材料填充对滤波减速器啮合力与润滑特性的影响

Effects of Fillers in Tooth Slotting on Meshing Force and Lubrication Performance of Filtering Reducer

为提高滤波减速器寿命,设计在齿上开槽,并在槽内填充紫铜、硬铝合金、尼龙1010、丁晴橡胶的新型结构。建立了滤波减速器在不同位置啮合的有限元模型,计算了不同填充材料齿轮在不同啮合位置的啮合力。在此基础上建立了考虑齿面粗糙度的滤波减速器混合润滑模型,分析了转速对不同填充材料滤波减速器润滑特性的影响。有限元模型计算结果表明:材料填充可以增加滤波减速器轮齿啮合对数,有效减小啮合力,齿面最大接触力随着填充材料弹性模量的减小而减小。润滑计算结果表明,材料填充可以增大齿面间平均油膜厚度,有效提高滤波减速器润滑性能。在转速小于1 500 r/min时,通过材料填充可以降低接触面积比,转速大于1 500 r/min时,材料填充对接触面积比的影响不明显;在啮入啮出点时,转速大于1 500 r/min时,材料填充可以降低滤波减速器齿面最大接触应力,转速小于1 500 r/min时,最大接触应力随填充材料弹性模量的变化规律不明显;节点啮合时,丁晴橡胶和尼龙1010可以显著降低齿面最大接触应力。

In order to improve the life of filtering reducer, a new structure is designed that gear tooth is slotted and tooth slotting is filled with red copper, hard aluminum alloys, nylon-1010 and uitrile rubber. Reducer finite element model （FEM） in different meshing loca- tions is established based on a meshing model of planetary transmission with small tooth number difference, by which the meshing force in different engaging position is calculated. A mixed lubrication model is established by considering the roughness of tooth surface to cal- culate the lubrication status with different rotation speeds. The results of FEM analysis show that filler materials can increase the number of meshing pairs and decrease the meshing fore significantly. And maximum contact force decreases with the reduction of elastic modulus of filler materials. Lubrication calculation results show that filler materials can improve the lubrication performance effectively. Filler materials can increase the average film thickness in contact interface. The contact area ration is decreased by filler material when rota- ting speed is less than 1 500 r/min, as rotating speed exceeds 1 500 r/min,the decrease is not obvious. When speed is more than 1 500 r/min, Filler materials can reduce the maximum contact stress in engage-in and engage-out point, however,the Variation of maximum contact stress is irregular with the variation of the elastic modulus. In pitch point, nylon - 1010 and nitrile rubber reduce the maximum contact stress significantly.