Segmented coast-down bearing for magnetic bearing systems
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F16C-032/04
F16C-041/04
출원번호
US-0122241
(2012-03-30)
등록번호
US-8876389
(2014-11-04)
국제출원번호
PCT/US2012/031345
(2012-03-30)
§371/§102 date
20140402
(20140402)
국제공개번호
WO2012/166236
(2012-12-06)
발명자
/ 주소
Maier, Martin D.
Kidd, H. Allan
출원인 / 주소
Dresser-Rand Company
대리인 / 주소
Edmonds & Nolte, PC
인용정보
피인용 횟수 :
2인용 특허 :
299
초록▼
Coast-down bearing apparatus and methods are provided. The coast-down bearing includes a plurality of segments each having a radius of curvature substantially equal to an outer radius of a shaft and spaced radially therefrom to define a clearance, with the plurality of segments being configured to r
Coast-down bearing apparatus and methods are provided. The coast-down bearing includes a plurality of segments each having a radius of curvature substantially equal to an outer radius of a shaft and spaced radially therefrom to define a clearance, with the plurality of segments being configured to receive the shaft when a magnetic bearing drops the shaft. The coast-down bearing also includes a plurality of slots disposed between adjacent ones of the plurality of segments.
대표청구항▼
1. A coast-down bearing for use with a magnetic bearing system, comprising: a plurality of segments each having a radius of curvature substantially equal to an outer radius of a shaft, spaced radially therefrom, and defining a clearance between the plurality of segments and the shaft, the plurality
1. A coast-down bearing for use with a magnetic bearing system, comprising: a plurality of segments each having a radius of curvature substantially equal to an outer radius of a shaft, spaced radially therefrom, and defining a clearance between the plurality of segments and the shaft, the plurality of segments being configured to receive the shaft when a magnetic bearing drops the shaft, and at least one of the plurality of segments being tilted; anda plurality of slots disposed between adjacent ones of the plurality of segments. 2. The coast-down bearing of claim 1, wherein the clearance defines a maximum clearance proximal a mid-span of each of the plurality of segments and a minimum clearance being defined proximal at least one of a leading edge and a trailing edge of each of the plurality of segments. 3. The coast-down bearing of claim 1, wherein the at least one of the plurality of segments is tilted such that the at least one of the plurality of segments faces a circumferential direction opposite to a circumferential direction in which the shaft rotates. 4. The coast-down bearing of claim 1, wherein at least one of the plurality of segments defines a port extending radially therethrough and in fluid communication with a source of lubricant, hydraulic fluid, or both, and the clearance between the shaft and the plurality of segments. 5. The coast-down bearing of claim 1, further comprising a unitary body providing the plurality of segments and into which the plurality of slots are formed. 6. An apparatus for supporting a shaft during a coast-down, comprising a first coast-down bearing including first and second segments each disposed around the shaft, radially-offset therefrom, and defining a first clearance therebetween, the first and second segments defining a slot therebetween and each defining a radius of curvature that is substantially equal to an outer radius of the shaft, the first and second segments each being configured to receive the shaft during the coast-down, and at least one of the first and second segments being tilted. 7. The apparatus of claim 6, wherein the radius of curvature of at least one of the first and second segments extends from a locus that is offset from a center of the first coast-down bearing. 8. The apparatus of claim 7, wherein the first clearance between the shaft and the at least one of the first and second segments is at a minimum proximal the slot, and at a maximum proximal a mid-span of the at least one of the first and second segments. 9. The apparatus of claim 8, wherein the locus is radially-offset from the center by a distance that is substantially equal to the maximum clearance. 10. The apparatus of claim 6, wherein at least one of the first and second segments defines a port extending radially therethrough, the port being in fluid communication with the first clearance and with a source of lubricant, hydraulic fluid, or both. 11. The apparatus of claim 6, wherein the slot is substantially hemispherical in axial-cross section and the first coast-down bearing is unitary. 12. The apparatus of claim 6, further comprising a second coast-down bearing coaxially aligned with the first coast-down bearing and axially adjacent thereto, the second coast-down bearing comprising: third and fourth segments disposed around the shaft and radially separated therefrom by a second clearance; anda second slot defined by the third and fourth segments and disposed therebetween. 13. The apparatus of claim 12, wherein the second slot is axially-aligned with the first or second segment. 14. The apparatus of claim 13, wherein the second slot is axially-aligned with a mid-span of the first or second segment. 15. A method for supporting a shaft during coast-down, comprising: receiving the shaft with at least one of a plurality of bearing segments of a coast-down bearing after the shaft has been dropped by a magnetic bearing, to cause an initial impact on a bearing surface of the at least one of the plurality of bearing segments, the plurality of bearing segments being disposed around the shaft and spaced radially apart therefrom by a clearance, each of the plurality of bearing segments having a radius of curvature substantially equal to an outer radius of the shaft;distributing the initial impact over the at least one of the plurality of bearing segments by contacting the shaft with substantially all of the bearing surface of the at least one of the plurality of bearing segments; andtilting the plurality of bearing segments such that the plurality of bearing segments each face in a direction opposite to a direction of rotation of the shaft. 16. The method of claim 15, further comprising providing lubricant, hydraulic fluid, or both to the clearance via one or more ports, each of the one or more ports being defined in the at least one of the plurality of bearing segments. 17. The method of claim 15, further comprising: receiving the shaft with another one of the at least one of the plurality of bearing segments after the initial impact to cause a second impact; anddistributing the second impact over the another one of the at least one of the plurality of bearing segments by contacting the shaft with substantially all of a bearing surface of the another one of the least one of the plurality of bearing segments.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (299)
Afton Brian W. ; Samurin Norman A. ; Carpenter Hugh B., Adjustable compressor bundle insertion and removal system.
Holmes, Richard; Tryon, III, Robert G.; Pope, John E.; Nasser, Daniel A.; Oja, Michael; Dey, Animesh; Hamler, Jesse; Brooks, Jonathan; Tryon, James, Apparatus and methods for testing performance of a material for use in a jet engine.
Johnson Derek (Tempe AZ) Swapp Mavin C. (Gilbert AZ), Cantilever spring and method for temporarily coupling a semiconductor device to a transmission line using the cantilever.
Borgstr철m,Leonard; Carlsson,Claes G철ran; Franz챕n,Peter; Inge,Claes; Lagerstedt,Torgny; Moberg,Hans; Szepessy,Stefan, Centrifugal separator having a rotor and driving means thereof.
Clayton ; Jr. William (San Marino CA) Shchedrin Dmitry (Arcadia CA), Dynamometer for simulating the inertial and road load forces encountered by motor vehicles and method.
Lewis David W. (Charlottesville VA) Humphris Robert R. (Charlottesville VA) Maslen Eric H. (Charlottesville VA) Allaire Paul E. (Charlottesville VA) Williams Ronald D. (Charlottesville VA) Yates Stev, Magnetic bearing systems.
Lewis David W. (Charlottesville VA) Humphris Robert R. (Charlottesville VA) Maslen Eric H. (Charlottesville VA) Allaire Paul E. (Charlottesville VA) Williams Ronald D. (Charlottesville VA), Magnetic bearings for pumps, compressors and other rotating machinery.
Reitz,Donald D., Method and apparatus for accumulating liquid and initiating upward movement when pumping a well with a sealed fluid displacement device.
Nill Werner,CHX ; Mosbaek Johannessen,DKX, Method for delaying run-off of flash-storm water or ordinary rainwater from roofs and other surfaces with water-retenti.
Mitsch Matthew D. ; Streitman Lawrence R., Molded rubber valve seal for use in predetermined type valves, such as, a check valve in a regenerative desiccant air dr.
Takahashi Kazuki,JPX ; Miura Haruo,JPX ; Nishida Hideo,JPX ; Takahashi Naohiko,JPX, Multi-stage compressor having first and second passages for cooling a motor during load and non-load operation.
Utter Robert E. (Whitehouse TX) Wall S. Boyd (Tyler TX) Singletary Charles A. (Whitehouse TX) Fields Gene M. (Bristol TN) Hill Joe T. (Bristol VA) Williams John R. (Bristol TN), Oil separation and bearing lubrication in a high side co-rotating scroll compressor.
Douma Jan A.,NLX ; Wijma Willem S.,NLX, Separator device provided with a cyclone chamber with a centrifugal unit, and vacuum cleaner provided with such a separator device.
Nyilas Charles P. ; Campen ; Jr. Clifford H. ; Kujawski Joseph M., Sub-sea pumping system and an associated method including pressure compensating arrangement for cooling and lubricating.
Nyilas Charles P. ; Campen ; Jr. Clifford H. ; Kujawski Joseph M., Sub-sea pumping system and associated method including pressure compensating arrangement for cooling and lubricating.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.