Multi-beam structure glass fiber reinforced plastic vierendeel vane of megawatt wind generator and producing method thereof

A technology for wind turbines and beam structures, which is applied in the field of wind power to achieve the effects of reducing mass, improving flexibility, and increasing bonding area

Inactive Publication Date: 2010-07-07
NANJING JIANGBIAO GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The technical problem to be solved by the present invention is: to overcome the problems of high mass and low production efficiency of existing megawatt fan blades, and provide a multi-beam multi-beam wind turbine Structural fiberglass hollow blade and production method thereof

Method used

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  • Multi-beam structure glass fiber reinforced plastic vierendeel vane of megawatt wind generator and producing method thereof
  • Multi-beam structure glass fiber reinforced plastic vierendeel vane of megawatt wind generator and producing method thereof
  • Multi-beam structure glass fiber reinforced plastic vierendeel vane of megawatt wind generator and producing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The multi-beam structure FRP hollow blade of the megawatt class wind power generator of the present embodiment, such as figure 1 , figure 2 As shown, it includes two leaf shells 1, 2 ( figure 2 As shown, 1 is the blade shell on the pressure surface, 2 is the blade shell on the suction surface), and the main beam 3 fixed on the inner side of the blade shell. It is ring-shaped, and its upper and lower sides are glued and fixed to the inner skin 8 of the two leaf shells and the main beam 3. figure 2 Among them, 7 is the outer skin of the leaf shell, 8 is the inner skin of the leaf shell, and 9 is PVC foam. The main frame of the blade is formed by the rib and the main beam, and the original overall force-bearing blade is changed to a small unit area force, which enhances the torsion of the blade and improves the strength of the blade.

[0037] Such as figure 1 , figure 2 As shown, in this embodiment, two auxiliary shear webs 5, 6 are also arranged inside the leaf...

Embodiment 2

[0040] Such as Figure 4Shown is the cross-sectional view of the blade of this embodiment. In the figure, 1 is the blade shell on the pressure side, 2 is the blade shell on the suction side, 3 is the main beam, 4 is the rib, and the auxiliary shear webs 5 and 6 are respectively fixed on the ribs. On both sides of 4, 7 is an outer skin, 8 is an inner skin, and 9 is a PVC foam. The improvement of this example with respect to Embodiment 1 is that auxiliary beams 11 are respectively arranged on both sides of the main beam 3 of the blade shell, the inner side of the auxiliary beam 11 is bonded and fixed to the rib 4, and the outer side is bonded to the blade shell 1, 2 inner skins 8 are fixed as one. The single-beam is improved to multi-beam, the force on the blade is more reasonable, and the shimmy stiffness of the blade and the stability of the blade structure can be improved. The grid structure formed by the multi-beam and rib improves various mechanical properties and reduces ...

Embodiment 3

[0042] The blade of the present invention also has a structural transformation, that is, two main beams are arranged in each blade shell (the structure of the hollow rib is the same as that of Embodiment 1 and 2), which also forms a mesh structure, changing the traditional blade from a single beam Concentrated force is multi-beam distributed force, which improves the overall strength. In order to further improve the mechanical performance of the blade, in this example, several auxiliary beams are arranged inside each blade shell, the inner side of the auxiliary beam is bonded and fixed with the rib, and the outer side is fixed with the inner skin of the blade shell as a whole.

[0043] Blade production method embodiment 1

[0044] This embodiment is a method for producing a multi-beam structure FRP hollow blade of a megawatt-level wind power generator, such as Figure 5 In order to utilize the female mold to produce the schematic diagram of the suction surface of the blade, t...

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Abstract

The present invention relates to a multi-beam structure glass fiber reinforced plastic vierendeel vane of a megawatt wind generator, which comprises two cane shells, main beams fixed at the inner sides of the cane shells. The improvement is that: a plurality of ribs is distributed at intervals along the long direction of the cane shells; the ribs are in a ring shape; and the upper side surfaces and the lower side surfaces of the ribs are glued with the inner coating of the cane shells and the main beams to be fixed. Original total-stress canes are changed into small area stress by a vierendeel rib structure, torque force is strengthened by the vierendeel rib structure, and the cane strength is improved. Thus, foams do not need to filled, and the cane quality is largely reduced, so the vierendeel rib structure is constructed on a megawatt wind generator cane, the difficulty that the cane is made into big and long is obviously reduced, and the present invention is completely applied to the needs of wind-electric trade progress at the present. The improvement on the structure enables the production steps of the cane to simplify, and the production efficiency is higher. The main beams of the cane and the cane shells are poured into a shape by an integrative way, so mold clamping fastness is higher, and the product performance is more excellent.

Description

technical field [0001] The invention relates to a multi-beam structure FRP hollow blade of a megawatt-level wind power generator and a production method thereof, belonging to the technical field of wind power. Background technique [0002] At present, wind power generators tend to be large-scaled and gigantic. The blades of megawatt wind turbines are all over 38 meters in length, and the larger the installed capacity, the longer the blades will be. The blades of 2.0 megawatt wind turbines even reach 46.5 meters in length, and the longest blade is now 80 meters. Such a huge blade puts forward high requirements on its own strength, production and transportation. [0003] Existing megawatt-level wind turbine blades are made of glass fiber reinforced plastics, which are made of two blade shells glued together. A main beam is fixed on the inner side of the blade shell, and the two main beams are fixed by a shear web. The shells are also filled with foam for added strength. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D1/06
CPCY02E10/72Y02E10/721Y02P70/50
Inventor 朱之成张晨
Owner NANJING JIANGBIAO GRP CO LTD
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