In-place measuring device and measuring method for separated electricity jumpiness of main shaft rotation error

Abstract

The invention provides an in-place measuring device and an in-place measuring method for electricity jumpiness of a main shaft rotation error. A laser displacement sensor, a first electrical vertex sensor and a second electrical vertex sensor are arranged outside a measured axisymmetric body, the first electrical vertex sensor, the second electrical vertex sensor and the laser displacement sensor arranged on the same circle, and the circle and the measure axisymmetric body are coaxial. An angle sensor is arranged in an axial position of the second electrical vertex sensor in a close mode. All the sensors are connected with a control module, the control module outputs a signal to an acquisition module, and the acquisition module is then connected with a host machine. According to the in-place measuring method for the electricity jumpiness of the main shaft rotation error, all the sensors are enabled to be in proper positions through regulating devices, when the axisymmetric body is measured, the axisymmetric body rotates, the rotating speed stays the same, measurement parameters are set in measuring software, the sensors start measurement and data acquisition, a computer analyzes and treats the data which are transmitted in, finally, measurement and treatment results are output.

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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