中文摘要：

引入流体力学的两相流理论、轴流风机和径流风机的动量定理，对单个斜齿轮的搅油功率损失进行了有限元数值估算。考虑流体的黏性、密度，齿轮的螺旋角、模数、齿数、转速，周边工作温度，箱体尺寸，重力加速度和润滑油浸没深度等参数的影响，使用有限元流体力学软件Fluent对多组不同参数斜齿轮的三维搅油流场和搅油功率损失进行了数值仿真。进一步通过实验数据对数值仿真结果的部分参数进行了验证和比对，证明了中低转速条件下可以使用仿真的方法预估搅油功率损失的数值。研究结果也为后续啮合状态下的斜齿轮组搅油功率损失的数值计算提供了方法依据和理论参考。

英文摘要：

The finite element numerical estimation of single helical gear churning power loss was carried on by using two phase flow theory in fluid mechanics and theorem of momentum in axial flow and radial flow wind turbine .Considering the impacts of lubricant density and viscosity ,and the impacts of gear helix angle ,gear mod-ule ,number of teeth ,rotation speed ,and the impacts of the surrounding temperature ,gearbox case size ,accelera-tion of gravity and lubricant immersion depth of gear ,the numerical simulations of churning flow field and power loss were carried on by using finite element software Fluent .In the simulation ,churning flow field of helical gear was three-dimensional flow field ,and there were several gears with different parameters were simulated grouping-ly .And then ,some parameters in the simulation results were validated and compared through experimental data , the results prove that the value of churning power loss can be forecasted by using the simulation method under the conditions of low and medium speeds .At the same time ,the method basis and theoretical reference can be provided for numerical simulation of churning power loss under meshing helical gears .