Calculation Model of Fatigue Wear-Off in Gear Engagement

The process of fatigue wear-off of tooth face in a closed gear drive system is similar to a layered wear-off mechanism.A mathematical model is thus developed to calculate the friction-fatigue wear-off of tooth face in gearing.The wear rate,teeth slippage during each meshing engagement,rotational speed,time for gearing,number of gear pairs in meshing process and the coefficients of teeth face modification,lubrication and loading are all involved in the expression of worn layer thickness.With the methods given to determine all of the parameters required for the calculation model,what the model is applicable to are discussed.The ways to reduce the fatigue wear-off due to meshing teeth faces under different working conditions are found out via the mathematical model describing the physical process of tooth face wear-off.The model proposed is of technological importance to engineering practice and available to provide reference for simulation of wear-off process of gear engagement.