1. The utility model provides an electromagnetism auxiliary machinery seal, its characterized in that, includes quiet ring subassembly, rotating ring subassembly and axle sleeve (3), axle sleeve (3) cover is at pivot (10) surface, and the rotating ring subassembly sets up on axle sleeve (3), quiet ring subassembly includes quiet ring (6), and quiet ring (6) inside is provided with electromagnetic conductor (5), the rotating ring subassembly includes rotating ring (1), is provided with the permanent magnet on rotating ring (1), is provided with wear-resistant coating (2) on the permanent magnet, be provided with spring (7) that provide the packing force on quiet ring (6), quiet ring (6) set up with rotating ring (1) relatively.

2. An electromagnetically assisted mechanical seal as claimed in claim 1, characterized in that said stationary ring (6) is provided with graphite (4).

3. An electromagnetically assisted mechanical seal as claimed in claim 1, characterized in that said spring (7) is provided on a spring seat (9), said spring seat (9) being provided with an O-ring (8).

4. An electromagnetically assisted mechanical seal as claimed in claim 1, characterized in that said sleeve (3) is connected to the shaft (10) by means of a set screw.

Background

The mechanical seal mainly takes the sealing effect by forming an oil film between a sealing dynamic ring and a sealing static ring by a liquid phase. In the starting and stopping stage of mechanical seal, because a dynamic pressure lubricating liquid film between seal end faces is not formed, the moving ring and the static ring part are abraded due to relative rotation friction between the moving ring and the static ring part, and the sealing effect is influenced.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide an electromagnetic auxiliary mechanical seal, which is used for solving the problem of abrasion of the sealing end face of the mechanical seal in the starting stage.

In order to achieve the purpose, the invention adopts the technical scheme that:

the utility model provides an electromagnetism auxiliary machinery seal, includes quiet ring subassembly, rotating ring subassembly and axle sleeve 3, 3 covers of axle sleeve are at 10 surfaces of pivot, and the rotating ring subassembly sets up on axle sleeve 3, quiet ring subassembly includes quiet ring 6, and quiet ring 6 is inside to be provided with electromagnetic conductor 5, the rotating ring subassembly includes rotating ring 1, is provided with the permanent magnet on the rotating ring 1, is provided with wear-resistant coating 2 on the permanent magnet, be provided with the spring 7 that provides the packing force on quiet ring 6, quiet ring 6 sets up with rotating ring 1 relatively.

The static ring 6 is provided with graphite 4.

The spring 7 is arranged on a spring seat 9, and an O-shaped ring 8 is arranged on the spring seat 9.

The shaft sleeve 3 is connected with the rotating shaft 10 through a set screw.

The invention has the beneficial effects that:

(1) at the starting stage of the mechanical seal, the pressing force of a part of the spring 7 is counteracted through electromagnetic force, the mechanical friction between the dynamic ring and the static ring is reduced, the forming time of a liquid film on the sealing end surface is shortened, and the abrasion of the dynamic ring and the static ring is further reduced.

(2) In the mechanical seal stopping stage, the impact generated by the disappearance of the liquid film between the movable ring and the static ring can be reduced by the electromagnetic force, and the service life of the mechanical seal is prolonged.

(3) The electromagnetic force has a certain self-adjusting function in the normal operation stage of the mechanical seal, and is helpful for maintaining the stable thickness of the liquid film.

(4) Because the electromagnetic conductor 5 is embedded in the static ring 6, the whole structure is simple and the structural space of mechanical seal is saved.

Drawings

Fig. 1 is a schematic structural view of the present invention.

In the figure: 1. a moving ring; 2. a wear-resistant coating; 3. a shaft sleeve; 4. graphite; 5. an electromagnetic conductor; 6. a stationary ring; 7. a spring; 8. an O-shaped ring; 9. a spring seat; 10. a rotating shaft.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1: the mechanical sealing device comprises a static ring assembly, a moving ring assembly, a spring seat 9, a spring 7, a main shaft and a shaft sleeve 3, wherein the shaft sleeve 3 is sleeved on the outer surface of the main shaft and is connected with the main shaft through a set screw.

The static ring assembly consists of a static ring 6 and an electromagnetic conductor 5 embedded in the static ring 6. The rotating ring assembly is composed of permanent magnets with a wear resistant coating 2.

In the starting stage of the mechanical seal, the electromagnetic conductor 5 on the static ring 6 is electrified to generate electromagnetic force which repels the permanent magnet on the dynamic ring 1, so that a part of pressing force generated by the spring 7 is counteracted, the dynamic ring 1 is assisted to be separated from the static ring 6, and a dynamic pressure liquid film can be formed on the sealing surface more quickly.

At the normal operation stage of the mechanical seal, because the electromagnetic force is influenced by the distance between the movable ring and the static ring 6, when a liquid film on the end face of the mechanical seal becomes thinner, the distance between the movable ring and the static ring becomes smaller, the electromagnetic repulsion force is increased, and the distance between the end faces of the mechanical seal is increased. When the liquid film on the end surface of the mechanical seal becomes thicker, the distance between the dynamic ring and the static ring becomes larger, the electromagnetic repulsion force is reduced, the offset pressing force of the spring 7 becomes smaller, and the distance between the end surfaces of the mechanical seal is reduced again.

In the stopping stage of the mechanical seal, the end face of the mechanical seal can generate friction contact due to the disappearance of the dynamic pressure liquid film, and the electromagnetic repulsion can offset the impact generated by the contact of part of the moving ring 1 and the static ring 6.