Vestas Wind Systems A/s

Robert Charles Preston

Sean Keohan

Jonathan Smith

Andrew Hedges

A method of forming a structural web for a wind turbine blade comprises providing a web member having a web portion and a flange portion extending away from each other, where 5 a heel of substantially curvilinear form is located between the web portion and the flange portion. A planar flange extender comprising a cured composite material is arranged together with the web member with the flange extender positioned adjacent to the flange portion so that a portion of the flange extender projects past the heel and away from the web portion. The flange extender is integrated with the web member in a resin matrix, or 10 with an adhesive, to form the structural web. A structural web and a wind turbine blade comprising the web is disclosed.

Wind turbine blade manufacture

A wind turbine blade shear web comprises an elongate panel () having a first side and an opposing second side and a longitudinally extending flange () arranged along a longitudinal edge of the panel. The flange comprises a plurality of elongate flange sections () arranged along the first side of the panel and integrated therewith. Each flange section comprises a plurality of elongate flange elements arranged one on top of another and offset from one another in a longitudinal direction of the flange section () such that the offset between the flange elements defines a tapered portion at each of a first and second longitudinal end of the flange section. The tapered portions of longitudinally adjacent flange sections overlap to define at least one scarf joint between said adjacent flange sections.

Relating to wind turbine blade manufacture

A method of forming a wind turbine blade shear web flange section () by resin transfer moulding comprises providing a mould assembly () comprising a mould surface () defining a mould cavity and arranging a plurality of elongate flange elements () with the mould surface in an array () such that the flange elements are positioned one on top of another with first and second longitudinal ends () of each flange element longitudinally offset from respective first and second longitudinal ends of a neighbouring flange element so as to form a tapered portion () at each of a first and second longitudinal end of the flange section (). A The method further comprises injecting resin to the mould cavity and curing the array of flange elements in a resin matrix to form a cured flange section having a laminate construction.

Improvements relating to wind turbine blade manufactureA method of making a wind turbine blade is described. The method involves providing a blade shell having an inner surface defining a mounting region and positioning a web in the mounting region. One or more web restraining devices are used to secure the position of the web in the mounting region. Each restraining device has a first portion attached to the web and a second portion attached to the inner surface of the blade shell. The 10 restraining devices are configured to prevent movement of the web in a first plane substantially parallel to the mounting region and to permit movement of the web in a second plane substantially perpendicular to the mounting region. The method further comprises moving the web in the second plane away from the mounting region and performing one or more preparatory operations on the mounting region with the webmoved away from the mounting region. The web is then repositioned in the mounting region by moving the web in the second plane back towards the mounting region.

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Cowes, United Kingdom

Robert Charles Preston