thrust balancer A compressor includes a rotor which is subject on the inlet side to high pressure process fluid whereas the other end of the rotor is subject to atmospheric pressure. This creates a force unbalance in the axial direction for which thrust bearings are desi... | 04/18/1989 |
| 4730977 | Thrust bearing loading arrangement for gas turbine engines A plurality of openings are provided in a stationary wall of a gas turbine engine aft of the compressor discharge to admit compressor discharge air into a sealed cavity formed between the stationary wall and the rotor of the gas turbine engine. A valve, b... | 03/15/1988 |
| 4661043 | Steam turbine high pressure vent and seal system A steam turbine having a chamber in the inlet end thereof adjacent the thrust balance piston and dummy ring formed so that the temperature is substantially reduced while the pressure is only slightly reduced to optimize the pressure temperature affect on ... | 04/28/1987 |
| 4645433 | Sealing shroud centrifugal pump In a centrifugal pump containing a sealing shroud the pump impeller is mounted only radially for rotation on a stationary axle or shaft. The stationary axle or shaft is fixed in the suction connection by means of wing rib supports or ribs and possesses an... | 02/24/1987 |
| 4557664 | Control of steam turbine shaft thrust loads An overhung steam turbine is described which features a seal assembly and a bearing assembly to minimize axial shaft movement. The seal assembly forms a pressure barrier between a relatively low vacuum exhaust region and an exhaust cavity disposed at one ... | 12/10/1985 |
| 4538960 | Axial thrust balancing device for pumps This invention relates to an axial thrust balancing device for pumps which cancels an axial thrust caused by impellers by utilizing a discharge water pressure. In the device, there is provided a small axial gap between a low pressure sidewall of a balanci... | 09/03/1985 |
| 4309144 | Axial thrust bearing A method and apparatus for counteracting an axial thrust imparted to a shaft of a fluid turbine is disclosed. The apparatus includes first and second shaft thrust plates affixed to the shaft. A first, stationary axial thrust bearing engages the first shaf... | 01/05/1982 |
| 4159888 | Thrust balancing A gas turbine engine having variable geometry flow controllers therein for controlling mass flow in accordance with engine operation includes a rotor with a wide variation in thrust forces thereon during different phases of engine operation countered by a... | 07/03/1979 |
