A backseat structure of a stirling cryocooler expander

Abstract

The utility model discloses a kind of Stirling cryogenic expander backseat structures, including outer sleeve, fixed support is fixedly connected with outer sleeve lower end, copper column is limit slidingly inserted and combined and installed in outer sleeve inner wall, copper column is red copper material, end cover is welded with outer sleeve top, end cover is stainless steel sheet material, the opening of fixed support right lower corner is equipped with the opening of gas transmission structure, outer sleeve is stainless steel material, and outer sleeve completely wraps copper column. The outermost layer outer sleeve of the backseat welding piece of this Stirling cryogenic expander backseat structure is stainless steel material, and the copper column in the backseat body is red copper material, the inner surface of the part of copper column close to lower end is screw thread, the end cover of the uppermost end is stainless steel sheet, by the welding of the outermost layer stainless steel material and stainless steel sheet, avoid copper column and stainless steel direct welding, to effectively avoid the generation of crack at welding, and can effectively avoid the generation of oxide when welding, since the backseat body inside is red copper column, not only improve the heat conduction effect of backseat body, also increase the adaptability of backseat body working environment.

Description

Technical Field

[0001] This utility model relates to the technical field of expander rear seat structure, specifically a Stirling refrigeration expander rear seat structure. Background Technology

[0002] An expander is a mechanical device in a Stirling refrigeration system used to achieve refrigerant reheating and refrigeration. Its working principle is based on the reverse Stirling cycle. When a gas is compressed and isochorically expanded in the expander, a strong heat transfer occurs between the hot and cold ends of the expander, thereby achieving a refrigeration effect in the expansion chamber.

[0003] Existing equipment is mostly fixed by overall support, but it has shortcomings, such as poor installation stability, poor structural stability, and inconvenience in use. In addition, the existing back seat welding parts are made of one piece of stainless steel, and the temperature resistance of the hot end of stainless steel to the working environment is limited, generally 80-90 degrees Celsius, which has certain limitations. When the pure copper back seat is welded to the stainless steel parts, cracks are prone to occur during the reprocessing of the weld. Furthermore, the flux of copper and stainless steel will react in the high temperature environment to form oxides, and bubbles will form at the weld, resulting in poor sealing at the weld. Therefore, a Stirling refrigerator expander back seat structure is needed to solve the above problems. Utility Model Content

[0004] The purpose of this utility model is to provide a Stirling refrigerator expander rear seat structure to solve the problems mentioned in the background art, such as poor installation stability, poor structural stability, and poor heat dissipation of existing stainless steel rear seats, which leads to limited operating temperature of the equipment.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a Stirling refrigerator expander rear seat structure, including an outer tube, a fixed support fixedly connected to the lower end of the outer tube, a copper column tightly slidably inserted and installed on the inner wall of the outer tube, the copper column being made of copper and having a threaded bottom to improve heat dissipation, and an end cap welded to the top of the outer tube, the end cap being made of stainless steel sheet.

[0006] The fixed support has an opening for the air supply structure at the lower right corner. The outer sleeve is made of stainless steel and completely wraps around the copper column. The outer wall of the outer sleeve is fitted with upper and lower heat dissipation fins. The upper and lower heat dissipation fins have a semi-circular groove structure in the middle. The upper heat dissipation fins have screw holes, and the lower heat dissipation fins are screwed with hexagonal screws. The upper and lower heat dissipation fins are fixed by the hexagonal screws.

[0007] Preferably, the copper column and the outer sleeve are concentrically inserted and supported, and the outer sleeve and the fixed support are distributed in a T-shaped structure.

[0008] Preferably, the upper and lower heat dissipation fins are joined together to form a circular structure in the middle, and this circular structure matches the outer diameter of the outer sleeve.

[0009] Compared with the prior art, the beneficial effects of this utility model are as follows: The outermost sleeve of the rear seat welding component is made of stainless steel, while the copper pillar inside the rear seat body is made of copper, and the uppermost end cap is made of stainless steel. Welding the outermost stainless steel material to the stainless steel sheet avoids direct welding between the copper pillar and the stainless steel, thus effectively preventing the generation of cracks at the weld and effectively preventing the generation of oxides during welding, which would lead to poor sealing at the weld. Since the interior of this rear seat body is made of copper, its thermal conductivity is 10 times that of traditional stainless steel. Therefore, in terms of heat conduction, this rear seat body has a better heat conduction effect and can withstand a working environment temperature of 110 degrees Celsius. Compared with traditional rear seats, it has better tolerance to working environment temperature, which not only improves the heat conduction effect of the rear seat body but also increases the adaptability of the rear seat body to the working environment. Attached Figure Description

[0010] Figure 1 This is a schematic view of the rear seat structure of the expander in a Stirling refrigerator according to this utility model;

[0011] Figure 2 This is a schematic front view of the assembly structure of the upper heat dissipation fins, lower heat dissipation fins and rear seat body of the Stirling refrigerator expander rear seat structure of the present invention.

[0012] Figure 3 This is a top view schematic diagram of the assembly structure of the upper and lower heat dissipation fins and the rear seat of the Stirling refrigerator expander according to this utility model.

[0013] In the diagram: 1. Upper heat dissipation fins, 2. Outer sleeve, 3. Fixing bracket, 4. Lower heat dissipation fins, 5. Copper pillar, 6. Hexagonal screw, 7. End cap. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figure 1-3This utility model provides a technical solution: a Stirling refrigerator expander rear seat structure, including an outer tube 2, a fixed support 3, a copper column 5 and an end cap 7. The lower end of the outer tube 2 is fixedly connected to the fixed support 3. The inner wall of the outer tube 2 is limited and slidably inserted and installed with the copper column 5. The copper column 5 and the outer tube 2 are concentrically inserted and supported. The outer tube 2 and the fixed support 3 are distributed in a T-shaped structure, which makes the structure of the outer tube 2 more stable and the support effect better.

[0016] The outer wall of the outer tube 2 is fitted with an upper heat dissipation fin 1 and a lower heat dissipation fin 4. The upper heat dissipation fin 1 and the lower heat dissipation fin 4 have a semi-circular groove structure in the middle. The upper heat dissipation fin 1 has a screw hole, and the lower heat dissipation fin 4 is screwed with a hexagonal screw 6. The upper heat dissipation fin 1 and the lower heat dissipation fin 4 are fixed by the hexagonal screw 6. After the upper heat dissipation fin 1 and the lower heat dissipation fin 4 are spliced ​​together, the middle of them is a circular structure, and the size of the circular structure matches the outer diameter of the outer tube 2. The upper heat dissipation fin 1 and the lower heat dissipation fin 4 can better dissipate heat.

[0017] The fixed support 3 has an opening for the air supply structure at the lower right corner. The outer sleeve 2 is made of stainless steel and completely wraps around the copper column 5. A radiator is welded to the bottom of the fixed support 3. The outermost outer sleeve 2 of the rear seat welded parts is made of stainless steel, while the copper column 5 inside the rear seat body is made of copper. The uppermost end cap 7 is made of stainless steel. Welding the outermost stainless steel material to the stainless steel sheet avoids direct welding between the copper column 5 and the stainless steel, thus effectively preventing the generation of cracks at the weld and the generation of oxides during welding, which would lead to poor sealing at the weld. Since the interior of this rear seat body is made of copper, its thermal conductivity is 10 times that of traditional stainless steel. Therefore, the thermal conductivity of this rear seat body is better in terms of heat conduction. Its working environment temperature can withstand 110 degrees Celsius. Compared with traditional rear seats, its working environment temperature tolerance is better, which not only improves the heat conduction effect of the rear seat body, but also increases the adaptability of the rear seat body to the working environment.

[0018] Working principle: In the process of using this Stirling refrigerator expander rear seat structure, the upper heat dissipation fins 1 and the lower heat dissipation fins 4 are spliced ​​together, and the outer sleeve 2 of the rear seat body is inserted into the spliced ​​circular through hole. Thermal conductive silicone grease is applied to the joint, and then the hexagonal screws 6 are used to lock and fix it. The copper pillars 5 made of purple copper conduct heat efficiently, and the heat is dissipated through the upper heat dissipation fins 1 and the lower heat dissipation fins 4, thereby greatly improving the heat conduction efficiency of the rear seat body and increasing the adaptability of the rear seat body to the working environment. This is the usage process of this Stirling refrigerator expander rear seat structure.

[0019] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A Stirling refrigerator expander rear seat structure, comprising an outer casing (2), characterized in that: The lower end of the outer tube (2) is fixedly connected to a fixed support (3), and a copper column (5) is installed on the inner wall of the outer tube (2) in a limited sliding fit. The copper column (5) is made of copper. An end cap (7) is welded to the top of the outer tube (2). The end cap (7) is made of stainless steel sheet. The fixed support (3) has an opening for the gas supply structure at the lower right corner. The outer sleeve (2) is made of stainless steel and completely wraps around the copper column (5). The outer wall of the outer sleeve (2) is fitted with an upper heat dissipation fin (1) and a lower heat dissipation fin (4). The upper heat dissipation fin (1) and the lower heat dissipation fin (4) have a semi-circular groove structure in the middle. The upper heat dissipation fin (1) has a screw hole, and the lower heat dissipation fin (4) is screwed with a hexagonal screw (6). The upper heat dissipation fin (1) and the lower heat dissipation fin (4) are screwed together and fixed by the hexagonal screw (6).

2. The Stirling refrigerator expander rear seat structure according to claim 1, characterized in that: The copper column (5) and the outer sleeve (2) are installed in a concentric insertion support, and the outer sleeve (2) and the fixed support (3) are distributed in a T-shaped structure.

3. The Stirling refrigerator expander rear seat structure according to claim 1, characterized in that: The upper heat dissipation fins (1) and the lower heat dissipation fins (4) are joined together to form a circular structure in the middle, and the size of the circular structure matches the outer diameter of the outer sleeve (2).

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