CN202326042U - 2.0-megawatt II-class wind filed high-rotation speed blade of direct-driving type wind driven generator - Google Patents

Abstract

The utility model provides a 2.0-megawatt II-class wind filed high-rotation speed blade of a direct-driving type wind driven generator, which is formed by paving glass fiber cloth for attaching a blade mould. A glass fiber main beam with high modulus is paved in the middle of a blade casing, polyvinyl chloride (PVC) foam is paved on two sides of the main beam, the blade is manufactured by vacuum resin infusion, and the length of the blade is 42.5m. The length of the blade is increased, so that power of the blade is increased, the blade can be used in the wind field with relatively low wind speed, and the designed power can be achieved. In addition, by means of the improvement on the wing section, the rotation speed of the blade is increased from normal 17 rpm to 19 rpm, volume and weight of the direct-driving type wind driven generator are reduced, and production cost is reduced.

Description

A kind of 2.0MW II class wind district high rotating speed direct-drive aerogenerator blade

Technical field

The utility model relates to a kind of blade of wind-driven generator, particularly a kind of 2.0MW II class wind district high rotating speed direct-drive aerogenerator blade.

Background technique

Wind energy is reproducible green energy resource, and the field that Wind Power Utilization belongs to the state key support at present also is an emerging industry, and China is an energy demand big country, therefore greatly develops wind-powered electricity generation and meets national relevant policies with following national to demands for energy.Fan blade belongs to one of whole wind power generating set three big parts (generator, tower tube, fan blade), is the equipment of directly catching wind energy, so its profile, and the design of aspects such as size has material impact to the generated output of generator.Fan blade has experienced from wooden blade to the metallic blade; Arrive the process of glass fiber reinforced plastics composite material system blade again, rely on advanced scientific knowledge, fluid mechanics by now from the initial blade of making by rule of thumb; Engineering science, knowledge such as aerodynamics are carried out the process of the design of science.Blade Design not only has the design of profile also to comprise the design of mechanical structure mechanical strength.Experienced from diameter little to several meters by now greatly to the process of the blade of 60,70 meters of diameters, all these is in order to make Blade Design reach the highest to Wind Power Utilization, energy consumption to be dropped to minimum.According to the assessment of relevant departments, wind is divided into four types to global wind-resources: one type of wind district (>=10m/s), two types of wind districts (10m/s >=v >=8.5m/s), three types of wind districts (8.5m/s >=v >=7.5m/s), and four types of wind districts (7.5m/s >=v >=6.0m/s).In all kinds of wind district, also different to the requirement of blade, therefore need satisfy various different demands, the blade in different wind district.Our original blade is 40 meters long, and length is shorter, and wind catching area is little, and is more straight, so require big requirement of rigidity that the bigger shear web of strength and stiffness is arranged, does not have pre-bending.It is to be applicable to the blade that uses in one type of wind district in addition, and wind speed is had relatively high expectations, and in a single day wind speed reduces, and generated output reduces, and just causes system to abandon wind easily, even off-grid, influences the normal operation of whole electrical network.The inner graphite fiber beam that adopts is as main stress members, and total institute is known, and the price of graphite fiber is obviously expensive a lot of than glass fibre, has so just increased cost.

The model utility content

In order to overcome the technical problem that exists in the existing technology, the utility model provides a kind of 2.0MW graphite fiber blade of wind-driven generator, and root of blade adopts ultra thickness ratio design; Shop number of layers through increasing the root glass fiber cloth increases thickness; Thickness ratio has increased, and causes under the situation of root load increase the increase of offsetting load through the root increase in the leaf weight increase; Blade tip adopts flexible design then, reaches the purpose of further reduction blade loading.

To achieve these goals, the utility model adopts following technological scheme:

A kind of 2.0MW II class wind district high rotating speed direct-drive aerogenerator blade; Said blade is laid by the glass fiber cloth of applying blade mold and is formed; The glass fibre girder of lay high-modulus in the middle of the blade shell; The girder both sides are equipped with the PVC foam, and blade adopts vacuum infusion resin to process, and the length of said blade is 42.5 meters.

Further, the glass fibre girder of suction surface blade shell is fixedly connected web through adhesive, and the two ends of web are fixed on the glass fibre girder of pressure/suction surface.

Further, the root wall thickness of said blade is 100mm, and the maximum chord length of blade is 3.4 meters, and the maximum pre-bending of blade is 2 meters,

The beneficial effect that the utility model brought is:

1, length of blade increases, and wind sweeping area increases, and the wind energy of obtaining just increases, so increased blade power, blade just can use in the relatively low wind district (wind field) of wind speed like this, the power in the time of also reaching design.

2, through the improvement of aerofoil profile, improved the rotating speed of blade, bring up to 19rpm by common 17rpm, reduced the volume and weight of direct drive generator, reduce cost of production.

Description of drawings

Fig. 1 the utility model blade pressure surface structural representation

A-A cross section structure schematic representation among Fig. 2 Fig. 1

Fig. 3 the utility model root of blade partial section

The largest chord schematic representation of Fig. 4 the utility model blade

The maximum pre-bending schematic representation of Fig. 5 the utility model blade

Label is among the figure:

1-glass fibre girder 2-web

Embodiment

Following facing combines accompanying drawing that the preferred embodiment of the utility model is done to set forth in detail, thereby so that advantage of the utility model and characteristic can be easier to it will be appreciated by those skilled in the art that the protection domain of the utility model made more explicit defining.

As shown in Figure 1 is the demifacet housing of a kind of 2.0MW II class wind district high rotating speed direct-drive aerogenerator blade; Said blade is laid by the glass fiber cloth of applying blade mold and is formed; The glass fibre girder 1 of lay high-modulus in the middle of blade shell; The girder both sides are paved with the PVC foam, with behind the glass fiber cloth covering whole blade housing, utilize vacuum infusion resin to process blade half afterwards.After treating that blade Procuring in mould is accomplished; Prefabricated profiled web 2 usefulness adhesives are separately fixed on the glass fibre girder 1 of SS (suctionside is translated into suction surface) face blade shell; And PS (pressure side is translated into pressure side) face blade shell upset is combined on the SS face; The two ends of web 2 are fixed on the glass fibre girder 1 of PS/SS face, as shown in Figure 2.Shown in Figure 3 is the root portion sectional view of the utility model blade, and its root wall thickness has reached 100mm, shown in Figure 4 for the maximum chord length of the utility model blade be 3.4 meters.Shown in Figure 5 for the maximum pre-bending of the utility model blade be 2 meters.

The performance of the said blade of the utility model and technical order

Length of blade: 42.5m; Leaf weight: 8250 ± 150kg; Incision wind speed: 3.0m/s; Cut-out wind speed: 25.0m/s; Rated wind speed: 11.0m/s; Extreme wind speeds: 59.5m/s; Rotor diameter: 87.74m; Leaf longevity: 20 years; Be suitable for wind scale: IEC IIB.

The above; Be merely one of embodiment of the utility model; But the protection domain of the utility model is not limited thereto; Any those of ordinary skill in the art are in the technical scope that the utility model disclosed, and variation or the replacement that can expect without creative work all should be encompassed within the protection domain of the utility model.Therefore, the protection domain of the utility model should be as the criterion with the protection domain that claims were limited.

Claims (3)

1. 2.0MW II class wind district high rotating speed direct-drive aerogenerator blade; Said blade is laid by the glass fiber cloth of applying blade mold and is formed; It is characterized in that, the glass fibre girder of lay high-modulus in the middle of the blade shell, the girder both sides are equipped with the PVC foam; Blade adopts vacuum infusion resin to process, and the length of said blade is 42.5 meters.

2. a kind of 2.0MW II class according to claim 1 wind district high rotating speed direct-drive aerogenerator blade; It is characterized in that; The glass fibre girder of suction surface blade shell is fixedly connected web through adhesive, and the two ends of web are fixed on the glass fibre girder of pressure/suction surface.

3. a kind of 2.0MW II class according to claim 1 wind district high rotating speed direct-drive aerogenerator blade is characterized in that the root wall thickness of said blade is 100mm, and the maximum chord length of blade is 3.4 meters, and the maximum pre-bending of blade is 2 meters.

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