摩擦提升系统提升钢丝绳的振动分析与试验研究

发布时间：2019-01-05 04:36

【摘要】：随着人们对矿产资源的不断开采，提升系统的提升高度和运行速度都在不断的提高。由此产生了对提升系统中提升钢丝绳的安全性和稳定性的更高的要求。鉴于此，对提升系统在运动过程中提升钢丝绳的动态特性进行深入且详细的研究已经迫在眉睫。矿井提升系统是一种典型的柔性传动提升系统，一般由摩擦轮、提升容器/平衡锤、提升钢丝绳、平衡钢丝绳等主要部件构成。提升钢丝绳与提升容器相连，从而引导提升容器的上下运行。由于提升钢丝绳自身的柔性特性以及复杂的外界干扰条件，因此在提升系统的整个运动过程中，提升钢丝绳的动态特性极其复杂。本文采用理论分析与现场真实试验相结合的研究方法，对立井提升系统提升钢丝绳的动态特性进行了较深入的研究。根据矿井提升系统中提升钢丝绳的柔性特性，将平衡钢丝绳的时变质量等效到提升容器上，忽略其振动产生的影响。基于能量法，利用哈密顿原理，建立柔性提升钢丝绳纵向-横向耦合振动的非线性控制微分方程；并使用数值求解方法——伽辽金法，，对所建立的方程进行求解。理论模型的可靠性与有效性通过现场试验进行了验证。文章以双激励条件下的提升钢丝绳横向振动模型为基础，研究了上、下激励分别、共同作用以及载荷对提升钢丝绳横向振动动态特性的影响。并通过改变外界激励的频率，得出外界激励频率与提升容器的固有频率相等时，提升钢丝绳横向振动振幅最大，应尽量避免之。接着利用控制变量与仿真的方法，分别研究了提升容器与罐道之间弹簧的刚度系数k、集中阻尼c、以及存在于整个提升系统的系统阻尼cd对提升钢丝绳的横向振动影响。总体来说，本文对立井提升系统中提升钢丝绳的动态特性进行了深入的理论和试验研究；着重揭示了由于外界干扰激励以及不同结构参数对提升钢丝绳横向振动产生的影响。本文的研究成果为柔性提升系统的相关研究提供了分析思路和理论基础，试图为更加深入地研究矿井提升系统提升钢丝绳的安全性提供了途径与方法。
[Abstract]:With the continuous exploitation of mineral resources, the elevation of the system and the speed of operation are constantly improved. Therefore, higher requirements for the safety and stability of the hoisting rope in the hoisting system are created. In view of this, it is urgent to study the dynamic characteristics of hoisting wire rope in motion. Mine hoisting system is a typical flexible transmission hoisting system, which is generally composed of friction wheel, lifting vessel / balance hammer, hoisting wire rope, balancing wire rope and other main components. The hoisting wire rope is connected to the lifting container to guide the lifting vessel up and down. Because of the flexible characteristics of the hoisting wire rope and the complex external interference conditions, the dynamic characteristics of the hoisting rope are extremely complex during the whole motion process of the hoisting system. In this paper, the dynamic characteristics of hoisting wire rope of shaft hoisting system are studied deeply by combining theoretical analysis with field real test. According to the flexible characteristics of hoisting wire rope in mine hoisting system, the time-varying mass of balanced wire rope is equivalent to the lifting vessel, and the effect of vibration is ignored. Based on energy method and Hamiltonian principle, the nonlinear governing differential equation of longitudinal and transverse coupling vibration of flexible hoisting wire rope is established, and the Galerkin method is used to solve the equation. The reliability and validity of the theoretical model are verified by field tests. Based on the transverse vibration model of hoisting wire rope under the condition of double excitation, the effects of upper and lower excitation, mutual action and load on the dynamic characteristics of transverse vibration of hoisting wire rope are studied in this paper. By changing the frequency of external excitation, it is concluded that when the external excitation frequency is equal to the natural frequency of the lifting vessel, the transverse vibration amplitude of the hoisting wire rope is the largest, which should be avoided as far as possible. Then the effects of spring stiffness coefficient k, concentrated damping c, and system damping cd in the whole hoisting system on the transverse vibration of hoisting wire rope are studied by means of control variables and simulation methods, respectively. In general, the dynamic characteristics of hoisting rope in shaft hoisting system are studied theoretically and experimentally in this paper, and the influence of external disturbance and different structural parameters on the transverse vibration of hoisting wire rope is emphasized. The research results in this paper provide an analytical idea and theoretical basis for the research of flexible hoisting system, and try to provide a way and method for further research on the safety of hoisting wire rope in mine hoisting system.
【学位授予单位】：太原理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD532

【参考文献】