Internally meshed rotor compressor

Abstract

The invention discloses an internally meshed rotor compressor. The compressor comprises an upper end plate, a lower end plate, an internal rotor, an external rotor, a cylinder and a main shaft, wherein the cylinder is arranged between the upper end plate and the lower end plate; an external rotor hole is eccentrically reserved in the cylinder; the external rotor is positioned in the external rotor hole; the external rotor and the external rotor hole are in clearance arrangement; a support column through hole is reserved on the cylinder and is communicated with the external rotor hole; a support column is arranged in the support column through hole; and the support column is in linear contact connection with the external rotor. Therefore, the compressor can guarantee that the internal rotor and the external rotor of the cylinder are correctly meshed so as to complete the process of aspiration, compression and exhaustion; at the same time, because the external rotor and the cylinder are separated by the support column and the position of the support column is in the direction of an action line of a support force, the support force can be greatly reduced; and because the support column is in rolling friction with the external cylindrical surface of the external rotor, the friction coefficient is greatly reduced and the reliability is greatly increased.

Description

technical field [0001] The invention belongs to the field of rotary positive displacement compressors, relates to a compressor body, in particular to an internal meshing rotor compressor. Background technique [0002] Generally speaking, a compressor is a machine that compresses gas. According to its different shapes, it can be divided into two categories: volume type and speed type, and volume type can be divided into reciprocating type and rotary type. For example, the former has a reciprocating piston. Compressors, free piston compressors, and the latter include rolling rotor compressors, scroll compressors, and sliding vane compressors. Due to the simple structure, low manufacturing cost and good operation reliability of rotary positive displacement compressors, reciprocating positive displacement compressors have been replaced in many fields. [0003] When a rotary positive displacement compressor is used in a fully enclosed refrigeration system, it generally includes ...

AI Technical Summary

Problems solved by technology

from figure 1 It can be seen from the structure that there is a speed difference between the outer cylindrical surface of the outer rotor 4' and the inner cylindrical surface of the outer rotor hole 10a' on the conventional cylinder 2', which is similar to the working mode of a sliding bearing, although it is introduced through the oil inlet hole 10b' Lubricating oil fills the gap between the two. In theory, it is hoped that there will be no direct metal sliding friction between the two, and at the same time, the heated lubricating oil will be discharged through the oil outlet 10c' to take away the heat. There is sliding friction between them, especially as the diameter of the outer rotor 5' increases or the speed of the main shaft increases, coupled with a large change in the support force, it is easy to damage the lubricating oil film, resulting in direct metal sliding between the outer rotor 4' and the cylinder friction, which increases the frictional power consumption of the compressor, and even causes the inner and outer rotors to fail or even be damaged, thus making the entire compressor scrapped

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