A novel method for frictional power losses of a gear meshing was presented according to the basic theory of power and energy of the system. It was provided that the relative sliding of two disks existed during the disks rotating, frictional power losses will be caused by the frictional torque for each disk. Based on the above principle, the model for the friction power loss of the gears meshing was built. The frictional coefficient plays important role to the frictional power loss of gears and the time-varying coefficient was analyzed. Based on the system frictional power loss of the gears, the time-varying frictional power loss was calculated. The results indicate that the power loss in the double tooth meshing plays significantly role in the whole power losses. Finally, the results obtained from the new method were compared to the test results by Velex and it is shown that the model of frictional power loss is feasible.

frictional power loss, principle of power and energy;gear;frictional disk

根据系统功能基本原理,提出了一种新的齿轮啮合过程摩擦功耗计算方法。假设两圆盘在滚动过程中存在相对滑动,圆盘间摩擦力矩将对圆盘做功而产生摩擦功耗。据此原理,建立了齿轮啮合过程的摩擦功耗计算模型。在对齿轮啮合过程中摩擦因数分析的基础上,对外啮合齿轮摩擦功耗进行了分析计算。计算结果表明,齿轮在啮合过程中,双齿啮合区的摩擦功耗起主导作用。将计算结果与Velex的试验结果对比显示,提出的齿轮啮合过程摩擦功耗的计算模型是可行的。