大型低速重载齿轮接触疲劳抗力因素研究

Research on Resistance Factors of Contact Fatigue of Large Gear with Low Speed and Heavy Load

疲劳失效是机械零件非常常见的失效方式之一,数据显示,80%以上机械零件失效归因于疲劳失效。接触疲劳最常见的破坏形式,是齿轮等零件在接触压应力的反复长期作用后所引起的一种表面疲劳剥落损坏现象,特别是矿山机械的低速重载齿轮,大部分失效形式均为齿面接触疲劳失效。本文通过理论依据及实验分析,总结大型低速重载齿轮接触疲劳抗力因素,为保护齿轮表面、提高齿轮寿命提供较为有效的理论依据及保护措施。

Fatigue failure is one of the most common failure modes of mechanical parts.Data show that more than 80%of mechanical parts failure is attributed to fatigue failure.Contact fatigue is a common failure form of fatigue.It is a kind of surface fatigue peeling damage phenomenon caused by the repeated long-term action of contact compressive stress on gear and other parts.Especially for low-speed and heavy-duty gears of mining machinery,most failure forms are contact fatigue on tooth surface.Based on the theoretical basis and experimental analysis,this paper summarizes the contact fatigue resistance factors of large gear with low speed and heavy load,so as to provide more effective theoretical basis and protection measures for protecting gear surface and improving gear life.