旋转盘形齿轮曾因横向振动而多次出现过断裂故障。本文建立了盘形齿轮横向振动的微分方程 ,分别用数值分析和试验研究的方法对盘形齿轮的横向振动进行了研究 ,提出了齿轮行波自激振动的概念 ,比较贴切地解释了盘形齿轮的断裂故障 Rotary disc gear has repeatedly appeared due to lateral vibration failure fault. In this paper, the differential equations of the transverse vibration of the disc gear are established. The transverse vibration of the disc gear is studied by means of numerical analysis and experimental research. The concept of self-excited vibration of the gear traveling wave is proposed. The disc shape Broken gear fault