发明名称 |
Sealed magnetic fluid bearing for polygon mirror drive motor |
摘要 |
A motor provided with a magnetic fluid bearing device for suppressing vibration and irregular rotation as well as preventing the magnetic fluid from being scattered from a bearing portion and the inside of the motor. The motor includes a rotor having a polygon mirror mounted thereon, a stator unit having driving coils, a rotor position detector and a rotor revolution detector attached thereto, a magnetic fluid bearing unit having a magnetic seal and a dynamic pressure seal attached thereto and a magnetic bearing. A triple seal structure for magnetic fluid which includes a first fluid seal constituted by the seals of the bearing unit, a second fluid seal constituted by a magnet of the rotor and a third fluid seal constituted by a magnet of the seal magnet is provided in the motor.
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申请公布号 |
US5493161(A) |
申请公布日期 |
1996.02.20 |
申请号 |
US19940186166 |
申请日期 |
1994.01.25 |
申请人 |
HITACHI, LTD. |
发明人 |
UNO, SATOSI;AKASHI, SUEO;NII, KATSUTOSHI;KAWAIKE, KAZUHIKO;HIROYAMA, HIROO;ISHIZAKI, KOSHO |
分类号 |
F16C33/10;F16C39/06;H02K5/12;H02K5/124;H02K5/128;H02K5/16;H02K21/12;H02K29/06;(IPC1-7):H02K21/12;H02K15/03;H02K7/14;H02K7/08 |
主分类号 |
F16C33/10 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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