Compressor air cylinder assembly and rotary compressor

Abstract

The invention provides a compressor air cylinder assembly and a rotary compressor. The compressor air cylinder assembly comprises an air cylinder; two cylinder covers which are respectively fixed at two axial ends of the air cylinder; multiple bolts, wherein each bolt comprises a nut, a polished rod part and a threaded part which are arranged in sequence; a plurality of threaded holes which are formed in the end face, making contact with the air cylinder, of at least one cylinder cover; the bolt penetrates through the air cylinder and is connected with the cylinder cover provided with the threaded holes; the threaded part is meshed with the threaded holes, and at least part of the polished rod part of at least one bolt extends into the threaded holes. The compressor air cylinder assembly is provided with the polished rod part partially extending into the threaded holes of the cylinder covers, the maximum contact stress of the area near the threaded holes is reduced through the structure, the contact stress distribution is more uniform, and thus local extrusion deformation caused by torque force at the end, making contact with the air cylinder, of the threaded holes in the bolt fixing process is reduced, and thus the sealing state of the air cylinder and the contact surface near the cylinder cover threaded holes is improved, the leakage of the contact surface is reduced, and the compressor performance is improved.

Description

technical field [0001] The invention relates to the field of compressors, in particular to a compressor cylinder assembly and a rotary compressor. Background technique [0002] The compression assembly of a conventional rolling-rotor compressor usually consists of a cylinder cavity, an upper cylinder head and a lower cylinder head to form a closed compression chamber. The cylinder and the upper and lower cylinder heads are fixed together by bolts. On the one hand, the sealing state between the cylinder and the metal contact surfaces of the upper and lower cylinder heads is guaranteed by arranging the position, quantity and torque of the bolts; The differential pressure of the back pressure presses the metal contact end face to realize the seal. However, due to the influence of the processing state of the metal contact surface, such as: the flatness and roughness of the metal surface, the contact between the two metal end surfaces cannot guarantee that the two are in a compl...

AI Technical Summary

Problems solved by technology

However, affected by the processing state of the metal contact surface, such as: the flatness and roughness of the metal surface, the contact between the two metal end surfaces cannot guarantee a completely sealed state between the two

At the same time, due to the influence of the torque force of the fixing bolts on the contact surface of the cylinder and the upper cylinder head or lower cylinder head, local extrusion deformation occurs in the area around the bolts, which makes the sealing state between the metal end surfaces worse and increases the micro Possibility of leakage, thereby affecting the performance of the compressor

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