초록 ▼

An embedding element (11) for embedment in the root of a wind turbine rotor blade (15) of a fibre composite material, said embedding element being elongated and having a first end portion ( 1) and a second end portion (2) and provided with fastening means, eg a threaded hole, a threaded rod or the l

An embedding element (11) for embedment in the root of a wind turbine rotor blade (15) of a fibre composite material, said embedding element being elongated and having a first end portion ( 1) and a second end portion (2) and provided with fastening means, eg a threaded hole, a threaded rod or the like in its first end portion (1). Between its two end portions (1, 2) the embedding element (11) is provided with a first longitudinal lateral face (14) extending substantially concavely in a cross-sectional view perpendicular to the longitudinal axis of the embedding element, and with a second longitudinal lateral face (16) facing opposite the first lateral face (14) and extending substantially correspondingly convexly in a cross-sectional view perpendicular to the longitudinal axis. The invention further relates to a method of producing such an embedding element, a method of producing a wind turbine blade ( 15) of fibre composite material, a plurality of embedding elements (11) being embedded such in juxtaposition in the blade root that they follow the circumference of the root and the concave lateral face (14) of each embedding element (11) engaging the convex lateral face (16) of a juxtaposed embedding element and allowing access to the fastening means (24) from the outside.

대표청구항 ▼

The invention claimed is: 1. An embedding element (11) for embedment in the root of a wind turbine rotor blade (15) of a fibre composite material, said embedding element being elongated and having a first end portion ( 1) and a second end portion (2) and provided with fastening means (24), in its f

The invention claimed is: 1. An embedding element (11) for embedment in the root of a wind turbine rotor blade (15) of a fibre composite material, said embedding element being elongated and having a first end portion ( 1) and a second end portion (2) and provided with fastening means (24), in its first end portion (1), characterised in that between its two end portions (1, 2) the embedding element (11) is provided with planar upper and lower surfaces ( 18, 19), with a first longitudinal lateral face (14) extending substantially concavely in a cross-sectional view perpendicular to the longitudinal axis of the embedding element, and with a second longitudinal lateral face (16) facing opposite the first lateral face (14) and extending substantially correspondingly convexly in a cross-sectional view perpendicular to the longitudinal axis. 2. An embedding element according to claim 1, characterised in that it tapers in the direction towards the second end portion ( 2). 3. An embedding element according to claim 2 characterised in that upper face (18) and the lower face (19) interconnect the concave lateral face (14) and the convex lateral face ( 16), and the upper face (18) and the lower face (19) extend gradually convergently in relation to each other towards the second end portion (2) of the embedding element to provide a wedge-shaped embedding element. 4. A method of producing an embedding element according to claim 1, comprising the steps of providing an elongated core element ( 12), arranging a fastening member (22) including the fastening means (24) at the first end portion of the core element (12) and fixing the core element (12) with the fastening member ( 22) inside a casing (26) by means of an adhesive, said casing including the concave lateral face (15) and the convex lateral face (16). 5. An embedding element (11) for embedment in the root of a wind turbine rotor blade (15) of a fibre composite material, said embedding element being elongated and having a first end portion ( 1) and a second end portion (2) and provided with fastening means (24), in its first end portion (1), characterised in that between its two end portions (1, 2) the embedding element (11) is provided with a first longitudinal lateral face (14) extending substantially concavely in a cross-sectional view perpendicular to the longitudinal axis of the embedding element, and with a second longitudinal lateral face (16) facing opposite the first lateral face (14) and extending substantially correspondingly convexly in a cross-sectional view perpendicular to the longitudinal axis, wherein the embedding element is made of a fibre composite material. 6. A method of providing an embedding element (11) for embedment in the root of a wind turbine rotor blade (15) of a fibre composite material, said embedding element being elongated and having a first endportion (1) and a second end portion (2) and provided with fastening means (24) in its first end portion (1), comprising the steps of providing the embedding element ( 11) between its two end portions (1, 2) with a first longitudinal lateral face (14) extending substantially concavely in a cross-sectional view perpendicular to the longitudinal axis of the embedding element, and with a second longitudinal lateral face (16) facing opposite the first lateral face (14) and extending substantially correspondingly convexly in a cross-sectional view perpendicular to the longitudinal axis, providing an elongated core element (12), arranging a fastening member (22) including the fastening means (24) at the first end portion of the core element (12) and fixing the core element (12) with the fastening member (22) inside a casing (26) by means of an adhesive, said casing including the concave lateral face (15) and the convex lateral face (16), and giving the first end (20) of the core element ( 12) a conical shape and shaping the inwardly facing end (20') of the fastening member (22) AS a corresponding conical recess or vice versa. 7. A method of producing two embedding elements (11) for embedment in the root of a wind turbine rotor blade (15) of a fibre composite material, each said embedding element being elongated and having a first end portion (1) and a second end portion (2) and provided with fastening means (24), in its first end portion (1), characterised in that between its two end portions (1, 2) each said embedding element (11) is provided with a first longitudinal lateral face (14) extending substantially concavely in a cross-sectional view perpendicular to the longitudinal axis of the embedding element, and with a second longitudinal lateral face (16) facing opposite the first lateral face (14) and extending substantially correspondingly convexly in a cross-sectional view perpendicular to the longitudinal axis, providing an elongated core element (12), arranging a fastening member (22) including the fastening means (24) at the first end portion of the core element (12) and fixing the core element (12) with the fastening member (22) inside a casing (26) by means of an adhesive, said casing including the concave lateral face (15) and the convex lateral face (16), wherein a fastening member (22) is arranged at either end of the core element (12) prior to being encased in the casing (26), an inclined, plane cut subsequently being made from the upper face (18) to the lower face (19) or vice versa to provide two embedding elements (11) of wedge shape. 8. A method of producing a wind turbine rotor blade (15 ) of a fibre composite material, comprising the steps of providing a plurality of embedding elements (11), each said embedding element being elongated and having a first end portion (1) and a second end portion (2) and provided with fastening means (24), in its first end portion (1), characterised in that between its two end portions (1, 2) each said embedding element (11) is provided with a first longitudinal lateral face (14) extending substantially concavely in a cross-sectional view perpendicular to the longitudinal axis of the embedding element, and with a second longitudinal lateral face (16) facing opposite the first lateral face (14) and extending substantially correspondingly convexly in a cross-sectional view perpendicular to the longitudinal axis, each said embedding elements being embedded such in juxtaposition in the blade root that they follow the circumference of the root cross section, the concave lateral face (14) of each embedding element (11) engaging the convex lateral face (16) of a juxtaposed embedding element and allowing access from the outside to the fastening means (24) which may be used for securing the blade (15) to a flange on a wind turbine hub. 9. A wind turbine blade (15) made by means of the method according to claim 8. 10. A method according to claim 8 comprising making the circumference of the root cross section circular. 11. A method of producing an embedding element (11) for embedment in the root of a wind turbine rotor blade (15) of a fibre composite material, said embedding element being elongated and having a first end portion (1) and a second end portion (2) and provided with fastening means (24), in its first end portion (1), characterised in that between its two end portions (1, 2) the embedding element (11) is provided with a first longitudinal lateral face (14) extending substantially concavely in a cross-sectional view perpendicular to the longitudinal axis of the embedding element, and with a second longitudinal lateral face (16) facing opposite the first lateral face (14) and extending substantially correspondingly convexly in a cross-sectional view perpendicular to the longitudinal axis and forming the fastening means as a threaded hole or a threaded rod. 12. A method of producing an embedding element (11) for embedment in the root of a wind turbine rotor blade (15) of a fibre composite material, said embedding element being elongated and having a first end portion (1) and a second end portion (2) and provided with fastening means (24), in its first end portion (1), characterised in that between its two end portions (1, 2) the embedding element (11) is provided with a first longitudinal lateral face (14) extending substantially concavely in a cross-sectional view perpendicular to the longitudinal axis of the embedding element, and with a second longitudinal lateral face (16) facing opposite the first lateral face (14) and extending substantially correspondingly convexly in a cross-sectional view perpendicular to the longitudinal axis, providing an elongated core element (12), arranging a fastening member (22) including the fastening means (24) at the first end portion of the core element (12) and fixing the core element (12) with the fastening member (22) inside a casing (26) by means of an adhesive, said casing including the concave lateral face (15) and the convex lateral face (16), and forming the elongated core element (12) from a fibre composite material. 13. A method according to claim 12 comprising making the elongated core element (12) by pultrusion. 14. A method of providing an embedding element (11) for embedment in the root of a wind turbine rotor blade (15) of a fibre composite material, said embedding element being elongated and having a first end portion (1) and a second end portion (2) and provided with fastening means (24), in its first end portion (1), characterised in that between its two end portions (1, 2) the embedding element (11) is provided with a first longitudinal lateral face (14) extending substantially concavely in a cross-sectional view perpendicular to the longitudinal axis of the embedding element, and with a second longitudinal lateral face (16) facing opposite the first lateral face (14) and extending substantially correspondingly convexly in a cross-sectional view perpendicular to the longitudinal axis, providing an elongated core element (12), arranging a fastening member (22) including the fastening means (24) at the first end portion of the core element (12) and fixing the core element (12) with the fastening member (22) inside a casing (26) by means of an adhesive, said casing including the concave lateral face (15) and the convex lateral face (16), and forming the casing (26) with a fibre composition material. 15. A method according to claim 14 comprising making the casing (26) by pultrusion.