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Fastening rotor blades to the hub of wind turbines

A technology of rotor hub and rotor blade is applied in the field of fixing rotor blades on the hub of wind energy equipment, which can solve problems such as large transverse bolt diameter, and achieve the effect of optimizing stress ratio and reducing diameter

Inactive Publication Date: 2014-01-29
WINDNOVATION ENG SOLUTIONS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The disadvantage of this solution is that the bending moment curve requires a relatively large cross bolt diameter due to the greater distance between the tie anchors connected to the individual cross bolts

Method used

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  • Fastening rotor blades to the hub of wind turbines

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Embodiment Construction

[0015] The rotor blade is fastened by means of cross bolts 4 and anchors 5 , 6 in the region of the blade root, wherein cross bolts 7 are arranged through the root shell wall 3 .

[0016] The cross bolts 4 can be connected to the flange 2 by means of anchors 5, 6 in the form of expansion bolts, wherein each cross bolt 4 is connected to the flange 2 of the rotor hub 1 via two anchors 5, 6, and each anchor 5 , 6 are arranged in separate anchor holes 7 , 8 in the root shell wall 3 .

[0017] In the illustration, the anchor holes 7 , 8 have the same distance from the outer generatrix 9 or inner generatrix 10 of the root shell wall 3 .

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Abstract

The invention relates to the fastening of rotor blades to the rotor hub of wind turbines by means of transverse pins and tension rods in the region of the blade root, wherein the transverse pins are arranged throughout the entire blade root shell wall and can be connected to a flange of the hub by means of the tension rods in the form of expansion screws, wherein each transverse pin (4) can be connected to the flange (2) of the rotor hub (1) by means of two tension rods (5, 6), wherein each tension rod (5, 6) is arranged in a separate tension rod bore (7, 8) in the blade root shell wall (3).

Description

Background technique [0001] When fastening rotor blades to the hub of a wind energy installation, it is known to arrange cross bolts in the region of the rotor blade root in grooves substantially transverse to the longitudinal axis of the rotor blade, which cross bolts are connected by anchors (expansion bolts) with Rotor hub connection. According to DE 31 03 710 C2, the passage of the tension anchors to the cross bolts is realized via a penetration in the housing wall of the rotor blade root. [0002] According to DE 197 33 372 C1, the disadvantage of this design is that the rotor blade is considerably weakened in the region of the blade root due to the through-holes for receiving the cross pins. The solution proposed here is to implement the through-hole in the form of two blind holes and to arrange a tie anchor in each of the two separate passages to the cross bolts arranged in the blind holes. [0003] Since the double penetration also leads to a material weakening of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D1/06F03D13/00F03D13/10F03D80/00
CPCF03D1/0658Y02E10/721F05B2260/301Y10T29/49316Y02E10/72B23P15/04
Inventor 罗兰·施特
Owner WINDNOVATION ENG SOLUTIONS