摘要
Mass imbalance-induced vibration affects the rotating machinery very large,especially the highspeed types.Off-line balancing techniques have been widely developed for rejecting unbalance-induced vibration but do not eliminate unbalanced vibration in the working state.Moreover,multiple start-stops are required in off-line balancing techniques.Therefore,research on an efficient electromagnetically-driven auto-balancer is carried out in the present work,and an internal excitation actuator is designed in this balancer.The electromagnetic characteristics of the two copper coil bobbins in the internal excitation actuator are compared and analyzed.The permanent magnets inside the actuator are simulated and analyzed with different sections of round,rectangular,and elliptical.And the results show that the elliptic type has the largest self-locking force.Finally,the dynamic balance test is performed on a test bench equipped with a designed electromagnetic balancing actuator,and the unbalance vibration is reduced from 130.23 μm to 5.98 μm.
作者
李兆举
Chen Lifang
Zhou Bo
Yan Ziwen
Zhou Shuhua
Li Zhaoju;Chen Lifang;Zhou Bo;Yan Ziwen;Zhou Shuhua(Key Laboralery of Engine Health Monitoring Control and Nelworking of Ministry of Educalion,Beijing University of Chemical Technology,Bejjing 100029,P.R.China;Beijing Key L.aboratery of Health Monitoring and Self-Recovery for High-End Mechanical FEquipment,Beijing University of Chemical Technology,Beijing 100029,P.R.China)
基金
Supported by the National Natural Suience Foundation of China(No.51775030,91860126).