Stator vane assembly for an axial flow turbine

申请公布号：

EP1219783(A2)

申请号：

EP20010129166

申请日期：

2001.12.08

申请公布日期：

2002.07.03

申请人：

ALSTOM TECHNOLOGY LTD

发明人：

BEKRENEV, IGOR

分类号：

F01D9/04;F01D25/12;F01D25/24;(IPC1-7):F01D9/04

主分类号：

F01D9/04

摘要：

<p>The invention relates to coolably fixing the root of a stator vane (3) to the stator casing (1) by means of attachment elements, preferably by means of attachment screws (9), which act with a force fit. In order to reduce the thermal stress on the attachment elements and on the stator casing, the invention proposses that the stator vane root be designed as a hollow profile, comprising a radially inner platform (4) matched to the contour of the flow channel (19) and, at a distance from it, a radially outer platform (5) matched to the contour of the stator casing (1), as well as two essentially parallel sidewalls (6,7), wherein the outer platform (5) is equipped with at least one hole to accommodate an attachment element (9), preferably a screw, originating from the stator casing (1). This allows for cooling this cavity without any essential losses of coolant and for installing vanes without any seals between platforms and other vane root parts. According to one preferred embodiment, the outer platform (5) is detachably connected to the vane root. &lt;IMAGE&gt;</p>