CN211667157U - Structure of mechanical combined sealing element - Google Patents

Abstract

The utility model provides a structure of mechanical combined sealing member, include: the end cover, the driving ring, the shaft sleeve, the movable ring seat, the movable ring and the first stationary ring; the front side of the end cover is provided with a driving ring, and the driving ring is connected with the end cover through a limiting block and a hexagon bolt; an end cover gasket is arranged on the rear side surface of the end cover and connected with the end cover in an embedding mode; a movable ring seat is arranged at the rear side of the end cover; a first stationary ring is arranged on the inner side of the end cover, and a second stationary ring is arranged between the first stationary ring and the end cover; a movable ring is arranged on the rear side of the first stationary ring and is embedded in the movable ring seat; the utility model discloses an improvement to a mechanical combined sealing member's structure, it is reasonable to have a structural design, and the rotating ring can be under the effect of spring axial automatic compensation, guarantees on the terminal surface of rotating ring is all the time press-fit to the terminal surface of first quiet ring, prevents the advantage that whole mechanical seal device became invalid to effectual problem and the not enough that has solved the current device and appear.

Description

The structure of a mechanical combined seal

technical field

The utility model relates to the technical field of mechanical seals, in particular to the structure of a mechanical combined seal.

Background technique

Mechanical seal refers to a device that prevents fluid leakage by keeping at least a pair of end faces perpendicular to the rotation axis under the action of fluid pressure and the elastic force of the compensation mechanism and the cooperation of auxiliary seals to keep fit and slide relatively.

The mechanical seal is a shaft seal device of a rotating machine. In the environment where some fluids are used, the internal spring is affected by the fluid, so that the spring will crystallize in fluid, and the moving ring or static ring will be worn, causing it to fail and make it The function of the compensation adjustment of the mechanical seal fails to affect the sealing effect.

In view of this, the existing problems are studied and improved, and a structure of a mechanical combined seal is provided to solve the problem that the compensation adjustment function of the existing mechanical seal fails and affects the sealing effect. technology to achieve the purpose of solving problems and improving practical value.

Utility model content

The purpose of the present invention is to provide a structure of a mechanical combined seal, so as to solve the problems and deficiencies that the compensation adjustment function of the mechanical seal proposed in the above-mentioned background art fails and affects the sealing effect.

In order to achieve the above purpose, the present utility model provides a structure of a mechanically combined seal, which is achieved by the following specific technical means:

The structure of a mechanical combined seal includes: an end cover, a drive ring, a shaft sleeve, a moving ring seat, a moving ring, a first static ring, an end cover gasket, a spring, a shaft sleeve sealing ring, a moving ring sealing ring, static ring, limit block, transmission pin, anti-rotation pin; the front side of the end cover is provided with a drive ring, and the drive ring and the end cover are connected by the limit block and hexagonal bolts; the rear side of the end cover An end cover gasket is provided, and the end cover gasket and the end cover are connected by embedding; the rear side of the end cover is provided with a moving ring seat; the inner side of the end cover is provided with a first static ring, and the first A second static ring is arranged between the static ring and the end cover; a moving ring is arranged on the rear side of the first static ring, and the moving ring is embedded in the inside of the moving ring seat; the inside of the moving ring seat is provided with a moving ring A sealing ring, and the moving ring sealing ring and the moving ring seat are connected by inlay; the inside of the moving ring seat is provided with a spring and a transmission pin, and the spring and the transmission pin are connected with the moving ring seat by an inlay method; the shaft The inner rear end of the sleeve is provided with a shaft sleeve sealing ring, and the shaft sleeve sealing ring and the shaft sleeve are connected in an embedded manner; an anti-rotation pin is arranged on the end cover.

As a further optimization of the technical solution, the structure of a mechanically combined seal of the present invention is provided with six circular counterbores in an annular array in the moving ring seat, and springs are placed in the counterbores.

As a further optimization of the technical solution, the structure of a mechanical combined seal of the present invention is provided with a circular countersunk hole matched with a transmission pin in the moving ring seat, and the transmission pin is arranged on two adjacent springs. between.

As a further optimization of this technical solution, the structure of a mechanically combined seal of the present invention is characterized in that the outer shape of the first static ring is a stepped circular structure, and the front end of the first static ring is provided with a "squat"-shaped a notch, and the anti-rotation pin is arranged in the notch.

As a further optimization of the technical solution, the structure of a mechanically combined seal of the present invention is characterized in that the outer shape of the shaft sleeve is a stepped circular structure, and the rear end step of the shaft sleeve is provided with a "crawl"-shaped notch , and the transmission pin is arranged in the notch.

As a further optimization of this technical solution, the structure of a mechanically combined seal of the present invention is provided with four threaded holes in an annular array at the front end of the shaft sleeve, and set screws are arranged in the threaded holes, and the shaft The sleeve and the end cover are connected by set screws.

As a further optimization of the technical solution, the structure of a mechanical combined seal of the present invention is provided with a hook-shaped groove inside the rear end of the movable ring seat, and a movable ring seal ring is arranged in the hook-shaped groove.

As a further optimization of the technical solution, the structure of a mechanically combined seal of the present invention is provided with a hook-shaped groove inside the rear end of the shaft sleeve, and a shaft sleeve sealing ring is arranged in the hook-shaped groove.

Due to the application of the above-mentioned technical solutions, the present invention has the following advantages compared with the prior art:

1. In the present invention, six circular countersinks with annular arrays are arranged in the moving ring seat, and a spring is placed in the countersinking hole, and the moving ring can automatically compensate axially under the action of the spring to ensure that the end face of the moving ring is always pressed. Fitted to the end face of the first static ring to prevent the failure of the entire mechanical seal device.

2. In the present invention, the shape of the second static ring is a stepped circular structure, and the front end of the second static ring is provided with a "crawl"-shaped notch, and the anti-rotation pin is arranged in the notch to prevent the static ring from rotating.

3. The utility model has a stepped annular structure through the shape of the shaft sleeve, and the rear end step of the shaft sleeve is provided with a "crawl"-shaped notch, and the transmission pin is arranged in the notch to make the moving ring drive.

4. By improving the structure of a mechanical combined seal, the present utility model has a reasonable structure design, and the dynamic ring can automatically compensate axially under the action of the spring to ensure that the end face of the dynamic ring is always press-fitted to the first static ring. It has the advantage of preventing the failure of the entire mechanical sealing device on the end face of the utility model, thereby effectively solving the problems and deficiencies proposed in the background art of the present invention.

Description of drawings

The accompanying drawings constituting a part of the present application are used to provide further understanding of the present invention, and the schematic embodiments of the present invention and descriptions thereof are used to explain the present invention and do not constitute an improper limitation of the present invention. In the attached image:

Fig. 1 is the longitudinal sectional structure schematic diagram of the present utility model;

Fig. 2 is the cross-sectional structural schematic diagram of the utility model;

3 is a schematic diagram of the axonometric structure of the present invention;

Fig. 4 is the first static ring structure schematic diagram of the present utility model;

5 is a schematic diagram of the shaft sleeve structure of the present invention;

FIG. 6 is a schematic view of the structure of the moving ring seat of the present invention.

In the figure: end cover 1, drive ring 2, shaft sleeve 3, moving ring seat 4, moving ring 5, first static ring 6, end cover gasket 7, spring 8, shaft sleeve sealing ring 9, moving ring sealing ring 10 , The second static ring 11 , the limit block 12 , the transmission pin 13 , and the anti-rotation pin 14 .

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example.

It should be noted that, in the description of the present utility model, unless otherwise specified, the meaning of "plurality" is two or more; the terms "upper", "lower", "left", "right", " The orientation or positional relationship indicated by "inside", "outside", "front end", "rear end", "head", "tail", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility. The novel and simplified description does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention.

Furthermore, the terms "first," "second," "third," etc. are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

Meanwhile, in the description of the present invention, unless otherwise expressly specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integral connection ; It can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

Please refer to FIG. 1 to FIG. 6 , the present utility model provides a specific technical embodiment of the structure of a mechanically combined seal:

A structure of a mechanical combined seal, comprising: an end cover 1, a drive ring 2, a shaft sleeve 3, a moving ring seat 4, a moving ring 5, a first static ring 6, an end cover gasket 7, a spring 8, a shaft sleeve The sealing ring 9, the dynamic ring sealing ring 10, the second static ring 11, the limit block 12, the transmission pin 13, the anti-rotation pin 14; the front side of the end cover 1 is provided with a driving ring 2, and the driving ring 2 and the end cover 1 Connected by the limit block 12 and hexagonal bolts; the end cover gasket 7 is provided on the rear side of the end cover 1, and the end cover gasket 7 is connected with the end cover 1 by embedding; the rear side of the end cover 1 is provided with The dynamic ring seat 4; the inner side of the end cover 1 is provided with a first static ring 6, and a second static ring 11 is provided between the first static ring 6 and the end cover 1; the rear side of the first static ring 6 is provided with a dynamic ring 5, and the moving ring 5 is embedded inside the moving ring seat 4; the moving ring seat 4 is provided with a moving ring sealing ring 10, and the moving ring sealing ring 10 and the moving ring seat 4 are connected by inlaying; the moving ring seat 4 A spring 8 and a transmission pin 13 are arranged inside the shaft sleeve, and the spring 8 and the transmission pin 13 are connected with the moving ring seat 4 by embedding; the inner rear end of the shaft sleeve 3 is provided with a shaft sleeve sealing ring 9, and the shaft sleeve sealing ring 9 It is connected with the shaft sleeve 3 by embedding; the end cover 1 is provided with an anti-rotation pin 14 .

Specifically, the moving ring seat 4 is provided with six circular countersunk holes in an annular array, and a spring 8 is placed in the counterbore. The moving ring 5 can automatically compensate axially under the action of the spring to ensure that the end face of the moving ring 5 is always Press fit to the end face of the first static ring 6 to prevent the failure of the entire mechanical seal device.

Specifically, a circular counterbore matched with the transmission pin 13 is provided in the movable ring seat 4, and the transmission pin 13 is arranged between two adjacent springs, so that the movable ring 5 is driven.

Specifically, the outer shape of the first static ring 6 is a stepped circular structure, and the front end of the first static ring 6 is provided with a "scratch"-shaped notch, and the anti-rotation pin 14 is arranged in the notch to prevent the first static ring 6 Turn.

Specifically, the outer shape of the shaft sleeve 3 is a stepped annular structure, and the rear end step of the shaft sleeve 3 is provided with a "crawl"-shaped notch, and the transmission pin 13 is arranged in the notch to make the moving ring 5 drive.

Specifically, the front end of the shaft sleeve 3 is provided with four threaded holes in an annular array, and the threaded holes are provided with set screws, and the shaft sleeve 3 and the end cover 1 are connected by the set screws.

Specifically, a hook-shaped groove is arranged inside the rear end of the moving ring seat 4, and a moving ring sealing ring 10 is arranged in the hook-shaped groove, as an auxiliary seal, the sealing performance is safe and reliable.

Specifically, a hook-shaped groove is arranged inside the rear end of the shaft sleeve 3, and a shaft sleeve sealing ring 9 is arranged in the hook-shaped groove, as an auxiliary seal, and the sealing performance is safe and reliable.

Specific implementation steps:

When using the structure of the mechanical combined seal, the six annular arrays of springs 8 in the moving ring seat 4 enable the moving ring 5 to automatically compensate axially under the action of the springs, ensuring that the end face of the moving ring 5 is always press-fitted To the end face of the first static ring 6, to prevent the failure of the entire mechanical seal device, in addition, the driving pin 13 in the moving ring seat 4 makes the moving ring 5 drive, and at the same time the "slip"-shaped gap in the first static ring 6 The anti-rotation pin 14 prevents the first stationary ring 6 from rotating, and at the same time, a moving ring sealing ring 10 is installed in the hook-shaped groove inside the rear end of the moving ring seat 4, and a hook-shaped groove inside the rear end of the shaft sleeve 3 is installed with The shaft sleeve sealing ring 9, as an auxiliary seal, has safe and reliable sealing performance. The structure of the mechanical combined seal has a reasonable structural design, and the moving ring can automatically compensate in the axial direction under the action of the spring to ensure that the end face of the moving ring is always press fit To the end face of the static ring, the advantage of preventing the failure of the entire mechanical seal device meets the needs of the mechanical seal.

To sum up, the structure of the mechanical combined seal is provided with six circular countersunk holes in an annular array in the moving ring seat, and a spring is placed in the countersunk hole, and the moving ring can rotate under the action of the spring. To automatically compensate to ensure that the end face of the moving ring is always press-fitted to the end face of the static ring to prevent the failure of the entire mechanical seal; and the anti-rotation pin is arranged in the notch to prevent the rotation of the static ring; the shape feature of the shaft sleeve is a stepped circular structure, and the rear end step of the shaft sleeve is provided with a "crawl"-shaped notch, and the transmission pin It is arranged in the gap to make the moving ring drive; through the improvement of the structure of a mechanical combined seal, it has a reasonable structure design, and the moving ring can automatically compensate axially under the action of the spring to ensure that the end face of the moving ring is always press fit To the end face of the static ring, it has the advantage of preventing the failure of the entire mechanical sealing device, thereby effectively solving the problems and deficiencies proposed in the background art of the present invention.

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

Claims (8)

1. A structure of a mechanical composite seal, comprising: the device comprises an end cover (1), a driving ring (2), a shaft sleeve (3), a movable ring seat (4), a movable ring (5), a first static ring (6), an end cover gasket (7), a spring (8), a shaft sleeve sealing ring (9), a movable ring sealing ring (10), a second static ring (11), a limiting block (12), a transmission pin (13) and an anti-rotation pin (14); the method is characterized in that: the front side of the end cover (1) is provided with a driving ring (2), and the driving ring (2) is connected with the end cover (1) through a limiting block (12) and a hexagon bolt; an end cover gasket (7) is arranged on the rear side surface of the end cover (1), and the end cover gasket (7) is connected with the end cover (1) in an embedding mode; a movable ring seat (4) is arranged on the rear side of the end cover (1); a first stationary ring (6) is arranged on the inner side of the end cover (1), and a second stationary ring (11) is arranged between the first stationary ring (6) and the end cover (1); a movable ring (5) is arranged on the rear side of the first stationary ring (6), and the movable ring (5) is embedded in the movable ring seat (4); a moving ring sealing ring (10) is arranged inside the moving ring seat (4), and the moving ring sealing ring (10) is connected with the moving ring seat (4) in an embedding manner; a spring (8) and a transmission pin (13) are arranged inside the movable ring seat (4), and the spring (8) and the transmission pin (13) are connected with the movable ring seat (4) in an embedding mode; a shaft sleeve sealing ring (9) is arranged at the rear end of the interior of the shaft sleeve (3), and the shaft sleeve sealing ring (9) is connected with the shaft sleeve (3) in an embedding mode; the end cover (1) is provided with an anti-rotation pin (14).

2. A mechanical composite seal arrangement according to claim 1, wherein: six circular counter bores in an annular array are arranged in the movable ring seat (4), and springs (8) are placed in the counter bores.

3. A mechanical composite seal arrangement according to claim 1, wherein: a circular counter bore matched with the transmission pin (13) is formed in the movable ring seat (4), and the transmission pin (13) is arranged between every two adjacent springs.

4. A mechanical composite seal arrangement according to claim 1, wherein: the appearance characteristic of first quiet ring (6) is step ring form structure, and the front end of first quiet ring (6) is provided with the breach of "T" form to anti-rotating pin (14) set up in the breach.

5. A mechanical composite seal arrangement according to claim 1, wherein: the appearance characteristic of axle sleeve (3) is step ring structure, and is provided with the breach of "T" form on the rear end step of axle sleeve (3) to driving pin (13) set up in the breach.

6. A mechanical composite seal arrangement according to claim 1, wherein: the front end of the shaft sleeve (3) is provided with four threaded holes in an annular array, set screws are arranged in the threaded holes, and the shaft sleeve (3) is connected with the end cover (1) through the set screws.

7. A mechanical composite seal arrangement according to claim 1, wherein: a hook-shaped groove is formed in the inner portion of the rear end of the movable ring seat (4), and a movable ring sealing ring (10) is arranged in the hook-shaped groove.

8. A mechanical composite seal arrangement according to claim 1, wherein: and a hook-shaped groove is formed in the inner part of the rear end of the shaft sleeve (3), and a shaft sleeve sealing ring (9) is arranged in the hook-shaped groove.

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