Electric runout in-situ measuring device and measuring method for separating spindle rotation error

Abstract

An electric runout in-position measurement device for spindle rotation error designed in the present invention is equipped with a laser displacement sensor, a first eddy current sensor and a second eddy current sensor on the outside of the rotating body to be measured, the first eddy current sensor, the second eddy current sensor The eddy current sensor and the laser displacement sensor are arranged on the same circle, and the circle where they are located is coaxial with the measured rotating body, and an angle sensor is arranged close to the axial position of the second eddy current sensor, and all the above sensors are connected with the control The modules are connected, the control module outputs the signal to the acquisition module, and the acquisition module is then connected to the upper machine position. The in-situ measurement method of electric runout of the spindle rotation error, through the adjustment device, makes each sensor in a suitable position; during the measurement, the measured rotary body rotates, and the speed is fixed. Set the measurement parameters in the measurement software, start the sensor to start measurement and data Acquisition, the computer analyzes and processes the transmitted data, and finally outputs the measurement and processing results.

Description

technical field [0001] The invention relates to the technical field of precision in-position measurement, in particular to an electric runout in-position measurement device and a measurement method for separating the rotation error of a main shaft. Background technique [0002] Electrical runout (Electrical Runout, ERO) characterizes the inhomogeneity of the electromagnetic properties of precision rotating parts (such as turbines, generators, internal combustion engines, machine tool spindles, etc., and other large rotors), which affects the vibration and operation reliability of the machine. An important evaluation index of rotor processing quality. The standards API612 and API617 of the American Petroleum Institute set clear limits on runout errors such as electrical runout, and require that the comprehensive runout of the rotor should not exceed 25% of the peak value of the vibration or 6.3μ. Comprehensive runout is the sum of electrical runout and mechanical runout, and...

AI Technical Summary

Problems solved by technology

In the occasion of in-situ measurement of large shaft parts, due to the limitation of structure and installation space, installing too many probes will inevitably lead to difficulty in installation and adjustment

However, in the implementation process of the transposition method, the operation is cumbersome, the measurement period is long, and there are still problems such as harmonic suppression.

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