Mechanical seal elastic force adjusting mechanism

Abstract

The utility model discloses a mechanical sealing spare elasticity adjusting mechanism, it includes: shaft sleeve, spring, limit ring, slip ring, stud, moving ring and static ring, limit ring concentricity is set on the shaft sleeve, slip ring concentricity is set on the shaft sleeve and is located the front of limit ring, and the limit ring front face interval is provided with the guide hole of the direction slip ring, is provided with the floating block in the guide hole, and the spring sets up between the floating block and slip ring, and the floating block rear end concentricity is provided with the first outer taper surface, and the limit ring outer wall is provided with the thread hole of the direction first outer taper surface, and the stud sets up in the thread hole, and the stud end sets up with the second outer taper surface of the first outer taper surface contact, and the moving ring sets up in the front of slip ring, and the static ring sets up in the front of moving ring, through the screwing of stud, can utilize the cooperation of first outer taper surface and second outer taper surface and realize the back and forth limit adjustment of floating block, change the compression to spring, thereby adjust the spring elasticity loading to slip ring and moving ring.

Description

Technical Field

[0001] This utility model relates to the field of mechanical seal technology, and in particular to a mechanical seal elasticity adjustment mechanism. Background Technology

[0002] The elastic loading mechanism of mechanical seals typically uses bellows or springs to keep the end faces of the dynamic ring and stationary ring in contact and allow them to slide relative to each other, thus forming a mechanical seal device that prevents fluid leakage.

[0003] When a spring is used as a spring force loading mechanism, the spring force cannot usually be adjusted. When the end faces of the moving ring and stationary ring are worn or the spring force is weakened, the only option is usually to replace the spring or the moving ring and stationary ring. This is costly and cumbersome to disassemble and assemble, and therefore requires improvement. Utility Model Content

[0004] The purpose of this invention is to provide a spring force adjustment mechanism for mechanical seals, thereby adjusting the spring force and reducing maintenance costs.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A mechanical seal elastic adjustment mechanism includes: a bushing, a spring, a limiting ring, a slip ring, a stud, a rotating ring, and a stationary ring. The limiting ring is concentrically sleeved on the bushing, and the slip ring is concentrically sleeved on the bushing and located in front of the limiting ring. The front of the limiting ring is provided with guide holes pointing towards the slip ring at intervals. A floating block is disposed in the guide holes. The spring is disposed between the floating block and the slip ring. The rear end of the floating block is concentrically provided with a first outer conical surface. The outer wall of the limiting ring is provided with a threaded hole pointing towards the first outer conical surface. The stud is disposed in the threaded hole, and the end of the stud is provided with a second outer conical surface that contacts the first outer conical surface. The rotating ring is disposed at the front end of the slip ring, and the stationary ring is disposed in front of the rotating ring.

[0007] The bushing is provided with a retaining ring located behind the limiting ring.

[0008] The front end face of the moving ring contacts the rear end face of the stationary ring to achieve end face sealing.

[0009] The slip ring has a guide rod that passes through the spring and the floating block on its back, and the floating block has a first through hole corresponding to the guide rod.

[0010] The limiting ring has a second through hole on its back corresponding to the guide rod.

[0011] The slip ring has a recessed groove on its front side, and the moving ring has a connecting sleeve extending into the groove on its back side.

[0012] A sealing ring is provided between the inner side of the connecting sleeve and the outer wall of the bushing.

[0013] The beneficial effects of this utility model are as follows: A mechanical seal elasticity adjustment mechanism can adjust the front and rear limits of the floating block by turning the stud and utilizing the cooperation of the first and second outer conical surfaces. This changes the compression of the spring, thereby adjusting the elasticity loading of the spring on the slip ring and the moving ring to adapt to the wear of the end faces of the moving ring and the stationary ring or the weakening of the spring elasticity, thus extending the service life of the mechanical seal. It is easy to operate and reduces maintenance costs. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 yes Figure 1 A schematic diagram of the structure of part A. Detailed Implementation

[0016] The following is combined Figures 1-2 The technical solution of this utility model will be further illustrated through specific embodiments.

[0017] like Figure 1 The mechanical seal spring adjustment mechanism shown includes: a bushing 1, a spring 3, a limiting ring 2, a slip ring 4, a stud 8, a moving ring 5, and a stationary ring 6. The limiting ring 2 is concentrically fitted onto the bushing 1, facilitating assembly. A retaining ring 10 is provided on the bushing 1, located behind the limiting ring 2. The retaining ring 10 and the bushing 1 are made of an integrated steel structure, providing high strength. The retaining ring 10 limits the backward movement of the limiting ring 2, improving its stability.

[0018] The slip ring 4 is concentrically fitted onto the bushing 1 and located in front of the limiting ring 2. The moving ring 5 is located at the front end of the slip ring 4. In this embodiment, the slip ring 4 has a recessed annular groove 11 on its front side, and the moving ring 5 has an integrally formed connecting sleeve 12 extending into the annular groove 11 on its back side, which facilitates assembly and improves concentricity.

[0019] like Figure 1 As shown, a sealing ring 13 is provided between the inner side of the connecting sleeve 13 and the outer wall of the bushing 1 to seal the inner side of the connecting sleeve 13 and the outer wall of the bushing 1, thus preventing leakage. The stationary ring 6 is located in front of the rotating ring 5, and the front end face of the rotating ring 5 contacts the rear end face of the stationary ring 6 to achieve end face sealing.

[0020] In order to apply elastic loading to the moving ring 5, the front of the limiting ring 2 is provided with guide holes 14 pointing to the slip ring 4. A floating block 9 is provided in the guide hole 14. The spring 3 is provided between the floating block 9 and the slip ring 4. The spring 3 applies elastic loading to the slip ring 4 and the moving ring 5 to ensure the contact stability between the front end face of the moving ring 5 and the tail end face of the stationary ring 6.

[0021] like Figure 1 As shown, a guide rod 7 is provided on the back of the slip ring 4, passing through the spring 3 and the floating block 9. The floating block 9 has a first through hole 16 corresponding to the guide rod 7, facilitating assembly. The back of the limiting ring 2 has a second through hole corresponding to the guide rod 7, guiding the guide rod 7. The guide rod 7 is welded and fixed to the back of the slip ring 4, resulting in a robust structure. The guide rod 7 guides the extension and retraction of the spring 3, preventing the spring 3 from flying off.

[0022] In order to adjust the extension and retraction of the spring 3, a first outer conical surface 15 is concentrically provided at the rear end of the floating block 9. A threaded hole 18 pointing to the first outer conical surface 15 is provided on the outer wall of the limiting ring 2. The stud 8 is provided in the threaded hole 18. A cross groove is provided at the outer end of the stud 8. It can be rotated by a screwdriver to realize the axial movement of the stud 8 in the threaded hole 18.

[0023] like Figure 2 As shown, the end of the stud 8 is provided with a second outer conical surface 17 that contacts the first outer conical surface 15. By rotating the stud 8, the front and rear limit adjustment of the floating block 9 can be achieved through the cooperation of the first outer conical surface 15 and the second outer conical surface 17, thereby changing the compression stroke of the spring 3 and adjusting the elastic force loading of the spring 3 on the slip ring 4 and the moving ring 5 to adapt to the end face wear of the moving ring 5 and the stationary ring 6 or the weakening of the elastic force of the spring 3, making maintenance convenient.

[0024] 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 mechanical seal spring force adjustment mechanism characterized by, include: The device comprises a bushing, a spring, a limiting ring, a slip ring, a stud, a moving ring, and a stationary ring. The limiting ring is concentrically fitted onto the bushing. The slip ring is concentrically fitted onto the bushing and located in front of the limiting ring. The front of the limiting ring has guide holes spaced apart, pointing towards the slip ring. A floating block is disposed in the guide holes. The spring is disposed between the floating block and the slip ring. The rear end of the floating block has a first outer conical surface concentrically provided. The outer wall of the limiting ring has a threaded hole pointing towards the first outer conical surface. The stud is disposed in the threaded hole. The end of the stud has a second outer conical surface that contacts the first outer conical surface. The moving ring is located at the front end of the slip ring, and the stationary ring is located in front of the moving ring.

2. The mechanical seal spring force adjustment mechanism of claim 1, wherein, The bushing is provided with a retaining ring located behind the limiting ring.

3. The mechanical seal elasticity adjustment mechanism according to claim 1, characterized in that, The front end face of the rotating ring contacts the rear end face of the stationary ring to achieve end face sealing.

4. The mechanical seal elasticity adjustment mechanism according to claim 1, characterized in that, The slip ring has a guide rod that passes through the spring and the floating block on its back, and the floating block has a first through hole corresponding to the guide rod.

5. The mechanical seal elasticity adjustment mechanism according to claim 4, characterized in that, The back of the limiting ring is provided with a second through hole corresponding to the guide rod.

6. The mechanical seal elasticity adjustment mechanism according to claim 1, characterized in that, The slip ring has a recessed groove on its front side, and the moving ring has a connecting sleeve extending into the groove on its back side.

7. The mechanical seal elasticity adjustment mechanism according to claim 6, characterized in that, A sealing ring is provided between the inner side of the connecting sleeve and the outer wall of the bushing.

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