公开(公告)号：US5326221A

公开(公告)日：1994-07-05

申请号：US112365

申请日：1993-08-27

申请人： Joseph W. Amyot ,  Stephen G. Ruggles ,  Philip F. Berrahou ,  Robert J. Orlando

发明人： Joseph W. Amyot ,  Stephen G. Ruggles ,  Philip F. Berrahou ,  Robert J. Orlando

IPC分类号： F01D5/14 ,  F01D9/02

CPC分类号： F01D5/141 ,  F01D5/145 ,  F05D2240/301

摘要： Steam turbine nozzle blades and buckets are profiled in accordance with Tables I and II or multiples of the X,Y and R coordinates of the charts. The profiles of the nozzle blades impose a parabolic flow distribution at the throat and the buckets accommodate the incoming flow. The nozzle blades and buckets are over-cambered at their roots and tips to constrict flow from the roots and tips into the mid-regions of the blades and buckets. Improved aerodynamic efficiencies are obtained by directing the flow away from the end walls of the blades and buckets toward the efficient mid-region of the blades and buckets whereby flow velocity and angle leaving the nozzle has a non-linear distribution and the bucket velocity leaving angles are similarly non-linear.

摘要翻译： 蒸汽涡轮喷嘴刀片和铲斗根据表I和II或图表的X，Y和R坐标的倍数进行分析。 喷嘴叶片的轮廓在喉部施加抛物线流动分布，并且桶适应进入的流动。 喷嘴刀片和铲斗在其根部和尖端处过弧，以收缩从根部和尖端到叶片和铲斗的中间区域的流动。 通过将流动从叶片和铲斗的端壁引导到叶片和铲斗的有效中间区域获得改进的空气动力学效率，由此离开喷嘴的流速和角度具有非线性分布，并且铲斗速度离开角度 类似地是非线性的。