Wind power generation device with folding wing type fan blades and preparation method of wind power generation device

Abstract

The invention relates to a wind power generation device with folding wing type fan blades and a preparation method of the wind power generation device. The fan blades of the device are movable wings. The windward area of the fan blades can be increased, more breeze can be captured, and the power generation duration is prolonged; when the windward wind power of the fan blades reaches a certain value, the fan blades connected with the fan blade movable connecting mechanism are bent and deformed under the action of the folding wing drivers, the fan blades can move in the wind direction from the roots of the fan blades, and the impact of strong wind on the fan blades is reduced. The bending degree and the bending degree of the fan blades can be determined according to wind pressure and can be adjusted, so that the fan blades are in a safe state; therefore, due to the change of the wingspan amplitude of the fan blade adjusted along with the wind force, the generator can realize the aging work of a long wind section, more power generation benefits are generated, and the service life of the fan is greatly prolonged.

Description

Technical Field

[0001] The present invention relates to a wind power generation device capable of adjusting the windward angle of blades at any time according to changes in wind strength, and in particular to a wind power generation device with folding-wing blades and a preparation method thereof. Background Art

[0002] Converting the energy given to humans by nature, such as solar energy, wind energy, magnetic energy, etc., into functional energy for modern life and production is an inevitable practical process from discovery to invention to practice. For example, how to use windmills to convert the kinetic energy of wind into electrical energy, and then use electrical energy as driving energy to enable the subsequent driven body to release purposeful functions.

[0003] For example, Chinese patent document CN210686199U discloses a horizontal axis double roller self-seeking wind power generation device, which includes a tower body and a generator. The outer sleeve of the central axis is rotatably arranged on the top of the tower body through a sleeve bearing. The flywheel energy storage disk is connected to the generator. Cross-shaped wind wheels, i.e., rollers, are symmetrically arranged on both sides of the generator. The wind wheels are connected to the angle gears. The side of the wind wheel is the windward side. The windward side of the wind wheel is a wind bucket support rod for wind flow to pass through. A wind bucket is arranged inside the wind bucket support rod along the body length of the wind wheel support. The purpose of the invention is to improve the utilization rate of wind energy.

[0004] For another example, Chinese patent document CN102979668A discloses a window-type wind turbine rotor, the prominent technical focus of which is to set a number of blades in the hollow frame of the hub, and one edge of the blade is connected to the blade shaft and inserted into the wind rotor, i.e., the roller, through the blade shaft. This design is to make the blade automatically close the opening in the downwind position and automatically open the opening in the upwind position, that is, both are used to improve the utilization rate of wind energy.

[0005] For another example, Chinese patent document CN113217273A discloses a wind turbine rotor rotating device and a wind turbine generator equipped with the rotating device. Its technical solution emphasizes that in the fan blade frame, one side of the blade is connected to two wind wheel shafts, which are inserted into the wind wheel, i.e., the roller, through the two wind wheel shafts, and a torsion spring is sleeved on the two wind wheel shafts, so that the blades are unfolded in the downwind direction, and the long blades are used to move along the wind. In the upwind direction, the wind wheel is perpendicular to the upwind, and the blades are not used to move against the wind. The hollow shaft of the wind wheel is connected to the input shaft of the generator. That is, they are all used to improve the utilization rate of wind energy.

[0006] For example, Chinese patent application No. 202110941313.7 discloses a horizontal axis double roller self-regulating and self-wind-seeking wind power generation device, including a tower and a generator. The generator is rotatably arranged at the top of the tower through a slewing bearing. Cross-shaped rollers are symmetrically arranged on both sides of the generator. The rollers are connected to the power input shaft of the generator. A fishtail-shaped triangular tail rudder is extended to the rear of the roller on the generator housing. The side of the roller is the windward surface, and the windward surface of the roller is a hollow frame for the wind flow to pass through. A number of blades are arranged along the length of the roller bracket in the hollow frame. One edge of the blade is connected to the blade shaft, and is inserted into the roller through the blade shaft, and a torsion spring is sleeved on the blade shaft. This technical solution highlights the functions of torque enhancement, automatic speed adjustment and wind-seeking of the device body, and improves the ability of the device body to resist strong winds while maintaining a constant blade speed.

[0007] The above publicly reported technical solutions are subject to different opinions. Overall, they are all aimed at improving power generation efficiency. Summary of the invention

[0008] The technical problem to be solved by the present invention is to provide a wind power generation device with folding-wing blades and a preparation method. The device prepared by the method can overcome the problem of the horizontal axis wind turbine blades in the prior art that the longer the length of the blades, the lower the wind resistance. Especially when the wind intensity is greater than the wind resistance limit value designed for the wind turbine and the wind turbine is facing damage, the present device can still enable the wind turbine to operate safely and normally and evenly improve the power generation efficiency.

[0009] To this end, the technical solution of the present invention to solve the problem is: a wind power generation device with a folding-wing fan blade, comprising a fan blade generator main shaft, a generator unit, a fan blade, a flange, a folding-wing drive, a tower, a flange and a fan blade movable connection mechanism; wherein the tower is connected to the generator unit, and the generator main shaft and the flange arranged in the generator unit are coaxial, wherein one end of the flange is connected to the folding-wing drive, one end of the folding-wing drive is connected to the fan blade movable connection mechanism, and the fan blade movable connection mechanism connects the fan blade; and the fan blade is a bendable movable wing, and the fan blade's wingspan is bent and deformed by the fan blade movable connection mechanism connected by the folding-wing drive.

[0010] Preferably, the folding-wing driver is an electromagnetic valve-controlled driver with a wind sensor, and the wind sensor senses the force of wind on the fan blades and drives the bending stroke of the fan blade movable connection mechanism.

[0011] Preferably, the folding-wing driver is a hydraulic driver with a pressure sensor. When the pressure sensor senses the strength of the wind applied to the fan blade, the hydraulic driver drives the fan blade movable connection mechanism to perform a bending stroke in the counterwind direction.

[0012] Preferably, the folding-wing driver is a connecting rod driver with a push-pull spring. When the wind force on the fan blade increases and the angle between the blade surface and the orthogonal wind receiving angle is greater than 90°, the connecting rod driver drives the fan blade to receive the wind in the reverse direction.

[0013] A method for preparing a wind power generation device with folding-wing fan blades comprises the following steps: building a foundation tower setting position, installing the tower, using a crane to hoist a generator unit with a generator on the top of the tower step by step, installing a flange at one end of a main shaft extending from the generator unit, wherein a folding-wing drive is connected to one end of the flange, a fan blade movable connection mechanism is connected to the other end of the folding-wing drive, a fan blade is connected to one end of the fan blade movable connection mechanism, and the fan blade is connected to one end of the fan blade so that the working direction of the fan blade faces the generator unit side.

[0014] Preferably, the generator unit hoisted by the crane, the flange installed at one end of the main shaft extending from the generator unit, and the folding wing drive connected to one end of the flange are all completed step by step at the construction site, and then the crane is started to connect the fan blade movable connection mechanism at the other end of the folding wing drive.

[0015] Compared with the prior art, the fan blade of this device is a movable wing. The windward area of ​​the fan blade can be increased, and more breezes can be captured to increase the duration of power generation. When the wind force facing the fan blade reaches a certain value, the fan blade connected to the fan blade movable connection mechanism is bent and deformed under the action of the folding wing driver, and the fan blade can move along the wind direction from its root to reduce the impact of strong wind on the fan blade. The bending and folding degree of the fan blade can be determined according to the wind pressure and can be adjusted to keep the fan blade in a safe state. The change in the span of the fan blade adjusted according to the wind strength can enable the generator to achieve long wind section time-effective operation, generate more power generation benefits, and greatly improve the service life of the fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a horizontal axis wind power generation device in the prior art.

[0017] Figure 2 It is a schematic structural diagram of a wind power generation device with folding-wing blades according to the present invention.

[0018] In the figure: 1-main shaft of wind blade generator, 2-generator unit, 3-wind blade, 4-flange, 5-folding wing drive, 6-tower, 7-movable connection mechanism of wind blade, 8-deformed wind blade (in the form of dotted triangle), 9-wind vane direction. DETAILED DESCRIPTION

[0019] As a wind power generation device in the prior art, a wind turbine generator unit is installed on the tower, which can be divided into three parts. The first is the fan blades for obtaining kinetic energy and the connection parts with the generator transmission main shaft and the structural part of each fan blade that can adjust the wind receiving angle of the fan blade according to needs; the second is the speed increase gearbox and / or direct-drive wind turbine generator speed change part to solve the incompatibility between wind speed and generator working conditions; the third is the generator part for energy output.

[0020] Figure 1 The basic structure of the horizontal axis wind power generation device of the prior art is shown. Its working condition is that the flange coaxial with the wind turbine unit is fixedly connected to the wind blade. No matter how the wind force on the wind blade changes, the main body of the wind blade will not tilt toward the axis.

[0021] In contrast, Figure 2 The structure of the wind turbine generator with folding blades of the present invention is accurately disclosed. The following embodiments will describe in detail the substantial differences between the two structures. First, as the same part, the prior art Figure 1 、 Figure 2 All of them adopt the structural design of the fan blade generator main shaft 1, the generator unit 2 and the tower 6; and the outstanding substantial contribution of this embodiment is that a wind power generation device with a folding-wing fan blade has a fan blade generator main shaft 1, a generator unit 2, a fan blade 3, a flange 4, a folding-wing driver 5, a tower 6, and a flange and a fan blade movable connection mechanism 7; wherein the tower 6 is vertically connected to the generator unit 2, and the generator main shaft 1 arranged in the generator unit 2 is coaxial with the flange 4, wherein one end of the flange 4 is connected to the folding-wing driver 5, and one end of the folding-wing driver 5 is connected to the fan blade movable connection mechanism 7, and the fan blade movable connection mechanism 7 is connected to the fan blade 3; and the working direction of the fan blade is facing the generator unit side. wherein the fan blade 3 is a bendable movable wing, and the fan blade movable connection mechanism 7 connected by the folding-wing driver 5 makes the wingspan of the fan blade 3 bend and deform. The above technical solution description clearly shows that the structure, function, position and connection relationship between the flange 4, the wing-folding drive 5, the blade movable connection mechanism 7 and the blade 3 in this embodiment have outstanding substantive features and significant technical progress. Figure 2As shown, the dynamic wind blade 3 can change the windward angle of its blade surface with the size of the wind force, and this change depends on the driving force and method of the folding wing driver 5 on the wind blade movable connection mechanism 7. In practice, the wind blade 3 can be likened to a leaf, the generator unit 2 and the tower 6 in the device are similar to the trunk, and the flange and the wind blade movable connection mechanism 7 are similar to the petiole. Due to the design, the working direction of the wind blade in this device is always facing the generator unit side. When the wind force is normalized (when the fan is in a dynamic state), the bending and straightening action of the bending mechanism can keep the wind blade and the flange 4 plane on the same straight line, so that the fan can operate normally; when the wind force is large or strong, the adjustment action of the bending mechanism can make the wind blade tilt and move toward the axis, and the wind receiving area of ​​the wind blade is reduced, ensuring that the fan is always in a safe state. It can be seen from this that the wind turbine of the device adopts a reverse design, that is, when the wind force is greater, the blades 3 in the device can be moved away from the tower 6 under the automatic adjustment of the flange and the active connection mechanism 7 of the blades, thereby ensuring the overall safety and stability of the device and efficient power generation.

[0022] In practice, the folding wing drive 5 of the present device is a kind of device with a wind sensor ( Figure 2 The electromagnetic valve control driver (not shown) has a wind sensor that senses the wind force on the blades and drives the bending stroke of the active connection mechanism of the blades. It can also be a solenoid valve control driver with a pressure sensor ( Figure 2 When the pressure sensor senses the wind force on the blade, the hydraulic driver drives the active connection mechanism of the blade to bend against the wind. It can also be a tension-retractable ( Figure 2 When the wind force on the blade increases and the angle between the blade surface and the orthogonal wind is greater than 90°, the connecting rod driver drives the blade to receive the wind in the opposite direction. It is even better to collect all the windward data of the blade and integrate them into the folding wing driver through the computing power and architecture of AI.

[0023] In practice, the preparation of the device can be achieved in the following manner: first, a fixed position of the foundation tower is built, and then the tower is installed, and then the generator unit with the generator is hoisted on the top of the tower step by step by a crane, and a flange is installed at one end of the main shaft extending from the generator unit, and then a folding wing driver 5 is connected to one end of the flange 4, and a fan blade movable connection mechanism 7 is connected to the other end of the folding wing driver 5, and a fan blade 3 is connected to one end of the fan blade movable connection mechanism 7, and the working direction of the fan blade is facing the generator unit side, that is, with the fan blade 3. Figure 2 The above steps can also be completed mostly on the ground: the generator unit is hoisted by a crane, a flange is installed at one end of the main shaft extending from the generator unit, and a folding wing driver 5 is connected to one end of the flange 4, and then the crane is started to connect the fan blade movable connection mechanism 7 and the fan blade 3 at the other end of the folding wing driver 5.

[0024] The above embodiments illustrate that the folding wing drive and the active connection mechanism of the wind blade provided between the flange and the wind blade are actually a set of mechanical support components. In practice, the folding wing drive can use AI technology to establish a driving mode architecture model by collecting big data of meteorological data, and drive the active connection mechanism of the wind blade through computing power analysis and processing of meteorological data. It should be emphasized that no matter what physical action the folding wing drive adopts, it should ensure that the wind blade is normally unfolded, that is, the wind blade is at right angles to the extension line of the axis. Therefore, the mechanical source of this component has many forms, such as hydraulic pressure, air pressure, magnetic force, steel plate elasticity, etc. Figuratively speaking, the support component is a pressure yielding part. When the external pressure is greater than the set yield value, the support component yields, causing the blade to deflect from the unfolded state to the contracted state, reducing the wind receiving capacity of the wind blade. When the wind receiving capacity of the wind blade is reduced, the support component returns the blade to the original unfolded position. In particular, this state can be changed back and forth, so that the wind blade is always dynamically balanced under different wind pressures. This form enables the wind blade to achieve overpressure wind abandonment, thereby ensuring the safe operation of the fan under different wind conditions.

[0025] That is to say, the outstanding contribution of the technical solution of the present invention is specifically embodied in the following aspects: contrary to the kinetic energy generated by the wind turbine in the prior art, the present device causes the wind to flow from the generator end to the wind blades, and the wind-receiving working surface of the wind blades is on the generator side; the connection between the wind blades and the flange is realized based on the folding wing drive and the movable connection mechanism connecting the wind blades, to be precise, the folding wing drive and the movable connection mechanism connecting the wind blades drive the top of the blades to move toward the axial direction of the main shaft of the generator (similar to the action of an umbrella retracting the umbrella surface); and the bending deformation of the wind blades depends on the magnitude of the wind force received by the wind blades, and this bending deformation can be repeated. Moreover, according to the geographical location of the wind turbine and the wind collection data, the folding wing drive and the movable connection mechanism connecting the wind blades of the present device can set the force of the wind blades to unfold in advance, and when the wind blades are in the retracted state, the supporting force of the folding wing drive and the movable connection mechanism connecting the wind blades is equal to the yield pressure of the wind blades.

Claims

1. A wind power generation device with folding blades, comprising a blade generator main shaft, a generator unit, a blade, a flange, a folding blade driver, a tower, a flange and a movable connection mechanism for the blade; wherein: The tower is connected to the generator unit, and the generator main shaft arranged in the generator unit is coaxial with the flange, wherein one end of the flange is connected to a folding-wing driver, and one end of the folding-wing driver is connected to a fan blade movable connection mechanism, and the fan blade movable connection mechanism connects the fan blade; and the fan blade is a bendable movable wing, and the wingspan of the fan blade is bent and deformed by the fan blade movable connection mechanism connected by the folding-wing driver.

2. The wind power generation device with folding blades according to claim 1, characterized in that: The folding wing driver is an electromagnetic valve-controlled driver with a wind sensor, and the wind sensor senses the wind force on the fan blades and drives the bending stroke of the fan blade movable connection mechanism.

3. The wind power generation device with folding blades according to claim 1, characterized in that: The folding-wing driver is a hydraulic driver with a pressure sensor. When the pressure sensor senses the wind force on the fan blade, the hydraulic driver drives the fan blade movable connection mechanism to bend in the counterwind direction.

4. The wind power generation device with folding blades according to claim 1, characterized in that: The folding wing driver is a connecting rod driver with a push-pull spring. When the wind force of the fan blade increases and the angle between the blade surface and the orthogonal wind receiving angle is greater than 90°, the connecting rod driver drives the fan blade to receive the wind in reverse.

5. A method for preparing a wind power generation device with folding blades, comprising the steps of: building a foundation tower setting position, installing the tower, using a crane to hoist a generator unit with a generator on the top of the tower step by step, and installing a flange at one end of a main shaft extending from the generator unit, wherein: A folding wing driver is connected to one end of the flange, a blade movable connection mechanism is connected to the other end of the folding wing driver, a blade is connected to one end of the blade movable connection mechanism, and the working direction of the blade is made to face the generator unit.

6. The method for preparing a wind power generation device with folding blades according to claim 5, characterized in that: The generator unit hoisted by the crane, the flange installed at one end of the main shaft extending from the generator unit, and the folding-wing drive connected to one end of the flange are all completed step by step at the construction site, and then the crane is started to connect the fan blade movable connection mechanism at the other end of the folding-wing drive.

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