CN205618310U - A diffuser for wind power generation - Google Patents

Abstract

The utility model discloses a diffusion cylinder applied to wind power generation, including the yaw rotating tube in pole setting and pole setting, the yaw rotating tube is connected with the diffusion cylinder body, wherein diffusion cylinder body is as the air intake towards yaw rotating tube one side opening, the other side opening of diffusion cylinder body is as the air outlet, diffusion cylinder body includes air inlet end, arc diffusion end and air outlet end in proper order, the diameter ratio of air intake is little than the diameter of air outlet, diffusion cylinder body embeds there is the wind wheel, diffusion cylinder body leans on air outlet one side to be provided with the tail vane; this diffuser structure leads to the wind power generation demand to the breeze environment, through reasonable configuration improvement, especially through diffuser body cooperation tailboard design behind the improvement, has solved the problem that current aerogenerator can't normally generate electricity in the area that wind-force is little, the wind speed is low, wind direction wind-force is unstable, can realize breeze electricity generation, and can automatic driftage to turn to in order to catch the wind direction.

Description

A diffuser for wind power generation

technical field

The utility model relates to the technical field of wind power generation, in particular to a diffuser cylinder applied to wind power generation.

Background technique

Wind power generation mainly converts wind energy into electrical energy through devices such as fans, where the fan mainly includes wind rotors, generators, towers and other components. Among them, the wind rotor is the most important part of the wind turbine, mainly composed of blades and hubs. Under the action of airflow, the blades can generate aerodynamic force to make the wind wheel rotate, and then increase the speed through the gearbox or directly drive the generator to generate electricity. Therefore, the wind capture efficiency of the blade directly affects the power generation efficiency of the fan. In recent years, the wind power industry has developed rapidly, but the environment that can provide excellent and stable wind energy is relatively lacking. This places higher requirements on the design of wind power blades, especially the wind capture efficiency of wind turbines.

Typically, when wind passes through a turbine, almost half of the air is forced to stay around the blades instead of passing through them, and the energy in that wind is lost. Conventional wind turbines can only harness up to 59.3 percent of the wind's energy, a value known as the Betz limit. At present, most of the technologies to improve the wind-catching efficiency focus on adopting a new airfoil with a higher lift-to-drag ratio, or adopting a full-airfoil structure from the blade tip to the blade heel, but the wind-catching efficiency is lower than the Betz limit of 0.593. A designer has designed a generator. For details, refer to the publication number CN 103925150A "A Universal Wind Gathering Floor Type Breeze Generator Based on the Venturi Effect". The wind collection unit composed of the inner wall, the outer wall and the partition between them, the wind acceleration unit composed of the wind transition pipe, the Venturi pipe and the diffuser pipe, etc., can realize the wind power in the area with small wind and low wind speed. Breeze generates electricity. However, in practice, it has been found that this structure does not improve the power generation efficiency enough to meet the demand, and this structure is not suitable for areas with unstable wind directions, which directly leads to the technology not being popularized and applied.

Contents of the invention

In order to overcome the deficiencies of the prior art, the utility model provides a venturi effect-based diffuser applied to wind power generation to realize breeze power generation.

The technical scheme that the utility model solves its technical problem adopts is:

A diffuser tube applied to wind power generation, comprising a vertical rod and a yaw rotating tube on the vertical rod, the yaw rotating tube is connected with a diffuser tube body, wherein the diffuser tube body faces the yaw rotary tube The side opening is used as an air inlet, and the other side opening of the diffuser body is used as an air outlet. The diffuser body includes an air inlet end, an arc-shaped diffuser end, and an air outlet in turn. The diameter of the air inlet is Smaller than the diameter of the air outlet, the diffuser body has a built-in wind wheel, and the side of the diffuser body near the air outlet is provided with a tail rudder plate.

As a preferred option, the arc-shaped diffuser end is an arc-shaped cylindrical wall with an arc-shaped section, wherein the arc-shaped diffuser end includes a front portion of the arc-shaped diffuser end and a rear portion of the arc-shaped diffuser end , wherein the diameter of the front part of the arc-shaped diffuser end decreases along the direction from the air inlet to the air outlet, the diameter of the rear part of the arc-shaped diffuser end expands along the direction from the air inlet to the air outlet, and the diameter of the air outlet The wall at the end is a trapezoidal cylinder.

As a preferred option, an annular transition end is provided between the arc-shaped diffuser end and the air outlet end.

As a preferred option, a connecting strip is provided on the outer wall of the diffuser cylinder body, and the diffuser cylinder body and the yaw rotation pipe are connected through a connecting strip.

As a preferred option, both ends of the connecting strip are connected with ring strips at the positions of the air inlet and the air outlet.

As a preferred option, the rudder plate is connected to the diffuser body through a connecting strip.

As a preferred option, the wind wheel is connected at the intersection position between the front part of the arc-shaped diffuser end and the rear part of the arc-shaped diffuser end through a bracket, wherein the front part of the arc-shaped diffuser end and the rear part of the arc-shaped diffuser end The junction between them is used as the throat of the diffuser cylinder.

As a preferred option, the angle θ between the wall of the air outlet end and the axis is 15°-30°.

The beneficial effect of the utility model is: the structure of the diffuser can meet the demand for wind power generation in the breeze environment and the defect of the poor efficiency of the wind power generator in the breeze environment, through reasonable structural improvement, especially through the improvement of the diffuser cylinder body and the tail The design of the rudder plate solves the problem that the existing wind turbines cannot generate electricity normally in areas with low wind force, low wind speed, and unstable wind direction. It can realize light wind power generation, and can automatically yaw and turn to capture the wind direction. , Mountains, farms, industrial areas and even personal gardens are applicable to a wide range of areas, and the equipment has a simple structure, low manufacturing cost and good use effect, which is conducive to the popularization and application of technology.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Fig. 1 is a perspective view of the utility model;

Fig. 2 is a sectional view of the utility model.

detailed description

In order to make the purpose, technical solution and advantages of the present application clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. In the ensuing description some specific details are referred to for a thorough understanding of the present invention. While the present invention may still be practiced without these specific details, the descriptions and representations herein are used by those skilled in the art to effectively convey the substance of their work to others skilled in the art. In addition, it should be noted that the terms "front side", "rear side", "left side", "right side", "upper side" and "lower side" used in the following description refer to directions in the drawings The words "inside" and "outside" respectively refer to directions toward or away from the geometric center of a specific component, and those skilled in the art who make simple and creative adjustments to the above directions should not be understood as technologies outside the scope of protection of this application. It should be understood that the specific embodiments described here are only used to explain the present application, and are not used to limit the actual protection scope. However, to avoid obscuring the purpose of the present invention, well-known techniques of manufacturing methods, control procedures, component dimensions, material compositions, circuit layouts, etc. are not described in detail since they are readily understood. Referring to Fig. 1 and Fig. 2, a diffuser cylinder applied to wind power generation includes a vertical pole 1 and a yaw rotating tube 2 on the vertical pole 1, the yaw rotating tube 2 is connected with a diffuser cylinder body 3, wherein The diffuser body 3 opens toward the yaw rotating tube 2 as an air inlet 31, and the other side of the diffuser body 3 opens as an air outlet 32, and the diffuser body 3 sequentially includes arc-shaped The diffuser end 5 and the air outlet end 6, the diameter of the air inlet 31 is smaller than the diameter of the air outlet 32, the diffuser body 3 has a built-in wind wheel 7, and the diffuser body 3 is close to the air outlet 32. A tail rudder plate 8 is provided on the side. That is, the wind wheel 7 , the diffuser body 3 , the tail rudder plate 8 , and the yaw rotating tube 2 rotate around the axis of the yaw rotating tube 2 as a whole.

The working principle of the diffuser body 3: the wind enters through the air inlet 31, accelerates through the arc-shaped diffuser end 5, and reaches the maximum wind speed at the position with the smallest diameter in the arc-shaped diffuser end 5, and blows the wind wheel 7 to convert the wind energy into electricity, to generate electricity. And the wind is blown out through the air outlet 6, and now the pressure on the outside of the diffuser cylinder body 3 is large, and the pressure on the inside of the diffuser cylinder body 3 near the air outlet 32 is small, so a pressure difference is formed, and this pressure difference can be greatly improved. The flow through the diffuser body 3 is increased to increase the wind speed, and according to the law of aerodynamics, if the wind speed is doubled, the efficiency of the wind wheel will be increased by eight times, thereby improving the efficiency of wind power generation.

In actual work, the wind wheel 7 rotates with the diffuser body 3 and the tail rudder plate 8. When the wind turns, for example, the wind direction blows from the left side of the diffuser body 3 to the right, the tail rudder plate 8, the diffuser The cylinder body 3 rotates to the right through the yaw rotating tube 2 until the tail rudder plate 8 rotates to be parallel to the new wind direction. At this time, the blades of the wind wheel 7 and the air inlet 31 of the diffuser cylinder body 3 are both facing the wind. Automatic capture of wind direction and improvement of wind flow passing through the wind wheel 7 are realized.

For other embodiments, refer to Fig. 1 and Fig. 2 for a diffuser cylinder applied to wind power generation, wherein the "embodiment" referred to here refers to specific features, structures or characteristic. "In an embodiment" appearing in different places in this specification does not all refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments. The embodiment includes a vertical pole 1 and a yaw rotating tube 2 on the vertical pole 1, the yaw rotating tube 2 is connected with a diffuser tube body 3, wherein the diffuser tube body 3 opens toward the side of the yaw rotary tube 2 As the air inlet 31 , the other side of the diffuser body 3 is opened as the air outlet 32 . In the embodiment in the figure, there is a gap 4 between the air inlet 31 and the yaw rotating tube 2 . The diffuser body 3 includes an arc-shaped diffuser end 5 and an air outlet end 6 in sequence, the diameter of the air inlet 31 is smaller than the diameter of the air outlet 32, and the diffuser body 3 has a built-in wind wheel 7 and Generator, the diffuser cylinder body 3 is provided with a tail rudder plate 8 on the side near the air outlet 32, and the arc-shaped diffuser end 5 is arc-shaped cylindrical with an arc-shaped cylinder wall section, wherein the arc-shaped diffuser The pressure end 5 includes an arc-shaped diffuser front portion 51 and an arc-shaped diffuser rear portion 52, wherein the diameter of the arc-shaped diffuser front portion 51 decreases along the direction from the air inlet to the air outlet, and the arc The diameter of the rear portion 52 of the shaped diffuser end expands along the direction from the air inlet to the air outlet, and the cylinder wall of the air outlet end 6 is in the shape of a trapezoidal cylinder. Due to 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 front part 51 of the arc-shaped diffuser end increases due to the smaller cross-sectional area; the rear part 52 of the arc-shaped diffuser end The internal cross-sectional area of the end and the end of the air outlet end 6 increases, and the wind speed is lower than that at the end of the front part 51 of the arc-shaped diffuser end, thereby forming a negative pressure effect, which is conducive to the accelerated flow of wind in the diffuser cylinder body 3 . It must be noted that the specific size ratio of the arc-shaped diffuser end 5 and the air outlet end 6, for example, the ratio of the length along the axial direction can be flexibly adjusted according to needs, and should not be limited to the ratio drawn in the figure. An annular transition end 61 is provided between the arc-shaped diffuser end 5 and the air outlet end 6, that is, when the air outside the diffuser cylinder body 3 flows along the vicinity of the outer wall of the diffuser cylinder body 3, it encounters an annular transition end 61. The transition end 61 will be blocked to form a vortex, and when the air inside the diffuser cylinder body 3 flows near the inner wall of the diffuser cylinder body 3, it will suddenly spread out to form a low pressure when it encounters the annular transition end 61, so that The pressure difference between the outside and inside of the wall of the diffuser cylinder body 3 at the position of the air outlet 32 can be further increased, thereby further increasing the air volume entering the diffuser cylinder body 3 . The wind wheel 7 is connected at the transition position between the front part 51 of the arc-shaped diffuser end and the rear part 52 of the arc-shaped diffuser end through the bracket 71, so as to maximize the use of the increase in air volume generated by the Venturi. Wherein, the junction position between the front part 51 of the arc-shaped diffuser end and the rear part 52 of the arc-shaped diffuser end serves as the throat of the diffuser cylinder, which is a key part for increasing the wind speed. The angle θ between the cylinder wall of the air outlet end 6 and the axis is 15°-30°.

In another embodiment, referring to Fig. 1 and Fig. 2, a diffuser cylinder applied to wind power generation includes a vertical pole 1 and a yaw rotating tube 2 on the vertical pole 1, and the yaw rotating tube 2 is connected with a diffuser The cylinder body 3, wherein the diffuser cylinder body 3 opens toward the yaw rotating tube 2 as an air inlet 31, and the other side of the diffuser cylinder body 3 opens as an air outlet 32, and the diffuser cylinder body 3 It includes an arc-shaped diffuser end 5 and an air outlet end 6 in turn. The diameter of the air inlet 31 is smaller than the diameter of the air outlet 32. The diffuser body 3 has a built-in wind wheel 7. The diffuser body 3 A tail rudder plate 8 is arranged on the side close to the air outlet 32, and a connecting strip 9 is arranged on the outer wall of the diffuser cylinder body 3, and the diffuser cylinder body 3 and the yaw rotating tube 2 are connected by the connecting strip 9, The design of the connecting strip 9 not only makes the connection of the diffuser cylinder body 3 more stable, but the connecting strip 9 itself also plays a role in reinforcing the diffuser cylinder body 3 and improves the strong wind resistance of the diffuser cylinder body 3 . The two ends of the connecting strip 9 are located at the air inlet 31 and the air outlet 32 and are connected with an annular strip 91. The annular strip 91 and the connecting strip 9 form a reinforced bracket for the diffuser body 3, which plays a role in the diffuser body 3. Very good protection and reinforcement, especially for the protection of the air inlet 31 and the air outlet 32. The tail rudder plate 8 is connected with the diffuser body 3 through a connecting strip 9, which facilitates the installation of the tail rudder plate 8. In this embodiment, the tail rudder plate 8 is located on the left and right sides of the diffuser body 3 .

According to the above principles, the utility model can also make appropriate changes and modifications to the above embodiments. Therefore, the utility model is not limited to the specific implementation manners disclosed and described above, and some modifications and changes to the utility model should also fall within the scope of protection of the claims of the utility model.

It has been proved by practice that the wind power generator using the diffuser can be scaled down or enlarged in proportion during manufacture, and it is suitable for a wide range of areas, opening up a new way for the application of wind energy in small wind areas. It has the advantages of simple equipment structure and low manufacturing cost. And the advantages of good use effect. And because the wind wheel 7 is installed inside the diffuser body 3, the damage to the birds caused by the wind wheel 7 can be avoided. The Venturi effect is manifested in the phenomenon that the flow velocity of the fluid increases when the restricted flow passes through the reduced flow section, and the flow velocity is inversely proportional to the flow section. According to Bernoulli's law, the increase of the flow velocity is accompanied by the decrease of the fluid pressure. , that is, a low pressure will be generated near the high-speed flowing fluid, resulting in adsorption. In actual work, the design of the tail rudder plate 8 in conjunction with the yaw rotating tube 2 enables the diffuser body 3 to follow the wind direction to yaw and steer. When the diffuser body 3 faces the wind direction, the air entering the diffuser body 3 sequentially passes through the narrowed arc-shaped diffuser front portion 51 and the expanded arc-shaped diffuser end rear portion 52, especially when passing through the arc-shaped In the throat between the front part 51 of the diffuser end and the rear part 52 of the arc-shaped diffuser end, the air pressure at the rear end of the diffuser cylinder is low, and the Venturi effect will appear, which will increase the velocity of the air flowing through the wind wheel 7 and make the The air pressure on the inner side of the air outlet 32 is reduced. At the same time, the air on the outside of the diffuser cylinder body 3 passes through the arc-shaped diffuser end front portion 51 that shrinks toward the center of the diffuser cylinder body 3, the arc-shaped diffuser end rear portion 52 that expands outward from the diffuser cylinder body 3, and acts as a protrusion. When the annular transition end 61 and the air outlet end 6 of the transition part are connected, the air pressure on the outside of the air outlet 32 is increased. The air pressure difference formed on the inner side and the outer side of the air outlet 32 further increases the air velocity flowing through the wind wheel 7, so that the efficiency of the wind power engine is greatly improved. Even if the swept area of the wind wheel only increases by a small percentage, it can be greatly improved. Power generation efficiency, for example, if the wind speed is doubled, the conversion efficiency of the wind wheel can be increased by eight times. The diffuser is mainly suitable for downwind wind turbines.

Claims (8)

1. the diffusion cylinder being applied to wind-power electricity generation, it is characterized in that: include the driftage roll tube (2) in vertical rod (1) and vertical rod (1), described driftage roll tube (2) connects diffusion cylinder body (3), wherein said diffusion cylinder body (3) towards driftage roll tube (2) side opening as air inlet (31), the opposite side opening of described diffusion cylinder body (3) is as air outlet (32), described diffusion cylinder body (3) includes arc diffusion end (5) and outlet air end (6) successively, the diameter of described air inlet (31) is less than the diameter of air outlet (32), described diffusion cylinder body (3) is built-in with wind wheel (7), described diffusion cylinder body (3) is provided with tail plate (8) by air outlet (32) side.

A kind of diffusion cylinder being applied to wind-power electricity generation the most according to claim 1, it is characterized in that: described arc diffusion end (5) be barrel cross section be the arc tubular of arc, wherein said arc diffusion end (5) includes arc diffusion end anterior (51) and arc diffusion end rear portion (52), wherein said arc diffusion end anterior a diameter of of (51) reduce along air inlet to air outlet direction, the a diameter of of described arc diffusion end rear portion (52) expands along air inlet to air outlet direction, and the barrel of described outlet air end (6) is trapezoidal cylinder shape.

A kind of diffusion cylinder being applied to wind-power electricity generation the most according to claim 1 and 2, it is characterised in that: it is provided with annular-like transition end (61) between described arc diffusion end (5) and outlet air end (6).

A kind of diffusion cylinder being applied to wind-power electricity generation the most according to claim 1, it is characterized in that: be provided with connection strap (9) at the outer wall of described diffusion cylinder body (3), connected by connection strap (9) between described diffusion cylinder body (3) and driftage roll tube (2).

A kind of diffusion cylinder being applied to wind-power electricity generation the most according to claim 4, it is characterised in that: described connection strap (9) two ends are positioned at air inlet (31), the connection of air outlet (32) position has annular bar (91).

A kind of diffusion cylinder being applied to wind-power electricity generation the most according to claim 4, it is characterised in that: it is connected by connection strap (9) between described tail plate (8) with diffusion cylinder body (3).

A kind of diffusion cylinder being applied to wind-power electricity generation the most according to claim 2, it is characterised in that: described wind wheel (7) is connected between arc diffusion end anterior (51) and arc diffusion end rear portion (52) at delivery position by support (71).

A kind of diffusion cylinder being applied to wind-power electricity generation the most according to claim 2, it is characterised in that: between barrel and the axis of described outlet air end (6), angle, θ is 15 °～30 °.