CN210623563U

CN210623563U - Coaxial double-speed mechanical seal

Info

Publication number: CN210623563U
Application number: CN201921813664.4U
Authority: CN
Inventors: 田立勤; 杜成传; 张铭轩
Original assignee: Zibo Nuofende Chemical Equipment Technology Co Ltd
Current assignee: Zibo Nuofende Chemical Equipment Technology Co Ltd
Priority date: 2019-10-25
Filing date: 2019-10-25
Publication date: 2020-05-26
Anticipated expiration: 2029-10-25

Abstract

The utility model relates to the technical field of mechanical seal, in particular to a coaxial double-speed mechanical seal, which comprises an installation base and a machine body fixedly connected with an inner stirring shaft, wherein the upper end and the lower end of the machine body are respectively provided with an upper spring and a lower spring, the upper end of the upper spring is sequentially provided with an upper push ring, an upper movable ring and an upper static ring, the lower end of the lower spring is sequentially provided with a lower push ring, a lower movable ring and a lower static ring, and the coaxial double-speed mechanical seal also comprises an outer stirring seal sleeve fixedly installed on the outer stirring shaft, and the outer stirring seal sleeve is fixedly connected with the lower static ring; the utility model discloses double speed stirring seal has solved on same axis, and when two different rotational speeds, same rotational speed or rotation opposite direction's (mixing) shaft rotated simultaneously, the technical problem of a (mixing) shaft can only be sealed to traditional mechanical seal.

Description

Coaxial double-speed mechanical seal

Technical Field

The utility model relates to a mechanical seal technical field, concretely relates to coaxial double speed mechanical seal.

Background

At present, two are on same axis, when the (mixing) shaft of different rotational speeds or same rotational speed rotated simultaneously, traditional mechanical seal can only seal a (mixing) shaft, can not seal two (mixing) shafts respectively, this can bring great difficulty to chemical production enterprise, for example to the production of water based paint, coaxial double speed stirring is used more in the water based paint trade now, but this kind of mixing system is open basically, the jar body can't be sealed, multiple solvent need be added to the production technology of water based paint, the solvent had both existed flammable risk in the stirring of open container, it is still relatively more volatile, cause the pollution to the environment, cause harm to the human body.

Therefore, a two-speed mechanical seal is urgently needed at present to solve the problem of sealing the coaxial two-speed stirring tank body.

SUMMERY OF THE UTILITY MODEL

In order to solve the defects in the technical problem, the utility model aims to provide a: the coaxial double-speed mechanical seal can solve the problem of coaxial double-speed stirring seal of a tank body, prevent liquid leakage, is environment-friendly and efficient, and improves production yield.

The utility model discloses a solve the technical scheme that its technical problem adopted and do:

the coaxial double-speed mechanical seal comprises an installation base and a machine body fixedly connected with an inner stirring shaft, wherein an upper spring and a lower spring are respectively arranged at the upper end and the lower end of the machine body, an upper push ring, an upper movable ring and an upper static ring are sequentially arranged at the upper end of the upper spring, a lower push ring, a lower movable ring and a lower static ring are sequentially arranged at the lower end of the lower spring, and the coaxial double-speed mechanical seal further comprises an outer stirring seal sleeve fixedly arranged on the outer stirring shaft, and the outer stirring seal sleeve is fixedly connected with the lower static ring.

Preferably, the upper end of the installation base is provided with the water chamber, the two sides of the water chamber are respectively provided with the water inlet and the water outlet, the whole mechanical seal can be cooled, and heat is taken away.

Preferably, all set up the recess on the upper push ring and the lower push ring, set up the arch that suits with the recess on the limiting plate in the organism outside.

Preferably, first O-shaped rings are arranged between the upper rotating ring, the upper push ring and the inner stirring shaft, second O-shaped rings are arranged between the lower rotating ring, the lower push ring and the inner stirring shaft, third O-shaped rings are arranged between the outer stirring sealing sleeve and the outer stirring shaft, an upper static ring sealing ring is arranged on the outer side of the upper static ring, and a lower static ring sealing ring is arranged on the outer side of the lower static ring.

Preferably, the outer stirring sealing sleeve is fixedly connected with the outer stirring shaft through a retaining screw, and the machine body is fixed on the inner stirring shaft through a tightening screw.

Preferably, the upper rotating ring and the lower rotating ring are made of silicon carbide, so that the heat-resistant and wear-resistant composite material is heat-resistant, high in hardness, long in service life and suitable for various chemical processes.

Compared with the prior art, the utility model discloses following beneficial effect has:

the utility model discloses double speed stirring seal has solved on same axis, and when two different rotational speeds, same rotational speed or rotation opposite direction's (mixing) shaft rotated simultaneously, the technical problem of a (mixing) shaft can only be sealed to traditional mechanical seal. The reaction vessel can bear conditions of positive pressure, negative pressure, heating and the like, and the stirring form is diversified, so that the method has great significance for industries such as coating, paint, waterproof coating and the like, and is beneficial to process improvement of the industries. Under the sealed condition, gas and liquid in the reaction container cannot leak out, the solvent cannot volatilize, the cost is saved, and harmful substances generated in the reaction process cannot harm people and the environment. In addition, the material can not enter in a sealed environment, the quality of a finished product can be improved, and the method is particularly suitable for large-scale production.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic view of the groove structure of the present invention.

In the figure: 1. an inner stirring shaft; 2. an upper stationary ring; 3. an upper stationary ring seal ring; 4. an upper moving ring; 5. a first O-ring; 6. pushing up the ring; 7. an upper spring; 8. a water outlet; 9. a body; 10. jacking the screw tightly; 11. a lower spring; 12. a push ring is pushed down; 13. a second O-ring; 14. a lower moving ring; 15. a lower stationary ring seal ring; 16. an outer stirring sealing sleeve; 17. a third O-ring; 18. a lower stationary ring; 19. an outer stirring shaft; 20. oil sealing; 21. installing a base; 22. a retaining screw; 23. a water inlet; 24. a water chamber; 25. a limiting plate; 26. and (4) a groove.

Detailed Description

The embodiments of the present invention will be further described with reference to the accompanying drawings:

example 1

As shown in fig. 1-2, the coaxial double-speed mechanical seal of the present invention comprises a mounting base 21 and a body 9 fixedly connected to an inner stirring shaft 1, wherein the body 9 is fixed to the inner stirring shaft 1 by a tightening screw 10 and can rotate together with the inner stirring shaft 1, an upper spring 7 and a lower spring 11 are respectively disposed at upper and lower ends of the body 9, an upper push ring 6, an upper movable ring 4 and an upper stationary ring 2 are sequentially disposed at an upper end of the upper spring 7, a lower push ring 12, a lower movable ring 14 and a lower stationary ring 18 are sequentially disposed at a lower end of the lower spring 11, grooves 26 are disposed on the upper push ring 6 and the lower push ring 12, protrusions adapted to the grooves 26 are disposed on a limiting plate 25 outside the body 9, and since the grooves 26 are engaged with the protrusions, the body 9 can drive the upper push ring 6 and the lower push ring 12 to rotate together when rotating, and further comprises an outer stirring sealing sleeve 16 fixedly mounted on an outer stirring shaft 19, the mounting base 21 and the outer stirring shaft 19 are sealed through an oil seal 20, the outer stirring sealing sleeve 16 and the outer stirring shaft 19 are fixedly connected through a retaining screw 22, the outer stirring sealing sleeve 16 and the lower stationary ring 18 are fixedly connected through an anti-rotation pin, and therefore the outer stirring shaft 19 can sequentially drive the outer stirring sealing sleeve 16 and the lower stationary ring 18 to rotate.

Wherein, the upper end of installation base 21 sets up hydroecium 24, and the both sides of hydroecium 24 set up water inlet 23 and delivery port 8 respectively, and water inlet 23 sets up in the lower part of hydroecium 24, and delivery port 8 sets up on the upper portion of hydroecium 24, and messenger's rivers that can be abundant like this seal the contact with the machine, can cool down whole mechanical seal, take away the heat.

In addition, a first O-shaped ring 5 is arranged between the upper rotating ring 4, the upper push ring 6 and the inner stirring shaft 1, a second O-shaped ring 13 is arranged between the lower rotating ring 14, the lower push ring 12 and the inner stirring shaft 1, a third O-shaped ring 17 is arranged between the outer stirring sealing sleeve 16 and the outer stirring shaft 19, an upper static ring sealing ring 3 is arranged on the outer side of the upper static ring 2, and a lower static ring sealing ring 15 is arranged on the outer side of the lower static ring 18, so that the sealing effect is mainly achieved, and the material is not leaked.

In addition, the upper movable ring 4 and the lower movable ring 14 are made of silicon carbide, so that the heat-resistant and wear-resistant composite material is high in hardness, long in service life and suitable for various chemical processes.

The utility model discloses a concrete use:

when the stirring device is used, when the inner stirring shaft 1 rotates, the inner stirring shaft 1 drives the machine body 9 to rotate, because the machine body 9 is fixedly connected with the upper push ring 6 and the lower push ring 12 respectively, the upper push ring 6 and the lower push ring 12 are driven to rotate, and finally the upper movable ring 4 and the lower movable ring 14 are driven to rotate, in the rotating process, the upper spring 7 tightly pushes the upper push ring 6 upwards, under the thrust action of the upper push ring 6, the end surfaces of the upper movable ring 4 and the upper static ring 2 are tightly attached to form sealing, the lower spring 11 tightly pushes the lower push ring 12 downwards, and under the thrust action of the lower push ring 12, the end surfaces of the lower movable ring 14 and the lower static ring 18 are tightly attached to form sealing. In addition, the first O-ring 5 and the second O-ring 13 can seal the reaction vessel, so that materials cannot leak.

When the outer stirring shaft 19 is rotated, because the outer stirring sealing sleeve 16 is fixedly connected with the outer stirring shaft 19 through the retaining screw 22, and then the outer stirring sealing sleeve 16 is driven to rotate together, when the outer stirring sealing sleeve 16 is rotated, because the lower static ring 18 is fixedly connected with the outer stirring sealing sleeve 16 through the anti-rotation pin, and then the lower static ring 18 is driven to rotate simultaneously, in the rotating process, the lower static ring 18 depends on the lower spring 11 to sequentially give the thrust of the lower push ring 12 and the lower dynamic ring 14, so that the end surfaces of the lower dynamic ring 14 and the lower static ring 18 are tightly attached to form sealing, and the outer stirring shaft 19 and the outer stirring sealing sleeve 16 are also sealed through the third O-shaped ring 17, thereby ensuring that the reaction container is not leaked.

In addition, when each part operates for a long time and the temperature of the part is too high, cooling water flows into the water cavity from the water inlet 23 to cool the whole mechanical seal and flows out from the water outlet 8 to take away heat, so that the effect of cooling is achieved.

In the description of the present invention, the terms "inside", "outside", "longitudinal", "lateral", "up", "down", "top", "bottom", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description of the present invention rather than requiring the present invention to be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

Claims

1. The utility model provides a coaxial double speed mechanical seal, includes installation base (21) and organism (9) that meets with interior (mixing) shaft (1) is fixed, its characterized in that, the upper and lower both ends of organism (9) set up spring (7) and lower spring (11) respectively, the upper end of going up spring (7) sets gradually push-up ring (6), goes up rotating ring (4) and goes up quiet ring (2), the lower extreme of lower spring (11) sets gradually down push-up ring (12), lower rotating ring (14) and quiet ring (18) down, still includes outer stirring seal cover (16) of fixed mounting on outer (mixing) shaft (19), outer stirring seal cover (16) meet with quiet ring (18) are fixed down.

2. Coaxial two-speed mechanical seal according to claim 1, characterized in that the upper end of the mounting base (21) is provided with a water chamber (24), and the two sides of the water chamber (24) are respectively provided with a water inlet (23) and a water outlet (8).

3. Coaxial two-speed mechanical seal according to claim 1, characterized in that the push-up ring (6) and the push-down ring (12) are both provided with a groove (26), and a limiting plate (25) outside the body (9) is provided with a protrusion adapted to the groove (26).

4. The coaxial double-speed mechanical seal according to claim 1, characterized in that a first O-ring (5) is arranged between the upper rotating ring (4), the upper push ring (6) and the inner stirring shaft (1), a second O-ring (13) is arranged between the lower rotating ring (14), the lower push ring (12) and the inner stirring shaft (1), a third O-ring (17) is arranged between the outer stirring sealing sleeve (16) and the outer stirring shaft (19), an upper stationary ring sealing ring (3) is arranged on the outer side of the upper stationary ring (2), and a lower stationary ring sealing ring (15) is arranged on the outer side of the lower stationary ring (18).

5. The coaxial double-speed mechanical seal according to claim 1, characterized in that the outer stirring gland (16) is fixedly connected with the outer stirring shaft (19) through a retaining screw (22), and the body (9) is fixed on the inner stirring shaft (1) through a tightening screw (10).

6. Coaxial two-speed mechanical seal according to claim 1 or 4, characterised in that the upper rotating ring (4) and the lower rotating ring (14) are made of silicon carbide.