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本文运用古典的赫兹应力理论和新近发展的弹性润滑油膜理论相结合的方法,对高强化柴油机喷油泵凸轮的疲劳及其寿命进行了讨论。文中给出了柴油机喷射系统的一些结构参数和运行参数对赫兹应力和油膜厚度的影响,指出了尽可能加大当量曲率半径对改善凸轮的疲劳具有重要的意义。高疲劳寿命喷油泵凸轮的设计可以通过计算机辅助设计,在同时兼顾喷射系统的二次喷射、穴蚀、可靠性及发动机的综合性能要求的前提下进行。
In this paper, the classical fatigue theory of Hertz and the newly developed theory of elastic lubricant film are used to discuss the fatigue and life expectancy of high-intensified diesel injection pump cam. The influence of structural parameters and operating parameters on Hertz stress and oil film thickness of diesel engine injection system is presented in this paper. It is pointed out that it is of great significance to increase the equivalent radius of curvature as much as possible to improve the fatigue of the cam. High Fatigue Life The design of the injection pump cam can be computer-aided design while taking into account the secondary injection, cavitation, reliability and engine performance requirements of the injection system.