CN200978827Y

CN200978827Y - Mechanical seal for pump

Info

Publication number: CN200978827Y
Application number: CN 200620123419
Authority: CN
Inventors: 徐永祥; 张爱民; 李东宇; 蒋传利
Original assignee: China Petroleum and Natural Gas Co Ltd
Current assignee: China Petroleum and Natural Gas Co Ltd
Priority date: 2006-08-04
Filing date: 2006-08-04
Publication date: 2007-11-21
Anticipated expiration: 2016-08-04

Abstract

The utility model relates to a mechanical sealing of a pump comprising a tightening pin 1, a spring seat 2, a spring 3, a thrust ring 4, a stop pin 5, a rotor ring 6, a rotor ring seal ring 7, a stator ring 9, a stator ring seal ring 10, a stop pin 11, a gland 12, a flushing fluid inlet 13, a pump shaft 14, which is characterized in that the spring seat 2 is radially lengthened, a sleeve is made based on the original spring seat, the other end of the sleeve presses directly on the outer ring of the rotor ring 6, the inner ring of the sleeve is sealed using a O-ring 8, the spring 3 is isolated from the solution in the sleeve. The utility model is capable of prolonging the service life of the mechanical and has the advantage of simple structure, and is capable of utilizing to flush the machine or the pump that the suspended substance in the solution is too much and the suspended substance is easy to lump or crystallize, thereby affecting the elastic effect of the mechanical seal spring.

Description

A kind of mechanical seal of pump

Technical field

The utility model relates to the seal arrangement of chemical industry solutions pump, the mechanical seal of the high solution pump of Sulpher content that is particularly useful for suspending.

Background technique

At present, the solution pump that the suspension Sulpher content is high, for example, desulfur pump mechanical seal structure comprises parts such as rotating ring, stationary ring, metal spring, stationary ring seal ring, seal ring of moving ring, spring seat, thrust ring, anti-rotation pin and Cock screw.Mechanical seal is by the pressure of spring and sealing medium, produces suitable impacting force on the contact surface of the rotating ring of rotation and stationary ring, and these two end faces are fitted tightly, keep between end face one deck as thin as a wafer liquid film and reach the purpose of sealing.This layer liquid film has hydrodynamic pressure and static pressure, plays a part lubricated and balance pressure.The spring of mechanical seal is soaked in the rinse solution generally speaking, but for the high solution pump of suspension Sulpher content, because the content of suspension sulphur has increased several times in the solution, cause spring often to be filled up by the sulphur cream in the solution, and be not suitable for cleaning through outer flushing, so that do not reach the elasticity requirement, do not had impacting force, cause the leakage of mechanical seal.

Summary of the invention

In order to overcome the deficiencies in the prior art, the utility model provides a kind of mechanical seal, and this mechanical seal can prolong its service cycle, satisfies and produces needs.

The technical solution adopted in the utility model is as follows:

The mechanical seal of pump of the present utility model, comprise: tightening pin 1, spring seat 2, spring 3, thrust ring 4, anti-rotation pin 5, rotating ring 6, seal ring of moving ring 7, stationary ring 9, stationary ring seal ring 10, stop pin 11, gland 12, washing solution inlet 13, pump shaft 14, it is characterized in that spring seat 2 is radially extended, on former spring seat basis, make a cover, the other end of cover directly is pressed on the outer ring of rotating ring 6, the inner ring of cover adds 8 sealings of O type circle, and spring 3 is kept apart with solution in cover.

The beneficial effects of the utility model are, spring and rinse solution in the mechanical seal are effectively isolated, can rely on the pressure of spring and sealing medium to produce suitable impacting force better at the rotating ring of rotation and the contact surface of stationary ring, these two end faces are fitted tightly, keep between end face one deck as thin as a wafer liquid film and reach the purpose of sealing; Can prolonged mechanical working life of sealing, and this model utility has characteristic of simple structure, can be used for more and easy caking of suspended matter of rinse solution suspended matter or crystallization and has influence on the machine, pump of mechanical seal spring effect.

Description of drawings

Accompanying drawing 1 is the structure principle chart of mechanical seal of the prior art.

In the accompanying drawing 1:

1, tightening pin; 2. spring seat; 3. spring; 4. thrust ring; 5. anti-rotation pin; 6. rotating ring; 7. seal ring of moving ring; 9. stationary ring; 10. stationary ring seal ring; 11. stop pin; 12. gland; 13. washing solution inlet; 14. pump shaft.

Accompanying drawing 2 is a structure principle chart of the present utility model.

In the accompanying drawing:

1, tightening pin; 2. spring seat; 3. spring; 4. thrust ring; 5. anti-rotation pin; 6. rotating ring; 7. seal ring of moving ring; 8.O type circle; 9. stationary ring; 10. stationary ring seal ring; 11. stop pin; 12. gland; 13. washing solution inlet; 14. pump shaft.

Embodiment

Adopt the mechanical seal shown in the accompanying drawing 1, when pump shaft (14) rotates, drive rotating ring (6) running by Cock screw (1) and spring (3), stop pin (11) is fixed on the static gland (12), prevent that stationary ring (9) from rotating, when seal face weares and teares, rotating ring (6) together with seal ring of moving ring (7) under the promotion of spring (3), produce minute movement vertically, reach certain compensation ability.Sealing between rotating ring (6) and pump shaft (14) fitting surface because of moving axially and seal with compensated loop.

Adopt the mechanical seal shown in the accompanying drawing 1, spring seat (2) radial growth is taken spring housing out of, and spring housing is pressed on the rotating ring (6), and spring housing is inner to be sealed with O type circle (8), and the washing solution that enters from washing solution hole (13) can not be entered the slit of spring.

Claims

1. the mechanical seal of a pump, comprise: tightening pin (1), spring seat (2), spring (3), thrust ring (4), anti-rotation pin (5), rotating ring (6), seal ring of moving ring (7), stationary ring (9), stationary ring seal ring (10), stop pin (11), gland (12), washing solution inlet (13), pump shaft (14), it is characterized in that spring seat (2) is radially extended, on former spring seat basis, make a cover, the other end of cover directly is pressed on the outer ring of rotating ring (6), the inner ring of cover adds O type circle (8) sealing, and spring (3) is kept apart with solution in cover.