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    • 8. 发明授权
    • Nozzle box of axial flow turbine and axial flow turbine
    • 轴流涡轮喷嘴和轴流涡轮机
    • US08690532B2
    • 2014-04-08
    • US12714948
    • 2010-03-01
    • Yasunori IwaiTsutomu OoishiYoshiki NiizekiTaro Kawabata
    • Yasunori IwaiTsutomu OoishiYoshiki NiizekiTaro Kawabata
    • F01D9/02
    • F01D9/047F01D9/06F01D25/26F05D2210/43F05D2240/128F05D2250/20
    • A nozzle box 10 includes: a lead-in pipe 20; a bent pipe 30 connected to the lead-in pipe 20 and formed so as to change a direction of a channel center line 50 to an axial direction of a turbine rotor 212; and an annular pipe 40 connected to the bent pipe 30 and leading steam to a first-stage nozzle 213a while spreading the steam in a circumferential direction of the turbine rotor 212. In the steam channel lead-in part structure 10, from an inlet of the lead-in pipe 20 toward an outlet of the annular pipe 40, steam channel widths Sa-1 to Sn-1 in a first direction intersecting with the channel center line 50 gradually increases and steam channel widths Sa-2 to Sn-2 in a second direction intersecting with the channel center line 50 and perpendicular to the first direction gradually decreases.
    • 喷嘴箱10包括:引入管20; 连接到引入管20并形成为使得通道中心线50的方向相对于涡轮转子212的轴向改变的弯管30; 以及环形管40,连接到弯管30,并将蒸汽引导到第一级喷嘴213a,同时沿涡轮转子212的圆周方向扩展蒸汽。在蒸汽通道引入部分结构10中,从蒸汽通道引入部分结构10的入口 朝向环形管40的出口的导入管20,与通道中心线50交叉的第一方向的蒸气通道宽度Sa-1〜Sn-1逐渐增大,蒸汽通道宽度Sa-2〜Sn-2在 与通道中心线50相交并垂直于第一方向的第二方向逐渐减小。