电梯曳引钢丝绳力学性能及磨损研究

发布时间：2018-04-16 13:03

  本文选题：电梯曳引钢丝绳 + 数值模拟　； 参考：《浙江工业大学》2014年硕士论文

【摘要】：电梯曳引钢丝绳作为电梯重要部件,发生磨损、断裂等现象将会给电梯安全使用带来极大的隐患,对电梯曳引钢丝绳力学性能及磨损研究,能给整个电梯安装及电梯曳引钢丝绳设计提供依据,还可以增强电梯曳引钢丝绳使用寿命,对保障乘梯的安全性和经济性有着重要的意义。本文结合理论分析、数值模拟和试验研究等多种方法,深入研究了电梯曳引钢丝绳升降过程中的动态特性、力学性能及磨损情况。本文的主要工作如下：1.通过动力学模型构建和运动过程数值模拟分析,发现在加速度方向发生变化,电梯曳引钢丝绳张力都会发生剧烈振荡,表明此时钢丝绳容易破坏。同时分析了张力在加速、匀速、减速三个阶段随着载重量、运动速度、运行加速度变化的规律以及突变程度的变化,并通过数据的提取和分析得到了载重量、速度、加速度对电梯曳引钢丝绳最大张力值波动影响程度。2.对单股电梯曳引钢丝绳结构(19根钢丝)和电梯曳引钢丝绳8×19结构进行建模及力学分析,研究了钢丝绳的轴向应力和接触应力的情况,并通过对电梯钢丝绳拉伸实验后,进行钢丝绳拆股检查,验证上述钢丝接触应力大小顺序结论的正确性。3.进行了电梯曳引钢丝绳在受轴向载荷情况下的力学分析,发现单股以及整个电梯曳引钢丝绳的轴向应力、接触应力和电梯钢丝绳结构(芯层钢丝半径、内层钢丝半径和捻距、外层钢丝半径和捻距、侧股钢丝捻距)相关,并得出了变化规律。4.结合电梯曳引钢丝绳的数值模拟和力学分析,研究了电梯曳引钢丝绳动力学参数在各个阶段(加速、匀速和减速阶段)对接触应力的影响；同时分析了电梯曳引钢丝绳在过曳引轮时的弯曲应力,以及各股危险钢丝在不同曳引轮半径的情况下的变化规律。5.利用自制的电梯钢丝绳疲劳试验机,对曳引轮直径、载荷力、频率和包角这四个因素进行正交试验,分析了这四个因素对电梯曳引钢丝绳直径磨损率的影响程度及变化规律,并得出了磨损率与这四个因素的线性回归方程。本文围绕电梯曳引钢丝绳展开研究,从理论、数值模拟和试验等方面进行探讨,通过改变钢丝绳结构、升降参数、以及试验工况下其他因素来分析电梯曳引钢丝绳性能和磨损,为高速电梯钢丝绳的研发和电梯整体安装提供基础和依据。
[Abstract]:As an important part of elevator, elevator traction wire rope will bring great hidden trouble to the safe use of elevator, such as wear and tear. The mechanical properties and wear of elevator traction wire rope are studied.It can provide the basis for the installation of the elevator and the design of the elevator traction wire rope. It can also enhance the service life of the elevator traction wire rope. It is of great significance to ensure the safety and economy of the elevator.Based on theoretical analysis, numerical simulation and experimental study, the dynamic characteristics, mechanical properties and wear of elevator towing wire rope are studied in this paper.The main work of this paper is as follows: 1.Based on the dynamic model construction and the numerical simulation analysis of the motion process, it is found that the tension of the elevator traction wire rope will oscillate violently when the acceleration direction changes, which indicates that the wire rope is easy to be destroyed at this time.At the same time, the change of tension in acceleration, uniform speed and deceleration with deadweight, motion speed, running acceleration and sudden change is analyzed, and the deadweight and velocity are obtained by data extraction and analysis.The influence of acceleration on the fluctuation of maximum tension value of elevator towing wire rope is. 2.The model and mechanical analysis of the single-strand elevator traction wire rope structure (19 wires) and the elevator traction wire rope (8 脳 19) structure are carried out. The axial stress and contact stress of the wire rope are studied, and the tensile test of the elevator wire rope is carried out.To verify the correctness of the conclusion of the order of contact stress of the above steel wire. 3.The mechanical analysis of elevator traction wire rope under axial load is carried out. It is found that the axial stress, contact stress and elevator wire rope structure (core layer wire radius, inner layer wire radius and twist distance) of the single strand and the whole elevator traction wire rope are found.The outer wire radius and twist distance, side strand wire twist distance) are related, and the variation rule. 4.Based on the numerical simulation and mechanical analysis of the elevator traction wire rope, the influence of the dynamic parameters of the elevator traction wire rope on the contact stress in each stage (acceleration, uniform speed and deceleration stage) is studied.At the same time, the bending stress of elevator towing wire rope is analyzed, and the variation law of each dangerous steel wire under the condition of different traction wheel radius is analyzed.By using the self-made elevator wire rope fatigue testing machine, the orthogonal test was carried out on the four factors of traction wheel diameter, load force, frequency and angle, and the influence degree and variation law of these four factors on the wear rate of elevator traction wire rope diameter were analyzed.The linear regression equation between wear rate and these four factors is obtained.This paper focuses on the research of elevator towing wire rope, discusses from the aspects of theory, numerical simulation and test, analyzes the performance and wear of elevator traction wire rope by changing the structure of wire rope, lifting parameters, and other factors under test conditions.It provides the foundation and basis for the research and development of high speed elevator wire rope and the overall installation of elevator.
【学位授予单位】：浙江工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU857
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本文编号：1759008