Rolling piston and manufacturing method thereof for rotary type cold compressor

A technology of refrigeration compressors and rolling pistons, which is applied to rotary piston/oscillating piston pump components, machines/engines, mechanical equipment, etc., and can solve problems affecting the health of operators, complicated manufacturing processes, and high manufacturing costs. Achieve the effects of avoiding pollution and high energy consumption, low roughness, and small frictional resistance

A technology of refrigeration compressors and rolling pistons, which is applied to rotary piston/oscillating piston pump components, machines/engines, mechanical equipment, etc., and can solve problems affecting the health of operators, complicated manufacturing processes, and high manufacturing costs. Achieve the effects of avoiding pollution and high energy consumption, low roughness, and small frictional resistance

CN100520074CActive Publication Date: 2009-07-29NINGBO YONGWEI GROUP
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  • Rolling piston and manufacturing method thereof for rotary type cold compressor

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[0025] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0026] A rolling piston for a rotary refrigeration compressor, the piston material is a precision steel pipe after cold rolling of GCr15 bearing steel.

[0027] A method for manufacturing a rolling piston for a rotary refrigeration compressor, comprising the steps of:

[0028] (1) Select GCr15 bearing steel and cold-roll it into a precision steel pipe that meets the precision required by the rolling piston;

[0029] (2) Cutting the steel pipe to the required rolling piston ring material length by turning or milling;

[0030] (3) Heat treatment of rolling piston ring material with controllable gas;

[0031] (4) Rolling piston ring material rolling and deburring;

[0032] (5) Coarsely grinding each surface of the rolling piston ring material;

[0033] (6) Thermally stabilized rolling piston ring material:

[0034] (7) Finely grind each surf...

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Abstract

A rolling piston for a rotary refrigerating compressor and a manufacturing method thereof, wherein the rolling piston material is a precision steel pipe after cold rolling of GCr15 bearing steel, and the manufacturing method comprises the following steps: (1) selecting GCr15 bearing steel for cold rolling to conform to the rolling piston Steel pipes with required precision for inner diameter, outer diameter and thickness; (2) cutting steel pipes according to the length of the rolling piston material; (3) heat-treating the cut steel pipes with controllable gas; (4) coarsely grinding each surface of steel pipes; Chemically treated steel pipes; (6) Fine grinding all surfaces of steel pipes. The invention has the advantages that: the manufactured rolling piston has obvious advantages in wear resistance and high contact fatigue life. The cutting workload can be reduced by 50%, and the steel utilization rate can reach more than 90%, thus reducing the manufacturing cost. It also saves the casting method, avoids pollution to the environment and high energy consumption, and is a good method for energy saving and 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] ...

Claims

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Application Information

Patent Timeline
29 Jul 2009
Publication
CN100520074C
IPC
F04C29/00
Inventors
庄希平; 夏祖伟