MW级风电联轴器装配工艺及仿真分析

发布时间：2018-02-26 02:10

本文关键词： 强度分析屈曲分析刚度分析疲劳寿命湿热环境联轴器　出处：《西南交通大学》2015年硕士论文　论文类型：学位论文

【摘要】：环境问题已经成为了人类最严峻的挑战之一,尤其是最近十年,能源短缺的消息越来越多的被报道,因此,探寻可持续发展,可再生能源是人类社会不可避免的选择。风能是取之不尽用之不竭,无污染的,经济的可再生资源,世界各地的组织和政府投入大量资金推进风能的研究,这促使全球的风厂迅速增加,风力发电机组的年增长率持续增加。联轴器是齿轮箱高速轴和发电机轴的连接部件,作为风力发电机组重要的一部分,在发电过程中起到关键的作用,它的主要任务是传递扭矩,同时还有诸如降低系统振动和冲击荷载,防止过载,补偿轴向、径向、角向位移,连接和分离轴等作用。本文的主要内容如下：(1)第1章介绍了本文的研究背景和意义,阐述了风力发电的优缺点,联轴器的国内外应用现状和发展趋势,并对研究现状进行总结。(2)第2章介绍联轴器的分类,功能,并以MW级联轴器为研究对象,通过理论分析和数值模拟对其进行研究,用Pro/E进行几何建模,用Patran画网格,用Marc分析其结构响应。(3)第3章对膜片进行了研究,分析了传递扭矩对膜片产生的拉力和压力以及膜片受到的离心力,由此计算膜片的屈曲,分析其屈曲安全系数并调整膜片尺寸以保证其在最大载荷下不发生失稳。此外,本章也对膜片的疲劳寿命也进行了分析,通过计算膜片在给定荷载工况下的受力情况,并考虑了风力发电机组要在野外工作超过20年,检验膜片的疲劳寿命是否满足要求。(4)第4章计算了联轴器在自由状态和约束状态下的固有频率,检验了联轴器在工作转速和最大转速范围内是否发生共振。此外本章还对联轴器的整体刚度进行了分析,计算联轴器整体的轴向拉压刚度,各方向的弯曲刚度和扭转刚度。(5)第5章分析了端盖与锥套2之间的螺栓预紧力以及无键联轴器与电机轴安装时的螺栓预紧力,讨论了螺栓预紧力与打滑力矩的关系。由于联轴器需要满足不打滑的要求,因此本章合理确定了螺栓预紧力的大小,以保证不同螺栓预紧力时的打滑力矩均满足设计打滑力矩。(6)第6章研究了湿热环境形下复合材料纤维筒在纯扭转工况下的力学性能。首先利用单层材料在湿热环境下的本构关系推导复合材料纤维筒在扭矩作用下的变形公式,由此讨论了湿度、温度、纤维方向角等相关参数对变形的影响,再通过数值模拟与上述结果进行比较,验证结论的正确性。
[Abstract]:Environmental problems have become one of mankind's most serious challenges, especially in the past decade, when the news of energy shortage has been reported more and more, therefore, to explore sustainable development, Renewable energy is the inevitable choice of human society. Wind energy is inexhaustible, pollution-free, economic renewable resources, organizations and governments around the world have invested a lot of money to promote wind energy research. This has led to a rapid increase in wind power plants around the world and a sustained increase in the annual growth rate of wind turbines. The coupling is a connecting part of the gearbox high-speed shaft to the generator shaft as an important part of the wind turbine. Plays a key role in the generation process, its main task is to transfer torque, but also to reduce system vibration and impact load, prevent overload, compensate axial, radial, angular displacement, The main contents of this paper are as follows: 1. Chapter 1 introduces the research background and significance of this paper, describes the advantages and disadvantages of wind power generation, the application status and development trend of coupling at home and abroad. Chapter 2 introduces the classification and function of coupling, and takes MW coupling as research object, studies it through theoretical analysis and numerical simulation, uses Pro/E to model geometry, draws mesh with Patran. The structure response of the diaphragm was analyzed by Marc. In Chapter 3, the tension and pressure of the transfer torque on the diaphragm and the centrifugal force on the diaphragm were analyzed, and the buckling of the diaphragm was calculated. The buckling safety factor is analyzed and the size of the diaphragm is adjusted to ensure that the diaphragm does not lose its stability under the maximum load. In addition, the fatigue life of the diaphragm is also analyzed in this chapter. Considering that wind turbine should work in the field for more than 20 years to check whether the fatigue life of the diaphragm meets the requirement. Chapter 4 calculates the natural frequency of the coupling in free and constrained state. The resonance between the working speed and the maximum speed of the coupling is checked. In addition, the overall stiffness of the coupling is analyzed, and the axial tension and compression stiffness of the coupling is calculated. In chapter 5, the bolt pretightening force between the end cap and the cone sleeve and the bolt pretightening force between the key free coupling and the motor shaft are analyzed. The relationship between bolt pre-tightening force and slip torque is discussed. As the coupling needs to meet the requirement of non-skid, the size of bolt pre-tightening force is reasonably determined in this chapter. In chapter 6, the mechanical properties of composite fiber cylinder under pure torsion are studied. Firstly, the single layer material is used in the wet and hot ring. The constitutive relation of the composite fiber tube under the action of torque is derived. The effects of humidity, temperature and fiber direction angle on the deformation are discussed, and the results are compared with the above results by numerical simulation to verify the correctness of the conclusions.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM315

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