本文選題：水輪機(jī) + 軸承　； 參考：《華北水利水電大學(xué)》2017年碩士論文

【摘要】：隨著現(xiàn)代水力發(fā)電技術(shù)的不斷進(jìn)步,大型與巨型水輪發(fā)電機(jī)組的應(yīng)用不斷增多,對電網(wǎng)的穩(wěn)定、安全、可靠運(yùn)行的影響日益增大,要求機(jī)組的運(yùn)行穩(wěn)定性必須得到保證。水輪發(fā)電機(jī)組的軸承系統(tǒng)是保證機(jī)組安全穩(wěn)定運(yùn)行的重要部件,在實(shí)際生產(chǎn)運(yùn)行過程中,因?yàn)闄C(jī)組偏心、軸承散熱系統(tǒng)油路循環(huán)不合理、潤滑油油質(zhì)劣化等因素引起軸承系統(tǒng)散熱不良、造成軸承瓦溫過高甚至燒損的現(xiàn)象時有發(fā)生,不僅直接影響了軸承的使用壽命,還給電力安全生產(chǎn)帶來了嚴(yán)重的威脅。本文就是在查閱大量技術(shù)文獻(xiàn)與水電站現(xiàn)場調(diào)研的基礎(chǔ)上,根據(jù)實(shí)際工程需要,采用現(xiàn)代流場分析Fluent軟件對水輪發(fā)電機(jī)組推力軸承內(nèi)循環(huán)冷卻系統(tǒng)內(nèi)部流場進(jìn)行研究,分析其速度、壓力、溫度的分布規(guī)律,為機(jī)組軸承油循環(huán)冷卻系統(tǒng)的結(jié)構(gòu)優(yōu)化設(shè)計(jì)與安全運(yùn)行提供技術(shù)幫助。主要研究內(nèi)容如下:1.建立軸承油循環(huán)冷卻系統(tǒng)中潤滑油運(yùn)動的數(shù)學(xué)模型,對數(shù)值模擬的基本方法以及研究過程中所用的軟件進(jìn)行了介紹,闡述了計(jì)算流體力學(xué)的求解過程。2.根據(jù)某電站水輪發(fā)電機(jī)推力軸承油循環(huán)冷卻系統(tǒng)的實(shí)際幾何尺寸,利用建模軟件SolidWorks建立三維幾何模型,采用ICEM軟件對計(jì)算域進(jìn)行網(wǎng)格劃分,并設(shè)置相應(yīng)的邊界條件。3.針對不同的瓦溫、油溫和水溫確定的工況,采用Fluent軟件計(jì)算推力軸承油槽內(nèi)油的速度、壓力和溫度分布。4.對不同工況下的計(jì)算結(jié)果進(jìn)行對比分析,找出其規(guī)律,為推力軸承油循環(huán)冷卻系統(tǒng)的結(jié)構(gòu)優(yōu)化和機(jī)組的安全穩(wěn)定運(yùn)行以及國內(nèi)其他一些類似水電站的安裝檢修提供參考。
[Abstract]:With the development of modern hydroelectric power generation technology, the application of large and giant hydroelectric generating units is increasing, and the influence on the stability, safety and reliability of the power grid is increasing day by day, which requires the operation stability of the units to be guaranteed. The bearing system of a hydrogenerator unit is an important part to ensure the safe and stable operation of the unit. In the actual operation process, because of the unit eccentricity, the oil circulation of the bearing heat dissipation system is unreasonable, The poor heat dissipation of bearing system caused by the deterioration of oil quality of lubricating oil causes the phenomenon that the bearing shoe temperature is too high or even burned. It not only directly affects the service life of bearing, but also brings serious threat to the safe production of electric power. On the basis of consulting a large number of technical documents and site investigation of hydropower stations, this paper studies the internal flow field of thrust bearing inner circulation cooling system of hydro-generator units by using fluent software according to the actual engineering needs. The distribution law of speed, pressure and temperature is analyzed, which provides technical help for structural optimization design and safe operation of bearing oil cycle cooling system. The main research contents are as follows: 1. The mathematical model of lubricating oil movement in the circulating cooling system of bearing oil is established. The basic method of numerical simulation and the software used in the research process are introduced, and the solution process of computational fluid mechanics. According to the actual geometry size of thrust bearing oil cycle cooling system of hydrogenerator in a power station, a three-dimensional geometric model is established by using SolidWorks, and the computational domain is meshed with ICEM software, and the corresponding boundary conditions .3are set up. According to the working conditions of different tile temperature, oil temperature and water temperature, the velocity, pressure and temperature distribution of oil in the tank of thrust bearing are calculated by fluent software. The results of calculation under different working conditions are compared and analyzed to find out the law, which provides a reference for the optimization of the structure of thrust bearing oil cycle cooling system and the safe and stable operation of the unit, as well as the installation and maintenance of other similar hydropower stations in China.
【學(xué)位授予單位】：華北水利水電大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TV734

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 王玲花;張楊;黃鑫;;加高擋風(fēng)墻對直接空冷系統(tǒng)流場的影響[J];熱力發(fā)電;2016年11期

2 ZHAI Liming;LUO Yongyao;WANG Zhengwei;LIU Xin;;3D Two-way Coupled TEHD Analysis on the Lubricating Characteristics of Thrust Bearings in Pump-turbine Units by Combining CFD and FEA[J];Chinese Journal of Mechanical Engineering;2016年01期

3 張奇;;600MW大型水輪發(fā)電機(jī)組推力軸承瓦溫和油溫高原因分析及處理[J];華電技術(shù);2015年10期

4 馮小燕;張楊;王海實(shí);;水輪發(fā)電機(jī)組推力軸承散熱研究[J];技術(shù)與市場;2015年07期

5 朱順財(cái);楊仕福;張?zhí)禊i;;溪洛渡右岸水電站水輪發(fā)電機(jī)推力軸承及油循環(huán)冷卻系統(tǒng)設(shè)計(jì)[J];東方電氣評論;2015年01期

6 鄭海軍;;淺談推力瓦的常見故障原因及處理[J];中國新技術(shù)新產(chǎn)品;2014年21期

7 劉琪;;水輪發(fā)電機(jī)組推力軸承技術(shù)的發(fā)展[J];黑龍江科學(xué);2014年03期

8 唐衛(wèi)東;曹凱;趙公杰;陳煥忠;;水布埡電廠3、4號機(jī)組推力軸承運(yùn)行情況分析[J];水電與新能源;2014年02期

9 張艷芹;陳瑤;范立國;李銳;;四種油腔形狀重型靜壓軸承承載性能理論分析[J];哈爾濱理工大學(xué)學(xué)報(bào);2013年02期

10 張金國;姚世衛(wèi);舒禮偉;疏舒;;推力瓦塊幾何參數(shù)對推力軸承潤滑性能的影響分析[J];艦船科學(xué)技術(shù);2009年12期

相關(guān)會議論文 前1條

1 武中德;張宏;;大型水輪發(fā)電機(jī)推力軸承設(shè)計(jì)[A];水電設(shè)備的研究與實(shí)踐——第十七次中國水電設(shè)備學(xué)術(shù)討論會論文集[C];2009年

相關(guān)博士學(xué)位論文 前1條

1 黃濱;推力軸承三維熱彈流潤滑性能及其振動噪聲特性研究[D];浙江大學(xué);2013年

相關(guān)碩士學(xué)位論文 前2條

1 何春勇;潛水泵水潤滑推力軸承潤滑性能數(shù)值計(jì)算研究[D];武漢理工大學(xué);2010年

2 盧德平;大型水輪發(fā)電機(jī)推力軸承油槽內(nèi)流場分析和結(jié)構(gòu)優(yōu)化[D];哈爾濱工業(yè)大學(xué);2010年

，

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