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    • 7. 发明公开
    • SEAL STRUCTURE AND ROTARY MACHINE
    • DICHTUNGSSTRUKTUR UND DREHMASCHINE
    • EP3078888A1
    • 2016-10-12
    • EP14867257.9
    • 2014-11-26
    • Mitsubishi Hitachi Power Systems, Ltd.
    • KUWAMURA, YoshihiroMATSUMOTO, KazuyukiOYAMA, HiroharuTANAKA, YoshinoriNISHIKAWA, ToyoharuUEHARA, HidekazuNISHIMOTO, Shin
    • F16J15/447F01D5/20F01D11/02F01D11/08F01D25/00F01D25/16F01D25/24F02C7/28F16J15/40
    • In a seal structure (2) that seals a gap (Gd) between a first structure (10) and a second structure (51) which faces the first structure (10) in a radial direction and rotates relative to the first structure (10) about an axis, one of the first structure (10) and the second structure (51) has a base surface (4) and a step surface (5) that protrudes toward the other side from the base surface (4), and the other is provided with: a first fin (18) which extends toward the step surface (5) and forms a first gap (mB) at a space with respect to the step surface (5); a second fin (19) that, on the downstream side of the first fin (18), extends toward the base surface (4) and forms a second gap (mC) at the space with respect to the base surface (4); and a protrusion part (7) that is disposed between the first fin (18) and the second fin (19) and that divides a leak flow (SL2) which has passed through the first gap (mB), into a first vortex (B3) along the first fin (18) and a second vortex (B4) along the second fin (19).
    • 在密封结构(2)中,其密封第一结构(10)和面向第一结构(10)的第二结构(51)之间的间隙(Gd),所述第一结构(10)和径向相对于第一结构(10)旋转, 围绕轴线,第一结构(10)和第二结构(51)中的一个具有从基部表面(4)向另一侧突出的基底表面(4)和台阶表面(5),而另一个 设置有:朝向台阶表面(5)延伸并在相对于台阶表面(5)的空间处形成第一间隙(mB)的第一翅片(18); 第二翅片(19),其在所述第一翅片(18)的下游侧朝向所述基部表面(4)延伸并且在所述空间处形成相对于所述基部表面(4)的第二间隙(mC); 以及突出部(7),其设置在所述第一翅片(18)和所述第二翅片(19)之间,并且将已经穿过所述第一间隙(mB)的泄漏流(SL2)分割成第一涡流(B3 )和沿着第二翅片(19)的第二涡流(B4)。