JP2006017093A - Wing manufacturing method for both end-fixed wind force prime mover - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wing manufacturing method for a wind force prime mover having both ends fixed to a shaft. <P>SOLUTION: This wind force prime mover is fixed to both ends of a wing. A high strength material having the thickness of a 1.5 rate or less of a maximum wing width, is arranged in the singular number or a plurality on the front edge side of the wing, and a wing surface material is arranged in the wing width direction with this material as a strength base material. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method of manufacturing a blade of a wind power prime mover in which both ends of the blade are fixed to a shaft.

Conventional blades have been manufactured by flat plate shaping or resin molding. Further, the conventional blade has a shape in which only one end is fixed, and the strength base material is usually arranged in the vicinity of 30% from the leading edge near the center of lift in order to prevent torsion.

Natural winds vary rapidly in speed and direction in time and space. In a small windmill, fluctuations in wind speed and wind direction at the rotational position of the blade are small, but in a large windmill having a diameter of 60 m or more, the wind speed and the wind direction change at the rotational position of the blade, and the blade rotates while twisting in the pitch direction. In the wind speed range above the rating, the entire blade is torsionally adjusted with a variable pitch mechanism. However, as the size increases, the required torsional strength increases, and the blade root is required to be greatly strengthened, resulting in an increase in manufacturing cost.
Small windmills are often installed in turbulent places in residential areas. In such a place, there were concerns about the danger of man-made disasters due to breakage of windmills made of hard materials and flying blades.

In a small windmill, in the present invention, both ends of a material having sufficient strength, such as a piano wire, are fixed and placed on the front edge of the blade, and this is used as a strength base material, and the blade surface is a resin plate or rib with a film material. It can be made light and flexible by forming it with tension.
Further, in a large wind turbine, in the present invention, the strength base material in which both ends are fixed in an arch shape can be lighter than the conventional one-end fixed propeller type. From this strength base material, the blade plate, the rib and the membrane material It is only necessary to form a blade surface using, and it is not necessary to be integrated as in the conventional blade, and it is possible to divide into a plurality of blades.
A needle-like material can be arranged on the trailing edge as an auxiliary material for forming the blade surface. The needle-shaped material can be a string, a wire, a pipe or the like.

In order to keep the flow on the blade surface smooth, it is desirable to reduce the strength of the base metal and adjust it to the inflow angle of the wind. It must also be able to respond to changes. The range of change of the inflow angle is about plus or minus 4 degrees relative to the design value, and since the maximum efficiency is maintained even in natural winds by maximizing twice the tangent, the thickness of the strength base material is The maximum blade width should be 1.5% or less.

In a small wind turbine, according to the present invention, it is possible to manufacture a wing in which a strong base material with little damage and a lightweight flexible wing face material coexist, and the strength base material is damaged even in the event of a collision. There is little danger, and even if the wing surface portion made of a lightweight flexible material breaks and scatters, damage to the periphery can be suppressed to a small extent.
Further, in a large windmill, the flexible blade can distort itself and balance the wind speed variation of the wind that changes at each part of the blade and at each rotational position. Further, by making the central portion where the work amount of the blades is a variable pitch type, it becomes possible to manufacture a windmill larger than the conventional windmill. Furthermore, it becomes possible to arrange partial wing stall control and hydro brake wings.

In a small windmill, a high-strength rod is used as a strength base material 1, and both ends thereof are fixed to shafts, and an arch shape is formed with the center as a blade tip. By using this as a leading edge and joining the blade surface 2 shaped with a relatively flexible resin plate material, a flexible blade having sufficient strength can be manufactured. If necessary, the number of high-strength bars can be increased near both ends.
Further, in a large windmill, an arch is formed as a strength base material 11 by using one or a plurality of carbon resin pipes, thin steel pipes, etc., and this is disposed in the vicinity of the leading edge so that the blade surface 9 is formed on the plate material or rib 12. Formed by stretching the material.
Further, by dividing the blade surface by inserting ribs, it becomes possible to incorporate a variable pitch mechanism for moving the divided surface like a flap with a drive unit, and it can be used for output adjustment and braking.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a front view of a both-end fixed wing type wind power generator. The arrow in the figure indicates the direction of rotation.
2 is a side view of a both-end fixed wing type wind power generator. FIG. 3 is a cross-sectional view taken along the line AA ′ of the both-end fixed wing. FIG. 4 is a perspective view of the both-end fixed wing using a plurality of strength base materials. FIG. 6 is a perspective view of a both-end fixed wing having a divided blade surface. FIG. 7 is a perspective view of a wing in which a variable pitch mechanism is partially incorporated. FIG. Slope view of stalled wing

The present invention is effective as a method for preventing excessive rotation of a wind power generator.

Front view of a both-end fixed wing type wind power generator “The front view of a both-end fixed wing type wind power generator indicates the direction of rotation”. Side view of a double-end fixed wing type wind power prime mover. A-A ′ sectional view of a both-end fixed wing “A-A ′ sectional view of a both-end fixed wing shown in FIG. 1”. An oblique view of a both-end fixed wing using a plurality of strength base materials "It is an oblique view of a both-end fixed wing using a plurality of strength base materials." Detailed view of rib part in FIG. 4 “Details of rib part in FIG. 4 are shown.” An oblique view of a both-end fixed wing having a divided blade surface “An oblique view of a both-end fixed wing having a divided blade surface.” A perspective view of a wing incorporating a variable pitch mechanism in part "A perspective view of a wing incorporating a variable pitch mechanism in a part of a both-end fixed wing having a divided blade surface." Slope view of a wing whose pitch is stalled by a variable pitch mechanism "It is a perspective view of a wing whose pitch is stalled by incorporating a variable pitch mechanism into a part of a fixed wing with split blade surfaces."

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Strength base material 2 Blade surface 3 Rear hub 4 Nose 5 Strut 6 Rotating shaft 7 Tail 8 Strength base material 9 Blade surface 10 Rib 11 Strength base material 12 Rib 13 Blade surface 14 Blade incorporating a variable pitch mechanism

Claims (1)

In a wind power generator that fixes both ends of a blade to the shaft, one or more high-strength materials with a thickness of 1.5% or less of the maximum blade width are arranged on the leading edge side of the blade, and this is used as a strength base material in the blade width direction. A method for producing a wing, comprising arranging a face material.

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