发明名称 |
Liquid injection type screw compressor with lubricant relief chamber |
摘要 |
A screw compressor has a male rotor and female rotor rotatably engaging each other in a casing. The male rotor has a radius R and Z-number of helical convex teeth, each of which is chamfered on a leading edge of an end facing the discharge end of casing to allow lubricating liquid to escape from a space between rotor teeth during discharge stages of operation. This prevents drastic increases in pressure upon the bearings due to a liquid compression phenomenon. Thrust forces produced by the liquid against a flat chamfer surface prevent scoring of the edges of the rotors and thus permit designs with narrow gaps between the rotors and the casing to improve the efficiency of the compressor.
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申请公布号 |
US5350286(A) |
申请公布日期 |
1994.09.27 |
申请号 |
US19920921910 |
申请日期 |
1992.07.29 |
申请人 |
KABUSHIKI KAISHA NAEKAWA SEISAKUSHO |
发明人 |
KISI, TAKAYUKI;KASAHARA, KEISUKE |
分类号 |
F04C18/08;F04C18/16;F04C29/00;(IPC1-7):F04C15/00 |
主分类号 |
F04C18/08 |
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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