CN118167546A - Wind power generation blade lift force adjusting device - Google Patents
Wind power generation blade lift force adjusting device Download PDFInfo
- Publication number
- CN118167546A CN118167546A CN202410017969.3A CN202410017969A CN118167546A CN 118167546 A CN118167546 A CN 118167546A CN 202410017969 A CN202410017969 A CN 202410017969A CN 118167546 A CN118167546 A CN 118167546A
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- China
- Prior art keywords
- blade
- blade piece
- wind
- rotatory dryer
- air
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/022—Adjusting aerodynamic properties of the blades
- F03D7/0236—Adjusting aerodynamic properties of the blades by changing the active surface of the wind engaging parts, e.g. reefing or furling
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Wind Motors (AREA)
Abstract
The invention discloses a wind power generation blade lift force adjusting device which comprises an impeller hub shell and blade pieces, wherein the blade pieces are annularly arranged on the outer wall of the peripheral side of the impeller hub shell, a rotary air drum is connected in an embedded rotating mode in each blade piece, a motor used for driving the rotary air drum to rotate is arranged behind each rotary air drum and in each blade piece, and when the rotating speed and the rotating direction of the rotary air drum are adjusted, the power difference of two sides of each blade piece can be changed. The wind generating set can be used and regulated under different wind speeds, so that the efficiency and the running time of wind power generation are improved.
Description
Technical Field
The invention belongs to the technical field of wind power generation, and particularly relates to a lift force adjusting device of a wind power generation blade.
Background
The principle of wind power generation is that wind power is utilized to drive windmill blades to rotate, and then the speed of the rotation of the blades is increased through a gearbox, so as to drive a generator set to generate power. According to the existing wind power generation technology, the generation of electricity can be started at a breeze speed (the degree of breeze) of about three meters per second. Wind power generation is forming a hot tide in the world because the wind power generation does not need to use fuel and does not generate radiation or air pollution.
At present, a conventional wind generating set is limited by the type and the windward angle of blades, when the wind speed is lower than 3m/s, the pressure difference generated at the two sides of the blades is small, the wind generating set is not sufficiently driven to rotate, when the wind speed is higher than 25m/s, the pressure difference generated at the two sides of the blades is large, the linear speed at the top end of an impeller is high, in order to avoid damage to the blades, a locking device is generally arranged to withdraw the wind generating set from operation, and the operation time of the wind generating set is limited. The wind generating set is limited by the type of the blade and the angle of the blade, and when the wind speed is lower than a certain value, the wind generating set is automatically stopped, and the wind speed is cut-in wind speed; the cut-off wind speed is the maximum wind speed of the grid-connected operation of the wind generating set, the wind generating set cuts off the power grid beyond the maximum wind speed, the wind power generation is stopped, and if the cut-off wind speed is reached, the risk of tower collapse, impeller galloping and the like can be caused.
The wind power generator converts wind energy into kinetic energy of blade rotation by utilizing aerodynamic force from rotor blades, so that the generator is driven to rotate for power generation, the rotor blades work in a manner similar to that of an airplane wing or a helicopter rotor blade, meanwhile, when the wind power generator is installed, cutting-in blocking and cutting-off customs of the wind power generator are arranged according to the length of the blades, and the lift range of the blades cannot be adjusted according to the change of wind speed, so that wind speed resources cannot be well utilized in wind power generation, and the running time of a wind generating set is reduced.
Disclosure of Invention
The invention aims to provide a lifting force adjusting device of a wind power generation blade, which aims to solve the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a wind power generation blade lift adjusting device, includes impeller hub shell and annular array installs the blade spare at impeller hub shell week side outer wall, every the inside of blade spare is all embedded to rotate and is connected with rotatory dryer, every the back of rotatory dryer just is located the blade spare and all has the motor that is used for driving rotatory dryer rotatory, adjusts when the rotational speed of rotatory dryer and the direction of turning, can change the power difference of blade spare both sides.
The invention has the technical effects and advantages that: 1. the cutting-in speed of the wind generating set can be reduced, the cutting-out speed of the wind generating set can be increased, and the running time of the wind generating set can be prolonged;
2. The lift force of the blade can be adjusted according to the change of wind speed, and the adaptability is improved.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic diagram showing the counterclockwise rotation of the rotary air duct of the present invention;
FIG. 3 is a schematic view of the clockwise rotation of the rotary air duct of the present invention.
In the figure: 1. an impeller hub housing; 2. a blade member; 3. a support column; 4. and (5) rotating the air duct.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
The invention provides a wind power generation blade lift force regulating device shown in figures 1-3, when the wind speed is lower than a certain value, a wind generating set is automatically stopped, and the wind speed is cut-in wind speed; the cut-off wind speed is the maximum wind speed of the grid-connected operation of the wind generating set, the wind generating set cuts off the power grid beyond the maximum wind speed, the wind power generation is stopped, and if the cut-off wind speed is not cut off, the risks of tower collapse, impeller galloping and the like can be caused; in order to improve and reduce the cut-in rotating speed and improve the cut-out rotating speed of the wind turbine, further improve the running time of the wind turbine and improve the reliability, a rotary air duct 4 is arranged on the wind turbine blade piece 2, the power difference at two sides of the wind turbine blade piece 2 can be changed by adjusting the rotating speed and the rotating direction of the rotary air duct 4 through a motor, and the running time of the wind turbine is further improved.
The device comprises an impeller hub shell 1, a support column 3 arranged on the bottom surface of the impeller hub shell 1 and a ring-shaped array of blade pieces 2 arranged on the outer wall of the periphery side of the impeller hub shell 1, wherein when the wind speed in the air is greater than the cutting-in speed of a wind turbine generator, the blade pieces 2 drive the wind turbine generator to rotate, so that electric energy is generated.
The blade element 2 is an important part for converting the kinetic energy of wind into mechanical energy and consists of several blades. The shape of the blade is similar to that of an aeroplane, when wind blows to the blade, as the flow velocity of air above and below the blade is different, according to a Bernoulli equation, pressure difference is generated at two sides of the blade, and the blade drives the wind wheel to rotate; because the blade type of the fan is fixed, the cut-in speed and the cut-out speed of the wind generating set are basically consistent, and cannot be adjusted according to the wind speed condition, so that the running time is shortened;
Every the inside of blade piece 2 is embedded to rotate and is connected with rotatory dryer 4, every rotatory dryer 4's axial tip just is located the blade piece 2 and all has the motor that is used for driving rotatory dryer 4 rotation, and the motor can drive rotatory dryer 4 clockwise rotation or anticlockwise rotation, when adjusting rotatory dryer 4's rotational speed and direction, can change the power difference of blade piece 2 both sides, when the velocity of flow is less than when cutting into the rotational speed in the air, carries out anticlockwise rotation with rotatory dryer 4, and the air that flows through blade piece 2 upper portion is further accelerated after passing through rotatory dryer 4 this moment, and the air velocity of flow that flows through blade piece 2 lower part is under the effect of rotatory dryer 4, and the velocity of flow is fast according to the Bo's equation, and pressure is little, and the air velocity of flow of blade lower part is slow, and pressure is big to drive impeller begins to rotate, as shown in fig. 2.
Working principle:
When the air flow rate exceeds the cut-out rotating speed of the fan, the rotating air drum 4 is adjusted to rotate clockwise, and at the moment, after the air flowing through the upper part of the blade piece 2 is decelerated by the rotating air drum 4, the air flow rate at the upper part of the blade piece 2 is reduced, and the pressure is reduced; after the air flow rate at the lower part of the blade piece 2 is accelerated by the rotary air duct 4, the air flow rate at the lower part of the blade piece 2 is increased, and the pressure is increased; the fan assembly can be kept running without damage to the equipment after the speed exceeds the allowable speed, as shown in fig. 3.
Similarly, the lift adjustment system can be applied to various equipment places suitable for generating lift due to wind speed change, such as an aircraft wing.
The foregoing is only a preferred embodiment of the invention, but the scope of the invention is not limited thereto, and any person skilled in the art who is in the field of the invention can apply equivalent substitution or modification to the technical solution and the inventive concept according to the invention within the scope of the invention.
Claims (1)
1. The utility model provides a wind power generation blade lift force adjusting device, includes impeller hub shell (1) and installs blade piece (2) at impeller hub shell (1) week side outer wall, its characterized in that: every the inside of blade piece (2) is all embedded rotates and is connected with rotatory dryer (4), every rotatory dryer (4) all have in blade piece (2) and are used for driving rotatory dryer (4) pivoted motor, adjustment rotatory dryer (4) rotational speed and direction are used for changing the power difference of blade piece (2) both sides, when the velocity of flow is less than cut in the rotational speed in the air, carries out anticlockwise rotation with rotatory dryer (4), and the air that flows through blade piece (2) upper portion after this moment further accelerates through rotatory dryer (4), and the air flow rate of air that flows through blade piece (2) lower part falls under the effect of rotatory dryer (4), and when the air flow rate exceeded the cut-out rotational speed of fan, through adjusting rotatory dryer (4) clockwise rotation, the air flow rate of air that flows through blade piece (2) upper portion after the deceleration of rotatory dryer (4) this moment falls, and the air flow rate of blade piece (2) lower part after accelerating through rotatory dryer (4), the pressure decline, and the air flow rate of blade piece (2) lower part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410017969.3A CN118167546A (en) | 2024-01-05 | 2024-01-05 | Wind power generation blade lift force adjusting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410017969.3A CN118167546A (en) | 2024-01-05 | 2024-01-05 | Wind power generation blade lift force adjusting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118167546A true CN118167546A (en) | 2024-06-11 |
Family
ID=91355231
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410017969.3A Pending CN118167546A (en) | 2024-01-05 | 2024-01-05 | Wind power generation blade lift force adjusting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118167546A (en) |
-
2024
- 2024-01-05 CN CN202410017969.3A patent/CN118167546A/en active Pending
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