齿轮系统振动加剧齿轮磨损毁坏的机理分析

通过齿轮系统的振动运动分析，论证了不计系统振动和考虑系统振动时存在于啮合轮齿齿面间的相对滑动运动，揭示了系统振动加剧齿面磨损毁坏的机理。由于系统振动的原因，齿轮副的实际中心线和理论啮合线是以平面运动方式变化的，实际啮合点的轨迹是一条曲线，啮合点在齿高某些部位（一般是齿高中部）是以进两步退一步的往复运动方式向前移动的。啮合点的这种前进与后退的交替移动，一方面很容易破坏啮合齿面间的润滑油膜，使摩擦增大，另一方面大大增加了冲击作用，使载荷峰值大大增加，同时啮合齿面间的相对滑动距离也大大增加了。这几方面的综合效应必然导致相啮合齿面间发生剧烈滑动磨擦，从而引起齿面的过早磨损。

Mechanism Research on Gear Abrasion Failure Caused by the Vibration of the Gear System

By analyzing the vibration movement of the gear system,the relative-slide movement between the meshing gear surfaces with or without considering the systemic vibration is demonstrated;the abrasion failure mechanism of the gear due to the vibration of the gear system is revealed.It is pointed out that the theoretic meshing line and the practice center line of the meshed gears is vary with the plane motion,and the locus of practice meshing point is not a line but a curve because of the vibration.It is also pointed out that the vibration have the meshing point on the partial of gear surface(generally,the middle of the surface) moved with reciprocation of two foot ahead and one foot back.It's this reciprocation of meshing point that damages oil membrane and increases the shock,the relative-slide and the rub between the meshing gear surfaces.All of this result in intense slide frictions between the meshing gear surfaces,and therefore cause worn early.