Balance weight of a rotary compressor and a two-cylinder two-stage compressor having the same

Abstract

The invention provides a balancing weight (1) of a rotary compressor. The balancing weight comprises a balancing weight base plate (11), wherein the balancing weight base plate is of a flat disc shape, and comprises an upper circular surface and a lower circular surface. A balancing weight main eccentric portion (12) and a balancing weight auxiliary eccentric portion (13) are arranged on the upper circular surface and the lower circular surface respectively, and are oppositely arranged by circling the circle center of the disc-shaped balancing weight base plate (11). The balancing weight base plate (11), the balancing weight main eccentric portion (12) and the balancing weight auxiliary eccentric portion (13) are of an integrally formed structure. By the adoption of the balancing weight, only one mold needs to be opened, and the balancing weight main eccentric portion and the balancing weight auxiliary eccentric portion can be manufactured, so that compared with the cost of respective mold opening manufacturing in the prior art, the cost is greatly reduced. In addition, due to the fact that the angle between the balancing weight main eccentric portion and the balancing weight auxiliary eccentric portion is relatively fixed, the assembling process is simple, the assembling efficiency is remarkably improved, the phenomenon of assembling errors cannot exist, and the vibration noise of the compressor can be guaranteed. The invention further relates to a double-cylinder double-stage compressor with the balancing weight.

Description

technical field [0001] The invention belongs to the technical field of compressors, refrigeration and air conditioning, and in particular relates to a balance block of a rotary compressor and a double-cylinder, two-stage compressor with the same. Background technique [0002] With the application of two-cylinder two-stage compressors more and more widely, the eccentric space of the crankshaft roller of the two-cylinder two-stage compressor is designed symmetrically at 180°, and the eccentricity of the lower cylinder is large, and the eccentricity of the upper cylinder is small. As far as the system is concerned, since the difference between the upper and lower cylinders is not particularly large, the balancing weight load required by the balance weight is small, resulting in the eccentric parts of the main and auxiliary balance weights that are distributed symmetrically at 180° in space on the upper and lower end faces of the rotor in the traditional way Short in height, lig...

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Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the existence of the compressor in the prior art that the main and auxiliary balance weights need to be opened separately, thereby increasing the cost of mold opening, and the assembly is complicated, and it is easy to install the wrong angle, which affects the balance of the system, resulting in Due to the defect of high vibration and noise of the compressor, a balance weight of a rotary compressor and a two-cylinder two-stage compressor having the same are provided

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