CN103009636A - Manufacturing method of fan blade and special prestress applying device thereof - Google Patents

The invention discloses a manufacturing method of a fan blade. During the process of laminating and laying a single-axial fiber fabric, prestress is applied to the single-axial fiber fabric through utilizing a prestress applying device fixed on a blade mold, and then reinforcement resin filling is carried out. The invention also discloses the prestress applying device for implementing the method. Two ends of the single-axial fiber fabric are fixed on a tightening rod of the single-axial fiber fabric, then the tightening rod of the single-axial fiber fabric is placed on clamping grooves at two ends of a tightening rod fixing plate again, and the position of the tightening rod of the single-axial fiber fabric is regulated through a prestress regulating mechanism, so that the single-axial fiber fabric generates stress; and through the method and the device, the integral mechanical property and the fatigue property thereof of a single-axial composite material are improved effectively; by adopting the fan blade manufactured by the single-axial composite material with prestress, the static intensity and the fatigue intensity of the blade can be improved effectively, and the light weight efficient design of the blade is realized.

A kind of manufacture method of fan blade and special-purpose prestress application device thereof

Technical field

The present invention relates to fan blade and make the field, particularly, relate to a kind of manufacture method and special-purpose prestress application device thereof of fan blade.

Background technology

Shine upon earth surface, the earth surface difference of being heated everywhere produces the temperature difference, thereby the convective motion that causes atmosphere forms wind, and its energy that carries is wind energy.Thereby the moving blower fan rotation of wind drives the generator rotary electrification and claims that wind-power electricity generation is wind-powered electricity generation.Wind energy is a kind of reformulations of solar energy, is a kind of renewable natural energy resources that does not produce any disposal of pollutants.Compare with solar energy, biology, underground heat and power generation with marine energy, wind-powered electricity generation is current techniques and the new forms of energy of tool commercial scale exploitation condition economically.The wind wheel of modern blower fan is comprised of three blades mostly because the blower fan power output is directly proportional with the wind sweeping area of blade, and with cube being directly proportional of wind speed, so the blade of high-power blower is often very huge.The fan blade length of a 5MW surpasses 60 meters, and it is high that the blower fan height surpasses 20 floors.8MW fan blade in the external research and development reaches 80 meters especially, and the blower fan height has reached 131 meters.The blade of following blower fan will be more and more longer.

Fan blade is mainly made by fiber-resin composite at present, and wherein fiber mainly is glass fibre or carbon fiber.The version of blade is mainly by girder, and web and covering form.Covering is by seldom which floor fiber cloth therebetween light material, and such as structural foam panels, light bamboo clappers or cork wood are made.Girder provides Rigidity and strength for the structure of blade, and the fiber laying of general girder is thicker, is laid in the mould by craft or machinery, pours into manufacturing.

Existing single shaft mostly is craft or machinery is laid in the blade mold to composite in manufacture process, glass fibre or carbon fibre fabric have unavoidably some small bendings and exist in process of deployment, and these mechanical properties for the fiber-resin composite of finished product have produced adverse influence.

Summary of the invention

The object of the invention is to overcome the shortcoming and defect of above-mentioned prior art, a kind of manufacture method of fan blade is provided, single shaft is reduced or disappearance to the slight curves of fabric in laying, thereby solve the problem that single shaft reduces to composite materials property in the present common technology scheme, the Effective Raise single shaft is to the whole mechanical property of composite, and its fatigue properties of Effective Raise.

Another object of the present invention is to provide a kind of prestress application device of realizing in the above-mentioned fan blade manufacture method.

To achieve these goals, the present invention adopts following technical scheme:

A kind of manufacture method of fan blade, be included in and carry out single shaft on the blade mold to the stacked laying of fabric, and then strengthen resin perfusion, at described single shaft in the fibre fabric stacking process of deployment, the prestress application device that is fixed on the blade mold by utilization applies prestressing force to single shaft to fabric, and then carries out described perfusion.

Realize the prestress application device in the above-mentioned fan blade manufacture method, comprising:

Many to single shaft to the fabric tie rod, every pair is respectively applied to fixing and tension single shaft to the two ends of fabric, and described single shaft to the length of fabric tie rod greater than the width of single shaft to fabric.

Two tie rod fixed heads, be fixedly mounted in the described blade mold, axially arrange along blade mold respectively, spacing distance between two is equal to or greater than single shaft to the width of fabric, and described tie rod fixed head two ends are provided with respectively a plurality of for placing the draw-in groove of single shaft to the fabric tie rod from the bottom to top.

The prestressing force governor motion, be installed on the tie rod fixed head, and the every pair of single shaft to the fabric tie rod at least to a prestressing force governor motion should be arranged, described prestressing force governor motion be used for regulating single shaft to the fabric tie rod on the tie rod fixed head the position and lock its position.

Further, described single shaft is round bar to the fabric tie rod.

Further, respectively stepped distribution of the draw-in groove at described tie rod fixed head two ends.

Further, described prestressing force governor motion comprises that the prestressing force adjusting rod reaches and the thrust of prestressing force adjusting rod mating reaction applies and measurement component.

Further, described thrust applies and measurement component is hydraulic pressure or powered version.

Because adopt technique scheme, the present invention has following beneficial effect:

1, in the manufacture method of fan blade, the present invention is by applying prestressing force to single shaft to fabric at single shaft in the fibre fabric stacking process of deployment, single shaft is reduced or disappearance to the slight curves of fabric in laying, thereby solved the problem that single shaft reduces to composite materials property in the present common technology scheme, Effective Raise the whole mechanical property of single shaft to composite, and Effective Raise its fatigue properties; Adopt the above-mentioned fan blade of making to composite with prestressed single shaft, static strength and fatigue strength that can the Effective Raise blade be realized the light weight efficient design of blade.

2, the present invention carries out prestress application to single shaft to fabric by the prestress application device that is fixed in the blade mold, single shaft is fixed on single shaft on the fabric tie rod to the fabric two ends, be placed on single shaft on the draw-in groove of tie rod fixed head to the fabric tie rod again, by the prestressing force governor motion, regulate single shaft to the position of fabric tie rod, thereby make single shaft produce suitable prestressing force to fabric, effectively improved the whole mechanical property of single shaft to composite, and Effective Raise its fatigue properties.

Below by drawings and Examples, technical scheme of the present invention is described in further detail.

Description of drawings

Fig. 1 is to the fabric schematic diagram with prestressed single shaft;

Fig. 2 is that single shaft is to the laying structural representation of fabric;

Fig. 3 is prestress application apparatus structure schematic diagram;

Fig. 4 is the partial structurtes enlarged diagram among Fig. 3;

Wherein, the 1-single shaft is to fabric, and the 2-single shaft is to the fabric tie rod, 3-tie rod fixed head, and 4-prestressing force adjusting rod, 5-thrust applies and measurement component.

The specific embodiment

Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for description and interpretation the present invention, is not intended to limit the present invention.

Existing fan blade manufacture method, key step is included in carries out single shaft to the stacked laying of fabric on the blade mold, and then strengthen resin perfusion, adopt said method, single shaft can produce slight curves to fabric in laying, cause single shaft to reduce to composite materials property.

The manufacture method of a kind of fan blade of the present invention, said method is improved, mainly be at described single shaft in the stacked process of deployment of fabric (glass fibre or carbon fibre fabric), the prestress application device that is fixed on the blade mold by utilization applies prestressing force to single shaft to fabric, and then carries out described perfusion.

Shown in Fig. 1-4, realize the prestress application device in the above-mentioned fan blade manufacture method, comprising:

In the above-described embodiments, respectively stepped distribution of the draw-in groove at tie rod fixed head 3 two ends.

It should be noted that at last: the above only is the preferred embodiments of the present invention, be not limited to the present invention, although with reference to previous embodiment the present invention is had been described in detail, for a person skilled in the art, it still can be made amendment to the technical scheme that previous embodiment is put down in writing, and perhaps part technical characterictic wherein is equal to replacement.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.