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Self-decompression valve mechanism and low temperature refrigerator adopting self-decompression valve mechanism

A technology for low-temperature refrigerators and gas distribution mechanisms, which is applied to gas cycle refrigerators, refrigerators, compressors, etc., and can solve problems such as large positive pressure, wear of rotary valves, and reduced reliability of equipment, so as to reduce positive pressure and prolong Service life, effect of reducing plane wear

Active Publication Date: 2018-09-11
CSIC PRIDE (NANJING) CRYOGENIC TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the high-pressure air hole 62 and the air hole 63 of the air distribution valve 6 have certain size and position requirements, so that the outer diameter D1 of the air distribution valve 6 cannot be too small, otherwise the high-pressure air hole 62 and the air hole 63 of the air distribution valve cannot be made.
In this way, the positive pressure of the joint is relatively large, and long-term operation will cause wear on the contact surface of the rotary valve 7 and the gas distribution valve 6, which will affect the performance of the equipment and reduce the reliability of the equipment.

Method used

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  • Self-decompression valve mechanism and low temperature refrigerator adopting self-decompression valve mechanism
  • Self-decompression valve mechanism and low temperature refrigerator adopting self-decompression valve mechanism
  • Self-decompression valve mechanism and low temperature refrigerator adopting self-decompression valve mechanism

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Embodiment Construction

[0026] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0027] Such as Figure 2-7 As shown: a self-decompression gas distribution mechanism, including a gas distribution valve 6 and a rotary valve 7. The gas distribution valve 6 is provided with a high-pressure air hole 62 penetrating the gas distribution valve 6 in the axial direction, and penetrating the gas distribution valve in the bending direction. 6, the gas distribution valve hole 63, the high-pressure gas hole 62 can communicate with the high-pressure exhaust pipeline 1a of the compressor 1, and the gas distribution valve hole 63 can communicate with the cover body gas hole 21 on the cover body 2; The high-pressure groove 72 on the valve 7 communicates with the air distribution valve air hole 63 and the housing air hole 21; The circumferential surface of the gas distribution valve 6 is provided with a first sealing ring b1 and a second sealing rin...

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Abstract

The invention discloses a self-decompression valve mechanism and a corresponding low temperature refrigerator. The self-decompression valve mechanism comprises an air distribution valve (6) and a rotation valve (7); the back surface of the air distribution valve (6) is dividing into a high pressure surface (66) and a low pressure surface (65); the high pressure surface (66) and the low pressure surface (65) are separated through a third sealing ring (b3) which seals the air distribution valve (6) and a cover body (2); a pressure relief vent (61) which axially penetrates through an air distribution surface (64) and the low pressure surface (65) of the air distribution valve (6) is arranged on the air distribution valve (6); and the pressure relief hole (61) is capable of communicating a lowpressure access (22) of the cover body (2) with the back surface of the air distribution valve (6) so as to import low pressure airflow in the cover body (2) to the back surface of the air distribution valve (6). The low temperature refrigerator comprises the self-decompression valve mechanism. Through the setting of the pressure relief hole and the third sealing ring, the compression area is decreased, the positive acting force is reduced and the abrasion is decreased.

Description

technical field [0001] The invention relates to the technical field of low-temperature refrigerators, in particular to a self-decompression gas distribution mechanism which reduces positive pressure and wear by modifying the structure of the gas distribution valve, and a low-temperature refrigeration system using the self-decompression gas distribution mechanism. machine. Background technique [0002] A cryogenic refrigerator typified by a Gifford-McMahon (GM) refrigerator has an expander and a compressor for a working gas (also referred to as refrigerant gas). This type of refrigerator provides high-pressure airflow discharged from the compressor, and enters the push piston that is placed in the cylinder and reciprocates up and down through the gas distribution mechanism, exchanges heat with the cold storage material, and then expands in the expansion chamber, and then passes through the push piston. The piston flows out of the valve train and returns to the low-pressure c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K11/074F16K47/04F25B9/14F25B41/04F25B41/20
CPCF16K11/074F16K47/04F25B9/14F25B41/20F25B2309/006F25B9/145
Inventor 李奥葛金宏夏晨曦周志坡
Owner CSIC PRIDE (NANJING) CRYOGENIC TECHNOLOGY CO LTD
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