VARIABLE LENGTH BLADE TIP MOLDS, TIP ASSEMBLIES AND METHODS FOR MANUFACTURING THE SAME

• US 20140056715A1
• Filed: 08/22/2012
• Published: 02/27/2014
• Est. Priority Date: 08/22/2012
• Status: Active Grant

• Current Assignee: GE Infrastructure Technology, LLC (General Electric Company)
• Original Assignee: General Electric Company
• Inventors: Vossler, Alexander William
• Granted Patent: US 9,140,235 B2
• Time in Patent Office: Days
• US Class Current: 416/241.R
• CPC Class Codes: B29C 33/308 Adjustable moulds for injection moulding B29C45/376
• CPC Class Codes: B29L 2031/082 Blades, e.g. for helicopters
• CPC Class Codes: B29L 2031/085 Wind turbine blades
• CPC Class Codes: F03D 1/0641 of the section profile of the blades, i.e. aerofoil profile
• CPC Class Codes: F03D 1/0675 of the blades
• CPC Class Codes: F05B 2240/302 Segmented or sectional blades
• CPC Class Codes: F05B 2240/31 of changeable form or shape
• CPC Class Codes: Y02E 10/72 Wind turbines with rotation axis in wind direction
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product
• CPC Class Codes: Y10T 29/49337 Composite blade

Abstract

Variable length blade tip molds include standard tip mold sections having a tapered profile and variable length joint mold sections having first ends and second ends with a constant cross section, wherein the variable length blade tip molds can each produce a plurality of tip assemblies of various lengths.

Claims

1. A variable length blade tip mold for a tip assembly of a wind turbine rotor blade, the variable length blade tip mold comprising:

a standard tip mold section comprising a tapered profile; and

,

a variable length joint mold section comprising a first end and a second end having a constant cross section, wherein the variable length blade tip mold can produce a plurality of tip assemblies of various lengths.

2. The variable length blade tip mold of claim 1, wherein the tapered profile comprises an airfoil profile.

3. The variable length blade tip mold of claim 1, wherein an entire joint mold length of the variable length joint mold section comprises the constant cross section.

4. The variable length blade tip mold of claim 1, wherein the constant cross section comprises a tubular profile of the variable length joint mold section comprises the constant cross section.

5. The variable length blade tip mold of claim 1, wherein the standard tip mold section connects to the variable length joint mold section at a transition.

6. The variable length blade tip mold of claim 5, wherein the tapered profile of the standard tip mold section at the transition matches the constant cross section.

7. The variable length blade tip mold of claim 1 further comprising a fiberglass surface comprising the standard tip mold section and the variable length joint mold section.

8. The variable length blade tip mold of claim 4 further comprising a metal base supporting the fiberglass surface.

9. The variable length blade tip mold of claim 1, wherein the standard tip mold section comprises a standard length and the variable length joint mold section comprises a joint mold length that is less than the standard length.

10. The variable length blade tip mold of claim 1, wherein the standard tip mold section and the variable length joint mold section comprise two separate pieces.

11. A method of manufacturing a tip assembly from a variable length blade tip mold, the method comprising:

manufacturing a standard tip portion of the tip assembly from a standard tip mold section comprising a tapered profile; and

,

manufacturing a variable length joint portion of the tip assembly from a variable length joint mold section comprising a first end and a second end having a constant cross section, wherein the variable length blade tip mold can produce a plurality of tip assemblies of various lengths, and wherein the variable length joint portion connects to the standard tip portion.

12. The method of manufacturing the tip assembly of claim 11, wherein an entire joint mold length of the variable length joint mold section comprises the constant cross section.

13. The method of manufacturing the tip assembly of claim 11, wherein the standard tip mold section connects to the variable length joint mold section at a transition.

14. The method of manufacturing the tip assembly of claim 13, wherein the tapered profile of the standard tip mold section at the transition matches the constant cross section.

15. A plurality of tip assemblies manufactured from a variable length blade tip mold, each of the plurality of tip assemblies comprising:

a standard tip portion comprising a tapered profile; and

,

a variable length joint portion comprising a first end and a second end having a constant cross section, wherein the variable length joint portions for at least two of the tip assemblies are different lengths.

16. The plurality of tip assemblies of claim 15, wherein the standard tip portion and the variable length joint portion comprise common materials for each of the at least two tip assemblies of different lengths.

17. The plurality of tip assemblies of claim 15, wherein the standard tip portion connects to the variable length joint portion section at a transition for each of the at least two tip assemblies of different lengths.

18. The plurality of tip assemblies of claim 17, wherein the tapered profile of the standard tip portion at the transition matches the constant cross section for each of the at least two tip assemblies of different lengths.

19. The plurality of tip assemblies of claim 15, wherein the standard tip portion is longer than the variable length joint portion for each of the at least two tip assemblies of different lengths.

20. The plurality of tip assemblies of claim 15, wherein an entire length of the variable length joint portion comprises the constant cross section for each of the at least two tip assemblies of different lengths.