基于负载与啮合特征的WN齿轮传动接触强度分析

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为了探求WN齿轮传动的强度机理和失效原因，依据WN齿轮负载传动时齿面的三维几何接触特征和弹性变形理论建立了接触强度分析模型，提出了基于WN齿轮啮合特征的接触强度分析方法．根据啮合过程中齿面接触载荷、啮合齿轮副和接触点数的变化，利用有限元分析进行了各种状况下的齿面接触应力计算，明确了WN齿轮接触强度设计中的螺旋角、中心距误差、齿宽及重合度对最大接触应力的影响结果．研究发现，当中心距和重合度及螺旋角等变化时，WN齿轮与渐开线齿轮呈现出了完全不同的载荷特征和强度机理． In order to discuss strength mechanism and failure causes of WN（Wildhaber-Novikov） gear transmission, the analysis model of contact strength in loading transmission was established based on three dimensional geometric contact feature and elastic deform of meshing tooth face. The study presented a method on the contact strength analysis of WN gear based on meshing feature. The tooth face contact stress of WN gear with various situations was calculated by FEM analysis and based on changing of contacting load, meshing points and gear pairs. The affectation result relations between the maximum contact stress and effects of helix angle, center distance error, face width and overlap ratio were carried out on the strength design of this gear. It is discovered that the loading feature and strength mechanism of WN gears and involute gears are completely different when the center distance and overlap ratio and helix angle were changed.