Method for assembling pump body of double-cylinder rotary compressor

Abstract

The invention provides a method for assembling a pump body of a double-cylinder rotary compressor. The method can enhance the precision of the pump body assembly gap, has the advantages of simple procedure and low cost, can ensure the assembly quality and can meet the requirements for large batch production. The method comprises the following steps: adjustment of upper eccentric gap: adjusting the difference, namely the value of the upper eccentric gap between the maximum distance from the outer diameter of an upper roller to the outer diameter at the opposite side of the major axis of the crank shaft and the distance from the inner circle of the upper cylinder to the inner circle of the upper flange at the opposite side, so that the value of the upper eccentric gap is within the preset range of 10-50 mu m; adjustment of lower eccentric gap: adjusting the difference, namely the value of the lower eccentric gap between the maximum distance from the outer diameter of the lower roller to the outer diameter at the same side of the minor axis of the crank shaft and the distance from the inner circle of the lower cylinder to the outer circle at the same side of the minor axis of the crank shaft, so that the value of the lower eccentric gap is within the preset range of 10-50 mu m; and concentric assembly: concentrically assembling the upper flange and the lower flange.

Description

technical field [0001] The invention belongs to the technical field of compressor production, and in particular relates to a method for assembling a pump body of a double-cylinder rotary compressor. Background technique [0002] In the existing rotary compressor, the main part of the pump body is composed of the crankshaft, the cylinder and the flange, and the assembly gap between the parts in the compressor pump body directly leads to the leakage of the high and low pressure chambers inside the compressor. This clearance leakage includes eccentric clearance leakage (the gap between the outer diameter of the roller and the inner diameter of the cylinder), clearance leakage of the slide slot, and clearance leakage in the height direction of the cylinder, roller and slide. Among the three kinds of clearance leakage, eccentric leakage occupies a large proportion, so how to control the eccentric clearance plays an important role in improving the performance of the compressor. C...

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Problems solved by technology

[0003] In addition, because the double-cylinder compressor has two eccentric circles with a phase difference of 180 degrees, the operating torque fluctuation is much smaller than that of the single-cylinder compressor, so its vibration and noise are smaller than that of the single-cylinder compressor, which is favored by users, but Due to the complex structure of the double cylinder, it is difficult to assemble the pump body

In the assembly of the double-cylinder pump body, since two eccentric adjustments are involved, there are many assembly sequences and assembly combinations of various parts, and the assembly process is very complicated.

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