齿轮疲劳裂纹萌生与扩展行为研究现状

Research Status of Initiation and Expansion Behavior of Gear Fatigue Cracks

齿轮传动的综合效率直接制约着交通、建筑、风电等领域的发展质量,因此,对齿轮传动功率、负载能力以及预期寿命等的要求在逐步提高;然而,齿轮疲劳失效极大地限制了现代齿轮设备的性能与可靠性。综合论述了齿轮疲劳裂纹萌生与扩展行为现状,对齿轮失效的主要形式和原因进行介绍;归纳了影响齿轮疲劳强度的因素,总结了齿轮裂纹3种类型以及裂纹萌生与扩展的原因和方法;归纳了现有的齿轮疲劳裂纹模拟方法,描述了齿轮疲劳中的微结构力学行为,以提高对齿轮疲劳的特征和机制的理解;分析了在齿轮疲劳试验下的剩余使用寿命,并对如何避免齿轮裂纹产生提出了一些建议。

The comprehensive efficiency of the gear transmission directly restricts the development quality of transportation,construction,wind power and other fields,and the requirements of gear transmission power,load capacity and life expectancy improve gradually.However,the fatigue failure of gear greatly limits the performance and reliability of modern gear equipment.The present situation of fatigue crack initiation and propagation of gear is discussed comprehensively,and the main forms and causes of the gear failure are introduced.This research induces the factors affecting the fatigue strength of gears,summarizes three types of gear cracks,the crack initiation and extension method,and the existing gear fatigue crack simulation method.It is used to describe the microstructure mechanical behavior of gear fatigue,improve the understanding of the related characteristics and mechanism of gear fatigue,and study and analyze the remaining service life of gear fatigue tests.Finally,some suggestions on how to avoid gear cracks are put forward.