CN201386619Y

CN201386619Y - Blade of wind generating set

Info

Publication number: CN201386619Y
Application number: CN200920147506U
Authority: CN
Inventors: 张富全; 赵智刚
Original assignee: INNER MONGOLIA HUIQUAN ENVIRONMENTAL-PROTECTING POWER Co Ltd
Current assignee: INNER MONGOLIA HUIQUAN ENVIRONMENTAL-PROTECTING POWER Co Ltd
Priority date: 2009-03-26
Filing date: 2009-03-26
Publication date: 2010-01-20
Anticipated expiration: 2019-03-26

Abstract

The utility model relates to a wind generating set, in particular to a blade of the wind generating set, which belongs to the field of wind power generation, and is characterized in that a wing shaped plate is arranged on the blade of the utility model, and the blade and the wing shaped plate are connected movably. The movable wing shaped plate is embedded on the blade, therefore the rotating torque of the blade can be adjusted through rotation of the wing shaped plate on the blade, thereby realizing the functions of generating set efficiency adjustment and safe protection. The utility model has the advantages of strong wind energy catching ability, wide working wind speed range, excellent safety, stable rotating speed, stable output and long service life.

Description

Wind generator set blade

One, technical field

The utility model relates to a kind of wind power generating set, particularly wind generator set blade, belongs to wind power generation field.

Two, background technique

At present, following two kinds of methods are mainly taked in China's grid type wind generator set blade power adjustments and safety protection:

1, fixed pitch stall-adjusted type wind power generating set

Fixed pitch is meant to be fixed blade and being connected of wheel hub, and promptly when wind speed changed, the angle of facining the wind of blade can not change thereupon.Stall is meant the stalling characteristics that blade itself is had, and when wind speed is higher than rated wind speed, air-flow will produce eddy current on the surface of blade, and pneumatic efficiency is reduced, and produce stall, limit the power output of generator.The damping plate of the blade tip by opening blade during when unit hypervelocity or to cut-out wind speed plays the safety shut-down effect, protects unit safety.Advantage is simple and reliable for structure, but owing to decide the oar stall-adjusted is to be finished by blade itself, the variation that changes the output power that causes when wind speed can only be by the passive stall-adjusted of blade, and unit control system can't be done any control, make power control stable inadequately like this, the variable power scope is big.Under the situation that wind speed changes, wind power generating set has only very little chance to move in the best condition, so the whole efficiency of unit is lower.Usually only be applied on the wind power generating set of hectowatt grade.

2, feather adjustment type wind power generating set

Become slurry and be meant that apart from the wind-force unit whole blade can rotate around the blade central shaft, the whole blade angle that facings the wind is changed, in certain limit (0 °--90 °) so that adjusting power does not exceed the design permitted value.In running, when output power during less than rated power, propeller pitch angle keeps the origin-location constant, does not do any adjusting; After generated output power reached rated power, regulating system made the output power of generator remain on rated power according to the size at the variation adjustment blade pitch angle of output power.Advantage is that power output is stable, is can quick shutdown when the slurry elongation reaches 90 °, the protection unit safety.But because variable slurry is assembled with the change slurry bearing that can make blade rotation apart from machine, driving mechanism, reducing gear, control system etc., so cause becoming slurry apart from the system architecture more complicated, the cost height is out of order easily and waits deficiency.

Three, summary of the invention

The utility model is for solving the deficiency of above wind power generating set, a kind of wind generator set blade that can regulate wind wheel power and safety shut-down being provided.

Technical solution: the utility model blade is provided with wing-shaped plate, and blade and wing-shaped plate flexibly connect.

Wing-shaped plate outer surface and blade outer surface are at grade.

The shape of wing-shaped plate is identical with the shape of blade installation surface of position.

Wing-shaped plate can rotate in 0 ° of-90 ° of angular range.

Wing-shaped plate is located at blade windward side or lee face.

Wing-shaped plate is located at the blade mid point between the blade tip.

The utility model combines two kinds of wind power generating set technology of fixed pitch stall-adjusted type and feather adjustment type owing to embed a rotary wing-shaped plate on blade, has fully drawn the advantage of passive stall and pitched.Blade adopts the installation method of Stall Type blade, directly links to each other with wheel hub, and simple in structure do not have complicated change to starch system.Controlling device adopts and embeds a rotating wing-shaped plate on the blade, by the torque that the wing-shaped plate on the rotor blade comes adjusting vane, reaches and regulates the power of the assembling unit and safety protection function.At low wind speed elbow, blade airfoil plate angle of swing is 0 ° and blade surface applying, and blade keeps original aerodynamic characteristic unit normal power generation.After power that wind energy conversion system sends surpassed rated power, the wing-shaped plate that is installed on the blade began to open.Rotation has produced certain resistance to blade because wing-shaped plate is opened the back, cause blade that the rotary driving force square that unit produces is descended, and the angle of opening along with the different adjustment wing-shaped plate of wind speed size is also different, also different to the resistance of blade generation simultaneously, the power of the assembling unit is stabilized on the rating value, has optimized the output of the power of the assembling unit.

The utility model blade is a main body, is used for producing the driving moment of wind wheel.The blade airfoil plate is to be embedded in the blade, has identical wing shape with the blade installation surface of position, a rotary device.When wing-shaped plate did not have rotation and blade surface to fit, blade kept original wing shape.When the wind wheel hypervelocity, after perhaps unit exceeded rated power, the wing-shaped plate that embeds blade, left blade surface and begins to rotate under the driving of motor or hydraulic pressure installation by transmission device.The angle difference of rotating, the resisting moment that blade is produced is also different, and the angle that turns over is bigger, and is also bigger to the resistance of blade, plays the purpose of regulating wind power generating set power and safety protection.Transmission device comprises rotating shaft, bearing, gear, connecting rod etc.Drive unit has dual mode, and a kind of is motorized motions or the oil hydraulic motor that has retarder, and another kind is to pass through Driven by Hydraulic Cylinder.Simultaneously, the control system that is installed in power, rotating speed, wind velocity signal and the unit of angle on wing-shaped plate and the transmission device and displacement transducer and unit forms closed loop control, guarantees unit stable output power and safety shut-down.Have that the wind energy capture ability is strong, wide work wind speed range, plurality of advantages such as Security is good, rotating speed is steady, output is stable, long service life.

Four, description of drawings

Fig. 1 is that the utility model wing-shaped plate is at the initial position structural representation;

Fig. 2 is the utility model wing-shaped plate open mode structural representation;

Fig. 3 is the structural representation of the utility model wing-shaped plate under full open position;

Fig. 4 is the utility model Driven by Hydraulic Cylinder structural representation;

Fig. 5 is the utility model with motor or fluid motor-driven structural representation.

Five, embodiment

Below in conjunction with accompanying drawing embodiment of the present utility model is elaborated:

Embodiment 1

With reference to Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, have wing cavity on the windward side of the utility model blade 1 or the lee face, cavity bottom is installed with bearing support 5, the wing-shaped plate 2 that matches with wing cavity is installed in the rotating shaft 6 by bearing support 5, wing-shaped plate 2 can 6 rotate around the shaft, the shape of wing-shaped plate 2 is identical with the shape on surface, blade 1 mounting point, the outer surface of the outer surface of wing-shaped plate 2 and blade 1 at grade, wing-shaped plate 2 is connected with driving mechanism by driving mechanism, driving mechanism and driving mechanism are installed on blade 1 inside, and be as a whole with 1 one-tenth in blade.Driving mechanism has dual mode, and a kind of is motorized motions or the oil hydraulic motor that has retarder, and another kind is a Driven by Hydraulic Cylinder.When driving 8 drivings of employing oil hydraulic cylinder, oil hydraulic cylinder 8 one ends are fixed on blade 1 inwall, and the other end is connected with rotating shaft 6 by the connecting rod on the driving mechanism 7, and oil hydraulic cylinder 8 promotes connecting rods 7 and rotates, and connecting rod 7 drives rotating shaft 6, and rotating shaft 6 rotation drive wing-shaped plates 2 rotate.In the rotating shaft 6 of driving mechanism angle transducer is housed, perhaps on the piston rod of hydraulic jack, displacement transducer is housed.The control system of the power of angle or displacement transducer and unit, rotating speed, wind velocity signal and unit forms closed loop control.The power of unit, rotating speed, wind velocity signal and control system adopt the technology and equipment of existing wind power generating set.

The utility model drives when adopting motorized motions or fluid motor-driven, the motor or the oil hydraulic motor 3 that have speed reducer drive rotating shaft 6 rotations by the gear on the driving mechanism 4, rotating shaft 6 drives wing-shaped plate 2 rotations again, in the rotating shaft 6 of driving mechanism angle transducer is housed, the control system of the power of angle transducer and unit, rotating speed, wind velocity signal and unit forms closed loop control.

The utility model when unit operation when the rated power of unit is following, wing-shaped plate 2 keeps original state, blade 1 keeps original wing shape and aerodynamic characteristic, this moment, wing-shaped plate 2 was fitted with blade 1 surface, without any influence, unit keeps original power characteristic operation to the operation of blade 1 and aerodynamic characteristic.

When the wind wheel hypervelocity, after perhaps unit exceeds rated power, the wing-shaped plate 2 that embeds blade 1 promotes connecting rod 7 by oil hydraulic cylinder 8 and rotates, connecting rod 7 drives rotating shaft 6, and rotating shaft 6 is rotated and driven wing-shaped plate 2 rotations, and wing-shaped plate 2 begins to open, and according to wind speed round, wind speed, the difference of power, the angle that wing-shaped plate 2 is opened are also different.Because the angle difference opened of wing-shaped plate 2 is just different to the resistance that blade 1 produces, the resisting moment that blade 1 is produced is also different, and the angle that turns over is bigger, also bigger to the resistance of blade 1, has guaranteed that wind wheel is exceeding the constant of output power under the environment of rated wind speed.When unit operation was under rated power, wing-shaped plate 2 drew in automatically, guaranteed that blade 1 is operated under the maximal wind-energy capture state.

When wind speed is higher than the unit cut-out wind speed, perhaps unit breaks down in the time of need stopping in emergency, and the wing-shaped plate 2 on the blade 1 is opened (wing-shaped plate 2 is along the rotating shaft half-twist) fully, and unit enters braking state, guarantees that unit reliably shuts down.Wing-shaped plate 2 plays the aerodynamic brake effect under strong wind and unit fault, guarantee the unit safety shutdown.

Claims

1, wind generator set blade is characterized in that: blade (1) is provided with wing-shaped plate (2), and blade (1) flexibly connects with wing-shaped plate (2).

2, wind generator set blade according to claim 1 is characterized in that: wing-shaped plate (2) outer surface and blade (1) outer surface are at grade.

3, wind generator set blade according to claim 1 and 2 is characterized in that: wing-shaped plate (2) can rotate in 0 ° of-90 ° of angular range.

4, wind generator set blade according to claim 3 is characterized in that: the shape of wing-shaped plate (2) is identical with the shape on blade (1) surface, mounting point.

5, wind generator set blade according to claim 4 is characterized in that: wing-shaped plate (2) is located at blade (1) windward side or lee face.

6, wind generator set blade according to claim 5 is characterized in that: wing-shaped plate (2) is located at blade (1) mid point between the blade tip.