Electromagnetic sealing device of axis for machine halt

Abstract

The invention relates to an axial electromagnetic sealing device which is used for shutdown of the machine and is characterized in that the device mainly comprises a stationary sealing ring, a movable sealing ring, an electromagnet and an elastic return component. The stationary sealing ring is fixedly sleeved on a sealed rotation shaft, one end of the stationary sealing ring is provided with a first sealing face arranged around the rotation shaft; the movable sealing ring is sleeved outside the rotation shaft and is axially supported on the sealed case in a sliding way, the movable sealing ring is provided with a second sealing face which faces the stationary sealing ring and is arranged around the rotation shaft, the first sealing face and the second sealing face form a sealing mouth which cuts off the leakage; the movable sealing ring is a soft magnet or is provided with a soft magnet, the electromagnet is fixed on the case and acts on the movable sealing ring; the elastic return component is arranged on the pedestal and acts on the movable sealing ring; the movable sealing ring and the stationary sealing ring are separated and have no mechanical friction between each other during the operation of the machine, and the electromagnetic seal does not work; when the machine is shut down, the movable sealing ring and the elastic sealing cover all contact closely with the stationary sealing ring, and thus the back-flowing material can be effectively sealed when the pump is shut down.

Description

technical field [0001] The invention relates to the field of fluid sealing of mechanical equipment, in particular to a fluid electromagnetic sealing device used at the rotating shaft of mechanical equipment. The electromagnetic sealing device plays a sealing role when the mechanical equipment stops (that is, the rotating shaft stops rotating). Background technique [0002] In the field of machinery, there are many devices that store or flow pressure fluid inside. Because of the dynamic fit between the rotating shaft and the housing, the seal at the rotating shaft has always been the key to the sealing of the entire device. Fluid pumps are these A typical example of equipment, the following is an illustration of the sealing status of the fluid pump: [0003] At present, some fluid pumps with high sealing requirements, such as sand pumps, slurry pumps, and impurity pumps used in field oil fields, field drilling, industrial and mining, chemical, metallurgical, and pharmaceutic...

AI Technical Summary

Problems solved by technology

On the other hand, it prevents the solid particles in the medium from entering the friction surface of the mechanical seal, reduces the wear of the mechanical seal grinding block, and prolongs the service life of the mechanical seal device. doesn't work after

[0005] In fact, after the equipment that stores or flows through the pressure fluid, especially the fluid pump, part of the material will flow back after it stops working (that is, the shaft stops), the backflowing material will generate a lot of static pressure on the sealing device. At this time, the auxiliary impeller seal does not work, relying only on the mechanical seal, the seal is not reliable, and leakage accidents are prone to occur

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