Shear web assembly interconnected with additive manufactured components

Patent metadata

Field	Value
Publication number	US-11035339-B2
Application number	US-201815935272-A
Country	US
Kind code	B2
Filing date	Mar 26, 2018
Priority date	Mar 26, 2018
Publication date	Jun 15, 2021
Grant date	Jun 15, 2021

Abstract

A method for assembling a shear web assembly of a wind turbine includes providing at least one spar cap. The method also includes forming a spar connecting member of a thermoplastic material via additive manufacturing. Further, the method includes securing the spar connecting member to the spar cap. Moreover, the method includes providing a shear web, forming a web connecting member of a thermoplastic material via additive manufacturing, and securing the web connecting member at a first end of the shear web. In addition, the method includes interconnecting the web connecting member and the spar connecting member at a joint. Thus, the method further includes heating the joint to secure the web connecting member and the spar connecting member together.

First claim

What is claimed is:

1. A method for assembling a rotor blade of a wind turbine, the method comprising:
forming a first spar connecting member via an additive manufacturing process that utilizes computer numerical control and multiple degrees of freedom to deposit material to form the first spar connecting member;
co-infusing the first spar connecting member with a first spar cap of the rotor blade;
providing a shear web;
forming a first web connecting member via an additive manufacturing process that utilizes computer numerical control and multiple degrees of freedom to deposit material to form the first web connecting member;
co-infusing the first web connecting member at a first end of the shear web, the first spar connecting member and the first web connecting member formed of a thermoplastic material;
interconnecting the first web connecting member and the first spar connecting member at a first joint; and,
heating the first joint to secure the first web connecting member and the first spar connecting member together.

2. The method of claim 1 , further comprising:
forming a second spar connecting member via an additive manufacturing process that utilizes computer numerical control and multiple degrees of freedom to deposit material to form the second spar connecting member;
co-infusing a second web connecting member at an opposing, second end of the shear web, the second spar connecting member and the second web connecting member formed of a thermoplastic material;
interconnecting the second web connecting member and the second spar connecting member at a second joint; and,
heating the second joint to secure the second web connecting member and the second spar connecting member together.

3. The method of claim 2 , further comprising:
forming a lower shell member of the rotor blade;
forming a second spar cap on the lower shell member, the second spar cap comprising the second spar connecting member co-infused therewith;
interconnecting the second web connecting member and the second spar connecting member at the second joint;
forming an upper shell member of the rotor blade;
forming the first spar cap on the upper shell member, the first spar cap comprising the first spar connecting member co-infused therewith;
interconnecting the first web connecting member and the first spar connecting member at the first joint; and,
heating the first and second joints.

4. The method of claim 2 , further comprising:
forming at least one of the first joint or the second joint via an ultra-sound signal transmitting material; and,
inspecting at least one of the first joint or the second joint via non-destructive testing (NDT) inspection.

5. The method of claim 3 , wherein forming the first and second spar caps comprising the first and second spar connecting members, respectively, further comprises:
co-infusing the first spar connecting member with the first spar cap; and,
co-infusing the second spar connecting member with the second spar cap.

6. The method of claim 1 , wherein the first and second spar connecting members each comprise a female connector, the first and second web connecting members each comprising a corresponding male connector that fits within the female connectors of the first and second spar connecting members.

7. The method of claim 2 , further comprising providing a cover material atop at least one of the first and second spar connecting members or the first and second web connecting members.

8. The method of claim 7 , further comprising removing the cover material from at least one of the first and second spar connecting members or the first and second web connecting members before interconnecting the first web connecting member and the first spar connecting member and the second web connecting member and the second spar connecting member.

9. The method of claim 7 , further comprising placing a positioning spacer atop at least one of the first and second spar connecting members for alignment of at least one of the first and second web connecting members.

10. The method of claim 1 , further comprising reinforcing the thermoplastic material with at least one fiber material.

11. A method for assembling a shear web assembly of a rotor blade of a wind turbine, the method comprising:
forming a spar connecting member of a thermoplastic material via an additive manufacturing process that utilizes computer numerical control and multiple degrees of freedom to deposit material to form the spar connecting member;
co-infusing the spar connecting member to a spar cap of the rotor blade;
providing a shear web;
forming a web connecting member of a thermoplastic material via an additive manufacturing process that utilizes computer numerical control and multiple degrees of freedom to deposit material to form the web connecting member;
co-infusing the web connecting member with a first end of the shear web;
interconnecting the web connecting member and the spar connecting member at a joint; and,
securing the joint together via thermoplastic welding.

12. A rotor blade assembly for a wind turbine, the rotor blade assembly comprising:
a rotor blade comprising:
an upper shell member having a first spar cap configured on an internal face thereof;
a lower shell member having a second spar cap configured on an internal face thereof, the first and second spar caps comprising first and second spar connecting members, respectively; and,
a shear web extending between the first and second spar caps along a longitudinal length of the rotor blade, the shear web comprising first and second web connecting members extending from opposing ends thereof, the first and second web connecting members received within the first and second spar connecting members to form first and second joints, respectively, the first and second spar connecting members and the first and second web connecting members each formed of a thermoplastic material via an additive manufacturing process that utilizes computer numerical control and multiple degrees of freedom to deposit material to form the first and second spar connecting members and the first and second web connecting members,
wherein the first and second web connecting members are retained within the first and second spar connecting members via thermoplastic welding.

13. The rotor blade assembly of claim 12 , wherein the first and second joints are absent of adhesive.

14. The rotor blade assembly of claim 12 , wherein the first and second spar connecting members each comprise a female connector, the first and second web connecting members each comprising a corresponding male connector.

15. The rotor blade assembly of claim 14 , wherein the male connectors further comprise opposing flanges that rest upon respective first and second spar caps.

16. The rotor blade assembly of claim 12 , wherein the thermoplastic material is reinforced with at least one fiber material.

Assignees

• Gen Electric

Inventors

• Roberts David
• Althoff Nicholas K
• Nielsen Michael Wenani
• Tobin James Robert

Classifications

• B29C65/82

  Testing the joint · CPC title

• F01D5/20

  Specially-shaped blade tips to seal space between tips and stator {(F01D5/225 takes precedence)} · CPC title

• B29D99/0028

  hollow blades · CPC title

• B29L2031/085

  Wind turbine blades · CPC title

• B29C66/112

  Single lapped joints · CPC title