A compression assembly structure and a rotary stirling refrigerator

Abstract

The utility model relates to refrigerating machine technical field, concretely is a kind of compression assembly structure and rotary stirling refrigerating machine, it mainly includes: compression cylinder;Compression piston, slidingly set in compression cylinder;Compression connecting rod, its one end is set in compression piston;Connecting assembly, it is set between compression piston and compression connecting rod, for connecting compression connecting rod and compression piston.The compression assembly structure and rotary stirling refrigerating machine of the application cancel deep groove ball bearing, compression pin shaft and pin hole, simple structure, easy to assemble, compression connecting rod and compression piston between using ball joint hinge connection, compression connecting rod ball head can rotate in certain angle circumferentially in ball socket, can reduce to refrigerating machine part machining accuracy and part assembly accuracy requirement, ensure that compression piston reciprocates smoothly in compression cylinder.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration technology, specifically to a compression component structure and a rotating Stirling refrigeration machine. Background Technology

[0002] Rotary Stirling refrigerators, with their compact structure, small size, light weight, and high efficiency, are ideal cold sources for devices such as infrared detectors and superconducting filters. They are widely used in the cryogenic industry, scientific research, and military fields. The compression assembly of a Stirling refrigerator includes parts such as a compression piston, compression cylinder, pin, deep groove ball bearing, and compression connecting rod. The deep groove ball bearing is installed in the compression connecting rod, and the compression pin passes through the deep groove ball bearing and is fixed on the symmetrical pin holes on both sides of the compression piston.

[0003] In the existing compression assembly structure, two symmetrical pin holes need to be made on the wear-resistant coating cylindrical surface of the compression piston to bond and fix the compression pin. The size and position tolerance of the two symmetrical pin holes are high, which not only destroys the integrity of the wear-resistant coating cylindrical surface of the piston, but also increases the processing difficulty. Secondly, the compression pin and the deep groove ball bearing are clearance fit. When the compression assembly of the refrigerator reciprocates, the compression pin and the deep groove ball bearing will repeatedly knock and rub, which will lead to increased noise in the refrigerator. Utility Model Content

[0004] The purpose of this invention is to provide a compression component structure and a rotary Stirling refrigerator to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A compression component structure, comprising: Compressor cylinder; The compression piston is slidably disposed within the compression cylinder; A compression connecting rod, one end of which is located inside a compression piston; A connecting assembly is disposed between a compression piston and a compression connecting rod, including a compression connecting rod ball head disposed on the compression connecting rod, and a ball socket is provided inside the compression piston, with the compression connecting rod ball head located inside the ball socket.

[0006] Preferably, one end of the compression connecting rod has a bearing hole, and the other end is connected to the ball head of the compression connecting rod.

[0007] Preferably, a deep groove ball bearing is installed in the bearing bore.

[0008] Preferably, the deep groove ball bearing is glued to the bearing bore for fixation.

[0009] Preferably, the ball head and socket of the compression connecting rod are connected into a whole by a spinning process.

[0010] Preferably, the ball socket is screwed onto the inner bottom surface of the compression piston and tightened.

[0011] Preferably, the end face of the compression piston is provided with at least one set of compression piston vent holes.

[0012] Preferably, the vent hole of the compression piston is connected to the gap between the ball head and the socket.

[0013] Preferably, the compression piston and the compression cylinder are fitted with a clearance.

[0014] A rotating Stirling refrigerator includes a compression assembly structure.

[0015] Compared with the prior art, the beneficial effects of this utility model are: This invention eliminates the deep groove ball bearing, compression pin, and pin hole, resulting in a simple structure and easy assembly. The compression connecting rod and compression piston are connected by a ball joint hinge, allowing the ball head of the compression connecting rod to rotate circumferentially at a certain angle within the ball socket. This reduces the requirements for the machining and assembly precision of the refrigeration unit parts, ensuring smooth reciprocating motion of the compression piston within the compression cylinder. The elimination of the symmetrical compression pins on both sides of the compression piston ensures the integrity of the friction pair surface, preventing coating peeling or stress concentration caused by excessive pin edge curvature, thus improving the wear resistance of the friction pair. Furthermore, the addition of a compression piston vent hole on the end face of the compression piston allows high-pressure working gas to form a high-pressure gas film on the friction pair surface between the ball socket and the ball head of the compression connecting rod, reducing frictional damping and noise on the friction pair surface. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a three-dimensional structural diagram of the compression link; Figure 3 This is a three-dimensional structural diagram of a compression piston.

[0017] In the diagram: 1. Deep groove ball bearing; 2. Compression connecting rod; 201. Compression connecting rod ball end; 3. Compression cylinder; 4. Compression piston; 401. Compression piston vent; 5. Ball socket. Detailed Implementation

[0018] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0019] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0020] like Figures 1-3 As shown, this application provides a compression assembly structure, including: a compression cylinder 3; a compression piston 4, slidably disposed within the compression cylinder 3; a compression connecting rod 2, one end of which is disposed within the compression piston 4; and a connecting assembly disposed between the compression piston 4 and the compression connecting rod 2, including a compression connecting rod ball head 201, the compression connecting rod ball head 201 being disposed on the compression connecting rod 2, and a ball socket 5 being disposed within the compression piston 4, with the compression connecting rod ball head 201 located within the ball socket 5.

[0021] Specifically, such as Figures 1-2 As shown, one end of the compression connecting rod 2 has a bearing hole, and the other end is connected to the ball head 201 of the compression connecting rod; a deep groove ball bearing 1 is installed in the bearing hole; the deep groove ball bearing 1 is glued and fixed to the bearing hole.

[0022] Specifically, such as Figure 1 As shown, the gap between the vent hole 401 of the compression piston, the ball head 201, and the ball socket 5 is connected; the ball head 201 and the ball socket 5 of the compression connecting rod are connected into a whole by a spinning process.

[0023] By adding a compression connecting rod ball head 201 to the compression connecting rod 2 and adding a ball socket 5 inside the compression piston 4 to cooperate with the compression connecting rod ball head 201, the compression connecting rod ball head 201 can rotate circumferentially at a certain angle in the ball socket 5, which can reduce the requirements for the machining accuracy and assembly accuracy of the refrigeration machine parts.

[0024] Specifically, such as Figure 1 As shown, the ball socket 5 is screwed onto the inner bottom surface of the compression piston 4 and tightened; the ball socket 5 and the compression piston 4 are connected by a screw thread.

[0025] The inner wall of the compression piston 4 is provided with internal threads, and the outer surface of the ball socket 5 is provided with external threads. The ball socket 5 is screwed into the compression piston 4 through the threaded engagement.

[0026] Specifically, such as Figure 3 As shown, the compression piston 4 is clearance-fitted with the compression cylinder 3, and at least one set of compression piston vent holes 401 are provided on the end face of the compression piston 4.

[0027] Because the gap between the vent hole 401 of the compression piston and the ball head 201 and the ball socket 5 is connected, when the compression piston 4 compresses the gas, the high-pressure working gas will flow into the contact surface between the compression connecting rod 2 and the ball socket 5 through the vent hole 401 of the compression piston to form a high-pressure gas mold, which plays a certain role in gas lubrication and air buoyancy support, reduces the frictional damping and frictional force of the contact surface between the compression connecting rod 2 and the ball socket 5, and thus reduces the wear and noise at this structure.

[0028] A rotating Stirling refrigerator includes a compression assembly structure.

[0029] The specific details of this plan are as follows: This design eliminates the deep groove ball bearing, compression pin, and pin hole, resulting in a simple structure and easy assembly. The compression connecting rod 2 and the compression piston 4 are connected by a ball joint hinge. The ball head 201 of the compression connecting rod can rotate circumferentially at a certain angle in the ball socket 5, which reduces the requirements for the machining accuracy and assembly accuracy of the refrigeration parts. This ensures the smooth reciprocating motion of the compression piston 4 in the compression cylinder 3. The compression piston 4 eliminates the symmetrical compression pins on both sides, ensuring the integrity of the friction pair surface and avoiding the coating peeling or stress concentration caused by excessive curvature of the pin edges, thus improving the wear resistance of the friction pair. At the same time, because a compression piston vent hole 401 is added to the end face of the compression piston 4, high-pressure working gas will form a high-pressure gas film on the friction pair surface between the ball socket 5 and the ball head 201 of the compression connecting rod, reducing the friction damping and noise of the friction pair surface.

[0030] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary; within the framework of this invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of this invention as described above, which are not provided in the details for the sake of brevity.

[0031] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A compression component structure, characterized in that, include: Compressed cylinder (3); The compression piston (4) is slidably disposed inside the compression cylinder (3); A compression connecting rod (2), one end of which is disposed inside the compression piston (4); A connecting assembly is disposed between the compression piston (4) and the compression connecting rod (2), including a compression connecting rod ball head (201), the compression connecting rod ball head (201) is disposed on the compression connecting rod (2), a ball socket (5) is disposed inside the compression piston (4), and the compression connecting rod ball head (201) is located inside the ball socket (5).

2. The compression component structure according to claim 1, characterized in that, One end of the compression connecting rod (2) is provided with a bearing hole, and the other end is connected to the ball head (201) of the compression connecting rod.

3. The compression component structure according to claim 2, characterized in that, A deep groove ball bearing (1) is installed in the bearing hole.

4. The compression component structure according to claim 3, characterized in that, The deep groove ball bearing (1) is glued and fixed to the bearing bore.

5. A compression component structure according to claim 1, characterized in that, The compression connecting rod ball head (201) and the ball socket (5) are connected into a whole by a spinning process.

6. The compression component structure according to claim 1, characterized in that, The ball socket (5) is screwed into the inner bottom surface of the compression piston (4) and tightened.

7. A compression component structure according to claim 1, characterized in that, The end face of the compression piston (4) is provided with at least one set of compression piston vent holes (401).

8. A compression component structure according to claim 7, characterized in that, The vent hole (401) of the compression piston is connected to the gap between the ball head (201) and the ball socket (5).

9. A compression component structure according to claim 1, characterized in that, The compression piston (4) is fitted with the compression cylinder (3) with a clearance.

10. A rotating Stirling refrigerator, characterized in that: The compression component structure includes any one of claims 1-9 above.

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