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A Pore Treatment Method for Powder Metallurgy Connecting Rod of Refrigerator Compressor

A refrigerator compressor, powder metallurgy technology, applied in mechanical equipment, machine/engine, liquid variable capacity machinery, etc., can solve the problem of compressor startup stuck, stuck between connecting rod and crankshaft, piston and cylinder mating surface and other problems, to achieve the effect of easy operation, low cost and improved quality

Inactive Publication Date: 2019-12-31
HUBEI POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the processing of parts, these pores will absorb impurities in the process (such as processing coolant, cleaning fluid, oil, etc.) due to capillary phenomenon. After long-term storage, these impurities will ooze out. Bond with the lubricating oil in the compressor to form a highly viscous semi-solid mixed substance. These seeped mixed substances seriously affect the relative movement between the moving parts. Once the compressor is started, these mixed substances will be stuck in the connection. Between the rod and the crankshaft, the piston and the cylinder block, causing the compressor to start stuck

Method used

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  • A Pore Treatment Method for Powder Metallurgy Connecting Rod of Refrigerator Compressor
  • A Pore Treatment Method for Powder Metallurgy Connecting Rod of Refrigerator Compressor
  • A Pore Treatment Method for Powder Metallurgy Connecting Rod of Refrigerator Compressor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A method for treating pores of a powder metallurgy connecting rod of a refrigerator compressor, comprising the following steps:

[0033] S1. Dry cutting the blank of the powder metallurgy connecting rod to expose the pores of the powder metallurgy connecting rod;

[0034] S2. Apply activated carbon powder to the surface of the powder metallurgy connecting rod, and use a brush to make the activated carbon powder enter the pores;

[0035] S3, immerse the powder metallurgy connecting rod obtained in S2 in lubricating oil and place it at 10 degrees for no less than 7 days, so that the pores of the powder metallurgy connecting rod are filled with lubricating oil;

[0036] S4. Take the powder metallurgy connecting rod out of the lubricating oil, and heat the powder metallurgy connecting rod to 90 degrees, so that the air contained in the pores in the powder metallurgy connecting rod is emptied;

[0037] S5. Then cool the powder metallurgy connecting rod naturally. When the s...

Embodiment 2

[0041] A method for treating pores of a powder metallurgy connecting rod of a refrigerator compressor, comprising the following steps:

[0042] S1. Dry cutting the blank of the powder metallurgy connecting rod to expose the pores of the powder metallurgy connecting rod;

[0043] S2. Apply activated carbon powder to the surface of the powder metallurgy connecting rod, and use a brush to make the activated carbon powder enter the pores;

[0044] S3, immerse the powder metallurgy connecting rod obtained in S2 in lubricating oil and place it at 15 degrees for no less than 7 days, so that the pores of the powder metallurgy connecting rod are filled with lubricating oil;

[0045] S4. Take the powder metallurgy connecting rod out of the lubricating oil, and heat the powder metallurgy connecting rod to 95 degrees, so that the air contained in the pores in the powder metallurgy connecting rod is emptied;

[0046] S5. Then cool the powder metallurgy connecting rod naturally. When the s...

Embodiment 3

[0050] A method for treating pores of a powder metallurgy connecting rod of a refrigerator compressor, comprising the following steps:

[0051]S1. Dry cutting the blank of the powder metallurgy connecting rod to expose the pores of the powder metallurgy connecting rod;

[0052] S2. Apply activated carbon powder to the surface of the powder metallurgy connecting rod, and use a brush to make the activated carbon powder enter the pores;

[0053] S3, immerse the powder metallurgy connecting rod obtained in S2 in lubricating oil and place it at 20 degrees for no less than 7 days, so that the pores of the powder metallurgy connecting rod are filled with lubricating oil;

[0054] S4. Take the powder metallurgy connecting rod out of the lubricating oil, and heat the powder metallurgy connecting rod to 100 degrees, so that the pores in the powder metallurgy connecting rod contain air to be emptied;

[0055] S5. Then cool the powder metallurgy connecting rod naturally. When the surface...

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PUM

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Abstract

The invention proposes a pore treatment method for a powder metallurgy connecting rod of a refrigerator compressor. Less than 7 days; heat the powder metallurgy connecting rod to make the pores in the powder metallurgy connecting rod empty; naturally cool the powder metallurgy connecting rod, immerse the powder metallurgy connecting rod in lubricating oil again, and dry the powder The metallurgical connecting rod is air-cooled, then immersed in oil for 2-4 days; then the powder metallurgy connecting rod is finished; after the finishing treatment is completed, it is oil washed, oiled, and oil-immersed for 2-4 days to make the surface of the part An oil film is formed and the part can then be assembled into the compressor. The invention ensures that the compressor can be turned on normally after being placed for a long time, and avoids the phenomenon of being stuck or difficult to start, thereby ensuring the service life and reliability of the refrigerator compressor.

Description

technical field [0001] The invention relates to the technical field of refrigerator accessories, in particular to a method for treating pores of a powder metallurgy connecting rod of a refrigerator compressor. Background technique [0002] The compressor is one of the core components in the refrigerator and plays a vital role in the normal operation of the refrigerator. The compressor is known as the "heart" of the refrigerator. Compared with castings, powder metallurgy connecting rods are widely used as parts of refrigerator compressors, such as connecting rods and pistons, due to their advantages of low cost, excellent performance, high product precision and good stability. [0003] In actual production, the powder metallurgy connecting rod is assembled into the compressor after processing. Due to the long storage and transportation time of the compressor, after a long period of storage, the compressor may be stuck or difficult to start, resulting in The failure of the c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04B39/00F04B39/02B22F5/00
CPCB22F5/00F04B39/0022F04B39/02
Inventor 蔺绍江戴竟雄肖建华何国庚
Owner HUBEI POLYTECHNIC UNIV