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    • 49. 发明授权
    • Wicket gate
    • 小门
    • US5228830A
    • 1993-07-20
    • US627341
    • 1990-12-14
    • Joseph Pastore
    • Joseph Pastore
    • F03B3/18
    • F03B3/183F05B2230/90F05B2280/4003Y02E10/223Y02P70/525Y10T29/49337
    • This invention relates to an improvement in an apparatus for directing the flow of water from the penstock to the vanes of a hydraulic turbine, generally referred to as a wicket gate, and a method for making the improved wicket gate. The improved wicket gate comprises a rotatable planar body made either of a high-strength plastic material or metal, onto which a viscoelastic material is affixed. The improvement lies in the application of the viscoelastic material to the rotatable planar body in such a way that the viscoelastic material becomes an integral component of the rotatable planar body. This improvement extends the maintenance life cycle by reducing marine growth, erosion and pitting caused by cavitation.
    • 本发明涉及用于将水从水管引导到水轮机的叶片(通常称为小门)的装置的改进以及用于制造改进的小门的方法。 改进的门板门包括由高强度塑料材料或金属制成的可旋转平面体,粘合有粘弹性材料。 改进在于将粘弹性材料应用于可旋转平面体,使得粘弹性材料成为可旋转平面体的整体部件。 这种改进通过减少由气蚀导致的海洋生长,侵蚀和点蚀延长了维护生命周期。