本文選題：中型高壓異步電動機 + 流體場��； 參考：《哈爾濱理工大學》2015年碩士論文

【摘要】：20世紀90年代，我國設計了YKK系列中型高壓感應電動機，它具有高效、節(jié)能、噪聲低、振動小、性能可靠等優(yōu)點。它可以驅動通風機、壓縮機、水泵、破碎機、切削機床等其他機械，也可以作為原動機廣泛的應用于煤礦、機械工業(yè)、發(fā)電廠及各種工礦企業(yè)中。由于這種封閉式交流異步電機的結構較為復雜，故溫升一直是該電機運行時需要關注的重點問題之一。 YKK系列中型高壓異步電動機的冷卻系統(tǒng)采用了軸徑向混合通風的方式，在電機內部分布著徑向通風溝，電機運行時旋轉的轉子導致通風溝內流體的流動情況非常復雜。在實際計算中，大部分人選擇對通風溝內流體的流動進行簡化，這種處理方法雖然便捷了計算，但得到的結果卻與實際情況有比較大的偏差，大大降低了溫度場計算的準確性。 本文分析了YKK系列電機通風冷卻系統(tǒng)的特點，以一臺YKK450-4、500kW中型高壓異步電動機為例，，依據電機實際結構的尺寸，建立了內風路流體場的物理模型；基于流體力學和傳熱學理論對電機的實際運行情況進行分析，給出適合的假設條件及邊界條件；對電機內流體場進行仿真計算，得到了計算區(qū)域的流體場、壓力分布云圖及每個通風溝內的流量分布；采用流體場溫度場耦合的算法對電機內部的溫度場進行分析計算；重新對改變通風槽鋼、通風槽管安裝位置的通風溝進行建模，得到幾種不同情況下電機內部的溫度場分布。 本文較為準確的計算出電機穩(wěn)定運行時其內部的流體場與溫度場的分布情況，仿真結果與實驗數據的對比證明了計算模型的合理性及準確性，同時對通風槽鋼的安裝位置提出了改進建議，研究結果為提高電機的散熱性能、優(yōu)化電機的通風結構提供了理論依據。
[Abstract]:In the 1990s, YKK series medium high voltage induction motors were designed in China. It has the advantages of high efficiency, energy saving, low noise, low vibration, reliable performance and so on. It can drive fans, compressors, pumps, crushers, cutting machines and other machinery, but also can be used as prime movers in coal mines, mechanical industry, power plants and various industrial and mining enterprises. Because the structure of this closed AC asynchronous motor is more complex, Therefore, temperature rise has always been one of the most important problems in the operation of the motor. The cooling system of YKK series medium high voltage asynchronous motor adopts axial and radial mixed ventilation, and the radial ventilation ditch is distributed inside the motor. The flow of fluid in the ventilation ditch is very complicated due to the rotating rotor when the motor is running. In the actual calculation, most people choose to simplify the flow of fluid in the ventilation ditch. Although this treatment method is convenient to calculate, the results obtained are quite different from the actual situation, which greatly reduces the accuracy of the calculation of temperature field. The characteristics of ventilation cooling system of YKK series motors are analyzed in this paper. Taking a YKK 450-4500kW medium high voltage asynchronous motor as an example, the physical model of the fluid field in the inner air path is established according to the size of the actual structure of the motor. Based on the theory of fluid mechanics and heat transfer, the actual operation of the motor is analyzed, and the suitable hypothetical conditions and boundary conditions are given, the fluid field in the motor is simulated and the fluid field in the calculation area is obtained. Pressure distribution cloud diagram and flow distribution in each ventilation ditch; analysis and calculation of internal temperature field of motor using fluid field temperature field coupling algorithm; modeling of ventilation ditch with changing ventilation channel steel and installation position of ventilation groove pipe, The temperature field distribution inside the motor is obtained under several different conditions. In this paper, the distribution of fluid field and temperature field inside the motor is calculated accurately when the motor is running stably. The comparison between the simulation results and the experimental data proves the rationality and accuracy of the calculation model. At the same time, suggestions for improving the installation position of the ventilation channel steel are put forward. The research results provide a theoretical basis for improving the heat dissipation performance of the motor and optimizing the ventilation structure of the motor.
【學位授予單位】：哈爾濱理工大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TM343

【參考文獻】

相關期刊論文 前8條

1 李德基,白亞民,王紹禹;絕緣老化對定子溫升的影響[J];大電機技術;1988年06期

2 韓力,李輝,馬輝,嚴欣平;大型燈泡貫流式水輪發(fā)電機的通風與溫升[J];大電機技術;2000年05期

3 張大為;湯蘊t

本文編號：2085988