汽轮发电机转子绕组开放管道式蒸发冷却技术的实验研究

Experimental research of open channel evaporative cooling of turbo generator's rotor windings

为了将蒸发冷却技术应用于大容量的汽轮发电机,需要对转子蒸发冷却技术进行深行研究。本文重点介绍了汽轮发电机转子绕组开放管道式蒸发冷却技术的模拟实验。阐述了实验原理、模型的建立以及数据的采集等问题,并对结果进行了详细的分析。实验结果表明,开放管道式转子线圈半径方向上的温度分布均匀,完全符合汽轮发电机的冷却技术要求。在不同的工况条件下,系统均表现出了良好的冷却能力。该实验为采用开放管道式转子绕组蒸发冷却方式的大容量汽轮发电机的设计和计算提供了依据,其结果也可为离心力场下的液体流动和传热方面的研究借鉴。

In order to apply evaporative cooling technology to large capacity turbo generator, evaporative cooling technology of rotor needs thorough research. This paper introduces the simulating experiment of open channel evaporative cooling of turbo generator＇s rotor windings, stating the theory of experiment and construction of experimental model and acquiring of data, and analyzing the results in detail. The aim of experiment is to obtain the temperature distribution of open channel rotor winding. The results indicated an even temperature distribution in radial direction. That completely conformed with the cooling specification of turbo generator. Under different working conditions, the system showed great cooling ability. This experiment provided basis for the design and computation of large capacity turbo generators which adopted open channel evaporative cooling technology of rotor winding and had certain guiding significance to the next step of experimental work. This experiment also provided experimental basis to the research of fluid flow and heat transfer under centrifugal force.