CN201539360U

CN201539360U - Wind-powered blade with pressure-relief vents

Info

Publication number: CN201539360U
Application number: CN2009202184818U
Authority: CN
Inventors: 吴兆诚; 何智男
Original assignee: UNITED SHIP DESIGN AND DEVELOPMENT CENTER
Current assignee: UNITED SHIP DESIGN AND DEVELOPMENT CENTER
Priority date: 2009-10-14
Filing date: 2009-10-14
Publication date: 2010-08-04
Anticipated expiration: 2019-10-14

Abstract

The utility model discloses a wind-powered blade with pressure-relief vents. The wind-powered blade comprises a windward side and a leeward side positioned on the opposite side, a plurality of pressure-relief vents communicating the windward side and the leeward side are formed on the blade, and an automatic pressure-relief device is accommodated in the pressure-relief vents. Therefore, when the wind pressure applied to the windward side reaches a predetermined value, the automatic pressure-relief device is opened, so that airflow directly penetrates the blade through the pressure-relief vents, thereby relieving the wind pressure applied to the blade.

Description

Wind blade with vent

Technical field

The utility model is relevant with a kind of wind blade with vent.

Background technique

Along with appearing in one's mind of oil equal energy source crisis; existing various countries there's no one who doesn't or isn't go all out to research and develop new alternative energy source; as wind energy; solar energy; geothermal power; tidal energy etc.; wherein; wind energy is polluted because of having zero; low build the characteristic that is set to this and favored by various countries; see also shown in Figure 1; be a kind of wind-driven generator that has earlier, it includes a pylon 1, and the top of this pylon 1 is connected with a generator body 2; the front end of this generator body 2 is connected with one group of blade 3; with this, drive this blade 3 through wind energy and pivot, drive this generator body 2 running generatings; wind energy can be changed into electric energy, for use.Yet; though the number of this wind turbine power generation amount is directly proportional with wind speed; but excessive wind speed will cause these blade 3 rotating speeds too fast; make these generator body 2 over-runnings and burn; hereat; existing wind-driven generator all has automatic brake apparatus; will slow down automatically or shut down when wind speed surpasses predetermined value, to reach the protection effect, still this automatic brake apparatus can not alleviate the blast that this blade 3 is born; excessive wind speed still can cause damages such as this wind-driven generator generation leaf destruction; especially in the area that typhoon easily takes place, regular meeting sweeps up to the blast more than 10 grades, and wind direction changes unpredictably; more can cause serious threat to this wind-driven generator; therefore, how to research and develop a kind of decompressor, when wind speed is excessive, to start automatically; alleviate the blast that this wind-driven generator integral body is born, be necessary in fact.

The model utility content

The utility model provides a kind of wind blade with vent, this blade is set on the wind-driven generator, it includes the lee face that a windward side and is positioned at opposite side, and be provided with the vent of this windward side of a plurality of perforations and this lee face on this blade, and in these a plurality of vents, be provided with automatic pressure-reducing device.

With this, this wind blade that the utility model provides with vent, under usual state, this automatic pressure-reducing device block is sealed on this vent, and can not influence the running efficiency of this blade, and when wind speed is excessive, this automatic pressure-reducing device then can be opened, and makes air-flow directly pass this blade by this vent, to alleviate the blast that this blade is born, avoid excessive wind speed to cause the damage of this blade, even the accident that this wind-driven generator collapses takes place.

Description of drawings

Fig. 1 is the stereogram that has earlier.

Fig. 2 is the stereogram of preferred embodiment of the present utility model.

Fig. 3 is the local amplification view of preferred embodiment of the present utility model.

Fig. 4 is the use schematic representation of preferred embodiment of the present utility model.

Embodiment

See also Fig. 2 and shown in Figure 3, be the stereogram and the local amplification view of preferred embodiment of the present utility model, this wind-driven generator 100 includes a pylon 10, a generator body 20 and one group of blade 30, and this blade 30 is provided with a plurality of automatic pressure-reducing devices 40, wherein:

This blade 30 includes the lee face 32 that a windward side 31 and is positioned at opposite side, and be equipped with the vent 33 of this windward side 31 of a plurality of perforations and this lee face 32 on this blade 30, these a plurality of vents occupy the area of this windward side 315% to 20%, in present embodiment, these a plurality of vents 33 are set between the chord line (Chord line) and trailing edge (Trailing edge) of this blade 30, and axially equidistantly are provided with five vents 33 along this blade 30.

These a plurality of automatic pressure-reducing devices 40 are placed in the vent 33 of this blade 30, in present embodiment, this automatic pressure-reducing device 40 has a bearing 41, one valve rod 42 and two elastic components 43, wherein, this bearing 41 is fixedly arranged on the inwall of this vent 33, and the two ends of this bearing 41 are concaved with one along the axial symmetry of this vent 33 and hold groove 411, these a plurality of bottom surfaces of groove 411 of holding are further to being installed with the less axis hole of a diameter 412, again, this bearing 41 bores a hole 413 in the number that is equipped with that this holds groove 411 on every side, and, this valve rod 42 is arranged in the axis hole 412 of this bearing 41, and the two ends of this valve rod 42 respectively be formed with one with this vent 33 with the stopper part 421 of diameter, again, this valve rod 42 is formed with one in these a plurality of stopper parts 421 opposed inside and holds the shoulder 422 of groove 411 with diameter with this, and, these a plurality of elastic components 43 are sheathed on this valve rod 42, and be placed in this a plurality of holding in the groove 411 respectively, and the shoulder 422 that the two ends of this elastic component 43 are resisted against this valve rod 42 respectively holds on the bottom surface of groove 411 with this, to provide elastic force to this valve rod 42, make these a plurality of stopper parts 421 respectively the elasticity block be sealed in the two ends of this vent 33.

Please consult shown in Figure 4 simultaneously, when usual state, stopper part 421 blocks of this automatic pressure-reducing device 40 are sealed on this vent 33, and can not influence the running efficiency of this blade 30, and when wind speed surpasses predetermined value, the valve rod 42 of this automatic pressure-reducing device 40 will move to lee face 32 directions of this blade 30, open this vent 33, make air-flow directly pass this blade 30 by this vent 33, to alleviate the blast that this blade 30 is born,, can reach the damage that the wind speed of avoiding excessive causes this blade 30 with this, even the accident that this wind-driven generator 100 collapses takes place, certainly, when wind was attacked by the lee face 32 of this blade 30, the valve rod 42 of this automatic pressure-reducing device 40 will move to the direction of this windward side 31, to open vent 33, reach the effect of decompression.

Claims

1. wind blade with vent, it is characterized in that, include the lee face that a windward side and is positioned at opposite side, and be equipped with the vent of this windward side of a plurality of perforations and this lee face on this blade, and in these a plurality of vents, be provided with an automatic pressure-reducing device.

2. the wind blade with vent according to claim 1 is characterized in that, these a plurality of vents occupy the area of this windward side 5% to 20%.

3. the wind blade with vent according to claim 1 is characterized in that, these a plurality of vents are set between the chord line and trailing edge of this blade.

4. the wind blade with vent according to claim 1, it is characterized in that, this automatic pressure-reducing device includes a bearing, that is fixedly arranged on this vent inwall and is arranged at valve rod on this bearing, and the two ends of this valve rod are respectively to be formed with at least one shelves to end portion, and at least two be sheathed on this valve rod, and be positioned at the elastic component between these a plurality of stopper parts and bearing.