机床齿轮传动系统有限元分析及动力学研究

发布时间：2018-04-14 10:26

本文选题：齿轮传动系统 + 有限元法　；参考：《沈阳工业大学》2012年硕士论文

【摘要】：齿轮是各类机械设备中应用最广泛的传动零件,其工作性能对整个设备都有着至关重要的影响。随着现代工业技术的快速发展,齿轮传动系统传递的功率不断增大,齿轮的转速不断加快,使得对齿轮传动系统的设计、制造及装配都提出了更高的要求。本课题以辽宁省复杂曲面数控制造技术重点实验室设计、生产的数控螺杆铣床铣头内的齿轮传动系统为研究对象,对渐开线直齿圆柱齿轮进行接触分析,得到了齿轮传动系统的综合时变啮合刚度曲线;通过实验确定齿轮系统中三个齿轮的齿廓误差,再用数值仿真的方法得到齿轮传动系统的误差激励曲线。之后将齿轮啮合的刚度激励同误差激励合成,得到整个齿轮传动系统的内部激励;然后对齿轮传动系统模型进行了模态分析和动态响应分析,得到传动系统的固有频率范围及系统两个位置的振动响应曲线。最后通过对铣头的振动测试实验,验证了采用有限元法对齿轮传动系统进行分析的有效性和准确性。本文具体的研究工作主要为,首先建立齿轮啮合的三维有限元模型,对其进行静态接触有限元分析,通过计算轮齿的啮合力及变形,得到齿轮综合时变啮合刚度曲线;然后建立了整个传动系统的有限元模型,对模型进行模态分析,通过提出的一种更加准确计算齿轮装配体模态的方法,得到了齿轮传动系统的固有频率范围及振型;对齿轮传动系统进行动态响应分析,得到了齿轮传动系统的振动速度、振动加速度和振动位移。最后对数控螺杆铣床铣头进行振动检测试验,通过分析频谱中主要的成分确定了齿轮传动系统中主要的振动及噪声来自于齿轮啮合,与动态响应分析结果进行比较,结果基本一致。
[Abstract]:Gear is the most widely used transmission part in all kinds of mechanical equipment, and its working performance has a vital influence on the whole equipment.With the rapid development of modern industrial technology, the transmission power of the gear transmission system is increasing, and the speed of the gear is accelerating, which makes the design, manufacture and assembly of the gear transmission system more demanding.This subject takes the gear transmission system in the milling head of the NC screw milling machine designed and produced by Liaoning Provincial key Laboratory of NC Manufacturing Technology of complex curved Surface as the research object, and carries on the contact analysis to the involute spur gear.The comprehensive time-varying meshing stiffness curve of the gear transmission system is obtained, and the tooth profile error of the three gears in the gear system is determined by experiments, and the error excitation curve of the gear transmission system is obtained by numerical simulation.Then the stiffness excitation of gear meshing is combined with the error excitation, and the internal excitation of the whole gear transmission system is obtained, and then the modal analysis and dynamic response analysis of the gear transmission system model are carried out.The natural frequency range of the transmission system and the vibration response curve of the two positions of the system are obtained.Finally, the validity and accuracy of the finite element method for the analysis of gear transmission system are verified by testing the vibration of the milling head.In this paper, the main research work is as follows: firstly, the three-dimensional finite element model of gear meshing is established, and the static contact finite element analysis is carried out. By calculating the meshing force and deformation of gear teeth, the comprehensive time-varying meshing stiffness curve is obtained.Then the finite element model of the whole transmission system is established and the modal analysis of the model is carried out. The natural frequency range and mode shape of the gear transmission system are obtained by a more accurate method to calculate the modal of the gear assembly body.The dynamic response of gear transmission system is analyzed, and the vibration velocity, vibration acceleration and vibration displacement of gear transmission system are obtained.Finally, the vibration test of the milling head of NC screw milling machine is carried out. By analyzing the main components of the frequency spectrum, the main vibration and noise in the gear transmission system are determined from the gear meshing, and the results are compared with the dynamic response analysis results.The results are basically the same.
【学位授予单位】：沈阳工业大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH132.41

【引证文献】