CN112197004A

CN112197004A - Prevent mechanical seal subassembly of leakage

Info

Publication number: CN112197004A
Application number: CN202011083102.6A
Authority: CN
Inventors: 李辉
Original assignee: Jiangmen Teamful Sealing Technology Co ltd
Current assignee: Jiangmen Teamful Sealing Technology Co ltd
Priority date: 2020-10-12
Filing date: 2020-10-12
Publication date: 2021-01-08

Abstract

The invention belongs to the technical field of bearing connection, and discloses a leakage-proof mechanical seal assembly, which comprises a shell, a gland is arranged at the top of the shell, the shell and the interior of the gland are combined to form a sealed liquid storage chamber, a rotating shaft is arranged in the shell and penetrates through the gland, and extends to the outside of the rotating shaft, a static ring, a movable ring, a push ring and a spring seat are sequentially sleeved on the outside of the rotating shaft from top to bottom, the static ring is fixed at the bottom of the gland, and the bottom of the stationary ring is provided with a convex ring, a groove and a sealing rubber sheet, after the convex ring is inserted into the annular groove, the sealing rubber sheet is tightly attached to the two side walls of the convex ring, when the recess follow-up ring rotates, the bulge loop is hugged closely all the time to the sealing rubber piece, has reached the effect sealed with rotating ring and quiet ring contact surface, and liquid is followed this seepage when preventing to rotate, promotes the comprehensive nature that this subassembly seal structure set up.

Description

Prevent mechanical seal subassembly of leakage

Technical Field

The invention belongs to the technical field of bearing connection, and particularly relates to a leakage-proof mechanical seal assembly.

Background

The mechanical seal is a device for preventing fluid leakage, which is formed by at least one pair of end faces perpendicular to the rotation axis, and the end faces are kept in fit and relatively slide under the action of fluid pressure and the elastic force (or magnetic force) of a compensation mechanism and the cooperation of an auxiliary seal. The mechanical seal is a shaft seal device of a rotating machine. Such as centrifugal pumps, centrifuges, reaction kettles, compressors, and the like. Since the drive shaft extends through the inside and outside of the apparatus, there is a circumferential gap between the shaft and the apparatus through which the medium in the apparatus leaks out, and if the pressure in the apparatus is lower than atmospheric pressure, air leaks into the apparatus, so that a shaft seal device must be provided to prevent leakage.

The current mechanical seal subassembly of preventing leaking does not set up seal structure at the contact surface of quiet ring and rotating ring, when the pivot rotates, the inside partial liquid can be followed this seepage to the pivot in, from the pivot outflow casing again, thereby take place to leak, influence the normal clear of work, make mechanical seal subassembly prevent leaking the function and reduce, and adopt O type sealing washer to seal on present mechanical seal subassembly's the quiet ring, traditional O type sealing washer sealing performance is lower, when the pivot rotates, there is a small amount of liquid to leak from the quiet ring outside, lead to the practicality of subassembly to reduce.

Disclosure of Invention

The invention aims to provide a leakage-proof mechanical seal assembly, which aims to solve the problems that the existing mechanical seal assembly leakage-proof seal structure is not completely arranged and the seal arrangement at a static ring is defective.

In order to achieve the purpose, the invention provides the following technical scheme: a leakage-proof mechanical seal assembly comprises a shell, wherein a gland is installed at the top of the shell, the shell and the interior of the gland are combined to form a sealed liquid storage chamber, a rotating shaft is arranged in the shell and penetrates through the gland and extends to the exterior of the shell, a static ring, a moving ring, a push ring and a spring seat are sequentially sleeved outside the rotating shaft from top to bottom, the static ring is fixed at the bottom of the gland, a convex ring is arranged at the bottom of the static ring, a circle of annular groove is formed in the position, corresponding to the convex ring, at the top of the moving ring, two sealing rubber sheets are symmetrically arranged on the inner wall of the groove, the convex ring is matched with the groove, the two sealing rubber sheets are tightly attached to two side walls of the convex ring, the spring seat is fixed on the rotating shaft, the inner wall of the spring seat is sleeved on the outer wall of the moving ring, the top of the push ring is in sealing contact with the moving ring, an auxiliary, the top of the bellows is in contact with the push ring.

Preferably, the upper end of the outer wall of the stationary ring is provided with a second sealing ring, the inner side wall of the gland is provided with a first sealing ring, the first sealing ring is matched with the second sealing ring, and the contact surface of the first sealing ring and the second sealing ring is in a shape of a Chinese character 'gong'.

Preferably, two balls are symmetrically arranged at the upper end of the inner wall of the spring seat, two sliding grooves are symmetrically formed in the outer wall of the movable ring, and the movable ring slides up and down on the inner wall of the spring seat through the matching of the two sliding grooves and the two balls.

Preferably, two anti-rotation pins are symmetrically inserted into the gland in a penetrating manner, each anti-rotation pin is inserted into the top of the stationary ring, and the stationary ring is fixedly connected with the gland through the two anti-rotation pins.

Preferably, a spring pin is transversely inserted into the spring seat, and the spring seat is fixedly connected with the rotating shaft through the spring pin.

Preferably, the lower end of the inner wall of the movable ring is provided with an O-shaped sealing ring, and the movable ring is rotatably connected with the O-shaped sealing ring.

Compared with the prior art, the invention has the following beneficial effects:

(1) the sealing structure is provided with the convex ring, the groove and the sealing rubber sheet, after the convex ring is inserted into the annular groove, the sealing rubber sheet is tightly attached to two side walls of the convex ring, when the groove follow-up ring rotates, the sealing rubber sheet is always tightly attached to the convex ring, the effect of sealing the contact surface of the movable ring and the static ring is achieved, liquid is prevented from leaking from the contact surface during rotation, and the arrangement comprehensiveness of the sealing structure of the assembly is improved.

(2) The sealing ring I and the sealing ring II on the gland are arranged, the sealing ring I on the gland is matched with the sealing ring II on the stationary ring, and the contact surface of the sealing ring I and the sealing ring II is in a bow shape, so that the sealing performance of the position is greatly improved, the leakage of the position is effectively prevented, and the practicability of the mechanical sealing assembly is improved.

Drawings

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

FIG. 2 is a cross-sectional view of the present invention;

FIG. 3 is an enlarged view taken at A in FIG. 1;

FIG. 4 is an enlarged view of FIG. 1 at B;

FIG. 5 is an enlarged view at C of FIG. 1;

in the figure: the sealing device comprises a gland-1, a shell-2, a rotating shaft-3, an anti-rotation pin-4, a static ring-5, a liquid storage chamber-6, a spring pin-7, a moving ring-8, a spring seat-9, an O-shaped sealing ring-10, a push ring-11, a corrugated pipe-12, an auxiliary spring-13, a sealing ring-14, a sealing ring-15, a sealing rubber sheet-16, a convex ring-17, a groove-18, a ball-19 and a chute-20.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, the present invention provides the following technical solutions: a leakproof mechanical seal assembly comprises a shell 2, a gland 1 is installed at the top of the shell 2, the shell 2 and the gland 1 are combined to form a sealed liquid storage chamber 6, a rotating shaft 3 is arranged in the shell 2, the rotating shaft 3 penetrates through the gland 1 and extends to the outside of the gland, a static ring 5, a moving ring 8, a push ring 11 and a spring seat 9 are sequentially sleeved outside the rotating shaft 3 from top to bottom, the static ring 5 is fixed at the bottom of the gland 1 and forms a seal at an outlet of the shell 2, the static ring 5 is made of graphite, the moving ring 8 is made of nitrile rubber, a convex ring 17 is arranged at the bottom of the static ring 5, a circle of annular groove 18 is formed at the top of the moving ring 8 corresponding to the convex ring 17, two sealing rubber sheets 16 are symmetrically arranged on the inner wall of the groove 18, the convex ring 17 is matched with the groove 18, and the two sealing rubber sheets 16 are tightly attached to two side walls of the, when the pivot 3 is rotatory, two sealing rubber pieces 16 are hugged closely all the time, play sealed effect on the contact surface of rotating ring 8 and quiet ring 5, liquid is from this seepage when preventing to rotate, promote the comprehensive nature that this subassembly seal structure set up, spring holder 9 is fixed in on the pivot 3, and the inner wall of spring holder 9 cup joints on the outer wall of rotating ring 8, the top and the rotating ring 8 sealing contact of ejector collar 11, the inside of spring holder 9 is by supreme auxiliary spring 13 and the bellows 12 of having set gradually down, the top and the ejector collar 11 contact of bellows 12, the material of bellows 12 is nitrile rubber.

Furthermore, a second sealing ring 15 is arranged at the upper end of the outer wall of the static ring 5, a first sealing ring 14 is arranged on the inner side wall of the gland 1, the first sealing ring 14 is matched with the second sealing ring 15, and the contact surface of the first sealing ring and the second sealing ring is in a bow shape, so that the sealing performance of the position is improved.

Furthermore, two balls 19 are symmetrically arranged at the upper end of the inner wall of the spring seat 9, two sliding grooves 20 are symmetrically formed in the outer wall of the moving ring 8, the moving ring 8 slides up and down on the inner wall of the spring seat 9 through the matching of the two sliding grooves 20 and the two balls 19, the friction resistance when the moving ring 8 slides is reduced, the moving ring 8 is not prone to inclined deviation when sliding due to the sleeved connection mode, and the stability of the moving ring is improved.

Specifically, two anti-rotation pins 4 are symmetrically inserted into the gland 1, each anti-rotation pin 4 is inserted into the top of the corresponding static ring 5, and the static rings 5 are fixedly connected with the gland 1 through the two anti-rotation pins 4, so that the static rings 5 are fixed with the gland 1.

It should be noted that the spring seat 9 is transversely inserted with the spring pin 7, and the spring seat 9 is fixedly connected with the rotating shaft 3 through the spring pin 7.

Further, the lower end of the inner wall of the movable ring 8 is provided with an O-shaped sealing ring 10 for sealing, and the movable ring 8 is rotatably connected with the O-shaped sealing ring 10.

The working principle and the using process of the invention are as follows: when the invention is used, a worker firstly fixes the spring seat 9 on the rotating shaft 3 through the spring pin 7, then sequentially sleeves the auxiliary spring 13, the corrugated pipe 12, the push ring 11, the O-shaped sealing ring 10 and the movable ring 8 on the rotating shaft 3, the outer wall of the movable ring 8 is contacted with the inner wall of the spring seat 9, the movable ring 8 can slide in the chute 20 through the ball 19, and the movable ring 8 is rotationally connected with the O-shaped sealing ring 10;

inserting a convex ring 17 at the bottom of a static ring 5 into a groove 18 at the top of a movable ring 8, enabling two sealing rubber sheets 16 to be tightly attached to two side walls of the convex ring 17, forming a sealing structure on a contact surface of the static ring 5 and the movable ring 8, then matching a first sealing ring 14 on a gland 1 with a second sealing ring 15 on the static ring 5 to form a bow-shaped contact surface, improving the sealing performance of the position, respectively penetrating two anti-rotation pins 4 through the gland 1 to be inserted into the top of the static ring 5, fixing the static ring 5 and the gland 1 to prevent the static ring 5 from loosening, and finally installing the whole assembly at the outlet of a rotating shaft 3 of a shell 2 through matching sealing of the gland 1 and the shell 2 to realize shaft sealing;

when the rotating shaft 3 rotates, the first sealing ring 14 is matched with the second sealing ring 15, the sealing rubber sheet 16 is tightly attached to two side walls of the convex ring 17 and the O-shaped sealing ring 10 to play a sealing role, the rotating shaft 3 drives the movable ring 8 to vibrate towards the spring seat 9, the movable ring 8 slides on the ball 19 on the spring seat 9 through the chute 20, the movable ring 8 pushes the push ring 11 to move towards the bottom of the spring seat 9, the push ring 11 applies pressure to the corrugated pipe 12 and the auxiliary spring 13, so that the corrugated pipe 12 and the auxiliary spring 13 are in a compression state, wherein the elastic force of the corrugated pipe 12 is small, the auxiliary spring 13 plays a role in protecting the corrugated pipe 12, when the downward vibration of the rotating shaft 3 disappears, the corrugated pipe 12 and the auxiliary spring 13 move upwards, so that the movable ring 8 resets.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A leak-proof mechanical seal assembly comprising a housing (2), characterized in that: the sealing device is characterized in that a gland (1) is installed at the top of a shell (2), the shell (2) and the gland (1) are combined to form a sealed liquid storage chamber (6), a rotating shaft (3) is arranged in the shell (2), the rotating shaft (3) penetrates through the gland (1) and extends to the outside of the gland, a static ring (5), a moving ring (8), a push ring (11) and a spring seat (9) are sequentially sleeved outside the rotating shaft (3) from top to bottom, the static ring (5) is fixed at the bottom of the gland (1), a convex ring (17) is arranged at the bottom of the static ring (5), a circle of annular groove (18) is formed in the position of the convex ring (17) corresponding to the top of the moving ring (8), two sealing rubber sheets (16) are symmetrically arranged on the inner wall of the groove (18), the convex ring (17) is matched with the groove (18), and the two sealing rubber sheets (16) are tightly attached to the two side walls of the convex ring, spring holder (9) are fixed in on pivot (3), and the inner wall of spring holder (9) cup joints on the outer wall of rotating ring (8), the top and rotating ring (8) sealing contact of push ring (11), the inside of spring holder (9) has set gradually auxiliary spring (13) and bellows (12) from lower supreme, the top and the push ring (11) contact of bellows (12).

2. A leak resistant mechanical seal assembly according to claim 1, wherein: the upper end of the outer wall of the static ring (5) is provided with a second sealing ring (15), the inner side wall of the gland (1) is provided with a first sealing ring (14), the first sealing ring (14) is matched with the second sealing ring (15), and the contact surface of the first sealing ring and the second sealing ring is in a shape of a Chinese character 'gong'.

3. A leak resistant mechanical seal assembly according to claim 1, wherein: two balls (19) are symmetrically arranged at the upper end of the inner wall of the spring seat (9), two sliding grooves (20) are symmetrically formed in the outer wall of the movable ring (8), and the movable ring (8) slides up and down on the inner wall of the spring seat (9) through the matching of the two sliding grooves (20) and the two balls (19).

4. A leak resistant mechanical seal assembly according to claim 1, wherein: two anti-rotation pins (4) are symmetrically inserted into the gland (1), each anti-rotation pin (4) is inserted into the top of the stationary ring (5), and the stationary ring (5) is fixedly connected with the gland (1) through the two anti-rotation pins (4).

5. A leak resistant mechanical seal assembly according to claim 1, wherein: a spring pin (7) is transversely inserted into the spring seat (9), and the spring seat (9) is fixedly connected with the rotating shaft (3) through the spring pin (7).

6. A leak resistant mechanical seal assembly according to claim 1, wherein: an O-shaped sealing ring (10) is arranged at the lower end of the inner wall of the movable ring (8), and the movable ring (8) is rotatably connected with the O-shaped sealing ring (10).