CN201184273Y - Flow concentration type wind duct - Google Patents

Abstract

A flow-concentrating wind drum relates to a wind power generating device, in particular to a wind-drive device of the wind power generating device. The flow-concentrating wind drum is characterized in that the wind drum is typhoon-shaped; a rotating wheel is mounted at the small opening end of the flow-concentrating wind drum; the flow-concentrating wind drum is additionally mounted on the wind power generating device, thereby better enhancing the efficiency of the wind-energy generation, reducing the volume of the wind power generating device, and expanding the application scope of the power generating device. The wind drum has the increasing effect at a wind speed, and also can generate power particularly when wind power is weak.

Description

The collecting type air duct

Technical field

The utility model relates to a kind of wind generating unit, is specially the wind-drive device of wind generating unit.

Background technique

Wind is the most familiar natural phenomenon in our daily life, and tellurian wind is that solar radiation causes the earth surface atmospheric layer inequality of being heated, and causes the atmospheric pressure skewness.Under the differential pressure effect, the motion of air along continuous straight runs just forms wind, and the kinetic energy that air flows produced is exactly wind energy.Wind energy is a kind of most active renewable energy sources, therefore we can say that also wind energy is a kind of inexhaustible energy.And the mineral fuel energy such as oil, coal, natural gas in the utilization process, can give off carbon dioxide CO ₂, sulfur dioxide SO ₂, nitrogen oxide NO _xCarbon monoxide CO; dust or the like; cause greenhouse effect; phenomenons such as acid rain; the serious environment pollution and the destruction ecological balance; this makes the ice sheet area of two polar regions, north and south dwindle; the snow mountain snow melt region of Tibet plateau increases, and the ruined area of the overhead ozonosphere in polar region is enlarging, and these have all beaten alarm bell to us; people must utilize reproducible wind energy as soon as possible; solar energy; Wave energy etc.; reduce and use oil; coal; the fossil energy that natural gas etc. are non-renewable, and the exploited quantity of fossil energy is very limited, to human existence; development and energy demand have proposed the serious crisis warning.

Through probing into of field investigation and technical data, recognize that the wind energy resources of our country is very abundant, about 2.5 hundred million kilowatts of developable electric motor power, occupy first place in the world, but our national actual wind-power electricity generation electric motor power only accounts for 0.11% of national electric power installation, the wind-power electricity generation development potentiality is huge.

Use wind electricity generating system more widely at present, for the form of collecting folk songs of cloverleaf in the majority, but along with the generate output of electricity generating device constantly increases, the blade diameter of cloverleaf blower fan must be done very greatly, with the expansion area of collecting folk songs, increase generated energy, calculate according to data, if do the wind-driven generator of 3 megawatts, then its fan blade diameter will reach 100 meters, and purpose is to increase blade tip peripheral speed, wind-connector mounting support pylon, it is comparable to the height of " Washington, DC memorial tower " highly, and promptly total height is 150 meters.This obviously is impracticable scheme.

The model utility content

The purpose of this utility model is to provide a kind of collecting type air duct that is applied to wind cylinder type wind power generating device, can collect the energy in the very weak wind well, improves the generate output of wind generating unit.

Collecting type air duct provided by the utility model, can realize by the following technical solutions:

The collecting type air duct is applied to wind generating unit, and wind generating unit has generator, storage battery.

The collecting type air duct is characterized in that, described collecting type air duct has the air duct of typhon shape; The osculum end of air duct is equipped with runner; Described runner is horizontal multiple-blade runner, and runner connects generator by driving mechanism, and the exhaust outlet of collecting type air duct is rectangle.

Described air duct is by the aluminum alloy material manufacturing.

The first, the air duct of collecting type air duct is the cylinder that adopts a typhon pattern, enlarges the collection area of intake grill to wind, significantly improves the wind speed at exhaust outlet place, can not only solve the problem that wind can not generate electricity when weak, and can both use under multiple situation.The design capacity of this wind generating unit is 500 watts, and through calculating as seen, air duct of the present utility model improves 11.29 times to wind speed.

$=\frac{\mathrm{\π}{R}^2}{B\×C}\×80\%$

$=\frac{3.1416\&times;0.562{\mathrm{<figure-callout\; id="2"\; label="m"\; filenames="Y20082005721500091.png,Y20082005721500092.png"\; state="\{\{state\}\}">m</figure-callout>}}^2}{0.5m\&times;0.25m}=11.29$

In the following formula, R ²Be (the m of 0.75 meter of intake grill radius ²)

B-is the long limit 0.5m of exhaust outlet rectangle

C-is the broadside 0.25m of exhaust outlet rectangle

η-utilization factor is 80%

The wind speed of design intake grill is 4m/s, i.e. V ₁=4m/s

The wind speed that the wind speed of exhaust outlet equals intake grill multiply by raising wind speed multiple, i.e. the wind speed V of exhaust outlet ₂=4m/s * 11.29=45.19m/s flows through the (m perpendicular to wind speed sectional area A in the unit time ²) wind energy:

Wind energy ω=1/2 ρ V ³A

In the following formula: ρ-be air density kg/m ³

V-is wind speed m/s

A-is the m of sectional area unit ²

ω-wind energy unit is kg, m ², s ^-3(being W)

From above-mentioned wind energy formula W=1/2 ρ v ³A increases swept area of rotor A and can increase the wind energy that is obtained with raising incoming flow wind speed V as can be seen.

Following formula wind energy formula, divided by corresponding area A, just obtain the wind energy density formula, it is air-flow vertical wind energy by unit cross-sectional area in the unit time.

$\mathrm{\&omega;}=\frac{1/2\mathrm{\&rho;}{v}^{3}A}{A}=1/2\mathrm{\&rho;}{v}^3$

Air density ρ is an air pressure, the function of temperature and temperature, and the air density of different regions is all inequality, can table look-up and learn the numerical value of ρ.

Altitude and barometric pressure, atmospheric density relation [15 ℃=288k of atmospheric temperature]

The wind energy of this project air duct exhaust outlet is:

W＝1/2ρV ³A

＝1/2×1.224×45.19 ³×3.14×(0.5 ²-0.45 ²)×1/5

＝1685.59W

In the following formula: ρ---in Shanghai, atmospheric density gets 1.224

V---for after the speed-raising of air duct afflux, the exhaust outlet wind speed

A---be swept area of rotor, this project adopts the cross-flow type multiblade impeller, and swept area of rotor is an annulus, exradius 0.5m, and interior circle radius 0.45m, the area of wind on wind wheel is 1/5 of whole annulus

No matter from above-mentioned wind energy formula W=1/2 ρ V ³A or wind energy density, formula W=1/2 ρ V ³In can see, because of V ³Cause, promptly there is being a spot of increase can cause that a large amount of increases is arranged on the wind speed on wind energy, the method of the air duct collection wind of this Project design increases the air duct air-admitting surface, dwindle the exhaust outlet area, thereby strengthen wind speed and improve multiple, just improve the exhaust outlet wind speed, promptly reached the crucial purpose of amplifying wind speed.

The second, adopt the air duct of loudspeaker form, its exhaust outlet is made rectangle and is dwindled the useful area of exhaust outlet, so that the wind speed of exhaust outlet improves, and the making full use of of wind energy, remove to blow the cross-flow type multiblade impeller.The friction factor of this impeller is little, light self-weight, long service life, design with this and to overcome that the cloverleaf fan blade is easily fractureed by high wind and the problem that can not generate electricity, cross-flow type multiblade impeller of the present utility model, this has determined that also the air duct exhaust outlet is a rectangle, thereby to reach the purpose that coupling fully makes full use of wind energy, the running shaft of this wind energy conversion system is vertical with wind direction.Because dwindling of exhaust outlet area, by calculating as can be known, wind energy density is the key parameter of evaluation wind-driven generator acting ability, wind speed V ₂High more, the wind energy that wind-driven generator may extract is big more, and becomes three cubed relation.

In order when wind speed is low, further to increase distinguished and admirable density, the flow guide device that can change the exhaust outlet size is set at collecting type air duct mid-rear portion.

The utility model can improve the rotating speed of cross-flow type multiblade impeller effectively, improves generated energy with this, increases economic efficiency.

Beneficial effect:

The collecting type air duct is installed at the efficient that can well improve wind energy power on the wind generating unit, reduces the wind generating unit volume, enlarges the wind generating unit application area.

Description of drawings

Fig. 1 is the utility model overall structure schematic top plan view;

Fig. 2 is this practical property overall structure schematic side view.

Embodiment

For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.

With reference to Fig. 1, wind generating unit has generator, storage battery.The collecting type air duct has air duct 1 and is fixed on the rotatable rotating disk 5; The small end of air duct 1 is equipped with wind vane 2.The exhaust outlet 3 of air duct 1 is a rectangle.。The runner that be equipped with at air duct 1 rear portion is horizontal multiblade impeller 4.Wind vane 2 is fixedly mounted on air duct 1 exhaust outlet, the extended spot behind the afterbody.

One, air duct 1, uses the aluminum alloy material manufacturing, gets little, the cheap characteristic of its density, and coats anticorrosive coating inside and outside air duct, to improve working life.

Two, be coupling cross-flow type multiblade impeller 4, the exhaust outlet 3 of wind energy conversion system is made rectangle, so that the wind energy of exhaust outlet 3 is fully utilized.Because in the geometric figure, the area maximum of circle is so that intake grill is done is circular, to enlarge the collection area of intake grill to wind energy again.Area with dwindling exhaust outlet 3 improves wind speed, has promptly improved the generating efficiency of wind electricity generating system, improves the output quantity of electric energy.

This measure is especially as hydraulic turbine generator, utilize reservoir filling, it is poor to flood, thereby improved the driving force of water,, utilized at little electrical signal of base stage input again especially as transistor to hydraulic turbine generator, just can be at emitter to producing tens times of electrical signal between the collector electrode to hundred times greater than base input signal, reach the amplification of signal, collecting type air duct of the present utility model also is based on above thinking, and the collecting type air duct has amplification to wind speed.As everyone knows, if collecting the fan blade blade that wind-force kinetic energy into all is rotated, the intake grill of horn collecting type air duct absorbs, the air of cross-flow type wind wheel back is just motionless so, however air can not stop fully, so the efficient of wind energy conversion system is always less than 1.

Cross-flow type wind wheel power absorbed from air duct can be calculated with following formula: P=1/2CpA ρ V3

P-is the power of wind wheel output in the following formula

Cp-is the power factor of wind wheel

Cp.max＝0.593

A-is a swept area of rotor

R-is the wind wheel radius

V-is a wind speed

ρ-be air density

Following formula is as seen: the output power of wind wheel and wind speed cube be directly proportional and air density and swept area of rotor are directly proportional, so the diameter of cross-flow type multiblade impeller 4 is designed to 50cm.

Three, adopt cross-flow type multiblade impeller 4 can alleviate impeller from weight and reduce the friction factor of wheel rotation system, and cross-flow type multiblade impeller 4 is firm, is difficult for being fractureed.Impeller adopts the Stainless Sheet Steel manufacturing, rotating shaft is partly closed lubricated with bearing bush, axle passes through coupling, connect raising speed gearbox and mag-dynamo, because cross-flow type multiblade impeller 4 rotating speeds own are very high,, reduced gear-driven progression so the raising speed scope of raising speed gearbox can be less, thereby reduced the friction factor of system, reduced volume, weight and the manufacture cost of raising speed gearbox.

Four, with reference to Fig. 1, adopt the self method of wind vane, wind vane 2 is fixedly mounted on collecting type air duct exhaust outlet afterbody.The extension tail vane length of wind vane 2 is 2.8 meters, and average wide is 0.95 meter, and the tail vane useful area is greater than air-admitting surface.The stretching, extension tail vane of wind vane 2 is installed on the framework platform, more helping the rotatable dish of going up is driven by wind vane 2, make intake grill can both follow the tracks of, aim at the air intake direction all the time, thereby improve the wind energy utilization of wind electricity generating system and improve generating efficiency, substitute the device that follows the wind of present wind-driven generator complexity with this, save the cost and the maintenance expenses of wind energy generating plant.

Wind vane 2 is simple and practical, wind vane 2 employing aluminum alloy material manufacturings, and can dismantle easily and install.

More than show and described basic principle of the present utility model and major character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the specification just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.

Claims (3)

1, the collecting type air duct is characterized in that, described collecting type air duct is a typhon shape; The osculum end of collecting type air duct is equipped with runner.

2, collecting type air duct according to claim 1 is characterized in that, described runner is horizontal multiple-blade runner, and runner connects generator by driving mechanism.

3, collecting type air duct according to claim 1 is characterized in that, described collecting type air duct has exhaust outlet, and exhaust outlet is a rectangle.

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