CN102563078A

CN102563078A - Bidirectional pressure-bearing mechanical seal structure applied to medium containing solid particles

Info

Publication number: CN102563078A
Application number: CN2012100585143A
Authority: CN
Inventors: 李徐佳
Original assignee: DALIAN HUAYANG SEALS Co Ltd
Current assignee: DALIAN HUAYANG SEALS Co Ltd
Priority date: 2012-03-08
Filing date: 2012-03-08
Publication date: 2012-07-11

Abstract

The invention discloses a bidirectional pressure-bearing mechanical seal structure applied to a medium containing solid particles. The structure comprises a spring (1), a drive ring (2), a first pin (3), a compensated ring (4), a first O-shaped ring (5), an un-compensated ring (6), a second O-shaped ring (7) and a second pin (8), wherein the spring (1) is connected to the drive ring (2); the drive ring (2) is connected with the compensated ring (4) through the first pin (3); the first O-shaped ring (5) is arranged on the compensated ring (4); the un-compensated ring (6) is connected with the compensated ring (4); the second O-shaped ring (7) is arranged on the un-compensated ring (6); and the second pin (8) is connected to the un-compensated ring (6). The bidirectional pressure-bearing mechanical seal structure applied to the medium containing the solid particles can be applied under positive pressure or back pressure, and particularly can be applied to the medium containing the solid particles and a high-corrosion medium.

Description

Be applied to contain the bidirectional bearing mechanical seal structure of solid particle medium

Technical field

The present invention relates to a kind of bidirectional bearing mechanical seal structure that is applied to contain solid particle medium.

Background technique

In the existing technology,, mechanical sealing technology there has been higher requirement in order to make efficient, the safe and reliable and long-time continuous running of machinery equipment ability; For the equipment that contains solid particle medium, for preventing that solid particle from getting into seal face and influencing sealability, the general double mechanical seal that adopts the isolating seal liquid that is equipped with pressure; For preventing that solid from getting into seal face, insulating liquid pressure need be higher than pressure medium and get into seal face lubrication and seal end face, under this working condition; The inside pressure that the side medium sealing is born is higher than outside pressure, i.e. backpressure is born in sealing, simultaneously; For avoiding solid particle to block or the dielectric corrosion spring; Also will avoid spring to contact with medium, mechanical seal structure can only bear positive pressure generally speaking mostly, can't be used for the back-pressure operating mode.

Summary of the invention

The purpose of this invention is to provide a kind of bidirectional bearing mechanical seal structure that is applied to contain solid particle medium.

The present invention for realizing the technological scheme that above-mentioned purpose adopted is: a kind of bidirectional bearing mechanical seal structure that is applied to contain solid particle medium; Comprise spring (1), throw-out collar (2), first pin (3), the compensated loop (4), O shape circle (5), uncompensated ring (6), the 2nd O shape circle (7) and second pin (8); Said spring (1) is connected on the throw-out collar (2); Throw-out collar (2) is connected through first pin (3) with compensated loop (4); The one O shape circle (5) is installed on the compensated loop (4); Uncompensated ring (6) is connected with compensated loop (4), and the 2nd O shape circle (7) is installed on the uncompensated ring (6), and second pin (8) is connected on the uncompensated ring (6).

Said compensated loop (4) and uncompensated ring (6) are formed friction pair.

Said O shape circle (5) and the 2nd O shape circle (7) are auxiliary seal.

Said spring (1) and throw-out collar (2) constitute compensation mechanism.

Said first pin (3) and second pin (8) are respectively driving mechanism and rotation-preventing mechanism.

A kind of bidirectional bearing mechanical seal structure that is applied to contain solid particle medium of the present invention can be applied under malleation or the back-pressure operating mode, especially contains the operating mode of solid particle medium and strong corrosive medium.

Description of drawings

Fig. 1 is a kind of structural representation that is applied to contain the bidirectional bearing mechanical seal structure of solid particle medium of the present invention.

Fig. 2 is a kind of bidirectional bearing mechanical seal structure seal and pressure bearing view that is applied to contain solid particle medium of the present invention.

Among the figure: 1, spring; 2, throw-out collar; 3, first pin; 4, compensated loop; 5, O shape circle; 6, uncompensated ring; 7, the 2nd O shape circle; 8, second pin.

Embodiment

As depicted in figs. 1 and 2, be applied to contain the bidirectional bearing mechanical seal structure of solid particle medium, comprise spring 1, throw-out collar 2, first pin 3, compensated loop 4, O shape circle 5, uncompensated ring 6, the 2nd O shape circle 7 and second pin 8; Spring 1 is connected on the throw-out collar 2, and throw-out collar 2 is connected through first pin 3 with compensated loop 4, and O shape circle 5 is installed on the compensated loop 4; Uncompensated ring 6 is connected with compensated loop 4, and the 2nd O shape circle 7 is installed on the uncompensated ring 6, and second pin 8 is connected on the uncompensated ring 6; Compensated loop 4 is formed friction pair with uncompensated ring 6, and O shape circle the 5 and the 2nd O shape circle 7 is auxiliary seals, and spring 1 is formed compensation mechanism with throw-out collar 2; First pin, 3 and second pin 8 is formed transmission and rotation-preventing mechanism, and when equipment work, Seal cage inside is full of fluid partitioning; The outside is full of medium, and O shape circle the 5 and the 2nd O shape circle 7 plays the auxiliary seal effect, because insulating liquid pressure is higher than pressure medium; So interior pressure is born in sealing, the making a concerted effort of medium and insulating liquid an O shape to be enclosed 5 and push away left, the resultant direction that compensated loop 4 receives medium and insulating liquid is left; Functional diameter (FD) is D1 and D4 (internal diameter of active force and external diameter), and the 2nd O shape circle 7 is pushed away to the right, and the resultant direction that uncompensated ring 6 receives medium and insulating liquid to the right; Functional diameter (FD) is D1 and D4 because functional diameter (FD) is identical, so medium that friction pair bears and insulating liquid make a concerted effort cancel out each other; Under the effect of spring force, keeping fits plays the effect of sealing, and when unit exception lateral media pressure was higher than insulating liquid pressure, external pressure was born in sealing; The resultant direction that with joint efforts an O type circle 5 being pushed away to the right of medium and insulating liquid, compensated loop 4 receive medium and insulating liquid still left, functional diameter (FD) is D3 and D2; The 2nd O shape circle 7 is pushed away left, the resultant direction that uncompensated ring 6 receives medium and insulating liquid still to the right, functional diameter (FD) is D3 and D2; Because functional diameter (FD) is identical, thus the medium that friction pair bears and insulating liquid make a concerted effort cancel out each other, appoint so under the effect of spring force, to keep applying to play the effect of sealing; So when the equipment appearance was unusual temporarily, this sealing configuration still can be kept equipment and run well, simultaneously; The one O shape circle 5 stops medium to contact with spring 1, avoids solid particle to block spring, influence compensation shape; Also avoided corrosive dielectric corrosion spring, spring is installed on the static part, receives the influence of centrifugal force when having avoided rotating speed higher.

Claims

1. bidirectional bearing mechanical seal structure that is applied to contain solid particle medium; It is characterized in that: comprise spring (1), throw-out collar (2), first pin (3), the compensated loop (4), O shape circle (5), uncompensated ring (6), the 2nd O shape circle (7) and second pin (8); Said spring (1) is connected on the throw-out collar (2); Throw-out collar (2) is connected through first pin (3) with compensated loop (4), and O shape circle (5) is installed on the compensated loop (4), and uncompensated ring (6) is connected with compensated loop (4); The 2nd O shape circle (7) is installed on the uncompensated ring (6), and second pin (8) is connected on the uncompensated ring (6).

2. a kind of bidirectional bearing mechanical seal structure that is applied to contain solid particle medium according to claim 1 is characterized in that: said compensated loop (4) and uncompensated ring (6) are formed friction pair.

3. a kind of bidirectional bearing mechanical seal structure that is applied to contain solid particle medium according to claim 1 is characterized in that: said O shape circle (5) and the 2nd O shape circle (7) are auxiliary seal.

4. a kind of bidirectional bearing mechanical seal structure that is applied to contain solid particle medium according to claim 1 is characterized in that: said spring (1) and throw-out collar (2) constitute compensation mechanism.

5. a kind of bidirectional bearing mechanical seal structure that is applied to contain solid particle medium according to claim 1 is characterized in that: said first pin (3) and second pin (8) are respectively driving mechanism and rotation-preventing mechanism.