Wind-gathering speed-increasing feedback breeze power generation equipment

Abstract

Wind gathering acceleration feedback breeze power generation equipment comprises a rack, a wind gathering acceleration unit, a feedback unit, a wind energy adjusting unit and a power generation unit, the wind gathering acceleration unit and the feedback unit are arranged on the rack, the wind energy adjusting unit and the power generation unit are both arranged in the wind gathering acceleration unit, the wind energy adjusting unit is located above the power generation unit, and the feedback unit is located above the power generation unit. The feedback unit is distributed on the periphery of the wind gathering acceleration unit and arranged between the upper port and the lower port of the wind gathering acceleration unit. Wind energy is captured by an air inlet of the wind gathering acceleration unit, wind power reaches the maximum wind speed at the position of the minimum diameter after being collected and subjected to diameter changing acceleration, the wind power enters the power generation unit to generate power, and the wind power generated after power generation is fed back to the air inlet of the wind gathering acceleration unit through the feedback unit. The wind speed is increased, the low-wind-speed power generation capacity is improved, frequent starting and stopping of the power generator are avoided, the power generation problems that low-wind-speed power generation is not easy to start and high-wind-speed power generation needs to be stopped are solved through wind energy adjustment, and meanwhile 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] 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 will not be able to generate electricity normally or the power generation efficiency will be extremely low, which will bring great limitations to the full utilization of wind natural resources.

[0004] Technically, the efficiency of power generation is limited. The power of wind energy is proportional to the cube of the 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. And under the existing technology, the starting performance and power generation performance of breeze generators at low wind speeds still need to be improved.

[0005] 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

[0006] In view of the shortcomings of existing wind power generation equipment, the present invention provides a wind-gathering, speed-increasing and feedback micro-wind power generation equipment which can generate electricity stably at both high and low wind speeds and has high power generation efficiency.

[0007] The wind-gathering, speed-increasing and feedback micro-wind power generation equipment of the present invention adopts the following technical solutions:

[0008] The device includes a frame, a wind gathering and acceleration unit, a feedback unit, a wind energy regulating unit and a power generation unit. The wind gathering and acceleration unit and the feedback unit are arranged on the frame, the wind energy regulating unit and the power generation unit are both arranged in the wind gathering and acceleration unit, the wind energy regulating unit is located above the power generation unit, and the feedback unit is distributed on the periphery of the wind gathering and acceleration unit and is arranged between the upper port and the lower port of the wind gathering and acceleration unit.

[0009] The frame is provided with a positioning ring for radially positioning the wind gathering and accelerating unit.

[0010] The wind gathering and accelerating unit comprises a variable diameter speed-increasing channel, a power generation channel and a diffuser which are sequentially arranged from top to bottom. The upper port of the variable diameter speed-increasing channel is a wind gathering port, and the diameter of the wind gathering port is larger than the inner diameter of the power generation channel. The wind energy regulating unit is connected to the variable diameter speed-increasing channel, and the power generation unit is arranged in the power generation channel. A transition channel is arranged between the variable diameter speed-increasing channel and the power generation channel, so that the inner diameter of the lower port of the variable diameter speed-increasing channel transitions to the inner diameter size of the power generation channel.

[0011] Wind baffles are arranged on the outside of the variable diameter speed increasing channel, and a wind gathering cavity is formed between adjacent wind baffles. Each wind gathering cavity realizes the wind gathering function and guides the wind to enter the power generation channel along the wind baffles.

[0012] The feedback unit includes a feedback pipe and a one-way valve. The one-way valve is arranged in the feedback pipe. The upper end of the feedback pipe is an air outlet, and the lower end is an air inlet. The air inlet and the air outlet are respectively located in the diffuser and the air gathering port of the wind gathering acceleration unit. The one-way valve adopts a Tesla one-way valve. The wind can only flow from the air inlet to the air outlet through the one-way valve, and the wind energy remaining after power generation is used to enter the wind gathering unit again along the feedback pipe through the diffuser, so that the wind speed used for power generation is faster and more stable.

[0013] The wind energy regulating unit comprises a connecting flange, a rotating blade and a control motor. One side of the connecting flange is provided with circumferentially distributed rotating blades. The control motor is mounted on the other side of the connecting flange. One rotating blade is mounted on the motor shaft of the control motor. The other rotating blades are mounted on the connecting flange via a rotating shaft. The rotating blades are hinged together in sequence via connecting rods. The rotating blade is driven to rotate by the control motor, and the other rotating blades rotate accordingly. Through the opening and closing of the rotating blades, a ventilation hole with adjustable diameter is finally formed, thereby adjusting the wind energy entering the power generation channel.

[0014] The power generation unit comprises a connecting flange and a generator, wherein the connecting flange is arranged on the inner wall of the generator, the connecting flange is connected to the lower end of the power generation channel in the wind gathering and accelerating unit, and the generator adopts an existing magnetic suspension axial generator.

[0015] Wind energy is captured at the air inlet of the wind gathering and acceleration unit. After being collected and increased in diameter, the wind reaches the maximum wind speed at the minimum diameter and enters the power generation unit for power generation. The wind after power generation is then fed back to the air inlet of the wind gathering and acceleration unit by the feedback unit.

[0016] The present invention improves the wind speed and the low wind speed power generation capacity through the wind gathering and feedback functions of the wind gathering acceleration unit and the feedback unit, avoids the frequent start and stop of the generator, and reduces the maintenance and operation costs; through wind energy regulation, it solves the power generation problems of difficulty in starting at low wind speed and needing to shut down at high wind speed, and at the same time improves the power generation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the wind gathering, speed increasing and feedback micro-wind power generation equipment of the present invention.

[0018] Figure 2 It is a structural front view of the wind gathering, speed increasing and feedback micro-wind power generation equipment of the present invention.

[0019] Figure 3 yes Figure 2 Top view of the .

[0020] Figure 4 It is a schematic diagram of the structure of the wind-gathering acceleration unit in the present invention; wherein: (a) is the front view, and (b) is the left view.

[0021] Figure 5 It is a structural schematic diagram of the wind energy regulating unit in the present invention; wherein: (a) is a front view, and (b) is a top view.

[0022] Figure 6 It is a structural front view of the power generation unit in the present invention.

[0023] In the figure: 1. Wind gathering and acceleration unit, 2. Feedback unit, 3. Rack, 4. Wind energy regulation unit, 5. Power generation unit;

[0024] 101. air gathering port, 102. wind baffle, 103. variable diameter speed increasing channel, 104. transition channel, 105. power generation channel, 106. diffuser;

[0025] 201. air outlet, 202. one-way valve, 203. air inlet, 204. feedback pipe;

[0026] 301. Positioning ring;

[0027] 401. Connecting flange, 402. Rotating blades, 403. Control motor;

[0028] 501. Connecting flange, 502. Generator, 503. Turbofan impeller. DETAILED DESCRIPTION

[0029] like Figure 1 , Figure 2 and Figure 3As shown, the wind-gathering, speed-increasing and feedback micro-wind power generation equipment of the present invention comprises a frame 3, a wind-gathering acceleration unit 1, a feedback unit 2, a wind energy regulating unit 4 and a power generation unit 5. The wind-gathering acceleration unit 1 and the feedback unit 2 are fixedly connected to the frame 3, and a positioning ring 301 for radially positioning the wind-gathering acceleration unit 1 is provided on the frame 3. The wind energy regulating unit 4 and the power generation unit 5 are both arranged in the wind-gathering acceleration unit 1, and the wind energy regulating unit 4 is above the power generation unit 5. The feedback unit 2 is distributed on the periphery of the wind-gathering acceleration unit 1, and is arranged between the upper port (wind gathering port) and the lower port (diffuser port 106) of the wind-gathering acceleration unit 1.

[0030] The wind gathering acceleration unit 1 utilizes the Venturi effect to realize the speed increasing function, and its structure includes a variable diameter speed increasing channel 103, a transition channel 104, a power generation channel 105 and a diffuser 106 arranged in sequence from top to bottom. The variable diameter speed increasing channel 103 is trumpet-shaped, and its upper end is a wind gathering port 101. A wind baffle 102 is arranged on the outside of the variable diameter speed increasing channel 103 to support the variable diameter speed increasing channel 103. A wind gathering cavity is formed between adjacent wind baffles 102. Each wind gathering cavity realizes the wind gathering function and guides the wind along the wind baffle 102 into the power generation channel 105. The diameter of the wind gathering port 101 is different from the inner diameter of the power generation channel 105. The diameter of the wind gathering port 101 is larger than the inner diameter of the power generation channel 105, and the ratio between the two is the ratio of the wind speed. The transition channel 104 is in an inverted cone shape and is connected to the lower end of the variable diameter and speed-increasing channel 103. The power generation channel 105 is connected to the transition channel 104. The transition channel 104 makes the inner diameter of the lower port of the variable diameter and speed-increasing channel 103 transition to the inner diameter size of the power generation channel 105. The function of the diffuser 106 is mainly to reduce the exhaust speed after power generation and reduce the noise of the entire power generation equipment to achieve low-noise operation. The wind energy regulation unit 4 is connected to the variable diameter and speed-increasing channel 103. The power generation unit 5 is arranged in the power generation channel 105.

[0031] See also Figure 2 and Figure 4The feedback unit 2 includes a feedback pipe 204 and a one-way valve 202. The one-way valve 202 is arranged in the feedback pipe 204. The direction of the one-way valve 202 is set from bottom to top. The direction from bottom to top is the direction of opening ventilation, and vice versa, the wind flow is blocked. The one-way valve 202 adopts a Tesla one-way valve. The upper port of the feedback pipe 204 is the air outlet 201, and the lower port is the air inlet 203. The air inlet 203 and the air outlet 201 are respectively located in the diffuser 106 and the air gathering port 101. The wind can only flow from the air inlet 203 to the air outlet 201 through the one-way valve 202. The wind energy remaining after power generation is used to enter the entrance (air gathering port 101) of the wind gathering unit 1 again along the feedback unit 2 by using the diffuser 106. The one-way valve 202 realizes that the wind energy can only flow in one direction, and at the same time, the feedback airflow enters the air gathering port 101 more smoothly. In this way, the wind speed for power generation is faster and more stable, thereby ensuring that the power generation unit 5 operates stably at high wind speeds and improving power generation efficiency.

[0032] See also Figure 5 The wind energy regulating unit 4 includes a connecting flange 401, a rotating blade 402 and a control motor 403. One side of the connecting flange 401 is provided with circumferentially distributed rotating blades 402, and the control motor 403 is installed on the other side of the connecting flange 401. The motor shaft of the control motor 403 is connected to one of the rotating blades 402, and the remaining rotating blades are installed on the connecting flange 401 through a rotating shaft. Each rotating blade 402 is hinged together through a connecting rod in turn. The rotating blade is driven to rotate by the control motor 403, and the remaining rotating blades follow the rotation. According to the wind speed, the speed of the control motor 403 is controlled to automatically adjust the angle of the rotating blade 402. Through the opening and closing of each rotating blade 402, a ventilation hole with adjustable diameter is finally formed, thereby adjusting the wind energy entering the power generation channel 105, avoiding the problem of shutting down due to excessive wind speed. The entire wind energy regulating unit 4 is connected to the variable diameter speed-increasing channel 103 through the connecting flange 401.

[0033] The power generation unit 5 is arranged in the power generation channel 105. Figure 6 , including a connecting flange 501 and a generator 502. The connecting flange 501 is fixedly connected to the inner wall of the generator 502, and the generator 502 is connected to the lower end of the power generation channel 105 through the connecting flange 501. The generator 502 adopts an existing magnetic suspension axial generator, on which a turbofan impeller 503 is arranged. The wind drives the turbofan impeller 503 to rotate, converts wind energy into kinetic energy, and transmits it to the generator 502 to achieve power generation.

[0034] The cross-sectional shapes of the variable diameter speed increasing channel 103 , the transition channel 104 , the power generation channel 105 , the diffuser 106 , and the feedback tube 204 include but are not limited to circular, square, and other shapes.

[0035] Although wind power generation can be achieved by increasing the size of the air gathering port to increase the wind sweeping area or increasing the overall height of the generator to obtain a higher wind speed, its manufacturing cost and maintenance cost will increase.

[0036] Power generation P (unit W) and wind sweeping area A (unit m 2 ) is:

[0037] P=0.5*A*ρ*V 3 *K;

[0038] Where: ρ is the air density, 1.25kg / m 3 ; V is the generator wind speed; K is the wind energy conversion rate.

[0039] 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 .

[0040] The calculation formula of the generator wind speed V is: V = V0 + V1. Where: V0 is the original inlet wind speed, V1 = D 100 / D 105 , D 100 and D 105 They are the diameter of the air gathering port 101 and the inner diameter of the power generation channel 105 respectively.

[0041] 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.

[0042] Through the formula P = 0.5*A*ρ*V 3 *K calculation shows:

[0043] Non-increasing power P0=0.5*A*ρ*V 3 *K;

[0044] After speed increase, power P1=0.5*A*ρ*V 3 *K;

[0045] The power ratio of the speed-up and non-speed-up P1 = (V1 / V) 3 * / P0;

[0046] No feedback power P2=0.5*A*ρ*(V) 3 *K;

[0047] With feedback, the power is increased △P=0.5*A*ρ*(V2-V) 3 *K;

[0048] Power after speed increase feedback P 发=P1+△P.

[0049] When the wind speed in the wind farm remains unchanged, the wind speed V of the generator is increased through wind gathering and speed increase feedback technology, thereby improving the power generation efficiency.

[0050] When the wind speed V1 increases by 10%, the power P1 increases by 33%. When the wind speed V1 increases by 2 times, the power P1 increases by 33%. 发 Increased by more than 6.5 times.

Claims

1. A wind-gathering, speed-increasing and feedback micro-wind power generation device, characterized in that: It includes a frame, a wind gathering acceleration unit, a feedback unit, a wind energy regulating unit and a power generation unit. The wind gathering acceleration unit and the feedback unit are arranged on the frame, the wind energy regulating unit and the power generation unit are both arranged in the wind gathering acceleration unit, the wind energy regulating unit is located above the power generation unit, and the feedback unit is distributed on the periphery of the wind gathering acceleration unit and is arranged between the upper port and the lower port of the wind gathering acceleration unit.

2. The wind-gathering, speed-increasing and feedback micro-wind power generation equipment according to claim 1 is characterized in that: The frame is provided with a positioning ring for radially positioning the wind gathering and accelerating unit.

3. The wind-gathering, speed-increasing and feedback micro-wind power generation equipment according to claim 1 is characterized in that: The wind gathering and accelerating unit comprises a variable diameter speed-increasing channel, a power generation channel and a diffuser which are sequentially arranged from top to bottom. The upper end of the variable diameter speed-increasing channel is a wind gathering port, and the diameter of the wind gathering port is larger than the inner diameter of the power generation channel. The wind energy regulating unit is connected in the variable diameter speed-increasing channel, and the power generation unit is arranged in the power generation channel.

4. The wind-gathering, speed-increasing and feedback micro-wind power generation equipment according to claim 3 is characterized in that: A transition channel is arranged between the variable diameter speed increasing channel and the power generation channel.

5. The wind-gathering, speed-increasing and feedback micro-wind power generation equipment according to claim 1 is characterized in that: Wind baffles are arranged on the outer side of the variable diameter and speed increasing channel, and a wind gathering cavity is formed between adjacent wind baffles.

6. The wind-gathering, speed-increasing and feedback micro-wind power generation equipment according to claim 1 is characterized in that: The feedback unit includes a feedback pipe and a one-way valve. The one-way valve is arranged in the feedback pipe. The upper end of the feedback pipe is an air outlet, and the lower end is an air inlet. The air inlet and the air outlet are respectively located in the diffuser and the air gathering port of the wind gathering acceleration unit.

7. The wind-gathering, speed-increasing and feedback micro-wind power generation equipment according to claim 1 is characterized in that: The one-way valve is a Tesla one-way valve.

8. The wind-gathering, speed-increasing and feedback micro-wind power generation equipment according to claim 1 is characterized in that: The wind energy regulating unit includes a connecting flange, rotating blades and a control motor. One side of the connecting flange is provided with circumferentially distributed rotating blades, and the control motor is installed on the other side of the connecting flange. One rotating blade is installed on the motor shaft of the control motor, and the remaining rotating blades are installed on the connecting flange through a rotating shaft. The rotating blades are hinged together in turn through connecting rods.

9. The wind-gathering, speed-increasing and feedback 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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