Insert for a wind turbine blade root
AssigneeVestas Wind Systems A/S
InventorsJonathan Smith, James Smith, Robert Ernst, Mark Folsom
Life of this patent
Estimating the term…
Abstract
An insert (105) for a wind turbine blade root. The insert (105) has a bushing (40) and an outer surface with circumferential annular grooves (68). A transition layer 5 (102) is built up around the bushing (40). The transition layer (102) has fibrous material sheet layers and filamentary material windings (80) in the grooves which alternate with fibrous plies (98) covering the grooves (68). Each fibrous ply (98) is anchored into the grooves (68) by the windings (80). Fibrous battens (148) are fitted around the transition layer (102) to form an insert body (108). Each batten (148) 10 has a deltoid cross-section so that the battens give the insert a quadrilateral or trapezoidal cross-section.
Claims19
An insert for a wind turbine blade root, the insert comprising:
- an insert body;
- a bushing with a threaded bore and an outer surface with a plurality of unconnected circumferential grooves, wherein each groove extends circumferentially about the outer surface of the bushing;
- and
- a transition layer comprising fibrous plies covering the bushing outer surface, and windings over said fibrous plies such that successive said plies alternate with said windings,
- wherein each fibrous ply is anchored into the grooves by an associated set of said windings, and said insert body surrounds said transition layer.
An insert for a wind turbine blade root, the insert comprising a bushing embedded in an insert body, said bushing having a threaded bore, wherein said insert body comprises two or more fibrous battens fitted around the bushing, and each batten has a deltoid cross-section so that the battens give the insert a quadrilateral cross-section.
An insert for a wind turbine blade root, the insert comprising:
- an insert body;
- a bushing with a threaded bore and an outer surface with circumferential grooves;
- and
- a transition layer comprising fibrous plies covering the bushing outer surface, and windings over said fibrous plies such that successive said plies alternate with said windings;
- wherein each fibrous ply is anchored into the grooves by an associated set of said windings, and said insert body surrounds said transition layer;
- and
- wherein the threaded bore has an internal thread, wherein the bushing comprises an end region which contains the threaded bore and a body region which has the outer surface with the circumferential grooves, and wherein the end region is offset from the body region so that none of the grooves encircle the internal thread.
Dependencies are inferred from the claim text.