Study on Parametric Modeling Method of Modified Tapered Roller Bearing
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摘要: 为了提高修形圆锥滚子轴承三维模型的创建效率，提出了一种基于ADAMS二次开发的参数化建模方法。通过对修形圆锥滚子进行区域划分，降低了修形滚子数学模型的构建难度，并在ADAMS/VIEW中编写建模宏命令创建修形圆锥滚子轴承三维模型，极大的缩短了建模所需时间。此外通过实例分析，分别将使用该方法和使用Creo创建的轴承三维模型导入ABAQUS，分析其在不同工况下的滚子-滚道接触应力分布。结果表明两类模型的接触应力分布曲线间的平均相对误差均小于1.8%，验证了该方法的准确性。Abstract: In order to improve the efficiency of creating three-dimensional model for modified tapered roller bearing, a parametric modeling method based on ADAMS secondary development is proposed. The difficulty of constructing the model for the modified roller is reduced by dividing the modified tapered roller into several parts, and wrote modeling macro commands in ADAMS/VIEW to create three-dimensional model for modified tapered roller bearing, which greatly shorten the modeling time. In addition, through case analysis, the 3D bearing model created by the present method and Creowas importedinto ABAQUS respectively, and the roller-raceway contact stress with those models under different working conditionswere analyzed. The results show that the average relative error between the contact stress distribution curves of two kinds models is below 1.8%, the accuracy with the present methodwas verified.
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Key words:
- roller modification /
- parametric modeling /
- mathematical model /
- secondary development
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表 1 圆锥滚子轴承内外圈主参数
物理意义 参数 物理意义 参数 外圈宽/mm Lw 内圈小径/mm Dn3 外圈大径/mm Dw1 内圈大端面大径/mm Dn1 外圈小径/mm Dw2 内圈小端面大径/mm Dn2 外圈倾角/（°） αw 大挡边与内滚道间
夹角/（°）θ 轴承总宽/mm Lz 内圈宽/mm Ln 内圈大端面宽/mm Ln1 内圈倾角/（°） αn 内圈小端面宽/mm Ln2 
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表 4 圆锥滚子轴承保持架主参数
物理意义 参数 物理意义 参数 保持架全长/mm Lj 保持架倾角/（°） αj1 保持架大径/mm Dj1 引导挡边倾角/（°） αj2 保持架小径/mm Dj2 兜孔轴向间隙/mm Ld1 保持架厚度/mm Hj 兜孔径向间隙/mm Ld2
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表 5 主要操作指令及功能
元件名称 主要操作指令 实现功能 内、外圈 Part create、Revolution create等 实体创建、旋转体创建等 修形滚子 Part create、Revolution create、Frustum create、Sphere create、Cylinder create、
Spline create、Matrix create、Boolean Intersection、Boolean unite、Object copy等实体创建、旋转体创建、圆台体创建、球创建、圆柱创建、样条曲线创建、矩阵创建、布尔与、布尔加、复制对象等 保持架 Part create、Revolution create、Frustum create、Object copy、Boolean cut等 实体创建、旋转体创建、圆台体创建、布尔减等
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表 6 两类模型的接触应力分布平均相对误差值
载荷F/kN 最大修形量δ/μm 平均相对误差γ/% 圆弧修形 对数修形 5 25.5600 0.178 1.078 5 10.4560 0.225 1.105 5 4.1245 0.621 1.645 10 25.5600 0.295 0.540 10 10.4560 0.197 1.677 10 4.1245 0.395 1.753
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