The impact of lubricant viscosity to the vibration of gearbox under light load condition

The impact of lubricant to the vibration of gearbox is concerned. Using average equivalent curvature radius and Reynolds equation, the elastohydrodynamic lubrication model for helical gearbox is established. Simulation result shows that the vibration of gearbox increases with the reduction of lubricant viscosity and the lubricant viscosity is lower the impact is bigger. The experimental and simulation results are consistent.