發(fā)布時間：2019-06-13 16:47

【摘要】：隨著電力需求的增長,水電站發(fā)電機組也越來越多,維持其在一個穩(wěn)定安全的運行狀態(tài)就尤為重要。因為振動會對水輪機組的平穩(wěn)正常運行造成很大的影響,甚至影響使用壽命,造成運行成本的提高。所以,在水電站中對水輪機組的振動檢測是相當重要的。振動傳感器作為采集振動信息的部件,其性能優(yōu)劣對于振動監(jiān)測系統(tǒng)綜合性能起著至關(guān)重要的作用。由于磁致伸縮材料具有很好的性能,所以本文將磁致伸縮逆效應與懸臂梁相結(jié)合,制備磁致伸縮材料懸臂梁,作為提出新的振動傳感器的信息采集元件以期提高性能,通過對比現(xiàn)有振動傳感器,則該傳感器在理論上具有無需外加電源、抗干擾能力強,靈敏度高、體積小等優(yōu)點。本文工作的主要內(nèi)容為:1、對懸臂梁進行應力應變分析,分析比較在同一條件下的不同材料具有的彎曲性能,從而確定適用于制備磁致伸縮懸臂梁的材料。2、采用切片加工方法粘接制作磁致伸縮懸臂梁,該過程可以分為兩個步驟,分別為熔煉澆鑄合金棒和切片粘接制作懸臂梁。對磁致伸縮材料合金棒進行實驗制備,研究分析磁致伸縮材料合金棒的制作工藝,探究不同工藝條件下對制備合金的影響;通過對制備的磁致伸縮材料合金棒切片加工,制作磁致伸縮懸臂梁并分析研究影響因素。3、進行感應電壓模型分析,根據(jù)需要搭建實驗檢測平臺,測量懸臂梁在磁場作用下的撓度;根據(jù)實驗數(shù)據(jù)分析計算得到在不同大小磁場作用下的磁場磁致伸縮系數(shù),并繪制關(guān)系曲線。同時不考慮漏磁等干擾因素,根據(jù)線性關(guān)系可知此時懸臂梁磁感應的動態(tài)變化值將會達到數(shù)特斯拉(T),計算知產(chǎn)生的感應電壓能夠滿足其作為傳感器采集元件的條件需要。
[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.
【學位授予單位】：南昌工程學院
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TV736

【參考文獻】

相關(guān)期刊論文 前10條

1 李叢珊;姜印平;;一種磁致伸縮位移傳感器的優(yōu)化設(shè)計方法[J];傳感技術(shù)學報;2014年09期

2 楊天娟;施偉斌;王婷;;傳感器及其概述[J];電子技術(shù)與軟件工程;2014年16期

3 于洪波;;大中型水輪發(fā)電機組振動原因分析及判斷[J];防爆電機;2014年02期

4 代前國;周新志;;大位移磁致伸縮傳感器的彈性波建模與分析[J];傳感技術(shù)學報;2013年02期

5 陳忠潤;梅德波;;淺論水輪發(fā)電機組振動原因分析[J];科技創(chuàng)新導報;2012年12期

6 湯永明;;楊家壩水電站機組振動原因及處理[J];小水電;2012年02期

7 卓瑪窮達;;關(guān)于西藏正在興修水電站預防水輪機空化與空蝕技術(shù)探討[J];水電站機電技術(shù);2012年01期

8 黃立兵;;基于小波變換的水輪機振動診斷研究[J];水利科技與經(jīng)濟;2011年11期

9 陳定方;盧全國;梅杰;舒亮;劉坤;;Galfenol合金應用研究進展[J];中國機械工程;2011年11期

10 張貴林;;雙排布置單機容量400MW水輪發(fā)電機組的運行穩(wěn)定性分析[J];西北水電;2011年02期

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本文編號：2498662