ELECTRICAL MACHINE HAVING A CONDUCTIVE LAYER

    公开(公告)号:US20220329135A1

    公开(公告)日:2022-10-13

    申请号:US17712304

    申请日:2022-04-04

    申请人: AKTIEBOLAGET SKF

    IPC分类号: H02K11/40 H02K7/08 H02K5/173

    摘要: An electrical machine includes a non-rotating part, a rotating part, at least one bearing that includes a rotating ring and a non-rotating ring and supports the rotating part, a grounding brush fixed and secured to the non-rotating part, and having a free end extending towards the rotating ring of the bearing, and a conductive layer covering a portion of a surface of the rotating ring of the bearing such that the free end of the grounding brush is in contact with the conductive layer.

    COMBINED INSULATOR AND CONDUCTOR ASSEMBLY FOR BEARINGS WITH ADJUSTABLE CONDUCTOR

    公开(公告)号:US20210310518A1

    公开(公告)日:2021-10-07

    申请号:US17210168

    申请日:2021-03-23

    申请人: AKTIEBOLAGET SKF

    IPC分类号: F16C19/52 F16C19/16 F16C33/12

    摘要: A combined electrical insulator and conductor assembly for a bearing disposable between a shaft and a housing includes an annular insulator disposable about the bearing outer ring and configured to prevent electric current flow between the outer ring and the housing and including a plurality of projections extending axially along and spaced circumferentially about a centerline. A conductor includes a conductive disk with an outer radial end engageable with the housing inner surface, an inner radial end defining a central opening for receiving the shaft and openings each receiving a separate one of the plurality of projections of the insulator such that the disk is axially displaceable relative to the insulator. An annular conductive brush subassembly is coupled with the conductive disk and includes a plurality of electrically conductive fibers contactable with the shaft outer surface so as to provide a conductive path between the shaft and the disk.

    Insulating device for a bearing
    7.
    发明授权

    公开(公告)号:US11698106B2

    公开(公告)日:2023-07-11

    申请号:US17557321

    申请日:2021-12-21

    申请人: Aktiebolaget SKF

    摘要: An insulating device for a bearing mountable within a housing, the bearing having an inner ring and an outer ring with an outer circumferential surface and opposing axial ends and a plurality of rolling elements disposed there between. The insulating device comprises: a first annular part, which is adapted to be in contact to the outer circumferential surface of the outer ring, and a second annular part, which is also adapted to be in contact to the outer circumferential surface of the outer ring. The first and second part form the insulation device which is adapted to contact, in an assembled state of the bearing in the housing, both the outer ring and the housing. The first part is thermally conductive and electrically insulating and the second part is electrically insulating and less thermally conductive than the first part or is not thermally conductive.

    Combined insulator and conductor assembly for bearings with prong-locked conductor

    公开(公告)号:US11549556B2

    公开(公告)日:2023-01-10

    申请号:US17329375

    申请日:2021-05-25

    申请人: AKTIEBOLAGET SKF

    IPC分类号: F16C41/00 F16C19/06

    摘要: A combined insulator and conductor assembly is for a bearing disposable between a shaft and a housing and includes an annular insulator disposeable about the bearing outer ring. The insulator is configured to prevent electric current flow between the outer ring and the housing and includes one or more axial mounting tabs. An electrical conductor has an outer radial end, an inner radial end and at least one retainer, the at least one retainer being engageable with the at least one mounting tab to releasably couple the conductor with the insulator. Each retainer includes a radially-extending prong engageable with a separate tab. The conductor outer radial end or/and a portion of the conductor between the outer and inner ends is conductively engageable with the housing and the conductor inner radial end being conductively engageable with the shaft so as to provide a conductive path between the shaft and the housing.

    Combined insulator and conductor assembly for bearings with fixed conductor

    公开(公告)号:US11486445B2

    公开(公告)日:2022-11-01

    申请号:US17210139

    申请日:2021-03-23

    申请人: AKTIEBOLAGET SKF

    IPC分类号: F16C41/00 F16C19/16

    摘要: A combined electrical insulator and conductor assembly for a bearing disposable between a shaft and a housing includes an annular insulator disposable about the bearing outer ring and configured to prevent electric current flow between the outer ring and the housing and including projections extending axially along and spaced circumferentially about a centerline. A conductor preferably includes a conductive disk with an outer radial end engageable with the housing inner surface, an inner radial end defining a central opening for receiving the shaft and openings each receiving a separate one of the plurality of projections of the insulator such that the disk is axially fixed relative to the insulator. An annular conductive brush subassembly is coupled with the conductive disk and includes a plurality of electrically conductive fibers contactable with the shaft outer surface so as to provide a conductive path between the shaft and the disk.

    COMBINED INSULATOR AND CONDUCTOR ASSEMBLY FOR BEARINGS WITH ENCASED INSULATOR

    公开(公告)号:US20210310520A1

    公开(公告)日:2021-10-07

    申请号:US17184137

    申请日:2021-02-24

    申请人: AKTIEBOLAGET SKF

    IPC分类号: F16C41/00

    摘要: A combined insulator and conductor assembly for a bearing disposable between a shaft and a housing includes an annular insulator disposeable about the bearing outer ring and having inner and outer circumferential surfaces and formed of an electrically insulative material or having one or more insulative layers to prevent electric current flow between the outer ring and the housing. A conductive carrier includes a cylindrical portion having an inner surface disposed about the insulator outer surface and an outer surface disposeable against the housing inner surface and a disk portion extending radially inwardly from the cylindrical portion having an inner radial end spaced outwardly from the shaft. An annular conductive brush subassembly is coupled with the carrier disk portion and includes a plurality of electrically conductive fibers contactable with the shaft outer surface to provide a conductive path between the shaft and the carrier, and thereafter to the housing.