Patent ID: 8827561
Filing Date: 2014-09-09
Classification: F03D,F05B,F16C,Y02E

Abstract:
1. Wind turbine, comprising a tower ( 8 ), a nacelle ( 3 ) being connected to the tower ( 8 ), and a rotor ( 2 ) having a rotor hub ( 6 ) and a number of rotor blades ( 7 ) extending radially outwards from the rotor hub ( 6 ), wherein the nacelle ( 3 ) comprises a hollow shaft ( 10 ) and the rotor hub ( 6 ) comprises a support member ( 11 ) which is connected to the hollow shaft ( 10 ) by two tapered roller bearings ( 14 , 15 ) so as to be rotatable about an axis of rotation ( 5 ), in which the tapered roller bearings ( 14 , 15 ) each have a bearing width (w) which is defined in a direction parallel to the axis of rotation ( 5 ), and in which the tapered roller bearings ( 14 , 15 ) are arranged, viewed in said direction parallel to the axis of rotation ( 5 ), at a distance (d) from one another which is not greater than the bearing width (w) of the tapered roller bearings ( 14 , 15 ), an electrical generator having a static part ( 21 ) and a rotating part ( 20 ), and in which the rotating part ( 20 ) of the electrical generator is fixed to the support member ( 11 ) of the rotor hub ( 6 ), and wherein the rotating part ( 20 ) of the electrical generator is situated radially outward with respect to the tapered roller bearings ( 14 , 15 ), and a pre-stress ring ( 23 ; 27 ) mounted in contact with the tapered roller bearings ( 14 , 15 ), the pre-stress ring having a shape of a tensioning band and being provided on the outer surface of the support member ( 11 ), the pre-stress ring providing a tensioning force on the tapered roller bearings ( 14 , 15 ).