The utility model discloses a spiral case structure of a water turbine, which has the characteristics of improving the running reliability of a hydraulic turbine unit. The turbine volute structure, including turbine shell and laying in the cushion layer of turbine volute surface, in the layout of turbine spiral case, between the zero section end section to the turbine spiral case of cushion layer of the angle of 150 degrees, the end section, the zero section through the center of the volute turbine volute. The structure between the cushion layer (in the volute surface cushion between the volute and buried), by laying range adjustment cushion layer, can minimize cushion aging and residual plastic deformation adverse effects on the operation of the unit, as well as to prevent cracking of reinforced concrete, to ensure the long-term safety unit stable operation, especially suitable for application in a variety of large-scale hydraulic turbine of a hydropower station.
【技术实现步骤摘要】
【技术保护点】
１．水轮机蜗壳结构，包括水轮机蜗壳（１）以及铺设在水轮机蜗壳（１）表面的软垫层（２），其特征是：在水轮机蜗壳（１）的布置平面内，软垫层（２）的末端断面（４）至水轮机蜗壳（１）的零位断面（３）之间所夹的角度为１５０度，所述末端断面（４）、零位断面（３）均通过水轮机蜗壳（１）的蜗壳中心。
【技术特征摘要】
【专利技术属性】
技术研发人员：王仁坤，李杰，肖平西，赵晓峰，侯攀，胡晓文，范湘蓉，赵群章，袁泉，
申请(专利权)人：中国水电顾问集团成都勘测设计研究院，
类型：实用新型
国别省市：90
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