变轨距轮对中轴套式花键副接触特性及修形研究

Research on the contact characteristics and modification of axle sleeve type spline pair of gauge-changeable wheelset

针对速度400 km/h的1435/1520 mm变轨距转向架轮轴结构中的轴套式花键副接触问题,文章基于ABAQUS软件研究了其在不同轨距和不同不对中角度下的接触压力分布情况,研究了鼓形修形与齿顶倒圆对花键副齿面接触压力分布的影响。计算结果表明,花键副齿面最大接触压力随着不对中角度的增大而增大,并且宽轨时的接触压力比运行于标准轨时大;当存在角向不对中时,鼓形修形使得花键最大接触压力显著减小,随着修鼓量的增大,花键对角向不对中的补偿能力越强;修鼓后的轴套式花键副存在一个不对中角度区间使得运行于宽轨时的花键副最大接触压力比运行于标准轨时小,而且角度区间随着修鼓量的增大而增大;鼓形轴套式花键副经齿顶倒圆后,齿廓方向的边缘效应有所改善,使得最大接触压力进一步降低。

Regarding the contact problem of axle sleeve type spline pair in the wheel axle structure of 1435 mm/1520 mm gaugechangeable bogie with a speed of 400 kilometers per hour,the contact pressure distribution was studied under different gauge and misalignment angles,and the influence of crowned modification and gear tip rounding on the contact pressure distribution on the tooth surface of spline pair was studied in the paper with ABAQUS software.The calculation results show that:the maximum contact pressure on the tooth surface of the spline pair increases with the increase of misalignment angle,and the contact pressure on the broad gauge is greater than that on the standard gauge;when there is angular misalignment,crowned modification significantly reduces the maximum contact pressure of the spline,as the amount of modification quantity increases,the compensation ability of the spline for angular misalignment becomes stronger;the crowned shaped axle sleeve type spline pair has an misalignment angle range,which causes the maximum contact pressure of the spline pair to be smaller on the broad gauge than on the standard gauge,and the angle range increases as the amount of modification quantity increases;the edge effects in the direction of tooth profile is improved after the crowned shaped axle sleeve type spline pair is rounded at the gear top,further reducing the maximum contact pressure.