Sealing structure and method for refrigerating rotor compressor

Abstract

The invention discloses a sealing structure and method for a refrigerating rotor compressor. Through formation of an oil groove in the seal face of a rotor and / or the seal face of a sliding block, theinterior of the oil groove contains a small amount of oil; the sealing structure can form small air cavities in a sealing belt between an upper cylinder head of a rotor compressor and a rotor or (and) high and low pressure cavities of the end face of a sliding block, and in a sealing belt between a lower cylinder head of the rotor compressor and the rotor or (and) the high and low pressure cavities of the end face of the sliding block; the small air cavities play a role in buffer seal in the process that high pressure gas flows toward the low pressure cavity, and meanwhile a small amount of oil can be caught for compensating oil films of high and low pressure sealing faces back and forth; the oil film play a sealing role in the clearance of the sealing face; even under the blow-away action of high-pressure end gas, the oil films can be moved at the two sides of an oil groove back and forth, and the oil film is formed on the sealing end face all the time; leakage of the high-pressure end gas to the low-pressure end is reduced, and the gas transmission volume of the compressor is ensured; and the power consumption of the compressor is reduced.

Description

technical field [0001] The invention relates to the technical field of rotor compressors, in particular to a sealing structure and sealing method for a refrigeration rotor compressor. Background technique [0002] In the refrigeration industry, the rotary compressor is a common structure widely used, which has high performance, simple structure and low cost. Especially in the air-conditioning industry, it has a high cost performance. Common structures of rotary compressors include rolling rotor type and swing rotor type; figure 1 with figure 2 As shown, it is a swing-type rotor compressor. One side of the rotor is the air inlet (low-pressure end), and the other end has an exhaust port (high-pressure end). There is a small gap between the rotor end face and the end cover, and there is an oil film in the gap , forming an oil film sealing surface. [0003] With the existing rotor sealing structure, there is a small gap between the rotor end face and the end cover. Affected...

AI Technical Summary

Problems solved by technology

For example, the Chinese utility model patent (notification number: CN2528972) disclosed a cylinder assembly with a sealed piston in 2003. A sealing groove is provided on one end face of the integrated piston, and a sealing ring is placed in the sealing groove; The setting of the sealing ring improves the sealing effect between the integrated piston and the upper and lower cylinder heads, but the sealing ring is a consumable, easy to wear and damage, and often needs to be replaced, and the setting of the sealing ring increases the frictional resistance of the end face, increasing power dissipation, affecting swing efficiency

[0005] Another example is the Chinese Utility Model Patent (Notice No.: CN207145234U) which disclosed a oscillating rotor compressor with an end face seal structure in 2018. There is an end face seal groove on the seal end face, and the end face seal cover is set close to the seal end face. Including the end face seal arranged between the end face seal cover and the sealing end face; the setting of the seal improves the airtight stability, but the structure is complicated, and multiple auxiliary accessories are required, which increases the difficulty of assembly and processing

[0006] Moreover, due to the arrangement of components, the above two structures cannot be applied to rolling rotor compressors, and the scope of application is limited.

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