Double-cylinder compressor pump body and double-cylinder compressor

Abstract

The invention relates to a double-cylinder compressor pump body and a double-cylinder compressor. The double-cylinder compressor pump body comprises a second bearing and an oil pumping cover. The second bearing comprises a second bearing handle part and a second bearing flange, and a groove is formed in the surface of the side, away from a first bearing, of the second bearing flange; and the oil pumping cover comprises a cover body and a fixing plate, the oil pumping cover is detachably fixed to the second bearing, the fixing plate makes contact with the end face of the second bearing flange, an exhaust cavity is defined by the fixing plate and the groove and used for containing high-pressure gas generated in the pump body, the problem that in the prior art, a protrusion is arranged at the oil pumping cover, and the connection position of the protrusion and the bolt fixing position is prone to cracking or breaking due to too large local stress is solved, the service life of the oil pumping cover is prolonged, and the problems that due to the fact that structural strengthening is conducted on the oil pumping cover in a thickening manner and the like, machining difficulty is increased, and cost is increased are solved.

Description

technical field [0001] The invention relates to the technical field of compressors, in particular to a double-cylinder compressor pump body and a double-cylinder compressor. Background technique [0002] The compressor is generally composed of an upper cover, a lower cover, a casing, a motor fixed inside to provide rotational power, and a pump body to realize refrigerant compression. Generally, the pump body includes structures such as an upper bearing, a lower bearing, a cylinder assembly, a piston, and a crankshaft. In particular, for a double-cylinder compressor, an oil pump cover needs to be installed on the handle of the lower bearing to allow the lubricating oil to flow when the compressor is running. It can be continuously supplied to various parts in the pump body that are prone to friction and wear, so as to ensure long-term stable operation of the compressor. [0003] In the prior art, the structure of the pump oil cover is equivalent to that of the current noise-...

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Problems solved by technology

[0003] In the prior art, the structure of the pump oil cover is equivalent to that of the current noise reduction cover. The cover body of the pump oil cover covers the entire end surface of the lower bearing, and is fixed with the end surface of the lower bearing through the screws fixed on the pump body. For the model, since it is necessary to reserve space for the high-pressure gas generated by compressing the refrigerant in the cylinder assembly, in the prior art, a protrusion of a certain height is provided at the oil pump cover to enclose it with the lower bearing to form a row. air cavity, but the pump oil cover needs to be fixed with the lower bearing by bolts, which will cause greater stress on the connection between the pump oil cover protrusion and the bolt fixing part, which is prone to tensile deformation or even The problem of cracks or ruptures in the oil pump cover is difficult to carry out production management; and the structure of the oil pump cover is relatively complicated, and the method of increasing the overall structural strength by increasing the thickness of the oil pump cover will lead to processing difficulty and processing The increase in cost will also lead to a larger space occupied by it, which will affect the realization of miniaturization of the compressor

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