公开(公告)号：US07390160B2

公开(公告)日：2008-06-24

申请号：US11189638

申请日：2005-07-26

申请人： David Paul Blatchford ,  Philip David Hemsley

发明人： David Paul Blatchford ,  Philip David Hemsley

IPC分类号： F01D1/00

CPC分类号： F01D11/025 ,  F01D11/001 ,  F01D11/18 ,  F05D2220/31 ,  F05D2230/642 ,  F05D2240/56 ,  F05D2300/502

摘要： A turbine, e.g., a high pressure (HP) turbine, has a conventional drum-type structure with reaction turbine stages. A preceding or following turbine, e.g. an intermediate pressure (IP) turbine, on a common axis and on the same steam path, has rotor drum which carries an annular row of moving blades having root portions held within a slot in the periphery of the drum. A turbine casing surrounds the drum and carries a static blade assembly with an annular row of static blades which, together with the annular row of moving blades, constitutes a modified turbine stage. The static blade assembly has a radially inner static ring with a radially inner side confronting the periphery of the drum. A seal acts between the inner static ring and the rotor. The static blade assembly has an outer static ring which has a substantially greater thermal inertia and stiffness then the inner static ring and which is capable of sufficient sliding relative to the casing in a radial sense to accommodate relative thermal expansion and contraction of the outer static ring and the turbine casing.

摘要翻译： 涡轮机，例如高压（HP）涡轮机具有传统的鼓式结构，其具有反应涡轮级。 前一个或之后的涡轮机，例如。 中间压力（IP）涡轮机在公共轴线和相同的蒸汽通道上具有转子鼓，转子鼓带有环形的活动叶片，其具有保持在滚筒周边的槽内的根部。 涡轮机壳体围绕滚筒并且携带具有环形静止叶片的静态叶片组件，其与环形行动叶片一起构成改进的涡轮机台。 静态叶片组件具有径向内部静止环，其具有面向滚筒周边的径向内侧。 密封件作用在内部静止环和转子之间。 静态叶片组件具有外部静态环，该外部静态环具有基本上更大的热惯性和刚度，然后是内部静态环，并且能够以径向方式相对于壳体足够的滑动，以适应外部静态环的相对热膨胀和收缩 和涡轮机壳体。