Bucket dovetail bridge member and method for eliminating thermal bowing of steam turbine rotors
    12.
    发明授权
    Bucket dovetail bridge member and method for eliminating thermal bowing of steam turbine rotors 失效
    铲斗燕尾桥构件及消除汽轮机转子热弯的方法

    公开(公告)号:US06558118B1

    公开(公告)日:2003-05-06

    申请号:US09985183

    申请日:2001-11-01

    IPC分类号: F01D1100

    摘要: A steam turbine has a rotor mounting axially spaced rotor wheels having male dovetails for mounting a plurality of axially spaced buckets having female dovetails. A plurality of arcuate bridging members extend axially between the axially adjacent bucket dovetails at locations spaced radially outwardly of the surface of the rotor shaft. A diaphragm in radial opposition to the bridging member mounts a brush seal having bristles engaging the bridging member. The bridging member carries backup labyrinth seal teeth for sealing with the diaphragm. The friction generated by contact between the brush seal bristles and bridging members lies radially outwardly of the rotor whereby non-uniform distribution of heat about the rotor surface due to frictional contact with the brush seal is avoided, with consequent avoidance of rotor bowing.

    摘要翻译: 蒸汽轮机具有转子安装轴向间隔开的转子轮,其具有用于安装多个具有凹形燕尾的轴向间隔开的桶的阳形燕尾。 多个弓形桥接构件在轴向相邻的铲斗燕尾形之间沿与转子轴的表面径向向外间隔开的位置轴向延伸。 与桥接构件径向相对的隔膜安装有具有接合桥接构件的刷毛的刷密封。 桥接构件带有用于与隔膜密封的备用迷宫式密封齿。 由刷子密封刷毛和桥接构件之间的接触产生的摩擦力位于转子的径向外侧,从而避免了由于与刷子密封件的摩擦接触而导致转子表面的不均匀分布,从而避免了转子弯曲。

    Bucket tip brush seals in steam turbines and methods of installation
    18.
    发明授权
    Bucket tip brush seals in steam turbines and methods of installation 失效
    蒸汽涡轮机中的铲头刷密封件和安装方法

    公开(公告)号:US06431827B1

    公开(公告)日:2002-08-13

    申请号:US09741742

    申请日:2000-12-21

    IPC分类号: F01D1108

    摘要: A diaphragm has an annular groove formed of deep and shallow grooves with the deep groove opening into the shallow groove. A combination spill strip/brush seal is disposed in the groove. The brush seal comprises a pair of flexible bars secured to the proximal ends of the brush bristles by welding and is received in the shallow groove and a recess in an axial face of the spill strip. The spill strip has base portions extending into the deep groove. The combination spill strip/brush seal is secured in the annular groove by peening material of the diaphragm into the spill strip/brush seal combination. The brush seal may be used with different diameters of spill strips and diaphragm grooves.

    摘要翻译: 隔膜具有由深而浅的槽形成的环形槽,深槽通向浅槽。 组合式溢流条/刷密封件设置在凹槽中。 刷子密封件包括通过焊接固定到刷毛的近端的一对柔性杆,并且容纳在浅槽中和在溢出条的轴向面中的凹部。 溢出带具有延伸到深槽中的基部。 通过将隔膜的材料喷丸到溢流带/刷子密封组合中,组合的溢出带/刷子密封件固定在环形槽中。 刷密封件可以与不同直径的溢流带和隔膜槽一起使用。

    Arrangement and method for accurately radially locating a turbine brush seal
    19.
    发明授权
    Arrangement and method for accurately radially locating a turbine brush seal 失效
    涡轮刷密封的精确径向定位的布置和方法

    公开(公告)号:US06261057B1

    公开(公告)日:2001-07-17

    申请号:US09412072

    申请日:1999-10-04

    IPC分类号: F01D500

    摘要: An arrangement and method for accurately radially locating a brush seal relative to a rotor provides a labyrinth seal segment having a slot open toward the rotor and defining an interior ledge facing away from the rotor, a brush seal segment inserted in the slot and having an exterior shoulder facing toward the rotor and overlying the interior ledge of the labyrinth seal segment such that the brush seal segment can move radially relative to the labyrinth seal segment and rotor and the shoulder of the brush seal segment can move toward and away from the interior ledge of the labyrinth seal segment, and set screws tightened into spaced apart threaded holes in the labyrinth seal segment forcing the shoulder of the brush seal segment against the ledge of the labyrinth seal segment so as to prevent radial floating of the brush seal segment relative to the labyrinth seal segment.

    摘要翻译: 用于相对于转子精确地径向定位刷子密封件的布置和方法提供了一种迷宫式密封件,其具有朝向转子敞开的狭槽,并限定了背向转子的内部凸缘,插入槽中的刷子密封件段 肩部朝向转子并且覆盖迷宫式密封段的内部凸缘,使得刷密封段可相对于迷宫式密封段和转子径向移动,并且刷式密封段的肩部可以朝向和远离内部凸缘 迷宫式密封段和固定螺丝拧紧在迷宫密封段中的间隔开的螺纹孔中,迫使刷子密封段的肩部抵靠迷宫式密封段的凸缘,以防止刷密封段相对于迷宫的径向漂浮 密封段。