發(fā)布時間：2018-04-01 17:25

  本文選題：中小型　切入點(diǎn)：燈泡貫流式水輪發(fā)電機(jī)　出處：《重慶理工大學(xué)》2017年碩士論文

【摘要】：開發(fā)和利用低水頭及超低水頭的水力資源,中小型燈泡貫流式水輪發(fā)電機(jī)組是最佳的機(jī)組型式。由于中小型燈泡貫流式水輪發(fā)電機(jī)組受制于安裝空間和結(jié)構(gòu)形式,相較于其它類型的水力發(fā)電機(jī),隨著單機(jī)容量的不斷提高,其結(jié)構(gòu)更緊湊,通風(fēng)散熱條件更差,各部件溫升更高,嚴(yán)重影響發(fā)電機(jī)的正常使用壽命和運(yùn)行的可靠性。因此,在發(fā)電機(jī)設(shè)計、制造過程中,需要準(zhǔn)確計算和分析發(fā)電機(jī)的溫度場分布。然而,以往在計算發(fā)電機(jī)熱源損耗及其內(nèi)部溫度時主要依靠傳統(tǒng)公式和設(shè)計經(jīng)驗,無法準(zhǔn)確描述發(fā)電機(jī)內(nèi)溫度場分布。本研究以某一型號中小型燈泡貫流式水輪發(fā)電機(jī)為研究對象,利用數(shù)值模擬方法,從熱源損耗、多物理耦合場和通風(fēng)散熱結(jié)構(gòu)優(yōu)化的角度對發(fā)電機(jī)溫度場展開了計算和分析。首先,根據(jù)發(fā)電機(jī)基本結(jié)構(gòu)尺寸生成二維幾何模型;建立了二維電磁場有限元分析模型并確定了發(fā)電機(jī)試驗工況和額定工況下的勵磁參數(shù)和邊界條件;利用有限元法分別計算了發(fā)電機(jī)定子原結(jié)構(gòu)和兩種改造結(jié)構(gòu)的時均鐵耗分布。其次,根據(jù)傳熱學(xué)、計算流體動力學(xué)以及多物理場耦合理論,建立了發(fā)電機(jī)熱流耦合溫度場數(shù)值計算三維模型;以電磁場有限元計算得到的定子時均鐵耗以及UDF編程得到定轉(zhuǎn)子銅耗為熱源,計算了發(fā)電機(jī)在試驗工況下的溫度場;結(jié)合現(xiàn)場實測數(shù)據(jù),驗證了所施加邊界條件的準(zhǔn)確性;對額定工況下發(fā)電機(jī)的溫度場進(jìn)行了計算分析并討論了入口冷卻風(fēng)速大小和定子有無軛部通風(fēng)孔對發(fā)電機(jī)各部件溫升的影響;對發(fā)電機(jī)定子通風(fēng)散熱結(jié)構(gòu)提出了增設(shè)齒部通風(fēng)槽、增大定子線圈截面、適當(dāng)減少定子軛部通風(fēng)孔的優(yōu)化改進(jìn)措施并分別進(jìn)行了數(shù)值計算和數(shù)據(jù)對比分析。最后,基于優(yōu)化設(shè)計理論,運(yùn)用DOE實驗設(shè)計方法對發(fā)電機(jī)定子通風(fēng)散熱結(jié)構(gòu)參數(shù)(定子軛部通風(fēng)孔、定子齒部通風(fēng)槽的大小、位置共四個參數(shù))進(jìn)行了優(yōu)化設(shè)計;最終獲得了定子通風(fēng)散熱的結(jié)構(gòu)最優(yōu)參數(shù),進(jìn)一步降低了定子線圈最高溫升。論文通過對發(fā)電機(jī)熱流耦合溫度場的研究,旨在利用有限元數(shù)值計算方法得到發(fā)電機(jī)內(nèi)部的溫度場分布,提高研發(fā)能力。數(shù)值計算結(jié)果與實際測量結(jié)果的對比數(shù)據(jù)表明,利用熱流耦合數(shù)值計算方法得到的發(fā)電機(jī)定轉(zhuǎn)子溫度場具有一定準(zhǔn)確性和真實性,能夠為實際工程應(yīng)用提供設(shè)計依據(jù)。
[Abstract]:For the development and utilization of low and ultra-low water head hydraulic resources, the small and medium-sized bulb tubular turbine generator is the best type of unit. Because the medium and small bulb tubular turbine generator sets are subject to the installation space and structure, Compared with other types of hydraulic generators, with the continuous increase of the single unit capacity, its structure is more compact, the ventilation and heat dissipation conditions are worse, and the temperature rise of the components is higher, which seriously affects the normal service life and the reliability of the generator. In the process of generator design and manufacture, it is necessary to accurately calculate and analyze the temperature field distribution of the generator. However, in the past, the traditional formula and design experience were used to calculate the heat source loss and internal temperature of the generator. The temperature field distribution in the generator can not be accurately described. In this study, a small and medium-sized bulb tubular hydrogenerator is used as the research object, and the loss of heat source is obtained by using numerical simulation method. The temperature field of generator is calculated and analyzed from the angle of multi-physical coupling field and optimization of ventilation heat dissipation structure. Firstly, the two-dimensional geometric model is generated according to the basic structure size of generator. The finite element analysis model of two-dimensional electromagnetic field is established and the excitation parameters and boundary conditions of generator under test and rated conditions are determined. Using finite element method, the time-averaged iron consumption distributions of the original structure of generator stator and the two modified structures are calculated, respectively. Secondly, according to the theory of heat transfer, computational fluid dynamics and multi-physical field coupling, A three-dimensional model for the coupled heat flow temperature field of the generator is established, and the temperature field of the generator under the test condition is calculated by using the finite element calculation of the electromagnetic field and the copper consumption of the stator and rotor obtained by UDF programming. The accuracy of the applied boundary conditions is verified by the field measured data. The temperature field of the generator under rated working conditions is calculated and analyzed, and the influence of inlet cooling wind speed and stator yoke vent on the temperature rise of generator components is discussed. For the ventilation and heat dissipation structure of generator stator, the author puts forward the optimization and improvement measures of adding teeth ventilation slot, increasing stator coil section, appropriately reducing ventilation holes in stator yoke, and carries out numerical calculation and data comparison and analysis respectively. Based on the theory of optimal design, the structural parameters of generator stator ventilation and heat dissipation (stator yoke ventilation hole, stator tooth ventilation slot size and position) are optimized by using DOE experimental design method. Finally, the optimal structural parameters of stator ventilation and heat dissipation are obtained, and the maximum temperature rise of stator coil is further reduced. The purpose of this paper is to obtain the temperature field distribution inside the generator by using finite element numerical method, and to improve the R & D capability. The comparison between the numerical calculation results and the actual measurement results shows that, The temperature field of generator stator and rotor obtained by the coupled heat flow numerical calculation method has certain accuracy and authenticity, which can provide the design basis for practical engineering application.
【學(xué)位授予單位】：重慶理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TM312

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 宋麗莉;朱海榮;李慶;;基于DOE的柴油機(jī)曲軸優(yōu)化設(shè)計研究[J];礦山機(jī)械;2013年06期

2 凌文星;;電機(jī)溫升分析研究[J];機(jī)電技術(shù);2010年03期

3 鄭發(fā)平;宋文武;李建秀;;燈泡貫流式水輪發(fā)電機(jī)通風(fēng)冷卻的計算研究[J];西昌學(xué)院學(xué)報(自然科學(xué)版);2009年01期

4 秦光宇;安志華;;燈泡式水輪發(fā)電機(jī)通風(fēng)冷卻及溫升計算研究[J];大電機(jī)技術(shù);2008年02期

5 李偉力;靳慧勇;丁樹業(yè);熊斌;;大型同步發(fā)電機(jī)定子多元流場與表面散熱系數(shù)數(shù)值計算與分析[J];中國電機(jī)工程學(xué)報;2005年23期

6 曾明富,錢昌燕,孫媛媛;桐子壕電站40MW燈泡貫流式水輪發(fā)電機(jī)組的研制[J];東方電氣評論;2005年03期

7 安志華,劉雙,金波,姜麗輝;燈泡式水輪發(fā)電機(jī)通風(fēng)冷卻系統(tǒng)設(shè)計方法[J];大電機(jī)技術(shù);2005年05期

8 徐立佳;;洪江水電站燈泡式發(fā)電機(jī)選型設(shè)計[J];珠江現(xiàn)代建設(shè);2003年01期

9 葉凡,劉大為;江口電站燈泡貫流式水輪發(fā)電機(jī)設(shè)計[J];大電機(jī)技術(shù);2001年02期

10 李廣德,付剛,何文秀;大型水輪發(fā)電機(jī)定子三維溫度場計算[J];大電機(jī)技術(shù);2000年02期

相關(guān)博士學(xué)位論文 前4條

1 胡田;空—空冷中型電機(jī)的流體場與溫度場研究[D];沈陽工業(yè)大學(xué);2016年

2 丁樹業(yè);大型發(fā)電機(jī)定子復(fù)雜結(jié)構(gòu)內(nèi)流體流動與傳熱特性的研究[D];哈爾濱理工大學(xué);2008年

3 韓力;大型水輪發(fā)電機(jī)損耗、發(fā)熱與通風(fēng)問題研究[D];重慶大學(xué);2008年

4 那艷玲;地鐵車站通風(fēng)與火災(zāi)的CFD仿真模擬與實驗研究[D];天津大學(xué);2004年

相關(guān)碩士學(xué)位論文 前10條

1 冉慶凱;大型電力變壓器磁熱耦合計算的研究[D];華北電力大學(xué);2015年

2 張勇;混合動力汽車動力耦合模塊電機(jī)定子溫度場分析與實驗驗證[D];合肥工業(yè)大學(xué);2015年

3 侯健;YKK系列中型高壓電機(jī)流體場與溫度場的計算分析[D];哈爾濱理工大學(xué);2015年

4 王寧;大型水輪發(fā)電機(jī)三維渦流—溫度耦合場數(shù)值計算[D];浙江大學(xué);2014年

5 劉飛;船用發(fā)電機(jī)多物理場耦合數(shù)值分析[D];江蘇科技大學(xué);2013年

6 張婷婷;燈泡貫流式水電站廠房結(jié)構(gòu)振動特性研究[D];天津大學(xué);2012年

7 申劍;大型燈泡貫流泵機(jī)組電機(jī)通風(fēng)冷卻研究[D];揚(yáng)州大學(xué);2011年

8 張沛;1000MW全空冷水輪發(fā)電機(jī)電磁場及溫度場數(shù)值計算[D];哈爾濱理工大學(xué);2011年

9 謝李丹;直驅(qū)式風(fēng)力永磁同步發(fā)電機(jī)損耗與發(fā)熱計算[D];重慶大學(xué);2010年

10 楊雪峰;大型空冷汽輪發(fā)電機(jī)定子內(nèi)流體場與溫度場計算與分析[D];哈爾濱理工大學(xué);2009年

，

本文編號：1696585