Rolling piston for refrigeration compressor and manufacturing method thereof

A technology of refrigeration compressors and rolling pistons, which is applied to rotary piston/oscillating piston pump components, machines/engines, rotary piston pumps, etc. It can solve the problems of affecting the health of operators, complex manufacturing process, and high manufacturing cost. problem, to achieve good processability, cost saving, and low price

Active Publication Date: 2015-11-11
NINGBO YONGWEI GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Rolling piston for refrigeration compressor and manufacturing method thereof

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Embodiment Construction

[0028] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0029] A rolling piston for a rotary refrigeration compressor, the piston material is a steel pipe after carburizing steel cold rolling.

[0030] The material of the rolling piston is steel pipe after carburizing steel cold rolling.

[0031] In this embodiment, the chemical composition of the carburizing steel is as follows in % by weight: C0.17-0.23Si0.17-0.37Mn0.90-1.20Cr0.90-1.20Fe balance. Specifically: 20CrMn.

[0032] In another embodiment, the chemical composition of the carburizing steel is as follows by weight %: C0.17˜0.23Si0.17˜0.37Mn0.80˜1.10Cr1.00˜1.30Ti0.04˜0.10Fe, balance. Specifically: 20CrMnTi.

[0033] A method for manufacturing a rolling piston for a rotary refrigeration compressor, comprising the steps of:

[0034] (1) Select carburized steel and cold roll it into a steel pipe that meets the precision required by the ro...

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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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04C29/00F04C18/356B23P15/10
Inventor 庄希平夏祖伟林国富
Owner NINGBO YONGWEI GROUP
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