Compressor

Abstract

The invention discloses a compressor. The compressor comprises a bearing seat, a rotary shaft, a bearing and a sealing component, wherein the bearing seat is provided with a shaft hole; a coolant side and an oil side are separately arranged on two sides of the bearing seat; the surface, facing to the coolant side, of the bearing seat is provided with a matching groove which is separated from the shaft hole; an oil passage is defined in the bearing seat; the oil passage separately communicates with the shaft hole and the matching groove; the rotary shaft is arranged in the shaft hole; the outer peripheral wall, located on the coolant side, of the rotary shaft is provided with a sealing bulge; the bearing is arranged in the shaft hole and sleeves the rotary shaft; the sealing component is located on the coolant side and sleeves the rotary shaft; the sealing component is provided with a matching part and a moving part; the moving part is movably matched in the matching groove; the matching part is located between the sealing bulge and the bearing seat; and the matching part is provided with a sealing surface which can be in surface contact with the sealing bulge. According to the compressor, high sealing requirement can be met at any time during use; especially requirement of use at special working conditions can be met; meanwhile, the sealing component is simple in structure; and sealing length is shortened.

Description

technical field [0001] The invention relates to the field of compressors. Background technique [0002] The bearings of refrigeration compressors generally adopt dynamic pressure sliding bearings. The lubricating oil enters the bearing through the booster pump for lubrication and then flows out from both ends of the bearing. There is generally a certain pressure in the return oil of the bearing. In order to prevent lubricating oil from entering the fluorine system, an oil-repelling seal is provided on the side of the bearing close to the fluorine system. The high speed of the rotating shaft of the refrigeration compressor makes the linear speed of the seal high, so the seal generally does not use a contact seal but a labyrinth seal (the contact type wears more and is prone to high temperature). [0003] The side pressure of the sealed fluorine system is relatively high when the unit is in normal working conditions, and the kinetic energy of the lubricating oil can quickly d...

AI Technical Summary

Problems solved by technology

[0003] The side pressure of the sealed fluorine system is relatively high when the unit is in normal working conditions, and the kinetic energy of the lubricating oil can quickly decay until it stops flowing when it passes through the labyrinth seal. When the pressure on both sides is equal, the kinetic energy of the lubricating oil decays slowly, and the ideal sealing effect is often not achieved, and oil leakage from the seal occurs.

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