CN209818735U

CN209818735U - Double-end-face mechanical sealing element

Info

Publication number: CN209818735U
Application number: CN201920440281.0U
Authority: CN
Inventors: 戴志能
Original assignee: NINGBO JINGKE MACHINERY SEAL MANUFACTURING Co Ltd
Current assignee: NINGBO JINGKE MACHINERY SEAL MANUFACTURING Co Ltd
Priority date: 2019-04-02
Filing date: 2019-04-02
Publication date: 2019-12-20
Anticipated expiration: 2029-04-02

Abstract

The utility model provides a double mechanical seal spare relates to mechanical seal's technical field, aim at solving current mechanical seal spare and appear the uneven, the relatively poor problem of sealed effect of compensation volume easily at the rotation in-process of axle sleeve, its including the cover locate the epaxial transmission seat of rotation, along the axial of rotation axis slide set up in the rotating ring, the top at transmission seat both ends are located a plurality of elastic components between the rotating ring, with the rotating ring offsets tight quiet ring, quiet ring is kept away from the one end of rotating ring supports respectively and locates on the casing of difference, the transmission seat is fixed in on the rotation axis. The utility model has the advantages of even compensation amount and good sealing effect.

Description

Double-end-face mechanical sealing element

Technical Field

The utility model belongs to the technical field of mechanical seal's technique and specifically relates to a double mechanical seal spare is related to.

Background

The mechanical seal is a device for preventing fluid leakage, which is formed by at least one pair of end faces perpendicular to the rotation axis, and the end faces are kept in fit and relatively slide under the action of fluid pressure and the elastic force (or magnetic force) of a compensation mechanism and the matching of auxiliary sealing. The double-end-face mechanical sealing element generally has two end-face seals, if the first-stage seal fails, the second-stage seal can still be sealed, and the double-end-face mechanical sealing element is favored in occasions with higher sealing requirements.

The utility model with the bulletin number of CN202674320U discloses a novel double-end-face mechanical sealing element, which comprises a movable ring, a stationary ring, a shaft sleeve, a spring seat, a gland and a sealing bin, wherein the center of the outer side of the shaft sleeve is fixed with the spring seat; two end faces of the sealed bin are respectively provided with a gland; and a leakage recovery hole is formed in the shell of the sealed bin.

The utility model discloses above-mentioned simple structure pushes away the rotating ring seat at its both ends through the flexible top of spring, utilizes the rotating ring seat top to push away the rotating ring and make it hug closely the quiet ring and rotate to form sealedly at the both ends of spring holder.

However, the mechanism for realizing the buffer compensation in the double-end-face mechanical sealing element in the prior art is a single spring sleeved on the spring seat, the elasticity of the single spring is poor, and the single spring and the main supporting points between the spring seat and the movable ring seat at the two ends of the single spring are only one, so that the phenomenon of uneven compensation amount is easy to occur in the rotation process of the shaft sleeve, and the sealing effect of the sealing element is poor.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a double mechanical seal spare, it has that the offset is even, sealed effectual advantage.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:

the utility model provides a double mechanical seal spare, locates the transmission seat on the rotation axis including the cover, along the axial of rotation axis slide set up in the rotating ring, the top at transmission seat both ends are located a plurality of elastic components between the rotating ring, with the quiet ring that the rotating ring offsets tightly, quiet ring is kept away from the one end of rotating ring supports respectively on locating different casings, the transmission seat is fixed in on the rotation axis.

Through adopting above-mentioned technical scheme, quiet ring supports to be located and keeps static on the casing, when the rotation axis rotated, drives the transmission seat and the quiet ring that are fixed in on the rotation axis and rotates together. When the inside pressure of two casings promoted its quiet ring that corresponds the side to the opposite side when removing, the quiet ring extrusion rotating ring of this side, rotating ring extrusion elastic component, elastic component takes place deformation and compensates the displacement of quiet ring, and make quiet ring resume the normal position rapidly under the effect of elastic force, thereby realize the sealed between casing and the rotation axis, elastic component between the rotating ring in the above-mentioned structure is equipped with many places, consequently, the contact point between elastic component and the rotating ring is more, no matter which direction of rotating ring is upwards pressurized, the elastic component of this side can both compensate the displacement of rotating ring through the deformation of self, the compensation volume is even, it is sealed effectual.

The utility model discloses further set up to: the transmission seat comprises an accommodating barrel parallel to the axial direction of the transmission seat and a spacer ring connected to the center of the accommodating barrel, the shape of the axial single-side cross section of the whole transmission seat is T-shaped, the outer ring of the spacer ring is integrally connected with the accommodating barrel, the inner ring of the spacer ring is supported on the rotating shaft, a screw hole perpendicular to the axial direction of the transmission seat is arranged in the middle of the transmission seat, and the screw hole penetrates through the transmission seat.

Through adopting above-mentioned technical scheme, during actual assembly, screw in the screw, the tip of screw runs through the transmission seat and twists in the rotation axis to realize the assembly to the transmission seat, make the transmission seat along with the rotation axis corotation.

The utility model discloses further set up to: the elastic piece is a spring column, the spacer ring is provided with a compensation perforation parallel to the axial direction of the transmission seat, the compensation perforation and the screw hole are distributed at intervals in the circumferential direction of the transmission seat, and the spring column penetrates through the compensation perforation.

By adopting the technical scheme, the two ends of the spring column respectively abut against the movable rings after penetrating through the compensation through holes, and the compensation through holes can form guiding and limiting effects on the spring column, so that the spring column keeps the axial direction thereof parallel to the axial direction of the transmission seat in the deformation process, the elastic direction of the spring column is opposite to the movable rings at the two ends of the spring column, and the full utilization of elastic potential energy is facilitated; meanwhile, the compensation perforation can limit the distribution position of the spring columns, and the spring columns are prevented from being dislocated.

The utility model discloses further set up to: the accommodating cylinder is provided with protruding rails protruding out of the inner ring, the protruding rails are parallel to the axial direction of the accommodating cylinder in the length direction and are symmetrically arranged at two ends of the accommodating cylinder, grooves matched with the protruding rails are formed in the outer ring of the movable ring, and the protruding rails are clamped in the grooves.

Through adopting above-mentioned technical scheme, when the transmission seat rotated along with the rotation axis, because the protruding rail card on the holding section of thick bamboo falls in the recess on the rotating ring, consequently the transmission seat can drive the rotating ring and rotate, when quiet ring produced axial displacement and promoted the rotating ring and remove, axial relative slip took place for recess and protruding rail. The arrangement ensures the certainty of the relative sliding direction between the transmission seat and the movable ring.

The utility model discloses further set up to: one side of the movable ring, which is close to the spacer ring, is provided with a clamping ring, one side of the clamping ring is tightly attached to the end surface of the movable ring, the other side of the clamping ring is provided with a plurality of abutting columns, and two ends of the spring columns are respectively sleeved on the abutting columns.

By adopting the technical scheme, the movable ring and the static ring need to continuously rub against the static ring, so that the wear resistance is required to be higher, and the clamping ring does not need to use a material with strong wear resistance, so that the clamping ring and the movable ring are separately arranged, and the manufacturing cost of the device is reduced; the butt column further limits the deformation direction and the radial position of the spring column from the two ends of the spring column, and the spring column is prevented from moving.

The utility model discloses further set up to: the clamping groove is formed in the outer ring of the clamping ring, the clamping table is arranged on the end face, in contact with the clamping ring, of the movable ring, and the clamping groove is clamped in the edge of the clamping table.

Through adopting above-mentioned technical scheme, draw-in groove and ka tai complex mode can rotate together with the rotating ring when making the snap ring install on the rotating ring to this pivoted power comes from the extrusion force between the edge of ka tai and draw-in groove and not the power of dragging of spacer ring to the spring post, thereby has protected the spring post.

The utility model discloses further set up to: the one end that quiet ring was kept away from the rotating ring is equipped with the U-shaped breach, the U-shaped breach is on a parallel with the axial setting of quiet ring, quiet ring is equipped with the sealing washer with casing butt position department.

Through adopting above-mentioned technical scheme, the U-shaped breach is in being used for the joint bolt in the actual assembling process, after the bolt penetrates and wears to locate the U-shaped breach from the casing, the bolt can restrict quiet ring at ascending displacement in circumference, avoid quiet ring to produce under the frictional action of rotating ring rotatoryly, when quiet ring produces the axial under the effect of casing internal pressure and slides, the effect of direction can be played with the bolt cooperation to the U-shaped breach, and the sealing washer can adapt to the space between quiet ring and the casing through the deformation of self, thereby it is sealed to form between quiet ring and casing when quiet ring produces the axial and slides.

The utility model discloses further set up to: the accommodating cylinder is provided with heat dissipation holes penetrating through the cylinder wall.

Through adopting above-mentioned technical scheme, the heat that constantly rubs between rotating ring and the quiet ring and produce can disperse through the louvre to avoid the inside overheated emergence inflation of sealing member, damage sealing member internals, influence sealed effect.

To sum up, the utility model discloses a beneficial technological effect does:

1. the elastic pieces are arranged between the movable rings, so that the contact points between the elastic pieces and the movable rings are more on the whole, no matter which direction the movable rings are pressed, the elastic pieces on the side can compensate the displacement of the movable rings through the deformation of the elastic pieces, the compensation amount is uniform, and the sealing effect is good;

2. through set up the compensation perforation on the holding ring, set up the snap ring in the relative one side of rotating ring, set up the butt post on the snap ring, the spring post passes and its both ends cover is located on the butt post from the compensation perforation to guaranteed the accuracy of spring post deformation direction in the axial, improved elastic potential energy's utilization ratio.

Drawings

Fig. 1 is an overall sectional view of the present invention.

Fig. 2 is an exploded schematic view of the present invention.

In the figure, 1, a transmission seat; 11. an accommodating cylinder; 12. a spacer ring; 13. compensating for perforation; 14. a raised rail; 2. a stationary ring; 21. a U-shaped notch; 3. a moving ring; 31. a groove; 32. clamping a platform; 4. a spring post; 5. a snap ring; 51. a card slot; 6. a butting post; 7. a screw hole; 8. heat dissipation holes; 9. and (5) sealing rings.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 and 2, a double-end mechanical sealing element disclosed by the present invention comprises a transmission seat 1 sleeved on a rotating shaft, a movable ring 3 sliding along the axial direction of the rotating shaft and disposed at two ends of the transmission seat 1, three spring posts 4 disposed between the movable rings 3 at the top, and a stationary ring 2 abutting against the movable ring 3, wherein the spring posts 4 are uniformly distributed in the axial direction of the movable ring 3, one ends of the stationary ring 2 away from the movable ring 3 are respectively abutted against different housings, the transmission seat 1 comprises an accommodating cylinder 11 parallel to the axial direction thereof and a spacer ring 12 connected to the center of the accommodating cylinder 11, the transmission seat 1 is integrally formed in a shape of a single-side cross section in the axial direction as a whole, the outer ring of the spacer ring 12 is integrally connected with the accommodating cylinder 11, the inner ring is supported on the rotating shaft, a screw hole 7 perpendicular to the axial direction thereof is disposed at the middle part of the transmission seat 1, the screw hole 7 penetrates through the transmission seat 1, when, the end part of the screw penetrates through the transmission seat 1 and is screwed into the rotating shaft, so that the transmission seat 1 is assembled, and the transmission seat 1 rotates along with the rotating shaft; the accommodating cylinder 11 is provided with protruding rails 14 protruding from an inner ring thereof, the protruding rails 14 are parallel to the axial direction of the accommodating cylinder 11 in the length direction and are symmetrically arranged at two ends of the accommodating cylinder 11, the outer ring of the movable ring 3 is provided with grooves 31 matched with the protruding rails 14, and the protruding rails 14 are clamped in the grooves 31, so that the effect that the movable ring 3 rotates along with the accommodating cylinder 11 is achieved.

When the rotating shaft rotates, the driving seat 1 fixed on the rotating shaft and the static ring 2 are driven to rotate together. When the pressure inside two casings promoted its quiet ring 2 that corresponds the side to the opposite side when removing, the quiet ring 2 extrusion rotating ring 3 of this side, and rotating ring 3 extrusion spring post 4, spring post 4 take place to deform and compensate the displacement of quiet ring 2 to make quiet ring 2 resume the normal position rapidly under the effect of elastic force, thereby realize the sealed between casing and the rotation axis. The arrangement of a plurality of spring columns 4 ensures that the compensation amount of the sealing element is uniform, and the sealing effect is better.

Referring to fig. 1 and 2, in order to make the elastic potential energy of the spring column 4 fully utilized and make the spring column 4 not easily generate translocation, a compensation perforation 13 parallel to the axial direction of the transmission seat 1 is arranged on the spacer ring 12, the compensation perforation 13 and the screw holes 7 are distributed at intervals in the circumferential direction of the transmission seat 1, the spring column 4 is arranged by penetrating the compensation perforation 13, in addition, one side of the movable ring 3 close to the spacer ring 12 is provided with a clamping ring 5, one side of the clamping ring 5 is tightly attached to the end surface of the movable ring 3, the other side of the clamping ring is provided with a plurality of abutting columns 6, and the two ends of the spring column 4 are respectively sleeved on the. Be provided with draw-in groove 51 on the outer lane of snap ring 5, be provided with card platform 32 on the terminal surface that rotating ring 3 and snap ring 5 contacted, draw-in groove 51 card is located card platform 32 edge, and draw-in groove 51 makes snap ring 5 can rotate together with rotating ring 3 through the extrusion between the edge of card platform 32 and draw-in groove 51 with card platform 32 complex mode.

The spring post 4 passes back its both ends respectively the cover from compensating perforation 13 and locates on butt post 6, and compensating perforation 13 and butt post 6 all can form direction and limiting displacement to spring post 4 for spring post 4 keeps self axial and the axial direction parallel of transmission seat 1 at deformation in-process, thereby makes spring post 4's elastic potential energy by make full use of, and has avoided spring post 4 to take place the translocation.

Referring to fig. 1 and 2, a U-shaped notch 21 is formed in one end, away from the moving ring 3, of the stationary ring 2, the U-shaped notch 21 is parallel to the axial direction of the stationary ring 2, and a sealing ring 9 is arranged at a position where the stationary ring 2 abuts against the housing. Meanwhile, in order to form a good seal between the rotating ring 3 and the rotating shaft, a sealing ring 9 is also arranged at the inner ring of the rotating ring 3.

U-shaped breach 21 is in being used for the joint bolt in actual assembling process, after the bolt penetrates and wears to locate U-shaped breach 21 from the casing, the bolt can restrict quiet ring 2 at ascending displacement in circumference, avoid quiet ring 2 to produce rotatoryly under the frictional action of rotating ring 3, when quiet ring 2 produces the axial under the effect of casing internal pressure and slides, U-shaped breach 21 can play the effect of direction with the bolt cooperation, and sealing washer 9 can adapt to the space between quiet ring 2 and the casing through the deformation of self, thereby it is sealed to form between quiet ring 2 and the casing when quiet ring 2 produces the axial and slides.

Referring to fig. 1 and 2, the continuous friction between the moving ring 3 and the stationary ring 2 generates a large amount of heat, in order to rapidly dissipate the heat generated by the friction, a plurality of heat dissipation holes 8 penetrating through the wall of the accommodating cylinder 11 are formed in the accommodating cylinder 11, and the heat dissipation holes 8 can prevent the interior of the sealing element from being overheated and expanding, so that the sealing element is protected.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. A double mechanical seal characterized by: locate transmission seat (1) on the rotation axis including the cover, along the axial of rotation axis slide set up in rotating ring (3), the top at transmission seat (1) both ends are located a plurality of elastic components between rotating ring (3), with rotating ring (3) counterbalance tight quiet ring (2), keep away from quiet ring (2) the one end of rotating ring (3) supports respectively to locate on the casing of difference, transmission seat (1) is fixed in on the rotation axis.

2. A double mechanical seal according to claim 1, wherein: the transmission seat (1) comprises an accommodating cylinder (11) parallel to the axial direction of the transmission seat and a spacer ring (12) connected to the center of the accommodating cylinder (11), the transmission seat (1) is integrally in a T-shaped shape on the axial direction of the unilateral cross section, the outer ring of the spacer ring (12) is integrally connected with the accommodating cylinder (11), the inner ring is supported on a rotating shaft, a screw hole (7) perpendicular to the axial direction of the transmission seat (1) is formed in the middle of the transmission seat (1), and the screw hole (7) penetrates through the transmission seat (1).

3. A double mechanical seal according to claim 2, wherein: the elastic piece is spring post (4), be equipped with on spacer ring (12) and be on a parallel with the axial compensation perforation (13) of transmission seat (1), compensation perforation (13) with screw (7) are in interval distribution in the circumference of transmission seat (1), spring post (4) run through compensation perforation (13) set up.

4. A double mechanical seal according to claim 2, wherein: the accommodating cylinder (11) is provided with protruding rails (14) protruding from the inner ring of the accommodating cylinder, the protruding rails (14) are parallel to the axial direction of the accommodating cylinder (11) in the length direction and are symmetrically arranged at two ends of the accommodating cylinder (11), the outer ring of the movable ring (3) is provided with grooves (31) matched with the protruding rails (14), and the protruding rails (14) are clamped in the grooves (31).

5. A double mechanical seal according to claim 3, wherein: one side that the rotating ring (3) is close to the spacer ring (12) is equipped with snap ring (5), snap ring (5) one side is hugged closely the terminal surface of rotating ring (3), the opposite side is equipped with a plurality of butt joint posts (6), the both ends of spring post (4) are located respectively the cover on butt joint post (6).

6. A double mechanical seal according to claim 5, wherein: be equipped with draw-in groove (51) on the outer lane of snap ring (5), rotating ring (3) with be equipped with card platform (32) on the terminal surface that snap ring (5) contacted, draw-in groove (51) card is located card platform (32) edge.

7. A double mechanical seal according to claim 1, wherein: the one end that quiet ring (2) kept away from rotating ring (3) is equipped with U-shaped breach (21), U-shaped breach (21) are on a parallel with the axial setting of quiet ring (2), quiet ring (2) are equipped with sealing washer (9) with casing butt position department.

8. A double mechanical seal according to claim 2, wherein: the accommodating cylinder (11) is provided with heat dissipation holes (8) penetrating through the cylinder wall.