| 摘要 |
PURPOSE:To prevent reverse turning of a rotor in a transmission unit which slides in contact with a rotor shaft end by rotating a switch valve and preventing lubricating oil from flowing back into a cylinder. CONSTITUTION:During operation, a rotor 1 and a push board 22 slide with each other and oil passages 18-20 are held connected to each other. When a compressor stops, the rotor 1 moves back a little due to the pressure difference in a cylinder 2. At this time, a switch valve 16 also moves back, and the oil passage 19 is closed, by coming out of the connecting position with the oil passages 18 and 20. As a result, any high pressure lubricating oil does not flow into the cylinder 2 so that the reverse turning of the rotor 1 can be prevented. |
