CN213899873U

CN213899873U - Mechanical sealing structure

Info

Publication number: CN213899873U
Application number: CN202023016430.2U
Authority: CN
Inventors: 范双午
Original assignee: Fulitong Pump Wuxi Co ltd
Current assignee: Fulitong Pump Wuxi Co ltd
Priority date: 2020-12-14
Filing date: 2020-12-14
Publication date: 2021-08-06
Anticipated expiration: 2030-12-14

Abstract

This application relates to the field of machining, in particular to a mechanical seal structure. The mechanical seal structure includes a shaft sleeve which is sleeved on the outer wall of the drive shaft, and the outer wall of the shaft sleeve is sleeved with a bushing, a sheath, a rotating ring and a fixed ring from bottom to top. The outer wall of the fixed ring is sleeved with a shaft seal fixing seat, the fixed ring abuts the rotating ring, the rotating ring can only rotate around its own axis, the shaft seal is fixed at one end to be attached to the outer wall of the sheath, and the other end is attached to the outer wall of the fixing ring. The present application has the effect of being able to improve the sealing effect of the mechanical seal.

Description

Mechanical sealing structure

Technical Field

The application relates to the field of machining, in particular to a mechanical sealing structure.

Background

In equipment such as a water pump and the like, a transmission shaft penetrates inside and outside the equipment, a circumferential gap exists between the shaft and the equipment, a medium in the equipment leaks outwards through the gap, and if the pressure in the equipment is lower than the atmospheric pressure, air leaks into the equipment, so that a shaft sealing device for preventing leakage is required. Mechanical seals are the most important shaft sealing means for these devices, because they have the advantages of low leakage and long life.

At present, a mechanical sealing device in the related art is easy to generate a gap with a transmission shaft, so that the sealing effect is poor.

SUMMERY OF THE UTILITY MODEL

In order to improve mechanical seal's sealed effect, this application provides a mechanical seal structure.

The application provides a mechanical seal structure adopts following technical scheme:

the utility model provides a mechanical seal structure, includes the axle sleeve, and the axle sleeve cover is established at the transmission shaft outer wall, and the axle sleeve outer wall is from supreme cover in proper order down is equipped with bush, sheath, rotating ring and solid fixed ring, and solid fixed ring outer wall cover is equipped with the bearing seal fixing base, and solid fixed ring supports the rotating ring, and the rotating ring only can rotate around self axis, and the bearing seal is fixed in one end and pastes with the sheath outer wall, and the other end pastes with solid fixed ring outer wall.

Through adopting above-mentioned technical scheme, when the transmission shaft of equipment such as water pump at the during operation, bush, sheath, swivel ring, solid fixed ring and bearing seal fixing base that the transmission shaft outer wall cover was established play sealed effect, make inside and outside space separate, reduced the probability and the degree that the medium in the equipment outwards revealed or the air revealed to the equipment in to reach the purpose of improve equipment mechanical seal effect.

Preferably, the top end of the transmission shaft is coaxially fixed with a fixed washer, and the fixed washer is connected with the shaft sleeve through a hexagonal socket head fixing bolt.

Through adopting above-mentioned technical scheme, the setting of fixing washer has further improved equipment mechanical seal's effect, and between fixing washer and the axle sleeve make fixing washer fastened on the axle sleeve through the connection of hexagon socket head fixing bolt, make fixing washer be difficult for breaking away from the axle sleeve by oneself, in addition, unscrew hexagon socket head fixing bolt through the hexagon spanner and can unpack fixing washer from the axle sleeve conveniently.

Preferably, the inner wall of the shaft sleeve is provided with a first annular groove, the first annular groove is coaxial with the shaft sleeve, and a first O-shaped ring is fixed in the first annular groove.

Through adopting above-mentioned technical scheme, first O type ring pastes with the axis of rotation outer wall, has improved mechanical seal's effect.

Preferably, a cavity is reserved between the upper portion of the bushing and the shaft sleeve, the cavity forms a fifth annular groove, a compression spring is arranged in the fifth annular groove, one end of the compression spring is connected with the sheath, and the other end of the compression spring is connected with the bushing.

Through adopting above-mentioned technical scheme, compression spring is in compression state, consequently can produce and press the axial tension of self to prop up bush and sheath.

Preferably, a cavity is reserved between the upper part of the sheath and the shaft sleeve, a second annular groove is formed in the cavity, the rotating ring is located in the second annular groove, a second O-shaped ring is fixed in the second annular groove, the position of the rotating ring is higher than that of the second O-shaped ring, and the rotating ring is attached to the second O-shaped ring.

Through adopting above-mentioned technical scheme, the setting up of second O type ring has further improved mechanical seal's effect, and the second O type ring still can make solid fixed ring support the swivel becket in addition, makes the swivel becket only can rotate and can not radially remove along self axial.

Preferably, a cavity is reserved between the fixing ring and the shaft seal fixing seat, the cavity forms a third annular groove, and a third O-shaped ring is fixed in the third annular groove.

Through adopting above-mentioned technical scheme, the setting up of third O type ring makes and closely pastes between solid fixed ring and the bearing seal fixing base, has further improved mechanical seal's effect.

Preferably, the outer wall of the shaft seal fixing seat is provided with a fourth annular groove, and a fourth O-shaped ring is fixed in the fourth annular groove.

Through adopting above-mentioned technical scheme, the setting up of fourth O type ring makes closely close the paste between bearing seal fixing base and the equipment main part, has further improved mechanical seal's effect.

Preferably, the liner is not in direct contact with the sheath.

Through adopting above-mentioned technical scheme, the bush does not have direct contact with the sheath and has reduced because of the wearing and tearing that conflict mutually produced between bush and the sheath, has prolonged the life of bush and sheath.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the arrangement of the bushing, the sheath, the rotating ring, the fixing ring, the shaft seal fixing seat and the fixing gasket can effectively improve the sealing effect of mechanical seal;

2. the arrangement of the first O-ring, the second O-ring, the third O-ring and the fourth O-ring can further improve the sealing effect of the mechanical seal.

Drawings

Fig. 1 is a cross-sectional view of a mechanical seal according to an embodiment of the present application.

Description of reference numerals: 1. a shaft sleeve; 2. a bushing; 3. a compression spring; 4. a sheath; 5. a rotating ring; 6. a fixing ring; 7. a shaft seal fixing seat; 8. a stationary washer; 9. a first O-ring; 10. a second O-ring; 11. a third O-ring; 12. a hexagonal socket head fixing bolt; 13. a fourth O-ring; 14. a first annular groove; 15. a second annular groove; 16. a third annular groove; 17. a fourth annular groove; 18. a fifth annular groove.

Detailed Description

The present application is described in further detail below with reference to FIG. 1.

The embodiment of the application discloses mechanical seal structure. Referring to fig. 1, a mechanical seal structure includes a shaft sleeve 1, the shaft sleeve 1 is used for being sleeved on the outer wall of a transmission shaft of equipment such as a water pump, a first annular groove 14 coaxial with the shaft sleeve 1 is formed at the bottom end of the inner wall of the shaft sleeve 1, a first O-ring 9 is adhered in the first annular groove 14 through strong glue, and the inner diameter of the first O-ring 9 is the same as that of the shaft sleeve 1.

Referring to fig. 1, a bush 2 and a sheath 4 are sleeved on the outer wall of a shaft sleeve 1, the bush 2 and the sheath 4 are both used for sealing a gap between a transmission shaft and an equipment body, and the bush 2 is located below the sheath 4. There is the neutral gear between 2 upper end inner walls of bush and the 4 outer walls of sheath, for fifth annular groove 18, is provided with compression spring 3 in the fifth annular groove 18, and compression spring 3 is in the state of compressed, and compression spring 3 is coaxial with

axle sleeve

1, and 3 one end of compression spring support bush 2, and the 3 other ends of compression spring support sheath 4 to compression spring 3 can prop tight bush 2 and sheath 4.

Referring to fig. 1, a neutral position exists between the inner wall of the upper end of the sheath 4 and the outer wall of the shaft sleeve 1, namely, the second annular groove 15 is formed, a second O-ring 10 and a rotating ring 5 are sequentially arranged in the second annular groove 15 from bottom to top along the self axial direction, the second O-ring 10 and the rotating ring 5 are coaxial with the shaft sleeve 1, the second O-ring 10 is adhered to the bottom wall of the second annular groove 15 by using strong glue, the rotating ring 5 is adhered to the second O-ring 10, and the rotating ring 5 can rotate around the self axial line.

Referring to fig. 1, a fixing ring 6 is arranged above the rotating ring 5, the fixing ring 6 is coaxial with the shaft sleeve 1, and the fixing ring 6 abuts against the rotating ring 5 to prevent the rotating ring 5 from moving along the radial direction of the rotating ring 5. 6 outer wall covers of solid fixed ring are equipped with bearing seal fixing base 7, leave the neutral gear between 7 inner walls of bearing seal fixing base and the solid fixed ring 6 outer wall, for third ring channel 16, it has third O type ring 11 to paste through powerful glue in the third ring channel 16, and 7 outer walls of bearing seal fixing base are opened has fourth ring channel 17, and the same powerful glue of fourth ring channel 17 is pasted and is had fourth O type ring 13, and third O type ring 11 all is coaxial with axle sleeve 1 with fourth O type ring 13.

Referring to fig. 1, bearing seal fixing base 7 top is provided with fixed washer 8, and fixed washer 8 is coaxial with

axle sleeve

1, and 8 outer wall spiro couplings of fixed washer have a plurality of hexagonal socket head fixing bolt 12, and hexagonal socket head fixing bolt 12 is with fixed washer 8 and axle sleeve 1 fixed connection, and in addition, unscrew hexagonal socket head fixing bolt 12 through the hexagonal spanner and can conveniently pull down fixed washer 8 from axle sleeve 1.

Referring to fig. 1, the bushing 2 and the sheath 4 are connected only by the compression spring 3 and not directly, and the design has the advantages that: the lining 2 and the sheath 4 are not in direct contact with each other, so that the damage caused by mutual friction is small, and the service life of the lining 2 and the sheath 4 can be prolonged.

The implementation principle of the mechanical sealing structure in the embodiment of the application is as follows: when the transmission shaft of equipment such as water pump is at the during operation, bush 2, sheath 4, swivel ring 5, solid fixed ring 6, bearing seal fixing base 7 and the solid fixed ring 8 that the transmission shaft outer wall cover was established play sealed effect, make inside and outside space separate, reduced the probability and the degree that the medium in the equipment outwards revealed or the air reveals to the equipment in, first O type ring 9, second O type ring 10, third O type ring 11 and fourth O type ring 13 set up and can further improve mechanical seal's sealed effect.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a mechanical seal structure, includes axle sleeve (1), and axle sleeve (1) cover is established at the transmission shaft outer wall, its characterized in that: axle sleeve (1) outer wall is from supreme cover down in proper order and is equipped with bush (2), sheath (4), rotating ring (5) and solid fixed ring (6), and solid fixed ring (6) outer wall cover is equipped with bearing seal fixing base (7), and solid fixed ring (6) support rotating ring (5), and rotating ring (5) only can rotate around self axis, and the bearing seal is fixed in one end and pastes with sheath (4) outer wall mutually, and the other end pastes with solid fixed ring (6) outer wall mutually.

2. A mechanical seal according to claim 1, wherein: the top end of the transmission shaft is coaxially fixed with a fixed washer (8), and the fixed washer (8) is connected with the shaft sleeve (1) through a hexagon socket head fixing bolt (12).

3. A mechanical seal according to claim 1, wherein: the inner wall of the shaft sleeve (1) is provided with a first annular groove (14), the first annular groove (14) is coaxial with the shaft sleeve (1), and a first O-shaped ring (9) is fixed in the first annular groove (14).

4. A mechanical seal according to claim 1, wherein: a cavity is reserved between the upper portion of the bushing (2) and the shaft sleeve (1), the cavity forms a fifth annular groove (18), a compression spring (3) is arranged in the fifth annular groove (18), one end of the compression spring (3) is connected with the sheath (4), and the other end of the compression spring is connected with the bushing (2).

5. A mechanical seal according to claim 1, wherein: a cavity is reserved between the upper portion of the protective sleeve (4) and the shaft sleeve (1), a second annular groove (15) is formed in the cavity, the rotating ring (5) is located in the second annular groove (15), a second O-shaped ring (10) is fixed to the second annular groove (15), the position of the rotating ring (5) is higher than that of the second O-shaped ring (10), and the rotating ring (5) is attached to the second O-shaped ring (10).

6. A mechanical seal according to claim 1, wherein: a cavity is reserved between the fixing ring (6) and the shaft seal fixing seat (7), a third annular groove (16) is formed in the cavity, and a third O-shaped ring (11) is fixed in the third annular groove (16).

7. A mechanical seal according to claim 1, wherein: the outer wall of the shaft seal fixing seat (7) is provided with a fourth annular groove (17), and a fourth O-shaped ring (13) is fixed in the fourth annular groove (17).

8. A mechanical seal according to claim 1, wherein: the lining (2) is not in direct contact with the sheath (4).