A wind turbine blade having a circular root portion and provided with root bushings for mounting the blade to a wind turbine hub, and the root bushings comprise an elongated cross-sectional profile with a first dimension oriented along a radius of the circular root portion being larger than a second
A wind turbine blade having a circular root portion and provided with root bushings for mounting the blade to a wind turbine hub, and the root bushings comprise an elongated cross-sectional profile with a first dimension oriented along a radius of the circular root portion being larger than a second dimension oriented along a circumferential direction of the circular root section.
대표청구항▼
1. A wind turbine blade (10) for a rotor of a wind turbine (2), said rotor comprising a hub (8), from which the blade (10) extends substantially in a radial direction when mounted to the hub (8), the wind turbine blade including a shell structure of a fibre-reinforced composite material comprising f
1. A wind turbine blade (10) for a rotor of a wind turbine (2), said rotor comprising a hub (8), from which the blade (10) extends substantially in a radial direction when mounted to the hub (8), the wind turbine blade including a shell structure of a fibre-reinforced composite material comprising fibres embedded in a polymer matrix, the blade having a longitudinal direction (r) with a tip end (16) and a root end (14) and a transverse direction as well as having a blade length (L), the blade further comprising: a profiled contour including a pressure side and a suction side, as well as a leading edge (18) and a trailing edge (20) with a chord having a chord length (c) extending there between, the profiled contour, when being impacted by an incident airflow, generating a lift, wherein the profiled contour comprises: a root region (30) comprising a root end face (29), andan airfoil region (34) having a lift-generating profile furthest away from the hub, whereinthe root region comprises a ring-shaped cross section with an outer surface (36) and an inner surface (35), wherein the root region (30) comprises a plurality of elongated fastening members (40) provided with fastening means (48) and embedded mutually spaced apart in the fibre-reinforced composite material so as to substantially follow a circumference of the root region (30) and allow access from the outside to the fastening means (40) used for mounting the blade (10) to the hub (8),the elongated fastening members (40) comprise a first end (44) arranged at the root end face, a second end (46) opposite the first end (44) thereof and an outer periphery (42), whereinthe elongated fastening members (40) comprise an elongated cross-sectional profile with a first dimension (d1) oriented in a radial direction of the ring-shaped cross-section being larger than a second dimension (d2) oriented in a circumferential direction of the ring shaped cross-section, the elongated cross-sectional profile is substantially elliptical over the entire longitudinal extent of the elongated fastening members, and a cross-sectional area of each elongated fastening member is substantially uniform from the first end to the second end. 2. The wind turbine blade (10) according to claim 1, wherein the first dimension is at least 10% larger than the second dimension. 3. The wind turbine blade (10) according to claim 2, wherein the first dimension is at least 15% larger than the second dimension. 4. The wind turbine blade (10) according to claim 3, wherein the first dimension is at least 20% larger than the second dimension. 5. The wind turbine blade (10) according to claim 4, wherein the first dimension is at least 25% larger than the second dimension. 6. The wind turbine blade (10) according to claim 1, wherein the elongated fastening members (40) are made by casting. 7. The wind turbine blade (10) according to claim 6, wherein the elongated fastening members (40) are made of cast steel. 8. The wind turbine blade (10) according to claim 1, wherein the elongated fastening members (40) are bushings. 9. The wind turbine blade (10) according to claim 8, wherein the fastening means comprise an inner threaded bore. 10. The wind turbine blade (10) according to claim 9, wherein the second dimension is at least 20% larger than a diameter of the threaded bore. 11. The wind turbine blade (10) according to claim 1, wherein the root region further comprises a number of inserts arranged in regions between adjacent elongated fastening members, the insert abutting at least a part of the outer periphery of the elongated fastening members. 12. The wind turbine blade (10) according to claim 11, wherein the inserts are formed of a fibre-reinforced polymer. 13. The wind turbine blade (10) according to claim 1, wherein the profiled contour further comprises a transition region (32) between the root region (30) and the airfoil region (34).
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이 특허에 인용된 특허 (9)
Welch, John M., Apparatus and method for shielding a thrust reverser structure from engine heat.
Bendel, Urs; Werner, Markus; Knops, Martin, Method for establishing a blade connection of a rotor blade, a blade connection and a securing element for a blade connection.
Hancock, Mark; Bech, Anton, Method of manufacturing a wind turbine blade shell member with a fastening member and a wind turbine blade with a fastening member.
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