發(fā)布時(shí)間：2018-04-13 06:29

  本文選題：旋轉(zhuǎn)機(jī)械 + 振動(dòng)��； 參考：《東南大學(xué)》2015年碩士論文

【摘要】：振動(dòng)是影響汽輪發(fā)電機(jī)組等各類旋轉(zhuǎn)機(jī)械安全穩(wěn)定運(yùn)行的主要因素,轉(zhuǎn)子不平衡是旋轉(zhuǎn)機(jī)械最常見的振動(dòng)故障,研究高效、高精度動(dòng)平衡試驗(yàn)方法具有重要意義。建立了汽輪發(fā)電機(jī)組高中壓轉(zhuǎn)子有限元分析模型,分析了外力作用下轉(zhuǎn)軸彎曲變形情況。研究結(jié)果表明,柔性轉(zhuǎn)子動(dòng)平衡時(shí),如果配重面與不平衡面不重合,會(huì)造成轉(zhuǎn)子彎曲變形。彎曲變形會(huì)產(chǎn)生新的不平衡力,破壞轉(zhuǎn)軸原先的平衡狀態(tài),并導(dǎo)致轉(zhuǎn)子振動(dòng)爬升,解釋了發(fā)生在大型汽輪發(fā)電機(jī)組上的不穩(wěn)定振動(dòng)現(xiàn)象。為了降低配重面與不平衡面不重合所帶來的不穩(wěn)定振動(dòng),建立了基于應(yīng)變的多輪盤不平衡力識(shí)別方法,該法可以準(zhǔn)確檢測(cè)每一個(gè)輪盤處的不平衡力。該法認(rèn)為旋轉(zhuǎn)坐標(biāo)系下轉(zhuǎn)子不平衡力的大小和方向?yàn)槌Ａ?可以通過檢測(cè)同步旋轉(zhuǎn)狀態(tài)下轉(zhuǎn)軸截面彎矩變化來識(shí)別不平衡力。轉(zhuǎn)軸截面彎矩變化可以用應(yīng)變測(cè)試技術(shù)求得。在轉(zhuǎn)子—軸承試驗(yàn)臺(tái)上對(duì)該不平衡識(shí)別方法的準(zhǔn)確度和可靠性進(jìn)行了試驗(yàn)驗(yàn)證,設(shè)計(jì)了試驗(yàn)方案,并開展了系列試驗(yàn),包括：?jiǎn)屋啽P/多輪盤轉(zhuǎn)子系統(tǒng)在不同轉(zhuǎn)速以及不同平衡狀態(tài)下的質(zhì)量識(shí)別、角度識(shí)別、不平衡分布識(shí)別等。初步驗(yàn)證了該方法的可行性。
[Abstract]:Vibration is the main factor that affects the safe and stable operation of all kinds of rotating machinery, such as turbine-generator sets. Rotor unbalance is the most common vibration fault of rotating machinery. It is of great significance to study the high-efficiency and high-precision dynamic balance test method.The finite element analysis model of high pressure rotor of turbine-generator set is established, and the bending deformation of rotating shaft under external force is analyzed.The results show that the bending deformation of the rotor will be caused if the counterweight surface does not coincide with the unbalanced surface during the dynamic balancing of the flexible rotor.The bending deformation will produce new unbalanced force, destroy the original balance state of the shaft, and cause the rotor vibration to climb, which explains the unstable vibration phenomenon that occurs on the large turbogenerator set.In order to reduce the unstable vibration caused by the mismatch between the counterweight surface and the unbalanced surface, a strain based multi-disc unbalance force identification method is established, which can accurately detect the unbalanced force at each wheel disc.It is considered that the magnitude and direction of rotor unbalance force in rotating coordinate system are constant, and the unbalance force can be identified by detecting the change of cross-section bending moment in synchronous rotation state.The variation of the bending moment of the axial section can be obtained by strain measurement technique.The accuracy and reliability of the unbalance recognition method are tested on the rotor-bearing test bed. The test scheme is designed and a series of tests are carried out.It includes: single wheel / multi disk rotor system quality recognition, angle recognition and unbalanced distribution recognition under different rotational speed and different balance state.The feasibility of the method is preliminarily verified.
【學(xué)位授予單位】：東南大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TM311;TM307

【相似文獻(xiàn)】

相關(guān)期刊論文 前9條

1 楊強(qiáng),陳新,周維垣,楊若瓊;三維彈塑性有限元計(jì)算中的不平衡力研究[J];巖土工程學(xué)報(bào);2004年03期

2 聶君臣;范子杰;;摩托車汽油機(jī)不平衡力幅值的研究[J];小型內(nèi)燃機(jī)與摩托車;2006年06期

3 闞遠(yuǎn);葉繼紅;;索穹頂結(jié)構(gòu)的找力分析方法——不平衡力迭代法[J];應(yīng)用力學(xué)學(xué)報(bào);2006年02期

4 劉小剛;王新倫;;CKY-200型土工離心機(jī)研制[J];機(jī)械設(shè)計(jì)與制造;2012年06期

5 田立新;;利用SolidWorks軟件添加配重[J];金屬加工(冷加工);2009年02期

6 陳磊;;機(jī)組空載振動(dòng)過大的原因分析及處理方法[J];新疆有色金屬;2013年01期

7 韓福桂;;國(guó)外怎樣監(jiān)測(cè)和消除轉(zhuǎn)機(jī)的振動(dòng)[J];化工與通用機(jī)械;1981年01期

8 余謙;用轉(zhuǎn)子重心偏移計(jì)算法求動(dòng)平衡[J];南昌水專學(xué)報(bào);1994年01期

9 ;[J];;年期

相關(guān)碩士學(xué)位論文 前3條

1 張曉斌;多輪盤轉(zhuǎn)子系統(tǒng)不平衡力識(shí)別方法研究[D];東南大學(xué);2015年

2 康燁;前后壓差對(duì)調(diào)節(jié)閥不平衡力的影響[D];寧夏大學(xué);2014年

3 王銘升;介質(zhì)流向?qū)φ{(diào)節(jié)閥不平衡力及流速的影響[D];寧夏大學(xué);2014年

，

本文編號(hào)：1743298