矿用提升机盘式制动器正压力分析及其检测方法

发布时间：2018-01-12 20:31

本文关键词：矿用提升机盘式制动器正压力分析及其检测方法　出处：《太原理工大学》2017年硕士论文　论文类型：学位论文

【摘要】：提升机是煤矿生产运输中的关键设备,提升机的良好运行对确保煤矿安全生产、生产效率以及可靠性等意义重大。在提升机制动过程中,如果盘式制动器产生的制动力不足,制动力矩小于3倍最大静力矩,就会引发严重的事故。一旦发生事故将造成无法估计的经济损失,甚至造成人员伤亡事故,对矿工家庭乃至国家和社会带来严重影响,后果不堪设想。矿井提升机恒减速制动是处理提升过程中紧急安全事故的最佳方式,而盘式制动器的制动正压力是决定制动减速度的关键因素之一,因此对盘式制动器在恒减速工况下的制动正压力分析及其检测方法的研究很有必要。本文基于多体系统刚柔耦合动力学建模方法,对含有刚体和柔性体的盘式制动器进行了建模理论研究,并利用ANSYS软件对其进行了仿真分析。本文的具体研究工作和成果主要有:第一,介绍研究盘式制动器动态特性的目的及意义,着重介绍了盘式制动器的构成、工作原理、发展情况以及关于盘式制动器国内外学者的研究现状,最后提出了论文的主要研究内容。第二,对刚柔耦合系统动力学理论基础进行了分析,其中对模态综合法、柔性体内应力求解方法以及截面内应力的有限元求解法几个方面的内容进行了重点介绍;简要的介绍了ANSYS Workbench软件平台,利用图表清晰地说明了软件平台进行数值模拟分析的流程。第三,根据提升机恒减速制动液压系统的工作原理,在SimulationX软件中对采用全数字PID控制的恒减速制动液压系统进行了仿真分析。研究结果得出恒减速制动过程中减速度的变化情况与制动正压力密切相关,而且获得了实际工作情况下油压力的变化情况,为分析提升机恒减速制动过程中正压力的分布情况奠定基础。第四,根据实际盘式制动器结构设计图,运用UG软件建立盘式制动器的三维模型,模型简化后导入有限元软件Ansys中,对其进行了刚柔耦合瞬态动力学仿真分析,获得盘式制动器中柔性部件的动应力分布云图及应力曲线。最后对各柔性部件的受力进行分析比较,确定能够表征正压力的部件,为后续正压力检测方法的设计提供基础。第五,依据刚柔耦合瞬态动力学仿真分析得到的结果,设计了一种实时检测盘式制动器正压力的方法。阐述了应变式力传感器设计中存在的问题,通过有限元分析确定了布置应变片的位置和方位,设计了对应的桥路连接方式,最后对本检测方法优势进行了说明。最后,对全文的主要研究工作以及成果进行了总结,指出今后工作需要完善和提高的地方,对下一步工作进行展望。
[Abstract]:Hoist is the key equipment in coal mine production and transportation. The good operation of hoist is of great significance to ensure the safety, production efficiency and reliability of coal mine. If the brake force is insufficient and the brake torque is less than three times the maximum static moment, the disc brake will cause serious accidents. Once an accident occurs, it will cause incalculable economic losses, and even cause casualties. The mine hoist constant deceleration braking is the best way to deal with the emergency safety accident in the process of lifting. The positive braking pressure of disc brake is one of the key factors of braking deceleration. Therefore, it is necessary to study the positive pressure analysis of disc brake under constant deceleration condition and its detection method. This paper is based on the rigid-flexible coupling dynamic modeling method of multi-body system. The modeling theory of disc brake with rigid body and flexible body is studied, and the simulation analysis is carried out by using ANSYS software. The specific research work and achievements are as follows: first. The purpose and significance of studying the dynamic characteristics of disc brake are introduced. The composition, working principle, development and research status of disc brake at home and abroad are emphatically introduced. Finally, the main research contents of the thesis are put forward. Secondly, the theoretical basis of rigid-flexible coupling system dynamics is analyzed, in which the modal synthesis method is analyzed. The method of solving the stress in flexible body and the finite element method of the stress in the section are introduced in detail. The software platform of ANSYS Workbench is introduced briefly, and the flow of numerical simulation and analysis of the software platform is explained clearly by using the chart. According to the hoist constant deceleration brake hydraulic system working principle. The hydraulic system of constant deceleration brake controlled by digital PID is simulated and analyzed in SimulationX software. The research results show that the change of deceleration speed and braking positive during the process of constant deceleration braking are obtained. Stress is closely related. Moreover, the variation of oil pressure under actual working conditions is obtained, which lays a foundation for analyzing the distribution of positive pressure in the process of constant deceleration braking of hoist. 4th, according to the structural design diagram of actual disc brake. The three-dimensional model of disc brake was established by UG software. The model was simplified and imported into the finite element software Ansys. The transient dynamic simulation of rigid and flexible coupling was carried out. The dynamic stress distribution cloud diagram and stress curve of flexible parts in disc brake are obtained. Finally, the force of each flexible component is analyzed and compared to determine the components that can represent the positive pressure. It provides the foundation for the design of the following positive pressure detection method. 5th, according to the results of the rigid-flexible coupling transient dynamic simulation analysis. A method of real-time detecting positive pressure of disc brake is designed. The problems existing in the design of strain force sensor are expounded. The position and orientation of the strain gauge are determined by finite element analysis. At last, the advantages of this testing method are explained. Finally, the main research work and results are summarized, and the work needs to be improved and improved in the future. The future work is prospected.
【学位授予单位】：太原理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD534

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