Sealing structure of Stirling cryocooler and Stirling cryocooler

Abstract

The utility model relates to a sealing structure of a Stirling cryocooler and the Stirling cryocooler, and the sealing structure comprises a first sealing flange which is connected with a first shell of the Stirling cryocooler; the second sealing flange is connected with a second shell of the Stirling cryocooler; the sealing piece is connected with the first sealing flange and the second sealing flange; a first step part is formed on the face, facing the second sealing flange, of the first sealing flange, a second step part is formed on the face, facing the first sealing flange, of the second sealing flange, and the first step part and the second step part are buckled with each other. The sealing pieces are arranged at different height positions, so that different layers of sealing structures are formed, and the good sealing effect is achieved.

Description

Technical Field

[0001] The utility model relates to the field of Stirling refrigerators, in particular to a sealing structure of a Stirling refrigerator and a Stirling refrigerator. Background Art

[0002] In the patent application with application number 202223029548.8 and patent name "A Stirling Refrigerator", the sealing grooves are all set at the same height position, that is, in the height direction, the Stirling refrigerator has only one layer of sealing grooves. Therefore, when misalignment occurs between the flanges, the sealing structure is easily destroyed to produce a gap, causing the gas working medium inside the Stirling refrigerator to leak to the outside through the gap, thereby causing the internal gas pressure to decrease, affecting the performance of the detector. Utility Model Content

[0003] The purpose of the utility model is to provide a sealing structure of a Stirling refrigerator and a Stirling refrigerator, wherein sealing members are arranged at different heights to form sealing structures of different layers, thereby achieving a good sealing effect.

[0004] To achieve the above objectives, the present invention provides the following technical solutions:

[0005] In one aspect, a sealing structure for a Stirling refrigerator is provided, comprising:

[0006] a first sealing flange connected to a first shell of the Stirling refrigerator;

[0007] a second sealing flange connected to a second shell of the Stirling refrigerator;

[0008] and a sealing member connecting the first sealing flange and the second sealing flange;

[0009] A first step portion is formed on a surface of the first sealing flange facing the second sealing flange, and a second step portion is formed on a surface of the second sealing flange facing the first sealing flange, and the first step portion and the second step portion are buckled with each other.

[0010] Preferably, the first step portion and the second step portion respectively include a plurality of first step surfaces and second step surfaces, and the first step surfaces and the second step surfaces are buckled in one-to-one correspondence. There are a plurality of sealing members, and each sealing member is connected to a group of first step surfaces and second step surfaces that are buckled in one another.

[0011] Preferably, at least two sealing members are located on different planes perpendicular to the axial direction of the first housing.

[0012] Preferably, several sealing members located in the same plane are arranged in concentric circles.

[0013] Preferably, the sealing member comprises:

[0014] a receiving groove, which is provided on the first step surface / the second step surface;

[0015] a sealing strip accommodated in the accommodation groove;

[0016] an engaging groove, which is formed on the second step surface that engages with the first step surface, or formed on the first step surface that engages with the second step surface;

[0017] An engaging member is connected to the sealing strip and is embedded in the engaging groove.

[0018] Preferably, there are multiple embedding grooves and embedding parts, and each embedding part is embedded in a corresponding embedding groove.

[0019] Preferably, the engaging groove and the engaging member are tooth-shaped structures that are adapted to each other.

[0020] Preferably, the engaging groove and the engaging piece are integrally formed.

[0021] Preferably, the first sealing flange and the second sealing flange are detachably connected.

[0022] On the other hand, a Stirling refrigerator is provided, which includes the above-mentioned sealing structure.

[0023] In summary, the present invention has the following beneficial effects compared with the prior art:

[0024] The utility model arranges seals at different height positions to form sealing structures of different layers, so as to increase the resistance during gas leakage and increase the sealing area within a limited size space, so as to fully block the gas at different positions, further reduce the possibility of gas leakage, and achieve a good sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a cross-sectional view of the sealing structure in the present utility model.

[0026] Figure 2 for Figure 1 Enlarged view at point A. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0028] Example 1

[0029] like Figure 1 As shown, this embodiment provides a sealing structure of a Stirling refrigerator, which includes:

[0030] A first sealing flange 1 connected to the first shell 100 of the Stirling refrigerator;

[0031] a second sealing flange 2 connected to the second shell of the Stirling refrigerator;

[0032] and a sealing member connecting the first sealing flange 1 and the second sealing flange 2;

[0033] A first step portion 11 is formed on a surface of the first sealing flange 1 facing the second sealing flange 2, and a second step portion 21 is formed on a surface of the second sealing flange 2 facing the first sealing flange 1, and the first step portion 11 and the second step portion 21 are buckled with each other;

[0034] Specifically, the first step portion 11 includes several first step surfaces 111, the second step portion 12 includes several second step surfaces 121, and the first step surfaces 111 and the second step surfaces 121 are snapped together one by one to form multiple groups of mating surfaces. At the same time, there are several seals 3, and each seal 3 is connected to a group of first step surfaces 111 and second step surfaces 121 that are snapped together, and at least two seals 3 are located on different planes perpendicular to the axial direction of the first shell 100, that is, at least two seals 3 are located at different mating surfaces.

[0035] Furthermore, in this embodiment, the first sealing flange 1 and the first step portion 11 are integrally formed, and / or the second sealing flange 2 and the second step portion 21 are integrally formed. Furthermore, the sealing members 3 are made of soft metal (such as tin, silver, copper, etc.), plastic, or rubber, and the first sealing flange 1 and the second sealing flange 2 are detachably connected by fasteners (such as screws, bolts, etc.).

[0036] like Figure 1 As shown, if the internal working fluid gas leaks out, it must escape along the direction indicated by the arrow, along the step portion, and through a broken line path, thereby increasing the resistance during gas leakage. At the same time, in the axial direction of the first shell 100, by arranging seals 3 at different height positions to form sealing structures of different layers, the sealing area can be increased within a limited size space, so as to fully block the gas at different positions, further reducing the possibility of gas leakage, and achieving a good sealing effect.

[0037] Example 2:

[0038] The only difference between this embodiment and embodiment 1 is that Figure 2 As shown, the sealing member 3 includes: a first sealing member 31 and a second sealing member 31', and the first sealing member 31 and the second sealing member 31' are located on different planes perpendicular to the axial direction of the first housing 100; there can be multiple first sealing members 31, and the multiple first sealing members 31 located on the same plane are arranged in concentric circles, and / or, there can be multiple second sealing members 3', and the multiple second sealing members 31' located on the same plane are arranged in concentric circles;

[0039] Specifically, the first sealing member 31 or the second sealing member 31 ′ is respectively connected to the first step surface 11 and the second step surface 21 that is engaged with the first step surface 11 .

[0040] Furthermore, the first sealing member 31 or the second sealing member 31' includes:

[0041] An accommodating groove 30 is formed on the first step surface 11 and the second step surface 21;

[0042] a sealing strip 32 received in the receiving groove 30;

[0043] an engaging groove 33 , which is formed on the second step surface 21 engaged with the first step surface 11 , or formed on the first step surface 11 engaged with the second step surface 21 ;

[0044] A fitting member 34 is connected to the bottom of the sealing strip 32 and is embedded in the fitting groove 33. In this embodiment, there can be multiple fitting grooves 33 and fitting members 34, and each fitting member 34 is correspondingly embedded in one fitting groove 33. The fitting grooves 33 and fitting members 34 can be integrally formed.

[0045] Thus, sealing is achieved by the engagement of the engaging member 34 and the engaging groove 33 . Meanwhile, for ease of manufacturing, the first sealing member 31 and the second sealing member 31 ′ in this embodiment may have the same structure.

[0046] Furthermore, in this embodiment, the shape of the accommodating groove 30 can be a regular geometric shape such as a circle, a rectangle, a square, etc., and the fitting groove 33 and the fitting member 34 are tooth-shaped structures that are adapted to each other.

[0047] Example 3:

[0048] This embodiment provides a Stirling refrigerator, which includes the sealing structure described in embodiment 1 or 2.

[0049] To sum up, the structural design of the utility model is simple. It sets seals at different heights to form sealing structures of different layers, thereby increasing the resistance during gas leakage and increasing the sealing area within a limited space, so as to fully block the gas at different positions, further reduce the possibility of gas leakage, and achieve a good sealing effect.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A sealing structure for a Stirling refrigerator, comprising: a first sealing flange connected to a first shell of the Stirling refrigerator; a second sealing flange connected to a second shell of the Stirling refrigerator; and a sealing member connecting the first sealing flange and the second sealing flange; It is characterized in that a first step portion is formed on a surface of the first sealing flange facing the second sealing flange, a second step portion is formed on a surface of the second sealing flange facing the first sealing flange, and the first step portion and the second step portion are buckled with each other.

2. The sealing structure according to claim 1, wherein: The first step portion and the second step portion respectively include a plurality of first step surfaces and second step surfaces, and the first step surfaces and the second step surfaces are buckled in one-to-one correspondence. There are a plurality of sealing members, and each sealing member is connected to a group of first step surfaces and second step surfaces that are buckled in one another.

3. The sealing structure according to claim 2, wherein: At least two sealing members are located on different planes perpendicular to the axial direction of the first housing.

4. The sealing structure according to claim 3, wherein: Several sealing members located on the same plane are arranged in concentric circles.

5. The sealing structure according to claim 2, wherein: The sealing member comprises: a receiving groove, which is provided on the first step surface / the second step surface; a sealing strip accommodated in the accommodation groove; an engaging groove, which is formed on the second step surface that engages with the first step surface, or formed on the first step surface that engages with the second step surface; An engaging piece is connected to the sealing strip and is embedded in the engaging groove.

6. The sealing structure according to claim 5, wherein: There are multiple embedding grooves and embedding parts, and each embedding part is correspondingly embedded in one embedding groove.

7. The sealing structure according to claim 5, wherein: The engaging groove and the engaging piece are tooth-shaped structures that are adapted to each other.

8. The sealing structure according to claim 5, wherein: The engaging groove and the engaging piece are integrally formed.

9. The sealing structure according to claim 1, wherein: The first sealing flange and the second sealing flange are detachably connected.

10. A Stirling refrigerator, characterized in that: The sealing structure comprises the sealing structure according to any one of claims 1 to 9.

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