Quasi-elliptic rolling piston and rolling piston compressor

Abstract

The invention relates to a quasi-elliptic rolling piston and a rolling piston compressor. The quasi-elliptic rolling piston has a profile formed by combining a plurality of molded lines; the center ofmass coincides with a main shaft; a piston body is concentric with a cylinder; compared with a circular rolling piston, the quasi-elliptic rolling piston has a greater radius of curvature at a contact point with the cylinder, the up-and-down motion rate of a sliding sheet can be reduced in the exhaust process, and the friction angles between the quasi-elliptic rolling piston and the cylinder andbetween the quasi-elliptic rolling piston and the sliding sheet can be reduced; and the radiuses of curvature of the molded lines of various portions at the combined and connected parts are the same.The rolling piston compressor comprises the cylinder; the piston is arranged in a cavity of the cylinder; the piston is fixedly connected with the main shaft and driven to make rotary motion by the main shaft; the sliding sheet capable of being in close contact with the piston all the time is arranged on the inner wall of a cavity of the cylinder; the sliding vane is supported by a sliding sheet spring; an air inlet hole and an exhaust hole are formed in cylinder end covers at the two ends of a casing; and an exhaust valve is arranged on the exhaust hole. Friction and leakage of the piston canbe reduced, and the size and mass of the piston are increased.

Description

technical field [0001] The invention relates to the field of compressors, in particular to an elliptical rolling piston and a rolling piston compressor. Background technique [0002] Rolling piston compressor is also called rolling rotor compressor. Due to the rapid development of modern processing technology, the technology of rolling piston compressors is also becoming more and more perfect. Especially after the 1970s, the proportion of rolling piston compressors in small hermetic refrigeration compressors is increasing. As a positive displacement compressor, the rolling piston compressor uses a rotating rotor, a cylinder, and a sliding vane to form a periodically changing airtight volume chamber to compress the gas. Compared with the reciprocating compressor, its volume can be reduced by 40% to 50%, its weight is 50% lighter, and its wearing parts can be reduced by 35% to 40%. It can also be used to transport dirty and process gases with liquid droplets and dust. There...

AI Technical Summary

Problems solved by technology

However, the circular rolling piston between the sliding vane and the rotor of the traditional rolling piston compressor causes the relative movement speed and gap between the sliding vane to increase, which will cause large leakage and friction problems, which will greatly reduce the performance of the machine.

And the traditional rolling piston compressor cannot be made into a large compressor due to the balance quality problem

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