CN215334439U

CN215334439U - Mechanical sealing device

Info

Publication number: CN215334439U
Application number: CN202121031451.3U
Authority: CN
Inventors: 王伟; 闻兰; 闻永华
Original assignee: JIANGSU HUAQING FLUID TECHNOLOGY CO LTD
Current assignee: JIANGSU HUAQING FLUID TECHNOLOGY CO LTD
Priority date: 2021-05-14
Filing date: 2021-05-14
Publication date: 2021-12-28
Anticipated expiration: 2031-05-14

Abstract

The utility model relates to a mechanical seal device, comprising: the shaft, the axle sleeve, the drive ring, the cavity, first quiet ring, first rotating ring seat, spring mechanism, the quiet ring of second, second rotating ring seat, first gland and second gland, first quiet ring, first rotating ring and first rotating ring seat set up in one side of spring mechanism, the quiet ring of second, second rotating ring and second rotating ring seat set up in the opposite side of spring mechanism, spring mechanism includes: the spring comprises a push ring, a spring seat and a spring arranged between the push ring and the spring seat, wherein a first limiting part and a second limiting part are arranged in the spring seat, a first limiting groove matched with the first limiting part is formed in the shaft sleeve, a second limiting groove matched with the second limiting part is formed in the push ring, the first movable ring seat is connected with the push ring through a third pin, and the second movable ring seat is connected with the spring seat through a fourth pin, so that the structure is simplified, and the spring force at two ends is kept consistent.

Description

Mechanical sealing device

[ technical field ] A method for producing a semiconductor device

The utility model relates to the field of mechanical sealing, in particular to a mechanical sealing device for a pump.

[ background of the utility model ]

The mechanical seal is a shaft seal device of a rotating machine. Such as centrifugal pumps, centrifuges, reaction kettles, compressors, and the like. Since the drive shaft extends through the inside and outside of the apparatus, there is a circumferential gap between the shaft and the apparatus through which the medium in the apparatus leaks out, and if the pressure in the apparatus is lower than atmospheric pressure, air leaks into the apparatus, so that a shaft seal device must be provided to prevent leakage.

Quiet ring and rotating ring are the core part among the mechanical seal device, form sealed face between quiet ring and the rotating ring, set up one set of quiet ring among some mechanical seal devices, the rotating ring, set up two sets of quiet rings among some mechanical seal devices, the rotating ring, need the spring to provide the compensatory force when sealed face wearing and tearing, in prior art, one set of quiet ring generally, the rotating ring sets up one set of spring mechanism, two sets of quiet rings, the rotating ring sets up two sets of spring mechanism promptly, every set of spring mechanism include with axle sleeve fixed connection's spring holder and set up the spring in the spring holder, the defect of this kind of structure lies in: 1. the whole sealing structure becomes complicated after two sets of spring mechanisms are used, and the manufacturing cost is increased; 2. because two sets of spring mechanisms are respectively and fixedly installed, the spring force of the two sets of spring mechanisms cannot be kept consistent, and 3, because the spring seat is fixedly connected with the shaft sleeve, the whole mechanical sealing device has higher requirements on the manufacturing precision of other parts during installation.

Therefore, there is a need to provide a mechanical seal device that solves the above technical problems.

[ Utility model ] content

In order to solve the above problems, an object of the present invention is to provide a mechanical sealing device in which two sets of stationary rings and moving rings share one set of spring mechanism.

In order to achieve the purpose, the utility model adopts the technical scheme that: a mechanical seal, comprising: the shaft sleeve is sleeved on the shaft, the driving ring is sleeved on the shaft sleeve and connected with the shaft sleeve through a first fixing piece, the cavity is connected with the first static ring through a first pin, the first static ring, the first movable ring and the first movable ring seat are arranged on one side of the spring mechanism, a first sealing surface is formed between the first static ring and the first movable ring, the second static ring is connected with the first gland through a second pin, the second static ring, the second movable ring and the second movable ring seat are arranged on the other side of the spring mechanism, a second sealing surface is formed between the second static ring and the second movable ring, and the spring mechanism comprises: the novel dustproof device comprises a push ring, a spring seat and a spring arranged between the push ring and the spring seat, wherein a first limiting part and a second limiting part are arranged in the spring seat, a first limiting groove matched with the first limiting part is formed in the shaft sleeve, a second limiting groove matched with the second limiting part is formed in the push ring, the first movable ring seat is connected with the push ring through a third pin, the second movable ring seat is connected with the spring seat through a fourth pin, the first gland is connected with a cavity through a second fixing part, the second gland is connected with the first gland through a third fixing part, a plurality of dustproof rings arranged in parallel are arranged between the second gland and the shaft sleeve, and a gasket is arranged between every two dustproof rings.

Preferably, a mechanical sealing device in the present invention is further configured to: the first limiting part and the second limiting part are both bolts, and the first limiting groove and the second limiting groove are both in oval arrangement.

Preferably, a mechanical sealing device in the present invention is further configured to: the improved bearing is characterized in that a shaft sleeve sealing ring is arranged between the shaft sleeve and the shaft, a first static ring sealing ring is arranged between the first static ring and the cavity, a first movable ring seat sealing ring is arranged between the first movable ring seat and the push ring, a second movable ring seat sealing ring is arranged between the second movable ring seat and the spring seat, a second static ring sealing ring is arranged between the second static ring and the first gland, a first gland sealing ring is arranged between the first gland and the cavity, and a second gland sealing ring is arranged between the second gland and the first gland.

Preferably, a mechanical sealing device in the present invention is further configured to: the shaft sleeve sealing ring, the first static ring sealing ring, the first movable ring seat sealing ring, the second static ring sealing ring, the first gland sealing ring and the second gland sealing ring are all O-shaped rings.

Preferably, a mechanical sealing device in the present invention is further configured to: the number of the dust rings is three, and the number of the gaskets is two.

Compared with the prior art, the utility model has the following beneficial effects: in the utility model, one set of the static ring and the movable ring is arranged on one side of the spring mechanism, the other set of the static ring and the movable ring is arranged on the other side of the spring mechanism, and the two sets of the static ring and the movable ring share one spring mechanism, so that the structure is simplified, the manufacturing cost is reduced, and the spring forces at two ends are kept consistent.

[ description of the drawings ]

Fig. 1 is a schematic sectional view of a mechanical seal device according to the present invention.

In fig. 1: 1. a shaft, 2, a shaft sleeve, 20, a shaft sleeve seal ring, 21, a first limit groove, 3, a drive ring, 30, a first fixing member, 4, a cavity, 40, a first pin, 5, a first stationary ring, 50, a first stationary ring seal ring, 51, a first sealing surface, 6, a first movable ring, 7, a first movable ring seat, 70, a first movable ring seat seal ring, 71, a third pin, 8, a spring mechanism, 80, a push ring, 800, a second limit groove, 81, a spring seat, 810, a first limit member, 811, a second limit member, 82, a spring, 9, a second stationary ring, 90, a second stationary ring seal ring, 91, a second pin, 92, a second sealing surface, 10, a second movable ring, 11, a second movable ring seat, 110, a second movable ring seat seal ring, 111, a fourth pin, 12, a first gland, 120, a second fixing member, 121, a first gland, 13, a second gland, 130, a third fixing member, 131. a second gland sealing ring, 14, a dust ring, 15 and a gasket.

[ detailed description ] embodiments

A mechanical seal according to the present invention will be described in further detail below with reference to specific embodiments.

Referring to fig. 1, a mechanical seal device includes: the shaft comprises a shaft 1, a shaft sleeve 2, a driving ring 3, a cavity 4, a first static ring 5, a first movable ring 6, a first movable ring seat 7, a spring mechanism 8, a second static ring 9, a second movable ring 10, a second movable ring seat 11, a first gland 12 and a second gland 13.

The shaft sleeve 2 is sleeved on the shaft 1, a shaft sleeve sealing ring 20 is arranged between the shaft sleeve 2 and the shaft 1, the driving ring 3 is sleeved on the shaft sleeve 2 and connected with the shaft sleeve 2 through a first fixing member 30, and in the present embodiment, the first fixing member 30 is a hexagon socket set screw. The cavity 4 is connected with the first stationary ring 5 through a first pin 40, a first stationary ring sealing ring 50 is arranged between the first stationary ring 5 and the cavity 4, the first stationary ring 5, the first movable ring 6 and the first movable ring seat 7 are arranged on one side of the spring mechanism 8, a first sealing surface 51 is formed between the first stationary ring 5 and the first movable ring 6, a second stationary ring sealing ring 90 is arranged between the second stationary ring 9 and the first gland 12, the second stationary ring 9 is connected with the first gland 12 through a second pin 91, the second stationary ring 9, the second movable ring 10 and the second movable ring seat 11 are arranged on the other side of the spring mechanism 8, and a second sealing surface 92 is formed between the second stationary ring 9 and the second movable ring 10.

The spring mechanism 8 includes: the thrust ring 80, the spring seat 81 and the spring 82 arranged between the thrust ring 80 and the spring seat 81, a first limiting member 810 and a second limiting member 811 are arranged in the spring seat 81, the shaft sleeve 2 is provided with a first limiting groove 21 matched with the first limiting member 810, the thrust ring 80 is provided with a second limiting groove 800 matched with the second limiting member 811, in the embodiment, the first limiting member 810 and the second limiting member 811 are both bolts, and the first limiting groove 21 and the second limiting groove 800 are both in an oval arrangement. A first moving ring seat sealing ring 70 is arranged between the first moving ring seat 7 and the push ring 80, the first moving ring seat 7 is connected with the push ring 80 through a third pin 71, a second moving ring seat sealing ring 110 is arranged between the second moving ring seat 11 and the spring seat 81, the second moving ring seat 11 is connected with the spring seat 81 through a fourth pin 111, the first gland 12 is connected with the cavity 4 through a second fixing member 120, and in this embodiment, the second fixing member 120 is an inner hexagonal socket head screw. Be equipped with first gland sealing washer 121 between first gland 12 and the cavity 4, be connected through third mounting 130 between second gland 13 and the first gland 12, be equipped with second gland sealing washer 131 between second gland 13 and the first gland 12, be equipped with a plurality of dust ring 14 that are parallel arrangement between second gland 13 and the axle sleeve 2, be equipped with gasket 15 between per two dust ring 14. In the present embodiment, the sleeve seal ring 20, the first stationary seal ring 50, the first moving seat seal ring 70, the second moving seat seal ring 110, the second stationary seal ring 90, the first gland seal ring 121, and the second gland seal ring 131 are all O-rings, the number of the dust seal rings 14 is three, and the number of the gaskets 15 is two.

The working principle of the mechanical sealing device is as follows: the driving ring 3 drives the shaft sleeve 2 and the shaft 1 to rotate, then drives the first movable ring seat 7, the first movable ring 6, the second movable ring seat 11 and the second movable ring 10 to rotate, the cavity 4, the first stationary ring 5, the second stationary ring 9, the first gland 12 and the second gland 13 are stationary members, a first sealing surface 51 is formed between the first movable ring 6 and the first stationary ring 5, a second sealing surface 92 is formed between the second movable ring 10 and the second stationary ring 9, the spring 82 simultaneously provides compensation force for the first sealing surface 51 and the second sealing surface 92 during operation, and the dust-proof ring 14 on one side is used for preventing impurities such as dust from entering the mechanical sealing device.

In summary, the two sets of stationary rings and the movable ring share one spring mechanism, so that the structure is simplified, the manufacturing cost is reduced, the spring forces at two ends are kept consistent, and the spring seat can axially displace relative to the shaft sleeve, so that the whole mechanical sealing device can be conveniently installed.

The above-mentioned embodiments are merely illustrative of the principles and effects of the present invention, and some embodiments may be used, not restrictive; it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept of the present invention, and these changes and modifications belong to the protection scope of the present invention.

Claims

1. A mechanical seal, characterized by: the method comprises the following steps: the shaft sleeve is sleeved on the shaft, the driving ring is sleeved on the shaft sleeve and connected with the shaft sleeve through a first fixing piece, the cavity is connected with the first static ring through a first pin, the first static ring, the first movable ring and the first movable ring seat are arranged on one side of the spring mechanism, a first sealing surface is formed between the first static ring and the first movable ring, the second static ring is connected with the first gland through a second pin, the second static ring, the second movable ring and the second movable ring seat are arranged on the other side of the spring mechanism, a second sealing surface is formed between the second static ring and the second movable ring, and the spring mechanism comprises: the novel dustproof device comprises a push ring, a spring seat and a spring arranged between the push ring and the spring seat, wherein a first limiting part and a second limiting part are arranged in the spring seat, a first limiting groove matched with the first limiting part is formed in the shaft sleeve, a second limiting groove matched with the second limiting part is formed in the push ring, the first movable ring seat is connected with the push ring through a third pin, the second movable ring seat is connected with the spring seat through a fourth pin, the first gland is connected with a cavity through a second fixing part, the second gland is connected with the first gland through a third fixing part, a plurality of dustproof rings arranged in parallel are arranged between the second gland and the shaft sleeve, and a gasket is arranged between every two dustproof rings.

2. A mechanical seal according to claim 1, wherein: the first limiting part and the second limiting part are both bolts, and the first limiting groove and the second limiting groove are both in oval arrangement.

3. A mechanical seal according to claim 1, wherein: the improved bearing is characterized in that a shaft sleeve sealing ring is arranged between the shaft sleeve and the shaft, a first static ring sealing ring is arranged between the first static ring and the cavity, a first movable ring seat sealing ring is arranged between the first movable ring seat and the push ring, a second movable ring seat sealing ring is arranged between the second movable ring seat and the spring seat, a second static ring sealing ring is arranged between the second static ring and the first gland, a first gland sealing ring is arranged between the first gland and the cavity, and a second gland sealing ring is arranged between the second gland and the first gland.

4. A mechanical seal according to claim 3, wherein: the shaft sleeve sealing ring, the first static ring sealing ring, the first movable ring seat sealing ring, the second static ring sealing ring, the first gland sealing ring and the second gland sealing ring are all O-shaped rings.

5. A mechanical seal according to claim 1, wherein: the number of the dust rings is three, and the number of the gaskets is two.