Sealing structure of high-pressure gas compressor

Abstract

The utility model relates to a sealing structure of a high-pressure gas compressor, which comprises a shell comprising a connecting block and a side cover, and the opposite sides of the connecting block and the side cover are respectively provided with a first mounting groove and a second mounting groove; the one-way valve mechanism is arranged in the side cover and comprises a threaded cylinder, a sealing top block and a supporting spring; the rotating shaft is arranged between the connecting block and the side cover and comprises a main shaft and a linkage block; the main sealing ring is arranged outside the rotating shaft, makes contact with the inner wall of the shell and comprises a ring body, a first inclined face and a second inclined face. Through the arrangement of components such as the one-way valve mechanism and the matching relation between the connecting block and the side cover, a hollow cavity can be formed between the connecting block and the side cover, and through the arrangement of the one-way valve mechanism, high-pressure gas can enter the hollow cavity; and therefore, the main sealing ring is always in contact with the linkage block and the shell under the action of air pressure.

Description

Technical Field

[0001] The utility model relates to the technical field of compressor sealing, in particular to a sealing structure of a high-pressure gas compressor. Background Art

[0002] The compressor is a driven fluid machine that boosts low-pressure gas to high-pressure gas. It is the heart of the refrigeration system. It sucks low-temperature and low-pressure refrigerant gas from the intake pipe, compresses it by driving the piston through the motor, and then discharges high-temperature and high-pressure refrigerant gas to the exhaust pipe, providing power for the refrigeration cycle.

[0003] When the compressor is working, the internal piston needs to be driven by the motor to move. During the rotation of the motor, kinetic energy is provided by driving the rotating shaft of the compressor. Usually, the motor is arranged on the outside of the compressor. Therefore, a sealing structure needs to be arranged at the rotating position of the rotating shaft. Most traditional sealing structures are rotating main sealing rings. The rotating main sealing rings will wear out after being used for a period of time, resulting in weakened sealing effect or even failure. Therefore, a sealing structure of a high-pressure gas compressor is proposed to solve the above-mentioned problems. Utility Model Content

[0004] Based on the above description, the utility model provides a sealing structure for a high-pressure gas compressor to solve the problem that the sealing effect of the existing rotating main sealing ring is weakened after being worn.

[0005] The utility model provides a technical solution to the above technical problems as follows: a high-pressure gas compressor sealing structure, comprising: an outer shell, the outer shell comprising a connecting block and a side cover, the connecting block and the side cover are respectively provided with a first mounting groove and a second mounting groove on opposite sides, a one-way valve mechanism is arranged inside the side cover, and comprises a threaded cylinder, a sealing top block and a supporting spring, a rotating shaft is arranged between the connecting block and the side cover, and comprises a main shaft and a linkage block, a main sealing ring is arranged outside the rotating shaft, and contacts with the inner wall of the outer shell, and comprises a ring body, a first inclined surface and a second inclined surface.

[0006] On the basis of the above technical solution, the present invention can also be improved as follows.

[0007] Furthermore, the connecting block comprises a block body, a first mounting groove is arranged on a side of the block body close to the side cover, and a main rubber sealing ring is arranged between the connecting block and the side cover.

[0008] Furthermore, the side cover includes a cover body, and a second mounting groove is provided on a side of the cover body close to the connecting block. The second mounting groove is completely consistent with the first mounting groove, and a hollow cavity is formed between the first mounting groove and the second mounting groove.

[0009] Furthermore, a protrusion is provided at the top of the cover body, a threaded blind hole extending to the inside of the cover body is provided inside the protrusion, and an air transmission hole is provided between the second mounting groove and the threaded blind hole.

[0010] Furthermore, a threaded barrel is arranged inside the threaded blind hole, and a secondary rubber sealing ring is arranged between the threaded barrel and the protrusion.

[0011] Furthermore, a support spring is arranged inside the threaded blind hole, a sealing top block is arranged between the support spring and the threaded barrel, and the top end of the sealing top block is a hemispherical surface.

[0012] Furthermore, a linkage block is arranged outside the main shaft, and the linkage block is a truncated cone block, and the diameter of the opposite side of the linkage block is smaller than the diameter of the opposite side thereof.

[0013] Furthermore, a first inclined surface and a second inclined surface are provided on one side of the ring body close to the linkage block, the second inclined surface contacts the surface of the linkage block, and the first inclined surface contacts the inner walls of the second mounting groove and the first mounting groove respectively.

[0014] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0015] 1. The utility model forms a hollow cavity between the connecting block and the side cover by setting components such as a one-way valve mechanism and the matching relationship between the connecting block and the side cover. The one-way valve mechanism allows high-pressure gas to enter the interior of the hollow cavity, so that the main sealing ring is always in contact with the linkage block and the housing under the action of air pressure;

[0016] 2. By setting the main sealing ring and the rotating shaft, a tight fit with the main sealing ring is achieved. When the interior of the hollow cavity is filled with high-pressure gas, when the surface where the linkage block contacts the main sealing ring is worn, since the air pressure inside the hollow cavity is higher than the air pressure outside the shell, the main sealing ring is pushed by the high-pressure gas, so that the main sealing ring always maintains a tight fit with the linkage. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A structural schematic diagram of a sealing structure for a high-pressure gas compressor provided by an embodiment of the utility model;

[0018] Figure 2 for Figure 1 Structural cross-sectional view of

[0019] Figure 3 for Figure 2 A structural diagram from another perspective;

[0020] Figure 4for Figure 3 A partial enlarged schematic diagram of the middle A area;

[0021] Figure 5 This is a schematic diagram of the structure of the main sealing ring in the embodiment of the utility model;

[0022] Figure 6 for Figure 5 A structural diagram from another perspective;

[0023] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0024] 1. Connecting block; 11. Block body; 12. First mounting groove; 2. Side cover; 21. Cover body; 22. Second mounting groove; 23. Bump; 24. Threaded blind hole; 25. Air delivery hole; 3. Rotating shaft; 31. Main shaft; 32. Linkage block; 4. Main sealing ring; 41. Ring body; 42. First inclined surface; 43. Second inclined surface; 5. Main rubber sealing ring; 6. Threaded cylinder; 7. Sealing top block; 8. Support spring; 9. Secondary rubber sealing ring. DETAILED DESCRIPTION

[0025] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0027] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" etc. specify the presence of stated features, wholes, steps, operations, components, parts or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts or combinations thereof.

[0028] See also Figure 1 and Figure 2 , a high-pressure gas compressor sealing structure, comprising:

[0029] The housing comprises a connection block 1 and a side cover 2, wherein:

[0030] The connecting block 1 and the side cover 2 are provided with a first mounting groove 12 and a second mounting groove 22 on opposite sides thereof, respectively. The connecting block 1 comprises a block body 11, and a first mounting groove 12 is provided on a side of the block body 11 close to the side cover 2. A main rubber sealing ring 5 is provided between the connecting block 1 and the side cover 2;

[0031] The side cover 2 includes a cover body 21, a second mounting groove 22 is provided on one side of the cover body 21 close to the connecting block 1, the second mounting groove 22 is completely consistent with the first mounting groove 12, a hollow cavity is formed between the first mounting groove 12 and the second mounting groove 22, a convex block 23 is provided on the top of the cover body 21, a threaded blind hole 24 extending to the inside of the cover body 21 is provided inside the convex block 23, and an air delivery hole 25 is provided between the second mounting groove 22 and the threaded blind hole 24;

[0032] Based on the above, the setting of the hollow cavity provides an installation space for the main sealing ring 4, and the protrusion 23, the threaded blind hole 24 and the gas supply hole 25 cooperate with each other, so that the one-way valve mechanism can be set inside the shell, and the hollow cavity is connected to the outside through the threaded blind hole 24 and the gas supply hole 25, so that high-pressure gas can be introduced into the interior of the hollow cavity.

[0033] like Figure 2-Figure 4 As shown, the one-way valve mechanism is arranged inside the side cover 2, and comprises a threaded barrel 6, a sealing top block 7 and a supporting spring 8. The threaded blind hole 24 is provided with a threaded barrel 6, a secondary rubber sealing ring 9 is provided between the threaded barrel 6 and the protrusion 23, the threaded blind hole 24 is provided with a supporting spring 8, a sealing top block 7 is provided between the supporting spring 8 and the threaded barrel 6, and the top end of the sealing top block 7 is a hemispherical surface;

[0034] Based on the above, the one-way valve mechanism cooperates with the threaded blind hole 24 and the gas delivery hole 25 so that the high-pressure gas cannot be discharged after entering the hollow cavity, thereby achieving the effect of one-way entry of high-pressure gas to ensure sufficient air pressure in the hollow cavity.

[0035] like Figure 2 and Figure 3 As shown, the rotating shaft 3 is arranged between the connecting block 1 and the side cover 2, and includes a main shaft 31 and a linkage block 32. The linkage block 32 is arranged outside the main shaft 31. The linkage block 32 is a truncated cone block. The diameter of the opposite side of the linkage block 32 is smaller than the diameter of the opposite side thereof.

[0036] A main sealing ring 4, which is arranged outside the rotating shaft 3 and contacts the inner wall of the housing, and comprises a ring body 41, a first inclined surface 42 and a second inclined surface 43. The first inclined surface 42 and the second inclined surface 43 are arranged on the side of the ring body 41 close to the linkage block 32, the second inclined surface 43 contacts the surface of the linkage block 32, and the first inclined surface 42 contacts the inner walls of the second mounting groove 22 and the first mounting groove 12 respectively;

[0037] Based on the above, the main sealing ring 4 cooperates with the outer shell and the linkage block 32, so that the rotating shaft 3 and the main sealing ring 4 fit tightly. When the rotating shaft 3 rotates for a long time, the contact surface between the main sealing ring 4 and the linkage block 32 wears. The worn main sealing ring 4 fits tightly with the linkage block 32 under the action of pressure.

[0038] In actual use, the present embodiment is provided with the connection block 1 outside the compressor. When the compressor is working, the rotating shaft 3 is driven to rotate, and the linkage block 32 rotates together. During this process, friction is generated between the linkage block 32 and the main sealing ring 4. Long-term operation may cause wear of the main sealing ring 4.

[0039] Before wear occurs, inert high-pressure gas can be introduced through the one-way valve mechanism to make the internal air pressure of the hollow cavity higher than the external air pressure. At this time, the main sealing ring 4 is tightly fitted with the linkage block 32 and the inner wall of the hollow cavity under the action of pressure. When wear occurs, the main sealing ring 4 is elastically deformed under the action of pressure to ensure that the main sealing ring 4 can still contact with the linkage block 32 and the inner wall of the shell;

[0040] Compared with the traditional main sealing ring, this sealing mechanism effectively uses external force, that is, pressure. By filling with inert high-pressure gas, the main sealing ring 4 is subjected to external force in all directions, and when wear occurs, it can undergo elastic deformation under the action of pressure to compensate for the worn part.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sealing structure for a high-pressure gas compressor, characterized in that: include: The housing comprises a connection block (1) and a side cover (2), wherein: The connecting block (1) and the side cover (2) are respectively provided with a first mounting groove (12) and a second mounting groove (22) on opposite sides thereof; A one-way valve mechanism, which is arranged inside the side cover (2) and comprises a threaded cylinder (6), a sealing top block (7) and a supporting spring (8); A rotating shaft (3), which is arranged between the connecting block (1) and the side cover (2), and comprises a main shaft (31) and a linkage block (32); The main sealing ring (4) is arranged outside the rotating shaft (3) and in contact with the inner wall of the housing, and comprises a ring body (41), a first inclined surface (42) and a second inclined surface (43).

2. The sealing structure according to claim 1, characterized in that: The connecting block (1) comprises a block body (11), a first mounting groove (12) is provided on a side of the block body (11) close to the side cover (2), and a main rubber sealing ring (5) is provided between the connecting block (1) and the side cover (2).

3. The sealing structure according to claim 2, characterized in that: The side cover (2) comprises a cover body (21), a second mounting groove (22) being provided on a side of the cover body (21) close to the connection block (1), the second mounting groove (22) being completely consistent with the first mounting groove (12), and a hollow cavity being formed between the first mounting groove (12) and the second mounting groove (22).

4. The sealing structure according to claim 3, characterized in that: A protrusion (23) is provided at the top of the cover body (21), a threaded blind hole (24) extending into the interior of the cover body (21) is provided inside the protrusion (23), and an air delivery hole (25) is provided between the second mounting groove (22) and the threaded blind hole (24).

5. The sealing structure according to claim 4, characterized in that: A threaded barrel (6) is arranged inside the threaded blind hole (24), and a secondary rubber sealing ring (9) is arranged between the threaded barrel (6) and the protrusion (23).

6. The sealing structure according to claim 5, characterized in that: A support spring (8) is arranged inside the threaded blind hole (24), a sealing top block (7) is arranged between the support spring (8) and the threaded barrel (6), and the top end of the sealing top block (7) is a hemispherical surface.

7. The sealing structure according to claim 1, characterized in that: A linkage block (32) is arranged outside the main shaft (31), and the linkage block (32) is a truncated cone block. The diameter of one side opposite to the linkage block (32) is smaller than the diameter of the opposite side.

8. The sealing structure according to claim 3, characterized in that: A first inclined surface (42) and a second inclined surface (43) are provided on one side of the ring body (41) close to the linkage block (32); the second inclined surface (43) contacts the surface of the linkage block (32); and the first inclined surface (42) contacts the inner walls of the second mounting groove (22) and the first mounting groove (12), respectively.

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