Zhou Guangwu

Mixed lubrication analysis of modified cycloidal gear used in the RV reducer

Based on the actual working condition of the cycloidal gear on the RV reducer, the maximum normal contact load of gear tooth and mesh tooth pair for varied quantity of plus equidistant modification and minus radial-moving modification were analyzed. By considering the macroscopic geometry, the contact load, and the real tooth surface roughness and transient effect of the contact area between pinwheel and cycloidal gear, a mixed lubrication model was established. The effects of normal load, curvature radius at the meshing point, fillet radius, as well as the speed on the lubrication condition were discussed. The results suggest that load, fillet radius, and speed have different degrees of influence on the lubricating conditions while the change of curvature radius in a small range has no significant effect on the lubrication, which also helps in the optimization of cycloidal gear tooth profile modification, therefore, to obtain better comprehensive performance of RV reducer.

Analysis of mixed lubrication of RV reducer turning arm roller bearing

Purpose The purpose is aimed to solve the lubrication failures in the turning arm bearing of RV reducer, and give some help in perfect the bearing structure design and provide theoretical basis for the reducer’s performance improvement. Design/methodology/approach The paper establishes a mixed lubrication analysis model to study performance parameters. According to the discretization of parameters and iteration of equations, numerical simulation and theoretical analysis are achieved in computational process. Findings Considering influences of contact load, real rough surface and realistic geometry of RV reducer turning arm roller bearing, the mixed lubrication analysis model is established to study the ratio of oil film thickness, pressure distribution, and maximum von Mises stress in different speed, temperature and fillets. The results of mixed lubrication show that reasonable round corner modification, increase of temperature and speed, decrease of surface roughness and lubricant types can improve the ...