Wind-gathering adjustable wind energy breeze power generation equipment

Abstract

Wind gathering adjustable wind energy breeze power generation equipment comprises a rack, a variable wind gathering unit, a wind gathering acceleration unit and a power generation unit, the wind gathering acceleration unit is installed on the rack, the variable wind gathering unit is arranged above the wind gathering acceleration unit, and the power generation unit is connected to the lower portion of the wind gathering acceleration unit. And a lifting mechanism is arranged between the variable wind gathering unit and the wind gathering acceleration unit. The variable wind gathering unit is driven by the lifting mechanism to move up and down. The lifting mechanism controls the height of the upper-layer wind gathering unit according to different wind speeds, wind energy is captured and enters from an air inlet of the wind gathering unit, and the maximum wind speed is achieved at the minimum diameter part for power generation. The height-variable wind gathering and collecting unit is adopted to achieve the high-low wind speed automatic balancing function, the problems that normal power generation cannot be achieved due to the insufficient wind sweeping area at the low wind speed and shutdown is needed due to the too high wind speed are solved, the power generator works in the high-rotating-speed power generation state, stable power generation can be achieved at the high wind speed and the low wind speed, and the power generation wind speed range is increased; and the power generation efficiency is improved.

Description

Technical Field

[0001] The present invention relates to a wind power generation device, in particular to a power generation device capable of gathering wind and regulating breeze, belonging to the technical field of wind power generation. Background Art

[0002] As a renewable energy generation technology, micro-wind power generation does not produce greenhouse gas emissions, can effectively reduce dependence on traditional energy and reduce carbon emissions. Most of the current wind turbines are only suitable for use in places with sufficient wind sources and concentrated wind power. If used in areas with low wind speeds, they cannot generate electricity normally or the power generation efficiency is extremely low, which brings great limitations to the full utilization of wind natural resources.

[0003] The power of wind energy is proportional to the cube of wind speed. The power contained in the breeze is very small, and the power that the wind wheel can capture theoretically does not exceed 60% of the power contained in the wind. Therefore, the power that can be used to generate electricity in a breeze is even more negligible, resulting in a relatively low efficiency of breeze power generation. In addition, under existing technologies, the starting performance and power generation performance of breeze generators at low wind speeds still need to be improved.

[0004] Insufficient equipment stability. The high-frequency start-stop cycle of micro-wind power generation equipment can easily lead to accelerated equipment wear, affecting its service life and stability. Due to the low and unstable wind speed, frequent start-stop makes the mechanical parts and electronic components of the equipment more prone to failure, resulting in high operation and maintenance costs. Summary of the invention

[0005] In view of the shortcomings of existing wind power generation equipment, the present invention provides a wind-gathering and adjustable wind energy micro-wind power generation equipment which can generate electricity stably at both high and low wind speeds and has high power generation efficiency.

[0006] The wind-gathering and adjustable wind energy breeze power generation equipment of the present invention adopts the following technical solutions:

[0007] The device comprises a frame, a variable wind gathering unit, a wind gathering acceleration unit and a power generation unit. The wind gathering acceleration unit is installed on the frame, the variable wind gathering unit is arranged above the wind gathering acceleration unit, and the power generation unit is connected to the lower part of the wind gathering acceleration unit. A lifting mechanism is arranged between the variable wind gathering unit and the wind gathering acceleration unit. The variable wind gathering unit is driven to move up and down by the lifting mechanism.

[0008] The frame is provided with a positioning ring for radial positioning of the wind gathering and accelerating unit.

[0009] The variable wind gathering unit comprises a wind gathering channel, the upper and lower ends of which are respectively an air inlet and an air outlet, and the air inlet is gradually narrowed to the air outlet, the diameter of the air inlet is larger than the diameter of the air outlet, and the air outlet extends into the wind gathering port in the wind gathering acceleration unit. The outer side of the wind gathering channel is distributed with partitions, and a wind gathering cavity is formed between adjacent partitions, guiding the wind to enter the wind gathering acceleration unit along the partitions and the outer side of the wind gathering channel. The partitions are connected to the lifting mechanism, and each partition is connected to a set of lifting mechanisms.

[0010] The wind gathering and accelerating unit includes an accelerating flow channel and a throat. The throat is connected to the lower end of the accelerating flow channel. The upper end of the accelerating flow channel is an air gathering port, and the lower end is an increasing port. The diameter of the air gathering port is larger than the diameter of the increasing port and the diameter of the air outlet in the wind gathering unit. The upper port of the throat is larger than the lower port and the increasing port, and the increasing port extends into the upper port of the throat. Wind baffles are provided on the outer side of the accelerating flow channel, and adjacent wind baffles form a wind gathering cavity. The accelerating flow channel and the throat are connected together by the wind baffles, and the entire wind gathering and accelerating unit can also be fixed to the frame by the wind baffles.

[0011] The lifting mechanism includes a driving mechanism and a transmission mechanism, the transmission mechanism is connected to the driving mechanism, the driving mechanism is arranged on a frame or a wind gathering acceleration unit, and the transmission mechanism is connected to the driving mechanism and a variable wind gathering unit (specifically a partition). The driving mechanism can be a motor, and the motor drives the lifting and lowering of the wind gathering flow channel through the transmission mechanism, and the lifting height is controlled according to different wind speeds. The transmission mechanism can be a gear rack transmission mechanism, and can also be a screw nut pair moving mechanism.

[0012] The lifting mechanism may also directly adopt a hydraulic cylinder, a gas cylinder, an electric cylinder, etc., and its power output end is directly connected (hinged) to the variable wind gathering unit (specifically, the partition).

[0013] The power generation unit includes a connecting flange and a generator, wherein the connecting flange is arranged on the inner wall of the generator. The generator is connected to the lower end of the wind gathering and accelerating unit (specifically, the lower end of the throat) through the connecting flange. The connecting flange is connected to a diffuser, and the wind passing through the power generation unit is discharged from the diffuser port, thereby reducing the outlet wind speed and the noise of the entire power generation equipment, thereby achieving low-noise operation.

[0014] Wind energy is captured by the wind collection unit inlet. The lifting mechanism automatically controls the height of the upper wind collection unit according to different wind speeds. The wind energy passes through the wind collection channel and enters the acceleration channel. It is then accelerated through the throat and reaches the maximum wind speed at the minimum diameter part, and enters the generator to generate electricity. When the wind speed is low, the wind collection unit is raised by the upgrading mechanism. When the wind speed is high, the wind collection unit is lowered, thereby ensuring the stability of the generator efficiency under different wind speeds.

[0015] The present invention adopts a variable-height wind gathering and collecting unit to realize the automatic balancing function of high and low wind speeds, which solves the problems of insufficient wind sweeping area for normal power generation under low wind speed and the need to shut down due to too high wind speed, avoids frequent starting and stopping of the generator, enables the generator to operate in a high-speed power generation state, and realizes stable power generation under high and low wind speeds, increases the power generation wind speed range, improves power generation efficiency, reduces equipment failure rate, and reduces maintenance and operation costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the wind-collecting and adjustable wind energy micro-wind power generation equipment of the present invention.

[0017] Figure 2 It is a structural front view of the wind-collecting and adjustable wind energy micro-wind power generation equipment of the present invention.

[0018] Figure 3 It is a structural schematic diagram of the power generation unit in the present invention.

[0019] Figure 4 It is a schematic diagram of test data of the wind-collecting and adjustable wind energy micro-wind power generation equipment of the present invention.

[0020] In the figure: 1. Variable wind gathering unit, 2. Wind gathering acceleration unit, 3. Rack, 4. Power generation unit;

[0021] 101. air gathering channel, 102. partition, 103. rack, 104. motor, 105. air inlet, 106. air outlet;

[0022] 201. Accelerating flow channel, 202. Wind baffle, 203. Air gathering port, 204. Throat pipe, 205. Diffuser, 206. Upper port, 207. Speed ​​increasing port;

[0023] 301. Positioning ring;

[0024] 401. Connecting flange, 402. Generator, 403. Turbofan impeller. DETAILED DESCRIPTION

[0025] like Figure 1 As shown, the wind-gathering adjustable wind energy micro-wind power generation device of the present invention comprises a frame 3, a variable wind-gathering unit 1, a wind-gathering acceleration unit 2 and a power generation unit 4. The wind-gathering acceleration unit 2 is mounted on the frame 3, the variable wind-gathering unit 1 is arranged above the wind-gathering acceleration unit 2, and the power generation unit 4 is connected to the lower part of the wind-gathering acceleration unit 2. A lifting mechanism is arranged between the variable wind-gathering unit 1 and the wind-gathering acceleration unit 2, and the variable wind-gathering unit 1 is driven to move up and down by the lifting mechanism.

[0026] See also Figure 1 and Figure 2The variable wind gathering unit 1 includes a wind gathering channel 101 and a partition 102. The wind gathering channel 101 is trumpet-shaped, and its upper and lower ends are respectively an air inlet 105 and an air outlet 106 (see Figure 2 ), it is gradually narrowed along the direction from the air inlet 105 to the air outlet 106, the diameter of the air inlet 105 is larger than the diameter of the air outlet 106, and the ratio of the two is the ratio of the wind speed. The air outlet 106 extends into the air gathering port 203 in the wind gathering acceleration unit 2. A plurality of evenly distributed axial partitions 102 are arranged on the outer side of the wind gathering flow channel, and a wind gathering cavity is formed between adjacent partitions 102, which guides the wind to enter the air gathering port 203 of the wind gathering acceleration unit 2 along the outer side of the partition 102 and the wind gathering flow channel. The number of partitions 102 can be determined according to the specific situation.

[0027] Each partition 102 is connected to a set of lifting mechanism, which includes a driving mechanism and a transmission mechanism. The transmission mechanism is connected to the driving mechanism, the driving mechanism is arranged on the wind gathering acceleration unit 2, and the transmission mechanism connects the driving mechanism and the partition 102. The driving mechanism can use a motor 104, and the driving motor 104 can be a servo motor, a stepping motor, or a common motor. The motor 104 drives the lifting and lowering of the wind gathering flow channel 1 through the transmission mechanism, and controls the lifting height according to different wind speeds. The transmission mechanism can be a gear rack transmission mechanism, the gear is installed on the driving motor 104, the rack 103 is arranged on the partition 102, and the gear 103 and the rack are meshed; or a screw nut pair moving mechanism can be used, the screw is installed on the wind gathering acceleration unit 2 and connected to the driving motor 104, the nut is installed on the driving motor 104, and the nut is connected to the screw. The lifting mechanism can also directly use a hydraulic cylinder, a cylinder, an electric cylinder, etc., and its power output end is directly connected (hinged) to the partition 102. When the wind speed is low, the wind gathering flow channel 101 is automatically controlled to rise, and when the wind speed is high, the wind gathering flow channel 101 is automatically controlled to lower, thereby ensuring the stability of the generator efficiency under different wind speeds, avoiding frequent starting and stopping of the generator equipment due to wind speed problems, and reducing maintenance costs.

[0028] 201. Accelerating flow channel, 202. Air baffle, 203. Air gathering port, 204. Throat pipe, 205. Diffuser, 206. Upper port, 207. Speed ​​increasing port,

[0029] See also Figure 1 and Figure 2The wind gathering acceleration unit 2 includes an acceleration channel 201, a wind baffle 202 and a throat 204. The wind baffle 202 is arranged on the outer side of the acceleration channel 201. Adjacent wind baffles 202 form a wind gathering cavity. The acceleration channel 201 and the throat 204 are connected together up and down through the wind baffles 202. The number of wind baffles 204 is determined according to specific circumstances. The entire wind gathering acceleration unit 2 is fixed on the frame 3 through the wind baffle 202. The frame 3 is also provided with a positioning ring 301 for radial positioning of the throat 204. The acceleration channel 201 is trumpet-shaped, with an upper end being a wind gathering port 203 and a lower end being a speed increasing port 207. The diameter of the wind gathering port 203 is larger than the diameter of the speed increasing port 207, and is also larger than the diameter of the air outlet 106 in the variable wind gathering unit 1. The speed increasing function is realized by using the Venturi effect. The throat 204 is also trumpet-shaped, and the inner diameter of the upper port 206 is larger than the lower port, and the upper port 206 is larger than the speed increasing port 207, and the speed increasing port 207 extends into the upper port 206 of the throat 204. The ratio of the diameter of the wind gathering port 203 to the diameter of the speed increasing port 207 is the wind speed ratio. The guided wind enters the speed increasing channel 201 along the wind baffle 204 and the outer side of the speed increasing channel 201, and then enters the power generation unit 4. The number of wind baffles 204 is determined according to the specific situation.

[0030] The shapes of the air-collecting flow channel 101 , the accelerating flow channel 201 and the throat pipe 204 include but are not limited to circular, square and other shapes.

[0031] The power generation unit 4 is arranged in the throat of the throat pipe 204. Figure 3 , including a connecting flange 401 and a generator 402. The connecting flange 401 is fixedly connected to the inner wall of the generator 402, and the generator 402 is connected to the lower end of the throat 204 through the connecting flange 401. The generator 402 adopts an existing magnetic suspension axial generator, on which a turbofan impeller 403 is arranged. The wind drives the turbofan impeller 403 to rotate, converts wind energy into kinetic energy, and transmits it to the generator 402 to generate electricity.

[0032] The connection flange 401 is also connected to a diffuser 205 , and the wind passing through the power generation unit 4 is discharged from the diffuser 205 . The diffuser 205 is mainly used to reduce the outlet wind speed and reduce the noise of the entire power generation equipment to achieve low-noise operation.

[0033] The lifting mechanism automatically controls the height of the upper wind-collecting channel 101 according to different wind speeds. Wind energy is captured and enters the wind-collecting unit through the air inlet 105, passes through the wind-collecting channel 101 and enters the acceleration channel 201, and is then accelerated through the throat 204, reaching the maximum wind speed at the minimum diameter part, blowing the turbofan impeller 403 to rotate, and generating electricity through the generator 402.

[0034] The variable wind gathering unit and the wind gathering acceleration unit realize both the variable wind gathering function and the double wind acceleration function, thereby ensuring that the power generation unit 203 operates in a high wind speed operation state and improving the power generation efficiency.

[0035] Power generation P (unit W) and wind sweeping area A (unit m 2 ) is:

[0036] P=0.5*A*ρ*V 3 *K;

[0037] Where: ρ is the air density, 1.25kg / m 3 ; V is the generator wind speed; K is the wind energy conversion rate.

[0038] The calculation formula of the swept area A is A=A0+A1. A0 is the fixed swept area, in m 2 ; A1 is the adjustable wind sweeping area, unit is m 2 .

[0039] The calculation formula of the generator wind speed V is: V = V0 + V1. Where: V0 = D200 / D201, V1 = D100 / D101,

[0040] Under the condition that the wind speed in the wind farm remains unchanged, the wind sweeping area A is increased by the variable wind focusing technology of the present invention, and the wind speed V of the generator is increased by the wind focusing and speed increasing technology, thereby improving the power generation efficiency.

[0041] Tests have shown that the wind power generation equipment with this structure has a power generation efficiency that is more than 5 times higher than that of the wind power generation equipment without this structure.

[0042] Although wind power generation can be achieved by increasing the size of the air gathering port, increasing the wind sweeping area, or increasing the overall height of the generator to obtain a higher wind speed, the production and maintenance costs increase.

[0043] Figure 4 The test data of the wind-collecting and adjustable wind energy micro-breeze power generation equipment of the present invention are given. It can be seen from the test data that under the same wind force, the power generation of the power generation equipment of the present invention is significantly improved compared with the power generation of the existing power generation equipment of the same specification.

Claims

1. A wind-gathering and adjustable wind energy breeze power generation device, characterized in that: The invention comprises a frame, a variable wind gathering unit, a wind gathering acceleration unit and a power generation unit, wherein the wind gathering acceleration unit is installed on the frame, the variable wind gathering unit is arranged above the wind gathering acceleration unit, and the power generation unit is connected to the lower part of the wind gathering acceleration unit. A lifting mechanism is arranged between the variable wind gathering unit and the wind gathering acceleration unit.

2. The wind-gathering and adjustable wind energy micro-wind power generation equipment according to claim 1 is characterized in that: The frame is provided with a positioning ring for radial positioning of the wind gathering and accelerating unit.

3. The wind-gathering and adjustable wind energy micro-wind power generation equipment according to claim 1 is characterized in that: The variable wind gathering unit includes a wind gathering flow channel, the upper and lower ends of which are an air inlet and an air outlet respectively, and the air flow channel is gradually narrowed from the air inlet to the air outlet. The diameter of the air inlet is larger than the diameter of the air outlet, and the air outlet extends into the wind gathering port in the wind gathering acceleration unit.

4. The wind-gathering and adjustable wind energy micro-wind power generation equipment according to claim 3 is characterized in that: Partitions are distributed on the outer side of the wind-gathering flow channel, and a wind-gathering cavity is formed between adjacent partitions.

5. The wind-gathering and adjustable wind energy micro-wind power generation equipment according to claim 4 is characterized in that: The partition is connected to the lifting mechanism, and each partition is connected to a set of lifting mechanism.

6. The wind-gathering and adjustable wind energy micro-wind power generation equipment according to claim 1 is characterized in that: The wind gathering and accelerating unit comprises an accelerating flow channel and a throat, wherein the throat is connected to the lower end of the accelerating flow channel, the upper end of the accelerating flow channel is a wind gathering port, and the lower end is a speed increasing port. The diameter of the wind gathering port is larger than the diameter of the speed increasing port and the diameter of the air outlet in the wind gathering unit, the upper port of the throat is larger than the lower port and the speed increasing port, and the speed increasing port extends into the upper port of the throat.

7. The wind-gathering and adjustable wind energy micro-wind power generation equipment according to claim 6 is characterized in that: The outer side surface of the accelerating flow channel is provided with a wind partition plate, and adjacent wind partition plates form a wind gathering cavity.

8. The wind-gathering and adjustable wind energy micro-wind power generation equipment according to claim 1 is characterized in that: The lifting mechanism comprises a driving mechanism and a transmission mechanism, wherein the transmission mechanism is connected to the driving mechanism, the driving mechanism is arranged on a frame or a wind gathering and accelerating unit, and the transmission mechanism is connected to the driving mechanism and the variable wind gathering unit.

9. The wind-gathering and adjustable wind energy micro-wind power generation equipment according to claim 1 is characterized in that: The lifting mechanism adopts a hydraulic cylinder, a gas cylinder or an electric cylinder.

10. The wind-gathering and adjustable wind energy micro-wind power generation equipment according to claim 1 is characterized in that: The power generation unit comprises a connecting flange and a generator, wherein the connecting flange is arranged on the inner wall of the generator.

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