【摘要】：隨著電力需求的增長,水電站發(fā)電機(jī)組也越來越多,維持其在一個(gè)穩(wěn)定安全的運(yùn)行狀態(tài)就尤為重要。因?yàn)檎駝?dòng)會對水輪機(jī)組的平穩(wěn)正常運(yùn)行造成很大的影響,甚至影響使用壽命,造成運(yùn)行成本的提高。所以,在水電站中對水輪機(jī)組的振動(dòng)檢測是相當(dāng)重要的。振動(dòng)傳感器作為采集振動(dòng)信息的部件,其性能優(yōu)劣對于振動(dòng)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(yīng)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(dòng)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(dòng)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(qiáng),靈敏度高、體積小等優(yōu)點(diǎn)。本文工作的主要內(nèi)容為:1、對懸臂梁進(jìn)行應(yīng)力應(yīng)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(gè)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(jìn)行實(shí)驗(yàn)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(jìn)行感應(yīng)電壓模型分析,根據(jù)需要搭建實(shí)驗(yàn)檢測平臺,測量懸臂梁在磁場作用下的撓度;根據(jù)實(shí)驗(yàn)數(shù)據(jù)分析計(jì)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(shí)不考慮漏磁等干擾因素,根據(jù)線性關(guān)系可知此時(shí)懸臂梁磁感應(yīng)的動(dòng)態(tài)變化值將會達(dá)到數(shù)特斯拉(T),計(jì)算知產(chǎn)生的感應(yīng)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(xué)位授予單位】：南昌工程學(xué)院
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TV736

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本文編號：2498662