Wind power generation device utilizing Venturi effect

Abstract

The invention discloses a wind power generation device using a Venturi effect, and the device comprises a wind power capturing unit which comprises an arc-shaped structural member; the wind power speed increasing unit comprises a wind power collecting pipe and a Venturi pipe, the wind power collecting pipe is connected between the arc-shaped structural part and the Venturi pipe, and the cross section of the wind power collecting pipe is gradually reduced in the direction from the wind power collecting pipe to the Venturi pipe; wherein the venturi tube has a throat cross section limit value. The wind power generation device utilizing the Venturi effect is provided. In the wind power generation device, the Venturi tube utilizes the fluid property that the flow speed is inversely proportional to the sectional area when fluid with the same flow passes through different sections in a normal state, and the wind speed at the tail end of the Venturi tube is multiplied due to the fact that the sectional area is reduced, so that the wind power generation device can achieve efficient wind energy capture under the low-wind-speed condition; therefore, the wind speed is multiplied, and the overall wind energy conversion efficiency is greatly improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of energy sources using the Venturi effect, and in particular relates to a wind power generation device using the Venturi effect. Background Art

[0002] At present, the utilization rate of wind power generation resources with low wind speeds of level 2 to 4 is extremely low, but the wind resources with low wind speeds are very abundant; 2. The wind power generation equipment currently on the market has a very low utilization rate of wind energy resources, and only utilizes the cross-sectional area that can be contacted by its own fan blades, and the rest is diffused in nature. Traditional horizontal axis or vertical axis wind turbines have limitations, such as high dependence on wind speed, requiring a higher starting wind speed, and low power generation efficiency in low wind speed areas; low wind energy utilization rate, and limited wind energy capture efficiency of blade design; bulky structure, large blades and towers lead to high installation and maintenance costs, and are difficult to miniaturize for application; poor wind direction adaptability, fixed wind turbines cannot track wind direction changes in real time, resulting in energy loss; to improve power generation efficiency at low wind speeds, there is a wind gathering hood design in the existing technology, which gathers wind force through a trumpet-shaped structure, but the speed increase effect is limited; there is also a Venturi tube application in the existing technology, which uses fluid mechanics principles to accelerate wind speed, but there are the following problems: unreasonable throat design, poor matching of the cross-sectional contraction ratio and length, resulting in airflow separation and energy loss; insufficient structural strength, and high-speed wind pressure can easily cause pipe deformation or rupture; lack of wind direction adaptability, the fixed Venturi tube cannot adjust with the wind direction, reducing the actual wind capture efficiency. Summary of the Invention

[0003] To solve the above problems, the primary purpose of the present invention is to provide a wind power generation device using the Venturi effect to solve the technical problem of low wind resource utilization rate of existing wind turbines in areas with low wind force and low wind speed.

[0004] To achieve the above object, the technical solution of the present invention is as follows:

[0005] The present invention provides a wind power generation device utilizing the Venturi effect, comprising:

[0006] A wind capture unit including an arc-shaped structural member;

[0007] a wind speed increasing unit comprising a wind collecting tube and a venturi tube, wherein the wind collecting tube is connected between the arc-shaped structural member and the venturi tube, and a cross section of the wind collecting tube gradually decreases from the direction of the wind collecting tube toward the venturi tube;

[0008] Wherein, the Venturi tube has a throat cross-section limit value.

[0009] The wind power generation device utilizing the Venturi effect is designed with a wind capture unit and a wind speed increasing unit. The wind capture unit includes an arc-shaped structural member, and the wind speed increasing unit includes a wind collection tube and a Venturi tube. The cross-section of the wind collection tube gradually decreases from the direction of the wind collection tube to the direction of the Venturi tube. The Venturi tube has a throat cross-section limit value. By utilizing the fluid property that the flow velocity is inversely proportional to the cross-sectional area when the same flow rate of fluid passes through different cross-sections under normal conditions, the wind speed at the end of the Venturi tube increases exponentially due to the decrease in cross-sectional area, so that the wind power generation device can achieve efficient wind energy capture under low wind speed conditions. Compared with the traditional wind turbine, the starting wind speed is greatly reduced. The wind speed is increased exponentially through the throat structure design of the Venturi tube, and the overall wind energy conversion efficiency is greatly improved.

[0010] Furthermore, the throat cross-section limit value ranges from 0.05m2 to 0.28m2.

[0011] By designing the parameter range of the throat cross-section limit value, we can avoid airflow obstruction caused by a throat cross-section that is too small, and also prevent the loss of the speed increase effect caused by a throat cross-section that is too large.

[0012] Furthermore, the ratio of the diameter of the venturi tube to the length of the venturi tube ranges from 0.15 to 0.6.

[0013] By designing a parameter interval of the ratio of the diameter of the venturi tube to the length of the venturi tube, optimal fluid continuity is achieved and boundary layer separation is reduced.

[0014] Furthermore, the wind collection tube includes a first shrinkage tube, a bend and a second shrinkage tube connected in sequence, the first shrinkage tube is connected to the arc-shaped structural member, and the second shrinkage tube is connected to the Venturi tube.

[0015] By designing the wind collection tube as a first contraction tube, a bend and a second contraction tube connected in sequence, graded acceleration can reduce energy loss, and the bend design improves airflow uniformity.

[0016] Furthermore, the cross-section of the first shrink tube ranges from 0.8m2 to 2.5m2;

[0017] And / or, the cross-section of the second shrink tube ranges from 0.5 m2 to 1.2 m2.

[0018] By designing the cross-sectional parameters of the first contraction tube and the second contraction tube, a smooth transition of the wind collection tube is achieved, thereby avoiding the generation of local eddies.

[0019] Furthermore, the arc-shaped structural member includes:

[0020] The arc surface is provided on the inner circumferential surface of the arc structure. From the arc structure toward the wind collection pipe, the arc surface encloses and forms a tubular structure, and the cross-sectional size of the arc surface gradually decreases.

[0021] By designing the cross-sectional size of the curved surface to gradually decrease, the initial wind collection efficiency is improved and the wind intensity at the device inlet is reduced.

[0022] Furthermore, the wind capture unit further comprises:

[0023] The protective layer is arranged on the outer peripheral surface of the arc-shaped structural member.

[0024] By arranging a protective layer on the outer peripheral surface of the arc-shaped structural member, anti-rust and waterproof functions can be achieved and the corrosion resistance life can be increased. By arranging multiple square tubes outside the protective layer, the reinforcement function of the wind power generation device can be increased.

[0025] Furthermore, it also includes:

[0026] Diffusion unit, including:

[0027] a first diffusion pipe connected to an end of the venturi pipe away from the wind collection pipe;

[0028] The second diffuser is connected to the end of the first diffuser away from the venturi tube; wherein,

[0029] The cross section of the second diffusion pipe is larger than the cross section of the first diffusion pipe.

[0030] Furthermore, the diffusion angle of the first diffusion tube ranges from 8° to 12°;

[0031] And / or, the diffusion angle of the second diffusion pipe ranges from 12° to 18°.

[0032] By designing the diffusion angle range of the first diffusion pipe to be 8° to 12° and the diffusion angle range of the second diffusion pipe to be 12° to 18°, the outlet wind speed can be reduced to 4m / s to 5m / s.

[0033] Furthermore, it also includes:

[0034] Wind direction tracking unit, including:

[0035] A wind direction detector, an electric rotating disk and a host, wherein the wind direction detector is used to obtain azimuth data, and the host is used to obtain the azimuth data and send instructions to rotate the electric rotating disk.

[0036] By adding a wind direction tracking unit design, the wind capture efficiency of the wind power generation device using the Venturi effect is improved and the ability to resist sudden wind changes is enhanced.

[0037] Compared with the prior art, the beneficial effects of the present application are as follows: a wind power generation device utilizing the Venturi effect includes: a wind capture unit, including an arc-shaped structural member; a wind speed increasing unit, including a wind collection tube and a Venturi tube, the wind collection tube is connected between the arc-shaped structural member and the Venturi tube, and the cross-section of the wind collection tube gradually decreases from the direction of the wind collection tube to the direction of the Venturi tube; wherein, the Venturi tube has a throat cross-section limit value.

[0038] The wind power generation device utilizing the Venturi effect is designed with a wind capture unit and a wind speed increasing unit. The wind capture unit includes an arc-shaped structural member, and the wind speed increasing unit includes a wind collection tube and a Venturi tube. The cross-section of the wind collection tube gradually decreases from the direction of the wind collection tube to the direction of the Venturi tube. The Venturi tube has a throat cross-section limit value. By utilizing the fluid property that the flow velocity is inversely proportional to the cross-sectional area when the same flow rate of fluid passes through different cross-sections under normal conditions, the wind speed at the end of the Venturi tube increases exponentially due to the decrease in cross-sectional area, so that the wind power generation device can achieve efficient wind energy capture under low wind speed conditions. Compared with the traditional wind turbine, the starting wind speed is greatly reduced. The wind speed is increased exponentially through the throat structure design of the Venturi tube, and the overall wind energy conversion efficiency is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a schematic diagram of the overall structure of a wind power generation device utilizing the Venturi effect of the present invention.

[0040] Figure 2 It is a detailed structural diagram of a wind power generation device utilizing the Venturi effect of the present invention.

[0041] Figure 3 It is a three-dimensional schematic diagram of a wind power generation device utilizing the Venturi effect according to the present invention.

[0042] In the figure: 10, wind capture unit; 11, arc-shaped structural member; 111, arc-shaped surface; 112, protective layer; 113, first bracket; 20, wind speed increasing unit; 21, wind collection tube; 211, first contraction tube; 212, bend; 213, second contraction tube; 214, second bracket; 22, venturi tube; 221, first tube body; 222, second tube body; 223, third tube body; 224, fourth tube body; 225, third bracket; 30, diffusion unit; 31, first diffusion tube; 32, second diffusion tube. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0044] To achieve the above object, the technical solution of the present invention is as follows:

[0045] See also Figure 1-Figure 3 As shown, the present invention provides a wind power generation device using the Venturi effect, including: a wind capture unit 10, including an arc-shaped structural member 11; a wind speed increasing unit 20, including a wind collection tube 21 and a Venturi tube 22, the wind collection tube 21 is connected between the arc-shaped structural member 11 and the Venturi tube 22, and the cross-section of the wind collection tube 21 gradually decreases from the wind collection tube 21 to the direction of the Venturi tube 22; wherein the Venturi tube 22 has a throat cross-section limit value.

[0046] The present application proposes a wind power generation device utilizing the Venturi effect. Through the design of a wind capture unit 10 and a wind speed increasing unit 20, the wind capture unit 10 includes an arc-shaped structural member 11, and the wind speed increasing unit 20 includes a wind collection tube 21 and a venturi tube 22. The cross-section of the wind collection tube 21 gradually decreases in the direction from the wind collection tube 21 to the venturi tube 22. The venturi tube 22 has a throat cross-section limit value. By utilizing the fluid property that the flow velocity is inversely proportional to the cross-sectional area when the fluid with the same flow rate passes through different cross-sections under normal conditions, the wind speed at the end of the venturi tube 22 increases exponentially due to the decrease in cross-sectional area, so that the wind power generation device can achieve efficient wind energy capture under low wind speed conditions. Compared with the traditional wind turbine, the starting wind speed is greatly reduced. Through the throat structure design of the venturi tube 22, the wind speed is increased exponentially, and the overall wind energy conversion efficiency is greatly improved.

[0047] The wind power generation device is connected by a wind collection pipe 21 and a venturi tube 22 to realize a two-stage step-by-step speed increase design. At the same time, through the design of the limit value of the throat cross-section of the venturi tube, a breakthrough in low wind speed power generation performance is achieved while maintaining a compact structure. It is particularly suitable for promotion and application in areas with an annual average wind speed of less than 5m / s.

[0048] Furthermore, the throat cross-section limit value ranges from 0.05m2 to 0.28m2.

[0049] By designing the parameter range of the throat cross-section limit value, we can avoid airflow obstruction caused by a throat cross-section that is too small, and also prevent the loss of the speed increase effect caused by a throat cross-section that is too large.

[0050] Furthermore, the ratio of the diameter of the venturi tube 22 to the length of the venturi tube 22 is in the range of 0.15 to 0.6.

[0051] By designing a parameter interval of the ratio of the diameter of the venturi tube 22 to the length of the venturi tube 22 , optimal fluid continuity is achieved and boundary layer separation is reduced.

[0052] It should be noted that the wind collection tube 21 is used to achieve a first-stage speed increase, and the venturi tube 22 is used to achieve a second-stage speed increase.

[0053] In a preferred embodiment, the end of wind collection tube 21 closest to arcuate structure 11 serves as an inlet. Its diameter ranges from 1.2m to 2.0m. The wind collection tube 21 has a contraction ratio of 1.5:1 to 3:1, a contraction angle of 25° to 45°, and a length of 1.2m to 2.5m. The dimensional parameters of wind collection tube 21 are designed to achieve a multiple-fold wind speed gain.

[0054] In a preferred embodiment, the throat diameter of the venturi tube 22 ranges from 0.3m to 0.5m, the angle of the contraction section ranges from 8° to 12°, the angle of the divergence section ranges from 10° to 15°, and the ratio of the diameter of the venturi tube 22 to the length of the venturi tube 22 ranges from 0.15 to 0.6, and the ratio of the diameter of the venturi tube 22 to the length of the venturi tube 22 is further preferably in the range of 2.5 to 4.

[0055] Furthermore, the wind collection tube 21 includes a first shrinkable tube 211, a bend 212, and a second shrinkable tube 213 connected in sequence. The first shrinkable tube 211 is connected to the venturi tube 22, and the second shrinkable tube 213 is connected to the venturi tube 22. The wind collection tube 21 also includes a second bracket 214 connected to the first shrinkable tube 211 and used to support the first shrinkable tube 211.

[0056] By designing the wind collection tube to be a first contraction tube 211, a bend 212 and a second contraction tube 213 connected in sequence, graded acceleration can reduce energy loss, and the bend design improves airflow uniformity.

[0057] Furthermore, the cross-section of the first shrinkable tube 211 ranges from 0.8 m 2 to 2.5 m 2 ; and / or the cross-section of the second shrinkable tube 213 ranges from 0.5 m 2 to 1.2 m 2 .

[0058] By designing the cross-sectional parameters of the first contraction tube 211 and the second contraction tube 213 , a smooth transition of the wind collection tube is achieved, thereby avoiding the generation of local eddies.

[0059] Furthermore, the curved structural member 11 includes a curved surface 111 disposed on its inner circumference. The curved surface 111 forms a tubular structure with a gradually decreasing cross-sectional dimension from the curved structural member 11 toward the wind collection tube 21. The curved surface 111 is specifically flared and smooth. This flared shape improves initial wind collection efficiency and reduces wind intensity at the device's inlet.

[0060] Furthermore, the wind capture unit 10 also includes: a protective layer 112, disposed on the outer circumferential surface of the arc-shaped structural member 111; a first bracket 113, comprising a plurality of square tubes, disposed outside the arc-shaped structural member 11 and connected to the protective layer 112. The protective layer 112 is preferably a film layer made of a rust-proof and waterproof metal material. By disposing the protective layer 112 on the outer circumferential surface of the arc-shaped structural member 111, it can achieve rust-proof and waterproof functions and increase the corrosion resistance life. The square tubes are fixedly connected to the arc-shaped structural member 11, and the plurality of square tubes are used to support and reinforce the arc-shaped structural member 11. By disposing the plurality of square tubes outside the protective layer 112, the wind turbine generator device can be reinforced.

[0061] Furthermore, a wind power generation device utilizing the Venturi effect also includes: a diffusion unit 30, including: a first diffusion tube 31, connected to the end of the Venturi tube 22 away from the wind collection tube 21; a second diffusion tube 32, connected to the end of the first diffusion tube 31 away from the Venturi tube 22; wherein the cross-section of the second diffusion tube 32 is larger than the cross-section of the first diffusion tube 31.

[0062] Furthermore, the diffusion angle of the first diffusion pipe 31 ranges from 8° to 12°; and / or the diffusion angle of the second diffusion pipe 32 ranges from 12° to 18°.

[0063] The first diffuser 31 is arranged at the end of the venturi tube 22 away from the wind collection tube 21, and the second diffuser 32 is arranged at the end of the first diffuser 31 away from the venturi tube 22. The diffusion angle range of the first diffuser 31 is designed to be 8° to 12°, and the diffusion angle range of the second diffuser 32 is designed to be 12° to 18°, so as to reduce the outlet wind speed to 4m / s to 5m / s.

[0064] It should be added that the first diffuser 31, the second diffuser 32, the venturi tube 22, the arc structure 11, the first contraction tube 211, the bend 212 and the second contraction tube 213 of the wind power generation device are all stainless steel tubular structures.

[0065] Furthermore, in some preferred embodiments, the venturi tube 22 further includes: a first tube body 221, a second tube body 222, a third tube body 223, and a fourth tube body 224, which are connected in sequence. The first tube body 221 is connected to the wind collection pipe 21, the fourth tube body 224 is connected to the first diffuser 31, the second tube body 222 has a larger cross-section than the first tube body 221 and the fourth tube body 224, and the third tube body 223 has a larger cross-section than the first tube body 221 and the fourth tube body 224. The venturi tube 22 further includes a third bracket 225, which is connected to and supports the first tube body 221 and the fourth tube body 224, respectively.

[0066] Furthermore, a wind power generation device utilizing the Venturi effect also includes: a wind direction tracking unit, including: a wind direction detector, an electric rotating disk and a host, the wind direction detector is used to obtain azimuth data, and the host is used to obtain azimuth data and send instructions to rotate the electric rotating disk.

[0067] It should be noted that the wind direction detector is an 8-position mechanical measuring instrument used to collect azimuth data of wind direction. The mechanical wind speed trigger threshold of the wind direction detector is ≥1.5m / s. For example, the wind direction at a wind speed of 3m / s can trigger the wind direction detector to collect azimuth data of wind direction. A wind speed of 3m / s belongs to a low wind speed environment. The wind power generation device utilizing the Venturi effect in this application is suitable for use in a low wind speed environment. The interior of the electric rotating disk is hollow, and the motor is arranged on the outside of the electric rotating disk. The outside of the electric rotating disk is provided with a stainless steel shell to wrap the motor and the electric rotating disk. The host is used to obtain the azimuth data of the wind direction detector and send instructions to the electric rotating disk to drive the electric rotating disk to rotate. By adding the design of the wind direction tracking unit, the wind capture efficiency of the wind power generation device utilizing the Venturi effect is improved, and the ability to resist sudden wind changes is enhanced.

[0068] The present invention proposes a wind power generation device utilizing the Venturi effect, comprising: a wind capture unit 10, including an arc-shaped structural member 11; a wind speed increasing unit 20, including a wind collection tube 21 and a Venturi tube 22, wherein the wind collection tube 21 is connected between the arc-shaped structural member 11 and the Venturi tube 22, and the cross-section of the wind collection tube 21 gradually decreases from the direction of the wind collection tube 21 to the direction of the Venturi tube 22; wherein the Venturi tube 22 has a throat cross-section limit value.

[0069] The wind power generation device utilizing the Venturi effect is designed with a wind capture unit 10 and a wind speed increasing unit 20. The wind capture unit 10 includes an arc-shaped structural member 11, and the wind speed increasing unit 20 includes a wind collection tube 21 and a venturi tube 22. The cross-section of the wind collection tube 21 gradually decreases in the direction from the wind collection tube 21 to the venturi tube 22. The venturi tube 22 has a throat cross-section limit value. By utilizing the fluid property that the flow velocity is inversely proportional to the cross-sectional area when the same flow rate of fluid passes through different cross-sections under normal conditions, the wind speed at the end of the venturi tube 22 increases exponentially due to the decrease in cross-sectional area, so that the wind power generation device can achieve high-efficiency wind energy capture under low wind speed conditions of 3m / s to 5m / s. Compared with the traditional wind turbine starting wind speed, it is greatly reduced. The throat structure design of the venturi tube 22 increases the wind speed by several times, and the overall wind energy conversion efficiency is greatly improved.

[0070] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A wind power generation device utilizing the Venturi effect, characterized in that: include: A wind capture unit including an arc-shaped structural member; a wind speed increasing unit comprising a wind collecting tube and a venturi tube, wherein the wind collecting tube is connected between the arc-shaped structural member and the venturi tube, and a cross section of the wind collecting tube gradually decreases from the direction of the wind collecting tube toward the venturi tube; Wherein, the Venturi tube has a throat cross-section limit value.

2. A wind power generation device utilizing the Venturi effect according to claim 1, characterized in that: The throat cross-section limit value ranges from 0.05m2 to 0.28m2.

3. The wind power generation device using the Venturi effect according to claim 1, characterized in that: The ratio of the diameter of the venturi tube to the length of the venturi tube is in the range of 0.15 to 0.

6.

4. The wind power generation device using the Venturi effect according to claim 1, characterized in that: The wind collection tube includes a first shrinkage tube, a bend and a second shrinkage tube connected in sequence, the first shrinkage tube is connected to the arc-shaped structural member, and the second shrinkage tube is connected to the Venturi tube.

5. The wind power generation device using the Venturi effect according to claim 4, characterized in that: The cross-section of the first shrink tube ranges from 0.8m2 to 2.5m2; And / or, the cross-section of the second shrink tube ranges from 0.5 m2 to 1.2 m2.

6. The wind power generation device using the Venturi effect according to claim 1, characterized in that: The arc-shaped structural member comprises: The arc surface is provided on the inner circumferential surface of the arc structure. From the arc structure toward the wind collection pipe, the arc surface encloses and forms a tubular structure, and the cross-sectional size of the arc surface gradually decreases.

7. The wind power generation device using the Venturi effect according to claim 1, characterized in that: The wind capture unit further includes a protective layer provided on the outer peripheral surface of the arc-shaped structural member.

8. The wind power generation device using the Venturi effect according to claim 1, characterized in that: Also includes: Diffusion unit, including: a first diffusion pipe connected to an end of the venturi pipe away from the wind collection pipe; The second diffuser is connected to an end of the first diffuser away from the venturi tube; wherein the cross section of the second diffuser is larger than the cross section of the first diffuser.

9. The wind power generation device using the Venturi effect according to claim 8, characterized in that: The diffusion angle of the first diffusion tube ranges from 8° to 12°; and / or the diffusion angle of the second diffusion tube ranges from 12° to 18°.

10. The wind power generation device using the Venturi effect according to claim 1, characterized in that: Also includes: Wind direction tracking unit, including: A wind direction detector, an electric rotating disk and a host, wherein the wind direction detector is used to obtain azimuth data, and the host is used to obtain the azimuth data and send instructions to rotate the electric rotating disk.

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