Dynamic characteristics of parallel shaft gearbox with tooth root crack failure

REN Xue-ping, WU Hai-feng
(School of Mechanical Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, China)

Abstract: Aiming at the gear crack failure in parallel shaft gearbox, the meshing stiffness, torsional vibration model, rigidflexible coupling model, gear meshing force, box input shaft node angular acceleration and corresponding spectrum were studied from the perspective of dynamics. With root crack of gear box of torsional vibration and the dynamic analysis of the joint simulation, a kind of Bartelmus torsional vibration model and the coupled dynamic analysis method were put forward. Using ADAMS and ANSYS to establish case and take root crack of gear as the main research object, the gear box of the coupled model was obtained by simulation health and tooth root crack fault of tooth contact force and Angle acceleration response. Extraction box input shaft end node 1 s in vertical direction of the acceleration signal, import transmission system dynamics equation in the vertical direction of the target gear acceleration spectrum was calculated, and through the experimental verification. The results show that this method can well simulate the time-domain and frequency-domain response of acceleration at the input shaft of gear box with root crack, and the dynamic response to root crack fault is accurate and reliable.
Key words: tooth root crack; meshing stiffness; meshing force; angular acceleration; rigid-flexible coupling; frequency spectrum analysis