Abstract:Churning loss is an important part of the immersion gearbox power loss. It is important to establish a churning loss model for the gear system. In this paper, on the basis of considering the geometric parameters of gears, the viscosity of lubricating oil, the wetting area of gears, the flow state of oil and other factors, and comprehensively considering the viscosity and temperature characteristics of lubricating oil and the influence of dynamic liquid level, a multi-field coupling analysis method for gear oil churning loss is proposed, and a calculation model of oil agitation loss based on velocity field and temperature field coupling is established. Computational fluid dynamics (CFD) simulation is used to verify the theoretical model, and the results show that the calculation model considering the dynamic liquid level plane is more consistent with the simulation results when the rotation speed is greater than 1600r/min, and the error is within 4.66%.