Centrifugal compressor magnetofluid sealing device

Abstract

The invention discloses a centrifugal compressor magnetofluid sealing device. The device comprises a high-speed rotor shaft arranged in a centrifugal compressor and a sealing shell, the high-speed rotor shaft is set as a magnetizer shaft, an annular permanent magnet is arranged in the sealing shell, and annular magnetic poles are arranged at the left end and the right end of the annular permanentmagnet respectively. Magnetic pole grooves are circumferentially formed in the end faces, close to the magnetizer shaft, of the annular magnetic poles, the magnetic pole grooves are filled with magnetic fluid, the ends, away from the magnetizer shaft, of the magnetic pole grooves are communicated with the ends of channels, the other ends of the channels penetrate through the side walls, away fromthe annular permanent magnet, of the annular magnetic poles and are communicated with connecting pipes, the ends of the connecting pipes are detachably connected with air sources, and constant-temperature assemblies are arranged in the channels. The structure is simple, the sealing performance is excellent, the problem that lubricating oil leaks from the end of the high-speed rotor shaft of the centrifugal compressor can be effectively solved, the stability is good, and the service life is long.

Description

technical field [0001] The invention relates to the technical field of centrifugal compressor shaft end seals, in particular to a magnetic fluid sealing device for a centrifugal compressor. Background technique [0002] Most of the high-speed rotor shaft ends of centrifugal compressors are open. When the main shaft rotates at a high speed of more than 15000r / min, the axial force generated by the high-speed rotor rotation will cause a large pressure in the bearing body cavity, causing the lubricating oil to be thrown along the gap. out, causing oil leakage. The leakage of lubricating oil not only pollutes the environment, but also increases the cost of use and wastes resources. Since the leaked lubricating oil directly contacts the coupling, it has a certain impact on the safety and stability of the coupling. At the same time, the compressor user needs to Frequent addition of new lubricating oil increases maintenance costs. Therefore, there is an urgent need for a sealing d...

AI Technical Summary

Problems solved by technology

[0002] Most of the high-speed rotor shaft ends of centrifugal compressors are open. When the main shaft rotates at a high speed of more than 15000r / min, the axial force generated by the high-speed rotor rotation will cause a large pressure in the bearing body cavity, causing the lubricating oil to be thrown along the gap. out, causing an oil leak

The leakage of lubricating oil not only pollutes the environment, but also increases the cost of use and wastes resources. Since the leaked lubricating oil directly contacts the coupling, it has a certain impact on the safety and stability of the coupling. At the same time, the compressor user needs to New lubricating oil is often added, increasing maintenance costs

Therefore, there is an urgent need for a sealing device for the shaft end of the high-speed rotor of the centrifugal compressor to solve the problem of lubricating oil leakage at the shaft end of the high-speed rotor of the centrifugal compressor

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