Exploiting Electrostatic Sensors for Rotational Machinery Shaft Centerline Orbit and Vibration Monitoring

摘要

To realize a more economical measurement of rotational shaft centerline orbit and vibration, a shaft centerline orbit reconstruction method using a specifically designed electrostatic sensor is proposed in this paper. The sensor consists of 3 sensing electrodes, one shaft cover working as charge source, and a cylindrical shield covering the three electrodes. Based on electrostatic induction, the proposed sensor is sensitive with shaft movement so that the shaft centerline displacement and orbit can be reconstructed. The CAE software COMSOL Multiphysics is used for sensor modeling and simulation analysis. Experiment is carried out to test the performance of the proposed method which proves the feasibility of the novel sensor for shaft centerline orbit and vibration monitoring.