CN2083659U - Magnetic thrust machinery sealing device - Google Patents

Abstract

The utility model discloses a magnetic thrust machinery sealing device, which is suitable for the sealing of workpieces which rotate relatively. The utility model comprises a static ring, a moving ring, and a thrust seat, wherein, the dynamic and the thrust seat are provided with a permanent magnet, and the moving ring and the static ring make close contact with each other under the action of magnetic force, reaching the aim of sealing. The utility model has the advantages that the sealing effect is good; the magnetic thrust machinery sealing device is resistant to higher temperature and pressure; the assembly is convenient; the power consumption can be reduced.

Description

Magnetic thrust machinery sealing device

The utility model relates to a kind of improved mechanical seal device, and particularly a kind of magnetic thrust mechanical seal device is suitable for relatively rotating the sealing between parts.

In mechanical seal device, rotating ring, stationary ring seal arrangement are more common a kind of, and its seal action normally utilizes the thrust of pressure spring that rotating ring is closely contacted with stationary ring to reach.In this device, the two ends of spring are separately fixed on spring seat and the rotating ring, go up on one point in the active set of spring thrust to rotating ring, rotating ring and the suffered pressure of stationary ring surface of contact are uneven, growth along with service time, spring thrust can weaken to some extent, will cause the sealing surface bad connection and living seepage phenomenon.In addition, the reaction of spring thrust directly influences on axle, produces certain axial force, needs an axial thrust mechanism, makes troubles to assembling, has also increased the loss of power.

Task of the present utility model provides a kind of improved mechanical seal device, and it can guarantee the sealability of parts, saves axial thrust mechanism, makes parts easy to assembly, can also reduce the loss of power.

Task of the present utility model is finished in the following way, in rotating ring, stationary ring seal arrangement, non-tight face one side at rotating ring is loaded onto a permanent magnet, change spring seat into promotion seat that a side is equipped with permanent magnet, rotating ring and promote seat and make with diamagnetic material, rotating ring is relative with a permanent magnet homopolarity in promoting, produce repulsion, promote rotating ring, its sealing surface one side is closely contacted with corresponding stationary ring sealing surface, thereby reach the purpose of sealing.

The power that magnetic repulsion force acts on the rotating ring sealing surface is uniform, the length of service time is to not influence of magnetic, therefore its sealing effect is better, and the influence that the magnetic of permanent magnet is not stressed, under 150 ℃ condition, do not have obvious variation yet, be particluarly suitable for using in the mechanical device of uniform temperature and pressure.Rely on magnetic to repel each other between rotating ring and the promotion seat, both need not fuse, promoting seat just can be fixed on the body, the reaction force that magnetic repulsion force produced acts directly on the body, just there is not end thrust on the axle, just can save axial thrust mechanism, simplify the assembling of parts, also can remove the power loss of axial thrust from.

Below with reference to accompanying drawing the utility model is described in further detail: among the figure, (1) main shaft; (2) dial Xiao; (3) seal ring; (4) stationary ring; (5) seal ring; (6) rotating ring; (7) permanent magnet; (8) promote seat; (9) body.

As shown in the figure, promoting seat (8) and stationary ring (4) is fixed on the body (9), rotating ring (6) is fixed on the axle with dialling Xiao (2), there is seal ring (3) to prevent seepage between rotating ring (6) and the axle (1), between stationary ring (4) and the body (9) seal ring (5) is housed and prevents seepage, it is relative with permanent magnet (7) homopolarity in the rotating ring (6) to promote seat (8), the repulsion promotion rotating ring that permanent magnet produces, its sealing surface is closely contacted with the stationary ring sealing surface, reach the purpose of sealing.

This installs good seal performance, and is simple in structure, easy to use, is applicable to all kinds of sealings that relatively rotate between parts, is a kind of comparatively ideal seal arrangement.

Claims (1)

1, a kind of magnetic thrust mechanical seal device of being made up of rotating ring, stationary ring is characterized in that a side of rotating ring is equipped with permanent magnet, and has the promotion seat that permanent magnet is housed equally relative with it.

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