Measuring method of bearing center error

Abstract

The invention relates to a method for measuring the center error of a bearing, which is characterized in that it comprises: the steps of arranging both sides of a rotating shaft on the inner peripheral surfaces of a magnetic bearing and a spare bearing; applying a current to the magnetic bearing to make the rotating shaft a step of producing a motion of the shaft; a step of determining a contact point of the rotary shaft and the backup bearing following the motion of the rotary shaft; Position information, the step of determining the final target value; the step of determining the magnetic center of the magnetic bearing through the final target value; comparing the magnetic center of the magnetic bearing with the mechanical center of the backup bearing to determine the center error steps; and a step of aligning the magnetic center of the magnetic bearing with the mechanical center of the spare bearing based on the determined center error.

Description

technical field [0001] The invention relates to a method for measuring the center error of a bearing. Background technique [0002] Generally, an air conditioner is a machine that cools or heats an indoor space. The air conditioner includes: a compressor for compressing refrigerant; a condenser for condensing refrigerant discharged from the compressor; expansion of the refrigerant; and an evaporator for evaporating the refrigerant expanded in the expander. [0003] The turbo refrigerator includes a compressor that sucks low-pressure refrigerant and compresses it into high-pressure refrigerant, a condenser, an expansion valve, and an evaporator, thereby being able to drive a refrigeration cycle. [0004] The turbo refrigerator includes a centrifugal turbo compressor (hereinafter referred to as a turbo compressor). The turbo compressor converts kinetic energy generated by a driving motor into static energy while discharging gas in a high-pressure state, and may include: one...

AI Technical Summary

Problems solved by technology

[0014] First, there is the problem of additionally requiring a machine called a levitation controller for measuring center errors

In particular, there is a problem that the center error cannot be measured without separately preparing a suspension controller

[0015] Second, when using a levitation controller, there is a problem that the measurement can only be performed when the magnetic bearing and the backup bearing are both set on the rotating shaft

That is, the center error can only be measured when the magnetic bearing, the rotating shaft, and the backup bearing are all in motion. Therefore, there is a problem that it is actually only possible to identify whether the manufactured product is defective, but it is impossible to disassemble the product and reassemble it.

Namely, there is the problem that the center error can only be measured after the assembly step

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