Dual-support rotary type compressor

Abstract

The invention relates to a dual-support rotary type compressor, which comprises a motor assembly and a compression assembly which are arranged in a shell, wherein the motor assembly comprises a stator fixed on the shell and a rotor which is closely combined with a crank shaft in the shell; the compression assembly comprises an air cylinder, the crank shaft, and a primary bearing and a secondary bearing which are arranged on the upper and lower end faces of the air cylinder; an eccentric part of the crank shaft is connected with a piston positioned in the air cylinder; the compression assemblyalso comprises a first support and a second support which are used for fixing the compression assembly on the shell; the first support is positioned on the compression assembly positioned at one end of the motor assembly, and the second support is positioned at the other end of the motor assembly; and the second support is connected with one end of the crank shaft by a bearing arranged on the second support. The dual-support rotary type compressor is characterized in that: the second support also comprises a support connected with the shell; and the bearing is connected with the support by a core-adjusting mechanism. The dual-support rotary type compressor has the characteristics of simple and reasonable structure, small friction between the bearing and the crank shaft, low noise, low torsion power consumption during the rotation of the crank shaft and high reliability.

Description

technical field [0001] The invention relates to a rotary compressor, especially a rotary compressor with double supports. Background technique [0002] Based on the purpose of high efficiency, the height of the motor of the rotary compressor is gradually increased, and the shaft diameter of the crankshaft is gradually reduced. In this way, during operation, the crankshaft and the rotor of the motor swing together to a large extent, resulting in a gap between the stator and the rotor. In addition, due to the swing of the crankshaft, the wear between the crankshaft and the compression assembly increases, which eventually leads to poor reliability of the rotary compressor. [0003] In order to improve this situation, patents and documents related to double-support assembly schemes have appeared one after another at home and abroad, that is, in addition to setting a support on the compression assembly located at the lower end of the motor, another support is provided at the uppe...

AI Technical Summary

Problems solved by technology

[0002] Based on the purpose of high efficiency, the height of the motor of the rotary compressor is gradually increased, and the shaft diameter of the crankshaft is gradually reduced. In this way, during operation, the crankshaft and the rotor of the motor swing together to a large extent, resulting in a gap between the stator and the rotor. Scuffing occurs; in addition, increased wear between the crankshaft and the compression assembly due to crankshaft wobbles, ultimately resulting in poor reliability of the rotary compressor

[0003] In order to improve this situation, patents and documents related to double-support assembly schemes have appeared one after another at home and abroad, that is, in addition to setting a support on the compression assembly located at the lower end of the motor, another support is provided at the upper end of the housing, that is, the upper end of the motor. However, it is a pity that in these double support assembly schemes, the bearing in the other support is simply to limit the crankshaft, and there is no clearance fit between the bearing and the crankshaft, and there is an inevitable gap between the bearing and the crankshaft. There is an initial assembly force. Although this assembly scheme can realize the limit of the bearing to the crankshaft, the wear of the crankshaft increases due to the existence of the initial assembly force. In addition, the bearing in another support is insufficiently supplied with oil and poorly lubricated. Ultimately, the reliability deteriorates, and at the same time, it brings negative effects of low energy efficiency and high noise

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