Dry helical lobe compressor host rotor spindle rotor spindle sealing structure

Abstract

The invention relates to a dry screw compressor host machine rotor shaft sealing structure. The invention is characterized in that an air sealing position is divided into two sealing units by two groups of washers; each sealing unit is provided with two stainless steel sealing rings; a stainless steel wave-shaped spring is arranged between two sealing rings; by virtue of the force of the wave-shaped spring, the end surface of the stainless steel sealing ring can be tightly attached to the washer or shell; meanwhile, when the rotor is rotated, the stainless steel sealing ring is floated on the rotor shaft and an oil retaining ring is sleeved on the rotor shaft. The invention has the advantages of stable sealing performance of the floating ring, reliable operation, long service life, simple manufacture, convenient installation, and low production cost; the floating ring has automatic centering function and the sealing ring is basically not abraded; the invention can effectively block intercommunication of oil and gas, reliably ensures the oil to enter the compression chamber and ensures no oil in the provided pressure gas; the non-contact sealing is adopted, and the sealing can be achieved by the pressure reduction produced in sealed fluid.

Description

technical field [0001] The invention relates to a dry screw compressor main engine rotor shaft sealing structure, specifically belongs to the non-contact type sealing, and the sealing is achieved by generating a pressure drop in the sealed fluid. Background technique [0002] Rotor shaft seal is one of the most important structural parts in dry screw compressor mainframe. Its sealing effect has a direct impact on the performance of the compressor. Due to the high speed of the dry screw compressor, it is not suitable to use a contact seal structure such as a mechanical seal. In the past design of compressor host, graphite floating ring seal structure is usually used. This kind of graphite floating ring sealing structure has the following disadvantages: 1. The graphite sealing ring is easy to wear; 2. After the graphite sealing ring is worn, the compressor gas will leak out, and the gas volume of the unit will also decrease accordingly; 3. The service life is short, generall...

AI Technical Summary

Problems solved by technology

This kind of graphite floating ring sealing structure has the following disadvantages: 1. The graphite sealing ring is easy to wear; 2. After the graphite sealing ring is worn out, the compressor gas will leak out, and the gas volume of the unit will also decrease accordingly; 3. The service life is short, generally no more than two Graphite rings need to be replaced every year

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