公开(公告)号：US20160123158A1

公开(公告)日：2016-05-05

申请号：US14925059

申请日：2015-10-28

Applicant: ALSTOM Technology Ltd

Inventor： Rolf HUNZIKER ,  Krzysztof CHEREK ,  Sigurd KUBEL

IPC: F01D5/28 ,  F01D5/14

CPC classification number: F01D5/28 ,  F01D5/147 ,  F01D5/282 ,  F01D5/286 ,  F05D2250/38

Abstract: The invention relates to sheath for a blade that has a uniform assembly direction over the radial height of the sheath whether the blade has a straight or curved trajectory. This is achieved by the a sheath formed around the edge, having a first inner surface wherein a first tangential vector projected tangentially to the first inner surface in a direction away from the head portion in an longitudinal plain forms a first angle with the rotational axis that does not vary over the radial height of the sheath while a second tangential vector projected tangentially from any point of the second inner surface of the sheath in a direction towards the head portion intersects the first tangential vector.

Abstract translation: 本发明涉及一种用于叶片的护套，其具有在鞘的径向高度上均匀的组装方向，无论刀片是具有直的还是弯曲的轨迹。 这是通过围绕边缘形成的护套来实现的，其具有第一内表面，其中在纵向平面中远离头部的方向上与第一内表面相切地突出的第一切向矢量与旋转轴形成第一角度， 在护套的径向高度上不变化，而沿着护套的第二内表面的任何点在朝向头部的方向上相切地突出的第二切向矢量与第一切向量相交。