发明名称 |
Vacuum pump |
摘要 |
A vacuum pump has a pump casing having a suction side where a suction port is located and a discharge side where a discharge port is located, a pump assembly housed in the pump casing and comprising a pair of pump rotors rotatable in synchronism with each other and having respective shafts, and a brushless direct-current motor mounted on the pump casing at a suction side of the pump casing. The motor has a pair of motor rotors comprising respective sets of permanent magnets which are mounted respectively on the shafts, a pair of cans surrounding outer circumferential and end surfaces of the motor rotors in sealing relation to the pump assembly, a motor stator mounted on the cans and housed in a water-cooled motor frame. <IMAGE> |
申请公布号 |
EP0733804(A3) |
申请公布日期 |
1997.05.14 |
申请号 |
EP19960104344 |
申请日期 |
1996.03.19 |
申请人 |
EBARA CORPORATION |
发明人 |
NAGAYAMA, MASAMI;USUI, KATSUAKI;MATAKE, KOZO;OJIMA, YOSHINORI;SATO, GENICHI;HISABE, YASUSHI |
分类号 |
F04C29/00;F04C29/04;H02K1/27;H02K5/128;H02K5/20;H02K5/24;H02K9/19;H02K9/22;H02K11/04;H02K16/02 |
主分类号 |
F04C29/00 |
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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