Small micro centrifugal compressor without radial bearing

Abstract

The invention discloses a small micro centrifugal compressor without a radial bearing, and relates to the technical field of compressor design. The small micro centrifugal compressor comprises a shell, an air circulation hole communicated with an exhaust port of the shell is formed in a main shaft, a cavity is formed between a first axial static ring and the inner bottom of the shell, at least twocircles of an air holes A are formed in the circumference of the first axial static ring, a first movable ring is fixedly arranged on the main shaft, a rotating sleeve is fixedly arranged on the outer surface of a rotor, and a fixed sleeve is fixedly arranged on the inner surface of a stator; and a second movable ring is fixedly arranged on the main shaft, a second axial static ring is fixedly arranged in the shell, and the air inlet port and the air outlet port of the centrifugal impeller and the air inlet port and the air outlet port of the shell are oppositely arranged. The small micro centrifugal compressor has the beneficial effects that radial and axial thrust bearings do not need to be installed, the compressor is completely oil-free, and a lubricating system is not needed, so thatthe structure of the compressor is simpler and more compact, miniaturization of the compressor is facilitated, heat generated in the working process of the motor is taken away by the airflow circulating channel, and the effect of internal circulation cooling is achieved.

Description

technical field [0001] The invention relates to the technical field of compressor design, in particular to a small and micro centrifugal compressor without radial bearings. Background technique [0002] With the development of electronic technologies such as integrated circuits, the heat flux density of modern high heat flux devices is increasing. Passive cooling methods cannot meet the heat dissipation requirements. A refrigeration system is required to ensure the normal operation of the electronic system. In many occasions such as mobile or portable electronic systems, chip cooling, radar cooling, and national defense and military industries, due to space and weight constraints, there is an urgent need for lightweight, small and micro refrigeration systems. [0003] The compressor is the core key equipment of the refrigeration system. As a rotary turbomachinery, the centrifugal compressor has the advantages of compact and simple structure, high efficiency and reliability, ...

AI Technical Summary

Problems solved by technology

However, centrifugal compressors can only be miniaturized through high speed. At present, the existing magnetic suspension bearings, gas bearings and sealing technologies cannot achieve ultra-high-speed miniaturization of centrifugal compressors.

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