A coaxial double-blade wind power generation mechanism

Abstract

The application discloses a coaxial double-blade wind power generation mechanism and belongs to the technical field of wind power generation. The wind power generation mechanism comprises a tower drum assembly, a cabin, a power generation assembly and two groups of wind blades, and the power generation assembly is arranged in the cabin. The power generation assembly comprises two input shafts which are rotationally arranged in the cabin, and the two groups of wind blades are fixedly connected to the end portions of the two input shafts. A normal surface gear is arranged between the two input shafts, and matching gears are arranged on the two sides of the normal surface gear. Two groups of gear pieces are respectively engaged on the matching gears on the two sides of the normal surface gear. A matching gear piece is engaged between the two groups of gear pieces on the two sides of the normal surface gear. An output stage cylindrical gear is engaged on the two groups of matching gear pieces. An output shaft is fixedly connected to the output stage cylindrical gear, and a power generation motor is fixedly connected to the end portion of the output shaft. The application can solve the problem that the gear box of the existing double-blade wind power generation mechanism is large in size and weight.

Description

Technical Field

[0001] This invention relates to the field of wind power generation technology, and in particular to a coaxial dual-blade wind power generation mechanism. Background Technology

[0002] Against the backdrop of global energy structure transformation, wind power, as a clean and renewable energy source, has attracted increasing attention from industry and academia regarding its technological iteration and equipment upgrades. Currently, most mainstream wind turbines on the market adopt a single-layer, three-blade, horizontal-axis structure. However, according to the Betz limit theory in aerodynamics, the ideal maximum wind energy capture efficiency of a single-layer wind turbine is only 59.3%, and in practical engineering applications, limited by blade surface roughness, wake effects, and mechanical transmission losses, its actual wind energy conversion rate is often difficult to exceed 45%.

[0003] To further improve the power generation per unit swept area and break through the efficiency ceiling of single impellers, coaxial dual-blade structures have gradually become a hot research topic. Coaxial dual-blade power generation mechanisms typically have two sets of impellers, one in front and one behind. The rear impeller can effectively capture and utilize the wake vortex kinetic energy generated by the rotation of the front impeller, thereby achieving secondary work on the flowing air.

[0004] While coaxial twin-blade fans offer significant advantages in aerodynamic theory, their mechanical engineering implementation faces extremely stringent challenges. The core challenge lies in how to smoothly and efficiently combine these two sets of blades, which typically rotate in opposite directions or at different speeds, within the confined space of the engine room, and ultimately output them uniformly to the generator. This is a critical engineering problem that urgently needs to be solved in this field. Current power combination solutions often employ massive planetary gear sets or multi-stage tandem reducers. This not only dramatically increases the size and weight of the gearbox, severely deteriorating the stress conditions and fatigue life of the tower, but also results in persistently high high-altitude maintenance costs. Summary of the Invention

[0005] The main objective of this invention is to provide a coaxial dual-blade wind power generation mechanism, which aims to solve the problem that the gearbox of the existing dual-blade wind power generation mechanism is large in size and weight.

[0006] To achieve the above objectives, the present invention provides a coaxial dual-blade wind power generation mechanism, comprising a tower assembly, a nacelle, a power generation component, and two sets of wind blades. The bottom end of the tower assembly is fixed to the ground, the nacelle is connected to the top end of the tower assembly, and the power generation component is disposed within the nacelle. The power generation component includes two input shafts rotatably disposed within the nacelle. The two sets of wind blades are respectively fixedly connected to the ends of the two input shafts. An orthogonal gear is disposed between the two input shafts, and the two input shafts are respectively fixedly connected to the orthogonal gear. Both sides of the orthogonal gear are provided with mating teeth, and two sets of gear components mesh on the mating teeth on both sides of the orthogonal gear. A mating gear component meshes between the two sets of gear components on both sides of the orthogonal gear. An output stage cylindrical gear meshes on the two sets of mating gear components, and an output shaft is fixedly connected to the output stage cylindrical gear. A generator motor is fixedly connected to the end of the output shaft.

[0007] Optionally, the gear component includes: First drive shaft; An input stage cylindrical gear is fixedly connected to the first drive shaft, and the input stage cylindrical gear meshes with the mating teeth on the side of the orthogonal surface gear; An intermediate-stage driving cylindrical gear is fixedly connected to the first drive shaft, and the intermediate-stage driving cylindrical gear meshes with the mating gear component.

[0008] Optionally, the mating gear includes: Second drive shaft; An intermediate driven cylindrical gear is fixedly connected to the second drive shaft, and the intermediate driven cylindrical gear meshes with the intermediate driving cylindrical gear; A non-orthogonal surface gear is fixedly connected to the second drive shaft, and the non-orthogonal surface gear meshes with the output stage cylindrical gear.

[0009] Optionally, a main shaft support bearing housing is provided in the engine compartment, and the input shaft is rotatably fitted into the main shaft support bearing housing via a bearing.

[0010] Optionally, flanges are fixedly connected to the connection points of the two input shafts and the two sets of fan blades, and the two sets of fan blades are fixedly connected to the input shafts through the flanges.

[0011] Optionally, the power generation component is externally fixedly connected to a housing.

[0012] Optionally, the tower assembly is a hollow structure.

[0013] Optionally, the nacelle is rotatably mounted on the tower assembly.

[0014] Optionally, multiple steering motors are fixedly connected to the nacelle, an internal gear ring is fixedly connected to the top of the tower assembly, and gears are fixedly connected to the output ends of the multiple steering motors, with the gears meshing with the internal gear ring.

[0015] Optionally, four steering motors are provided.

[0016] This invention proposes a coaxial dual-blade wind power generation mechanism that integrates the power input from the front and rear sets of wind blades through orthogonal gears. This eliminates the need for bulky planetary gear sets or multi-stage series reducers, effectively simplifying the transmission structure, reducing the overall size and weight of the gearbox, lessening the load on the tower assembly, reducing tower fatigue, and lowering the cost of high-altitude maintenance. Furthermore, this transmission structure utilizes the meshing characteristics of orthogonal gears to counteract the axial vibration of the two inputs, resulting in better operational stability. It can more smoothly combine and output the mechanical energy with different speeds and torques, improving power transmission efficiency. This effectively enhances the overall power generation efficiency and service life of the coaxial dual-blade wind power generation mechanism, solving the problem of the large size and weight of the gearbox in existing dual-blade wind power generation mechanisms. Attached Figure Description

[0017] Figure 1 A schematic diagram of the overall structure of a coaxial dual-blade wind power generation mechanism provided for an embodiment of the invention; Figure 2 This is a schematic diagram of the internal layout of the cabin; Figure 3 for Figure 2 Schematic diagram of the internal structure of the middle shell; In the diagram, 1. Tower assembly; 2. Nacelle; 201. Main shaft support bearing housing; 202. Steering motor; 3. Generator assembly; 301. Housing; 4. Fan blade; 5. Input shaft; 501. Flange; 6. Orthogonal gear; 7. Gear assembly; 701. First drive shaft; 702. Input stage cylindrical gear; 703. Intermediate stage driving cylindrical gear; 8. Mating gear assembly; 801. Second drive shaft; 802. Intermediate stage driven cylindrical gear; 803. Non-orthogonal gear; 9. Output stage cylindrical gear; 10. Output shaft; 11. Generator motor. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0019] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0020] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0021] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0022] Please see Figures 1 to 3 This invention provides a coaxial dual-blade wind power generation mechanism, which may include: a tower assembly 1, a nacelle 2, a power generation component 3, and two sets of wind blades 4. The bottom end of the tower assembly 1 is fixed to the ground; the nacelle 2 is connected to the top end of the tower assembly 1; the power generation component 3 is disposed inside the nacelle 2; the power generation component 3 includes two input shafts 5, which are rotatably disposed inside the nacelle 2. The two sets of wind blades 4 are respectively fixedly connected to the ends of the two input shafts 5. An orthogonal gear 6 is disposed between the two input shafts 5, and the two input shafts 5 are respectively fixedly connected to the orthogonal gear 6. Both sides of the orthogonal gear 6 are provided with mating teeth. Two sets of gear components 7 are respectively meshed on the mating teeth on both sides of the orthogonal gear 6. A mating gear component 8 is meshed between the two sets of gear components 7 on both sides of the orthogonal gear 6. An output stage cylindrical gear 9 is meshed on the two sets of mating gear components 8. An output shaft 10 is fixedly connected to the output stage cylindrical gear 9, and a generator motor 11 is fixedly connected to the end of the output shaft 10.

[0023] In this embodiment, the two side blades 4 capture wind energy and drive their respective connected input shafts 5 to rotate. The two input shafts 5 synchronously transmit the rotation to the central orthogonal gear 6. The orthogonal gear 6 integrates the two rotations and simultaneously drives the meshing gear components 7 on both sides to rotate. The rotation of the two side gear components 7 together drives the meshing gear component 8 in the middle. The meshing gear component 8 transmits power to the output stage cylindrical gear 9 that meshes with it. The output stage cylindrical gear 9 drives the output shaft 10 to rotate. Finally, the output shaft 10 drives the generator motor 11 to operate, completing the conversion of wind energy into electrical energy. This coaxial dual-input transmission structure can integrate the wind energy captured by the two blades, improving the wind energy utilization rate. At the same time, the meshing transmission structure of the orthogonal gear 6 can offset some of the axial vibration of the two inputs, improving the overall stability of the power generation mechanism.

[0024] This coaxial dual-blade wind power generation mechanism integrates the power input from the front and rear sets of blades 4 through orthogonal gears 6, eliminating the need for a large planetary gear set or multi-stage series reducer. This effectively simplifies the transmission structure, reduces the overall size and weight of the gearbox, lightens the load on the tower assembly 1, reduces stress fatigue on the tower assembly 1, and also lowers the cost of high-altitude maintenance. Moreover, this transmission structure utilizes the meshing characteristics of the orthogonal gears 6 to counteract the axial vibration of the two inputs, resulting in better operational stability. It can more smoothly combine and output the mechanical energy with different speeds and torques from the two inputs, improving the efficiency of power transmission. This effectively improves the overall power generation efficiency and service life of the coaxial dual-blade wind power generation mechanism, solving the problem of the large size and weight of the gearbox in existing dual-blade wind power generation mechanisms.

[0025] It should be noted that the two sets of wind blades 4 are arranged one after the other along the same axis of rotation and are respectively set at both ends of the power generation component 3. Along the direction of incoming flow, the front wind blade 4 first captures the wind energy in the incoming flow; after the airflow is disturbed by the front wind blade 4, a wake is formed, and the rear wind blade 4 located downstream of it further utilizes the remaining energy in the wake to achieve secondary capture of wind energy.

[0026] Please see Figure 3 In some possible implementations, the gear component 7 may include: a first drive shaft 701, an input stage cylindrical gear 702, and an intermediate stage driving cylindrical gear 703, wherein the input stage cylindrical gear 702 is fixedly connected to the first drive shaft 701 and meshes with the mating teeth on the side of the orthogonal surface gear 6; the intermediate stage driving cylindrical gear 703 is fixedly connected to the first drive shaft 701 and meshes with the mating gear component 8.

[0027] Specifically, the first drive shaft 701 receives the integrated power from the orthogonal gear 6, inputs it through the input stage cylindrical gear 702, and then outputs it to the subsequent mating gear 8 through the intermediate stage driving cylindrical gear 703. The power is stably transmitted along the first drive shaft 701, and the entire transmission system is always coaxially arranged, without adding extra lateral space to the transmission structure. Combined with the power integration effect of the orthogonal gear 6, the smoothness of power transmission is further guaranteed.

[0028] Please see Figure 3 In some embodiments, the gear component 8 may include: a second drive shaft 801, an intermediate driven cylindrical gear 802, and a non-orthogonal surface gear 803, wherein the intermediate driven cylindrical gear 802 is fixedly connected to the second drive shaft 801 and meshes with the intermediate driving cylindrical gear 703; the non-orthogonal surface gear 803 is fixedly connected to the second drive shaft 801 and meshes with the output cylindrical gear 9.

[0029] In this embodiment, the second drive shaft 801 receives the power output from the gear component 7. After being input through the intermediate driven cylindrical gear 802, the power is transmitted to the subsequent output cylindrical gear 9 by the non-orthogonal surface gear 803. The power transmission is also arranged coaxially along the second drive shaft 801 throughout the entire process. This coaxial design, combined with the previous transmission structure, further maintains the stability of power transmission without increasing the overall lateral dimension of the device, ensuring that the integrated power input from the dual fan blades can be smoothly transmitted to the generator end.

[0030] Please see Figure 2 In some embodiments, a main shaft support bearing seat 201 is provided in the engine compartment 2, and the input shaft 5 is rotatably fitted into the main shaft support bearing seat 201 through the bearing.

[0031] Among them, the main shaft support bearing housing 201 can provide stable support and limit the two input shafts 5, preventing excessive sway of the input shafts 5 during high-speed rotation. At the same time, it can also bear part of the radial load transmitted from the fan blade 4, reduce the force loss of the transmission structure, and further improve the rotational stability of the entire main shaft system.

[0032] Please see Figure 2 In some possible implementations, flanges 501 are fixedly connected to the connection points of the two input shafts 5 and the two sets of fan blades 4, and the two sets of fan blades 4 are fixedly connected to the input shafts 5 through the flanges 501.

[0033] Flanges 501 are installed at the connection points of the two input shafts 5 and the two sets of fan blades 4 respectively. The two sets of fan blades 4 are connected to the input shafts 5 through the flanges 501. This connection method is convenient for disassembly and assembly, and facilitates quick replacement of fan blade components during production assembly and later maintenance, reducing the difficulty and time cost of maintenance operations.

[0034] Please see Figure 2 In some embodiments, the power generation component 3 is externally fixedly connected to a housing 301.

[0035] The encapsulation housing 301 installed on the outside of the power generation component 3 can protect the transmission gear set inside the housing 301, prevent wind and sand and moisture from corroding the transmission meshing parts, and extend the service life of the transmission components.

[0036] Furthermore, the tower assembly 1 is a hollow structure.

[0037] The tower assembly 1 adopts a hollow structure design, which can ensure structural strength, reduce its overall weight, reduce material costs, and the hollow cavity can also be used to lay various cables and pipelines, simplifying the wiring layout of the mechanism.

[0038] Two sets of wind blades 4 are fixedly connected to the corresponding input shafts 5 via flanges 501. The axes of the two input shafts 5 coincide, and they extend into the generator assembly 3 from opposite ends, each bearing the mechanical torque generated by the corresponding wind blade 4, transmitting the two wind energy inputs to the generator assembly 3 inside the housing 301, and then the subsequent wheel system completes the power transmission and converging.

[0039] Furthermore, in some possible implementations, the nacelle 2 is rotatably mounted on the tower assembly 1.

[0040] Please see Figure 2 In some embodiments, a plurality of steering motors 202 are fixedly connected to the nacelle 2, and an internal gear ring is fixedly connected to the top of the tower assembly 1. The output ends of the plurality of steering motors 202 are all fixedly connected to gears, which mesh with the internal gear ring.

[0041] Preferably, in some possible implementations, four steering motors 202 are provided.

[0042] The nacelle 2 is rotatably mounted on the tower assembly 1. Four steering motors 202 are evenly arranged circumferentially on the nacelle 2. An internal gear ring is provided on the top of the tower assembly 1. The output ends of the four steering motors 202 are all equipped with drive gears. The drive gears mesh with the internal gear ring. When it is necessary to adjust the windward angle of the wind blades according to the wind direction, the four steering motors 202 operate synchronously. Through the meshing transmission of the gears and the internal gear ring, the nacelle 2 is rotated as a whole. After the adjustment is in place, the steering motors 202 are locked to complete the windward operation. The adjustment process is smooth and reliable.

[0043] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. A coaxial dual-blade wind power generation mechanism, comprising a tower assembly (1), a nacelle (2), a power generation assembly (3), and two sets of wind blades (4), wherein the bottom end of the tower assembly (1) is fixed to the ground, the nacelle (2) is connected to the top end of the tower assembly (1), the power generation assembly (3) is disposed within the nacelle (2), the power generation assembly (3) includes two input shafts (5), the two input shafts (5) are rotatably disposed within the nacelle (2), and the two sets of wind blades (4) are respectively fixedly connected to the ends of the two input shafts (5), characterized in that, An orthogonal gear (6) is provided between the two input shafts (5). The two input shafts (5) are respectively fixedly connected to the orthogonal gear (6). Both sides of the orthogonal gear (6) are provided with mating teeth. Two sets of gear components (7) are respectively meshed on the mating teeth on both sides of the orthogonal gear (6). A mating gear component (8) is meshed between the two sets of gear components (7) on both sides of the orthogonal gear (6). An output stage cylindrical gear (9) is meshed on the two sets of mating gear components (8). An output shaft (10) is fixedly connected to the output stage cylindrical gear (9). A generator motor (11) is fixedly connected to the end of the output shaft (10).

2. The coaxial double-blade wind power generation mechanism according to claim 1, characterized in that, The gear component (7) includes: First drive shaft (701); An input stage cylindrical gear (702) is fixedly connected to the first drive shaft (701), and the input stage cylindrical gear (702) meshes with the mating teeth on the side of the orthogonal surface gear (6); An intermediate-stage driving cylindrical gear (703) is fixedly connected to the first drive shaft (701), and the intermediate-stage driving cylindrical gear (703) meshes with the mating gear component (8).

3. The coaxial dual-blade wind power generation mechanism according to claim 2, characterized in that, The mating gear component (8) includes: Second drive shaft (801); An intermediate driven cylindrical gear (802) is fixedly connected to the second drive shaft (801), and the intermediate driven cylindrical gear (802) meshes with the intermediate driving cylindrical gear (703); A non-orthogonal gear (803) is fixedly connected to the second drive shaft (801), and the non-orthogonal gear (803) meshes with the output stage cylindrical gear (9).

4. The coaxial double-blade wind power generation mechanism according to claim 1, characterized in that, The engine compartment (2) is provided with a main shaft support bearing seat (201), and the input shaft (5) is rotatably fitted into the main shaft support bearing seat (201) through the bearing.

5. The coaxial double-blade wind power generation mechanism according to claim 1, characterized in that, The two input shafts (5) are respectively fixedly connected to the two sets of fan blades (4) with flanges (501), and the two sets of fan blades (4) are fixedly connected to the input shafts (5) through the flanges (501).

6. The coaxial double-blade wind power generation mechanism according to claim 1, characterized in that, The power generation component (3) is externally fixedly connected to a housing (301).

7. The coaxial double-blade wind power generation mechanism according to claim 1, characterized in that, The tower assembly (1) is a hollow structure.

8. The coaxial double-blade wind power generation mechanism according to claim 1, characterized in that, The nacelle (2) is rotatably mounted on the tower assembly (1).

9. The coaxial double-blade wind power generation mechanism according to claim 8, characterized in that, Multiple steering motors (202) are fixedly connected to the nacelle (2), and an internal gear ring is fixedly connected to the top of the tower assembly (1). Gears are fixedly connected to the output ends of the multiple steering motors (202), and the gears mesh with the internal gear ring.

10. The coaxial dual-blade wind power generation mechanism according to claim 9, characterized in that, The steering motor (202) is provided in four parts.

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