Title:
磁気軸受スピンドル
Document Type and Number:
Japanese Patent JP4176075
Kind Code:
B2
Abstract:
A magnetic bearing spindle comprises a radial magnetic bearing rotor (2) forming by laminating a ring-like plate made of electromagnetic steel sheet, an axial magnetic bearing rotor (3) made of magnetic material and a main shaft motor rotor (4), these rotors are fixed to the rotation shaft (1), and a plurality of electromagnets are disposed around the rotation shaft (1) at fine distances from one another. A counter-load-side bracket (17) is provided with a cooling air supply port (24), and an air passage (25) is provided in a frame (15). An outer diameter portion of the axial magnetic bearing rotor (3) is provided with a triangular portion (11). An outer diameter portion of an axial direction positioning collar (12) of an axial magnetic bearing stator (6) is provided with through holes (13) arranged in the radial direction at equal distances from one another. Cooling air is supplied from the through holes (13). With this configuration, a variation rate of a tube resistance when cooling air passes can be reduced, and it is possible to efficiently cool the rotation shaft (1), the axial magnetic bearing stator (6) and the like.
Inventors:
Akihiro Shimada
Application Number:
JP2004521108A
Publication Date:
November 05, 2008
Filing Date:
July 12, 2002
Export Citation:
Assignee:
Mitsubishi Electric Corporation
International Classes:
F16C37/00; B23Q1/70; B23Q5/10; B23Q11/12; F16C32/04; F16C39/06; H02K1/32; H02K7/09; H02K9/06
Domestic Patent References:
| JP8061366A | ||||
| JP9133133A | ||||
| JP11508674A | ||||
| JP8025173A | ||||
| JP5071533A | ||||
| JP1190231A | ||||
| JP2053516U |
Attorney, Agent or Firm:
Hiroaki Sakai