Simulation analysis of tooth break fault of planetary gear transmission system in cutting section of roadheader

Abstract

The cutting section of roadheader is often subject to impact load in the working process, which leads to the frequent failure of cutting reducer with tooth break fault. In order to obtain the dynamic response of planetary gear transmission system under fault condition, a 3-D solid model of the low speed planetary gear system of EBZ120 roadheader cutting section was established by SolidWorks software and the virtual prototype of the system under normal state, ring tooth break fault, planetary gear tooth break fault, and the sungear tooth break fault were built based on ADAMS software. The variation law and spectrum characteristics of the restraint reaction force of ring gear under different states of the system are simulated. The simulation results show that the amplitude fluctuation of the restraint reaction force is significant and has strong periodicity. Under the fault condition, the time-domain mean value of the restraint reaction force of ring gear increases, the time-domain waveform contains obvious periodic impact components, and the fault characteristics with fault frequency as side band appear in the amplitude spectrum.

Keywords

• roadheader
• planetary gear transmission
• tooth break fault
• simulation analysis