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TECHNIQUE TO MODULARIZE WIND BLADE

IP.com Disclosure Number: IPCOM000240664D
Publication Date: 2015-Feb-17
Document File: 8 page(s) / 4M

Publishing Venue

The IP.com Prior Art Database

Abstract

The present disclosure provides a technique for modularizing wind blades. The technique includes configuring a central load element and sub-assembled frames. A part of wind blade skin, which was conventionally made of resin infused fiber composite, is replaced by frames. The frames are filled with rigid panels. Further, several panel materials in the building industry are used for wind blade design. The frames are joined to a main load bearer of the wind blade and spar caps or shear web system. The frames are connected to each other, either rigidly or flexibly. Finally a tail piece is joined to the frame to provide a better aerodynamic shape.

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TECHNIQUE TO MODULARIZE WIND BLADE

BACKGROUND

The present disclosure relates generally to wind blades and more particularly to a technique of modularizing wind blades.

Wind blades have attained lengths of approximately 60-77 meters in recent years and are continuously increasing in length. It is observed that along with increasing length of wind blades there is a considerable increase in width of wind blades at a maximum chord location. However, width of the blade at the maximum chord location poses even a greater challenge compared to the length of the blade. This is due to less flexibility to accommodate wider blades in transportation. Due to transportation limitations, larger width blades require modularization. However, blade modularization requires a different structure of blades from conventional architecture.

It would be desirable to have a technique to provide modularized wind blade to attain flexibility for ease of transportation.

BRIEF DESCRIPTION OF DRAWINGS

Figure 1 depicts bonding of hinge blocks to a spar cap at different locations.

Figure 2 depicts installation of a lower panel.

Figure 3 depicts installation of upper panels and connections.

Figure 4 depicts a silicone joint cover installation between the panels.

Figure 5 depicts a detailed view of silicone joint cover installation.

Figure 6 depicts adjustment of silicone strip in between panels.

Figure 7 depicts blade inversion to access bottom panels.

Figure 8 depicts installation of a bottom side silicone joint cover.

Figure 9 depicts assembling of a trailing edge (TE) piece to upper angle brackets.

Figure 10 depicts fastening of the TE piece to the angle brackets.

Figure 11 depicts silicone filling of a gap at the spar cap.

DETAILED DESCRIPTION

The present disclosure provides a technique for modularizing wind blades. The technique includes configuring a central load element and sub-assembled frames. The load element and frames may be manufactured and transported separately. The final assembly is configured on site.

A part of wind blade skin, which was conventionally made of resin infused fiber composite, is replaced by frames. The frames can be made of metals, composites or similar engineering materials. The frames are filled with rigid panels. Further, several panel materials in the building industry are used for wind blade design. The frames are joined to a main load bearer of the wind blade and spar caps or shear web system. The frames are connected to each other, either rigidly or flexibly. Finally a tail piece is joined to the frame to provide a better aerodynamic shape. A similar approach may be used in the leading edge of the blade where the tail is replaced by a nose piece. In a trailing edge assembly process, hinge blocks are bonded to spar caps at different location.

Figure 1 depicts bonding of hinge blocks to the spar cap at different locations.

Figure 1

Next a lower panel is installed using pins in each hinge block. Support is provided under each panel to avoid s...