CN210920118U

CN210920118U - Sealing assembly

Info

Publication number: CN210920118U
Application number: CN201922126932.1U
Authority: CN
Inventors: 马志刚; 韩嘉兴
Original assignee: Suzhou Bmc Sealing Technology Co ltd
Current assignee: Suzhou Bmc Sealing Technology Co ltd
Priority date: 2019-12-02
Filing date: 2019-12-02
Publication date: 2020-07-03
Anticipated expiration: 2029-12-02

Abstract

The utility model discloses a seal assembly, seal assembly includes support ring, clamp ring, and locates the support ring with annular seal spare between the clamp ring, wherein, the support ring with the clamp ring can be connected along axial relative floating, annular seal spare includes at least a set of sealing ring, all the sealing ring all sets up on a side shaft end portion of clamp ring and along the axial support press on the axial end face of support ring. The sealing assembly can be integrally installed in a device to be sealed or can be integrally removed from the sealing device, the integrity of the sealing ring is guaranteed during installation and disassembly, the sealing reliability is guaranteed, the disassembly medium cannot be polluted, and the assembly and disassembly are very convenient.

Description

Sealing assembly

Technical Field

The utility model relates to a seal assembly especially relates to a can wholly install and remove formula seal assembly.

Background

In the fields of nuclear power, petrochemical industry, food and the like, some shaft seals need to be periodically replaced due to the need of overhauling or replacing related elements. The traditional sealing ring has no self protection and ensures a complete disassembly structure, the assembly and disassembly process is not only difficult, the risk of sealing failure caused by the damage of the sealing ring exists in the assembly and disassembly process, and the sealing ring fragments fall into a medium due to the incapability of ensuring complete disassembly in the disassembly process, so that the risk of medium pollution is caused. Therefore, it is necessary to design a sealing assembly that can be integrally mounted and dismounted to solve the above problems.

Disclosure of Invention

The utility model aims at providing a but seal assembly of unit mount and dismantlement.

In order to achieve the above purpose, the utility model adopts the technical scheme that: the utility model provides a seal assembly, seal assembly includes support ring, clamp ring, and locate the support ring with annular seal between the clamp ring, wherein, the support ring with the clamp ring can be connected along axial relative floating, annular seal includes at least a set of sealing ring, all the sealing ring all sets up on one side axle head portion of clamp ring and along axial butt press on the axle head face of support ring.

Preferably, an annular bulge is arranged at the end part of one side shaft of the compression ring, and all the sealing rings are arranged on the annular bulge; the sealing assembly comprises a supporting ring and a pressing ring, wherein the supporting ring is provided with an annular bulge, the annular bulge is arranged on the end part of a shaft at one side of the supporting ring, the annular bulge is matched with the annular groove, the annular bulge can be axially and relatively slidably inserted into the annular groove, and the sealing assembly further comprises a connecting piece which is used for connecting the pressing ring and the supporting ring so as to axially limit the pressing ring and the supporting ring.

Further, the annular sealing element comprises an inner sealing ring and an outer sealing ring, the inner sealing ring and the outer sealing ring are at least provided with one group respectively, and the inner sealing ring and the outer sealing ring are both arranged on the annular bulge.

Further, an outer peripheral portion of the inner seal ring and an inner peripheral portion of the annular protrusion are fitted to each other, and an inner peripheral portion of the outer seal ring and an outer peripheral portion of the annular protrusion are fitted to each other.

As a specific implementation manner, the inner seal ring and the outer seal ring each have multiple sets which are sequentially arranged along the axial direction.

Preferably, a plurality of waist-shaped grooves are arranged on the annular protrusion at intervals along the circumferential direction, a plurality of pin holes are correspondingly arranged on the support ring, the connecting piece is a connecting pin which is arranged in the pin holes in a penetrating mode in a matching mode, and the connecting pin is arranged in the waist-shaped grooves in a penetrating mode along the axial direction.

Further, the length of the waist-shaped groove is not less than the sum of the diameter of the connecting pin and the maximum compression amount of all the sealing rings in the axial direction.

Furthermore, gaps are formed between the groove walls on the two sides of the waist-shaped groove in the axial direction of the annular protrusion and the connecting pin.

As a specific embodiment, at least two groups of pin holes are provided, all the pin holes are uniformly distributed on the support ring at intervals along the circumferential direction, and correspondingly, a plurality of groups of the waist-shaped grooves and the connecting pins are also provided.

Because of above-mentioned technical scheme's application, compared with the prior art, the utility model have the following advantage: the utility model discloses a seal assembly, wherein through installing annular seal spare on the axle head portion of clamp ring to thereby form a whole seal assembly with connecting relative floating between clamp ring and the support ring, it can wholly install to treating among the sealing device or can wholly demolish from sealing device, this integrality of annular seal spare when having guaranteed the installation and having dismantled, thereby ensure sealed reliability, and dismantle the medium can not be contaminated, install and remove all convenience very.

Drawings

Fig. 1 is a cross-sectional view of a seal assembly according to embodiment 1 of the present invention;

fig. 2 is a cross-sectional view of a sealing device to which a seal assembly according to embodiment 1 of the present invention is applied;

FIG. 3 is an enlarged view of portion A of FIG. 2;

fig. 4 is a cross-sectional view of a sealing device according to embodiment 2 of the present invention;

wherein: 100. a stuffing box; 200. 200' and a sealing gland; 300. a shaft lever; 400. a seal assembly;

1. a compression ring; 11. an annular projection; 12. a connecting end portion; 13. compressing the end part; 14. pressing the end face; 15. a waist-shaped groove; 2. a support ring; 21. an annular groove; 22. a pin hole; 3. an inner seal ring; 4. an outer seal ring; 5. and (7) connecting pins.

Detailed Description

The technical solution of the present invention will be further explained with reference to the accompanying drawings and specific embodiments.

Example 1

Referring to the sealing assembly shown in fig. 1, the sealing assembly includes a support ring 2, a clamp ring 1, and an annular sealing member disposed between the support ring 2 and the clamp ring 1, wherein the support ring 2 and the clamp ring 1 can be connected in a relatively floating manner along an axial direction, the annular sealing member includes at least one set of sealing rings, all the sealing rings are disposed on a shaft end portion on one side of the clamp ring 1 and are pressed against a shaft end surface of the support ring 2 along the axial direction, and the sealing connection between the sealing rings and a portion to be sealed is realized. Thus, the support ring 2, the pressing ring 1 and all the sealing rings form an integral sealing assembly, the support ring 2 and the pressing ring 1 are respectively matched with the parts to be hermetically connected in the axial direction, the whole sealing assembly can be installed between the parts to be hermetically connected, when the sealing assembly is installed and disassembled, the whole sealing assembly is installed and disassembled, the integrity of the whole sealing ring can be ensured when the sealing assembly is installed, and the integral sealing assembly is completely disassembled without damaging the sealing ring when the sealing assembly is disassembled.

Specifically, as shown in fig. 1, the compression ring 1 has an annular protrusion 11 on one side shaft end, and all the seal rings are mounted on the annular protrusion 11; an annular groove 21 matched with the annular protrusion 11 is arranged on one side shaft end part of the support ring 2, and the annular protrusion 11 can be relatively slidably inserted in the annular groove 21 along the axial direction, so that the floating connection between the support ring 2 and the compression ring 1 is realized.

The sealing assembly also comprises a connecting piece 5 which is used for connecting the pressing ring 2 and the supporting ring 1 so as to axially limit the pressing ring and the supporting ring. In this embodiment, a plurality of waist-shaped grooves 15 are circumferentially arranged on the annular protrusion 11 at intervals, a plurality of pin holes 22 are correspondingly arranged on the support ring 2, the connecting member 5 is a connecting pin 5 which is fittingly inserted into the pin holes 22, and the connecting pin 5 is axially inserted into the waist-shaped groove 15.

In the specific arrangement, the length of the waist-shaped groove 15 is not less than the sum of the diameter of the connecting pin 5 and the maximum axial compression of all the sealing rings, so that the sealing device is favorable for compressing the inner sealing ring 3/the outer sealing ring 4 along the axial direction to realize sealing after being installed. At least two groups of pin holes 22 are arranged, all the pin holes 22 are uniformly distributed on the support ring 2 along the circumferential direction at intervals, and correspondingly, the kidney-shaped groove 15 and the connecting pin 5 are also respectively provided with a plurality of groups. Preferably, after the sealing assembly is installed, gaps are arranged between the groove walls on the two sides of the waist-shaped groove 15 in the axial direction of the annular protrusion 11 and the connecting pin 5, so that the installation is facilitated, and the sealing ring is compressed in the axial direction when the sealing assembly is installed between the parts to be sealed, and the sealing of the part to be sealed is realized.

Referring to fig. 1, in the present embodiment, the annular seal includes an inner seal ring 3 and an outer seal ring 4, the inner seal ring 3 and the outer seal ring 4 are respectively provided with at least one group, and the inner seal ring 3 and the outer seal ring 4 are both installed on the annular protrusion 11, where the inner seal ring 3 and the outer seal ring 4 have multiple groups arranged sequentially along the axial direction, where an outer peripheral portion of the inner seal ring 3 is matched with an inner peripheral portion of the annular protrusion 11, an inner peripheral portion of the outer seal ring 4 is matched with an outer peripheral portion of the annular protrusion 11, and the inner peripheral portion of the inner seal ring 3 and the outer peripheral portion of the outer seal ring 4 are used to achieve a sealing connection with a component to be sealed.

Referring to fig. 2 and 3, a specific sealing device of a sealing assembly applying the embodiment is shown, the sealing device includes a stuffing box 100 having a stuffing cavity, a gland 200 fixed on the stuffing box 100, and a shaft 300 axially inserted in the stuffing box 100, the sealing assembly 400 is used for sealing connection between the shaft 300 and the stuffing box 100, the gland 200 and the stuffing box 100 are fixedly connected through a plurality of bolts, and the sealing assembly 400 is axially compressed between the gland 200 and the stuffing box 100. The support ring 2 is fittingly accommodated in the packing cavity, the shaft end part of the compression ring 1, which is not provided with the annular protrusion 11, is axially fitted with the seal gland 200, the inner peripheral part of the inner seal ring 3 is mutually and hermetically fitted with the outer peripheral part of the shaft rod 300, and the outer peripheral part of the outer seal ring 4 is mutually and hermetically fitted with the circumferential side wall of the packing cavity.

When the device is arranged specifically, the support ring 2 is completely accommodated in the packing cavity; the whole pressing ring 1 is of a T shape, the pressing ring 1 further comprises a pressing end part 13 matched with the sealing end cover 200, and a connecting end part 12 arranged between the pressing end part 13 and the annular bulge 11, a pressing end face 14 on the pressing end part 13 adopts a conical surface and is used for being axially matched with the conical end face of the pressing end cover 200, at least part of the connecting end part 12 can penetrate through a packing cavity along the axial direction in a matched mode, and therefore axial extrusion of the inner sealing ring 3 and the outer sealing ring 4 is achieved, and sufficient sealing stress is formed at the sealing position.

The inner sealing ring 3 and the outer sealing ring 4 are both arranged on the annular bulge 11 and are provided with a plurality of groups arranged along the axial direction, and the total thickness of all the inner sealing ring 3/the outer sealing ring 4 is smaller than the depth of the packing cavity during arrangement, so that the packing cavity can be completely accommodated after being extruded to realize sealing.

Therefore, during installation, all the components on the sealing assembly 400 are assembled firstly, then the end part of the sealing assembly 400, which is provided with the support ring 2, is inserted into the stuffing cavity along the axial direction and sleeved on the shaft rod 300, and then the pressing end cover 200 is sleeved in and pressed on the pressing end cover 200 along the axial direction to enable the pressing end cover to be fastened and connected with the stuffing box 100 relatively, so that the inner sealing ring 3 and the outer sealing ring 4 are axially extruded in the stuffing cavity to realize sealing between the shaft rod 300 and the stuffing box 100, the installation is very convenient, and the damage of the sealing rings can not be caused.

When the sealing assembly needs to be disassembled, the connection between the pressing end cover 200 and the stuffing box 100 is loosened, then the sealing assembly 400 is integrally disassembled, the pressing ring 1 and the supporting ring 2 can be relatively separated by disassembling each connecting pin 5, and then each sealing ring can be taken out, so that the integrity of each sealing ring can be ensured, and the medium is prevented from being polluted.

To sum up, the utility model discloses a seal assembly, it can be installed to treating among the sealing device or can be wholly demolishd from sealing device, and this integrality of sealing ring when having guaranteed the installation and having dismantled to ensure sealed reliability, and dismantle the medium and can not be polluted, install and remove all convenience very.

Example 2

Referring to the sealing device shown in fig. 4, the main difference from embodiment 1 is the specific form of the gland 200. In this embodiment, the gland 200 'is a compression nut sleeved on the shaft end of the stuffing box 100, and the compression nut is provided with an internal thread, and is fixedly connected with the stuffing box 100 through thread fit, so that the seal assembly 400 is compressed between the gland 200' and the stuffing box 100 along the axial direction.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. A seal assembly, characterized by: the sealing assembly comprises a support ring, a compression ring and an annular sealing piece arranged between the support ring and the compression ring, wherein the support ring and the compression ring can be connected in a relatively floating mode along the axial direction, the annular sealing piece comprises at least one group of sealing rings, and all the sealing rings are arranged on the shaft end part on one side of the compression ring and are pressed on the shaft end surface of the support ring in a propping mode along the axial direction.

2. The seal assembly of claim 1, wherein: the end part of the shaft at one side of the compression ring is provided with an annular bulge, and all the sealing rings are arranged on the annular bulge; the sealing assembly comprises a supporting ring and a pressing ring, wherein the supporting ring is provided with an annular bulge, the annular bulge is arranged on the end part of a shaft at one side of the supporting ring, the annular bulge is matched with the annular groove, the annular bulge can be axially and relatively slidably inserted into the annular groove, and the sealing assembly further comprises a connecting piece which is used for connecting the pressing ring and the supporting ring so as to axially limit the pressing ring and the supporting ring.

3. The seal assembly of claim 2, wherein: the annular sealing element comprises an inner sealing ring and an outer sealing ring, the inner sealing ring and the outer sealing ring are at least provided with one group respectively, and the inner sealing ring and the outer sealing ring are both arranged on the annular bulge.

4. The seal assembly of claim 3, wherein: the outer circumference of the inner sealing ring is matched with the inner circumference of the annular bulge, and the inner circumference of the outer sealing ring is matched with the outer circumference of the annular bulge.

5. The seal assembly of claim 4, wherein: the inner sealing ring and the outer sealing ring are provided with a plurality of groups which are sequentially arranged along the axial direction.

6. The seal assembly of claim 2, wherein: a plurality of waist-shaped grooves are formed in the annular protrusion at intervals along the circumferential direction, a plurality of pin holes are correspondingly formed in the support ring, the connecting piece is arranged in the pin holes in a penetrating mode in a matched mode, and the connecting pin is arranged in the waist-shaped grooves in a penetrating mode in the axial direction.

7. The seal assembly of claim 6, wherein: the length of the waist-shaped groove is not less than the sum of the diameter of the connecting pin and the maximum axial compression of all the sealing rings.

8. The seal assembly of claim 7, wherein: gaps are arranged between the groove walls on the two sides of the waist-shaped groove in the axial direction of the annular bulge and the connecting pin.

9. The seal assembly of claim 6, wherein: the pinhole is equipped with two sets ofly at least, and all the pinhole is in evenly distribute along circumference interval on the support ring, correspondingly, waist type groove the connecting pin also is equipped with the multiunit.