DOI: 10.11799/ce202602023
Teeth surface wear law and vibration characteristics of helical gears in mining exciters
CHENG Xiaohan
CAO Congjie
FAN Kaifeng
CHEN Zhijie
LIU Yongjia
CHANG Chenrui
ZHOU Qilong
Abstract：To address the issue that teeth surface wear in helical gears of mining vibrating screen exciters severely compromises the coal washing process,a dynamic numerical simulation model of the exciter helical gear-rotor coupling system was established.The time-varying meshing force of the gear pair was obtained using the fourth-order Runge-Kutta method.Based on the characteristics of mixed elastohydrodynamic lubrication(EHL),the dynamic evolution of the time-varying wear coefficient,roughness load ratio,and oil film deficit coefficient for both driving and driven gears during the meshing process was investigated comparatively.The wear depth of the driving and driven gears under mixed EHL,as well as the post-wear time-varying meshing stiffness and time-varying backlash,were subsequently derived.By integrating these factors,the vibration response of the exciter helical gear system under teeth surface wear fault was obtained,and the vibration response patterns in various directions caused by wear faults were revealed.It was found that,in addition to the enhanced nonlinear vibration of the system,the x-direction,z-direction,and torsional direction are all sensitive to gear wear,which can provide a theoretical basis for fault diagnosis of gear wear in vibrating screen exciters.
Keywords：vibrating screen exciterhelical gear pairweardynamic characteristicsfault diagnosisnonlinear vibration
Publication Date：2026-02-20
Online Publishing Date：2026-03-23(First online date of this platform, not the publication date of the document)
Pages：7( 184-190 )