ISO与AGMA渐开线圆柱齿轮强度计算标准的比较

Comparison between ISO and AGMA Gear Strength Rating Methods for Involute Cylindrical Gears

分析和比较了国际标准化组织(ISO)标准与美国齿轮制造者协会(AGMA)标准关于渐开线圆柱齿轮强度计算方法的差异,采用分类比较和实例对比的方法分析了两种标准的修正系数在含义和取值上的差异,以及齿轮的参数和修正系数对齿轮强度计算结果的影响。研究结果表明,两种标准的计算结果不存在其中一种比另一种更为保守的关系;AGMA标准的弯曲强度计算结果对齿轮的几何参数的变化更为敏感;参数和修正系数的取值不同是导致两种标准的计算结果产生差异的原因,其中疲劳极限、载荷、几何参数和寿命对接触强度计算结果的影响较大;试验齿轮的应力修正系数、载荷和几何参数对弯曲强度计算结果的影响较大。

Comparative analysis of involute cylindrical gear strength rating methods used by ISO standard and AGMA standard was conducted.Gear parameters and derating factors were classified.Differences between the meaning and selection of gear parameters and derating factors,as well as their effects on gear rating results,were analyzed through calculations.The study indicates that neither of the two standards is more conservative than the other one,and the bending strength rating results of AGMA standard are more sensitive to the change of gear geometry parameters.The study also indicates that different values of parameters and derating factors cause the differences in gear rating results of the two standards.The allowable stress number,load,geometry parameters and life have the most significant effects on pitting resistance rating results;while the stress correction factor relevant to the test gears,load and geometry parameters have the most significant effect on bending strength rating results.