rotary compressor

Abstract

The invention discloses a rotary compressor, comprising: a casing, a compression assembly, a motor assembly, a first frame and a support assembly. The outer peripheral wall of the first frame is fixed on the inner wall of the shell, and the main bearing, auxiliary bearing or cylinder or other parts such as partitions of the compression assembly are fixedly connected to the first frame. The support assembly includes a second frame and an auxiliary bearing, the outer peripheral wall of the second frame is fixed on the inner wall of the casing, the auxiliary bearing is fixed on the upper surface of the second frame and the auxiliary bearing is sleeved on the upper part of the crankshaft. According to the rotary compressor of the present invention, the combination of the compression assembly and the rotor is transitionally connected to the shell through the first frame and the second frame, which improves the assembly accuracy and ensures that the air gap between the stator and rotor of the motor is uniform, and each The wear between the bearing and the crankshaft is small, the noise is small, and the torque power consumption is low when the crankshaft rotates, and the unbalance of the motor gap is small, so that the small gap assembly of the motor stator and rotor is realized. And the structure of the compressor is simple and reasonable, and the reliability is good.

Description

technical field [0001] The invention relates to the field of compressors, in particular to a rotary compressor. Background technique [0002] With the development of compressor technology and the improvement of high efficiency requirements, the height of the rotary compressor motor is gradually increased, the motor speed is getting higher and higher, the diameter of the crankshaft is getting smaller and smaller, the ratio of length to diameter is getting bigger, and the rigidity of the crankshaft is getting higher and higher. The worse it is, the ability to resist deformation is gradually reduced. The ensuing problem is that due to the unbalanced electromagnetic tension in the motor gap, the crankshaft of the compressor is elastically deformed at the moment of starting, causing the rotor to collide with the inner diameter of the stator. At the same time, the increase of the motor speed increases the centrifugal force of the rotor, and the end of the rotor often scrapes and ...

AI Technical Summary

Problems solved by technology

However, there are some problems in these solutions, so the compressor with double support structure has not been applied in mass production. The specific problems are as follows:

[0005] First of all, the welding and fixing of the first support cannot guarantee the motor stator and rotor clearance requirements of small clearance and low unbalance required for high efficiency;

[0006] Second, the parallelism between the two supports cannot be guaranteed. Even if the second support is aligned with the auxiliary bearing and the crankshaft, the position of the auxiliary bearing will change due to the influence of the reference after tightening, making it difficult to ensure that the auxiliary bearing is aligned with the crankshaft. Uniformity of crankshaft clearance

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