公开(公告)号：US08727713B2

公开(公告)日：2014-05-20

申请号：US13027291

申请日：2011-02-15

申请人： Hideki Ono ,  Takeshi Kudo ,  Kenichi Murata ,  Masataka Sonobe ,  Tsutomu Sugiyama

发明人： Hideki Ono ,  Takeshi Kudo ,  Kenichi Murata ,  Masataka Sonobe ,  Tsutomu Sugiyama

IPC分类号： F01D11/02

CPC分类号： F01D11/02 ,  F01D5/225

摘要： A rotor oscillation preventing structure for a steam turbine includes: a stator vane 3; a moving blade 1; a shroud cover 2 installed on an outer circumferential side distal end of the moving blade 1; and a plurality of seal fins 6 installed, at any interval in the axial direction of a rotor, on an wall surface of a stationary body located on an outer circumferential side of the shroud cover 2, a whirl preventing structure comprised of whirl preventing plates 9 or whirl preventing grooves 11 is provided at a shroud cover inlet return portion 10 of the shroud cover 2 so as to block the whirl flow of leakage flow 8 on an upstream side in an operating steam flow direction of the seal fins to reduce an absolute velocity component of the leakage flow 8 in a rotational direction of the rotor.

摘要翻译： 一种用于汽轮机的转子摆动防止结构，包括：定子叶片3; 动叶片1; 安装在动叶片1的外周侧前端的护罩罩2; 以及在转子的轴向上任意间隔地安装在位于护罩罩2的外周侧上的静止体的壁面上的多个密封翅片6，由防旋转板9构成的防旋转结构 或防水槽11设置在护罩盖2的护罩盖入口返回部10处，以阻止密封翅片的工作蒸汽流动方向上游侧的泄漏流8的旋转流动，从而降低绝对速度 在转子的旋转方向上的泄漏流8的分量。

公开(公告)号：US20110236189A1

公开(公告)日：2011-09-29

申请号：US13027291

申请日：2011-02-15

申请人： Hideki ONO ,  Takeshi KUDO ,  Kenichi MURATA ,  Masataka SONOBE ,  Tsutomu SUGIYAMA

发明人： Hideki ONO ,  Takeshi KUDO ,  Kenichi MURATA ,  Masataka SONOBE ,  Tsutomu SUGIYAMA

IPC分类号： F01D11/02

CPC分类号： F01D11/02 ,  F01D5/225

摘要： Whirl flow of leakage flow is reduced to reduce the occurrence potential of steam whirl.A rotor oscillation preventing structure for a steam turbine includes: a stator vane 3; a moving blade 1; a shroud cover 2 installed on an outer circumferential side distal end of the moving blade 1; and a plurality of seal fins 6 installed, at any interval in the axial direction of a rotor, on an wall surface of a stationary body located on an outer circumferential side of the shroud cover 2, a whirl preventing structure comprised of whirl preventing plates 9 or whirl preventing grooves 11 is provided at a shroud cover inlet return portion 10 of the shroud cover 2 so as to block the whirl flow of leakage flow 8 on an upstream side in an operating steam flow direction of the seal fins to reduce an absolute velocity component of the leakage flow 8 in a rotational direction of the rotor.

摘要翻译： 泄漏流量的旋转流量减少，以减少蒸汽旋转的发生潜力。 一种用于汽轮机的转子摆动防止结构，包括：定子叶片3; 动叶片1; 安装在动叶片1的外周侧前端的护罩罩2; 以及在转子的轴向上任意间隔地安装在位于护罩罩2的外周侧上的静止体的壁面上的多个密封翅片6，由防旋转板9构成的防旋转结构 或防水槽11设置在护罩盖2的护罩盖入口返回部10处，以阻止密封翅片的工作蒸汽流动方向上游侧的泄漏流8的旋转流动，从而降低绝对速度 在转子的旋转方向上的泄漏流8的分量。