核电站环行起重机吊钩组升降垂线偏差分析

发布时间：2018-05-21 09:53

本文选题：环行起重机 + 吊钩组　；参考：《大连理工大学》2012年硕士论文

【摘要】：核电站环行起重机运行于核反应堆厂房上方的环形轨道上,用于吊运反应堆压力容器顶盖和堆内构件,对其吊装定位精度要求极高。核电站环行起重机吊钩组升降运行的垂线偏差,是影响定位精度的关键因素。本课题属于辽宁省科学计划项目,所研究的核电站环行起重机吊钩组升降垂线偏差,是百万千瓦级三代核电站起重设备重大关键技术,课题研究为核电站环行起重机起升机构的合理布置和钢丝绳的平衡缠绕方法提供了理论依据。考虑到静力学方法忽略了模型的动力学特性,而动力学方法只能支持简单倍率钢丝绳的近似模型,因此本文综合静力学和动力学的方法研究吊钩组升降垂线偏差。本文主要工作如下： (1)建立了核电站环行起重机吊钩组的静力学模型,开发了核电站环行起重机吊钩组升降垂线偏差分析系统。假设吊钩组在起升各个高度受力平衡,将每段钢丝绳等效为一个力的方向,通过求解钢丝绳空间位置求得力的方向,通过求解钢丝绳拉力求得力的大小,从而建立力和力矩平衡方程,结合钢丝绳绳长守恒方程,中间滑轮力矩平衡方程建立吊钩组系统的平衡方程,从而建立核电站环行起重机吊钩组升降垂线偏差分析系统的力学模型。采用MATLAB软件开发了核电站环行起重机吊钩组升降垂线偏差分析系统,分析了钢丝绳缠绕方式、起升高度、起重量、工况对吊钩组的运行轨迹及垂线偏差的影响。 (2)建立了核电站环行起重机吊钩组的动力学模型。在Pro/E软件中建立了核电站环行起重机吊钩组的三维实体模型,并导入ADAMS/View软件环境,采用轴套力方法建立钢丝绳缠绕的动力学模型,对升降垂线偏差进行动力学仿真,求解吊钩组初始平衡位置,分析起重量、起升速度对吊钩组运行轨迹及垂线偏差的影响。 (3)采用静力学和动力学方法对典型算例进行了分析。静力学分析结果表明：滑轮组对称布置垂线偏差小,起升高度与垂线偏差呈近似递增关系,起重量对垂线偏差的影响不明显,吊钩组下降工况与起升工况相比,垂线偏差小且偏差方向相反。动力学分析结果表明：动力学分析结果与静力学分析结果趋势一致,只是存在一定程度波动,钢丝绳缠绕平面上垂线偏差波动峰值的连线近似为静力学分析结果,沿卷筒轴的垂线偏差围绕零值波动。
[Abstract]:The annular crane of nuclear power plant runs on the annular track above the nuclear reactor building, which is used to lift the top cover and the internal components of the reactor pressure vessel, and the precision of the lifting and positioning is very high. The vertical deviation of hooks is a key factor affecting positioning accuracy. This subject belongs to the Liaoning Province science plan project, the hoisting line deviation of the hoisting hook group of the ring crane of the nuclear power station studied, is the important key technology of the three generation nuclear power station lifting equipment of the million kilowatts class. The research provides a theoretical basis for the reasonable arrangement of hoisting mechanism and the balanced winding method of wire rope in annular crane of nuclear power station. Considering that the statics method neglects the dynamic characteristics of the model, but the dynamic method can only support the approximate model of the simple rate wire rope, the method of statics and dynamics is used to study the vertical line deviation of hoisting hooks. The main work of this paper is as follows: 1) the static model of hooks of annular cranes in nuclear power station is established, and the analysis system of vertical line deviation of hooks is developed. Assuming that the hooks are balanced at each height of the hoisting, each segment of the wire rope is equivalent to the direction of a force, the direction of the force is obtained by solving the space position of the wire rope, and the size of the wire rope pulling is solved. Thus, the balance equations of force and torque are established, and the balance equations of hooks system are established by combining the conservation equation of wire rope length and the moment balance equation of intermediate pulley. The mechanical model of the vertical line deviation analysis system for hooks of ring crane in nuclear power station is established. Using MATLAB software, a lifting and vertical deviation analysis system for hooks of annular crane in nuclear power station is developed. The influence of wire rope winding mode, lifting height, lifting weight and working condition on the running track and vertical line deviation of hoist hooks is analyzed. The dynamic model of hooks for annular cranes in nuclear power station is established. The three-dimensional solid model of hooks of annular crane in nuclear power station is established in Pro/E software. The dynamic model of wire rope winding is established by using the method of shaft sleeve force, and the dynamic simulation of the deviation of lifting vertical line is carried out by introducing the ADAMS/View software environment. The initial balance position of the hook group is solved and the effects of lifting weight and lifting speed on the running track and vertical deviation of the hook group are analyzed. 3) A typical example is analyzed by statics and dynamics method. The results of statics analysis show that the vertical deviation of symmetrical arrangement of pulley group is small, the rising height is approximately increasing with the deviation of vertical line, the influence of lifting weight on vertical line deviation is not obvious, and the drop condition of hook group is compared with the lifting condition. The vertical deviation is small and the deviation direction is opposite. The results of dynamic analysis show that the trend of dynamic analysis is consistent with that of static analysis, but there is a certain degree of fluctuation, and the line of the peak value of vertical deviation fluctuation on the winding plane of wire rope is approximately the result of static analysis. The perpendicular deviation along the reel shaft fluctuates around zero.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH21

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