Method of manufacturing a wind turbine blade
AssigneeLm Wp Patent Holding A/S
InventorLars Nielsen
Life of this patent
Estimating the term…
Abstract
In a method for manufacturing a wind turbine blade half shell, a preformed and cured aerodynamic blade shell member 42 of a fibre reinforced resin is provided. A primarily uniaxial fibre material 66 comprising carbon fibre is laid up on a longitudinal inner area 50 of the preformed shell member 42 and then infused with a resin by vacuum-assisted resin transfer moulding (VARTM), where a longitudinal resin inlet channel 80,82 is arranged on a first lateral side 46 and a vacuum channel 86,88 is arranged on a second lateral side 48 of the laid-up fibre material, and the resin is infused in transverse direction from the first to the second lateral side 46,48.
Claims20
A method of manufacturing a portion of a wind turbine blade, said wind turbine blade portion comprising an aerodynamic blade shell member and an integrated longitudinally extending spar cap or main laminate in a predetermined longitudinal area of the shell member, said area having a length and a width defined by a first and a second lateral side, the method comprising the steps of:
- a. providing a preformed cured aerodynamic shell member of a primary resin reinforced by a primary fibre material and having an outer surface and an inner surface;
- b. arranging a lower resin flow medium on the inner surface of the shell member in a longitudinal portion thereof corresponding at least to the predetermined longitudinal area and extending beyond the first and the second lateral side of the predetermined area;
- c. laying up layers of a secondary fibre material comprising carbon fibre for the spar cap or main laminate on the lower resin flow medium in a longitudinal portion thereof corresponding to the predetermined area;
- d. arranging an upper resin flow medium on the laid-up secondary fibre material so as to extend laterally beyond the first lateral side of the predetermined area and overlap the lower resin flow medium in a longitudinal overlap zone at the first lateral side;
- e. arranging a first longitudinal resin inlet channel on the upper and/or the lower resin flow medium laterally outwardly of the first lateral side;
- f. arranging a first longitudinal vacuum channel on/or above the inner surface of the preformed shell member laterally outwardly of the second lateral side;
- g. sealingly arranging a vacuum bag over at least the secondary fibre lay-up, the vacuum channel, the resin inlet channel and the lower and upper resin flow medium to define a mould cavity;
- h. applying a negative pressure to the mould cavity through the vacuum channel;
- i. supplying a secondary resin to the fibre-reinforcing material in the mould cavity through the resin inlet channel;
- and
- j. allowing the secondary resin, the lower resin flow medium and the upper resin flow medium to cure to form an integrated fibre reinforced spar cap or main laminate on the blade shell member.
Dependencies are inferred from the claim text.