A wind-driven ducted fan wind power generation device

Abstract

The present application relates to a kind of wind-driven ducted fan wind turbine, including coaxial outer impeller and inner impeller, the outer impeller wraps inner impeller, the outer impeller is equipped with more than 1 outer spiral blade, the inner impeller is equipped with more than 1 inner spiral blade, the rotating direction of the outer spiral blade and inner spiral blade is opposite;For transmitting the rotating force of outer impeller, outer impeller shaft connects outer impeller generator, for transmitting the rotating force of inner impeller, inner impeller shaft connects inner impeller generator.The wind-driven ducted fan wind turbine of the present application adopts double-impeller reverse rotation structure, wherein inner and outer impeller rotation will produce double-flow effect according to the characteristics of ducted wind flow, so that the inner impeller is accelerated to rotate, and the acceleration ratio even exceeds 6 times the speed, the power generation efficiency is greatly increased, and the bidirectional engine can realize the power generation structure demand of outer impeller wrapping inner impeller, realize double-impeller synchronous power generation and do not interfere with each other, to save space ratio while improving efficiency.

Description

Technical Field

[0001] This invention relates to the field of wind power generation technology, and more specifically to a wind-driven ducted blade wind power generation device. Background Technology

[0002] As a core component for energy capture, the design and performance of wind turbine blades directly affect power generation efficiency and system reliability. While modern blade technology has achieved significant breakthroughs, it still faces multiple challenges, including environmental adaptability and structural stability. However, the working efficiency of existing wind turbine blades exhibits significant differences along the radial direction, with the energy capture efficiency in the outer region being far higher than that in the inner region. This phenomenon stems from the combined effects of aerodynamic principles and mechanical structure. For example, the outer section of the blade has a higher linear velocity, resulting in a larger volume of air swept per unit time. According to the momentum-blade element theory, the aerodynamic torque... ( air density, The lift coefficient, The chord length increases quadratically with the radius, thus requiring a wind power generation structure that can improve internal workmanship. Summary of the Invention

[0003] This invention provides a wind-driven ducted blade wind power generation device to solve the problem of low power generation efficiency in the prior art due to the much higher energy capture efficiency of the external area compared to the internal area.

[0004] To achieve the above objectives, the embodiments of the present invention provide the following technical solutions:

[0005] A wind-driven ducted fan wind power generation device includes a coaxial outer impeller and an inner impeller, the outer impeller enclosing the inner impeller, the outer impeller having more than one outer helical blade, and the inner impeller having more than one inner helical blade, the outer helical blade and the inner helical blade rotating in opposite directions; the outer impeller shaft for transmitting the rotational force of the outer impeller is connected to an outer impeller generator, and the inner impeller shaft for transmitting the rotational force of the inner impeller is connected to an inner impeller generator.

[0006] Furthermore, the distance between the outer helical blade and the inner helical blade is not less than 2 mm.

[0007] Furthermore, the outlet diameter of the outer impeller is wider than its inlet diameter.

[0008] Furthermore, the outlet diameter of the inner impeller is narrower than its inlet diameter.

[0009] Furthermore, both the outer impeller and the inner impeller have at least three blades.

[0010] Further, the outer impeller shaft sleeve is arranged outside the inner impeller shaft, and a rotating connecting device is arranged between the two.

[0011] Further, the outer impeller generator is provided with a wind guide cavity outside the inner impeller generator, and the air inlet of the wind guide cavity corresponds to the air outlet of the outer impeller.

[0012] Further, the air outlet of the wind guide cavity is provided with a backflow cover, and the air outlet of the wind guide cavity enters the inner impeller generator or the outer impeller generator through the backflow cover.

[0013] Further, the outer impeller is provided with a flow straightener at the center of the air inlet side.

[0014] Further, the outer side of the outer impeller is provided with a fish fin support that can rotate with the wind, so that the air inlet side of the outer impeller faces the direction of the maximum wind power.

[0015] The embodiment of the present application has the following advantages:

[0016] The wind-driven ducted fan wind power generation device of the present application adopts an inner-outer double impeller reverse rotation structure, and the inner-outer impeller rotation produces a double flow effect according to the characteristics of the duct wind flow. The vortex generated after the airflow of the outer impeller blade produces a reverse power to the inner impeller, so as to accelerate the rotation of the inner impeller. After the airflow is adjusted to the best state, the speed is doubled, and the acceleration rate even exceeds 6 times the speed. The power generation efficiency is greatly increased.

[0017] The wind-driven ducted fan wind power generation device of the present application designs a bidirectional generator, i.e. a coaxial forward and reverse rotation generator, which can realize the power generation structure requirement of the outer impeller wrapping the inner impeller, realize synchronous power generation of the double impellers and do not interfere with each other, thereby saving space ratio while improving efficiency, greatly improving power generation efficiency, and having small land occupation and convenient transfer.

[0018] The flow straightener of the wind-driven ducted fan wind power generation device of the present application is conical, which can standardize the airflow linear effective utilization of wind energy. In combination with the rotatable fish fin support, the whole forms a device that can actively seek the optimal wind direction, has an active wind direction pointing function and a tornado backflow characteristic.

[0019] The wind-driven ducted fan wind power generation device of the present application pastes a solar thin film battery on the surface of the outer impeller, which can assist the rotation of the impeller in the windless state, and can start rotation in the slight wind. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only exemplary, and for those skilled in the art, other drawings can be obtained from the provided drawings without creative labor.

[0021] The structures, proportions, sizes, etc. shown in the specification are only used to cooperate with the content disclosed in the specification, to be understood and read by those skilled in the art, and are not used to limit the conditions that the present application can be implemented, so they do not have technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effects that the present application can produce and the purposes that the present application can achieve, should still fall within the scope of the technical content disclosed by the present application.

[0022] Figure 1 An internal structure diagram of a wind-driven ducted fan wind power generation device provided by the present application;

[0023] Figure 2 A structure diagram of an outer impeller in a wind-driven ducted fan wind power generation device provided by the present application;

[0024] Figure 3 A structure diagram of an inner impeller in a wind-driven ducted fan wind power generation device provided by the present application;

[0025] Figure 4 An internal structure diagram of a wind-driven ducted fan wind power generation device provided by the present application;

[0026] Figure 5 An internal structure diagram of a bidirectional generator in a wind-driven ducted fan wind power generation device provided by the present application.

[0027] In the drawings:

[0028] 1, outer impeller; 2, inner impeller; 3, outer spiral blade; 4, inner spiral blade; 5, outer impeller shaft; 6, impeller shell; 7, inner impeller shaft; 8, outer impeller generator; 9, inner impeller generator; 10, rotor; 11, stator; 12, wind guide cavity; 13, backflow cover; 14, fin support; 15, base; 16, fairing; 17, rotary connection device; 18, containing cavity. DETAILED DESCRIPTION

[0029] The following specific embodiments illustrate the implementation of the present application, and those skilled in the art can easily understand other advantages and effects of the present application from the disclosure of the specification. Obviously, the described embodiments are part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0030] As shown in Figure 1 A wind-driven ducted fan wind power generation device, comprising coaxial outer impeller 1 and inner impeller 2, the outer impeller 1 wraps the inner impeller 2, the outer impeller 1 is provided with more than 1 outer spiral blade 3, the inner impeller 2 is provided with more than 1 inner spiral blade 4, the rotation direction of the outer spiral blade 3 and the inner spiral blade 4 is opposite. In this technology, the rotation of the inner impeller 2 and the outer impeller 1 will produce double-flow effect according to the characteristics of the ducted wind flow, so that the inner impeller 2 rotates at an accelerated speed, and the rotation speed of the inner impeller 2 is even more than 6 times. Compared with the existing wind turbine blades, the present technology greatly improves the wind sweeping efficiency of the internal region of the blade, and the internal region of the blade is much larger than the wind sweeping efficiency of the external region. The inner impeller 2 and the outer impeller 1 generate electricity at the same time, which greatly increases the power generation efficiency.

[0031] In this technology, the distance between the outer spiral blade 3 and the inner spiral blade 4 is not less than 2mm.

[0032] As shown in Figure 2 The outer impeller 1 has a wider diameter on the outflow side than on the inflow side, and the outer impeller 1 includes outer spiral blades 3, an outer impeller shaft 5, and an impeller shell 6. The outer spiral blades 3 are fixedly arranged inside the outer impeller 1 shell, and the outer impeller 1 blade or the center of the outer impeller 1 shell is fixedly connected with the outer impeller shaft 5. Preferably, the impeller shell 6 is a tapered barrel structure with a narrow inflow side and a wide outflow side. On the one hand, it can make the outer impeller 1 have good wind direction following characteristics; on the other hand, it can make the inner part of the outer impeller 1 have a tornado characteristic, that is, a central cold wind, which can intensify the rotation power of the inner impeller 2 and have a cold fusion effect; thirdly, this structure can prevent strong wind from impacting and damaging the fan blades, and effectively pass the wind flow through the inner part of the outer impeller 1 as soon as possible.

[0033] As shown in Figure 3As shown, the outflow side diameter of the inner impeller 2 is narrower than the inflow side diameter, the inner impeller shaft 7 is arranged at the center of the inner spiral blade 4 of the inner impeller 2, and the outer contour formed after the rotation of the inner spiral blade 4 is preferably a tapered barrel structure with a narrow inflow side and a wide outflow side. Moreover, the width of the inner spiral blade 4 from the inflow side to the outflow side is constant, but the inner impeller shaft 7 is a tapered shaft with gradually decreasing width from the inflow side to the outflow side. This structure is to remove the diameter obstruction of the motor and increase the cyclone effect at the tail end of the large impeller, so that the center of the backflow cold air flows in the opposite direction to accelerate, thereby improving the tornado effect in the area of the inner impeller 2.

[0034] The number of fan blades of the outer impeller 1 and the inner impeller 2 is not less than 3, and preferably the number of the outer impeller 1 is 1-2 more than that of the inner impeller 2, which can enhance the power of the vortex formed by the outer impeller 1 to the inner impeller 2.

[0035] In order to realize simultaneous power generation of the outer impeller 1 and the inner impeller 2, two generators, the inner impeller generator 9 and the outer impeller generator 8, can be arranged, the inner impeller generator 9 is connected to the inner impeller shaft 7, the outer impeller generator 8 is connected to the outer impeller shaft 5, the inner impeller generator 9 is arranged inside the outer impeller 1, and the cable of the inner impeller generator 9 is arranged to pass out from the fixed part of the outer shell of the outer impeller generator 8, so as to realize simultaneous power generation of the inner impeller 2 and the outer impeller 1. However, this structure can greatly reduce the power generation efficiency of the inner impeller 2, and has high requirements for the internal space of the outer impeller 1, therefore, the present technology designs a bidirectional generator which can realize the power generation structure requirement of the outer impeller 1 wrapping the inner impeller 2, realize synchronous power generation of the double impellers without interference, and save space ratio while improving efficiency.

[0036] The bidirectional generator includes the outer impeller generator 8 and the inner impeller generator 9, the outer impeller generator 8 and the inner impeller generator 9 are arranged in the same accommodating cavity 18, the outer impeller generator 8 and the inner impeller generator 9 are composed of a rotor 10 formed by metal wires and a stator 11 formed by magnets, wherein the outer impeller shaft 5 for transmitting the rotating force of the outer impeller 1 is connected to the outer impeller generator 8, the inner impeller shaft 7 for transmitting the rotating force of the inner impeller 2 is connected to the inner impeller generator 9, the outer impeller shaft 5 is arranged outside the inner impeller shaft 7, the inner impeller shaft 7 penetrates the outer impeller generator 8, a rotating connection device 17 is arranged between the inner impeller shaft 7 and the outer impeller shaft 5, and the rotating connection device 17 can be a bearing.

[0037] The outer side of the outer impeller generator 8 and the inner impeller generator 9 is provided with a wind guide cavity 12. The wind guide cavity 12 can be a continuous cavity or a plurality of discontinuous cavities around the outer impeller generator 8 and / or the inner impeller generator 9. The wind guide cavity 12 can be formed by a jacket structure. The air inlet of the wind guide cavity 12 corresponds to the air outlet of the outer impeller 1, so that the air flowing out of the outer impeller 1 can enter the wind guide cavity 12, thereby cooling the outer impeller generator 8 and the inner impeller generator 9.

[0038] As shown in Figure 4 The outer side of the accommodating cavity 18 is provided with a backflow cover 13. As shown in Figure 5 In the present technology, the wind guide cavity 12 and the accommodating cavity 18 accommodating the outer impeller generator 8 and the inner impeller generator 9 are connected through the backflow cover 13. The air outlet of the wind guide cavity 12 enters the inner part of the outer impeller generator 8 or the inner impeller generator 9 through the backflow cover 13, thereby further improving the cooling effect of the outer impeller generator 8 and the inner impeller generator 9.

[0039] The center of the air inlet side of the outer impeller 1 is provided with a flow straightener 16. In the present technology, the shape of the flow straightener 16 is preferably conical, which can linearly and effectively utilize the wind energy in the whole area of the air inlet side. The outer side of the outer impeller 1 is provided with a fish fin support 14 which can rotate with the wind. The bottom of the fish fin support 14 is provided with a base 15. The fish fin support 14 and the base 15 are rotationally connected, so that the fish fin support 14 can be selected. The air inlet side of the outer impeller 1 can be directed to the direction with the maximum wind power. The flow straightener 16 and the rotatable fish fin support 14 form a device which can actively seek the optimal wind direction.

[0040] Although the present application has been described in detail with general description and specific embodiments above, some modifications or improvements can be made on the basis of the present application, which is obvious to those skilled in the art. Therefore, these modifications or improvements made on the basis of not deviating from the spirit of the present application, are within the scope of the present application.

Claims

1. A wind-driven ducted blade wind power generation device, characterized in that: It includes a coaxial outer impeller and an inner impeller, wherein the outer impeller encloses the inner impeller, the outer impeller has more than one outer helical blade, and the inner impeller has more than one inner helical blade, wherein the outer helical blade and the inner helical blade rotate in opposite directions; The outer impeller includes an outer helical blade, an outer impeller shaft, and an impeller housing. The outer helical blade is fixedly disposed inside the outer impeller housing, and the outer impeller shaft is fixedly connected to the center of the outer impeller blade or the outer impeller housing. The outer impeller shaft is sleeved on the outside of the inner impeller shaft, and a rotary connection device is provided between the two. The outer impeller shaft, used to transmit the rotational force of the outer impeller, connects to the outer impeller generator; the inner impeller shaft, used to transmit the rotational force of the inner impeller, connects to the inner impeller generator.

2. The wind-driven ducted blade wind power generation device according to claim 1, characterized in that: The distance between the outer spiral blade and the inner spiral blade is not less than 2 mm.

3. The wind-driven ducted blade wind power generation device according to claim 1, characterized in that: The diameter of the outer impeller on the air outlet side is wider than the diameter on its air inlet side.

4. A wind-driven ducted blade wind power generation device according to claim 1, characterized in that: The diameter of the inner impeller on the air outlet side is narrower than the diameter on its air inlet side.

5. A wind-driven ducted blade wind power generation device according to claim 1, characterized in that: The number of blades in both the outer and inner impellers is no less than 3.

6. A wind-driven ducted blade wind power generation device according to claim 1, characterized in that: The outer impeller generator and the inner impeller generator are provided with air guide chambers on their outer sides, and the air inlet of the air guide chamber corresponds to the air outlet of the outer impeller.

7. A wind-driven ducted blade wind power generation device according to claim 6, characterized in that: The air outlet of the air guide cavity is equipped with a return shroud, and the air outlet of the air guide cavity enters the interior of the outer impeller generator or the inner impeller generator through the return shroud.

8. A wind-driven ducted blade wind power generation device according to claim 1, characterized in that: A fairing is provided at the center of the air inlet side of the outer impeller.

9. A wind-driven ducted blade wind power generation device according to claim 1, characterized in that: The outer impeller is equipped with a fin support that can rotate with the wind, so that the air intake side of the outer impeller faces the direction with the greatest air intake force.

Images