发布时间 : 星期一 文章轴承本科毕业设计论文更新完毕开始阅读7aed830dff4733687e21af45b307e87100f6f864
河南科技大学毕业设计（论文）
三排滚子转盘轴承承载能力分析和寿命计算
摘 要
多排滚柱式回转支撑，能够承受较大的倾覆力矩，是回转支承中承载能力最大的一种。多排滚柱式回转支承特别适用于承受大载荷、大冲击工况条件下运行的重型机械，而三排滚柱式回转支承是其中最具典型的结构形式，因此对三排滚子转盘轴承的研究具有一定的现实意义和社会效益。
以Hertz接触理论为基础，结合三排滚子转盘轴承的特殊结构，推导出计算三排滚子转盘轴承接触强度校核的有关理论公式，并绘制了静、动承载能力曲线。然后，用Lundberg-Palmgren寿命理论，推导计算三排滚子转盘轴承的疲劳寿命。通过以上的分析计算可为轴承的选型和设计提供理论基础。
通过以上分析推导的公式，建立数值求解模型，用Matlab编程语言进行计算求解，解出三排滚子转盘轴承的最大承受载荷和寿命，进而绘制承载能力曲线。
之后，再用ANSYS有限元，建立简单的模型进行形变和应力的分析。
关 键 词：三排滚子转盘轴承，承载能力，疲劳寿命，经典数值分析，ANSYS有限元分析
I
河南科技大学毕业设计（论文）
CARRYING CAPACITY ANALYSIS AND LIFETIME CALCULATIONS OF THREE-ROW
ROLLER SLEWING BEARINGS
ABSTRACT
In slewing bearings, the multi-row roller slewing bearings has the most load carrying capacity, which can withstand large overturning moment. The multi-row roller slewing bearings is especially suitable for heavy machinery which withstand large loads or impact of working conditions under running. However, three-row roller slewing bearings is one of the most typical form in the structure of multi-row roller slewing bearings. So, it has a certain practical significance and social benefits for studing three-row roller slewing bearings.
It can deduce to the theoretical formula that used to calculating contact strength check of the three-row roller slewing bearings and can draw static and dynamic carrying capacity curves, based on the Hertz contact theory and combined with the special structure of the three-row roller slewing bearings. Then, using the lifetime expectancy theory of Lundberg-Palmgren to derived and calculate the fatigue lifetime of the three-row roller slewing bearings. It can provide a theoretical basis for bearing type selection and design by the above analysis and calculations.
Through the formula which analysis and derive above, we can build the numerical solution model. Computing for Matlab programming language, solve three-row roller slewing bearings maximum load carrying and lifetime, and then draw the carrying capacity curve.
After then, build a simple model by the ANSYS finite element to deformation and stress analysis.
KEY WORDS：three-row roller slewing bearings, carrying capacity, fatigue lifetime, Classical numerical analysis, ANSYS finite element analysis
II
河南科技大学毕业设计（论文）
目 录
前 言 ................................................................................................ 1 第1章 绪论 ...................................................................................... 2 §1.1研究对象 .................................................................................. 2 §1.1.1研究对象及特点 ............................................................... 2 §1.1.2国内外对比 ....................................................................... 3 §1.2研究的意义 ............................................................................... 3 第2章 静承载能力的分析和计算 ................................................... 4 §2.1静承载能力的理论推导 ............................................................. 4 §2.1.1负荷与弹性变形 ............................................................... 4 §2.1.2赫兹弹性理论的基本假设 ................................................ 4 §2.1.3计算公式 ........................................................................... 5 §2.2平衡方程 .................................................................................. 6 §2.2.1静态平衡方程的建立 ....................................................... 6 §2.2.2力平衡方程 ....................................................................... 6 §2.2.3力矩平衡方程 ................................................................... 8 §2.3静承载能力计算分析 ................................................................ 8 §2.3.1计算分析过程 ................................................................... 8 §2.3.2静承载曲线的绘制 ......................................................... 11 第3章 额定寿命和动态承载能力的计算 ...................................... 14 §3.1理论公式的推导...................................................................... 14 §3.1.1额定滚动体负荷计算 ..................................................... 14 §3.1.2当量滚动体负荷计算 ..................................................... 14 §3.1.3单个套圈额定寿命计算 ................................................. 14 §3.2多排滚子的合成寿命计算 ....................................................... 16 §3.3动承载能力曲线的绘制 ........................................................... 16 §3.4动静承载能力合成曲线 ........................................................... 18 第4章 承载能力的有限元分析 ..................................................... 19 §4.1有限元模型的确定 .................................................................. 19
III
河南科技大学毕业设计（论文）
§4.2 承载能力的有限元求解 .......................................................... 19 §4.2.1 求解步骤 ........................................................................ 19 §4.2.2 网格划分过程 ................................................................ 20 §4.2.3 求解和分析 .................................................................... 21 §4.3 求解之后的结论 ..................................................................... 22 结 论 .............................................................................................. 23 参考文献 .......................................................................................... 24 致 谢 .............................................................................................. 26 附 录 .............................................................................................. 27
IV