偏航、变桨轴承运动方程建立及可靠性研究
发布时间：2018-08-24 08:25
【摘要】：本文选择偏航、变桨轴承作为研究对象,针对偏航、变桨轴承的运动特性构建运动方程,以便准确地计算出其承受的载荷,为偏航、变桨轴承的寿命计算提供理论依据。研究偏航、变桨轴承的常见失效形式,并进一步分析偏航、变桨轴承的可靠性。 偏航轴承的受力分析较复杂,尤其是其运动过程中的受力分析,根据其同时受轴向力、径向力和倾覆力矩的受力特点,偏航轴承一般采用单排四点接触球轴承,变桨轴承则一般采用双排四点接触球轴承。 针对风力发电机用转盘轴承的应用条件讨论在受轴向力、径向力、倾覆力矩作用下正游隙的单排球转盘轴承的载荷分布模型;针对变桨轴承一般采用负游隙的设计要求,研究弹性变形与负游隙之间的关系,并建立空载时负游隙条件下套圈变形的方程;研究偏航、变桨轴承在运动过程中的载荷分布,本文还讨论计算偏航、变桨轴承的寿命方法:承载曲线法和当量动载荷法,并对两种方法做对比;研究偏航、变桨轴承疲劳寿命的估算方法;总结偏航、变桨轴承的多种失效形式。给出对偏航、变桨轴承的滚道、螺栓、齿轮等关键部位校核的方法。 本文完成偏航与变桨轴承的运动方程构建。在构建过程中,分别依据偏航与变桨轴承不同的工况条件建立其空载、受载状态下的运动方程。依据该运动方程可更准确地计算不同的偏航、变桨轴承内部的载荷分布并准确计算承受最大载荷的滚动体的接触应力。为偏航、变桨轴承的寿命和可靠性奠定理论基础。
[Abstract]:In this paper, the yaw and variable propeller bearings are chosen as the research objects, and the motion equations are constructed for the yaw and variable propeller bearings, so as to accurately calculate the load they bear and provide a theoretical basis for the calculation of the life of the yaw and variable propeller bearings. The common failure forms of yaw and variable-propeller bearings are studied, and the reliability of yaw and variable-propeller bearings is further analyzed. The force analysis of yaw bearing is more complicated, especially in the course of its motion. According to the stress characteristics of its axial force, radial force and overturning moment at the same time, the yaw bearing is generally used single row four-point contact ball bearing. Variable-pitch bearings are generally double-row four-point contact ball bearings. The load distribution model of single volleyball rotary bearing with positive clearance under the action of axial force, radial force and overturning moment is discussed in view of the application conditions of rotary disk bearing for wind turbine, and the design requirement of negative clearance is generally used in variable propeller bearing, and the load distribution model of single volleyball rotary disc bearing with positive clearance under the action of axial force, radial force and overturning moment is discussed. The relationship between elastic deformation and negative clearance is studied, and the equation of ring deformation under negative clearance under no-load is established, and the load distribution of yaw and variable propeller bearings in the course of motion is studied, and the calculation of yaw is also discussed in this paper. The life methods of variable propeller bearing are as follows: bearing curve method and equivalent dynamic load method. The two methods are compared; the fatigue life estimation method of yaw and variable propeller bearing is studied; and various failure forms of yaw and variable propeller bearing are summarized. The method of checking the key parts of yaw, pitch bearing, bolt, gear and so on is given. In this paper, the equations of motion of yaw and variable propeller bearings are constructed. In the process of construction, the equations of motion of yaw bearing and variable propeller bearing are established according to the different working conditions of the yaw bearing and the variable propeller bearing. According to the equation of motion, different yaw can be calculated more accurately, the load distribution in the bearing of the variable propeller and the contact stress of the rolling body bearing the maximum load can be calculated accurately. It lays a theoretical foundation for the life and reliability of the pitch bearing.
【学位授予单位】：河南科技大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH133.3
本文编号：2200205
[Abstract]:In this paper, the yaw and variable propeller bearings are chosen as the research objects, and the motion equations are constructed for the yaw and variable propeller bearings, so as to accurately calculate the load they bear and provide a theoretical basis for the calculation of the life of the yaw and variable propeller bearings. The common failure forms of yaw and variable-propeller bearings are studied, and the reliability of yaw and variable-propeller bearings is further analyzed. The force analysis of yaw bearing is more complicated, especially in the course of its motion. According to the stress characteristics of its axial force, radial force and overturning moment at the same time, the yaw bearing is generally used single row four-point contact ball bearing. Variable-pitch bearings are generally double-row four-point contact ball bearings. The load distribution model of single volleyball rotary bearing with positive clearance under the action of axial force, radial force and overturning moment is discussed in view of the application conditions of rotary disk bearing for wind turbine, and the design requirement of negative clearance is generally used in variable propeller bearing, and the load distribution model of single volleyball rotary disc bearing with positive clearance under the action of axial force, radial force and overturning moment is discussed. The relationship between elastic deformation and negative clearance is studied, and the equation of ring deformation under negative clearance under no-load is established, and the load distribution of yaw and variable propeller bearings in the course of motion is studied, and the calculation of yaw is also discussed in this paper. The life methods of variable propeller bearing are as follows: bearing curve method and equivalent dynamic load method. The two methods are compared; the fatigue life estimation method of yaw and variable propeller bearing is studied; and various failure forms of yaw and variable propeller bearing are summarized. The method of checking the key parts of yaw, pitch bearing, bolt, gear and so on is given. In this paper, the equations of motion of yaw and variable propeller bearings are constructed. In the process of construction, the equations of motion of yaw bearing and variable propeller bearing are established according to the different working conditions of the yaw bearing and the variable propeller bearing. According to the equation of motion, different yaw can be calculated more accurately, the load distribution in the bearing of the variable propeller and the contact stress of the rolling body bearing the maximum load can be calculated accurately. It lays a theoretical foundation for the life and reliability of the pitch bearing.
【学位授予单位】：河南科技大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH133.3
【引证文献】
相关硕士学位论文 前1条
1 贾平;偏航变桨轴承力学特性分析及结构优化设计[D];大连理工大学;2012年
，本文编号：2200205
本文链接：https://www.wllwen.com/kejilunwen/jixiegongcheng/2200205.html
