Set of rolling bearings and corresponding rotary machine
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F16C-019/18
F16C-019/54
F16C-039/02
F16C-027/04
F16C-032/04
F16C-035/07
F16C-041/00
F16C-035/073
F16C-035/06
출원번호
US-0378585
(2013-02-07)
등록번호
US-9309922
(2016-04-12)
우선권정보
FR-12 51308 (2012-02-13)
국제출원번호
PCT/EP2013/052396
(2013-02-07)
국제공개번호
WO2013/120755
(2013-08-22)
발명자
/ 주소
Delepine, Xavier
Lacour, Yves
출원인 / 주소
GE ENERGY POWER CONVERSION TECHNOLOGY LIMITED
대리인 / 주소
GE Global Patent Operation
인용정보
피인용 횟수 :
1인용 특허 :
2
초록▼
This set of roller bearings, which is a grounding bearing for a rotary machine, comprises a first-angular contact rolling bearing having a first outer race, a first inner race and first rolling elements, a second angular-contact rolling bearing having a second outer race, a second inner race and sec
This set of roller bearings, which is a grounding bearing for a rotary machine, comprises a first-angular contact rolling bearing having a first outer race, a first inner race and first rolling elements, a second angular-contact rolling bearing having a second outer race, a second inner race and second rolling elements, a mount in which the first angular-contact rolling bearing and the second angular-contact rolling bearing are mounted. The first outer race and the second outer race are arranged in the mount either directly one beside the other or via the interposition of an intermediate member, the axial stiffness of which is greater than that of the mount and than those of the first and second outer races. Application for example to asynchronous motors.
대표청구항▼
1. A roller bearing set consisting of a bearing block for a rotating machine, the roller bearing set comprising: a primary angular contact bearing with a primary external bushing, a primary internal bushing, and primary rolling elements;a secondary angular contact bearing with a secondary external b
1. A roller bearing set consisting of a bearing block for a rotating machine, the roller bearing set comprising: a primary angular contact bearing with a primary external bushing, a primary internal bushing, and primary rolling elements;a secondary angular contact bearing with a secondary external bushing, a secondary internal bushing, and secondary rolling elements; anda chassis, wherein the primary angular contact bearing and the secondary angular contact bearing are mounted on the chassis,wherein the primary external bushing and the secondary external bushing are positioned within the chassis, one immediately adjacent to the other. 2. The roller bearing set according to claim 1, wherein the primary internal bushing is in contact with the secondary internal bushing. 3. The roller bearing set according to claim 1, further comprising a housing, wherein the chassis is positioned within the housing, and the chassis is in contact with the housing, or a damper is in contact with the chassis and the housing. 4. The roller bearing set according to claim 1, further comprising a damper positioned around the chassis, wherein the radial stiffness of the damper is lower than the radial stiffness of the primary angular contact bearing and the secondary angular contact bearing. 5. The roller bearing set according to claim 4, wherein the damper is a corrugated sheet, wherein the corrugations of the corrugated sheet are circumferential or axial. 6. The roller bearing set according to claim 4, wherein the damper is a corrugated metal sheet, and the corrugations of the corrugated metal sheet are circumferential or axial. 7. The roller bearing set according to claim 1, wherein each of the primary external bushing and the secondary external bushing comprises a track defined by a semi-cylindrical track and a semi-toroid track. 8. The roller bearing set according to claim 7, further comprising an axial tightener configured to tighten the primary external bushing and the secondary external bushing axially toward the chassis, with the axial stiffness of the axial tightener under an axial force applied by the secondary external bushing less than or equal to the stiffness of the primary external bushing and the secondary external bushing under the axial force. 9. The roller bearing set according to claim 7, further comprising a damper positioned around the chassis, wherein the radial stiffness of the damper is lower than the radial stiffness of the primary angular contact bearing and the secondary angular contact bearing. 10. The roller bearing set according to claim 1, wherein the primary external bushing is in contact with the secondary external bushing. 11. The roller bearing set according to claim 10, wherein each of the primary external bushing and the secondary external bushing comprises a track defined by a semi-cylindrical track and a semi-toroid track. 12. The roller bearing set according to claim 10, wherein the primary internal bushing is in contact with the secondary internal bushing. 13. The roller bearing set according to claim 12, wherein each of the primary external bushing and the secondary external bushing comprises a track defined by a semi-cylindrical track and a semi-toroid track. 14. The roller bearing set according to claim 13, further comprising an axial tightener configured to tighten the primary external bushing and the secondary external bushing axially toward the chassis, with the axial stiffness of the axial tightener under an axial force applied by the secondary external bushing less than or equal to the stiffness of the primary external bushing and the secondary external bushing under the axial force. 15. The roller bearing set according to claim 14, further comprising a damper positioned around the chassis, wherein the radial stiffness of the damper is lower than the radial stiffness of the primary angular contact bearing and the secondary angular contact bearing. 16. The roller bearing set according to claim 1, further comprising an axial tightener configured to tighten the primary external bushing and the secondary external bushing axially toward the chassis, with the axial stiffness of the axial tightener under an axial force applied by the secondary external bushing less than or equal to the stiffness of the primary external bushing and the secondary external bushing under the axial force. 17. The roller bearing set according to claim 16, further comprising a damper positioned around the chassis, wherein the radial stiffness of the damper is lower than the radial stiffness of the primary angular contact bearing and the secondary angular contact bearing. 18. The roller bearing set according to claim 16, wherein the axial tightener comprises a fastener and a circular plate, and the axial stiffness of the fastener is lower than the axial stiffness of the primary external bushing, the secondary external bushing, and the circular plate by a factor of 10 or above. 19. The roller bearing set according to claim 18, further comprising a damper positioned around the chassis, wherein the radial stiffness of the damper is lower than the radial stiffness of the primary angular contact bearing and the secondary angular contact bearing. 20. An electric motor, comprising: a rotor shaft;a primary bearing comprising a magnetic bearing;a rolling bearing set comprising: a primary angular contact bearing with a primary external bushing, a primary internal bushing, and primary rolling elements;a secondary angular contact bearing with a secondary external bushing, a secondary internal bushing, and secondary rolling elements; anda chassis, wherein the primary angular contact bearing and the secondary angular contact bearing are mounted on the chassis,wherein the primary external bushing and the secondary external bushing are positioned within the chassis, one immediately adjacent to the other; anda secondary bearing supporting the rotor shaft when the primary bearing fails, wherein the rotor is mounted on the primary bearing making no contact with the secondary bearing.
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이 특허에 인용된 특허 (2)
Henry Mark S. ; Iannello Victor ; Pfaffenberger Eugene E. ; Burns Donald W., Combination bearing for gas turbine engine.
Falomi, Stefano; Bigi, Manuele; Fioravanti, Duccio; Mei, Luciano, Rotating machine with at least one active magnetic bearing and spaced auxiliary rolling bearings.
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