| 摘要 |
PROBLEM TO BE SOLVED: To provide a screw compressor preventing oil from flowing in a suction side of a male rotor and a female rotor during displacement control of the compressor and capable of feeding oil to a meshing part without deteriorating compression performance from proximity of 100% of the compressor to arbitrary displacement (load) less than that. SOLUTION: A first oil passage 19 is formed on a casing 19, one end of the first oil passage 19 is communicated to an oil reservoir 17 and another end is opened in a slide valve chamber 10. A second oil passage 28 is formed on a slide valve 11, one end of the second oil passage 28 is opened to a mashing part of the male rotor and the female rotor 9 and another end is opened in another end opening side of the first oil passage 19. When compressor displacement is in proximity of 100%, another end opening of the first oil passage 19 communicates to another end opening part of the second oil passage 28. When compressor displacement is less than that, another end opening of the first oil passage 19 is blocked by a slide valve 21 or a guide part 15. COPYRIGHT: (C)2004,JPO&NCIPI
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