CN101907057A - Ring-film blade type windmill - Google Patents

Abstract

A ring framework 1, a rotating shaft 4 (center fixing part) and a plurality of ribs 2 (similar to spoke-shaped members) with stretching function between the framework and the rotating shaft form a mutually crossed and connected structure so that the ring framework and the rotating shaft mutually keep fixed relative positions; and by using a spatial position relationship naturally generated between the ribs, a thin cloth-like material 3 (film) is hung on the ribs serving as a skeleton to form blades of a windmill. The windmill members manufactured by the technology adopt a pure stretching stress structure so as to avoid thick and heavy supporting members used for bearing great bending stress in a conventional constitutive mode and greatly reduce the whole weight of the windmill. Therefore, a large amount of manufacturing and construction costs can be saved, and more important, the windmill reduces the rotary inertia generated during rotating so that the windmill is easier to adapt to the change of wind direction and the utilization efficiency of wind energy is improved. Moreover, because of the adoption of a multi-blade structure, the rotating torque of the windmill is greatly improved; and particularly, the energy of the medium and low wind speed can be fully utilized so that the region unsuited for constructing a wind energy utilization device in the past can benefit the human being by using the wind energy.

Description

Ring-film blade type windmill

[technical field]

The present invention is partly being the technology of object about the windmill in the wind power plant

[background technique]

At present the wind energy conversion system (windmill) that generally adopts mostly is that the actinoid blade of installing constitutes on turning axle.The required stress that bears mainly is made of two-part on these blades: the first will be born because be subjected to the effect of blast, and blade is pushed downstream direction aweather and is bent the active force that fractures; Its two, bear the turning effort power that the promotion because of wind-force produces, this active force is the needed power of pushing generator output electric energy.These two kinds of active forces all belong to crippling stress, and from mechanical angle of mechanics, for bearing crippling stress, the mechanical realization key element must have enough big tolerance intensity just may.For satisfying the enough construction material intensity of these condition needs, adopt cross-sectional area huge on the member stress direction in addition.Just because of this reason must have to cause very sturdy blade by the designed windmill of existing technology, thereby these blades all has to become super heavy parts.For supporting these heavy members, the parts around the windmill, such as rotating shaft and bearing, the base of supporting shaft all needs to have high intensity, thus have to do both massive shape.

The weight of windmill is not only the problem of a manufacture cost, the more important thing is that heavy windmill can produce powerful rotatory inertia when rotated, and the phenomenon that this rotatory inertia is taken place when rotating as gyro, can hinder the sensing that windmill changes rotating shaft, thereby windmill is difficult to adjust at any time sensing to adapt to the variation of wind direction.As everyone knows, wind direction is to change at any time, if can not positive meet the flow direction aweather, windmill just can not obtain maximum wind energy, thereby can not get best Wind Power Utilization effect.Thereby the light of windmill weight has fundamental influence to the efficient of windmill.

Because air vane need have enough intensity, thereby is to be prefabricated in the factory to be integral the type member mostly, directly is transported to the infield by high capacity waggon.Along with the maximization of windmill, the length of windmill often reaches tens of rice, weighs several tons.Will be length like this and heavy parts are transported to the place of using wind energy, such as the mountain area, places such as desert, the road of the high capacity waggon that at first must construction can pass through could be realized.If the component parts of windmill can directly be assembled at the scene, above-mentioned system limit just can be broken, thereby easier popularization of wind technology used.

In order to reduce the weight of windmill, existing technology is used reinforced plastics mostly, makes the blade of windmill such as glass fibre reinforced plastics.This material often belongs to non-conducting material, and in the season and the area of thunderstorm pilosity, the windmill of this material is attacked by thunder and lightning often and is damaged.Up to the present, the shocking preventing technology of windmill remains the difficult point that wind power plant is used.

[summary of the invention]

Use ring framework 1, the some ribs 2 (being similar to spoke-like member) that have stretching action between turning axle 4 (center fixing part) and framework and the rotating shaft constitute the structure that intersects mutually, connects, the relative position that ring framework and rotating shaft are maintained fixed mutually; Utilizing spontaneous spatial relation between the rib, is the material 3 (film) that skeleton is hanged up thin dry goods with the rib, thereby constitutes the blade of windmill.

The active force of supporting blade used in the present invention, the active force of first rib belongs to pure extension stress.It two is the arched stress of annulus framework, if the quantity of rib is abundant, the crippling stress that acts on the annulus is cancelled out each other to a great extent with the reaction force that is produced from the rib pulling force, thereby the requirement of tolerance crippling stress is reduced greatly.Therefore the skeleton of windmill can constitute with thin thin and light material, the member of windmill and supporting windmill can alleviate significantly, construction and manufacture cost have not only been reduced, and the rotatory inertia of light windmill is reduced significantly, the easier adjustment of windmill is pointed to adapting to the variation of wind direction, thus can be to improve the utilization ratio of wind energy.

Constitute the basic building block of present technique supporting blade, promptly skeletal structure be subjected to cycle wheel mode of structure inspiration and come.As mentioned above, avoided the generation of crippling stress, thereby can be made into high-intensity mechanical structure with few material by the member that this mode of structure constituted.So as means of transportation easily, bicycle is widely used for a long time, can bear hundreds of kilograms load, adapt to harsh pavement conditions, obtained general trust in this world.Especially the athletic type bicycle still can tolerate violent sports competition in textural light-weight design in addition dramatically, has proved absolutely the science and the reliability of this structure.Make example with 26 inches cycle wheels, its spoke number is 36, and per 4 is one group, and left-right and front-back intersects, and the standing part of rim and bearing is coupled together.Since about interleaved structure, make about bearing evenly stressedly, thereby keep axletree and rim on left and right directions, not to deform.And the front and back interleaved structure of spoke has kept axletree and rim not to be offset in a circumferential direction.

Owing to adopted this structure, the windmill skeleton of present technique is able to not only light but also firm, thereby much more superior than existing technology.Especially adopted this structure, the plane that connects per 2 ribs spatially forms a kind of natural distortion form.Utilize this distorted shape, between per 2 ribs, hang up the material of film shape, can constitute the blade of windmill.Because the very light in weight of film itself, all weight of windmill almost is equivalent to the weight of skeleton itself, and as previously discussed, windmill is made not only light but also firmly.The quantity of rib can reach tens of in addition, thereby the quantity of blade can do a lot, thereby is easy to realize multi-bladed windmill, obtains being far longer than the rotary impetus of existing windmill, wind energy that can the low wind speed state of more efficient use.Especially above-mentioned blade (film) can be designed to be able to according to the wind speed power, regulate the degree that film stretches along the flexible structure of rib, just can regulate the wind-exposuring area that bears wind-force, thereby obtain to adapt to the ability of wind-force power.

The formed intensity of the windmill constituted mode of present technique structure is only relevant with the use material, less demanding to manufacture method.So the basic building block that constitutes annulus and rib can be transported to the erecting bed fully assembles.Thereby, wind power plant can easierly be set, thereby the popularization and application wind energy is had promotion and the economic effect that is difficult to estimate the place of those natural condition harshnesses.

Because the framework of windmill is used light metallic material to constitute, make windmill have the ability of powerful tolerance thunder and lightning infringement, thereby more help applying of windmill technology.

[description of drawings]

The present invention is partly being the technology of object about the windmill in the wind power plant: ring-film blade type windmill, the required stress that bears mainly is made of two-part on this blade: the first will be born because be subjected to the effect of blast, and blade is pushed downstream direction aweather and is bent the active force that fractures; Its two, bear the turning effort power that the promotion because of wind-force produces, this active force is the needed power of pushing generator output electric energy.

1. annular frame

2. rib

3. constitute the thin-film material of blade

4. rotating shaft and center fixing part

[embodiment]

The annulus that constitutes the windmill framework adopts the high-strength light metal pipe as far as possible, and the rib that connects annulus framework and center fixing part adopts the less high-strength material of dilatation as far as possible.Small-sized windmill can be with the parts of similar bicycle spoke, and large-scale windmill then can be used wirerope.Establish to adjust the mechanism of tension force the outer end of rib, so that adjust the shape of windmill integral body, and can adjust the variation that is offset the tension force power of being brought with adaptive temperature at any time.Can be with solid textile as the film of blade, in addition water-proofing treating is perhaps directly used the high plastic pellicle of tensile strength, with the reduction manufacture cost.If the use plastic pellicle then should be made regular check on replacing, avoid the aging and breakage that causes of film.If as midget plant,, can adopt fixed film blade owing to be convenient to safeguard.When breakage of thin film applied takes place, as long as change damaged part.For large-scale windmill, can adopt may command type blade extending means, according to the power of wind-force, adjust suitable blowing area, thereby obtain maximum energy, avoid device to suffer strong wind simultaneously and damage.

Claims (2)

1. By rise between the annular frame around center fixing part and its and center fixing part and the annular frame tens of of interconnect function uniformly-spaced, the windmill skeleton that constitutes of the rib that intersects of front and back; Utilize between these ribs formed place to close to tie up to the wind-force of hanging up the film shape between per two ribs and bear material, the air vane of formation; Utilize the acting in conjunction of the tensile stress of unique bearing of trend that bears on the rib and the arched stress on the annular frame to be guaranteed the high strength light weight windmill of feature of the high stability of windmill configuration.
2. 2. bear the controlling mechanism that material stretches along rib described in 1 by the film shape wind-force described in 1, i.e. the controlling mechanism of the area that bears the wind-force effect of air vane, thus realize the windmill structure of feature of the strong and weak function of adaptation wind-force of windmill.

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