Methods for manufacturing wind turbine rotor blade components

Patent metadata

Field	Value
Publication number	US-11738530-B2
Application number	US-201815928254-A
Country	US
Kind code	B2
Filing date	Mar 22, 2018
Priority date	Mar 22, 2018
Publication date	Aug 29, 2023
Grant date	Aug 29, 2023

Abstract

A method for manufacturing a rotor blade component of a rotor blade includes feeding a flat sheet of material into a thermoforming system, wherein the material comprises at least one of a thermoplastic or thermoset material. The method also includes heating the flat sheet of material via the thermoforming system. Further, the method includes shaping the heated flat sheet of material via at least one roller of the thermoforming system into a desired curved shape. Moreover, the method includes dispensing the shaped sheet of material from the thermoforming system. In addition, the method includes cooling the shaped sheet of material to form the rotor blade component.

First claim

What is claimed is:

1. A method for manufacturing a rotor blade component of a rotor blade, the method comprising:
feeding a flat sheet of material into a thermoforming system, wherein the material comprises at least one of a thermoplastic material or a thermoset material, the thermoforming system comprising a housing having an inlet and an outlet, one or more heating elements within the housing, an adjustable frame secured within the housing, at least one roller rotatably mounted to the adjustable frame within the housing, the adjustable frame being movable so as to adjust a position of the at least one roller in a horizontal direction, a vertical direction, and an annular direction, and a curved support structure for supporting the flat sheet of material as the flat sheet of material is heated via the least one heating element, the curved support structure and the least one roller configured to shape the flat sheet of material into a curved shape;
heating the flat sheet of material via the one or more heating elements of the thermoforming system as the flat sheet of material passes through the housing;
shaping the heated flat sheet of material into the curved shape via the curved support structure and the at least one roller by adjusting the position of the at least one roller in the horizontal direction, the vertical direction, and the annular direction and by pivoting the at least one roller via the adjustable frame by moving the adjustable frame up and down, side-to-side, and about at least one pivot point to cause the at least one roller to contact and form the heated flat sheet of material into the curved shape;
dispensing the shaped sheet of material from the thermoforming system via the outlet; cooling the shaped sheet of material to at least partially form the rotor blade component; and
dispensing a plurality of pultruded members directly from at least one movable pultruded member dispensing assembly into the shaped sheet of material.

2. The method of claim 1 , wherein shaping the heated flat sheet of material into the desired curved shape further comprises shaping the heated flat sheet of material into a U-shaped receptacle via the curved support structure and the at least one roller.

3. The method of claim 2 , wherein dispensing the plurality of pultruded members directly from the at least one movable pultruded member dispensing assembly into the shaped sheet of material further comprises placing the plurality of pultruded members into the U-shaped receptacle and securing the plurality of pultruded members within the U-shaped receptacle to form the rotor blade component.

4. The method of claim 3 , wherein placing the plurality of pultruded members into the U-shaped receptacle further comprises:
dispensing a layer at a time of the plurality of pultruded members directly from a pultruded member dispensing assembly into the U-shaped receptacle; and,
stacking subsequent layers of the plurality of pultruded members atop each other until the U-shaped receptacle is filled.

5. The method of claim 4 , further comprising securing each layer of pultruded members together via a clamp as the layer is dispensed from the pultruded member dispensing assembly.

6. The method of claim 3 , further comprising securing the plurality of pultruded members within the U-shaped receptacle via a resin infusion process.

7. The method of claim 6 , further comprising:
placing at least one fiber-reinforced polymer sheet atop the U-shaped receptacle containing the plurality of pultruded members;
placing one or more pultruded plates atop the fiber-reinforced polymer sheet; and
securing the plurality of pultruded members, the fiber-reinforced polymer sheet, and the one or more pultruded plates together via the resin infusion process to form the rotor blade component.

8. The method of claim 6 , further comprising placing at least one ultrasonic transducer atop the at least one fiber-reinforced polymer sheet to assist with packing the plurality of pultruded members within the U-shaped receptacle.

9. The method of claim 1 , further comprising continuously adjusting a position of the at least one roller via the adjustable frame to vary an amount of pressure being applied to the heated flat sheet of material to shape the heated flat sheet of material into the desired shape.

10. The method of claim 9 , further comprising adjusting the position of the at least one roller via the adjustable frame in at least one of a vertical direction or a horizontal direction to modify a thickness or a width of the heated flat sheet of material.

11. A thermoforming system for manufacturing a rotor blade component for a rotor blade, the thermoforming system comprising: a housing comprising a first end and second end and an inlet and outlet, the system also having one or more heating elements within the housing, an adjustable frame, a curved support structure, and at least one movable pultruded member dispensing assembly, the first end of the housing adapted to receive a flat sheet of material and the curved support structure adapted to support the flat sheet of material, the at least one heating element at least partially contained within the housing, the at least one heating element configured to heat the flat sheet of material, the adjustable frame secured within the housing and being adapted to move so as to adjust a position of at least one roller, rotatably mounted to the adjustable frame within the housing, in a horizontal direction, a vertical direction, and an annular direction, the curved support structure and the least one roller configured to shape the flat sheet of material into a curved shape by pivoting the at least one roller via the adjustable frame and by moving the adjustable frame up and down, side-to-side, and about at least one pivot point to cause the at least one roller to contact and form the heated flat sheet of material into the curved shape, and the at least one movable pultruded member dispensing assembly adapted to dispense a plurality of pultruded members directly into the curved shape.

12. The system of claim 11 , further comprising at least one movable pultruded member dispensing assembly for dispensing a plurality of rods into the curved shape.

13. The system of claim 11 , wherein the at least one pultruded member dispensing assembly is removably mounted adjacent to at least one of a first end of the curved shape, above the curved shape, or adjacent to the curved shape.

14. The system of claim 13 , further comprising at least one clamp for securing individual layers of the plurality of pultruded rods together as each layer is dispensed from the at least one pultruded member dispensing assembly.

15. The system of claim 13 , further comprising at least one spacer positioned within the curved shape for spacing apart the plurality of pultruded rods as the rods are dispensed from the at least one pultruded member dispensing assembly.

16. The system of claim 13 , further comprising a controller communicatively coupled to at least one of the at least one movable pultruded member dispensing assembly or the adjustable frame.

17. The method of claim 1 :
wherein shaping the heated flat sheet of material into the desired curved shape further comprises shaping the heated flat sheet of material into a U-shaped receptacle via the curved support structure and the at least one roller;
wherein dispensing the plurality of pultruded members directly from the at least one movable pultruded member dispensing assembly into the shaped sheet of material further comprises placing the plurality of pultruded members into

Assignees

• Gen Electric

Inventors

• Albert Bensely
• Althoff Nicholas K
• Johnson Stephen Bertram

Classifications

• Y02P70/50

  Manufacturing or production processes characterised by the final manufactured product · CPC title

• B29D99/0025 Primary

  Producing blades or the like, e.g. blades for turbines, propellers, or wings · CPC title

• B29C51/08

  Deep drawing or matched-mould forming, i.e. using mechanical means only · CPC title

• B29C51/12

  of articles having inserts or reinforcements · CPC title

• B29C51/421

  of preforms, specially adapted for thermoforming (preheating sheets in general B29B13/023; B29C51/427 takes precedence) · CPC title