CN217898780U

CN217898780U - Rubber bellows mechanical seal spare

Info

Publication number: CN217898780U
Application number: CN202221578439.9U
Authority: CN
Inventors: 仇栋; 张竺翔; 邬晨晖
Original assignee: Ningbo Anmu Sealing Technology Co ltd
Current assignee: Ningbo Anmu Sealing Technology Co ltd
Priority date: 2022-06-22
Filing date: 2022-06-22
Publication date: 2022-11-25
Anticipated expiration: 2032-06-22

Abstract

The utility model relates to a mechanical seal technical field discloses a rubber bellows mechanical seal spare, including: a shaft sleeve; the corrugated pipe, the moving ring and the static ring are sequentially arranged along the length direction of the shaft sleeve, the corrugated pipe, the moving ring and the static ring are all sleeved on the shaft sleeve, and the corrugated pipe, the moving ring and the static ring are sequentially abutted; the movable ring seat is sleeved on one end of the corrugated pipe; the movable ring seat is sleeved on the end of the bellows, which is far away from the movable ring seat. The utility model has the advantages that the mechanical sealing element of the rubber corrugated pipe connects the shaft sleeve and the movable ring through the corrugated pipe, one end of the corrugated pipe is propped against the shaft sleeve, and the other end is propped against the movable ring, so that the sealing area between the movable assembly and the shaft sleeve is increased; because the rubber corrugated pipe is sealed in a totally-enclosed structure, and the corrugated pipe is supported on the shaft sleeve through the spring seat, the movable ring seat and the spring arranged between the spring seat and the movable ring seat, the sealing performance between one end of the corrugated pipe and the shaft sleeve is further ensured.

Description

Rubber bellows mechanical seal spare

Technical Field

The utility model relates to a mechanical seal technical field especially relates to a rubber bellows mechanical seal.

Background

Mechanical seals are widely used in pumps, compressors, and mixing machines. The leakage path between a rotating part (such as a rotating shaft) and a static structure cavity is cut off, and harmful media in the cavity are prevented from leaking to the outside. The mechanical seal is typically comprised of a moving component fixed to the shaft and a stationary component fixed to the housing.

The common mechanical seal is a common mechanical seal structure and comprises a seal ring, a pressure element, a pair of metal seats capable of transmitting torque, a spring seat and a seal ring; the static assembly is relatively simple and consists of a static ring and a rubber sealing element sleeved in the groove. The dynamic ring and the static ring are a pair of friction pairs with high flatness, and form a sealing surface under the action of a pressure element. The clearance between the two parts in relative rotation is in the micrometer order, so that the internal fluid can be effectively prevented from leaking from the sealing surface. The spring of the movable assembly is compressed during installation to provide a positive pressure on the sealing surfaces. The positive pressure must counteract the thrust force caused by the fluid pressure inside the seal to keep the seal faces closed. If the mechanical seal rubber O-RING sealing surface in the sealing cavity is too small, the sealing element can be gradually disabled along with the accumulation of impurities in the mechanical seal medium.

SUMMERY OF THE UTILITY MODEL

The aforesaid that exists to prior art is not enough, the utility model aims to solve the technical problem that a sealed big, sealed effectual rubber bellows mechanical seal spare of face is proposed.

The utility model provides a technical scheme that its technical problem adopted is, provides a rubber bellows mechanical seal spare, including:

a shaft sleeve;

the corrugated pipe, the movable ring and the static ring are sequentially arranged along the length direction of the shaft sleeve, the corrugated pipe, the movable ring and the static ring are sleeved on the shaft sleeve, and the corrugated pipe, the movable ring and the static ring are sequentially abutted;

the movable ring seat is sleeved on one end of the corrugated pipe;

the movable ring seat is sleeved on the end, far away from the movable ring seat, of the corrugated pipe.

Furthermore, the corrugated pipe structure further comprises a gasket, a convex edge is arranged at one end of the shaft sleeve, the corrugated pipe, the gasket and the convex edge are sequentially abutted, a sleeve joint part is arranged at one end, away from the convex edge, of the corrugated pipe, and the end face and the side face of the movable ring can be abutted to the sleeve joint part.

Furthermore, the outer side of the sleeving part is provided with a protrusion, the movable ring seat is abutted to the protrusion, one end, far away from the protrusion, of the corrugated pipe is provided with a first clamping groove, the spring seat is clamped in the first clamping groove, and the spring is wound between the spring seat and the movable ring seat.

Furthermore, a first extending part is arranged on the spring seat, a second extending part is arranged on the movable ring seat, and two ends of the spring respectively support against the first extending part and the second extending part.

Further, still include gland and snap ring, the snap ring sets up keep away from on the axle sleeve the one end on protruding edge, the gland cover is established on the quiet ring, just the gland sets up quiet ring with between the snap ring.

Furthermore, a threaded hole is formed in the shaft sleeve, the stop ring is connected with the shaft sleeve through a screw, and one end of the screw penetrates through the threaded hole.

The first sealing ring is sleeved on the static ring and is positioned between the static ring and the gland; one end of the gland abuts against the sealing ring, and the other end of the gland abuts against the stop ring.

Furthermore, the sealing device further comprises a second sealing ring, a second clamping groove is formed in one end, close to the convex edge, of the inner side of the shaft sleeve, and the second sealing ring is clamped in the second clamping groove.

Further, still include the third sealing washer, be equipped with the third draw-in groove on the periphery wall of gland, the third sealing washer card is established in the third draw-in groove.

Compared with the prior art, the utility model discloses following beneficial effect has at least:

in the utility model, the mechanical sealing element of the rubber corrugated pipe is connected with the shaft sleeve and the movable ring through the corrugated pipe, one end of the corrugated pipe is propped against the shaft sleeve, and the other end is propped against the movable ring, so that the sealing area between the movable component and the shaft sleeve is increased; because the rubber corrugated pipe is sealed in a self-closed structure, and the corrugated pipe is propped against the shaft sleeve through the spring seat, the movable ring seat and the spring arranged between the spring seat and the movable ring seat, the sealing property between one end of the corrugated pipe and the shaft sleeve is ensured, the other end of the corrugated pipe has floatability, so that the movable ring and the static ring are tightly attached, and the rubber O-ring of the movable ring and the shaft sleeve which are necessary in common spring sealing is eliminated structurally; the elasticity of the corrugated pipe is fully utilized to form specific pressure (part of balance force is consumed when relative displacement occurs in the movable ring shaft sleeve of the common O-ring seal, the friction force between the seal ring and the shaft sleeve causes the displacement of the seal ring, and the seal ring cannot be reset in time after the end face is opened in work, so that leakage is caused).

Drawings

FIG. 1 is a schematic structural view of a rubber bellows mechanical sealing element of the present invention mounted on a rotating shaft;

FIG. 2 is a schematic view of the bellows mechanism;

fig. 3 is a schematic structural view of the bushing.

In the figure:

1. a rotating shaft; 2. a shaft sleeve; 3. a bellows; 4. a moving ring; 5. a stationary ring; 6. a movable ring seat; 7. a spring seat; 8. a spring; 9. a gasket; 10. a convex edge; 11. a socket joint part; 12. a protrusion; 13. a first card slot; 14. a first extension portion; 15. a second extension portion; 16. a gland; 17. a snap ring; 18. a threaded hole; 19. a screw; 20. a first seal ring; 21. a second seal ring; 22. a second card slot; 23. a third seal ring; 24. a third card slot; 25. and (4) a screw.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1-3, a mechanical seal for rubber bellows 3 comprises: a shaft sleeve 2; the corrugated pipe 3, the movable ring 4 and the static ring 5 are sequentially arranged along the length direction of the shaft sleeve 2, the corrugated pipe 3, the movable ring 4 and the static ring 5 are all sleeved on the shaft sleeve 2, and the corrugated pipe 3, the movable ring 4 and the static ring 5 are sequentially abutted; the movable ring seat 6 is sleeved on one end of the corrugated pipe 3; the corrugated pipe comprises a spring seat 7 and a spring 8 sleeved on the spring seat 7, wherein the spring seat 7 is sleeved on one end of the corrugated pipe 3 far away from the movable ring seat 6.

Specifically, the shaft sleeve 2 is used for being sleeved on a rotating part (such as the rotating shaft 1) and rotating along with the rotating shaft 1; according to the scheme, the corrugated pipe 3, the movable ring 4 and the static ring 5 are sequentially sleeved on the shaft sleeve 2, the movable ring 4 is connected with the shaft sleeve 2 through the corrugated pipe 3, the sealing surface between the movable assembly and the shaft sleeve 2 is enlarged, and the sealing effect is improved; the corrugated pipe 3 has elasticity, the spring 8 is sleeved on the corrugated pipe 3, the sealing performance between one end of the corrugated pipe 3 and the shaft sleeve 2 is improved, the inner diameters of the corrugated pipe 3 and the movable ring 4 are larger than the outer diameter of the shaft sleeve 2, the movable ring 4 abutted against the other end of the corrugated pipe 3 has floatability, and the requirements on the parallelism and the smoothness of the movable ring 4 and the performance of the spring 8 are reduced.

In this embodiment, the mechanical sealing element of the rubber corrugated pipe 3 further includes a gasket 9, a convex edge 10 is arranged at one end of the shaft sleeve 2, the corrugated pipe 3, the gasket 9 and the convex edge 10 are sequentially abutted against each other, a sleeve portion 11 is arranged at one end of the corrugated pipe 3 far away from the convex edge 10, and both the end face and the side face of the movable ring 4 can abut against the sleeve portion 11. One end of the corrugated pipe 3 is propped against the shaft sleeve 2 through a gasket 9, the other end of the corrugated pipe 3 is propped against the movable ring 4, the corrugated pipe 3 is provided with a sleeving part 11, and the movable ring 4 is sleeved in the corrugated pipe 3; the end face and the side face of the movable ring 4 are both abutted against the sleeving part 11, so that the fixing stability of the movable ring 4 is ensured.

The outer side of the sleeve joint part 11 is provided with a protrusion 12, the movable ring seat 6 abuts against the protrusion 12, one end, far away from the protrusion 12, of the corrugated pipe 3 is provided with a first clamping groove 13, the spring seat 7 is clamped in the first clamping groove 13, and the spring 8 is wound between the spring seat 7 and the movable ring seat 6. That is, the spring 8 is disposed along the length direction of the bellows 3, so that the bellows 3 is contracted inward, and the sealing property between the bellows 3 and the shaft housing 2 is ensured. The spring seat 7 is provided with a first extending portion 14, the moving ring seat 6 is provided with a second extending portion 15, and two ends of the spring 8 respectively abut against the first extending portion 14 and the second extending portion 15, so that the fixation firmness of the spring 8 is ensured.

The mechanical sealing element of the rubber corrugated pipe 3 further comprises a gland 16 and a stop ring 17, wherein the stop ring 17 is arranged at one end, far away from the convex edge 10, of the shaft sleeve 2, the gland 16 is sleeved on the static ring 5, and the gland 16 is arranged between the static ring 5 and the stop ring 17. In practical use, a threaded hole 18 is formed in the shaft sleeve 2, the stop ring 17 is connected with the shaft sleeve 2 through a screw 19, and one end of the screw 19 penetrates through the threaded hole 18; that is, the stop ring 17 is fixed on the shaft sleeve 2 through the screw 19, the stop ring 17 rotates with the shaft sleeve 2, and the gland 16 presses the stationary ring 5 against the movable ring 4.

In this embodiment, the mechanical sealing element of the rubber bellows 3 further includes a first sealing ring 20, and the first sealing ring 20 is sleeved on the stationary ring 5 and is located between the stationary ring 5 and the gland 16; one end of the gland 16 abuts against the sealing ring, and the other end abuts against the stop ring 17. That is, the first seal ring 20 ensures the sealing property between the gland 16 and the stationary ring 5.

The mechanical sealing element of the rubber corrugated pipe 3 further comprises a second sealing ring 21 and a third sealing ring 23, a second clamping groove 22 is formed in one end, close to the convex edge 10, of the inner side of the shaft sleeve 2, the second sealing ring 21 is clamped in the second clamping groove 22, and the second sealing ring 21 ensures the sealing performance between the shaft sleeve 2 and the rotating shaft 1; be equipped with third draw-in groove 24 on the periphery wall of gland 16, third sealing washer 23 card is established in third draw-in groove 24, gland 16 passes through the screw 25 and is connected with static structure cavity, can guarantee the leakproofness between the two through third sealing washer 23.

During actual installation, the spring seat 7, the moving ring seat 6, the spring 8 and the like are sleeved on the corrugated pipe 3, the corrugated pipe 3 is sleeved on the shaft sleeve 2 sleeved with the gasket 9, the moving ring 4 is clamped between the shaft sleeve 2 and the corrugated pipe 3, then the static ring 5 and the first sealing ring 20 are sequentially installed, the gland 16 sleeved with the third sealing ring 23 abuts against the static ring 5, the stop ring 17 is fixed on the shaft sleeve 2 through the screw 19, the static ring 5 abuts against the moving ring 4, and finally the second sealing ring 21 is clamped on the inner side of the shaft sleeve 2.

In the scheme, in order to prevent the leakage problem caused by the over-small sealing surface of the ordinary rubber O-RING, the mechanical sealing element of the rubber corrugated pipe 3 connects the movable RING 4 with the shaft sleeve 2 through the corrugated pipe 3, and the sealing and moving group of the sleeve machine adopts the rubber corrugated pipe 3, thereby greatly improving the sealing effect compared with the rubber O-RING and having the floatability superior to the O-RING; and the bellows 3 is sleeved with the spring 8, and the elasticity of the bellows 3 is combined, so that the end face can be timely reset after being opened in work, the leakage risk is eliminated, and the sealing performance is ensured.

It should be noted that all the directional indicators (such as up, down, left, right, front, back, 8230; \8230;) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the attached drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

Furthermore, the descriptions of the embodiments as "first," "second," "a," etc. in this disclosure are for descriptive purposes only and are not to be construed as indicating or implying relative importance or to imply that the number of the indicated features is indicative. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In addition, the technical solutions of the embodiments of the present invention can be combined with each other, but it is necessary to use a person skilled in the art to realize the basis, and when the technical solutions are combined and contradictory to each other or cannot be realized, the combination of the technical solutions should not exist, and is not within the protection scope of the present invention.

Claims

1. A rubber bellows mechanical seal, characterized by, including:

a shaft sleeve;

the movable ring seat is sleeved on one end of the corrugated pipe;

2. A rubber bellows mechanical seal part according to claim 1, further comprising a gasket, wherein one end of the shaft sleeve is provided with a convex edge, the bellows, the gasket and the convex edge are abutted in sequence, a sleeve joint part is arranged at one end of the bellows away from the convex edge, and both the end surface and the side surface of the movable ring can abut against the sleeve joint part.

3. A rubber bellows mechanical seal according to claim 2, wherein a protrusion is provided on an outer side of the sleeve portion, the movable ring seat abuts against the protrusion, a first engaging groove is provided at an end of the bellows away from the protrusion, the spring seat is engaged with the first engaging groove, and the spring is wound around between the spring seat and the movable ring seat.

4. A rubber bellows mechanical seal according to claim 3, wherein a first extension portion is provided on said spring seat, a second extension portion is provided on said movable ring seat, and both ends of said spring respectively abut against said first extension portion and said second extension portion.

5. A rubber bellows mechanical seal of claim 2, further comprising a gland and a stop ring, wherein the stop ring is disposed on an end of the shaft sleeve away from the protruding edge, the gland is sleeved on the stationary ring, and the gland is disposed between the stationary ring and the stop ring.

6. A rubber bellows mechanical seal according to claim 5, wherein a threaded hole is provided in said bushing, said stop ring is connected to said bushing by a screw, and one end of said screw is inserted into said threaded hole.

7. A rubber bellows mechanical seal of claim 5, further comprising a first seal ring disposed on the stationary ring and between the stationary ring and the gland; one end of the gland abuts against the sealing ring, and the other end of the gland abuts against the stop ring.

8. A rubber bellows mechanical seal according to claim 2, further comprising a second seal ring, wherein a second engaging groove is formed at an end of the inner side of the shaft sleeve near the protruding edge, and the second seal ring is engaged with the second engaging groove.

9. A rubber bellows mechanical seal of claim 5, further comprising a third seal ring, wherein a third groove is formed on the outer peripheral wall of the gland, and the third seal ring is clamped in the third groove.