歯車試験による混合潤滑領域での歯面摩擦係数の評価

抄録

The drive motors of electric vehicles are becoming smaller and faster in order to improve the electricity consumption. However, there are many unknowns in the tooth friction coefficient in the fluid lubrication area, where the oil film becomes thicker due to high-speed rotation. High-speed operation of the testing machine is also necessary for this evaluation, but there are difficulties such as dynamic loading. Therefore, this study attempts to increase the oil film thickness by increasing the pressure angle of the test gear. In addition, the roughness of the tooth surface is reduced by mirror polishing. The objective of this study is to evaluate the tooth friction coefficient over a wide lubrication range using these test gears.