多绳同步连续快速更换装置的研究

发布时间：2018-05-29 12:46

本文选题：多绳摩擦式提升机 + 首绳更换装置　；参考：《太原理工大学》2015年硕士论文

【摘要】：随着我国矿井提升技术的不断进步,多绳摩擦式提升机在立井提升系统中得到了广泛使用。但其提升钢丝绳更换工作较为频繁,且需在井筒作业,作业人员多,难度大,劳动强度高。现有换绳装置大幅减少了换绳作业时间,提高了换绳的安全性和可靠性。但现有换绳装置普遍存在整体性差,不能多绳同步更换,无法实现不同绳径首绳更换等问题,甚至存在损绳、遛绳以及破坏提升系统等安全隐患,严重影响了矿井的安全高效生产。因此,研究设计一种新型首绳更换装置具有重要意义。本文分析了现有换绳工艺及换绳辅助装置存在的不足与缺陷,提出了新型首绳更换装置的设计目标,经过方案论证确定了多绳同步连续快速更换装置的设计方案,明确了各机械系统组成和工作原理,并针对换绳动作要求设计了装置液压系统,对液压系统机能和油路运行特性进行了分析。利用仿真软件AMEsim对多绳同步连续快速更换装置液压系统建立了仿真模型,针对液压系统动态特性,分别对系统压力以及电液换向阀额定流量等关键参数设置不同参数进行仿真。通过对比仿真数据,在满足装置设计要求的前提下,综合考虑系统稳定性及节能因素,合理选定系统压力以及电液换向阀额定流量等参数并对其进行优化。对首绳更换装置核心机构连续送绳装置链传动进行啮合机理分析及ADAMS动力学仿真,确定了链轮齿数为影响连续送绳装置动态特性及送绳稳定的关键因素,发现随着链轮轮齿数量的增加,链传动多边形效应降低,链节速度变化较小,从动轮角速度变化逐渐平缓,单个链节受力降低,链传动稳定性提高,送绳过程中钢丝绳波动减小,送绳稳定性和安全性提高。应用ADAMS动力学仿真软件建立连续送绳装置仿真模型,对不同换绳工况下链传动及钢丝绳动态特性进行分析,连续送绳装置与传统送绳装置相比送绳过程中冲击较小,送绳速度快且运行平稳,但当送绳速度或送绳载荷增加时,连续送绳装置及钢丝绳动态特性波动加剧,装置送绳安全性和可靠性降低,在换绳过程中需根据实际换绳工况进行送绳参数选择。对超速抓捕装置进行机液耦合仿真,验证了其机械系统和液压系统能够在不同工况下实现协调动作对钢丝绳进行有效抓捕,保证了换绳装置在首绳更换过程中的安全性。通过对比仿真数据发现当钢丝绳载荷一定时,捕绳时间随遛绳速度的增加而减小；遛绳速度一定时,捕绳时间随钢丝绳载荷的增加而减小。
[Abstract]:With the development of mine hoisting technology in China, multi-rope friction hoist has been widely used in shaft hoisting system. But its lifting wire rope replacement work is more frequent, and needs to work in the wellbore, the operator is more difficult, the labor intensity is high. The existing rope changing device greatly reduces the rope changing operation time and improves the safety and reliability of rope changing. However, the existing rope changing devices generally have some problems, such as poor integrity, unable to replace multiple rope synchronously, unable to replace the first rope with different rope diameter, and even some safety hidden dangers such as damaged rope, rope walking and damage to the lifting system, etc. Has seriously affected the mine safe and efficient production. Therefore, it is of great significance to study and design a new type of head rope replacement device. In this paper, the shortcomings and defects of the existing rope changing technology and rope changing auxiliary device are analyzed, and the design goal of the new type of rope replacement device is put forward, and the design scheme of the multi-rope synchronous and continuous rapid replacement device is determined through the scheme demonstration. The composition and working principle of each mechanical system are clarified and the hydraulic system of the device is designed according to the requirements of rope changing operation. The function of the hydraulic system and the operating characteristics of the oil circuit are analyzed. The simulation model of hydraulic system of multi-rope synchronous and continuous rapid replacement device is established by using the simulation software AMEsim. According to the dynamic characteristics of hydraulic system, different parameters such as system pressure and the rated flow rate of electro-hydraulic directional valve are set up respectively. By comparing the simulation data and considering the system stability and energy saving factors, the parameters such as system pressure and the rated flow rate of the electro-hydraulic directional valve are selected and optimized under the premise of meeting the requirements of the device design. The meshing mechanism and ADAMS dynamics simulation of the chain drive of the continuous rope feeding device of the core mechanism of the head rope replacement device are analyzed. It is determined that the number of the sprocket teeth is the key factor affecting the dynamic characteristics of the continuous rope feeding device and the stability of the rope feeding device. It is found that with the increase of the number of sprocket teeth, the polygon effect of chain transmission decreases, and the change of chain speed is small. The change of angular velocity of driving wheel is gradually smooth, the force of single link decreases, and the stability of chain transmission is improved. In the process of rope feeding, the fluctuation of wire rope is reduced, and the stability and safety of wire rope are improved. The simulation model of continuous rope feeding device is established by using ADAMS dynamic simulation software. The dynamic characteristics of chain transmission and wire rope under different rope changing conditions are analyzed. Compared with the traditional rope feeding device, the continuous rope feeding device has less impact on the rope feeding process. The speed of rope feeding is fast and running smoothly, but when the speed or load increases, the fluctuation of dynamic characteristics of continuous rope feeding device and wire rope is increased, and the safety and reliability of the device are decreased. In the course of changing rope, the parameters of rope feeding should be selected according to the actual condition of changing rope. The mechanism and liquid coupling simulation of the overspeed capture device is carried out, which verifies that the mechanical system and hydraulic system can coordinate the action to catch the wire rope effectively under different working conditions, thus ensuring the safety of the wire rope changing device in the process of the first rope replacement. By comparing the simulation data, it is found that when the wire rope load is constant, the rope catching time decreases with the increase of the rope walking speed, and with the constant rope walking speed, the rope catching time decreases with the increase of the wire rope load.
【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】：TD534

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