CB型动平衡机主轴自由振动及应力仿真分析.doc

CB-1200型动平衡机主轴自由振动及应力仿真分析 重庆大学士学位论文 指导教师：王秋晓 副教授 专　　业：机械制造及其自动化 学科门类：工 学 重庆大学学院 二O年月pindle Free Vibration and Stress Simulation Analysis of CB-1200 type Dynamic Balancing Machine A Thesis Submitted to Chongqing University in Partial Fulfillment of the Requirement for the Degree of Master of Engineering by Ou ruchun Supervised：Prof. Wang Qiuxiao Major：Mechanical Manufacture and Automation College of Mechanical Engineering of Chongqing University , Chongqing, China April 2011 摘 要 平衡机是测量旋转物体(转子)不平衡量大小和位置的机器。转子在围绕其轴线旋转时，由于相对于轴线的质量分布不均匀而产生离心力。这种不平衡离心力作用在转子轴承上会引起振动，产生噪声和加速轴承磨损，以致严重影响产品的性能和寿命。根据平衡机测出的数据对转子的不平衡量进行校正，可改善转子相对于轴线的质量分布，使转子旋转时产生的振动或作用于轴承上的振动力减少到允许的范围之内。CB-1200动平衡机主轴进行计算分析CB-1200动平衡机主轴进行对平衡机主轴进行自由振动模态的分析，得到精确的固有频率及振型。  ABSTRACT Dynamic balancing machine is a kind of machine for measuring the phrase and quality of rotors. When a rotor rotates around its axis, centrifugal force is produced because of uneven distribution of the quality around the axis. When the unbalancing centrifugal force transmit to the bearings, it will cause vibration and noise, which will accelerate the speed of wearing of the bearings. As a result of that, the longevity and performance of the products will be seriously decreased. Based on the data measured by the balance machine, we can amend the unbalance quality of rotors balancing, by which the distribution of the quality around the axis can be optimized. So the vibration of rotors or the vibrating forces exert on the bearings can be reduced to the permitted range. Balancing machines spindle is the main parts of balancing machines. The design of spindle is directly related to the performance of balance machine, so the calculation and analysis of the spindle is very necessary. In the paper we take the engineering application as a background, using the finite element analysis software to simulate and analyze the CB 1200 dynamic balancing machine’s spindle. The research content is as follows:. Through to CB - 1200 dynamic