Small and miniature wind driven generator with underneath type generator

Abstract

The utility model belongs to the technical field of wind power generation, and relates to a generator underneath type small and miniature wind driven generator which comprises a cabin, a wind power paddle, a tower drum and a generator, the wind power paddle is rotatably mounted at the front end of the cabin, and the generator is arranged on the outer side of the bottom of the tower drum. Torque is transmitted from top to bottom through the driving bevel gear on the horizontal shaft and the bevel gear on the vertical shaft, and finally the generator at the bottom of the tower drum generates electricity. The installation and use of the miniature wind driven generator are safer, more reliable, more convenient and faster, and the problems that the installation stability of the tower drum is difficult to guarantee and the installation and maintenance of the generator are extremely inconvenient due to the fact that the generator is integrated at the top of the tower drum in the prior art are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of wind power generation and relates to a small and micro wind power generator with a generator placed below. Background Art

[0002] In sparsely populated mountainous areas or coastal areas, there is generally a lack of power distribution. Some remote areas do not even have electricity, and they must have their own generators to provide basic lighting and small family use. my country is a vast country with extremely rich wind resources. There are sufficient monsoons in mountainous areas and coastal areas throughout the year. Wind energy is the kinetic energy generated by air flow. Wind is an inexhaustible energy source. Wind not only has great energy, but also has utilization value for nature. However, there is no better wind turbine so far, resulting in a waste of natural resources and not being generally properly utilized. Therefore, small and micro wind turbines suitable for basic lighting and small family use have great market potential.

[0003] However, although there are many types of existing small wind turbine structures, existing small wind turbines usually integrate the generator at the top of the tower or the pole, so that the weight of the entire wind turbine is concentrated on the upper end, the installation stability of the tower or the pole is difficult to ensure, and the installation and maintenance of the generator is extremely inconvenient, which has a great impact on the promotion, installation and use of small and micro wind turbines. Therefore, a new wind turbine is needed to solve the above technical problems. Utility Model Content

[0004] The technical solution adopted by the utility model to solve the technical problem is: a small and micro wind turbine with a generator placed below, comprising: a cabin, a wind propeller, a tower, and a generator. The cabin is in the shape of a spindle with a horizontal rotating shaft. The wind propeller is rotatably installed at the front end of the spindle shape of the cabin. The wind propeller drives the horizontal shaft to rotate. An active bevel gear that rotates coaxially is arranged at one end of the horizontal shaft away from the wind propeller. The tower is a hollow vertical pipe. A vertical shaft is rotatably connected inside the tower. The vertical shaft extends from top to bottom to the lower end of the tower. An upper bevel gear and a lower bevel gear of the vertical shaft that rotate coaxially are fixedly connected at the upper and lower ends of the vertical shaft respectively. The generator is arranged at the bottom of the tower. On the outside of the tower, the torque input end of the generator is fixedly connected with a coaxially rotating driven bevel gear; the active bevel gear meshes with the upper bevel gear of the vertical shaft, and the lower bevel gear of the vertical shaft meshes with the driven bevel gear; the tower is supported from bottom to top at the bottom of the nacelle; since the generator is located at the bottom of the tower, the top weight of the wind turbine is greatly reduced, and the stability of the tower is improved. When installing and using the wind turbine, the fixing strength of the tower is greatly reduced, and the material and quality requirements of the tower are reduced accordingly, which reduces the cost of production, processing and installation and fixation, and improves the cost-effectiveness of installation, use and maintenance of the wind turbine.

[0005] Preferably, the meshing portion of the lower bevel gear of the vertical shaft and the driven bevel gear is located in the cylinder wall at the bottom of the tower, and the meshing portion of the active bevel gear and the upper bevel gear of the vertical shaft is located in the cavity of the cabin; the bevel gears are meshed in the cavity or in the cylinder wall, which reduces the influence of the external environment on the gear meshing, and at the same time makes the lubrication effect of the lubricating grease at the gear meshing more lasting, thereby improving the gear transmission efficiency and service life.

[0006] Preferably, the tower is divided into multiple sections along the vertical direction, and the multiple sections are connected by flange fixed docking; the segmented docking tower makes the tower installation and maintenance more convenient, and different wind propeller frame heights can be selected and configured according to different needs of different environments, so that the wind turbine has better adaptability to the installation environment, and the flange fixed docking method ensures the safety and reliability of the axial connection.

[0007] More preferably, the vertical shaft is divided into multiple sections along the vertical direction, and two adjacent vertical shafts are coaxially torque-connected via a coupling, and the segmented positions of the tower and the segmented positions of the vertical shaft have the same corresponding heights; the vertical shaft adopts the same segmented method as the tower, so the segmented tower and the vertical shaft can be installed at the same time, making the installation, use and maintenance of the vertical shaft more convenient and reducing the production, installation and use costs of the vertical shaft.

[0008] More preferably, bearings are provided at segmented positions of the tower, the outer bushing of the bearing is embedded in the inner wall of the inner tube of the tower, and the inner bushing of the bearing is sleeved on the outer circumference of the vertical shaft or the coupling; the bearing can reduce the friction at the connection between the vertical shaft and the tower, reduce the friction loss in torque transmission, and improve the power generation efficiency.

[0009] Preferably, the bearings include: tapered roller bearings, cylindrical roller bearings, and ball roller bearings; among them, tapered roller bearings have better axial compression resistance but higher cost, while ball roller bearings have better economy but weaker axial compression resistance.

[0010] Preferably, the coupling is in the shape of a three-step stepped shaft that is thick in the middle and thin at both ends, and both ends of the coupling are fixedly connected to the inner hole at the end of the vertical shaft; the coupling is used to connect the vertical shafts at the upper and lower ends, making installation more convenient, having good centering, and smoother torque transmission.

[0011] More preferably, the two ends of the coupling are connected to the inner hole of the end of the vertical shaft through a spline coaxial torque connection; the spline can transmit greater torque, which is suitable for application scenarios with larger wind force and larger generator power.

[0012] The beneficial effects of the utility model are:

[0013] The utility model transfers the generator to the bottom of the wind propeller tower, and then arranges a vertical shaft inside the tower. The torque is transmitted from the upper end of the tower to the lower end of the tower through the cooperation of bevel gears at both ends of the shaft, so that the generator can still generate electricity as usual when it is arranged at the bottom of the tower, making the installation and use of small and micro wind turbines safer, more reliable, more convenient and faster, and solving the problems in the prior art that the stability of the tower installation is difficult to ensure and the installation and maintenance of the generator are extremely inconvenient due to the integration of the generator at the top of the tower. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional schematic diagram of a small and micro wind turbine with a generator placed below;

[0015] Figure 2 is a schematic cross-sectional view of a wind turbine generator;

[0016] Figure 3 yes Figure 2 A partial enlarged schematic diagram of

[0017] Figure 4 yes Figure 3 Schematic diagram of the explosion decomposition.

[0018] In the figure: 1, cabin; 2, wind propeller; 3, tower; 4, generator; 5, horizontal shaft; 6, active bevel gear; 7, vertical shaft; 8, upper bevel gear of vertical shaft; 9, lower bevel gear of vertical shaft; 10, driven bevel gear; 11, flange; 12, coupling; 13, bearing; 14, spline. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the relevant technologies in the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] refer to Figures 1 to 4A small and micro wind turbine with a generator mounted below comprises: a nacelle 1, a wind propeller 2, a tower 3 and a generator 4. The nacelle 1 is in the shape of a spindle with a horizontal rotating axis. The wind propeller 2 is rotatably mounted at the front end of the spindle shape of the nacelle 1. The wind propeller 2 drives the horizontal shaft 5 to rotate. The end of the horizontal shaft 5 away from the wind propeller 2 is provided with a coaxially rotating active bevel gear 6; the tower 3 is a hollow vertical tube, and a vertical shaft 7 is rotatably connected inside the tower 3. The vertical shaft 7 extends from top to bottom to the lower end of the tower 3. The upper and lower ends of the vertical shaft 7 are respectively fixedly connected with a coaxially rotating vertical shaft upper bevel gear 8 and a vertical shaft lower bevel gear 9; the generator 4 is arranged on the outer side of the bottom of the tower 3. The torque input end of 4 is fixedly connected with a driven bevel gear 10 that rotates coaxially; the active bevel gear 6 meshes with the bevel gear 8 on the vertical shaft, and the bevel gear 9 on the vertical shaft meshes with the driven bevel gear 10; the tower 3 is supported from bottom to top at the bottom of the nacelle 1; since the generator 4 is located at the bottom of the tower 3, the top weight of the wind turbine is greatly reduced, and the stability of the tower 3 is improved. When installing and using the wind turbine, the fixing strength of the tower 3 is greatly reduced, and the material and quality requirements of the tower 3 are reduced accordingly, which reduces the cost of production, processing and installation and fixing, so that the cost performance of installation, use and maintenance of the wind turbine is improved.

[0021] Furthermore, the meshing portion of the lower bevel gear 9 of the vertical shaft and the driven bevel gear 10 is located in the cylinder wall at the bottom of the tower 3, and the meshing portion of the active bevel gear 6 and the upper bevel gear 8 of the vertical shaft is located in the cavity of the nacelle 1; the bevel gears are meshed in the cavity or in the cylinder wall, which reduces the influence of the external environment on the gear meshing, and at the same time makes the lubrication effect of the lubricating grease at the gear meshing more lasting, thereby improving the gear transmission efficiency and service life.

[0022] Furthermore, the tower 3 is divided into multiple sections in the vertical direction, and the multiple sections of the tower 3 are fixedly connected by flanges 11; the segmented tower 3 makes the installation and maintenance of the tower 3 more convenient, and different wind propeller 2 heights can be selected and configured according to the different needs of different environments, so that the wind turbine has better adaptability to the installation environment, and the flange fixed docking method ensures the safety and reliability of the axial connection; at the same time, the tower 3 can also adopt a method in which each section is axially split. During installation, the vertical shaft 7 is installed first, and then each section of the semicircular groove-shaped split tower 3 is radially buckled, which will further reduce the cost of producing and installing the tower 3.

[0023] Furthermore, the vertical shaft 7 is divided into multiple sections along the vertical direction, and two adjacent vertical shafts 7 are coaxially torque-connected via a coupling 12, and the segmented positions of the tower 3 correspond to the same height as the segmented positions of the vertical shaft 7; the vertical shaft 7 adopts the same segmented method as the tower 3, so the segmented tower 3 and the vertical shaft 7 can be installed at the same time, making the installation, use and maintenance of the vertical shaft 7 more convenient, and reducing the production, installation and use costs of the vertical shaft 7.

[0024] Furthermore, bearings 13 are provided at the segmented positions of the tower 3, the outer bushing of the bearing 13 is embedded in the inner wall of the inner tube of the tower 3, and the inner bushing of the bearing 13 is sleeved on the outer circumference of the vertical shaft 7 or the coupling 12; the bearing can reduce the friction at the connection between the vertical shaft 7 and the tower 3, reduce the friction loss in torque transmission, and improve the power generation efficiency.

[0025] Furthermore, the bearing 13 includes: a tapered roller bearing, a cylindrical roller bearing, and a ball roller bearing; among them, the tapered roller bearing has better axial pressure resistance, but the cost is higher, while the ball roller bearing has better economy but weaker axial pressure resistance.

[0026] Furthermore, the coupling 12 is in the shape of a three-step stepped shaft that is thick in the middle and thin at both ends, and the two ends of the coupling 12 are fixedly connected to the inner holes at the ends of the vertical shaft 7; the coupling 12 is used to connect the vertical shafts 7 at the upper and lower ends, which makes installation more convenient, has good centering, and smoother torque transmission.

[0027] Furthermore, the two ends of the coupling 12 are coaxially torque-connected with the inner hole of the end of the vertical shaft 7 through a spline 14; the spline 14 can transmit a larger torque, which is suitable for application scenarios with larger wind force and larger power of the generator 4.

[0028] To sum up, the utility model transfers the generator to the bottom of the wind propeller tower, and then sets a vertical shaft inside the tower. The torque is transmitted from the upper end of the tower to the lower end of the tower through the cooperation of the bevel gears at both ends of the shaft, so that the generator can still generate electricity as usual when it is configured at the bottom of the tower, making the installation and use of small and micro wind turbines safer, more reliable, more convenient and faster, and solving the problems in the prior art of the difficulty in ensuring the stability of the tower installation and the great inconvenience in the installation and maintenance of the generator caused by the integration of the generator at the top of the tower. Therefore, the utility model has broad application prospects.

[0029] It should be emphasized that the above are only preferred embodiments of the present invention and do not constitute any form of limitation to the present invention. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A small and micro wind turbine with a generator mounted below, characterized in that: include: A nacelle (1), a wind propeller (2), a tower (3), and a generator (4), wherein the wind propeller (2) is rotatably mounted at the front end of the nacelle (1), the wind propeller (2) drives a horizontal shaft (5) to rotate, and an active bevel gear (6) that rotates coaxially is provided at one end of the horizontal shaft (5) away from the wind propeller (2); The tower (3) is a hollow vertical tube, and a vertical shaft (7) is rotatably connected inside the tower (3). The vertical shaft (7) extends from top to bottom to the lower end of the tower (3), and the upper and lower ends of the vertical shaft (7) are respectively fixedly connected to a vertical shaft upper bevel gear (8) and a vertical shaft lower bevel gear (9) that rotate coaxially. The generator (4) is arranged outside the bottom of the tower (3), and a torque input end of the generator (4) is fixedly connected to a coaxially rotating driven bevel gear (10); The active bevel gear (6) meshes with the upper bevel gear (8) of the vertical shaft, and the lower bevel gear (9) of the vertical shaft meshes with the driven bevel gear (10); The tower (3) is supported from bottom to top on the bottom of the nacelle (1); The meshing portion of the lower bevel gear (9) of the vertical shaft and the driven bevel gear (10) is located in the wall of the bottom of the tower (3), and the meshing portion of the active bevel gear (6) and the upper bevel gear (8) of the vertical shaft is located in the cavity of the nacelle (1); The tower (3) is divided into multiple sections along the vertical direction, and the multiple sections of the tower (3) are fixedly butt-jointed via flanges (11); The vertical shaft (7) is divided into multiple sections along the vertical direction, and two adjacent vertical shafts (7) are coaxially torque-connected via a coupling (12), and the section positions of the tower (3) correspond to the same height as the section positions of the vertical shaft (7).

2. A small and micro wind turbine with a generator mounted below according to claim 1, characterized in that: A bearing (13) is provided at a segmented position of the tower (3), an outer bushing of the bearing (13) is embedded in the inner wall of the inner cylinder of the tower (3), and an inner bushing of the bearing (13) is sleeved on the outer circumference of the vertical shaft (7) or the coupling (12).

3. A small and micro wind turbine with a generator mounted below according to claim 2, characterized in that: The bearing (13) includes: a tapered roller bearing, a cylindrical roller bearing, and a ball roller bearing.

4. A small and micro wind turbine with a generator mounted below according to claim 2, characterized in that: The coupling (12) is in the shape of a three-step stepped shaft that is thick in the middle and thin at both ends. Both ends of the coupling (12) are fixedly connected to the inner hole at the end of the vertical shaft (7).

5. A small and micro wind turbine with a generator mounted below according to claim 4, characterized in that: The two ends of the coupling (12) are coaxially torque-connected with the inner hole of the end of the vertical shaft (7) via a spline (14).

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