A rotary wheel acceleration mechanism and a vertical axis micro wind generator

Abstract

This utility model discloses a rotary gear acceleration mechanism and a vertical axis micro wind generator, including a central shaft of blades and a rotary accelerator. The rotary accelerator includes a planetary gear support, planetary gears, an internal gear ring, a sun gear, and a rotor drive shaft. The central shaft of the blades is fixed to the planetary gear support, which is connected to planetary gears. The planetary gears mesh with the internal gear ring and the sun gear. The rotor drive shaft is fixed to the sun gear. The central shaft of the blades and the rotor drive shaft are coaxially arranged. Unlike previous multi-stage parallel shaft schemes, the input and output shafts of this utility model are coaxially arranged, significantly reducing the radial dimension of the rotary accelerator, resulting in a compact structure and smaller volume. This allows for good adaptation to vertical axis micro wind generators, and also reduces energy loss and damping during transmission, leading to lower starting wind speeds and a wider range of applications.

Description

Technical Field

[0001] This utility model relates to the field of wind power generation, specifically to a rotary wheel acceleration mechanism and a vertical axis micro wind generator including such a rotary wheel acceleration mechanism. Background Technology

[0002] Wind turbines can be mainly divided into two categories: horizontal axis wind turbines and vertical axis wind turbines. Vertical axis wind turbines are those whose rotor axis is perpendicular to the ground or the mounting plane. Vertical axis wind turbines are characterized by their compact structure, flexibility in adapting to wind direction changes, and low starting wind speed.

[0003] A wind turbine uses wind power to convert the mechanical energy generated by the rotation of wind blades into electrical energy. More specifically, the wind blades rotate when acted upon by airflow, and this rotation is transmitted to the central shaft of the blades. The central shaft is connected to the generator inside the equipment, providing rotational power to the generator. The rotor inside the generator moves relative to the stator, cutting magnetic field lines, generating a corresponding induced electromotive force, thereby realizing the conversion of mechanical energy into electrical energy.

[0004] Early wind turbines used a simple transmission method: the blade shaft was directly connected to the rotor inside the generator. Thus, for every unit of electricity output from the wind, the generator stored and utilized only that unit of electricity. Later, multi-stage gearboxes were used to amplify the power output, achieving a larger transmission ratio. For every unit of electricity output from the wind, multiple units of electricity were stored and utilized. However, using multi-stage gearboxes for power amplification resulted in large gearboxes, bulky structures, and low transmission efficiency. More importantly, the drive shafts were multi-stage parallel shafts, meaning the input and output shafts did not share the same shaft and were located on different axes. This was primarily used in horizontal gearboxes, as exemplified by the Chinese utility model patent CN202531365U, "High-Power Wind Turbine Generator Speed-Increasing Gearbox."

[0005] In wind turbine applications, this type of horizontal gearbox is more suitable for high-power horizontal axis wind turbines. This is because the blades of horizontal axis wind turbines are arranged horizontally and perpendicular to the mounting column of the equipment, which provides relatively sufficient installation space and position for the transmission gearbox.

[0006] However, when applied to vertical axis wind turbines, especially small-power micro wind turbines that require very low starting wind speeds, the application of this non-coaxial multi-stage parallel shaft is difficult for the following reasons: (1) In a vertical axis micro wind turbine, the central shaft of the blades is vertically connected to the generator below, and the installation space and position of the intermediate transmission structure are very limited, making it impossible to install a horizontal multi-stage gearbox; (2) The starting wind speed required for micro wind turbines must be very low to meet the requirements for starting and generating electricity in light wind conditions. The application scenarios are more extensive and the restrictions are less than those for high-power horizontal axis wind turbines. Micro wind turbines are required to be used in various ordinary outdoor scenarios, rather than being limited to strong wind scenarios such as mountaintops and coastlines as conventional horizontal wind turbines. The multi-stage parallel shaft structure has high energy loss and high damping during the transmission process, making it relatively difficult to start and requiring higher wind speed and air volume. In practical applications, starting in light wind conditions is very difficult, and it is not actually suitable for use in vertical axis micro wind turbines. Utility Model Content

[0007] To overcome the shortcomings of the existing technology, one of the objectives of this utility model is to provide a rotating wheel system acceleration mechanism, and the other is to provide a vertical axis micro wind turbine including such a rotating wheel system acceleration mechanism, which can solve the problems of large size, high loss and unsuitability for micro wind turbines in the multi-stage transmission mechanism of existing wind turbines.

[0008] This utility model is achieved through the following technical solution:

[0009] A rotary gear acceleration mechanism includes: a central shaft for a fan blade; a rotary accelerator including: a planetary gear support, a plurality of planetary gears, an internal gear ring, a sun gear, and a rotor drive shaft; the central shaft for the fan blade is radially fixed to the planetary gear support, the planetary gear support is rotatably connected to a plurality of planetary gears in the circumferential direction, the outer sides of the planetary gears mesh with the internal gear ring, the internal gear ring is fixedly disposed; the planetary gears simultaneously mesh with the sun gear for transmission; the rotor drive shaft is fixedly connected to the sun gear for outputting rotational power amplified by a factor of magnification; the central shaft for the fan blade and the rotor drive shaft are coaxially arranged in the vertical direction.

[0010] Furthermore, the rotary wheel acceleration mechanism also includes a generator disk; the generator disk contains a rotor and a stator that can rotate relative to each other; the stator is fixedly arranged inside the generator disk; the rotor drive shaft is fixedly connected to the rotor to drive the rotor to rotate relative to the stator; the rotation accelerator is fixedly arranged on the generator disk, and the rotor drive shaft passes through both the rotation accelerator and the generator disk.

[0011] Furthermore, the rotary accelerator also includes an accelerator housing with a cavity inside, and the internal gear ring is tightly fitted inside the cavity of the accelerator housing; the accelerator housing is fixedly connected to the top surface of the generator disk.

[0012] Furthermore, the rotary wheel acceleration mechanism also includes: a fan blade and a fan blade connecting frame; the fan blade is installed perpendicular to the horizontal plane, several fan blades are circumferentially fixed to the fan blade connecting frame, and the fan blade is radially fixed to the fan blade connecting frame, so that the fan blade drives the fan blade connecting frame and the fan blade central shaft to rotate.

[0013] Furthermore, the rotary wheel acceleration mechanism further includes: a fixed chassis; the fixed chassis is disposed on the top or bottom of the wind blade, and an axial receiving space is formed between the fixed chassis and the wind blade connecting frame; the rotary accelerator and the generator disk are both fixed on the fixed chassis and housed in the axial receiving space between the fixed chassis and the wind blade connecting frame.

[0014] Furthermore, the planetary gear support includes a gear carrier central shaft, the upper end of which extends outside the accelerator housing and is radially fixed to the fan blade central shaft; the gear carrier central shaft is connected to the accelerator housing via a rotary bearing.

[0015] Furthermore, the rotary wheel acceleration mechanism also includes: a wind turbine housing; the wind turbine housing covers the rotary accelerator and the generator disk, and the central shaft of the wind blade passes through the wind turbine housing.

[0016] Furthermore, the generator panel is also provided with a rotor support; the rotor support is fixed to the rotor drive shaft, and the rotor is housed within the rotor support.

[0017] A vertical axis micro wind generator, characterized in that it includes the aforementioned planetary wheel acceleration mechanism.

[0018] Compared with the prior art, the beneficial effects that this utility model can achieve are as follows:

[0019] During operation, the central shaft of the fan blades rotates around itself, causing the planetary gear support inside the rotary accelerator to rotate. This causes each planetary gear to revolve around the internal gear ring, synchronously driving the sun gear to rotate. The sun gear drives the rotor drive shaft, which is pivotally connected to it, to rotate. The rotor drive shaft is connected to the rotor inside the generator below, causing the rotor to rotate relative to the stator, cutting magnetic field lines and generating an induced electromotive force.

[0020] (1) The central axis of the wind turbine rotates and outputs rotational power in the accelerator. The central axis of the wind turbine is used as the input shaft. After being transmitted and accelerated by the planetary gear system, the rotor drive shaft is used as the output shaft, which can output rotational power in multiples. The wind turbine outputs one unit of electricity, and the generator can store and utilize multiple units of electricity.

[0021] (2) More importantly, unlike previous multi-stage parallel axis schemes, the input and output shafts of this invention are coaxially arranged. The central shaft of the wind turbine, serving as the input shaft, is connected to the planetary gear support, while the rotor drive shaft, serving as the output shaft, is directly connected to the sun gear. This significantly reduces the radial dimension of the entire rotary accelerator, resulting in a compact structure and smaller volume. In vertical axis micro wind turbines, the installation space between the central shaft of the wind turbine and the generator disk is very limited, thus requiring a higher degree of structural compactness for the accelerator, especially for small-sized, portable micro wind turbines. The rotary wheel acceleration mechanism of this invention possesses this characteristic, allowing the rotary accelerator to be well adapted and applied in vertical axis micro wind turbines.

[0022] (3) The coaxial structure reduces the transmission points of the acceleration mechanism, resulting in less energy loss and damping during transmission. This translates to smoother power generation even with lower input power, lower starting wind speed, and higher power generation efficiency. Consequently, the equipment can be used in a wider range of scenarios, such as outdoor environments with relatively weak wind resources, improving the versatility of wind turbines and giving them significant practical application value. Attached Figure Description

[0023] Figure 1 The diagram shows the installation position of the rotary wheel acceleration mechanism inside the vertical axis micro wind turbine.

[0024] Figure 2 As shown Figure 1 The front view;

[0025] Figure 3 The image shown is a cross-sectional view of the internal structure of the planetary gear train acceleration mechanism;

[0026] Figure 4 As shown Figure 3 The front view;

[0027] Figure 5 The diagram shown is an exploded view of the acceleration mechanism of the planetary gear train.

[0028] Figure 6 The diagram shown is a schematic of the internal structure of a rotary accelerator.

[0029] Figure 7 The diagram shown is a schematic representation of the internal structure of the rotating accelerator from another perspective.

[0030] In the diagram: 10. Wind turbine central shaft; 20. Rotary accelerator; 21. Planetary gear support; 22. Planetary gear; 23. Internal gear ring; 24. Sun gear; 25. Rotor drive shaft; 26. Accelerator housing; 30. Generator panel; 31. Rotor; 32. Stator; 33. Rotor support; 40. Wind turbine blade; 50. Wind turbine blade connecting frame; 60. Fixed chassis; 70. Wind turbine assembly housing. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0032] In the description of this utility model, it should be understood that the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0034] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0035] This utility model discloses a rotating wheel system acceleration mechanism, which is applied to vertical axis wind power generation.

[0036] See Figures 1-4This rotary gear acceleration mechanism includes a fan blade central shaft 10 and a rotation accelerator 20. The fan blade central shaft 10 is rotatably mounted to input rotational power into the rotation accelerator 20. The rotation accelerator 20 amplifies the power input from the fan blade central shaft 10 before outputting it. (See reference...) Figures 5-7 The rotary accelerator 20 includes: a planetary gear carrier 21, multiple planetary gears 22, an internal gear ring 23, a sun gear 24, and a rotor drive shaft 25; wherein, the fan blade central shaft 10 is radially fixed to the planetary gear carrier 21 and arranged coaxially with the planetary gear carrier 21; the planetary gear carrier 21 is rotatably connected to multiple planetary gears 22 via bearings along its circumference, and the outer sides of each planetary gear 22 are meshed with the internal gear ring 23; the internal gear ring 23 is fixedly installed; the planetary gears 22 simultaneously mesh with and drive the sun gear 24. The rotor drive shaft 25 is fixedly connected to the sun gear 24 and arranged coaxially with the sun gear 24, see Figures 3-4 , Figure 6 .

[0037] This utility model also includes a generator panel 30, which serves as the power generation part of the device. The generator panel 30 is equipped with a rotor 31 and a stator 32. The rotor drive shaft 25 is fixedly connected to the rotor 31 so that the rotation of the rotor 31 can drive the rotor 31 to rotate relative to the stator 32.

[0038] See Figures 1-4 The rotary accelerator 20 is fixedly arranged on the generator disk 30, achieving a compact installation structure in the axial direction. The central shaft 10 of the fan blade, the sun gear 24, and the rotor drive shaft 25 are arranged coaxially, also achieving a compact installation structure in the radial direction.

[0039] During operation, the fan blade 40 drives the fan blade central shaft 10 to rotate around itself. The fan blade central shaft 10 drives the planetary gear support 21 inside the rotation accelerator 20 to rotate, causing each planetary gear 22 to revolve around the internal gear ring 23 in meshing motion. This synchronously drives the sun gear 24 to rotate on its own axis. The sun gear 24 drives the rotor drive shaft 25, which is coaxially pivotally connected to it, to rotate. The rotor drive shaft is connected to the rotor 31 inside the generator, causing the rotor 31 to rotate relative to the stator 32, cutting magnetic field lines and generating an induced electromotive force.

[0040] The technical effects of this utility model are as follows:

[0041] (1) The central shaft 10 of the wind turbine outputs rotational power to the rotation accelerator 20. The central shaft 10 of the wind turbine serves as the input shaft. After being transmitted and accelerated by the rotating wheel system, the rotor drive shaft 25 serves as the output shaft, which can output rotational power in multiples. The wind turbine outputs one times the amount of electricity, and the generator can store and utilize multiple times the amount of electricity.

[0042] (2) More importantly, unlike previous multi-stage parallel shaft schemes, the input and output shafts of this invention are coaxially arranged. The central shaft 10 of the fan blades, serving as the input shaft, is connected to the planetary gear support, while the rotor drive shaft 25, serving as the output shaft, is directly connected to the sun gear 24. This significantly reduces the radial dimension of the entire rotary accelerator 20, resulting in a compact structure and smaller size. See Figure 1 and Figure 2 It is understandable that in a vertical axis micro wind turbine, the installation space between the central shaft 10 of the blades and the generator disk 30 is very limited, which requires a higher degree of structural compactness of the accelerator, especially for small-sized, mobile micro wind turbines; the rotary wheel acceleration mechanism of this utility model has such characteristics and can be well adapted and applied in a vertical axis micro wind turbine.

[0043] (3) The coaxial structure reduces the transmission points of the acceleration mechanism, resulting in less energy loss and damping during transmission. This translates to smoother power generation even with lower input power, lower starting wind speed, and higher power generation efficiency. Consequently, the equipment can be used in a wider range of scenarios, such as outdoor environments with relatively weak wind resources, improving the versatility of wind turbines and giving them significant practical application value.

[0044] Preferably, see Figures 5-6 The rotary accelerator 20 also includes an accelerator housing 26, which serves as the housing part of the entire rotary accelerator 20; the accelerator housing 26 has a cavity, and the internal gear ring 23 is tightly fitted inside the cavity of the accelerator housing 26; the accelerator housing 26 is fastened to the top surface of the generator disk 30.

[0045] Preferably, see Figures 1-2 This utility model also includes a fan blade 40 and a fan blade connecting frame 50. The fan blade 40 is installed perpendicular to the horizontal plane, and multiple fan blades 40 are circumferentially fixed to the fan blade connecting frame 50. The fan blades 40 are radially fixed to the fan blade connecting frame 50. When the fan blade 40 is subjected to airflow, the fan blade 40 rotates and drives the fan blade connecting frame 50 to rotate, which in turn drives the fan blade central shaft 10 to rotate, inputting rotational power into the rotation accelerator 20.

[0046] Preferably, see Figures 1-2This utility model also includes a fixed chassis 60, which serves as the outer frame of the generator and can be used to connect the support pipe and the guide vane 40. The fixed chassis 60 is positioned at the top or bottom of the vane 40, forming an axial accommodating space between the fixed chassis 60 and the vane connecting frame 50. It is understood that this axial accommodating space is limited and unsuitable for installing large multi-stage gearboxes or accommodating multi-stage parallel shafts. The axially arranged rotary accelerator 20 and generator disk 30 are both fixed to the fixed chassis 60 and housed within the axial accommodating space between the fixed chassis 60 and the vane connecting frame 50, thus achieving a compact installation structure for the transmission part of the equipment and a small overall size.

[0047] Preferably, the planetary gear support also includes a gear carrier central shaft for coaxial connection with the fan blade central shaft 10. The upper end of the gear carrier central shaft extends outside the accelerator housing 26 and is radially fixed to the fan blade central shaft 10; the gear carrier central shaft is connected to the accelerator housing 26 via a rotating bearing.

[0048] Preferably, see Figure 3 The present invention also includes a wind turbine housing 70, which is used to enclose the rotary accelerator 20 and the generator disk 30 together. The wind turbine housing 70 covers the rotary accelerator 20 and the generator disk 30, and the wind blade central shaft 10 passes through the wind turbine housing 70.

[0049] Preferably, see Figure 5 The generator panel 30 also includes a rotor support 33 for mounting the rotor 31. The rotor support 33 is fixed to the rotor drive shaft 25, and the rotor 31 is housed within the rotor support 33. The rotor drive shaft 25 drives the rotor support 33 to rotate within the generator panel 30, thereby causing the rotor 31 to rotate relative to the fixed stator 32.

[0050] This utility model also discloses a vertical axis micro wind turbine, including the aforementioned planetary wheel acceleration mechanism. Any wind turbine that employs the same or substantially the same acceleration mechanism should be within the protection scope of this utility model.

Claims

1. A planetary gear train acceleration mechanism, characterized in that, include: Wind turbine blade central axis; The rotary accelerator includes: a planetary gear carrier, several planetary gears, an internal gear ring, a sun gear, and a rotor drive shaft; The central shaft of the fan blade is radially fixed to the planetary gear support. The planetary gear support is rotatably connected to several planetary gears in the circumferential direction. The outer sides of the planetary gears mesh with an internal gear ring, which is fixedly installed. The planetary gears also mesh with the sun gear for transmission. The rotor drive shaft is fixedly connected to the sun gear and is used to output the amplified rotational power. The central shaft of the fan blade and the rotor drive shaft are arranged coaxially in the vertical direction.

2. The planetary gear train acceleration mechanism as described in claim 1, characterized in that, The rotary wheel acceleration mechanism further includes a generator disk; the generator disk contains a rotor and a stator that can rotate relative to each other; the stator is fixedly arranged inside the generator disk; the rotor drive shaft is fixedly connected to the rotor to drive the rotor to rotate relative to the stator; the rotation accelerator is fixedly arranged on the generator disk, and the rotor drive shaft passes through both the rotation accelerator and the generator disk.

3. The planetary gear train acceleration mechanism as described in claim 2, characterized in that, The rotary accelerator also includes an accelerator housing, which has a cavity inside. The internal gear ring is tightly fitted inside the cavity of the accelerator housing. The accelerator housing is fixedly connected to the top surface of the generator disk.

4. The planetary gear train acceleration mechanism as described in claim 2, characterized in that, The rotary wheel acceleration mechanism further includes: a fan blade and a fan blade connecting frame; the fan blade is installed perpendicular to the horizontal plane, several fan blades are circumferentially fixed to the fan blade connecting frame, and the fan blade is radially fixed to the fan blade connecting frame, so that the fan blade drives the fan blade connecting frame and the fan blade central axis to rotate.

5. The planetary gear train acceleration mechanism as described in claim 4, characterized in that, The rotary wheel acceleration mechanism further includes: a fixed chassis; the fixed chassis is disposed on the top or bottom of the wind blade, and an axial receiving space is formed between the fixed chassis and the wind blade connecting frame; the rotary accelerator and the generator disk are both fixed on the fixed chassis and housed in the axial receiving space between the fixed chassis and the wind blade connecting frame.

6. The planetary gear train acceleration mechanism as described in claim 3, characterized in that, The planetary gear support includes a gear carrier central shaft, the upper end of which extends outside the accelerator housing and is radially fixed to the fan blade central shaft; the gear carrier central shaft is connected to the accelerator housing via a rotary bearing.

7. The planetary gear train acceleration mechanism as described in claim 3, characterized in that, The rotary wheel acceleration mechanism further includes: a wind turbine housing; the wind turbine housing covers the rotary accelerator and the generator disk, and the central shaft of the wind blade passes through the wind turbine housing.

8. The planetary gear train acceleration mechanism as described in claim 2, characterized in that, The generator panel is also equipped with a rotor support; the rotor support is fixed to the rotor drive shaft, and the rotor is housed within the rotor support.

9. A vertical axis micro wind generator, characterized in that, Including the rotary wheel acceleration mechanism as described in any one of claims 1 to 8.

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