Manufacturing method of large-scale reciprocating type refrigeration compressor

Abstract

The invention discloses a manufacturing method of a large-scale reciprocating type refrigeration compressor, which mainly comprises the following steps of: (1) sorting: selecting appropriate casting iron; (2) casting; (3) milling and rough machining an upper face and a lower face; (4) rough machining three holes and the faces; (5) milling and fine machining the upper face and the lower face; (6) fine machining the three holes and the faces; (7) boring an air cylinder hole; (8) drilling and tapping a cylinder body face, an end cover face and a motor cavity face; (9) honing the surface of the air cylinder hole; (10) plasma quenching the surface of the air cylinder hole; and (11) honing the surface of the air cylinder hole again. The manufacturing method of the large-scale reciprocating type refrigeration compressor has the advantages that the accuracy of a product can be effectively improved; and the hardness of the surface of the air cylinder hole of the product can be improved in a double mode.

Description

technical field [0001] The invention relates to a method for manufacturing a cylinder body of a large reciprocating refrigeration compressor. Background technique [0002] Compressors are classified according to different structural forms as follows: reciprocating (piston) compressors, rotary (rotary) compressors (turbine, water ring, turbine) compressors, axial compressors, jet compressors Machine and screw compressors and other types, of which the most widely used is the reciprocating (piston) compressor. The reciprocating refrigeration compressor is a piston-type compressor in the mechanical part of the refrigeration cycle. Its working principle is as follows: when the crankshaft is driven by the motor to rotate, the piston is reciprocated in the cylinder through the connecting rod. The outer ring of the top of the cylinder is equipped with an annular suction valve plate, and the center of the top is equipped with an annular exhaust valve plate, and valve springs are arr...

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Problems solved by technology

[0003] The main reason for the existing reciprocating refrigeration compressors to be scrapped for a long time is that the working principle of most refrigeration compressors is that the crankshaft in the compressor is driven by an electric motor, the crankshaft is fixed with a piston, and the piston moves on the compressor cylinder Reciprocating mechanical movement, but the contact surface between the compressor housing and the piston is different from the cylinder liner of the internal combustion engine, so long-term use makes the contact surface between the compressor cylinder and the piston seriously worn, because the compressor cylinder is An integral casting and its cost accounts for more than 70% of the manufacturing cost of the entire compressor. The severe wear of the contact surface directly leads to the scrapping of the entire compressor. However, the wear problem of the contact surface of the compressor shell is difficult to avoid and improve, so it is urgently needed A new processing and manufacturing method for a large reciprocating refrigeration compressor cylinder can effectively solve the wear problem of the contact surface of the compressor cylinder, and reduce the degree of wear as much as possible during the normal working cycle of the compressor, so as to Increase the service life of the compressor

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