磁致伸缩悬臂梁在水轮机组振动检测中的应用研究
发布时间：2019-06-13 16:47
【摘要】：随着电力需求的增长,水电站发电机组也越来越多,维持其在一个稳定安全的运行状态就尤为重要。因为振动会对水轮机组的平稳正常运行造成很大的影响,甚至影响使用寿命,造成运行成本的提高。所以,在水电站中对水轮机组的振动检测是相当重要的。振动传感器作为采集振动信息的部件,其性能优劣对于振动监测系统综合性能起着至关重要的作用。由于磁致伸缩材料具有很好的性能,所以本文将磁致伸缩逆效应与悬臂梁相结合,制备磁致伸缩材料悬臂梁,作为提出新的振动传感器的信息采集元件以期提高性能,通过对比现有振动传感器,则该传感器在理论上具有无需外加电源、抗干扰能力强,灵敏度高、体积小等优点。本文工作的主要内容为:1、对悬臂梁进行应力应变分析,分析比较在同一条件下的不同材料具有的弯曲性能,从而确定适用于制备磁致伸缩悬臂梁的材料。2、采用切片加工方法粘接制作磁致伸缩悬臂梁,该过程可以分为两个步骤,分别为熔炼浇铸合金棒和切片粘接制作悬臂梁。对磁致伸缩材料合金棒进行实验制备,研究分析磁致伸缩材料合金棒的制作工艺,探究不同工艺条件下对制备合金的影响;通过对制备的磁致伸缩材料合金棒切片加工,制作磁致伸缩悬臂梁并分析研究影响因素。3、进行感应电压模型分析,根据需要搭建实验检测平台,测量悬臂梁在磁场作用下的挠度;根据实验数据分析计算得到在不同大小磁场作用下的磁场磁致伸缩系数,并绘制关系曲线。同时不考虑漏磁等干扰因素,根据线性关系可知此时悬臂梁磁感应的动态变化值将会达到数特斯拉(T),计算知产生的感应电压能够满足其作为传感器采集元件的条件需要。
[Abstract]:With the increase of power demand, the hydropower station is becoming more and more, and it is especially important to maintain its operating condition in a stable and safe condition. The vibration will have a great influence on the smooth and normal operation of the water turbine unit, and even the service life, resulting in an increase in operating cost. Therefore, it is important to detect the vibration of the turbine set in the hydropower station. As a component of the vibration information, the vibration sensor plays an important role in the comprehensive performance of the vibration monitoring system. Because the magnetostrictive material has good performance, the magnetostriction inverse effect is combined with the cantilever beam to prepare the magnetostrictive material cantilever beam, The sensor has the advantages of no need of external power supply, strong anti-interference capability, high sensitivity, small volume and the like in theory. The main content of this paper is:1. The stress-strain analysis of the cantilever beam is carried out, the bending performance of different materials under the same condition is analyzed, and the material suitable for preparing the magnetostrictive cantilever beam is determined. The process can be divided into two steps, namely, smelting and casting alloy rods and slicing and bonding to make the cantilever beams. The magnetostriction material alloy rod is experimentally prepared, the manufacturing process of the magnetostrictive material alloy rod is researched, the influence of different process conditions on the preparation of the alloy is explored, and the prepared magnetostrictive material alloy rod is processed by slicing, The magnetostriction cantilever beam was made and the influence factor of the study was analyzed.3. The induced voltage model was analyzed, and an experiment detection platform was set up according to the requirement, and the deflection of the cantilever beam under the action of the magnetic field was measured. According to the experimental data analysis, the magnetostriction coefficient of the magnetic field under the action of the magnetic field of different sizes is obtained, and the relation curve is drawn. At the same time, the interference factors such as magnetic leakage are not considered, and according to the linear relation, the dynamic change value of the magnetic induction of the cantilever beam will reach the number of Tesla (T), and the calculated induced voltage can meet the condition requirement of the sensor collecting element.
【学位授予单位】：南昌工程学院
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TV736
本文编号：2498662
[Abstract]:With the increase of power demand, the hydropower station is becoming more and more, and it is especially important to maintain its operating condition in a stable and safe condition. The vibration will have a great influence on the smooth and normal operation of the water turbine unit, and even the service life, resulting in an increase in operating cost. Therefore, it is important to detect the vibration of the turbine set in the hydropower station. As a component of the vibration information, the vibration sensor plays an important role in the comprehensive performance of the vibration monitoring system. Because the magnetostrictive material has good performance, the magnetostriction inverse effect is combined with the cantilever beam to prepare the magnetostrictive material cantilever beam, The sensor has the advantages of no need of external power supply, strong anti-interference capability, high sensitivity, small volume and the like in theory. The main content of this paper is:1. The stress-strain analysis of the cantilever beam is carried out, the bending performance of different materials under the same condition is analyzed, and the material suitable for preparing the magnetostrictive cantilever beam is determined. The process can be divided into two steps, namely, smelting and casting alloy rods and slicing and bonding to make the cantilever beams. The magnetostriction material alloy rod is experimentally prepared, the manufacturing process of the magnetostrictive material alloy rod is researched, the influence of different process conditions on the preparation of the alloy is explored, and the prepared magnetostrictive material alloy rod is processed by slicing, The magnetostriction cantilever beam was made and the influence factor of the study was analyzed.3. The induced voltage model was analyzed, and an experiment detection platform was set up according to the requirement, and the deflection of the cantilever beam under the action of the magnetic field was measured. According to the experimental data analysis, the magnetostriction coefficient of the magnetic field under the action of the magnetic field of different sizes is obtained, and the relation curve is drawn. At the same time, the interference factors such as magnetic leakage are not considered, and according to the linear relation, the dynamic change value of the magnetic induction of the cantilever beam will reach the number of Tesla (T), and the calculated induced voltage can meet the condition requirement of the sensor collecting element.
【学位授予单位】：南昌工程学院
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TV736
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