Small wind driven generator

Abstract

The utility model discloses a small-sized wind driven generator which comprises a mounting base, a machine shell is fixedly mounted at the top of the mounting base, a sliding rail is fixedly mounted at the inner bottom of the machine shell, a wind driven generator body is arranged in the machine shell, a sliding block is fixedly connected to the bottom of the wind driven generator body, and the sliding block is arranged on the sliding rail in a sliding mode. An electric push rod is fixedly installed at the inner bottom of the machine shell, a connecting plate is fixedly connected to the side face of the sliding block, the end of a piston rod of the electric push rod is fixedly connected with one side of the connecting plate, and a first permanent magnetic disc is fixedly connected to a rotating shaft of the wind driven generator body; the end, away from the machine shell, of the transmission shaft is fixedly provided with blades, the end, close to the machine shell, of the transmission shaft is fixedly connected with a second permanent magnetic disc, and the first permanent magnetic disc and the second permanent magnetic disc form a magnetic coupler. According to the wind driven generator, the phenomenon that the wind driven generator body is burnt out when the blades rotate quickly can be effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of small wind generators, in particular to a small wind generator. Background Art

[0002] Common small wind turbines are mainly composed of a guide cover, wind rotor blades, blade mounting seat, generator, housing, rotating body and tail rudder. The working principle of the wind turbine is: when the wind blows, the wind acts on the blades and drives the wind rotor blades to rotate. The blade mounting seat is directly connected to the rotating shaft of the generator, that is, the wind rotor blades directly drive the generator rotor to generate electricity.

[0003] In windy weather, if the speed of the wind rotor blades is too high, the high-speed rotating wind rotor blades will drive the generator rotor to rotate rapidly, which will cause excessive current in the generator, causing the motor to overheat or even burn out.

[0004] A Chinese patent with announcement number CN211202200U discloses a braking device for a wind turbine, including a support column, a generator box is fixedly connected to the upper end of the support column, a generator is installed inside the generator box, a head is provided on one side of the generator box, a plurality of evenly distributed wind wheels are fixedly connected to the outer end of the head, a rotating shaft is fixedly connected to the end of the head close to the generator box, the end of the rotating shaft extends into the interior of the generator box and is connected to the generator, a ring sleeve is provided between the generator box and the head, the ends of the ring sleeve and the generator box close to each other are fixedly connected to each other, the rotating shaft is located on the inner side of the ring sleeve, and a pair of main annular plates symmetrical about the rotating shaft are provided on the inner side of the ring sleeve.

[0005] The above-mentioned brake device for wind turbine generator can realize the function of slowing down the rotating shaft through the sliding friction between the friction plate and the friction ring, thereby reducing the situation of runaway caused by excessive rotation speed, and is suitable for small and medium-sized wind turbine generators.

[0006] However, when the above-mentioned wind turbine brake device is in use, the sliding friction between the friction plate and the friction ring can achieve the function of slowing down the rotating shaft. However, in some extremely windy weather, the sliding friction between the friction plate and the friction ring alone cannot effectively reduce the rotation speed of the generator's rotating shaft, and the generator may still burn out.

[0007] Therefore, a small wind turbine is proposed. Utility Model Content

[0008] The purpose of the utility model is to provide a small wind turbine generator, so as to solve or at least alleviate one or more of the above-mentioned problems and other problems existing in the prior art.

[0009] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a small wind turbine, comprising a mounting seat, a casing is fixedly mounted on the top of the mounting seat, a slide rail is fixedly mounted on the inner bottom of the casing, a wind turbine body is arranged inside the casing, a slider is fixedly connected to the bottom of the wind turbine body, the slider is slidably arranged on the slide rail, an electric push rod is fixedly mounted on the inner bottom of the casing, a connecting plate is fixedly connected to the side of the slider, a piston rod end of the electric push rod is fixedly connected to one side of the connecting plate, a first permanent magnetic disk is fixedly connected to the rotating shaft of the wind turbine body, a transmission shaft is rotatably mounted on one side of the casing, a blade is fixedly mounted on one end of the transmission shaft away from the casing, a second permanent magnetic disk is fixedly connected to one end of the transmission shaft close to the casing, and the first permanent magnetic disk and the second permanent magnetic disk constitute a magnetic coupler.

[0010] In a small wind turbine according to the utility model, optionally, a speed measuring protrusion is fixedly connected to one end of the transmission shaft close to the second permanent magnet disk, an eddy current speed measuring probe for monitoring the rotational speed of the transmission shaft is fixedly installed on the inner top of the casing, a controller is fixedly installed inside the casing, the eddy current speed measuring probe is electrically connected to the signal input end of the controller, and the electric push rod is controlled by the controller.

[0011] In a small wind turbine according to the utility model, optionally, a reduction mechanism is arranged at the top of the mounting seat near one end of the transmission shaft, and the reduction mechanism includes two vertical plates, and the two vertical plates are respectively fixedly mounted on the top of the mounting seat, and the vertical plates are respectively arranged on both sides of the transmission shaft, and a screw rod is rotatably connected between the two vertical plates, and both ends of the screw rod are threadedly rotatably connected to a moving seat, an arc-shaped friction plate is fixedly connected to the upper end of the moving seat, a friction ring is fixedly connected to the transmission shaft, the arc-shaped friction plate can be in friction contact with the friction ring, and a driving mechanism for driving the screw rod to rotate is arranged at one end of the screw rod.

[0012] In a small wind turbine according to the utility model, optionally, the threads at both ends of the screw rod have opposite rotation directions.

[0013] In a small wind turbine according to the utility model, optionally, the driving mechanism includes a driving motor, a worm and a worm wheel, the driving motor is fixedly mounted on the bottom of the mounting seat, the worm wheel is fixedly connected to one end of the lead screw, the lower end of the worm is fixedly connected to the rotating shaft of the driving motor, the upper end of the worm rotates through the mounting seat and then meshes with the worm wheel, and the driving motor is controlled by the controller.

[0014] In a small wind turbine according to the utility model, optionally, a guide rod is fixedly connected between the two vertical plates, and the two movable seats are slidably sleeved on the guide rod.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The utility model provides an electric push rod, a slider, a slide rail, a connecting plate, a second permanent magnetic disk and a first permanent magnetic disk. When the transmission shaft rotates too fast and cannot be decelerated, the piston rod of the electric push rod is controlled to extend, thereby increasing the distance between the second permanent magnetic disk and the first permanent magnetic disk, so that the rotating second permanent magnetic disk cannot drive the first permanent magnetic disk to rotate, thereby effectively avoiding the phenomenon of burning the wind turbine body when the blades rotate rapidly.

[0017] By setting up the speed reduction mechanism, the transmission shaft can be frictionally slowed down when the wind force is strong but the speed of the transmission shaft is controllable, so that the wind turbine body can generate electricity normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of a small wind turbine generator of the utility model;

[0019] Figure 2 It is a partial structural schematic diagram of a small wind turbine generator of the utility model;

[0020] Figure 3 It is a partial structural schematic diagram of a small wind turbine generator of the utility model;

[0021] Figure 4 for Figure 1 Enlarged view of part A in .

[0022] In the figure: 1. mounting base; 2. housing; 3. transmission shaft; 4. blades; 5. speed reduction mechanism; 501. driving motor; 502. vertical plate; 503. worm; 504. worm wheel; 505. lead screw; 506. guide rod; 507. moving base; 508. arc-shaped friction plate; 509. friction ring; 6. second permanent magnetic disk; 7. first permanent magnetic disk; 8. wind turbine body; 9. eddy current speed measuring probe; 10. speed measuring protrusion; 11. controller; 12. slider; 13. slide rail; 14. connecting plate; 15. electric push rod. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of 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 in 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.

[0024] Example 1

[0025] See also Figures 1 to 4 This embodiment provides a small wind turbine generator, which has a smaller overall size than a large wind turbine generator, a rated power of 10 kilowatts or less, and a size of:

[0026] Blade diameter: between 1.15m and 1.16m.

[0027] Weight: Approximately between 5.85 kg and 6.3 kg.

[0028] Shipping package dimensions: approx. 770 x 410 x 200 mm.

[0029] Rated wind speed: between 10m / s and 20m / s.

[0030] Starting wind speed: can be as low as 1.5 m / s.

[0031] Noise: During operation, the noise level can be as low as 40 decibels.

[0032] Power generation: The monthly power generation can reach 30 kilowatt-hours.

[0033] The maximum wind speed that can be tolerated is generally 50 meters per second.

[0034] This small wind turbine is suitable for use in areas with abundant wind resources. It has the characteristics of small size, easy installation and strong portability.

[0035] Specifically, it includes a mounting base 1, a casing 2 is fixedly mounted on the top of the mounting base 1, a slide rail 13 is fixedly mounted on the inner bottom of the casing 2, a wind turbine body 8 is arranged inside the casing 2, a slider 12 is fixedly connected to the bottom of the wind turbine body 8, the slider 12 is slidably arranged on the slide rail 13, an electric push rod 15 is fixedly mounted on the inner bottom of the casing 2, a connecting plate 14 is fixedly connected to the side of the slider 12, a piston rod end of the electric push rod 15 is fixedly connected to one side of the connecting plate 14, a first permanent magnetic disk 7 is fixedly connected to the rotating shaft of the wind turbine body 8, a transmission shaft 3 is rotatably mounted on one side of the casing 2, a blade 4 is fixedly mounted on the end of the transmission shaft 3 away from the casing 2, a second permanent magnetic disk 6 is fixedly connected to the end of the transmission shaft 3 close to the casing 2, and the first permanent magnetic disk 7 and the second permanent magnetic disk 6 constitute a magnetic coupler.

[0036] By adopting the above technical solution, in an extremely windy weather environment, when the rotation speed of the transmission shaft 3 is too fast, the piston rod of the electric push rod 15 is controlled to extend, thereby increasing the distance between the second permanent magnetic disk 6 and the first permanent magnetic disk 7, so that the rotating second permanent magnetic disk 6 cannot drive the first permanent magnetic disk 7 to rotate, thereby effectively avoiding the phenomenon of burning the wind turbine body 8 when the blades 4 rotate rapidly.

[0037] Example 2

[0038] The difference between this embodiment and embodiment 1 lies in that: a speed measuring protrusion 10 is fixedly connected to one end of the transmission shaft 3 close to the second permanent magnet disk 6, an eddy current speed measuring probe 9 for monitoring the rotational speed of the transmission shaft 3 is fixedly installed on the inner top of the casing 2, a controller 11 is fixedly installed inside the casing 2, the eddy current speed measuring probe 9 is electrically connected to the signal input end of the controller 11, the electric push rod 15 is controlled by the controller 11, and in this embodiment, the controller 11 adopts a DSP controller.

[0039] The rotation speed of the transmission shaft 3 can be monitored in real time by the set eddy current speed measuring probe 9 and the speed measuring protrusion 10. When the rotation speed of the transmission shaft 3 exceeds the set threshold, the controller 11 controls the piston rod of the electric push rod 15 to extend, thereby increasing the distance between the second permanent magnetic disk 6 and the first permanent magnetic disk 7, so that the rotating second permanent magnetic disk 6 cannot drive the first permanent magnetic disk 7 to rotate. When the rotation speed of the transmission shaft 3 is reduced to the normal operating speed, the controller 11 controls the piston rod of the electric push rod 15 to retract, thereby resetting the distance between the second permanent magnetic disk 6 and the first permanent magnetic disk 7, so that the second permanent magnetic disk 6 and the first permanent magnetic disk 7 re-form a magnetic coupler, and then the rotating transmission shaft 3 drives the rotating shaft of the wind turbine body 8 to continue to rotate through the magnetic coupler.

[0040] Example 3

[0041] The difference between this embodiment and embodiment 2 is that a speed reduction mechanism 5 is arranged at one end of the top of the mounting seat 1 close to the transmission shaft 3, and the speed reduction mechanism 5 includes two vertical plates 502, and the two vertical plates 502 are respectively fixedly mounted on the top of the mounting seat 1, and the vertical plates 502 are respectively arranged on both sides of the transmission shaft 3. A screw rod 505 is rotatably connected between the two vertical plates 502, and both ends of the screw rod 505 are threadedly rotatably connected to a moving seat 507, and the threads at both ends of the screw rod 505 are in opposite directions. Through this arrangement, the two moving seats 507 can move towards or in opposite directions at the same time. In order to ensure that the moving seat 507 can move smoothly, a guide rod 506 is fixedly connected between the two vertical plates 502. The movable seats 507 are all slidably sleeved on the guide rods 506, and the upper end of the movable seat 507 is fixedly connected with an arc-shaped friction plate 508, and the transmission shaft 3 is fixedly connected with a friction ring 509, and the arc-shaped friction plate 508 can be in friction contact with the friction ring 509. One end of the screw rod 505 is provided with a driving mechanism for driving the screw rod 505 to rotate, and the driving mechanism includes a driving motor 501, a worm 503 and a worm wheel 504. The driving motor 501 is fixedly installed at the bottom of the mounting seat 1, and the worm wheel 504 is fixedly connected to one end of the screw rod 505. The lower end of the worm 503 is fixedly connected to the rotating shaft of the driving motor 501, and the upper end of the worm 503 rotates through the mounting seat 1 and then meshes with the worm wheel 504.

[0042] By adopting the above technical solution, when the wind force is strong but the speed of the transmission shaft 3 is controllable, the drive motor 501 is started, and the screw 505 is driven to rotate by the worm 503 and the worm wheel 504, thereby driving the two moving seats 507 to move toward the direction close to the transmission shaft 3, so that the arc-shaped friction plate 508 contacts and rubs with the friction ring 509 on the transmission shaft 3, thereby reducing the speed of the transmission shaft 3 to a normal speed.

[0043] Parts not involved in the present invention are the same as the prior art or can be implemented by the prior art. Although the embodiments of the present invention have been shown and described, it is understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A small wind turbine, characterized in that: It includes a mounting seat, a casing is fixedly mounted on the top of the mounting seat, a slide rail is fixedly mounted on the inner bottom of the casing, a wind turbine body is arranged inside the casing, a slider is fixedly connected to the bottom of the wind turbine body, the slider is slidably arranged on the slide rail, an electric push rod is fixedly mounted on the inner bottom of the casing, a connecting plate is fixedly connected to the side of the slider, a piston rod end of the electric push rod is fixedly connected to one side of the connecting plate, a first permanent magnetic disk is fixedly connected to the rotating shaft of the wind turbine body, a transmission shaft is rotatably mounted on one side of the casing, a blade is fixedly mounted on one end of the transmission shaft away from the casing, a second permanent magnetic disk is fixedly connected to one end of the transmission shaft close to the casing, and the first permanent magnetic disk and the second permanent magnetic disk constitute a magnetic coupler.

2. A small wind turbine according to claim 1, characterized in that: A speed measuring protrusion is fixedly connected to one end of the transmission shaft close to the second permanent magnet disk, an eddy current speed measuring probe for monitoring the rotational speed of the transmission shaft is fixedly installed on the inner top of the casing, a controller is fixedly installed inside the casing, the eddy current speed measuring probe is electrically connected to the signal input end of the controller, and the electric push rod is controlled by the controller.

3. A small wind turbine according to claim 2, characterized in that: A reduction mechanism is arranged at the top of the mounting seat near one end of the transmission shaft, and the reduction mechanism includes two vertical plates, which are respectively fixedly mounted on the top of the mounting seat, and the vertical plates are respectively arranged on both sides of the transmission shaft, a screw rod is rotatably connected between the two vertical plates, and both ends of the screw rod are threadedly rotatably connected to a moving seat, an arc-shaped friction plate is fixedly connected to the upper end of the moving seat, a friction ring is fixedly connected to the transmission shaft, the arc-shaped friction plate can be in friction contact with the friction ring, and a driving mechanism for driving the screw rod to rotate is arranged at one end of the screw rod.

4. A small wind turbine according to claim 3, characterized in that: The threads at both ends of the screw rod have opposite rotation directions.

5. A small wind turbine according to claim 3, characterized in that: The driving mechanism includes a driving motor, a worm and a worm wheel. The driving motor is fixedly mounted on the bottom of the mounting seat. The worm wheel is fixedly connected to one end of the lead screw. The lower end of the worm is fixedly connected to the rotating shaft of the driving motor. The upper end of the worm rotates through the mounting seat and then meshes with the worm wheel. The driving motor is controlled by the controller.

6. A small wind turbine according to claim 5, characterized in that: A guide rod is fixedly connected between the two vertical plates, and the two movable seats are slidably sleeved on the guide rod.

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