| 摘要 |
PURPOSE:To prevent the wear between the outer periphery of a roller and the tip of a blade by applying the pressure of compressed gas on the back of the blade. CONSTITUTION:A blade back-pressure chamber 13 which is sealed from the inside of a sealed case is formed on the back side of a blade 2 in the cylinder 8 of a rotary compressor. A blade spring 14 is provided in this back-pressure chamber 13 so as to forcibly bring the blade 12 into contact with a roller 10. A pressure introducing hole 31 is drilled through the blade 12, and one end of this pressure introducing hole 31 is opened on the blade back-pressure chamber 13 side and the other end is opened on the high-pressure chamber side of a compression chamber 9. The back pressure on the blade 12 is thereby reduced compared to the case in which no pressure introducing hole is provided, so each sliding part can be prevented from wearing and its sliding resistance can be also reduced. |
