Thrust bearing and air suspension centrifugal compressor

Abstract

The invention discloses a thrust bearing and an air suspension centrifugal compressor, relates to the field of compressors, and aims to optimize the structure of the thrust bearing. The thrust bearing comprises a first seat body, a second seat body and a graphite piece. The first seat body comprises a first through hole. The second seat body comprises a base plate fixedly connected with a bearing seat and a bearing bush connected with the base plate through a connecting part. The base plate is provided with a second through hole communicated with the first through hole. The connecting part is configured to enable the bearing bush to move relative to the base plate under the action of external force. The graphite piece is installed on one side of the bearing bush away from the base plate. According to the thrust bearing provided by the technical scheme, due to the connection between the bearing bush and the base plate, the bearing bush cannot be separated from the base plate, and the bearing bush can incline to a certain degree relative to the base plate when being stressed in the working process of the thrust bearing, so that the damping of the thrust bearing can be adjusted, and the working requirement of the thrust bearing is met.

Description

technical field [0001] The invention relates to the field of compressors, in particular to a thrust bearing and an air suspension centrifugal compressor. Background technique [0002] A centrifugal compressor is an air-conditioning compressor that uses high-speed impeller rotation to generate centrifugal force for gas compression. At present, the conventional types include fixed frequency, frequency conversion, magnetic suspension, and air suspension centrifugal compressors. Among them, the air suspension centrifugal compressor has the advantages of simple structure, no oil, no friction, and low cost, and it will become the development of centrifugal compressors in the future. trend. [0003] Since the centrifugal compressor is a kind of equipment for compressing refrigerant, the force on both ends of the rotor is not the same, so the rotor will inevitably move forward or backward. At this time, it is necessary to arrange a The thrust bearing is used to balance the forward...

AI Technical Summary

Problems solved by technology

[0007] The inventors found that most of the commonly used porous static pressure gas bearings currently adopt a single oil wedge structure, the gap between the thrust disc and the thrust bearing is small (0.01mm-0.02mm), and the wedge angle between the two is generally small , so the dynamic pressure effect produced is weak

Moreover, under high-speed working conditions, the gas in the bearing gap is compressed and squeezed out of the bearing rotor system, and the kinematic viscosity of the gas film decreases, resulting in a decrease in the damping coefficient of the bearing and a decrease in damping, so the shock absorption of the bearing will be greatly reduced , at this time the thrust disc is easy to rub against the bearing

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