초록 ▼

Structural beam of a wind turbine blade comprising a body-root and a body-trunk in the form of a box with a section decreasing towards the blade tip, comprising various piles each formed by various layers of carbon fiber impregnated with a synthetic resin, located on the upper and lower areas, inter

Structural beam of a wind turbine blade comprising a body-root and a body-trunk in the form of a box with a section decreasing towards the blade tip, comprising various piles each formed by various layers of carbon fiber impregnated with a synthetic resin, located on the upper and lower areas, intercalated between various layers of fiber glass impregnated with synthetic resin arranged along its perimeter, including between two piles, at least one layer of reinforcing material on each of the side areas enveloped by an adhesive resin film. The invention also comprises a procedure for the manufacture of the structural beam which, amongst other stages, includes the application of the layers mentioned onto a mold and the beam curing process.

대표청구항 ▼

1. Structural beam (1) of a wind turbine blade made up of a first body or body-root (2) made from a composite material with a first part (4), near to the wind turbine hub, cylindrical in shape, a third part (6) in the shape of a box and a second part (5) with transitional shape between the first and

1. Structural beam (1) of a wind turbine blade made up of a first body or body-root (2) made from a composite material with a first part (4), near to the wind turbine hub, cylindrical in shape, a third part (6) in the shape of a box and a second part (5) with transitional shape between the first and third part, and a second body or body-trunk (3) in the shape of a box with a decreasing section towards the blade tip, characterised in that the body-trunk (3) is comprised of various piles (26) each one of them formed by various layers of carbon fibre impregnated with synthetic resin (14), situated on the upper areas (7) and lower areas (9), intercalating between various layers of fibre glass impregnated with synthetic resin (15) arranged along the perimeter, including between two piles (26) at least one layer of reinforcing material (16) on each of the side areas (11, 13) enveloped by an adhesive resin film. 2. Structural beam (1) of a wind turbine blade according to claim 1 characterised in that the aforementioned layers of carbon fibre impregnated with synthetic resin (14) are formed by numerous fabrics (49) of carbon fibre impregnated with synthetic resin arranged side by side, without overlapping, with the carbon fibres angled in the same direction as the shaft (12) of the beam (1). 3. Structural beam (1) of a wind turbine blade according to claim 1 characterised in that the aforementioned layers of fibre glass impregnated with synthetic resin (15) are formed by numerous fabrics (8) of fibre glass impregnated with synthetic resin arranged side by side, with an overlapping area between them, with the fibre glass angled at +/−45° in relation to the direction of the shaft (12) of the beam (1). 4. Procedure for the manufacture of a structural beam (1) of a wind turbine blade comprising a first body or body-root (2) made from a composite material with a first part (4), close to the wind turbine hub, cylindrical in shape, a third part (6) in the shape of a box and a second part (5) in a transitional shape between the first and second part, and a second body or body-trunk (3) in the form of a box with a decreasing section towards the tip of the blade, characterised in that it consists of the following stages: a) Preparation of a mould (21), with the hollow shape of the beam (1), provided with mechanisms for turning on its shaft and mechanisms for support on the floor consisting of some retractable supports (57, 58, 59) spaced in relation to the body of the mould (21) and an articulated support (10) at the end of the mould (21) which corresponds to the tip of the blade;b) Insertion of the body-root (2) into the mould (21) and built in fixture at the end of the mould (13) for fixing the first part of the body-root to the moulding system (18);c) Successive application to the mould (21) area relating to the body-trunk (3) of: various layers of fibre glass impregnated with synthetic resin (15) on the complete surface of the mould (21),various layers of carbon fibre impregnated with synthetic resin (14) on the upper part of the mould (21),various layers of fibre glass impregnated with synthetic resin (15) on the complete surface of the mould (21);d) 180° turn of the mould (21), after removing the retractable supports (57, 58, 59);e) Repetition of step c) with the lower side of the mould;f) Application of a layer of reinforcing material (16) on each of the side areas of the mould (21), after placing in these areas some resin sheets which fix them vertically and enveloping the unit with an adhesive, resin film;g) Repetition of steps c) and e) numerous times;h) Curing the beam (3) by applying hot air flow to the external surface of the beam and to the inside of the mould (21);i) Cooling to demoulding temperature, demoulding and cooling the beam to room temperature. 5. Procedure for the manufacture of a structural beam (1) of a wind turbine blade according to claim 4 characterised in that the mould (21) has a demoulding liquid treatment on its surface, in order to facilitate the beam (1) demoulding operation. 6. Procedure for the manufacture of a structural beam (1) of a wind turbine blade according to claim 4 characterised in that the retractable supports (57, 58, 59) of the mould (21) allow the winding machine (47) to pass, by retracting during the winding process. 7. Procedure for the manufacture of a structural beam (1) of a wind turbine blade according to claim 4 characterised in that the beam (3) and the mould (21) remain in a closed vacuum bag (31) connected to a vacuum pump during the preparation of the curing process, reaching internal vacuum pressure of between −0.7 and −0.8 bar, maintaining a minimum pressure of −0.7 bar throughout the curing process. 8. Procedure for the manufacture of a structural beam (1) of a wind turbine blade according to claim 4 characterised in that the inside of the body-trunk (3) area is cured by using the internal channels of the mould (21), into which hot air (34) is introduced via an impulsion pipe (32) of the mould (21), with said pipe being drilled in order for hot curing air to pass to the extraction pipes (33), heating the internal surface of the body-trunk (3). 9. Procedure for the manufacture of a structural beam (1) of a wind turbine blade according to claim 4 characterised in that the inside of the body-trunk (3) is cured in a position in which the support of the mould (21) is carried out using two levelling screws, located at areas of the mould designed for said purpose, with said levelling screws being anchored to curing heaters (25), on the inside. 10. Procedure for the manufacture of a structural beam (1) of a wind turbine blade according to claim 4 characterised in that the beam (1), once completely demoulded, is taken to cooling stations where it is checked to ensure that its form is the form required.