Plunger for compressor pump body, production method thereof as well as compressor and refrigeration equipment

A compressor pump and refrigeration equipment technology, applied in the field of compressors, can solve problems such as large loss of volumetric efficiency of the whole machine, compressor operation failures, and gap changes.

Inactive Publication Date: 2014-08-20
GUANGDONG MEIZHI PRECISION MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the clearance design of each matching size is large, it will cause a large loss of volumetric efficiency of the whole machine, and if the clearance design is small, it will cause changes in the actual clearance during operation, resulting in compressor failure
[0006] Insufficient wear resistance: There is rolling friction and sliding friction between the piston and other parts of the compressor pump body, which is one of the parts with the worst friction conditions among the parts of the compressor pump body. Wear-resistant material, but after long-term heavy-duty operation, it is often still the most severely

Method used

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  • Plunger for compressor pump body, production method thereof as well as compressor and refrigeration equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Preparation of pistons for compressor pump body, matching smelting raw materials: 1.8Kg of C; 1.3Kg of Si; 0.3Kg of Mn; 0.25Kg of Cu and 47Kg of iron, containing 0.05% by weight of P, 0.03% by weight The S. After mixing, heat in an induction furnace to melt at 1500-1520 degrees Celsius to obtain mixed molten iron; add 0.25Kg of rare earth zinc-magnesium-aluminum alloy to the mixed molten iron for vermicularization treatment; pour the vermisified mixed molten iron, In order to obtain crude pistons; the content ratio of pearlite and ferrite in the obtained crude pistons is (40-60): (60-40). The crude piston is further subjected to rough machining, heat treatment (quenching-tempering treatment) and finishing, so as to obtain a piston for a compressor pump body.

Embodiment 2

[0062] Prepare pistons for compressor pump body, select smelting raw materials: 1.6Kg of C, 1.0Kg of Si; 0.2g of Mn; 0.5Kg of Cu and 47Kg of iron, containing 0.3% by weight of P, 0.01% by weight of S . After mixing, heat to 1500-1520 degrees Celsius in an induction furnace to melt to obtain mixed molten iron; add 0.15Kg of rare earth zinc-magnesium-aluminum alloy to the mixed molten iron for vermicular treatment; cast the mixed molten iron after vermicular treatment , so as to obtain the crude piston; the content of pearlite in the obtained crude piston is 80-85%. The crude piston is further subjected to rough machining, heat treatment (quenching-tempering treatment) and finishing, so as to obtain a piston for a compressor pump body.

Embodiment 3

[0063] Example 3 Preparation of piston for compressor pump body, matching smelting raw materials: 1.9Kg of C, 1.5Kg of Si; 0.5Kg of Mn; 0.5Kg of Cu and 47Kg of iron, which contains 0.3% by weight of P, 0.06% by weight % of S. After mixing, heat in an induction furnace to melt at 1500-1520 degrees Celsius to obtain mixed molten iron; add 0.2Kg of rare earth zinc-magnesium-aluminum alloy to the mixed molten iron for vermicularization treatment; pour the vermisified mixed molten iron, In order to obtain crude pistons; the content of ferrite in the obtained crude pistons is 60-65%. The crude piston is further subjected to rough machining, heat treatment (quenching-tempering treatment) and finishing, so as to obtain a piston for a compressor pump body.

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PUM

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Abstract

The invention discloses a plunger for a compressor pump body, a production method thereof as well as a compressor and refrigeration equipment. The plunger for the compressor pump body is made from vermicular graphite cast iron, wherein the vermicular graphite cast iron contains the following components in percentage by weight: 3.2%-3.8% of C, 2.0%-3.0% of Si, 0.5%-1% of Mn, not higher than 1.0% of Cu, not higher than 0.3% of P, not higher than 0.06% of S and the balance of iron.

Description

technical field [0001] The invention relates to the field of compressors, in particular to a piston for a pump body of a compressor, a preparation method thereof, a compressor and refrigeration equipment. Background technique [0002] International and domestic major air-conditioning manufacturers generally use fully enclosed rolling piston rotary air-conditioning compressors. The pump body of the compressor includes cylinders, upper and lower bearings, pistons, sliding vanes and crankshafts, and the cylinder, upper and lower bearings, pistons and sliding vanes form a cavity for compressing refrigerant mixed gas. Due to the gap leakage of the pump body parts, suction and exhaust pressure loss and friction loss will have a great impact on the efficiency of the compressor, excessive wear between the parts will cause the performance of the compressor to decline significantly or even fail, and the above factors are related to the pump There is a great relationship between the m...

Claims

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Application Information

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IPC IPC(8): C22C37/04C22C37/10F04B39/00
Inventor 徐利华虞阳波苏建辉
Owner GUANGDONG MEIZHI PRECISION MFG
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