考虑安装误差的弧齿锥齿轮凹凸齿面印痕修正

Correction of Concave and Convex Tooth Surface Patterns of Spiral Bevel Gears Considering Installation Errors

弧齿锥齿轮作为重型燃气轮机中关键的动力传动部件,其双向传动的运行特点对齿轮凹凸齿面的接触印痕提出了更高的质量要求。为了满足实际需求,通过建立齿面啮合模型,利用考虑安装误差的齿轮接触分析(error tooth contact analysis, ETCA)技术研究了一对弧齿锥齿轮凹面和凸面均为工作面时,接触印痕随安装误差变化的数值规律。同时,以齿面印痕的中点位置、长轴倾角和面积作为印痕参数化处理后的特征值,优化齿轮安装误差调整值,修正印痕的不合理之处,实现凹凸齿面印痕的一致性和重叠性。滚检实验验证了模拟印痕的准确性,该修正规律可以为弧齿锥齿轮副的安装调整提供理论依据。

As a key power transmission component in heavy duty gas turbines,the bi-directional operation of the spiral bevel gears places higher quality requirements of the contact patterns on the concave and convex surfaces of the gears.In order to meet the practical requirements,a tooth meshing model is developed and the numerical law of contact marks with installation error is investigated using the error tooth contact analysis(ETCA)technique,which takes into account the installation error when both concave and convex surfaces of a pair of spiral bevel gears are working surfaces.Meanwhile,the midpoint position,long axis inclination and area of the tooth face marks are used as the characteristic values of the marks after parameterisation to optimise the gear installation error adjustment values,correct the unreasonable marks and achieve the consistency and overlap of the concave and convex marks.The accuracy of the simulated marks is verified by the rolling test,and the correction law can provide a theoretical basis for the installation adjustment of spiral bevel gear pairs.