7-圆柱齿轮公差与检测.ppt

-2 传动工作平稳性的检测项目 The inspection items of driving work stability 一齿切向综合偏差 f i′ Tooth tangential and general deviation 一齿径向综合偏差 f i〞 Tooth radical and general deviation 齿廓偏差 Tooth profile deviation 基圆齿距偏差 fpb Base circle pitch deviation 单个齿距偏差 fpt Single pitch deviation -3 载荷分布均匀性的检测项目 The inspection items of load distribution’s homogeneity 螺旋线偏差：在端面基圆切线方向上测得的实际螺旋线偏离设计螺旋线的量 Helix deviation:The tested amount that actual helix deviates from designed helix on the tangential direction of end face base circle. （1） 螺旋线总偏差Fβ 在计值范围内，包容实际螺旋线迹线的两条设计螺旋线迹线间的距离Helix total deviation Fβ Within the range of values,the distances between two designed helix path lines which include helix path lines. （2） 螺旋线形状偏差 ffβ 在计值范围内，包容实际螺旋线迹线的两条与平均螺旋线迹线完全相同曲线间的距离 Helix shape deviation ffβ Within the range of values,the distances between two curves which are same as average helix path lines and including actual helix path lines. （3） 螺旋线倾斜偏差fhβ 在计值范围的两端与平均螺旋迹线相交的设计螺旋线迹线间的距离 Helix incline deviation fhβ Within the range of values,the distances between designed helix path lines that both ends are intersectant with average helix path lines. -4 影响侧隙的单个齿轮因素 Single gear factors that influence sideshakes 1 齿厚偏差fSnTooth thickness deviation齿厚的上偏差（ESnS）The upper deviation of tooth thickness 下偏差（ESni）Lower deviation 一般都为负值 Commonly to be negative value 2 公法线长度偏差 Base tangent length deviation 7.4 齿轮副评定指标 The evaluation indexes of gear pairs 1 轴线的平行度误差 The parallelism errors of axes 2 中心距偏差 The deviations of centre-to-centre separations 3 接触斑点 Contact spot 4 齿轮副的侧隙 The sideshake of gear pair 4 齿轮副侧隙 The sideshake of gear pair 齿轮副的最小极限侧隙应根据齿轮工作时的温度和润滑条件确定，与齿轮的精度等级无关。The minimum limit sideshake of gear pair should be ascertained by gear’s working temperature and lubrication condition.It has nothing to do with the gear’s accuracy class. 高温工作的传动齿轮，为保证正常润滑，避免发热卡死，要求有较大的侧隙；There should be biggish sideshake for drive gear working in high