公开(公告)号：US06517314B1

公开(公告)日：2003-02-11

申请号：US09985638

申请日：2001-11-05

申请人： Mark Edward Burnett ,  Norman Arnold Turnquist ,  Christopher Edward Wolfe ,  Bruce William Brisson ,  Fredrick George Baily ,  David Alan Caruso

发明人： Mark Edward Burnett ,  Norman Arnold Turnquist ,  Christopher Edward Wolfe ,  Bruce William Brisson ,  Fredrick George Baily ,  David Alan Caruso

IPC分类号： F01D1100

CPC分类号： F01D11/001 ,  F05D2240/56 ,  F16J15/3288

摘要： In a steam turbine, a combined brush and labyrinth seal is provided between a diaphragm web and axial projecting platforms on bucket dovetails at a location spaced radially outwardly of the outer diameter of the rotor. The downstream axially adjacent bucket dovetails also have platforms serving as complementary sealing surfaces to labyrinth teeth formed on the web. By locating the combined labyrinth and brush seal radially outwardly of the outer diameter of the shaft, thermal bowing of the rotor is eliminated. By providing backup labyrinth seals at the same radial location, axial thrust loads are eliminated in the event of brush seal failure.

摘要翻译： 在蒸汽涡轮机中，组合的刷子和迷宫式密封件设置在隔膜腹板和铲斗燕尾形的轴向突出平台之间，位于与转子外径径向向外的位置处。 下游轴向相邻的铲斗燕尾形还具有用作形成在腹板上的迷宫齿的互补密封表面的平台。 通过将组合的迷宫和刷子密封件定位在轴的外径的径向外侧，消除了转子的热弯曲。 通过在相同的径向位置提供备用迷宫式密封，在刷密封故障的情况下，轴向推力负载被消除。