Self-cleaning type polypropylene recycle gas compressor gas film sealing structure

Abstract

The invention relates to a self-cleaning type polypropylene recycle gas compressor gas film sealing structure which comprises a machine cleaning liquor inlet, a machine body cone, a structure gland, a shaft, a cleaning liquor outlet, a pushing ring, a fixed ring, a clamping ring, a sealing movable ring, an atmospheric side movable ring base, an atmospheric side labyrinth seal, a medium side fixed ring base and a medium side labyrinth seal. The self-cleaning type polypropylene recycle gas compressor gas film sealing structure is characterized in that a sealing structure body comprises the medium side main seal, a bearing side auxiliary seal and the labyrinth seals, cleaning liquor tangentially enters a sealing cavity of the machine body cone from the machine cleaning liquor inlet to form rotational flow, and particles are taken away from the sealing structure. By means of the self-cleaning type polypropylene recycle gas compressor gas film sealing structure, end face friction abrasions are avoided, the sealing stability is improved, and the problems of being short in service life and the like are solved; due to cleaning, temperature rising of the end face is small, energy consumption is low, the sealing performance and the stability are good, and therefore the self-cleaning type polypropylene recycle gas compressor gas film sealing structure has the advantages that the sealing reliability is good, and the maintenance and repairing cost is reduced.

Description

technical field [0001] The invention relates to a sealing structure, in particular to a self-cleaning air film sealing structure of a polypropylene circulating air compressor. Background technique [0002] At present, petrochemical high-temperature and high-viscosity medium pumps are mainly used in the transportation of process media in propane plant asphalt pumps, atmospheric and vacuum distillation, catalytic cracking, hydrogenation and coking plants in the petrochemical refining and chemical industry. Its operating conditions are usually in the state of high temperature and high viscosity, and the transported substances are oil and asphalt medium. Due to the high temperature of the medium, it will cause cracking and fusion of the mechanism, resulting in polymerization reaction, resulting in polymerization product particles, resulting in friction on the end face of the mechanical seal. Wear and tear failure, and then lead to material leakage and cause fire, explosion and o...

AI Technical Summary

Problems solved by technology

Although this structural type of seal can be applied under high temperature and high pressure conditions, the effect of use is not very satisfactory, the maintenance cost is high, the price is expensive, and the service life is short.

"Lubrication and Sealing" May 169, 2005 "Retrofit of Dry Gas Sealing of Circulating Gas Compressor" mentions that the floating sleeve seal of the TBS seal cannot control the constant friction between the dynamic and static sleeves, and its structure is unreliable Therefore, it was decided to retrofit with a dry gas seal

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