发明名称 |
Oil free screw compressor |
摘要 |
An oil free screw compressor includes a compressor main body directly connected to a high speed motor via a drive side gear and a driven side gear having a uniform speed ratio. A bearing in a side of the high speed motor employs one having the same size as that of a bearing in a side of the compressor main body. The same material as a viscous seal provided at both end portions of a male rotor and a female rotor is used for a viscous seal provided at both end portions of a motor shaft. The high speed motor is driven by a high frequency type inverter. The electric motor side and the compressor main body side are made in a rotational shaft structure which is dummy symmetrical about a uniform gear portion.
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申请公布号 |
US6471492(B2) |
申请公布日期 |
2002.10.29 |
申请号 |
US20010828199 |
申请日期 |
2001.04.09 |
申请人 |
HITACHI, LTD. |
发明人 |
NISHIMURA HITOSHI;SUZUKI AKIRA |
分类号 |
F04C2/00;F04C18/16;F04C23/00;F04C28/06;F04C28/08;F04C29/00;F04C29/04;(IPC1-7):F04B49/00 |
主分类号 |
F04C2/00 |
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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