CN210218115U

CN210218115U - Mechanical seal for vacuum pump

Info

Publication number: CN210218115U
Application number: CN201921252354.XU
Authority: CN
Inventors: Jiajun Wang; 王家军; Changjiang Wang; 王长江; Changyong Wang; 王长勇
Original assignee: ZIBO BOSHAN DEVELOPMENT ZONE VACUUM EQUIPMENT FACTORY
Current assignee: ZIBO BOSHAN DEVELOPMENT ZONE VACUUM EQUIPMENT FACTORY
Priority date: 2019-08-02
Filing date: 2019-08-02
Publication date: 2020-03-31
Anticipated expiration: 2029-08-02

Abstract

The utility model relates to a vacuum pump mechanical seal belongs to vacuum pump technical field. The utility model provides a problem of the easy hot wearing and tearing sealing member of water pressure unstability that current vacuum pump mechanical seal exists. The utility model discloses a pump shaft, still including setting up the axle sleeve in the pump shaft outside, axle sleeve middle part cover is equipped with the sealing ring, and sealing ring upper portion is equipped with closing device, and the closing device upside is equipped with solid fixed ring, and the closing device symmetry is established in the sealing ring both sides, and the closing device downside of lower part is equipped with solid fixed ring down, and solid fixed ring downside still is equipped with the fixing base rather than suiting in the lower part.

Description

Mechanical seal for vacuum pump

Technical Field

The utility model relates to a vacuum pump mechanical seal belongs to vacuum pump auxiliary device technical field.

Background

In the application process of the water ring vacuum pump, the damage condition of a matched mechanical seal is frequent, and the shutdown and production halt cause huge economic loss to each application enterprise. The damage of the mechanical seal is generally the situation that the temperature is too high due to too long operation time, so that the mechanical seal is damaged or locked due to the fact that the mechanical seal cannot be cooled well. Large vacuum pumps, if damaged, would have to be removed back to the factory for repair. The maintenance cost to the maintenance time causes great waste.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the above-mentioned defect that current vacuum pump exists, provide a vacuum pump mechanical seal, simple structure, reasonable in design.

The utility model discloses an adopt following technical scheme to realize:

a mechanical seal of a vacuum pump comprises a pump shaft and a shaft sleeve arranged on the outer side of the pump shaft, wherein a sealing ring is sleeved in the middle of the shaft sleeve, a pressing device is arranged at the upper part of the sealing ring, an upper fixing ring is arranged on the upper side of the pressing device, the pressing devices are symmetrically arranged on two sides of the sealing ring, a lower fixing ring is arranged on the lower side of the pressing device on the lower part of the pressing device, and a fixing seat matched with the lower fixing ring;

the outside of fixing base and last solid fixed ring be equipped with the cooling jacket, be equipped with coolant inflow passageway on the fixing base, be equipped with coolant outflow passageway on the last solid fixed ring.

The mechanical seal department to water circulating vacuum pump leads to the cooling water and cools off in real time, lets in the cooling water to the inboard through the coolant inflow passageway on the fixing base and the coolant outflow passageway on the solid fixed ring for when mechanical seal can be better sealed, avoid damaging closing device and solid fixed ring because of rotatory too big heat that produces.

Further preferably, the pressing device comprises a plurality of springs arranged in the middle of the sealing ring, the other ends of the springs are pressed on a gasket, the gasket is arranged on a follow-up ring, and the follow-up ring is respectively in close contact with the upper fixing ring and the lower fixing ring.

Preferably, the lower part of the shaft sleeve is provided with a flange, and the flange is connected with the fixed seat in a sealing manner through a second sealing ring.

Further preferably, a first sealing ring is arranged between the follow-up ring and the shaft sleeve.

The utility model has the advantages that:

(1) the mechanical seal of the vacuum pump of the utility model leads cooling water to the inner side through the cooling medium inflow channel on the fixed seat and the cooling medium outflow channel on the upper fixing ring, so that the mechanical seal can be better sealed, and simultaneously, the mechanical seal can avoid the damage to the compressing device and the fixing ring due to the overlarge heat generated by rotation;

(2) vacuum pump mechanical seal, closing device through the symmetry setting to realize that the bi-polar face is sealed, the sealing ring both sides all are equipped with closing device, can be so that follow-up ring and solid fixed ring cooperation are inseparabler, sealed effect is better.

Drawings

Figure 1 is a cross-sectional view of an embodiment of the invention;

in the figure: 1. an upper fixing ring; 2. a follower ring; 3. a seal ring; 4. a gasket; 5. a spring; 6. a first seal ring; 7. a cooling jacket; 8. a fixed seat; 9. a shaft sleeve; 10. a cooling medium inflow passage; 11. a cooling medium outflow passage; 12. a pump shaft; 13. a second seal ring; 14. and a lower fixing ring.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

As shown in fig. 1, the mechanical seal of the vacuum pump of the present invention comprises a pump shaft 12, and further comprises a shaft sleeve 9 disposed outside the pump shaft 12, wherein a sealing ring 3 is sleeved in the middle of the shaft sleeve 9, a pressing device is disposed on the upper portion of the sealing ring 3, an upper fixing ring 1 is disposed on the upper side of the pressing device, the pressing device is symmetrically disposed on two sides of the sealing ring 3, a lower fixing ring 14 is disposed on the lower side of the pressing device on the lower portion, and a fixing seat 8 adapted to the lower fixing ring 14 is further disposed on; the outside of fixing base 8 and upper fixed ring 1 be equipped with cooling jacket 7, be equipped with coolant inflow passageway 10 on the fixing base 8, be equipped with coolant outflow passageway 11 on the upper fixed ring 1. The pressing device comprises a plurality of springs 5 arranged in the middle of the sealing ring 3, the other ends of the springs 5 are pressed on a gasket 4, the gasket 4 is arranged on the follow-up ring 2, and the follow-up ring 2 is respectively in close contact with the upper fixing ring 1 and the lower fixing ring 14. And a flange plate is arranged at the lower part of the shaft sleeve 9 and is in sealing connection with the fixed seat 8 through a second sealing ring 13. A first sealing ring 6 is arranged between the follow-up ring 2 and the shaft sleeve 9.

The utility model discloses a use as follows:

during the use, locate water ring vacuum pump need sealed pump shaft 12 position with this mechanical seal, protect pump shaft 12 through axle sleeve 9, compress tightly sealed with upper fixed ring 1 and follower ring 2 through spring 5, compress tightly sealed with lower fixed ring 14 and follower ring 2 through spring 5 simultaneously, make and play the sealing action between the two, the space in 10 looks cooling jackets 7 of coolant inflow passageway through fixing base 8 lets in the cooling water and cools off, the circulation of cooling water is carried out through coolant outflow passageway 11 on the upper fixed ring 1 again, further improvement cooling effect, reduce mechanical seal's spin friction loss.

The utility model discloses mainly apply to the place that needs seal up of water ring vacuum pump.

Of course, the above description is only a preferred embodiment of the present invention, and should not be taken as limiting the scope of the embodiments of the present invention. The present invention is not limited to the above examples, and the technical field of the present invention is equivalent to the changes and improvements made in the actual range of the present invention, which should be attributed to the patent coverage of the present invention.

Claims

1. A mechanical seal for a vacuum pump, comprising a pump shaft (12), characterized in that: the pump is characterized by further comprising a shaft sleeve (9) arranged on the outer side of the pump shaft (12), a sealing ring (3) is sleeved in the middle of the shaft sleeve (9), a pressing device is arranged on the upper portion of the sealing ring (3), an upper fixing ring (1) is arranged on the upper side of the pressing device, the pressing devices are symmetrically arranged on two sides of the sealing ring (3), a lower fixing ring (14) is arranged on the lower side of the pressing device on the lower portion of the pressing device, and a fixing seat (8) matched with the lower fixing;

the outer sides of the fixing seat (8) and the upper fixing ring (1) are provided with cooling covers (7), a cooling medium inflow channel (10) is arranged on the fixing seat (8), and a cooling medium outflow channel (11) is arranged on the upper fixing ring (1).

2. A vacuum pump mechanical seal according to claim 1, wherein: the pressing device comprises a plurality of springs (5) arranged in the middle of the sealing ring (3), the other ends of the springs (5) are pressed on the gasket (4), the gasket (4) is arranged on the follow-up ring (2), and the follow-up ring (2) is respectively in close contact with the upper fixing ring (1) and the lower fixing ring (14).

3. A vacuum pump mechanical seal according to claim 1, wherein: the lower part of the shaft sleeve (9) is provided with a flange which is connected with the fixed seat (8) in a sealing way through a second sealing ring (13).

4. A vacuum pump mechanical seal according to claim 2, wherein: a first sealing ring (6) is arranged between the follow-up ring (2) and the shaft sleeve (9).