公开(公告)号：US10018179B2

公开(公告)日：2018-07-10

申请号：US14911688

申请日：2014-08-18

Applicant: ALSTOM RENEWABLE TECHNOLOGIES WIND B.V.

Inventor： Jaume Betran Palomas

IPC: F03D1/06 ,  F03D7/02

CPC classification number: F03D7/0224 ,  F03D1/0675 ,  F05B2240/31 ,  F05B2260/78 ,  F05B2260/964 ,  Y02E10/721 ,  Y02E10/723

Abstract: The present wind turbine blade comprises an airfoil structure comprising an airfoil shape, an internal support structure arranged spanwise along the length of the blade within the airfoil structure, and an elastic connection joining a portion of an inner surface of the airfoil structure with a portion of the internal support structure. The airfoil structure can be passively pitched relative to the internal support structure according to aerodynamic pressure distribution at different blade locations.