A kind of rolling piston for refrigeration compressor and its manufacturing method

Abstract

Provided is a rolling piston for a rotary type refrigeration compressor. The rolling piston is made of a steel tube which is formed by conducting cold-rolling on carburizing steel. Chemical components of the carburizing steel include 0.17%-0.23% of C, 0.17%-0.37% of Si, 0.80%-1.10% of Mn, 1.00%-1.30% of Cr, 0.04%-0.10% of Ti and the balance Fe. The rolling piston has the advantages that the supply of goods is ample, the price is low, the cost is reduced, and the environment is not polluted.

Description

technical field [0001] The invention relates to a refrigeration compressor component and a manufacturing method thereof. Background technique [0002] Rotary refrigeration compressors, also known as rolling rotor compressors, use piston rotation to compress refrigerant gas. It has been on the market for many 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] For a long ...

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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