CN111927703A - Vertical axis wind turbine blade device - Google Patents

Abstract

The invention relates to the field of wind power generation, in particular to a vertical axis wind turbine blade device. The two ends of the main bracket are respectively fixed with blades, the two blades are arranged in a 180° rotation, and the two blades are used in pairs; the blades include a bracket, a swing rod group, a connecting rod group, a slider and a deceleration spring, and the slider is sleeved on the bracket. On the upper side, the slider slides back and forth along the axial direction of the bracket. The front and rear sides of the slider along the axial direction are respectively provided with deceleration springs. One end of the deceleration spring is fixedly connected to the bracket. The pendulum rod group includes several pendulum rods. One end is hinged with the front end of the swing rod, the connecting rod group includes several connecting rods, the slider is connected with each swing rod through the connecting rod, the front end of the connecting rod is hinged with the middle of the swing rod, and the rear end of the connecting rod is hinged with the slider. By changing the areas of the windward and leeward sides of the blade, the driving force of the windward side is improved, the resistance of the leeward side is reduced, the efficiency of the vertical axis wind turbine in converting wind energy into mechanical energy is improved, and the autonomous starting ability is improved.

Description

Vertical axis wind turbine blade device

technical field

The invention relates to the field of wind power generation, in particular to a vertical axis wind turbine blade device.

Background technique

With the global shortage of fossil fuels and increasing environmental problems, wind energy has received extensive attention as a renewable and clean energy source. Wind power generation converts the kinetic energy of the wind into mechanical energy, and then converts the mechanical energy into electrical energy. In a vertical axis wind turbine, the rotation axis of the rotor is perpendicular to the ground or the direction of the airflow. The wind turbine includes three parts: a wind wheel with a tail rudder, a generator and an iron tower. The wind wheel is an important part that converts the kinetic energy of the wind into mechanical energy. It consists of two or more blades. When the wind blows to the blade, aerodynamic force is generated on the blade to drive the wind wheel to rotate. Therefore, how to effectively obtain sufficient kinetic energy for the vertical axis wind turbine blades is the key to improving the power generation efficiency of the vertical axis wind turbine.

The blades of the existing vertical axis wind turbine are rigid, the projected area of the horizontal section of the windward surface and the leeward surface are equal, and the blades are independent of each other and do not interfere with each other. Since the horizontal projected areas of the windward and leeward sides of the blades are equal, the driving force will be the same when the airflow flows through the leeward side. Therefore, in order to prevent the equivalent driving force on the windward and leeward sides from hindering the rotation of the impeller, the number of blades is usually designed as odd number. Although the resistance can be reduced by optimizing the shape of the leeward surface, this design still has problems such as low utilization of wind energy, low power generation efficiency of the device, and difficulty in starting the fan.

SUMMARY OF THE INVENTION

The purpose of the present invention is to overcome the above-mentioned defects existing in the prior art, and propose a vertical axis wind turbine blade device. The efficiency of converting wind energy into mechanical energy by the vertical axis wind turbine is improved, and the problem that the existing vertical axis wind turbine is difficult to self-start is solved.

The technical scheme of the present invention is: a vertical axis wind turbine blade device, comprising a main support, a connecting rod and a blade, the central part of the main support is fixed with the main support rotation center axis, wherein, the two ends of the main support are respectively fixed with blades, The two blades are rotated 180°, and the two blades are used in pairs;

The blade includes a bracket, a swing rod group, a connecting rod group, a slider and a deceleration spring. The slider is sleeved on the bracket, and the slider slides back and forth along the axial direction of the bracket. There is a deceleration spring, one end of the deceleration spring is fixedly connected with the bracket, the swing rod group includes several swing rods arranged at intervals along the circumferential direction of the bracket, the front end of the bracket is hinged with the front end of the swing rod, the connecting rod group includes several connecting rods, sliding The blocks are respectively connected with the swing rods through connecting rods, the front end of the connecting rod is hinged with the middle of the swing rod, the rear end of the connecting rod is hinged with the slider, and the swing rod, the connecting rod and the slider form a rocker-slider mechanism;

The outer side of the swing rod is provided with a flexible cloth surface, the flexible cloth surface is fixed on the swing rod, the rear end of the bracket is fixedly connected with the end of the main bracket, the rear ends of the brackets of the two paired blades are fixedly connected through the main bracket, and the two The rear ends of the swing rods of the paired blades are connected by connecting rods.

In the present invention, one set of vanes may be provided, or multiple sets of vanes may be provided. When a set of blades is set, the main support is provided with a flywheel mechanism. When the blades drive the main support to rotate, the flywheel mechanism has a large moment of inertia. When the blades rotate to a position where the difference in driving force is very small, the flywheel mechanism releases the rotation. The energy drives the entire device to continue to rotate.

When multiple sets of blades are set, several main brackets are arranged at intervals up and down along the axis of the central axis of rotation of the main bracket, and several sets of blades are arranged in the vertical direction. The circumferential direction of the central axis of rotation is evenly distributed, and there is a height difference between each group of blades. By setting up multiple sets of blades with a certain angle between each other, the device can be in a state of being exposed to wind within a range of 360°. Driven by the wind energy, the blades of the blade can drive the main support connected to it to rotate, so that the central axis of rotation of the main support rotates, and then the other groups of blades connected to the central axis of rotation of the main support also start to work cyclically, ensuring the normal operation of the device. Startup and power generation work.

Select a swing rod close to the central axis of rotation of the main bracket from the two pairs of blades, respectively. End hinged.

One end of the deceleration spring facing the slider is fixed with a deceleration washer, the deceleration washer is slidably sleeved on the bracket, and the deceleration washer is located between the slider and the deceleration spring. Through the deceleration spring and the deceleration washer, the slider plays the role of deceleration and positioning.

The beneficial effects of the present invention are:

(1) The number of blades is an even number, the blades are arranged in pairs, and the blades work together to improve the working efficiency of the impeller;

(2) The design of variable cross-section improves the autonomous starting capability of the vertical axis wind turbine. The flexible cloth surface of the blade located in the windward position opens, and the flexible cloth surface of the blade located in the leeward position shrinks. The area is different, so the difference in driving force generated on the windward blade and the leeward blade makes the main bracket rotate. Even in the case of a small wind, the flexible cloth surface of the two blades has different areas, which can produce a large amount of damage on the two matching blades. The driving force is poor, thus driving the main bracket to rotate;

(3) By setting up multiple groups of blades, and there is a certain angle between the blades of each group, the device can be in a state of being exposed to the wind within a range of 360°, no matter what the wind direction or the change in the wind direction, the total There will be blades located at a certain position that can drive the main support connected to it to rotate under the drive of wind energy, which improves the efficiency of vertical axis wind turbines in converting wind energy into mechanical energy and improves the ability of vertical axis wind turbines to start autonomously. .

Description of drawings

Fig. 1 is the main sectional structure schematic diagram of the blade in the present invention;

Fig. 2 is the three-dimensional structure schematic diagram of the blade in the present invention;

Fig. 3 is the motion analysis structure schematic diagram of the present invention;

4 is a schematic top view of the structure of the present invention when the blade moves to a limit state in Embodiment 1;

Fig. 5 is the front view structure schematic diagram of the present invention when the blade moves to the limit state in embodiment 1;

6 is a schematic top view of the structure of the present invention when the blade moves to an intermediate state in Embodiment 1;

Fig. 7 is the front view structure schematic diagram of the present invention when the blade moves to the initial state in embodiment 1;

FIG. 8 is a schematic structural diagram of the present invention in Embodiment 2. FIG.

In the figure: 1 slider; 1-1 slider I; 1-2 slider II; 2 deceleration washer; 3 deceleration spring; 4 bracket; 4-1 bracket I; 4-2 bracket II; 5 swing rod; 5- 1 swing rod I; 5-2 swing rod II; 6 connecting rod; 6-1 connecting rod I; 6-2 connecting rod II; 7 flexible cloth surface; 8 main bracket; 9 connecting rod; 11 Towers.

Detailed ways

In order to make the above objects, features and advantages of the present invention more clearly understood, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

In the following description, specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar promotions without departing from the connotation of the present invention. Accordingly, the present invention is not limited by the specific embodiments disclosed below.

The vertical axis wind turbine blade device of the present invention includes a main bracket, a connecting rod and a blade. The main bracket is installed on the iron tower, and the center of the main bracket is fixed with a rotation center axis of the main bracket. The rotation center axis of the main bracket is connected with the gearbox or The generator is connected, and the two ends of the main bracket are respectively fixed with blades. The two blades connected with the same main bracket form a group, and the two blades cooperate with each other to drive the main bracket to rotate. The rotation center axis of the main support rotates with the main support, and the generator is driven to generate electricity during the rotation of the rotation center axis of the main support.

In the present invention, a plurality of main brackets are arranged at intervals up and down along the axial direction of the central axis of rotation of the main bracket, that is, a plurality of blades are arranged in the vertical direction, and the blades are evenly arranged along the circumferential direction of the central axis of rotation of the main bracket 10, and between the blades of each group There is a height difference, leaving room for the connecting rod to move; at the same time, each group of blades is in a certain expanded state in the initial working state, that is, when the blades are in the initial working state, they have a certain initial windward area. By setting up multiple sets of blades with a certain angle between each other, the device can be in a state of being exposed to wind within a range of 360°. Driven by the wind energy, the blades of the blade can drive the main support connected to it to rotate, so that the central axis of rotation of the main support rotates, and then the other groups of blades connected to the central axis of rotation of the main support also start to work cyclically, ensuring the normal operation of the device. Startup and power generation work.

As shown in FIG. 1 and FIG. 2 , the blade of the present invention includes a bracket 4, a swing rod group, a connecting rod group, a slider 1 and a deceleration spring 3. The slider 1 is sleeved on the bracket 4, and the slider 1 can move along the The axial direction of the bracket 4 reciprocates sliding. The front and rear sides of the slider 1 in the axial direction are respectively provided with deceleration springs 3, one end of the deceleration spring 3 is fixedly connected with the bracket 4, the other end of the deceleration spring 3 is fixed with a deceleration washer 2, and the deceleration washer 2 is slidably sleeved on the bracket 4, the deceleration washer 2 is located between the slider 1 and the deceleration spring 3. When the slider 1 slides on the bracket 4, the deceleration spring 3 plays a role in decelerating and positioning the slider 1. At the same time, the deceleration spring 3 can realize the automatic reset of the slider 1, so that the blade returns to the initial working state from the limit state. . During the axial movement of the slider 1 along the bracket 4, when the slider 1 is in contact with the deceleration spring, the deceleration washer 2 is used to prevent the collision between the deceleration spring 3 and the slider 1, which greatly reduces the impact between the slider 1 and the deceleration spring. 3 Impact force during contact. Since the slider 1 reciprocates along the bracket 4 , a deceleration spring 3 and a deceleration washer 2 are provided at the two extreme positions where the slider moves along the bracket 4 .

The pendulum rod group includes several pendulum rods 5 spaced along the circumference of the bracket. One end of the bracket 4 is hinged with the front end of the pendulum rod 5 . In this embodiment, the pendulum rod is connected to the bracket 4 through pins. The connecting rod group includes several connecting rods 6, the slider 1 is respectively connected with each swing rod 5 through the connecting rod 6, the front end of the connecting rod 6 is hinged with the middle part of the swing rod 5, and the rear end of the connecting rod 6 is hinged with the slider 1, In this embodiment, the front end of the connecting rod 6 is connected with the swing rod 5 through a pin, and the other end of the connecting rod 6 is connected with the slider 1 . The outside of the swing rod 5 is provided with a flexible cloth surface 7 , and the flexible cloth surface 7 is fixed on the swing rod 5 . The front end of the bracket 4 is hinged with the swing rod 5 , and the rear end of the bracket 4 is fixedly connected with the end of the main bracket 8 .

Two ends of the main bracket 8 are respectively provided with blades, the two blades are arranged in a 180° rotation, and the two blades are used in pairs. The swing rods of the two blades are connected by a connecting rod 9. In the present invention, a swing rod close to the rotation center axis of the main bracket can be selected from the two paired blades, and the front ends of the two swing rods are connected with the bracket 4. The rear ends of the two pendulum rods are connected by a connecting rod 9, and the connecting rod 9 and the rear ends of the two pendulum rods adopt a hinged connection to ensure that the selected two pendulum rods and the connecting rod are in a plane, making a plane. sports.

As shown in FIG. 3 , in the blade structure, the swing rod 5, the connecting rod 6 and the slider 1 form a rocker-slider mechanism, so the blade in the present invention adopts a combination of a flexible cloth surface and a rocker-slider mechanism, and Blades need to be paired. When the impeller turns to the windward side, under the action of the wind, the flexible cloth surface 7 is gradually unfolded, the slider 1 slides toward the front end of the bracket, and the area of the windward side gradually increases. At the same time, through the rocker-slider mechanism, the swing bars of the matched blades are brought together, the slider slides to the rear end of the bracket, the flexible cloth surface 7 is gradually closed, and the area of the leeward surface is gradually reduced.

The two blades used together are connected by connecting rods. As shown in Figure 3, the blade at this time includes the windward blade on the right and the leeward blade on the left. In the initial stage of the windward expansion of the windward blade, the force area is small, and the ability of the blade to unfold is weak. The leeward surface area is large and the closing ability is strong. Under the action of the connecting rod 9 between the windward blade and the leeward blade, the closing force of the leeward blade is applied to the windward blade through the connecting rod 9, which enhances the unfolding ability of the windward blade. When the leeward blade shrinks, as the area of the leeward surface decreases, the shrinkage capacity of the leeward surface will also gradually decrease. At this time, the windward surface of the matching windward blade has a large area and strong unfolding force. The unfolding force of the blade is converted into the closing force of closing the blade, increasing the closing ability of the leeward blade.

According to the description of the above action principle, the flexible cloth surface of the right windward blade will drive the pendulum rod 5-2 to rotate around the O ₁ point under the action of the wind force, and the rotation of the pendulum rod 5-2 will drive the connecting rod 6-2 to do plane movement, and even The rod 6-2 makes a plane movement to drive the slider 1-2 to move toward the front end of the bracket 4-2, thereby realizing the expansion of the flexible cloth surface of the windward blade. In the same way, the leeward blade on the left acts on the wind force, the swing rod 5-1 rotates around O ₂ , the rotation of the swing rod 5-1 will drive the connecting rod 6-1 to make a plane motion, and the connecting rod 6-1 will make a plane motion to drive the sliding. The block 1-1 moves toward the front end of the bracket, thereby realizing the contraction of the flexible cloth surface. The presence of the connecting rod 9 enhances the expansion of the right windward blade and the retraction of the left leeward blade. During the unfolding process of the flexible cloth surface of the windward blade, the flexible blade of the leeward blade gradually shrinks, the area difference between the windward and leeward sides gradually increases, and the driving force difference between the windward and leeward sides increases accordingly, resulting in The difference in driving force causes the main support 9 to drive the central rotary shaft to rotate, thereby realizing power generation.

Example 1

As shown in FIGS. 4 to 7 , the vertical axis wind turbine blade device in this embodiment adopts a set of blades, and the assembled blades are respectively fixed and installed on the main support 8, and the swing rods of the two blades cooperate with each other between the swing rods. Connected by connecting rod 9 .

As shown in Figure 4 and Figure 5, when the two blades move to the limit position, the blade on the left is the leeward blade, and the flexible cloth surface of the leeward blade is in a fully contracted state at the moment of maximum leeward surface. The blade on the right side is the windward blade, which is the moment of the maximum windward surface, and the flexible cloth surface of the windward blade is in a fully expanded state. Using the area difference between the expansion of the flexible cloth surface of the windward blade and the contraction of the flexible cloth surface of the leeward blade, a driving force is generated. 10 turns.

When the central axis of rotation of the main support rotates through a certain angle, under the elastic force of the deceleration spring 3, the slider that reaches the limit position is pushed to the initial position, and the slider mechanism of the pendulum rod gradually resets and returns to the initial state of the blade, as shown in the figure. 6 and 7 to prepare for the next cycle of expansion and contraction of the two paired blades.

When only one set of blades is selected, in order to ensure the smooth operation of the two pairs of blades, a flywheel mechanism can be added to the main support. At the dead point, the flywheel mechanism releases the rotational energy, drives the whole device to continue to rotate, and drives the blades to leave the dead point, which ensures the cyclic action of the two paired blades and realizes the continuous power generation of the generator.

Example 2

Different from Embodiment 1, this embodiment includes two sets of blades. As shown in FIG. 8 , two main brackets are arranged at intervals up and down along the axial direction of the central axis of rotation of the main bracket, and two ends of the main bracket are respectively connected with blades, so two sets of blades are arranged in the vertical direction. The blades are evenly arranged along the circumference of the central axis of rotation of the main support, that is, the same angle exists between adjacent blades. By setting up multiple sets of blades with a certain angle between each other, the device can be in a state of being exposed to wind within a range of 360°. Driven by the wind energy, the blades of the blade can drive the main support connected to it to rotate, so that the central axis of rotation of the main support rotates, and then the other groups of blades connected to the central axis of rotation of the main support also start to work cyclically, ensuring the normal operation of the device. Startup and power generation work. At the same time, since the two main brackets are provided with a height difference in the vertical direction, there is a height difference between the two sets of blades, leaving room for movement of the connecting rod. Each group of blades is in a certain expanded state in the initial working state, that is, when the blades are in the initial working state, they have a certain initial windward area.

In this embodiment, blade A and blade B are connected to the same main support to form a first group of blades, and blade C and blade D are connected to another main support to form a second group of blades. The main bracket connected with the second group of blades is located above the main bracket connected with the first group of blades, so there is a vertical height difference between the first group of blades and the second group of blades. At the same time, an included angle of 90° is respectively set between two adjacent blades, that is, a 90° included angle is respectively set between the blade A, the blade C, the blade B, and the blade D. When blade A and blade B move to the limit position, blade C and blade D just move to the initial working state. At this time, blade A is in a fully contracted state, blade B is in a fully expanded state, and blade C and blade D are both in a certain state. In the unfolded state, it has a certain initial windward area.

The number of blades selected by the device is not limited to the two groups in this embodiment, and more than two groups of blades may also be selected.

Others are the same as in Example 1.

The vertical axis wind turbine blade device provided by the present invention has been described in detail above. The principles and implementations of the present invention are described herein by using specific examples, and the descriptions of the above embodiments are only used to help understand the method and the core idea of the present invention. It should be pointed out that for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can also be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention. The above description of the disclosed embodiments enables any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (5)

1. The utility model provides a vertical axis aerogenerator blade device, includes main support, connecting rod and blade, and the middle part of main support is fixed with main support center of revolution axle, its characterized in that: blades are respectively fixed at two ends of the main bracket, the two blades are rotatably arranged at 180 degrees, and the two blades are used in a matched mode;

the blade comprises a bracket (4), a swing rod group and a connecting rod group, the sliding block mechanism comprises a sliding block (1) and a speed reducing spring (3), wherein the sliding block (1) is sleeved on a support (4), the sliding block (1) slides in a reciprocating mode along the axial direction of the support (4), the speed reducing spring (3) is respectively arranged on the front side and the rear side of the sliding block (1) along the axial direction, one end of the speed reducing spring (3) is fixedly connected with the support (4), a swing rod group comprises a plurality of swing rods (5) which are arranged along the circumferential direction of the support at intervals, the front end of the support (4) is hinged with the front end of each swing rod (5), a connecting rod group comprises a plurality of connecting rods (6), the sliding block (1) is respectively connected with each swing rod (5) through the connecting rods (6), the front end of each connecting rod (6) is hinged with the middle of each swing rod (5), the rear end of each connecting rod (6) is hinged with the sliding block (;

the outer side of the oscillating rod (5) is provided with a flexible cloth cover (7), the flexible cloth cover (7) is fixed on the oscillating rod (5), the rear end of the support (4) is fixedly connected with the end part of the main support (8), the rear ends of the two paired blades are fixedly connected through the main support (8), and the rear ends of the oscillating rods of the two paired blades are connected through a connecting rod (9).

2. The vertical axis wind turbine blade assembly of claim 1, wherein: when a group of blades is arranged, a flywheel mechanism is arranged on the main bracket.

3. The vertical axis wind turbine blade assembly of claim 1, wherein: the interval sets up the several main support from top to bottom along main support center of rotation axle's axial, is equipped with several groups blade in vertical direction, the main support all with main support center of rotation axle fixed connection, each blade along main support center of rotation axle's circumference evenly distributed, there is the difference in height between each group blade.

4. The vertical axis wind turbine blade assembly of claim 1, wherein: one swing rod close to the rotary central shaft of the main support is selected from the two blades used in pair, the front ends of the two swing rods are connected with the support (4), the rear ends of the two swing rods are connected through a connecting rod (9), and the connecting rod (9) is hinged with the rear ends of the two swing rods.

5. The vertical axis wind turbine blade assembly of claim 1, wherein: one end of the speed reducing spring (3) facing the sliding block is fixed with a speed reducing washer (2), the speed reducing washer (2) is sleeved on the support (4) in a sliding mode, and the speed reducing washer (2) is located between the sliding block (1) and the speed reducing spring (3).

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