CN216642819U

CN216642819U - Machine seal structure

Info

Publication number: CN216642819U
Application number: CN202123252094.6U
Authority: CN
Inventors: 侯吉旭; 高欢; 张辉; 刘军亮; 侯张军
Original assignee: Jingbo Agrochemicals Technology Co Ltd
Current assignee: Shandong Jingbo Agrochemical Technology Co ltd
Priority date: 2021-12-22
Filing date: 2021-12-22
Publication date: 2022-05-31
Anticipated expiration: 2031-12-22

Abstract

The utility model belongs to the field of sealing structures, and particularly provides a novel mechanical seal structure which mainly comprises a shell, a rotating shaft, a movable ring and a static ring, wherein the rotating shaft is rotatably arranged on the shell; the static ring is fixedly connected with the shell; the static ring is connected with the dynamic ring through a bearing; wherein, the outer wall of the static ring is abutted against the inner ring of the bearing; the movable ring is sleeved on the outer ring of the bearing; a spring seat is fixed on the rotating shaft, a spring in a compressed state is arranged between the spring seat and the movable ring, and a sealing ring is arranged on each contact surface to improve the sealing effect; by adopting the mechanical seal structure, the resistance caused by friction is greatly reduced, the loss caused by friction is reduced, the contact area of sliding friction is reduced, the heat generated during friction is reduced, the service life of the mechanical seal is prolonged, and the daily maintenance and repair cost is reduced.

Description

Machine seal structure

Technical Field

The utility model belongs to the field of sealing structures, and particularly provides a novel mechanical seal structure.

Background

The pump class devices such as current water pump, mechanical pump all have mechanical seal structure, for short machine seal structure, and traditional machine seal structure generally includes rotating ring, quiet ring, cooling device and pressure spring, and wherein rotating ring and pivot are connected, and quiet ring and casing are connected, and rotating ring and quiet ring contact each other are compressed tightly by pressure spring, and when the pivot rotated, drive the rotating ring and rotate simultaneously, form the liquid film between rotating ring and quiet ring, make liquid can not leak to play sealed effect.

However, the friction contact area of the moving ring and the static ring of the traditional mechanical seal structure is large, so that the phenomenon of blank-out sometimes occurs in ordinary work, particularly when liquid is blank-out, the friction between the static ring and the moving ring is increased in a short time, so that the temperature is rapidly increased to further damage the mechanical seal, and the whole mechanical seal structure is irreversibly damaged, and in the prior art, a solution for overcoming the problem is also provided by adopting a circulating water cooling mode and the like, for example, the patent application with the application number of 2020229817859, but the technical scheme has the conditions of complex structure, difficult maintenance and the like, and is difficult to widely popularize and apply; therefore, how to better overcome the above problems becomes one of the problems to be solved by those skilled in the art.

Disclosure of Invention

Aiming at various defects in the prior art, the utility model provides a novel mechanical seal structure which mainly comprises a shell, a rotating shaft, a movable ring and a static ring, wherein the rotating shaft is rotatably arranged on the shell; the static ring is fixedly connected with the shell; the static ring is connected with the dynamic ring through a bearing; wherein, the outer wall of the static ring is abutted with the inner ring of the bearing; the movable ring is sleeved on the outer ring of the bearing; a spring seat is fixed on the rotating shaft, a spring in a compressed state is arranged between the spring seat and the movable ring, and a sealing ring is arranged on each contact surface to improve the sealing effect; by adopting the mechanical seal structure, the resistance caused by friction is greatly reduced, the loss caused by friction is reduced, the contact area of sliding friction is reduced, the heat generated during friction is reduced, the service life of the mechanical seal is prolonged, and the daily maintenance and repair cost is reduced.

The specific technical scheme of the utility model is as follows:

a machine seal structure comprises a shell, a rotating shaft, a movable ring and a static ring, wherein the rotating shaft is rotatably arranged on the shell; the static ring is fixedly connected with the shell; the static ring is connected with the dynamic ring through a bearing; wherein, the outer wall of the static ring is abutted with the inner ring of the bearing; the movable ring is sleeved on the outer ring of the bearing; a spring seat is fixed on the rotating shaft, and a spring in a compression state is arranged between the spring seat and the movable ring.

Adopt the machine of this kind of structure to seal the structure, the pivot rotates the back and will rotate the transmission for the rotating ring through the spring, and then the rotating ring also begins to rotate, and the rotating ring cup joints on the bearing this moment, and the inner ring and the quiet ring butt of bearing are because be provided with the bearing in the middle of rotating ring and the quiet ring, can only produce very little friction between rotating ring and the quiet ring. When liquid enters, a liquid film is generated at the contact position of the movable ring and the bearing inner ring, so that the liquid is blocked from flowing out, and a small amount of leaked liquid cannot flow out through the middle position of the sealed bearing. Because above-mentioned technical scheme has adopted the bearing to be connected rotating ring and quiet ring, has avoided direct contact between them, can effectually reduce the resistance that the friction brought, even take place to empty the condition and also can not produce the condition that the temperature sharply risees because of the friction, reduced the damage to whole structure, the life of extension machine seal, reduce daily maintenance and cost of maintenance.

In one embodiment, a sealing ring is arranged between the static ring and the shell; the static ring is fixedly connected with the shell through a fixing pin.

In one embodiment, a seal ring is arranged between the outer wall of the static ring and the inner ring of the bearing.

In one embodiment, a seal ring is disposed between the rotating ring and the outer ring of the bearing.

More specifically, a first sealing groove is formed in the position, where the movable ring is in contact with the bearing, a second sealing groove is formed in the position, where the static ring is in contact with the bearing, and a sealing ring can be arranged between the outer wall of the static ring and the inner ring of the bearing and between the movable ring and the outer ring of the bearing by adopting the design of the sealing grooves.

In one embodiment, a seal ring is disposed between the rotating ring and the rotating shaft.

In one embodiment, the bearing is a sealed bearing.

By adopting the measures, the sealing effect among the parts can be better ensured, and the leakage caused by untight contact of the parts can be avoided.

In one embodiment, the spring seat is fixedly connected to the rotating shaft by a fixing pin.

Preferably, the inner wall of the static ring is not contacted with the rotating shaft, and the inner wall of the dynamic ring is not contacted with the rotating shaft; in special cases there may also be a small amount of contact, maximizing the seal while reducing friction and wear between the parts.

In conclusion, by adopting the mechanical seal structure, the movable ring is in close contact with the bearing outer ring and the bearing inner ring is in close contact with the static ring by using the seal rings and cannot rotate relatively, fluid cannot leak from the middle of the bearing by using the seal bearing, and further sliding friction between the movable ring and the static ring is converted into rolling friction of the bearing, so that resistance and loss caused by friction are greatly reduced, meanwhile, the contact area of the sliding friction is reduced, heat generated during friction is reduced, the service life of the mechanical seal is prolonged, and daily maintenance and maintenance cost is reduced.

Drawings

FIG. 1 is a schematic structural view of a mechanical seal structure according to the present invention;

FIG. 2 is a schematic structural diagram of the contact positions of the moving ring, the static ring and the bearing;

in the figure, 1 is a shell, 2 is a sealing ring, 3 is a stationary ring, 4 is a bearing, 5 is a movable ring, 6 is a spring, 7 is a base, 8 is a rotating shaft, 301 is a second sealing groove, and 501 is a first sealing groove.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. 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.

As shown in fig. 1-2, the present invention provides a machine seal structure, which includes a housing 1, a rotating shaft 8 rotatably mounted on the housing 1, and a moving ring 5 and a stationary ring 3 sleeved on the rotating shaft 8; the static ring 3 is fixedly connected with the shell 1; the static ring 3 is connected with the dynamic ring 5 through a bearing 4; wherein, the outer wall of the static ring 3 is abutted with the inner ring of the bearing 4; the movable ring 5 is sleeved on the outer ring of the bearing 4; a spring seat 7 is fixed on the rotating shaft 8, and a spring 6 in a compressed state is arranged between the spring seat 7 and the movable ring 5;

a second sealing groove 301 is arranged at the position of the static ring 3 corresponding to the bearing 4, and a sealing ring is arranged in the groove;

a first sealing groove 501 is arranged at the position of the movable ring 5 corresponding to the bearing 4, and a sealing ring is arranged in the groove;

the static ring 3 is fixedly connected with the shell 1 through a fixing pin, and a sealing ring 2 is arranged between the static ring 3 and the shell 1;

the spring seat 7 is fixedly connected with the rotating shaft 8 through a fixing pin;

by adopting the measures, the sealing effect among all the parts can be better ensured, and the leakage caused by the untight contact of all the parts is avoided; the preferred bearings used are sealed bearings; the inner wall of the static ring is not contacted with the rotating shaft, and the inner wall of the dynamic ring is not contacted with the rotating shaft; in special cases there may also be a small amount of contact, but preferably no contact, to ensure sealing to the maximum and reduce friction and wear between the parts.

Adopt the machine of this kind of structure to seal the structure, the pivot rotates the back and will rotate the transmission and give the rotating ring through the spring, and then the rotating ring also begins to rotate, and the rotating ring cup joints on the bearing this moment, and the inner ring and the quiet ring butt of bearing are provided with the bearing because the middle of rotating ring and quiet ring, only can produce very little friction between rotating ring and the quiet ring. When liquid enters, a liquid film is generated at the contact position of the movable ring and the bearing inner ring, so that the liquid is prevented from flowing out, and a small amount of leaked liquid cannot flow out from the middle position of the sealed bearing. Because above-mentioned technical scheme has adopted the bearing to be connected rotating ring and quiet ring, has avoided direct contact between them, can effectually reduce the resistance that the friction brought, even take place to empty the condition and also can not produce the condition that the temperature sharply risees because of the friction, reduced the damage to whole structure, the life of extension machine seal, reduce daily maintenance and cost of maintenance.

While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including the preferred embodiment and all changes and modifications that fall within the scope of the utility model.

Claims

1. A machine seal structure comprises a shell (1), a rotating shaft (8) rotatably mounted on the shell (1), and a movable ring (5) and a static ring (3) sleeved on the rotating shaft (8); the method is characterized in that: the static ring (3) is fixedly connected with the shell (1); the static ring (3) is connected with the dynamic ring (5) through a bearing (4); wherein, the outer wall of the static ring (3) is abutted with the inner ring of the bearing (4); the outer ring of the bearing (4) is sleeved with the movable ring (5); a spring seat (7) is fixed on the rotating shaft (8), and a spring (6) in a compression state is arranged between the spring seat (7) and the movable ring (5).

2. The mechanical seal structure of claim 1, wherein: a sealing ring is arranged between the outer wall of the static ring (3) and the inner ring of the bearing (4).

3. The machine seal structure of claim 1 or 2, wherein: a sealing ring is arranged between the movable ring (5) and the outer ring of the bearing (4).

4. The mechanical seal structure of claim 1, wherein: a sealing ring is arranged between the static ring (3) and the shell (1); the static ring (3) is fixedly connected with the shell (1) through a fixing pin.

5. The mechanical seal structure of claim 1, wherein: and a sealing ring is arranged between the movable ring (5) and the rotating shaft (8).

6. The machine seal structure of any one of claims 1, 2, 4, 5, wherein: the spring seat (7) is fixedly connected with the rotating shaft (8) through a fixing pin.

7. The machine seal structure according to any one of claims 1, 2, 4, 5, 6, wherein: the bearing is a sealed bearing.