Linear integral stirling cryocooler

An integral, refrigerator technology, used in refrigerators, refrigeration and liquefaction, compressors, etc., can solve problems such as short length, and achieve the effect of reducing vibration displacement

Active Publication Date: 2014-09-17
CHINA ELECTRONICS TECH GROUP CORP NO 16 INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the application drawbacks of the existing rotary integrated Stirling refrigerators, linear split Stirling refrigerators and linear integrated Stirling refrigerators under rotating conditions, and to provide a linear integrated Stirling refrigerator. Stirling refrigerator, the Stirling refrigerator has the characteristics of symmetrical structure, short length, low vibration and easy rotation

Method used

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  • Linear integral stirling cryocooler
  • Linear integral stirling cryocooler
  • Linear integral stirling cryocooler

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Such as figure 1 A linear integral Stirling refrigerator is shown, including a Dewar 1, an expander and a compressor. The outer side of the Dewar 1 is provided with a shock absorber 4 for reducing the vibration of the cold head. The expander includes an expansion cylinder 2 and an ejector assembly 3. The compressor includes a fixed piston 6, a moving cylinder 5, a linear motor, and a phase adjustment mechanism 8 for adjusting the phase difference between the ejector and the moving cylinder. The fixed piston 6 has a hollow structure, and the expander is located inside the fixed piston 6. The fixed piston 6 is sleeved in the moving cylinder 5, the non-contact gap sealing structure is formed between the fixed piston 6 and the moving cylinder 5, and the sealed cavity composed of the fixed piston 6 and the moving cylinder 5 is compressed Cavity. The moving cylinder 5 reciprocates along its axial direction driven by a linear motor. The outer side of the fixed piston 6 is f...

Embodiment 2

[0036] Such as Figure 7 with Figure 8 As shown, the mover assembly 7 is composed of a mover skeleton 72 and a mover winding 73. The stator assembly 13 is composed of a stator frame 15, magnetic poles 17 and stator permanent magnets 18.

[0037] Others are the same as in Example 1.

[0038] During operation, the fixed piston 6 is fixed and the movable cylinder 5 is driven by the linear motor moving subassembly 7 to reciprocate along its axial direction. In the present invention, the expander is placed inside the fixed piston 6, which shortens the overall length of the linear integral Stirling refrigerator; and by arranging the shock absorber 4 outside the Dewar 1, the vibration displacement at the cold head can be reduced, It is conducive to the application of the linear Stirling refrigerator on the gyro frame of the missile.

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Abstract

The invention relates to a linear integral stirling cryocooler. The stirling cryocooler comprises a Dewar, an expansion machine and a compressor. The outer side of the circumference of the Dewar is provided with a damper for reducing the vibration of a cold head. The expansion machine comprises an expansion cylinder and a displacer component. The compressor comprises a fixed piston, a movable cylinder, a linear motor and a phase regulation mechanism for regulating the movement phase difference between a displacer and the movable cylinder. The fixed piston is of a hollow structure, and the expansion machine is located in the fixed piston. The fixed piston is sleeved with the movable cylinder, a non-contact clearance sealed structure is arranged between the fixed piston and the movable cylinder, and a sealed cavity formed by the fixed piston and the movable cylinder is a compression cavity. The movable cylinder reciprocates along the axial direction of the linear motor under the driving of the linear motor. According to the technical scheme, by adopting the invention, the length of the integral linear integral stirling cryocooler is shortened, the vibration of the cold head is reduced, and the application of the linear stirling cryocooler to the gyro gimbal of a guided missile is facilitated.

Description

Technical field [0001] The invention relates to the technical field of Stirling refrigerators, in particular to a linear integral type Stirling refrigerator. [0002] Background technique [0003] At present, there are mainly three types of Stirling refrigerators: rotary integral type Stirling refrigerator, linear split type Stirling refrigerator and linear integral type Stirling refrigerator. The rotating integral Stirling refrigerator is driven by a rotating electric machine and has an "L" shape. Under rotating conditions, not only the counterweight needs to be increased, but the rotating electric machine will also bring greater radial vibration to the cold head. The linear split-type Stirling refrigerator is composed of opposed linear compressors and expanders, connected by branch pipes in the middle, and has a "sing" shape. The linear split type Stirling refrigerator needs to separate the compressor and the expander under rotating conditions, which will take up a large space,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B9/14
Inventor 杨坤朱魁章
Owner CHINA ELECTRONICS TECH GROUP CORP NO 16 INST
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