Compression assembly of self-adaptive high-wear-resistance small Stirling cryocooler

Abstract

The utility model relates to the technical field of Stirling cryocoolers, and solves the problems that the piston surface is abraded and the service life of a piston is shortened due to the fact that the piston is easy to generate mutual friction in the operating process of the piston in a cylinder. The self-adaptive high-wear-resistance small Stirling cryocooler compression assembly comprises an air cylinder, a piston is arranged in the air cylinder, a driving connecting rod is arranged in the piston, a driving bearing is arranged in the driving connecting rod, a through hole is formed in the surface of the driving connecting rod, and a joint assembly is arranged in a circular groove. The joint assembly comprises a cavity block, the surface of the cavity block is installed in the through hole, an inner ball is rotationally connected into the cavity block, the piston is made of ceramic, lubricating paint is attached to the outer surface of the piston, a driving shaft is inserted into one end of the driving bearing, one end of the driving shaft is inserted into a bearing inner ring of the driving bearing, and the other end of the driving shaft is inserted into a bearing outer ring of the driving bearing. And an inserting groove is formed in one side of the surface of the piston.

Description

Technical Field

[0001] The utility model relates to the technical field of Stirling refrigerators, in particular to an adaptive high-wear-resistant small Stirling refrigerator compression component. Background Art

[0002] A Stirling refrigerator is a refrigeration device that uses the Stirling cycle principle. It drives the working fluid to circulate in a closed system through external energy input to achieve a refrigeration effect. This type of refrigerator usually uses helium or hydrogen as a working fluid. Due to its high efficiency in the refrigeration process and compact structure, it is widely used in fields that require a low-temperature environment, such as aerospace, superconductivity, infrared detection, and cryogenic electronics.

[0003] The existing Stirling refrigerator has the advantages of high stability and refrigeration effect.

[0004] However, when people use the Stirling refrigerator, the pistons are prone to mutual friction during operation in the cylinder, causing wear on the piston surface and shortening the service life of the piston. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides an adaptive highly wear-resistant small Stirling refrigerator compression assembly, which solves the problem that the piston is prone to mutual friction during the operation of the cylinder, causing the piston surface to be easily worn and resulting in a shortened piston service life.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an adaptive high wear-resistant small Stirling refrigerator compression assembly, comprising a cylinder, a piston is arranged inside the cylinder, a driving connecting rod is arranged inside the piston, a driving bearing is arranged inside the driving connecting rod, a through hole is opened on the surface of the driving connecting rod, and a joint assembly is arranged inside the circular groove;

[0007] The joint assembly includes a cavity block, the surface of the cavity block is mounted to the inside of the through hole, and the inside of the cavity block is rotatably connected with an inner ball;

[0008] The piston is made of ceramic, and a lubricating coating is attached to the outer surface.

[0009] In a specific embodiment, a driving shaft is inserted into one end of the driving bearing, and one end of the driving shaft is inserted into the inner ring of the driving bearing and penetrates the inner ring.

[0010] In a specific embodiment, a plug-in groove is provided on one side of the piston surface, a pin is inserted into the plug-in groove, and the pin passes through the interior of the inner ball.

[0011] In a specific embodiment, a through groove is provided in the middle of the inner ball, and the through groove is matched with the size of the pin.

[0012] In a specific embodiment, the diameter of the piston is matched with the inner diameter of the cylinder.

[0013] In a specific embodiment, the inner wall of the cavity block is coated with grease.

[0014] Compared with the prior art, the utility model provides an adaptive high wear-resistant small Stirling refrigerator compression assembly, which has the following beneficial effects:

[0015] In the technical solution disclosed by the utility model, a joint assembly, a cylinder and a piston are used in cooperation with each other. During use by a person, the cylinder drives the piston to rub against each other to generate friction. The piston is made of ceramic, which reduces the friction between the piston and the cylinder and reduces wear, thereby increasing the service life of the piston.

[0016] One end of the driving bearing provided by the utility model is plugged with a driving shaft, and one end of the driving shaft is plugged into the inner ring of the driving bearing and penetrates the inner ring. When personnel use the driving connecting rod and the pin, the driving connecting rod is driven by the cylinder to reciprocate, and the cavity block and the inner ball cooperate with each other, so that the driving connecting rod effectively avoids the radial force generated by the piston, thereby ensuring the service life of the ceramic parts during work. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the split structure of the utility model;

[0020] Figure 3 This is a schematic diagram of the driving connecting rod structure of the utility model;

[0021] Figure 4 It is a schematic diagram of the cross-sectional structure of the joint component of the utility model.

[0022] In the figure: 1, cylinder; 2, piston; 3, driving connecting rod; 4, driving bearing; 5, through hole; 6, driving shaft; 7, joint assembly; 71, cavity block; 72, inner ball; 8, socket groove; 9, pin. DETAILED DESCRIPTION

[0023] The following will describe the implementation methods of the present application in detail with the help of accompanying drawings and examples, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0024] Figure 1-Figure 4 An embodiment of the utility model is an adaptive high wear-resistant small Stirling refrigerator compression assembly, including a cylinder 1, a piston 2 is provided inside the cylinder 1, a driving connecting rod 3 is provided inside the piston 2, a driving bearing 4 is provided inside the driving connecting rod 3, a through hole 5 is opened on the surface of the driving connecting rod 3, and a joint assembly 7 is provided inside the through hole 5.

[0025] The specific problem addressed by this specific embodiment is to solve the problem that the piston 2 is prone to mutual friction during operation in the cylinder 1, which causes the surface of the piston 2 to be worn and the service life of the piston 2 to be shortened. The utility model uses the joint assembly 7, the cylinder 1 and the piston 2 to cooperate with each other. During the use of the utility model, the friction force generated by the mutual friction between the cylinder 1 and the piston 2 is generated. The piston 2 is made of ceramic, so that the friction between the piston 2 and the cylinder 1 is reduced and the wear is reduced, thereby increasing the service life of the piston 2.

[0026] The piston 2 is made of ceramic, and a lubricating coating is applied to the outer surface.

[0027] The joint assembly 7 includes a cavity block 71, the surface of which is mounted to the inside of the through hole 5, and the inner ball 72 is rotatably connected to the inside of the cavity block 71. In the present specific embodiment, a drive shaft 6 is inserted into one end of the driving bearing 4, and one end of the driving shaft 6 is inserted into the inner ring of the driving bearing 4 and passes through the inner ring. When a person uses the driving connecting rod 3 and the pin 9, and the driving connecting rod 3 is driven by the cylinder 1 to reciprocate, the cavity block 71 and the inner ball 72 cooperate with each other, so that the driving connecting rod 3 can effectively avoid the radial force generated by the piston 2.

[0028] In this specific embodiment, a plug-in groove 8 is provided on one side of the surface of the piston 2, a pin 9 is inserted into the plug-in groove 8, and the pin 9 passes through the interior of the inner ball 72. A through groove is provided in the middle of the inner ball 72, and the through groove is adapted to the size of the pin 9. The diameter of the piston 2 is adapted to the inner diameter of the cylinder 1, and the inner wall of the cavity block 71 is coated with grease.

[0029] The control method of the present invention is automatic control through a controller. The control circuit of the controller can be realized by simple programming by technicians in this field. The provision of power is also common knowledge in this field. The present invention is mainly used to protect mechanical devices, so the present invention will no longer explain the control method and circuit connection in detail.

[0030] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An adaptive high wear-resistant small Stirling refrigerator compression assembly, comprising a cylinder (1), characterized in that: The cylinder (1) is provided with a piston (2) inside, the piston (2) is provided with a driving connecting rod (3) inside, the driving connecting rod (3) is provided with a driving bearing (4) inside, a through hole (5) is opened on the surface of the driving connecting rod (3), and a joint assembly (7) is provided inside the through hole (5); The joint assembly (7) comprises a cavity block (71), the surface of the cavity block (71) is mounted to the inside of the through hole (5), and the inside of the cavity block (71) is rotatably connected to an inner ball (72); The piston (2) is made of ceramic, and a lubricating coating is applied to the outer surface.

2. The adaptive high wear-resistant small Stirling refrigerator compression assembly according to claim 1 is characterized in that: A drive shaft (6) is inserted into one end of the drive bearing (4), and one end of the drive shaft (6) is inserted into the inner ring of the drive bearing (4) and penetrates the inner ring.

3. The adaptive high wear-resistant small Stirling refrigerator compression assembly according to claim 2 is characterized in that: A plug-in groove (8) is provided on one side of the surface of the piston (2), a pin (9) is inserted into the plug-in groove (8), and the pin (9) penetrates the interior of the inner ball (72).

4. The adaptive high wear-resistant small Stirling refrigerator compression assembly according to claim 3 is characterized in that: A through groove is provided in the middle of the inner ball (72), and the through groove is matched to the size of the pin (9).

5. The adaptive high wear-resistant small Stirling refrigerator compression assembly according to claim 1, characterized in that: The diameter of the piston (2) matches the internal diameter of the cylinder (1).

6. The adaptive high wear-resistant small Stirling refrigerator compression assembly according to claim 1, characterized in that: The inner wall of the cavity block (71) is coated with lubricating grease.

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