Rotor blade with edge protection
AssigneeGeneral Electric Technology GmbH
InventorsRolf Hunziker, Krzysztof Cherek, Sigurd Kubel
Life of this patent
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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.
Claims6
A rotating blade having:
- a rotational axis defining a circumferential direction that is concentric to the rotational axis
- a first surface;
- a second surface diametrically opposed the first surface;
- an curved edge, defined by a junction, in a radial direction, between the first surface and the second surface, wherein the curved edge is curved from the radial direction in the circumferential direction;
- a core defining the basic shape of the rotating blade
- a sheath covering a section of the core so as to form a portion of the first surface, the second surface and the curved edge, the sheath comprising:
- a first radial end;
- a second radial end radially distal from the first radial end;
- a head portion forming the portion of the curved edge between the first radial end and the second radial end;
- a first portion, extending from the head portion to form a portion of the first surface, having a first inner surface facing the core;
- and
- a second portion, extending from the head portion to form a portion of the second surface, having a second inner surface that faces the core,
- wherein the orientation of the first surface and the second surface relative to each other is such that over the radial height of the sheath, the sheath has a fixed assembly angle on the core.
Dependencies are inferred from the claim text.