Patent ID: 7832985
Filing Date: 2010-11-16
Classification: F03D,F05B,Y02E,Y10S

Abstract:
1. A rotor blade ( 1 ) for a wind energy plant ( 5 ), with a blade root ( 1 a ), with a first longitudinal portion (I) starting from the blade root ( 1 a ), with a second longitudinal portion (II), following up the first longitudinal portion (I) and running into a blade tip ( 2 ), with a first surface (S 1 ), facing a tower ( 6 ) of the wind energy plant ( 5 ) in the assembled state, and a second surface (S 2 ), facing away from the tower ( 6 ) of the wind energy plant ( 5 ) in the assembled state, wherein an imaginary reference plane (B) is spanned up by a rotation, taking place in the operation of the rotor blade ( 1 ), of the longitudinal axis ( 3 ) of the first longitudinal portion (I) around the rotational axis ( 8 ) of a rotor ( 9 ) of the wind energy plant ( 5 ) carrying the rotor blade ( 1 ), characterized in that the first surface (S 1 ) runs along an imaginary cone plane (K) in the region of the second longitudinal portion (II), which is spanned up by a rotation, taking place in the operation, of the first surface (S 1 ) in the region of the second longitudinal portion (II) around the rotational axis ( 8 ) of a rotor ( 9 ) carrying the rotor blade ( 1 ), wherein the cone plane (K) intersects the reference plane (B) in an angle of (α), the distance (A) between the first surface (S 1 ) and the reference plane (B) increases linearly in the direction towards the blade tip ( 2 ) along the second longitudinal portion (II), and the second longitudinal portion (II) is longer than the first longitudinal portion (I).