关于水轮机蜗壳结构不平衡水推力初步研究
Northwest Hydropower(2010)
Abstract
为研究内水压力作用下水轮机蜗壳产生的不平衡水推力,采用裸壳和三维实际结构2种计算模型进行有限元计算分析。结果表明:进口附近有伸缩节无止推环的保压蜗壳在运行期座环要承担较大不平衡水推力的受力状态与施工期受力状态有较大差别;垫层蜗壳蜗向局部设垫层时,座环承担的不平衡水推力明显大于垫层全包时的不平衡水推力。应重视不平衡水推力的不利影响。
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Key words
turbine,unbalanced hydraulic thrust,soft cushion layer,water filling for a certain head,spiral case
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