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基于板壳力学的蒸发冷却电机用薄壁套筒分析及相关实验研究

Analysis of the Sleeve Cylinder Used in Immersing Evaporation Cooling Motors Based on Mechanics of Thin Plates and Shells and Concerning Experiments

【作者】 谭丹丹

【导师】 熊楠;

【作者基本信息】 中国科学院研究生院(电工研究所) , 电机与电器, 2004, 硕士

【摘要】 浸润式蒸发冷却是一种新型的冷却方式,其优越性在于冷却效果好、效率高、运行安全等方面。本文首次将板壳力学理论引入蒸发冷却技术的研究领域,对浸润式蒸发冷却电机所采用的薄壁密封套筒的应力、应变分布进行了分析,解决了小空间尺度和小气隙的条件下,所必须解决的薄壁密封套筒应力应变问题。对蒸发冷却技术的推广具有重大应用价值,对完善蒸发冷却技术相关理论也具有重要意义。 本文在套筒材料的均匀连续性、各向同性的假设下,针对薄壁密封套筒结构的特殊性,引入板壳力学理论分析其受压变形情况,推导了其变形位移量的计算公式。通过有限元分析的方法,对薄壁密封套筒在电机工作情况下的受热状态进行了二维的热应力和热变形仿真计算;在对薄壁密封套筒承受轴对称外压的等效前提下,对其产生的变形位移量进行了仿真计算。 为了验证计算结果,利用组内一台定子浸润式蒸发冷却异步发电机的定子模型,对于定子密封套筒进行了试验,测量了在不同压强下套筒的椭圆度,并与理论计算结果作比较得到了相同的变化规律,分析了试验结果与计算结果之间存在误差的原因。

【Abstract】 Immersing evaporation cooling is a kind of new cooling technique with high efficiency and safety. In this paper, mechanics of thin plates and shells is used in the field of the evaporation cooling technology for the first time. Stress and translation of sleeve cylinder used in immersing evaporation cooling motors are analyzed under the condition of small dimension and air-gap of the motor. It has significance of the evaporation cooling technology’s correlative theories.Under the assumption of the equality and isotropy of the sleeve cylinder’s material, mechanics of thin plates and shells is used to analyze the deformed condition of the sleeve cylinder. The characteristic of its structure is under consideration, and the deformed displacement is calculated. With the method of finite element analysis, the simulation of 2-D thermal-stress and translation of the thin sleeve cylinder is performed, and the simulation of its deformed displacement is performed under the equivalent axis-symmetrical pressure.The experiment of the stator"s sleeve cylinder is carried out with a modal of the evaporation cooling asynchronous turbogenerator. The inner diameter of the thin sleeve cylinder is measured under different pressure. Experiment result shows that the deformed displacement is almost agreement with the calculation results. The error between the experiment result and calculation is discussed.

  • 【分类号】TM303
  • 【下载频次】113
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