Rolling piston and manufacturing method thereof for rotary type cold compressor

Abstract

The invention provides a rolling piston used for a rotary refrigeration compressor and the manufacture method thereof. The material of the rolling piston is a precise steel pipe made of GCr15 bearing steal cold rolled; the manufacture method of the invention is that (1) the GCr15 bearing steal is selected to be cold rolled to the steel pipe meeting required internal diameter, external diameter and thickness of the rolling piston; (2) the steel pipe is cut according to the length of the rolling piston material; (3) the cut steel pipe is disposed by hot controllable gas; (4) all surfaces of the steel pipe are kibbled; (5) the steel pipe is disposed by heat stabilization; (6) all surfaces of the steel pipe are finely grinded. The invention has the advantages that the made rolling piston has obvious predominance on the anti-wear performance and high contact fatigue life. The work load of the cutting process can be reduced by 50%, and the utilization ratio of the steel material can reach more than 90%, thus reducing the manufacture cost. The invention saves the casting method, avoids the environmental pollution and high energy consumption, and is a good energy-saving method with environmental protection.

Description

technical field [0001] The present invention relates to a rotary refrigeration compressor part and its manufacturing method. Background technique [0002] Rotary refrigeration compressor, also known as rolling rotor compressor, uses piston rotation to compress refrigerant gas. It has been on the market for more than 20 years, and it is one of the most commonly used compressors at present. [0003] The rolling piston is an important part of the rotary refrigeration compressor sleeve. It is set on the eccentric turn of the eccentric shaft of the compressor. It rolls along the cylinder wall during refrigeration. Contact, forming a dynamic seal, with the use of new environmentally friendly refrigerants, high efficiency, and energy saving in rotary compressors becoming more and more diversified, a more advanced proposal is made for rolling pistons that can be applied to severe conditions such as high load, high power, high temperature, and high pressure. high demands. [0004] ...

AI Technical Summary

Problems solved by technology

Rolling pistons are generally manufactured by die casting or continuous casting tubular methods. The tube body is cast first, then the material is cut, and then the inner hole, outer circle turning, peeling and grinding are carried out. Therefore, the cast tube body needs to leave more The amount, the utilization rate of piston material is only about 60%, the manufacturing process is complicated, and the manufacturing cost is high; also because the rolling piston is manufactured by casting method, a large amount of "three wastes" will be generated in the casting process, which seriously affects the environment and causes pollution, and the working environment is relatively poor. Poor, also affects the health of operators

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