摘要如今的风力机组在运行时其齿轮箱中的轴承故障是多发且危害严重的问题之一， 对于轴承故障模式的研究对于风力机运行效率与寿命具有十分重要的影响。本文主要 以深沟球轴承为研究对象，首先在 Matlab/Simulink 中建立了风力机整机模型，并对定 风速和变风速两种情况运用 PID 控制算法实现取得较高的风能利用率以及稳定输出功 率，得到了电机输出转矩与转速。之后使用 Solidworks 软件绘制轴承模型并导入到 ANSYS 中进行温度场和应力场分析其疲劳特性。然后对于滚动体胶合和磨损这两种轴 承常见的故障模式进行 ANSYS 仿真模拟导出其在故障模式下的温度、形变和应力云 图并进行疲劳校核。结果表明在胶合和磨损两种故障模式下，轴承的温度、应力分布 都有不同程度的变化。对于胶合故障，整体温度变化不大，但最高温度升高了 9 摄氏 度，滚珠与内滚道的接触应力出现了较大的增幅，而对于磨损故障时，故障滚动体相 邻的正常滚动体的温度明显升高，其形变量和热应力也明显增加，更加容易引起疲劳 载荷和疲劳剥落等问题77070
毕业论文关键词 ：风力机； 轴承故障； ANSYS 有限元分析； 胶合故障； 磨损故障
毕 业 设 计 说 明 书 外 文 摘 要
Title Fault Simulation And Fatigue Assessment of wind Turbine Gear Box Bearing Based On ANSYS
Abstract Bearing failure of the gearbox is one of the frequent and harmful problem when the wind turbine under operation, which will greatly affect the efficiency and life of the wind turbine。 This paper regard deep groove ball bearing as the research object, first of all, we establish the wind turbine model based on the constant wind speed and variable wind speed in the Matlab/Simulink, and then using the PID control algorithm to ensure the high wind energy utilization rate and stable output power, which we can gain the output torque and rotation rate。 Then we use the solidworks to draw the bearing model, which will be imported into the ANSYS to analysis the temperature , stress field and fatigue problem。 Next the two kinds of common failure modes, such as rolling body bonding and wearing,are simulated by ANSYS, and we can obtain the temperature, stress and deformation nephogram。 The results show that the temperature and stress distribution of the bearing are changed in different degrees under
the two failure modes compared with normal operation bearing。 For rolling bearing bonding，
the overall temperature change is small, but the highest temperature of the bearing increased 9 degrees Celsius, and the contact stress of the ball and roll increased much。 For the rolling body wearing ,the temperature and stress of the rolling body adjacent the fault one increased significantly, which will lead fatigue load and fatigue spalling problems。
Keywords: wind turbine; failure of bearing; finite element method based on ANSYS; rolling body bonding; rolling body wearing
本科毕业设计说明书 第 I 页
目 录
1 引言 1
1。1 课题背景 1
1。3 本文研究内容及思路方法 4
2 风力机整机系统仿真 7
2。1 定风速仿真 7
2。2 变风速仿真 11
2。3 总结分析 14
3 基于 ANSYS 的轴承在正常运行时的疲劳分析 17
3。1 计算摩擦生热 ANSYS风电齿轮箱轴承故障仿真及疲劳评估:http://www.youerw.com/zidonghua/lunwen_88523.html