基于静电感应的传动带振动测量研究
发布时间：2018-08-16 10:31
【摘要】：传动带作为一种柔性传动件,具有结构简单、传动平稳、无噪音、缓冲吸振等优点,被广泛地应用在机车发动机、风机、水泵等诸多工业领域。传动带在运动过程中会产生振动,其振动信号中蕴含了传动带运行状态的重要信息,也能够反映出传动带加工误差、装配误差、机械故障及外加随时变化的扭矩等缺陷故障。对传送带振动参数的测量及实时监测可以提高设备运行的可靠性,及时掌握设备运行故障的早期征兆。对于及时发现传送机构的结构设计缺陷、部件故障缺损具有重要意义。本文主要针对基于静电感应的传动带振动测量方法进行研究。本课题的主要工作和创新性研究成果有如下几个方面:1.依据静电感应原理,结合传动带振动测量要求以及静电信号的特点,使用电荷型静电传感器对振动位移进行测量。将电极感应到的电荷量转换成电压信号,再经过信号放大、滤波电路,进入信号采集系统。2.设置了激光位移传感器与静电传感器的对比实验,将在同一时间相近测量点的静电信号与激光位移信号在时域上和频域上进行对比,结果证明静电信号与位移信号具有较高的相关性,并能在频域上指示传动带的振动频率以及各个频率上幅值的相对大小。通过实验验证了静电传感器的测量有效性。3.第一次提出将频域分解法应用于传动带的振动分析中,同时还使用了工作形变分析法进行振动分析。实现了基于静电传感器的传动带振动频率、振型、工作形变的测量。根据振动测量分析实验的要求,设计了传动带振动测量实验装置。可改变传动带的长度、张紧力、纵向速度,并采集不同工况下传动带的静电信号对其进行分析处理。通过对比不同工况下传动带的振动频率、振型、工作形变,掌握了不同带长、张紧力、纵向速度对传动带振动的影响。4.通过对比两种方法的分析结果,总结出这两种方法的特点,并找到两种方法测量结果的一致性和区别。
[Abstract]:As a kind of flexible transmission, the transmission belt has the advantages of simple structure, stable transmission, no noise, cushioning and vibration absorption, and has been widely used in many industrial fields such as locomotive engine, fan, water pump and so on. The vibration of the belt will occur in the course of motion. The vibration signal contains the important information of the running state of the belt, and it can also reflect the defects of the belt, such as machining error, assembly error, mechanical fault and external torque. The measurement and real time monitoring of conveyor belt vibration parameters can improve the reliability of equipment operation and grasp the early signs of equipment running failure in time. It is of great significance to discover the structural design defect and fault defect of the transmission mechanism in time. In this paper, the vibration measurement method of transmission belt based on electrostatic induction is studied. The main work and innovative research results are as follows: 1. According to the principle of electrostatic induction, combined with the requirement of vibration measurement and the characteristics of electrostatic signal, the vibration displacement is measured by charge type electrostatic sensor. The electric charge of the electrode is converted into a voltage signal, and then the signal is amplified and filtered into the signal acquisition system. 2. The contrast experiment between laser displacement sensor and electrostatic sensor is carried out. The electrostatic signal at the same time is compared with the laser displacement signal in time domain and frequency domain. The results show that the electrostatic signal has a high correlation with the displacement signal and can indicate the vibration frequency of the belt and the relative magnitude of the amplitude of each frequency in the frequency domain. The experimental results show that the electrostatic sensor is effective. The frequency domain decomposition method is applied to the vibration analysis of the transmission belt for the first time, and the working deformation analysis method is also used to analyze the vibration. The measurement of vibration frequency, mode shape and working deformation of transmission belt based on electrostatic sensor is realized. According to the requirements of vibration measurement and analysis experiment, a vibration measuring experiment device for transmission belt is designed. The length, tension force and longitudinal velocity of the belt can be changed, and the electrostatic signals of the belt under different working conditions can be analyzed and processed. By comparing the vibration frequency, mode shape and working deformation of the belt under different working conditions, the effects of different belt length, tension force and longitudinal velocity on the vibration of the belt are mastered. By comparing the analysis results of the two methods, the characteristics of the two methods are summarized, and the consistency and difference between the two methods are found.
【学位授予单位】：华北电力大学(北京)
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TH132.31;TP212
本文编号：2185717
[Abstract]:As a kind of flexible transmission, the transmission belt has the advantages of simple structure, stable transmission, no noise, cushioning and vibration absorption, and has been widely used in many industrial fields such as locomotive engine, fan, water pump and so on. The vibration of the belt will occur in the course of motion. The vibration signal contains the important information of the running state of the belt, and it can also reflect the defects of the belt, such as machining error, assembly error, mechanical fault and external torque. The measurement and real time monitoring of conveyor belt vibration parameters can improve the reliability of equipment operation and grasp the early signs of equipment running failure in time. It is of great significance to discover the structural design defect and fault defect of the transmission mechanism in time. In this paper, the vibration measurement method of transmission belt based on electrostatic induction is studied. The main work and innovative research results are as follows: 1. According to the principle of electrostatic induction, combined with the requirement of vibration measurement and the characteristics of electrostatic signal, the vibration displacement is measured by charge type electrostatic sensor. The electric charge of the electrode is converted into a voltage signal, and then the signal is amplified and filtered into the signal acquisition system. 2. The contrast experiment between laser displacement sensor and electrostatic sensor is carried out. The electrostatic signal at the same time is compared with the laser displacement signal in time domain and frequency domain. The results show that the electrostatic signal has a high correlation with the displacement signal and can indicate the vibration frequency of the belt and the relative magnitude of the amplitude of each frequency in the frequency domain. The experimental results show that the electrostatic sensor is effective. The frequency domain decomposition method is applied to the vibration analysis of the transmission belt for the first time, and the working deformation analysis method is also used to analyze the vibration. The measurement of vibration frequency, mode shape and working deformation of transmission belt based on electrostatic sensor is realized. According to the requirements of vibration measurement and analysis experiment, a vibration measuring experiment device for transmission belt is designed. The length, tension force and longitudinal velocity of the belt can be changed, and the electrostatic signals of the belt under different working conditions can be analyzed and processed. By comparing the vibration frequency, mode shape and working deformation of the belt under different working conditions, the effects of different belt length, tension force and longitudinal velocity on the vibration of the belt are mastered. By comparing the analysis results of the two methods, the characteristics of the two methods are summarized, and the consistency and difference between the two methods are found.
【学位授予单位】：华北电力大学(北京)
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TH132.31;TP212
【参考文献】
相关期刊论文 前1条
1 兰羽;;基于AT89C51的超声波测速系统设计[J];电子设计工程;2013年07期
相关硕士学位论文 前1条
1 司倩倩;电涡流传感器稳定性评价与实验研究[D];北京化工大学;2011年
，本文编号：2185717
本文链接：https://www.wllwen.com/jixiegongchenglunwen/2185717.html
