发明名称 |
Screw-spindle vacuum pump and method for operating it |
摘要 |
Screw-spindle vacuum pump with at least three closed-off feed chambers located one behind the other along each rotor and method for operating this compressor. The chamber which is last on the delivery side is brought virtually to the compression limit pressure by means of pre-admission, shortly before it opens towards the delivery side, by supplying a pre-admission stream which is at least five times as great as the intake mass stream. A precondition, in this case, is a minimum ratio of external compression to internal compression of five. |
申请公布号 |
ZA9804959(B) |
申请公布日期 |
1999.04.12 |
申请号 |
ZA19980004959 |
申请日期 |
1998.06.09 |
申请人 |
STERLING FLUID SYSTEMS (GERMANY) GMBH. |
发明人 |
HEINER KOESTERS;CHRISTIAN DAHMLOS |
分类号 |
F04C18/16;F04C25/02;F04C29/04 |
主分类号 |
F04C18/16 |
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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