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    • 8. 发明授权
    • Device for varying the section of the throat in a turbine nozzle
    • 用于改变涡轮喷嘴中喉部的部分的装置
    • US07553126B2
    • 2009-06-30
    • US11355884
    • 2006-02-17
    • Gilles Alain Marie CharierClaude Daniel NottinStephane Rousselin
    • Gilles Alain Marie CharierClaude Daniel NottinStephane Rousselin
    • F01D9/00
    • F01D17/141F01D17/14F05D2300/50212
    • A device for varying the section of the throat of a turbine nozzle, the nozzle being formed by a plurality of stationary vanes extending radially between outer and inner annular platforms and spaced apart from one another in order to define a throat presenting a minimum flow section. The device comprises an annular element having a coefficient of expansion that is less than that of the platforms of the nozzle, the annular element being secured to the outer platform and being capable of taking up two positions: one position corresponding to no expansion of the platforms, in which the element provides continuity for the profile of the flow passage; and another position corresponding to the platforms having expanded, in which position the element projects into the flow passage so as to reduce its section.
    • 一种用于改变涡轮喷嘴喉部的部分的装置,该喷嘴由多个固定叶片形成,该固定叶片在外环形平台和内环形平台之间径向延伸并且彼此间隔开,以便限定呈现最小流动部分的喉部。 该装置包括具有比喷嘴平台的膨胀系数小的膨胀系数的环形元件,环形元件固定到外平台并且能够占据两个位置:对应于不平台的膨胀的一个位置 ,其中所述元件为所述流动通道的轮廓提供连续性; 并且对应于已经膨胀的平台的另一位置,元件在该位置突出到流动通道中以便减小其截面。