立井刚性罐道的振动特性研究

发布时间：2019-03-06 06:54

【摘要】：提升设备的性能影响着煤矿生产的效率和可靠性,立井提升设备又肩负着煤矿提升、生产运送、工人运输等任务。随着煤矿技术发展,矿井采掘深度不断加深,增加了对提升设备安全性的考验。因此,设备的安全稳定运行至关重要。如果采用传统的检测方法,不但会影响生产过程,而且检测不准确、速度慢。针对这种情况,本文提出的检测方法是对罐笼的运行状态参数的采集,再分析振动信号的特征,以此来甄别故障种类。分别在提升容器满载、轻载、高速、常速的状态下,采集罐笼的振动加速度数据,再分析不同速度和不同载荷与振动加速度输出的关系。本文的研究工作包括:建立罐笼—罐道竖直方向动力学模型,以罐道各种故障状态为激励源,探究了在各种工作状态下罐笼振动加速度输出和罐道故障种类的联系。利用Simulink对罐道的各种缺陷:异常凸起、台阶凸起、弯曲激励、倾斜激励、表面不平顺等进行仿真,模拟的结果表明:随着罐笼载荷的增加,罐笼的输出加速度振幅随之减小;而随着提升速度的增加,输出加速度振幅随之增大。建立罐笼模型并进行模态分析,确定了罐笼在不同扰动频率下的最大振动响应位置,为传感器的布置位置和数据采集奠定了基础。拟定了实验方案,对新庄孜矿的某台罐笼,分别进行了常速重载、常速轻载和快速轻载三种工况的数据采集。对采集的数据进行小波降噪,分解降噪后的信号,根据故障的实际频带,重构有用信号,进行故障诊断,分析了振动加速度和上述工况的联系。实验为今后罐道的检修和设计安装提供了指导,同时也表明仿真模型适用于实际情况。
[Abstract]:The performance of upgrading equipment affects the efficiency and reliability of coal mine production, and the vertical shaft lifting equipment shoulders the tasks of coal mine upgrading, production transportation, worker transportation and so on. With the development of coal mine technology, the depth of mine excavation deepens, which increases the test of equipment safety. Therefore, the safe and stable operation of the equipment is very important. If the traditional detection method is used, not only the production process will be affected, but also the detection is inaccurate and the speed is slow. In view of this situation, the detection method proposed in this paper is to collect the operating state parameters of the cage, and then analyze the characteristics of the vibration signal so as to distinguish the types of faults. Under the condition of full load, light load, high speed and constant speed respectively, the vibration acceleration data of the cage are collected and the relationship between the output of vibration acceleration and different velocity and load is analyzed. In this paper, the dynamic model of cage-track vertical direction is established and the relation between vibration acceleration output of cage and fault type of tank track is studied by using various fault states of tank channel as excitation source. All kinds of defects of tank channel are simulated by Simulink, such as abnormal bulge, step bulge, bending excitation, tilt excitation, surface irregularity, etc. The simulation results show that the amplitude of output acceleration of cage decreases with the increase of cage load. With the increase of the lifting speed, the amplitude of the output acceleration increases. The model of cage is established and modal analysis is carried out to determine the maximum vibration response position of cage under different disturbance frequencies, which lays a foundation for sensor placement and data acquisition. The experimental scheme was drawn up, and the data acquisition of a cage in Xinzhuangzi Mine was carried out under three working conditions, namely, constant speed and heavy load, constant speed light load and fast light load. According to the actual frequency band of the fault, the useful signal is reconstructed and the fault diagnosis is carried out. The relation between the vibration acceleration and the above-mentioned working conditions is analyzed and the relationship between the vibration acceleration and the above-mentioned working conditions is analyzed. The experiment provides the guidance for the maintenance, design and installation of the tank track in the future, and also shows that the simulation model is suitable for the actual situation.
【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD53

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