| 摘要 |
The rotor assembly of a pump, compressor, or like fluid flow machine, is provided with first passages connecting expanding and contracting working chambers successively with the high pressure and low pressure ports of a stationary valve plate at one end of the rotor assembly, and also with cylinder chambers at the other end of the rotor assembly, provided with pistons pressed against a rotary ring of a thrust bearing so that the rotor assembly is compressed, and pressed against the valve plate to reduce leakage. Other passages connect the high pressure and low pressure ports, and also additional control ports, successively with the inner ends of slot chambers for balancing the inward pressure exerted by the fluid in the working chambers on vanes in the slot chambers.
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