| 摘要 |
PURPOSE:To prevent malfunction of a vane and incomplete compression at start of a vane type compressor by feeding gas in a high pressure chamber into a vane back pressure chamber when starting under such condition as the differential pressure between high and low pressure sides is low. CONSTITUTION:Upon start of compressor under such condition as the differential pressure between high and low pressure sides is low, a vane 4 will spring out to lower the pressure in a vane back pressure chamber 17. Consequently, gaseous fluid will flow through a gas supply path 27 opening above a high pressure chamber 14 thus to assist spring out of the vane 4. Upon elapse of some interval, the differential pressure between high and low pressure sides will increase thus to increase the flow of gaseous fluid flowing from a path 31 through a first gas supply path 27 and to increase the hydraulic pressure to be applied onto a valve body 30. Consequently, the valve body 30 will seat in a valve seat 29 to interrupt between the path 21 and the gas supply path 27 thus to feed only high pressure oil in the oil path 18 into the vane back pressure chamber 17. |
