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...

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