CN210566251U - Mechanical shaft seal with auxiliary seal - Google Patents

Abstract

The utility model relates to a mechanical shaft seal with supplementary seal, establish the quiet ring in the pivot including the cover, quiet ring cover, the rotating ring cover, bellows and fixed cover, quiet ring inlays to be established on quiet ring cover, the rotating ring inlays to be established on the rotating ring cover, and the top of rotating ring offsets with the terminal surface of quiet ring, fixed cover passes through the bellows and links to each other with the rotating ring cover, be equipped with the embedded groove on the terminal surface in the shaft hole of fixed cover, the embedded auxiliary seal circle that has, the auxiliary seal circle includes that at least one cross-section is the sealing ring of "L" shape and imbeds the embedding head ring in the embedded groove, the sealing ring top is the circular arc excessive, and be equipped with the elastic component between sealing ring and the embedding head. The utility model discloses a set up exclusive auxiliary seal circle on fixed sheathe in, can avoid the medium to ooze from fixed cover and pivot between and influence the liquid film balance that the terminal surface of rotating ring and quiet ring was maintained to solve the technical problem in the technical background, improve the sealed effect and the life of bearing seal.

Description

Mechanical shaft seal with auxiliary seal

Technical Field

The utility model relates to a mechanical seal technical field, concretely relates to mechanical shaft seal with auxiliary seal.

Background

The shaft seal is generally used to prevent fluid leakage between the shaft of the fluid transfer device and the bearing, and a sealing effect is achieved by interference fit between the lip of the shaft seal and the shaft of the device. The existing mechanical shaft seal generally comprises a static ring, a static ring sleeve, a movable ring sleeve, a corrugated pipe and a fixed sleeve, when in use, the static ring and the static ring sleeve keep relatively static with a pump body, the movable ring sleeve, the corrugated pipe and the fixed sleeve rotate synchronously with a rotating shaft, an extremely thin liquid film is maintained between the end surfaces of the movable ring and the static ring, the liquid film has hydrodynamic pressure and static pressure, the functions of lubrication and balance pressure are achieved, the sealing purpose is achieved, the shaft seal sealing effect of the structure is poor, particularly after long-term use, a medium seeps out from the position between the fixed sleeve and the rotating shaft, the liquid film maintaining between the end surfaces of the movable ring and the static ring is influenced, the sealing effect is reduced, even the leakage problem is caused, and the.

SUMMERY OF THE UTILITY MODEL

To the not enough in the background art, the utility model provides a mechanical shaft seal with supplementary seal.

The utility model adopts the technical proposal that: the utility model provides a mechanical shaft seal with supplementary sealed, establishes quiet ring, quiet ring cover, rotating ring cover, bellows and fixed cover in the pivot including the cover, quiet ring inlay and establish on quiet ring cover, the rotating ring inlay and establish on the rotating ring cover, and the top of rotating ring offsets with the terminal surface of quiet ring, fixed cover pass through the bellows and link to each other with the rotating ring cover, be equipped with the embedded groove on the terminal surface in the shaft hole of fixed cover, the embedded supplementary sealing washer that has, supplementary sealing washer include that at least one cross-section is the sealing ring of "L" shape and imbeds the embedding head ring in the embedded groove, the sealing ring top is the circular arc excessive, and is equipped with the elastic component between sealing ring and the embedding head ring.

Furthermore, the width of the outer ring of the embedded head ring is larger than that of the inner ring, and the inner ring and the outer ring are excessively connected by adopting an arc.

Furthermore, a first positioning groove is formed in the surface of the sealing ring on the side, away from the arc transition side, of the sealing ring, a second positioning groove is formed in the surface of the embedding head ring, opposite to the first positioning groove, of the sealing ring, and the elastic piece is installed between the first positioning groove and the second positioning groove.

Further, the elastic member is a coil spring.

Furthermore, the fixing sleeve is provided with a fixing hole.

Furthermore, the fixed sleeve, the corrugated pipe and the movable ring sleeve are of an integrally formed structure.

Furthermore, the movable ring sleeve is provided with a ring groove for clamping the movable ring.

Furthermore, a convex ring is arranged on the periphery of the static ring sleeve.

The utility model has the advantages that: the utility model has the advantages that: the utility model discloses a set up exclusive auxiliary seal circle on fixed sheathe in, can avoid the medium to ooze from fixed cover and pivot between and influence the liquid film balance that the terminal surface of rotating ring and quiet ring was maintained to solve the technical problem in the technical background, improve the sealed effect and the life of bearing seal, have simple structure, sealed effectual, long service life's advantage.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic cross-sectional view of the auxiliary seal ring.

Fig. 3 is an enlarged view of a portion a in fig. 2.

Fig. 4 is a schematic structural view of the auxiliary seal ring.

In the figure: 1. a rotating shaft; 2. a stationary ring; 3. a static ring sleeve; 4. a moving ring; 5. a movable ring sleeve; 6. a bellows; 7. fixing a sleeve; 8. a groove is embedded; 9. an auxiliary seal ring; 10. a seal ring; 11. an insert head ring; 12. arc transition; 13. an elastic member; 14. an outer ring; 15. an inner ring; 16. a first positioning groove; 17. a second positioning groove; 18. a fixing hole; 19. a ring groove; 20. a convex ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides a mechanical shaft seal with supplementary seal.

In this embodiment, referring to fig. 1 to 4, the mechanical shaft seal with auxiliary seal includes a stationary ring 2, a stationary ring sleeve 3, a moving ring 4, a moving ring sleeve 5, a bellows 6, and a fixed sleeve 7, which are sleeved on a rotating shaft 1, the stationary ring 2 is embedded in the stationary ring sleeve 3, the moving ring 4 is embedded in the moving ring sleeve 5, the top of the moving ring 4 abuts against the end surface of the stationary ring 2, the fixed sleeve 5 is connected with the moving ring sleeve 7 through the bellows 6, an embedded groove 8 is provided on the inner end surface of a shaft hole of the fixed sleeve, an auxiliary seal ring 9 is embedded in the embedded groove 8, the auxiliary seal ring 9 includes at least one seal ring 10 having an "L" shaped cross section and an embedded head ring 11 embedded in the embedded groove, the top of the seal ring 10 is an arc transition 12, and an elastic member 13 is provided between the seal ring and the embedded head ring.

The sealing performance between the fixed sleeve and the rotating shaft is improved by arranging the auxiliary sealing ring, the influence on the liquid film balance between the movable ring and the static ring caused by the mixing of a medium is avoided, and the sealing effect is improved. The auxiliary sealing ring can be made of hydrogenated nitrile rubber or polytetrafluoroethylene materials, and the arrangement of the elastic piece can increase the radial elasticity of the sealing ring and improve the sealing effect.

The width of the outer ring 14 of the embedded head ring 11 is larger than that of the inner ring 15, and the inner ring and the outer ring are connected excessively by adopting an arc. Most seal rings are generally mounted and fixed by a T-shaped groove, but the seal ring with a T-shaped structure is inconvenient to mount, and the embedded head ring with the structure is easier to assemble compared with the T-shaped structure.

A first positioning groove 16 is formed in the surface of the sealing ring 10 on the side, away from the arc transition 12, of the sealing ring, a second positioning groove 17 is formed in the surface, opposite to the first positioning groove 16, of the embedded head ring 11, and the elastic part is installed between the first positioning groove 16 and the second positioning groove 17; the elastic piece 13 is a spiral spring; through the setting of first constant head tank and second constant head tank, can improve the stability of elastic component installation.

The fixing sleeve 7 is provided with a fixing hole 18; the fixed sleeve, the corrugated pipe and the movable ring sleeve are of an integrally formed structure. The fixed sleeve, the corrugated pipe and the movable ring sleeve which are of an integrated structure have better mechanical strength, are convenient for batch production and improve the production effect.

The movable ring sleeve is provided with a ring groove 19 for clamping the movable ring; the periphery of the static ring sleeve is provided with a convex ring 20.

The utility model has the advantages that: the utility model discloses a set up exclusive auxiliary seal circle on fixed sheathe in, can avoid the medium to ooze from fixed cover and pivot between and influence the liquid film balance that the terminal surface of rotating ring and quiet ring was maintained to solve the technical problem in the technical background, improve the sealed effect and the life of bearing seal, have simple structure, sealed effectual, long service life's advantage.

The skilled person should understand that: although the present invention has been described in terms of the above embodiments, the inventive concepts are not limited to the embodiments, and any modifications that utilize the inventive concepts are intended to be included within the scope of the appended claims.

Claims (8)

1. The utility model provides a mechanical shaft seal with supplementary seal, establishes quiet ring, quiet ring cover, rotating ring cover, bellows and fixed cover in the pivot including the cover, quiet ring inlay and establish on quiet ring cover, the rotating ring inlay and establish on the rotating ring cover, and the top of rotating ring offsets with the terminal surface of quiet ring, fixed cover link to each other its characterized in that through bellows and rotating ring cover: be equipped with the embedded groove on the shaft hole inner end face of fixed cover, the embedded supplementary sealing washer that has inlayed of embedded groove, supplementary sealing washer include that at least one cross-section is the sealing ring of "L" shape and imbeds the embedding headring in the embedded groove, the sealing ring top is the circular arc excessive, and is equipped with the elastic component between sealing ring and the embedding headring.

2. Mechanical shaft seal with secondary seal according to claim 1, characterized in that: the width of the outer ring of the embedded head ring is larger than that of the inner ring, and the inner ring and the outer ring are connected excessively by adopting an arc.

3. Mechanical shaft seal with secondary seal according to claim 1 or 2, characterized in that: the sealing ring surface that deviates from the excessive one side of circular arc is equipped with first constant head tank, just is equipped with the second constant head tank on the embedding head ring surface in first constant head tank, the elastic component is installed between first constant head tank and second constant head tank.

4. Mechanical shaft seal with secondary seal according to claim 3, characterized in that: the elastic piece is a spiral spring.

5. Mechanical shaft seal with secondary seal according to claim 1, characterized in that: the fixing sleeve is provided with a fixing hole.

6. Mechanical shaft seal with secondary seal according to claim 1 or 2 or 5, characterized in that: the fixed sleeve, the corrugated pipe and the movable ring sleeve are of an integrally formed structure.

7. Mechanical shaft seal with secondary seal according to claim 6, characterized in that: and the movable ring sleeve is provided with a ring groove for clamping the movable ring.

8. Mechanical shaft seal with secondary seal according to claim 6, characterized in that: and a convex ring is arranged on the periphery of the static ring sleeve.

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