Patent ID: 9551317
Date: 2017-01-24
CPC Classifications: B21D,B21K,F03D,F05B,Y02E,Y10T

Claim:
1. A wind turbine blade for a wind turbine rotor comprising a hub from which the wind turbine blade extends when mounted to the hub, the wind turbine blade including a shell structure of a fibre-reinforced composite material comprising fibres embedded in a polymer matrix, the wind turbine blade extending in longitudinal direction and having a profiled contour including a pressure side and a suction side as well as a leading edge and a trailing edge, said edges defining a chord plane therebetween, when seen in the longitudinal direction the profiled contour comprising a root region with a root end face, an airfoil region and optionally a transition region between the root region and the airfoil region, the root region having a ring-shaped cross section with an outer surface and an inner surface, the root region comprising a plurality of elongated fastening members provided with fastening means, wherein the elongated fastening members are embedded mutually spaced apart in the fibre-reinforced polymer matrix so as to substantially follow a circumference of the root region and allow access from outside of the blade to the fastening means used for mounting the blade to the hub, the fastening members comprising an outer surface, a first end arranged at the root end face and a second end opposite the first end thereof, characterised in that at least a number of the elongated fastening members are provided with at least one notch in the periphery thereof, said notch having a notch wall, a first notch end and an opposite second notch end, and that a rod-shaped locking element passes through said notch so as to at least substantially engage at least a portion of the notch wall and so that a first portion of the rod-shaped locking element extends beyond the first notch end and a second portion of the rod-shaped locking element extends beyond the second notch end, the rod-shaped locking element being fixedly arranged in a circular bore having an axis and extending at least partly through the shell structure of the root region from the inner or outer surface of the shell structure.