A static ring assembly for mechanical seals

Abstract

The utility model discloses a static ring assembly for mechanical seal, it includes: static ring, cover ring, seal ring, key block and screw, the rear end face of cover ring is in concave and is provided with the first ring groove corresponding with static ring, the front end of first ring groove is in concave and is provided with the second ring groove, and the static ring front end concentricity is provided with the guide portion extending in the second ring groove, and the seal ring sets up on the guide portion and is located in the first ring groove, and the guide portion outer wall symmetry is provided with the key groove, and the cover ring outer wall symmetry is provided with the screw hole corresponding with the key groove one to one, and the screw hole end is provided with the guide groove communicating with the key groove, and the side of key groove is provided with the first inclined plane extending to the front side of outside away from static ring tail portion, and the key block end is provided with the second inclined plane with the first inclined plane close fit, and the axial adjustment of key block is carried out through the rotation of screw, and the cooperation of first inclined plane and second inclined plane is utilized, and the axial movement of guide portion is driven, and the compression adjustment of seal ring is driven to move and ensure extrusion effect and sealing performance.

Description

Technical Field

[0001] This utility model relates to the field of mechanical seals, and in particular to a stationary ring assembly for mechanical seals. Background Technology

[0002] The stationary ring is the core component of a mechanical seal. It is formed by the contact of the end faces of the rotating ring and the stationary ring, which can slide relative to each other, thus preventing fluid leakage. At the same time, it does not affect the rotation of the shaft.

[0003] In mechanical seals, the stationary ring is typically fixed to a non-rotating component using pins or keys to keep it stationary; that is, once fixed, the stationary ring is not adjustable. To ensure a good seal after the stationary ring is assembled, a sealing ring is usually added.

[0004] During assembly, the sealing ring is compressed by the stationary ring to achieve a seal at the joint. However, since the stationary ring is fixed and cannot be adjusted, issues with machining precision and error may lead to incomplete compression of the sealing ring, affecting the sealing effect, which requires improvement. Utility Model Content

[0005] The purpose of this invention is to provide a stationary ring assembly for mechanical seals, which enables the stationary ring to be assembled and fixed, and improves the ease of adjustment.

[0006] To achieve this objective, the present invention adopts the following technical solution: A stationary ring assembly for a mechanical seal includes: a stationary ring, a cover ring, a sealing ring, a key block, and a screw. The rear end face of the cover ring is recessed with a first annular groove corresponding to the stationary ring. The stationary ring is disposed in the first annular groove. The front end of the first annular groove is recessed with a second annular groove. The front end of the stationary ring is concentrically provided with a guide portion extending into the second annular groove. The sealing ring is disposed on the guide portion and located in the first annular groove. The outer wall of the guide portion is symmetrically provided with keyways. The outer wall of the cover ring is symmetrically provided with threaded holes corresponding to the keyways. The end of the threaded hole is provided with a guide groove communicating with the keyway. The key block is disposed in the guide groove, and its end extends into the keyway. The screw is disposed in the threaded hole to secure the key block. The side of the keyway away from the tail of the stationary ring is provided with a first inclined surface extending obliquely outward and forward. The end of the key block is provided with a second inclined surface that fits against the first inclined surface.

[0007] The tail of the stationary ring protrudes beyond the rear end face of the cover ring.

[0008] Wherein, the outer diameter of the guide portion is smaller than the outer diameter of the stationary ring, and the diameter of the second annular groove is smaller than the diameter of the first annular groove.

[0009] The number of keyways is at least two.

[0010] When the key block moves inward under the action of the screw, the guide part moves forward through the cooperation of the first inclined surface and the second inclined surface, which in turn drives the stationary ring to move forward to compress the sealing ring.

[0011] The guide section and the stationary ring adopt an integrated structure.

[0012] The guide groove has a square cross-section.

[0013] The beneficial effects of this utility model are as follows: A stationary ring assembly for a mechanical seal allows for axial adjustment of the key block by rotating the screw. The cooperation between the first and second inclined surfaces drives the axial movement of the guide part, which in turn moves the stationary ring to compress and adjust the sealing ring, ensuring the compression effect and sealing performance, and preventing the stationary ring from twisting. This achieves convenient assembly and adjustment of the stationary ring. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 yes Figure 1 A magnified view of part A in the middle. Detailed Implementation

[0015] The following is combined Figures 1 to 2 The technical solution of this utility model will be further illustrated through specific embodiments.

[0016] like Figure 1 The mechanical seal stationary ring assembly shown includes: a stationary ring 1, a cover ring 2, a sealing ring 3, a key block 4, and a screw 5. The rear end face of the cover ring 2 has a recessed first annular groove 21 corresponding to the stationary ring 1. The stationary ring 1 is disposed in the first annular groove 21. In this embodiment, the tail of the stationary ring 1 protrudes from the rear end face of the cover ring 2. The tail of the stationary ring 1 fits against the end face of the rotating ring, forming a mechanical seal structure to prevent fluid leakage. The cover ring 2 is fixed to the equipment housing to be sealed by bolts, facilitating easy assembly and disassembly.

[0017] A second annular groove 22 is recessed at the front end of the first annular groove 21, and a guide portion 11 extending into the second annular groove 22 is concentrically provided at the front end of the stationary ring 1 for axial adjustment and guidance of the stationary ring 1. In this embodiment, the guide portion 11 and the stationary ring 1 adopt an integrated structure and are integrally formed to ensure structural stability.

[0018] like Figure 1 As shown, the outer diameter of the guide portion 11 is smaller than the outer diameter of the stationary ring 1, and the diameter of the second annular groove 22 is smaller than the diameter of the first annular groove 21, forming a step. The sealing ring 3 is disposed on the guide portion 11 and located in the first annular groove 21, that is, located in the step. The sealing ring 3 is compressed by the stationary ring 1 to achieve elastic deformation of the sealing ring 3, ensuring the sealing effect.

[0019] Keyways 12 are symmetrically arranged on the outer wall of the guide portion 11. The number of keyways 12 is at least two. In this embodiment, two symmetrically distributed keyways 12 are used. Two threaded holes 23 corresponding to the keyways 12 are symmetrically arranged on the outer wall of the cover ring 2. The end of the threaded hole 23 is provided with a guide groove 24 communicating with the keyway 12. The key block 4 is disposed in the guide groove 24 and its end extends into the keyway 12 to avoid the rotation problem of the guide portion 11.

[0020] In this embodiment, the guide groove 24 has a square cross-section, which can both guide the movement of the key block 4 and prevent the key block 4 from twisting. The screw 5 is set in the threaded hole 23 to secure the key block 4. The axial adjustment of the key block 4 is achieved by rotating the screw 5, and pressure is applied.

[0021] like Figure 2 As shown, the keyway 12 has a first inclined surface 13 extending outward and forward on the side opposite to the tail of the stationary ring 1. The end of the key block 4 has a second inclined surface 41 that fits with the first inclined surface 13. When the key block 4 moves inward under the action of the screw 5, the guide part 11 moves forward through the cooperation of the first inclined surface 13 and the second inclined surface 41, thereby driving the stationary ring 1 to move forward and compress the sealing ring 3, ensuring the sealing effect and making the operation simple.

[0022] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A stationary ring assembly for a mechanical seal, characterized in that, include: The package includes a stationary ring, a cover ring, a sealing ring, a key block, and a screw. The rear end face of the cover ring has a first annular groove corresponding to the stationary ring. The stationary ring is disposed in the first annular groove. The front end of the first annular groove has a second annular groove. The front end of the stationary ring has a guide portion extending into the second annular groove. The sealing ring is disposed on the guide portion and located in the first annular groove. The outer wall of the guide portion has symmetrically arranged keyways. The outer wall of the cover ring has symmetrically arranged threaded holes corresponding to the keyways. The end of the threaded holes has a guide groove communicating with the keyways. The key block is disposed in the guide groove, and its end extends into the keyway. The screw is disposed in the threaded hole to secure the key block. The side of the keyway away from the tail of the stationary ring has a first inclined surface extending obliquely outward and forward. The end of the key block has a second inclined surface that fits against the first inclined surface.

2. The stationary ring assembly for a mechanical seal according to claim 1, characterized in that, The tail of the stationary ring protrudes beyond the rear end face of the cover ring.

3. The stationary ring assembly for a mechanical seal according to claim 1, characterized in that, The outer diameter of the guide portion is smaller than the outer diameter of the stationary ring, and the diameter of the second annular groove is smaller than the diameter of the first annular groove.

4. The stationary ring assembly for a mechanical seal according to claim 1, characterized in that, The number of keyways is at least two.

5. The stationary ring assembly for a mechanical seal according to claim 1, characterized in that, When the key block moves inward under the action of the screw, the guide part moves forward through the cooperation of the first inclined surface and the second inclined surface, which in turn drives the stationary ring to move forward to compress the sealing ring.

6. The stationary ring assembly for a mechanical seal according to claim 1, characterized in that, The guide section and the stationary ring adopt an integrated structure.

7. The stationary ring assembly for a mechanical seal according to claim 1, characterized in that, The guide groove has a square cross-section.

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