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특허 상세정보

Magnetic bearing back-up

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) H02K-007/09    H02K-007/08   
미국특허분류(USC) 310/905 ; 310/90
출원번호 US-0091189 (1993-07-14)
우선권정보 GB-0015691 (1992-07-23)
발명자 / 주소
출원인 / 주소
인용정보 피인용 횟수 : 27  인용 특허 : 0
초록

A back-up bearing (50, FIG. 1) is provided for a magnetic journal or thrust bearing by a source of pressurized fluid 52 (such as gas), channels 51 supplying the fluid to the suspension gap 30 between moving bearing armature 25 and stationary armature pole faces 281, 291, and magnet control means 56 responsive to a decrease in gap width at any point below an acceptable minimum to supply the fluid by way of the channel(s) to the gap to form a hydrostatic bearing between stationary and movable armatures to aid or replace the magnetic bearing support. In a j...

대표
청구항

A magnetic bearing arrangement for a rotatable shaft, including movable armature means movable with the shaft, stationary armature means forming with the movable armature means a magnetic circuit including a suspension gap between them, and back-up bearing means, the back-up bearing means including fluid channels communicating with the suspension gap, a source of pressurised fluid and back-up control means responsive to a detected inability of the magnetic bearing arrangement to suspend the shaft within a predetermined range of operational shaft position...

이 특허를 인용한 특허 피인용횟수: 27

  1. Lee, Yong Bok; Kim, Chang Ho; Kim, Seung Jong; Lee, Sang Hwa; Kim, Hee Soo. Airfoil-magnetic hybrid bearing and a control system thereof. USP2014078772992.
  2. Tecza, Joseph A.; Maier, William C.. Auxiliary bearing system for magnetically supported rotor system. USP2012118308364.
  3. Maier, William C.; Tecza, Joseph A.. Auxiliary bearing system with oil reservoir for magnetically supported rotor system. USP2013068465207.
  4. Tecza, Joseph A.. Auxiliary bearing system with oil ring for magnetically supported rotor system. USP2013048408806.
  5. Maier, William C.. Auxiliary bearing system with plurality of inertia rings for magnetically supported rotor system. USP2012108283825.
  6. Swann Michael K. (Gales Ferry CT) Shultz Richard R. (Groton CT). Axial vibration damping arrangement. USP1996115578881.
  7. Griffin, Daniel J.. Bearing assembly support and adjustment system. USP2013018353633.
  8. Krumme, Nils. CT scanner gantry with aerostatic bearing and segmented ring motor. USP2012108299670.
  9. Tecza, Joseph A.; Kidd, H. Allan. Circulating dielectric oil cooling system for canned bearings and canned electronics. USP2017019551349.
  10. Henry Mark S. ; Iannello Victor ; Pfaffenberger Eugene E. ; Burns Donald W.. Combination bearing for gas turbine engine. USP1999115977677.
  11. Nobuyuki Suzuki JP; Hiroyuki Yamada JP. Combined externally pressurized gas-magnetic bearing assembly and spindle device utilizing the same. USP2002046373156.
  12. Suzuki Nobuyuki,JPX ; Yamada Hiroyuki,JPX. Combined externally pressurized gas-magnetic bearing assembly and spindle device utilizing the same. USP2001096288465.
  13. Swann, Michael K.. Damper. USP2016089404556.
  14. Lund-lack Stephen Geoffrey (Eastburne GB3). Driver for levitation coils of a magnetic bearing. USP1997075649814.
  15. Nippes,Paul I.. Early warning and problem detection in rotating machinery by monitoring shaft voltage and/or grounding current. USP2006047034706.
  16. Heshmat, Hooshang; Swanson, Erik E.; Locke, Dennis H.; Walton, II, James F.. Hybrid foil-magnetic bearing with improved load sharing. USP2004086770993.
  17. Heshmat, Hooshang; Walton II, James F.. Hybrid foil-magnetic bearing with improved load sharing. USP2005116965181.
  18. Takahashi Naohiko,JPX ; Endo Tsunehiro,JPX ; Miura Haruo,JPX ; Yoshihara Minoru,JPX ; Fukushima Yasuo,JPX ; Takahashi Kazuki,JPX. Magnetic bearing, rotating machine mounting the same, and method for driving rotating machine. USP2000086111333.
  19. Griffin, Timothy R.; Gilarranz, Jose L.. Method for on-line detection of liquid and potential for the occurrence of resistance to ground faults in active magnetic bearing systems. USP2015038994237.
  20. Gilarranz, Jose L.; Griffin, Timothy R.. Method for on-line detection of resistance-to-ground faults in active magnetic bearing systems. USP2015059024493.
  21. Kiyoshi Sawada JP; Tomohiko Kawai JP. Pneumatic bearing motor. USP2002026344703.
  22. Robert Anthony Ress, Jr. ; Mark Stephen Henry. Pressure-assisted electromagnetic thrust bearing. USP2002046367241.
  23. Maier, Martin D.; Kidd, H. Allan. Segmented coast-down bearing for magnetic bearing systems. USP2014118876389.
  24. Paul I. Nippes. Shaft voltage current monitoring system for early warning and problem detection. USP2002106460013.
  25. Domberg Daniel ; Katsumata Shin. Stress relief in a magnetic thrust bearing. USP2000056057619.
  26. Maier, Martin D.; Kidd, H. Allan. Whirl inhibiting coast-down bearing for magnetic bearing systems. USP2014108851756.
  27. Rozmus,John J.. Wind generator system using attractive magnetic forces to reduce the load on the bearings. USP2008067391128.