CN1560469A - Negative pressure wind wheel - Google Patents

Abstract

The invention is negative pressure wind wheel for absorbing low speed wind. The operating principle of the invention is: one single vane, double vanes, triple vane and quadruple vane structures form a turning straight cavity, the winds with different speed flow to the back of the wind wheel along the circle diameter of the wind wheel, at the same time, the external gas gathers at back of the wind wheel along the hyperbola regularly, forms a hollow cone air, then they are discharged, the wind flow around the wind wheel is pulled to the back of th4 wind wheel in tailwind, the negative pressure back of the wind wheel changes the direction of the positive pressure gas at front of the wind wheel and it is accelerated and discharged along the curve degree of the vane. This continuous movement, the natural wind speed can be accelerated about 1.7-.32 times, realizes the utilization of low speed segment with speed of 1.4m/s-5.5m/s. If they are assembled on the 'high speed protection frame', it can save energy and generate electricity normally with speed under 50m/s, it sets no machine-stop speed. The experience testifies that the whole generated power is 1.7-2 times of the one with normal wind wheel.

Description

Negative pressure wind wheel

Technical field

Negative pressure wind wheel is to absorb low wind speed, because wind wheel structure is made the hurricane of not being afraid of flying dirt with iron and steel, row is contained on " high speed fender bracket ", can be under 1.4-50m/s, and the energy storage power generation of safety, good more in the world wind district also is that the much wind of gentle breeze is few.So a class, two classes, three class wind districts, all with 10% the small wind of 0.1m/s, little fresh breeze of 60% dacron 1.4m/s-5.5m/s, strong wind among 20% the 6m/s-19m/s, other has 10% 20m/s-35m/s storm wind, and the hurricane of 40m/s-50m/s is not seen once in a hundred years in general wind district.The wind wheel of modern medium-and-large-sized wind energy conversion system can only be worked in the wind speed section district of 5m/s-21m/s.In the wind speed section of 3-4m/s starting 5-6m/s generating 21m/s, work.21m/s shuts down in 3/4m/s starting 5-6m/s generating.The diameter of this type Negative pressure wind wheel, Φ 5m-Φ 14m by minimum is square wheel face, and Φ 26-30m is circular blade face, uses this Negative pressure wind wheel, the negative maximum electric motor power of formula structure on Dan Fengta is the unit group of 10MW (10,000 kilowatts), so patent of the present invention is advanced frontier.

Technical background

Patent of the present invention is still to have under four unsolved backgrounds of technical barrier at the wind wheel that has wind energy conversion system now, first technical barrier that works out is: the big capacity unit that obtain single wind tower is appointed surely and is, have only the blade elongation, strengthen rotor diameter, satisfy and strengthen electric motor power.If when being increased to electric motor power and being 4MW, rotor diameter is Φ 230m, at this moment wind energy utilization K, less than 0.17, and the weight of the large diameter like this wind wheel material of manufacturing is to be difficult to solve, because the edge joint of blade and wheel hub---leaf root part, singly do not bear weight, also will bear huge lever.Second technical barrier is: wind energy utilization is low excessively, and during as 10m/s, it is 240m that the wind wheel revolutions per minute have only 8 distances of changeing (during Φ 230) blade tip, and the regulation by medium-and-large-sized wind turbine impeller linear speed is 5000m/nim (per minute 5000m).Then need to cover for 2.4 seconds blade to distance, 80% not work done of wind and rush down.So can't obtain desirable wind energy utilization K.Through the three technology difficulty be; There is not the utilization of rational wind speed section, as the wind wheel of little medium-and-large-sized wind energy conversion system.The three technology difficulty is: do not have the utilization of rational wind speed section, as the wind wheel of little medium-and-large-sized wind energy conversion system, the wind speed section of being utilized is 5-6m/s-20-25m/s, has the load of the speedup box etc. of generator and high number ratio because of wind wheel.As wind speed during, when the side-thrust on wind wheel blade face is not enough, wind wheel is fail to start less than 5m/s.Again because behind the super 20m of wind speed, be make and break low speed resonance region.Closely shut down, make blower fan along with the impacting of flying dirt, the destruction of the gravity accleration of swinging frequently with wind, this can only have the breakage of wind wheel in various degree.And do not protect the safety of full unit.So the wind speed section of the Negative pressure wind wheel of patent of the present invention be by l.4m/s to the safe operation between 50m/s, (for uprising wind, hurricane with wind wheel arrange assembling structure go up at " high speed fender bracket " realize).Now to utilize the wind speed section be to pinch a public attention to remove the wind tail to wind wheel, has only 50% middle wind speed to be utilized.The 4th technical barrier is: the selection of material unreasonable, as using medium-and-large-sized wind energy conversion system, the wind wheel leaf blade of MW level nearly 40 is long, makes 1 super l0T of blade with high-intensity iron and steel.Wind wheel blade as 2-3MW surpasses hundred T, and the intensity of blade root, existing metal can't be realized, now has only the employing composite, because light specific gravity is used to the big wind of irresistible this tool of the so inadequately wind wheel of momentum frequently, send high-quality electric energy, the essential control program that increases so not only changes part to maintenance and brings unfavorablely, also increases manufacture cost simultaneously.The design of the diameter of this Negative pressure wind wheel is to carry out in the scope that the mechanics of materials allows, and this has not only solved material velocity, has reduced trouble to control frequency again.

The solution of first technical barrier is: as expecting desirable electric motor power, need make numerous wind wheel structures on independent pylon, be contained in Feng Tashang as the square wind wheel row of 14m, can obtain 10,000 kilowatts wind-powered electricity generation unit.The solution of second technical barrier is: vertically-supplying air to 360 ℃ of wind sweeping areas in, come veer with hundred-percent, the opening with the afterbody of blade from the blade gushes to nothing.

Summary of the invention

A kind of iron and steel of all using, and, connect two semilunes or two rectangular blades with cone with the wind wheel that advanced person's technology is made, be covered with on the disc of interior 360 ℃ of wind sweeping area.Make before its leaf with behind the leaf and produce pressure reduction, because of the streaming of wind wheel periphery, join behind the down wind again, and form " the air port generation " of a tapered tube shape, another part turbulent flow is also pulled to the rear by " air port generation ", therefore produces the negative pressuren zone doubly than the big 2-3 of blast before the wheel.And the draft speed that produces because of negative pressure, than the high 1.7-3.2 of natural wind speed doubly, draft big be to decide for a short time by wind speed.And thus title: " Negative pressure wind wheel ".

For make wind wheel produce tool big be used to momentum, and higher intensity is arranged, the structure of wind wheel all adopts the iron and steel manufacturing.Again because of the wind comes from of wind wheel middle part is concentrated on the blade.Wheel hub is made cone, the area of taking root of blade is also strengthened thereupon, can have well with the torque of different wind wheels in order to make rotor shaft, the other end of wheel shaft is through wheel hub.The structure of " Negative pressure wind wheel ": be by wind axis 1, run through wheel hub 2, blade 3, take root, be linked to be that first quarter moon forms or rectangular at wheel hub 2, by spoke muscle 4, supporting and by ring muscle 5, wind wheel frame and steel plate 6, the square of assisting into square, length of side 8m square, length of side 10m square and the length of side 14m of square, length of side 6m that positive circle and " Negative pressure wind wheel " specification of positive dominant shape have Φ 2m Φ 3m Φ 4m length of side 4m, the square of length of side 18m, maximum can reach pros' " Negative pressure wind wheel " of the 20m length of side.

Description of drawings

Figure one is a plan view, and figure two is a side view, and figure three is the comparison diagram of the performance curve of Negative pressure wind wheel and common three paddle wind wheels.

Figure one is the plan view of patent of the present invention, mark among the figure: 1, rotor shaft, 2, wheel hub, 3, blade, 4, the spoke muscle, 5, the ring muscle, 6, steel plate, 7, blade lacing, 8, the wheel nave collar, 9, propeller boss connects dish.

Embodiment

By the blade 3 that absorbs wind energy, take root on wheel hub 2, indeformable for blade operation balance, add spoke muscle 4, with ring muscle 5, the structure wheel hub frame that becomes a common practice.Decide auxilliary again being contained on the wind wheel hub frame of thickness of steel plate 6 according to the size of rotor diameter.For solid between wind resistance frequency, blade with drawing dish 7 to draw.With wheel nave collar 8 and wheel hub upper end with whole kinetic energy that wind wheel absorbed, by wheel shaft 1, pass to generator or energy accumulating machine and be converted to electric energy and use.

Claims (2)

1, a kind of Negative pressure wind wheel is characterized in that: first protection of patent of the present invention " Negative pressure wind wheel ", and φ 2m is above to be double-leaf, and every sector is 180 °, and φ 10m is above to be quaterfoil, and each sector is 90 °.The operation characteristic of wind wheel is: perpendicular to the air-flow on the wind wheel face, can not directly pass by.And need all to change directions, and gush behind wheel along the curvature of blade, therefore producing side-thrust becomes kinetic energy.

2, according to claim 1, Negative pressure wind wheel is characterized in that: all adopt iron and steel to make in order to satisfy the certain high strength demand " Negative pressure wind wheel " of being used to momentum and anti-hurricane of generation.