双曲线螺伞齿轮失效分析

Failure Analysis of Hyperbolic Spiral Bevel Gear

对20CrNiMo双曲线螺伞齿轮原材料、热处理质量等进行了分析,找出了齿轮早期失效3个主要因素:一是油位过低、失油、缺油、选用润滑油质量不理想;二是轮齿接触区,距齿顶<1 mm,接触区的高度<50%的齿全高,接触区的部位不理想;三是轮齿在啮合运行过程中,如在严重超载、恶劣的路况环境等情况下,会受到较大的接触压力和较大的冲击,巨大的动能转化为热能,使轮齿表面产生高温,导致轮齿早期磨损。

The raw materials and heat treatment quality of 20CrNiMo hyperbolic spiral bevel gears are analyzed.Three main factors for early failure of gears are found.One is low oil level,oil loss,oil shortage,and poor quality of selected lubricating oil.The second is the contact area of the gear teeth,which is less than 1 mm from the top of the tooth,and the height of the contact area is less than 50%of the total height of the tooth,and the contact area is not ideal.The third is that the gear teeth will be exposed to greater contact pressure and greater impact in the course of meshing operation,such as severe overloading,harsh road conditions,etc.The huge kinetic energy is converted into heat energy,which causes high temperature on the surface of the gear teeth,leading to early wear of the gear teeth.