| 摘要 |
PURPOSE:To prevent abrasion of vane and increase of input of compressor, by providing a solenoid valve closable during high speed operation of the compressor in a pressure lead-in path which operates a valve for opening/closing a lubrication path between a vane back pressure chamber and a high pressure chamber thereby preventing application of excessive pressure onto the back of vane. CONSTITUTION:A valve comprising a ball seat 20, a ball member 21 and a plunger 23 is provided in a lubrication path 18 communicating between a vane back pressure chamber 17 and an oil sump at the lower section of a high pressure chamber 14. A pressure lead-in path 24 communicated through a pressure lead-in path 24 with an operating chamber located immediately before the delivery is communicated with the back section of the plunger 23, and a solenoid valve 26 for opening/closing the lead-in path 24 is provided in the way of said pressure lead path 24. The solenoid valve 26 is constructed to function corresponding with the rotation of compressor and to close the pressure lead-in path 24 when the rotation exceeds over a predetermined level. Upon closure of the pressure lead-in path 24, the plunger 23 moves downward and the lubrication path 18 is closed by the ball member 21, thereby the vane back pressure lowers thus preventing abrasion of vane and increase of input of the compressor. |
