公开(公告)号：US2602632A

公开(公告)日：1952-07-08

申请号：US13958550

申请日：1950-01-20

Applicant: SERDUKE JAMES T ,  WEBSTER ROBERT O

Inventor： SERDUKE JAMES T ,  WEBSTER ROBERT O

IPC: F01D25/22 ,  F16C32/06

CPC classification number: F16C32/06 ,  F01D25/22

公开(公告)号：US12203413B1

公开(公告)日：2025-01-21

申请号：US18215957

申请日：2023-06-29

Applicant: Raytheon Technologies Corporation

Inventor： Paul R. Hanrahan

IPC: F02C7/06 ,  F01D25/16 ,  F01D25/22 ,  F02C3/04 ,  F16C17/02

Abstract: An assembly for rotational equipment includes a shaft, a first rolling-element bearing, a second rolling-element bearing, and a mid-shaft foil bearing. The shaft extends along a rotational axis between and to a first axial end and a second axial end. The shaft is configured for rotation about the rotational axis. The first rolling-element bearing is disposed at the first axial end. The second rolling-element bearing is disposed at the second axial end. The mid-shaft foil bearing is disposed axially between the first rolling-element bearing and the second rolling-element bearing.

公开(公告)号：US11905841B1

公开(公告)日：2024-02-20

申请号：US18105632

申请日：2023-02-03

Applicant: Raytheon Technologies Corporation

Inventor： Jorn A. Glahn ,  Collin P. Fitzgerald ,  Gregory M. Dooley

IPC: F01D25/22 ,  F01D25/16 ,  F02C7/06

CPC classification number: F01D25/22 ,  F01D25/16 ,  F02C7/06 ,  F05D2220/32

Abstract: A method of operation is provided during which buffer air flows into a buffer cavity in a turbine engine. The buffer cavity surrounds a bearing compartment in the turbine engine. Leakage air flows across a buffer seal device in the turbine engine. The buffer air and the leakage air are combined to provide combined air. The combined air is vented to a pressure sink such that: a pressure of the buffer air within the buffer cavity is maintained at or below a maximum buffer air threshold during operation of the turbine engine; and a flowrate of the leakage air across the buffer seal device is maintained at or above a minimum leakage air threshold during the operation of the turbine engine.

公开(公告)号：US20240011411A1

公开(公告)日：2024-01-11

申请号：US18254105

申请日：2021-11-22

Applicant: CLIMEON AB

Inventor： Per ASKEBJER ,  Fredrik ÖHRNELL

IPC: F01D15/10 ,  F01D25/22 ,  H02K49/10

CPC classification number: F01D15/10 ,  F01D25/22 ,  H02K49/106 ,  F05D2220/76 ,  F05D2240/53 ,  F05D2260/404

Abstract: A turbine (10) configured to operate in a thermodynamic cycle comprising a working fluid circuit, wherein the turbine comprises an impeller (11) mounted on a first end (20a) of a turbine shaft (20), the impeller being arranged in a housing (12) with a turbine inlet (10a) for the working fluid, wherein a second end (20b) of the turbine shaft is connectable to a shaft of a generator (60) by means of a magnetic coupling (40) for transferring torque from the turbine shaft to the generator shaft, wherein a fluid tight barrier (50) is mounted on the turbine, covering the turbine shaft to seal the turbine from the surroundings, wherein the turbine further comprises at least one fluid bearing (30a, 30b, 30c) arranged on the turbine shaft and in fluid communication with the working fluid circuit to receive working fluid therefrom.

公开(公告)号：US11732753B2

公开(公告)日：2023-08-22

申请号：US17979847

申请日：2022-11-03

Applicant: Stein Seal Company

Inventor： Glenn M. Garrison

IPC: F16J15/40 ,  F16C32/06 ,  F01D11/04 ,  F01D25/22 ,  F16J15/44

CPC classification number: F16C32/0662 ,  F01D11/04 ,  F01D25/22 ,  F16C32/0607 ,  F16C32/0625 ,  F16J15/40 ,  F16J15/441 ,  F16J15/442 ,  F05D2250/75 ,  F16C2360/23

Abstract: A circumferential seal assembly suitable for forming a thin film between a rotatable runner and a sealing ring is presented. The assembly includes an annular seal housing, a rotatable runner, an annular seal ring, and a plurality of groove structures. Each groove structure includes a groove and an optional feed groove. The groove includes at least two adjoining steps defined by base walls arranged to decrease depthwise. Two adjoining base walls are disposed about a base shoulder. Each base shoulder locally redirects a longitudinal flow to form an outward radial flow in the direction of the annular seal ring. The base walls are bounded by and intersect a pair of side walls. A side wall includes side shoulders which narrows the groove widthwise and locally redirects the longitudinal flow to form a lateral flow in the direction of the other side wall. Outward and lateral flows separately or in combination enhance stiffness of a thin-film layer between the annular seal ring and the rotatable runner.

公开(公告)号：US20230220872A1

公开(公告)日：2023-07-13

申请号：US17979847

申请日：2022-11-03

Applicant: Stein Seal Company

Inventor： Glenn M. Garrison

IPC: F16C32/06 ,  F16J15/40 ,  F01D25/22 ,  F16J15/44 ,  F01D11/04

CPC classification number: F16C32/0662 ,  F16C32/0607 ,  F16C32/0625 ,  F16J15/40 ,  F01D25/22 ,  F16J15/442 ,  F16J15/441 ,  F01D11/04 ,  F05D2250/75 ,  F16C2360/23

Abstract: A circumferential seal assembly suitable for forming a thin film between a rotatable runner and a sealing ring is presented. The assembly includes an annular seal housing, a rotatable runner, an annular seal ring, and a plurality of groove structures. Each groove structure includes a groove and an optional feed groove. The groove includes at least two adjoining steps defined by base walls arranged to decrease depthwise. Two adjoining base walls are disposed about a base shoulder. Each base shoulder locally redirects a longitudinal flow to form an outward radial flow in the direction of the annular seal ring. The base walls are bounded by and intersect a pair of side walls. A side wall includes side shoulders which narrows the groove widthwise and locally redirects the longitudinal flow to form a lateral flow in the direction of the other side wall. Outward and lateral flows separately or in combination enhance stiffness of a thin-film layer between the annular seal ring and the rotatable runner.

公开(公告)号：US11473448B2

公开(公告)日：2022-10-18

申请号：US16504242

申请日：2019-07-06

Applicant: General Electric Company

Inventor： Bugra Han Ertas

IPC: F01D25/22 ,  F16F13/00 ,  F02C7/06 ,  F16F15/023 ,  F16F15/02

Abstract: A bearing system including a frequency independent damper assembly and a bearing pad assembly. The damper assembly includes a housing, a plunger, a moving central post and a support spring. The plunger is movable within a housing to define a first primary damper cavity and a second primary damper cavity. The moving central post has defined therein a fluid channel for a pressurized working fluid flow. The support spring includes a plurality of flexible elements coupled to the housing and disposed radially outward of the first and second primary damper cavities. The support spring defines first and second accumulator cavity. A flow-through channel couples the first accumulator cavity to the second accumulator cavity. In an embodiment, the flow-through channel may be disposed within the moving central post. The bearing pad assembly includes a bearing pad including a plurality of bearing pad orifices coupled to the fluid channel in the moving central post.

公开(公告)号：US11149587B2

公开(公告)日：2021-10-19

申请号：US16353307

申请日：2019-03-14

Applicant: Nuovo Pignone Tecnologie—S.r.l.

Inventor： Giuseppe Sassanelli ,  Paola Di Festa ,  Giuseppe Iurisci ,  Francesco Cangioli ,  Roberto Marchi ,  Davide Biliotti

IPC: F01D25/16 ,  F01D1/04 ,  F01D1/08 ,  F01D1/02 ,  F01D17/16 ,  F01D25/22 ,  F01D5/06

Abstract: The combined radial-axial turboexpander (1) comprises a casing (3) and a shaft (5) arranged in the casing (3) for rotation therein. A radial impeller (25) and an axial expansion wheel (43) are mounted on the shaft (5). The axial expansion wheel (43) is arranged downstream of the radial impeller (25). A working fluid expands sequentially in the radial impeller and in the axial expansion wheel.

公开(公告)号：US10948014B2

公开(公告)日：2021-03-16

申请号：US16167708

申请日：2018-10-23

Applicant: Stein Seal Company

Inventor： Glenn M. Garrison

IPC: F16C32/06 ,  F01D11/04 ,  F01D25/22 ,  F16J15/44 ,  F16J15/40

Abstract: An intershaft seal assembly for maintaining separation between a piston ring and a pair of mating rings is presented. The assembly includes a piston ring interposed between forward and aft mating rings and a plurality of hydrodynamic grooves disposed along a sealing face of each mating ring. Each hydrodynamic groove further includes at least two adjoining steps wherein each step is defined by a base wall arranged to decrease depthwise in the direction opposite to rotation of an inner shaft. Two adjoining base walls define a base shoulder which locally redirects potion of a longitudinal flow within the groove to form an outward flow in the direction of the piston ring. Base walls are bounded by and intersect a pair of side walls with at least one side shoulder thereon which narrows the groove widthwise and locally redirects portion of the longitudinal flow to form a lateral flow from one side wall toward another side wall. Outward and lateral flows cooperate, with or without the longitudinal flow, to increase fluid pressure and maintain separation between the piston ring and the mating rings.

公开(公告)号：US20200208536A1

公开(公告)日：2020-07-02

申请号：US16800420

申请日：2020-02-25

Applicant: ECHOGEN POWER SYSTEMS, L.L.C.

Inventor： Brett BOWAN

IPC: F01D25/22 ,  F01K7/32 ,  F04D29/041 ,  F04D29/06 ,  F01D3/04 ,  F04D13/04 ,  F04D29/047 ,  F01K11/02 ,  F01K23/02 ,  F01K25/10 ,  F01D25/10 ,  F01D17/08 ,  F01D25/16 ,  F01D15/08

Abstract: Aspects of the invention disclosed herein generally provide a heat engine system, a turbopump system, and methods for lubricating a turbopump while generating energy. The systems and methods provide proper lubrication and cooling to turbomachinery components by controlling pressures applied to a thrust bearing in the turbopump. The applied pressure on the thrust bearing may be controlled by a turbopump back-pressure regulator valve adjusted to maintain proper pressures within bearing pockets disposed on two opposing surfaces of the thrust bearing. Pocket pressure ratios, such as a turbine-side pocket pressure ratio (P1) and a pump-side pocket pressure ratio (P2), may be monitored and adjusted by a process control system. In order to prevent damage to the thrust bearing, the systems and methods may utilize advanced control theory of sliding mode, the multi-variables of the pocket pressure ratios P1 and P2, and regulating the bearing fluid to maintain a supercritical state.