【摘要】 采用动力学与静力学相结合的方法研究了端面弧齿工作时的动态应力,首先对端面弧齿接触区采用等效抗弯刚度模型,连续区采用传统模型进行转子动力学分析,再将动力学分析结果作为位移边界条件施加于静力学分析模型,研究端面弧齿的动应力变化规律。结果表明:端面弧齿的承扭能力与压力角有关,压力角越大,承扭能力越强,但压力角不宜过大,否则将降低传递效率;离心力作用下,不同位置端面弧齿应力在圆周上呈周期性波动,处于拉杆位置的端面弧齿齿面应力较小,处于中间位置的端面弧齿齿面应力较大,而齿根的应力波动与齿面相反;扭矩力作用下,端面弧齿承扭侧与非承扭侧产生了明显的应力差;弯曲力会破坏转子的周期对称性,由于转子轴心轨迹为椭圆,端面弧齿旋转一周将发生2次应力交变。更多还原

【Abstract】 Combining dynamic analysis with static analysis,the dynamic stress of curvic couplings was studied in the process of working condition.First,a dynamic analysis of rotor was carried out by adopting equivalent bending stiffness model and traditional stiffness model for the contact area and the continuous region respectively.The dynamic analysis results were then taken as the displacement boundary conditions of static analysis to study the dynamic stress of curvic couplings.Results show that the bearing capacity of curvic couplings is correlated with the pressure angle,the greater the pressure angle is,the higher the bearing capacity would be.However,the pressure angle can’t be too large,otherwise,the transmission efficiency would be reduced.Under the action of centrifugal force,the dynamic stress of curvic couplings changes periodically in hoop direction at different positions.The stress on teeth surface is small at bolt position,which is large at middle position,whereas the variation tendency of stress on teeth root is contrary to that on teeth surface.Under the action of torque,an obvious stress difference exists between the bearing side and non-bearing side.The rotor is no longer a cyclic symmetric structure under the action of bending force,as the running orbit of the rotor is an ellipse,and the stress distribution of the curvic teeth alters two times in a round.更多还原