公开(公告)号：US20230304505A1

公开(公告)日：2023-09-28

申请号：US18122901

申请日：2023-03-17

Applicant: AKTIEBOLAGET SKF

Inventor： Gregory HOFMANN ,  Hans WALLIN ,  Benkui XIA ,  Jingwen ZHANG

IPC: F04D29/06 ,  F16C19/18 ,  F04D25/06

CPC classification number: F04D29/06 ,  F16C19/18 ,  F04D25/06 ,  F16C2360/44

Abstract: A bearing assembly includes a first bearing unit and a second bearing unit for supporting a shaft, in particular a rotor shaft within a centrifugal compressor in which an axial load acts on the shaft in a first or a second axial direction, the second axial direction being opposite to the first axial direction. When the axial load acts in the first axial direction, the first bearing unit is configured to support both an axial load and a radial load and the second bearing unit is configured to support a radial load. Alternatively, when the axial load acts in the second axial direction, the first bearing unit is configured to support a radial load and the second bearing unit is configured to support both an axial load and a radial load.

公开(公告)号：US20240167510A1

公开(公告)日：2024-05-23

申请号：US18083062

申请日：2022-12-16

Applicant: AKTIEBOLAGET SKF

Inventor： Rudolf HAULEITNER ,  Alexander MOCNIK ,  Hans WALLIN

IPC: F16C33/38 ,  F16C19/06

CPC classification number: F16C33/3862 ,  F16C19/06

Abstract: A two-part bearing cage for a rolling bearing includes a first cage part and a second cage part. Each cage part includes an annular base body with a plurality of bars extending axially from the annular base body and/or a plurality of complementarily designed bar receptacles. The bars of one cage part engage in the bar receptacles of the other cage part to form cage bars for defining cage pockets configured to receive the rolling elements of the rolling bearing. Each bar includes a claw and each bar receptacle includes a connection portion such that each connection portion and its corresponding claw form a snap joint.

公开(公告)号：US20240384753A1

公开(公告)日：2024-11-21

申请号：US18317322

申请日：2023-05-15

Applicant: AKTIEBOLAGET SKF

Inventor： Gregory HOFMANN ,  Hans WALLIN ,  Benkui Xia ,  Jingwen Zhang

IPC: F16C19/18

Abstract: A bearing assembly is for supporting a shaft in a housing, preferably a rotor shaft of a centrifugal compressor. The bearing assembly includes at least a first bearing pair including a first rolling bearing and a second rolling bearing arranged back to back, each one of the first and second rolling bearings including an inner ring attached to the shaft, an outer ring and a plurality of rolling elements disposed between the inner ring and the outer ring. A radial gap is provided between the outer ring of the first rolling bearing and the housing and the outer ring of the second rolling bearing is in contact with the housing. Preferably, a fixing element restricts axial movement of the outer ring of the first rolling bearing with respect to the housing.

公开(公告)号：US20240280300A1

公开(公告)日：2024-08-22

申请号：US18110980

申请日：2023-02-17

Applicant: AKTIEBOLAGET SKF

Inventor： Rudolf HAULEITNER ,  Hans WALLIN

IPC: F25B31/00 ,  F25B41/26 ,  F25B49/00

CPC classification number: F25B31/004 ,  F25B41/26 ,  F25B49/005 ,  F25B2500/16

Abstract: A cooling system includes a refrigerant cycle having a compressor unit for compressing gaseous refrigerant, a condenser unit for condensing gaseous refrigerant to liquid refrigerant, an optional economizer unit for reducing pressure of the refrigerant and partially evaporating the liquid refrigerant, and an evaporator unit for evaporating the liquid refrigerant to gaseous refrigerant. The refrigerant is cycled from the compressor unit to the condenser unit, from the condenser unit to evaporator unit, and back to the compressor unit. The compressor unit includes at least one bearing assembly and a lubrication cycle providing liquid refrigerant to lubricate the bearing assembly. The lubrication cycle has a lubricating refrigerant supply line, branched from the condenser unit or from the economizer unit to the bearing assembly, and connected to an injection device(s) for introducing lubricating refrigerant into the bearing assembly. A vapor separating unit separates gaseous lubricating refrigerant from liquid phase lubricating refrigerant.

公开(公告)号：US20240352971A1

公开(公告)日：2024-10-24

申请号：US18136833

申请日：2023-04-19

Applicant: AKTIEBOLAGET SKF

Inventor： Rudolf HAULEITNER ,  Alexander MOCNIK ,  Hans WALLIN ,  Magnus ARVIDSSON

IPC: F16C33/38 ,  F16C19/06

CPC classification number: F16C33/3862 ,  F16C19/06 ,  F16C33/3868 ,  F16C33/3875 ,  F16C2204/20 ,  F16C2208/60 ,  F16C2326/01

Abstract: A rolling-element bearing cage having a central axis of rotation includes a first cage ring having an axial extension and at least one snap arm disposed directly on the extension, and a second cage ring having an attachment region to which the at least one snap arm is snapped. The attachment region is located at a first distance from the central axis of rotation. A portion of each of the at least one each snap arm of the first cage ring is located at a second distance from the central axis of rotation, the second distance being less than the first distance.

公开(公告)号：US20240167511A1

公开(公告)日：2024-05-23

申请号：US17991102

申请日：2022-11-21

Applicant: AKTIEBOLAGET SKF

Inventor： Rudolf HAULEITNER ,  Alexander MOCNIK ,  Hans WALLIN

IPC: F16C33/38

CPC classification number: F16C33/3875 ,  F16C2208/36 ,  F16C2208/60

Abstract: A two-part bearing cage for a rolling bearing includes a first cage part and a second cage part. Each cage part includes an annular base body with a plurality of bars extending axially from the annular base body and/or a plurality of complementarily designed bar receptacles. The bars of one cage part engage in the bar receptacles of the other cage part to form cage bars for defining cage pockets configured to receive the rolling elements of the rolling bearing. Each bar includes a claw and each bar receptacle includes a connection portion such that each connection portion and its corresponding claw form a snap joint.