A vertical axis wind turbine

Abstract

This invention relates to the field of wind turbine technology, specifically a vertical axis wind turbine, comprising a frustum. A generator is fixedly connected to the center of the upper surface of the frustum, and a rain cover is provided on the outside of the generator. A drive shaft is rotatably connected to the center of the upper surface of the rain cover via a bearing, and the lower end of the drive shaft passes through the rain cover and is fixedly connected to the rotating shaft of the generator. An adjustment mechanism is provided at the center of the outer surface of the drive shaft, and four blades are equidistantly arranged in a ring on the outer side of the drive shaft on both the upper and lower sides of the adjustment mechanism. A support column is fixedly connected to the center of the lower surface of the frustum. When the wind force is too strong, the blades of this vertical axis wind turbine move closer to the drive shaft under the adjustment of the adjustment mechanism, thereby reducing the sweep area of ​​the blades and ensuring that the drive shaft maintains a relatively stable rotational speed. This avoids excessively high output voltage and frequency of the generator, thus ensuring the normal operation of the generator.

Description

Technical Field

[0001] This invention relates to the field of wind turbine technology, and in particular to a vertical axis wind turbine. Background Technology

[0002] With the development of renewable energy technologies such as wind power, vertical axis wind turbines have seen significant growth in recent years because they do not require wind-fighting devices. However, the swept area of ​​existing vertical axis wind turbine blades is generally not adjustable, making it difficult to adapt to a wide range of wind speeds.

[0003] Existing extendable vertical axis wind turbines generally include a control motor. This motor drives a lead screw to rotate, adjusting the sweeping area of ​​the blades to stabilize the power output near the rated power. Because the control motor consumes electricity, it needs to be frequently started when the wind is unstable, wasting energy.

[0004] Therefore, a vertical axis wind turbine is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide a vertical axis wind turbine to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a vertical axis wind turbine generator, comprising a frustum, wherein a generator is fixedly connected to the center of the upper surface of the frustum, and a rain cover is provided on the outside of the generator. A transmission shaft is rotatably connected to the center of the upper surface of the rain cover via a bearing, and the lower end of the transmission shaft passes through the rain cover and is fixedly connected to the rotating shaft of the generator.

[0007] An adjustment mechanism is provided at the center of the outer surface of the drive shaft, and four blades are provided equidistantly in a ring on the outer side of the drive shaft on both the upper and lower sides of the adjustment mechanism.

[0008] A support column is fixedly connected to the center of the lower end face of the frustum, and several diagonal braces are fixedly connected in a ring at equal intervals between the upper surface of the support column and the edge of the lower end face of the frustum.

[0009] Preferably, the blade is symmetrically fixedly connected to a secondary hinge seat on the side near the drive shaft, and a hinge rod is hinged to each of the secondary hinge seats.

[0010] The other end of the hinge rod is hinged to a primary hinge seat. The primary hinge seat above the upper blade is fixedly connected to the outer surface of the drive shaft, and the primary hinge seat below is slidably connected to the drive shaft. The primary hinge seat above the lower blade is slidably connected to the drive shaft, and the primary hinge seat below is fixedly connected to the outer surface of the drive shaft.

[0011] Preferably, a fan-shaped groove is symmetrically provided on the upper and lower parts of the primary hinge seat near the center of the drive shaft. The groove is equipped with a slider, and the inner sidewall of the primary hinge seat is fixedly connected to the outer sidewall of the slider.

[0012] Preferably, a spring is fixedly connected to the upper end face of the upper slider, and the upper end of the spring is fixedly connected to the upper end face of the slide groove; a spring is fixedly connected to the lower end face of the lower slider, and the lower end of the spring is fixedly connected to the lower end face of the slide groove.

[0013] Preferably, the adjusting mechanism includes a ball box, a fixed rod, and a steel ball;

[0014] The ball box has a rectangular cavity structure, and the ball box is fixedly connected to the drive shaft by a fixing rod, with the steel ball placed inside the ball box.

[0015] Preferably, the upper and lower end faces of the ball box are provided with slots that extend into the interior of the ball box, and steel strands are fixedly connected to the upper and lower sides of the steel ball, with the other end of the steel strands passing through the slots and fixedly connected to the corresponding primary hinge seats.

[0016] Preferably, ceramic gaskets are fixedly connected to the inner sidewalls of the slots.

[0017] Preferably, the ball box has a circular groove structure symmetrically opened at both the upper and lower ends, and the upper and lower ends of the steel ball are respectively located in the track.

[0018] Preferably, a fixing ring is rotatably sleeved on the outer surface of the drive shaft near the upper end face of the rain cover, and a ceramic washer is fixedly connected to the inner surface of the fixing ring;

[0019] The outer surface of the fixed ring is fixedly connected with several L-shaped rods at equal intervals, and the lower end of the L-shaped rods is fixedly connected to the upper surface of the circular platform.

[0020] Preferably, the rain cover has symmetrical vertical ventilation openings on its left and right sides, and each ventilation opening has a baffle that is vertically and equidistantly arranged at a downward tilt of 45°.

[0021] The front and rear sides of the baffle are fixedly connected to the front and rear sides of the vent, respectively, and a dustproof net is fixedly connected between two adjacent baffles, with the upper and lower ends of the dustproof net perpendicular to the baffle.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] 1. When the wind is too strong, the regulating mechanism causes the blades to move closer to the drive shaft, thereby reducing the sweeping area of ​​the blades and ensuring that the drive shaft always maintains a relatively stable speed. This avoids excessively high output voltage and frequency of the motor, thus ensuring the normal operation of the generator and preventing the need to frequently start and control the motor when the wind is unstable, saving resources and energy.

[0024] 2. A fixed ring is rotatably fitted at the lower end of the drive shaft. A ceramic washer is fixedly connected to the inner surface of the fixed ring, and several L-shaped rods are fixedly connected to the outer surface of the fixed ring at equal intervals. The lower end of the L-shaped rods is fixedly connected to the upper surface of the round platform, which ensures the stable rotation of the drive shaft.

[0025] 3. The rain cover has symmetrical vertical ventilation openings on the left and right sides. Inside each ventilation opening, there are vertically spaced baffles that are inclined downwards at 45°. A dustproof net is fixedly connected between two adjacent baffles, and the upper and lower ends of the dustproof net are perpendicular to the baffles. The ventilation openings ensure ventilation of the rain cover and prevent the internal temperature from being too high and damaging the generator. The inclined baffles can prevent rainwater from entering the rain cover, and the dustproof net can prevent sand and dust from entering the rain cover, thus extending the service life of the generator. Attached Figure Description

[0026] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 This is a perspective view of the overall structure of the present invention;

[0028] Figure 2 For the present invention Figure 1 Cross-sectional view at point AA;

[0029] Figure 3 For the present invention Figure 2 Enlarged view of point B in the image;

[0030] Figure 4 For the present invention Figure 3 Cross-sectional view at point C;

[0031] Figure 5 For the present invention Figure 3 Cross-sectional view at DD in the middle;

[0032] Figure 6 For the present invention Figure 2 Enlarged view of point E in the image.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1. Frustum; 11. Diagonal brace; 12. Support column; 2. Generator; 21. Rain cover; 22. Vent; 23. Dustproof net; 24. Baffle; 3. Fixing ring; 31. L-shaped rod; 32. Ceramic washer; 4. Drive shaft; 41. Primary hinge seat; 42. Hinge rod; 43. Secondary hinge seat; 44. Blade; 45. Slide groove; 46. Slider; 47. Spring; 5. Adjustment mechanism; 51. Ball box; 511. Fixing rod; 512. Steel ball; 513. Track; 52. Steel strand; 521. Groove; 522. Ceramic gasket. Detailed Implementation

[0035] 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 some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Please see Figures 1 to 6 The present invention provides a technical solution:

[0037] A vertical axis wind turbine includes a frustum 1. A generator 2 is fixedly connected to the center of the upper surface of the frustum 1, and a rain cover 21 is provided on the outside of the generator 2. A drive shaft 4 is rotatably connected to the center of the upper surface of the rain cover 21 via a bearing. The lower end of the drive shaft 4 passes through the rain cover 21 and is fixedly connected to the rotating shaft of the generator 2. An adjustment mechanism 5 is provided at the center of the outer surface of the drive shaft 4, and four blades 44 are equidistantly arranged in an annular pattern on the outer side of the drive shaft 4 on both the upper and lower sides of the adjustment mechanism 5. A support column 12 is fixedly connected to the center of the lower surface of the frustum 1, and several diagonal braces 11 are equidistantly connected in an annular pattern between the upper side of the outer surface of the support column 12 and the edge of the lower surface of the frustum 1.

[0038] During operation, under the influence of wind, the blades 44 drive the drive shaft 4 to rotate, which in turn drives the rotating shaft of the generator 2 to rotate, thereby generating electricity. When the wind is too strong, the adjustment mechanism 5 can be used to move the blades 44 closer to the drive shaft 4, thereby reducing the sweep area of ​​the blades 44 and thus reducing the speed of the drive shaft 4. This ensures that the drive shaft 4 maintains a relatively stable speed, preventing the output voltage and frequency of the motor from being too high, and thus ensuring the normal operation of the generator 2. The frustum 1 and the support column 12 are reinforced and fixed by the diagonal brace 11 to ensure the stability of the generator 2 and the drive shaft 4. The double-layer blades 44 improve the area utilization of the wind field compared to the single-layer blades 44, and can achieve a faster speed when the wind is weak, thereby increasing the power generation of the generator 2.

[0039] As one embodiment of the present invention, such as Figures 2 to 5 As shown, the blade 44 is symmetrically and fixedly connected to a secondary hinge seat 43 on one side near the drive shaft 4, and a hinge rod 42 is hinged to each secondary hinge seat 43. The other end of each hinge rod 42 is hinged to a primary hinge seat 41. The primary hinge seat 41 above the upper blade 44 is fixedly connected to the outer surface of the drive shaft 4, and the primary hinge seat 41 below is slidably connected to the drive shaft 4. Similarly, the primary hinge seat 41 above the lower blade 44 is slidably connected to the drive shaft 4, and the primary hinge seat 41 below is fixedly connected to the outer surface of the drive shaft 4. A fan-shaped groove 45 is symmetrically opened on the primary hinge seat 41 near the center of the drive shaft 4. A slider 46 is fitted to the groove 45. The inner sidewall of the primary hinge seat 41 is fixedly connected to the outer sidewall of the slider 46. A spring 47 is fixedly connected to the upper end face of the upper slider 46, and the upper end of the spring 47 is connected to the upper end face of the groove 45. The lower end face of the slider 46 is fixedly connected to a spring 47, and the lower end of the spring 47 is fixedly connected to the lower end face of the slide groove 45. The adjustment mechanism 5 includes a ball box 51, a fixed rod 511, and a steel ball 512. The ball box 51 is a rectangular cavity structure, and the ball box 51 is fixedly connected to the drive shaft 4 through the fixed rod 511. The steel ball 512 is placed inside the ball box 51. The center positions of the upper and lower end faces of the ball box 51 are provided with slots 521 that penetrate into the interior of the ball box 51. The upper and lower sides of the steel ball 512 are respectively fixedly connected with steel strands 52, and the other end of the steel strands 52 passes through the slots 521 and is fixedly connected to the corresponding first-stage hinge seat 41. Ceramic gaskets 522 are fixedly connected to the inner side walls of the slots 521. The upper and lower end faces of the ball box 51 are symmetrically provided with circular groove structures of track 513, and the upper and lower ends of the steel ball 512 are respectively located in the track 513.

[0040] During operation, the ball box 51 is fixedly connected to the drive shaft 4 via the fixed rod 511, causing the steel balls 512 inside the ball box 51 to move in a circular motion along with the drive shaft 4. When the wind force is too strong, the drive shaft 4 rotates too fast, causing the steel balls 512 to slide outward along the track 513 under the action of centrifugal force. The steel strands 52 on the upper and lower sides of the steel balls 512 also move accordingly. Since the other ends of the steel strands 52 pass through the slots 521 and are fixedly connected to the corresponding primary hinge seats 41, the blades 44 are symmetrically fixedly connected to secondary hinge seats 43 on the side closest to the drive shaft 4. Hinge rods 42 are hinged to the secondary hinge seats 43, and the other ends of the hinge rods 42 are hinged to primary hinge seats 41. The primary hinge seat 41 above the upper blade 44 is fixedly connected to the outer surface of the drive shaft 4, and the primary hinge seat 41 below is fixedly connected to the outer surface of the slider 46 in the upper slide groove 45. The primary hinge seat 41 above the lower blade 44 is also fixedly connected to the lower... The outer side of the slider 46 in the side slide groove 45 is fixedly connected, and the lower first-stage hinge seat 41 is fixedly connected to the outer surface of the drive shaft 4. This pulls the corresponding first-stage hinge seats 41 between the upper and lower blades 44 closer together, thereby driving the upper and lower blades 44 closer to the drive shaft 4. Since the upper end face of the upper slider 46 is fixedly connected to the spring 47, and the upper end of the spring 47 is fixedly connected to the upper end face of the slide groove 45, and the lower end face of the lower slider 46 is fixedly connected to the spring 47, and the lower end of the spring 47 is fixedly connected to the lower end face of the slide groove 45, the steel ball 512 is kept in balance under the elastic force of the spring 47, thereby ensuring that the drive shaft 4 always maintains a stable speed, avoiding excessive output voltage and frequency of the motor, and thus ensuring the normal operation of the generator 2. The ceramic gasket 522 fixedly connected to the inner side of the slot 521 can reduce the wear between the steel strand 52 and the slot 521 and extend the service life of the steel strand 52.

[0041] As one embodiment of the present invention, such as Figure 2 and Figure 6 As shown, a fixing ring 3 is rotatably sleeved on the outer surface of the drive shaft 4 near the upper end face of the rain cover 21, and a ceramic washer 32 is fixedly connected to the inner surface of the fixing ring 3. Several L-shaped rods 31 are fixedly connected to the outer surface of the fixing ring 3 at equal intervals, and the lower end of the L-shaped rods 31 is fixedly connected to the upper end face of the frustum 1.

[0042] During operation, based on the above embodiment, the lower end of the drive shaft 4 always rotates within the fixed ring 3. The ceramic washer 32 can reduce the wear between the drive shaft 4 and the fixed ring 3. The fixed ring 3 is fixedly connected to the frustum 1 through the L-shaped rod 31, which improves the stability of the drive shaft 4.

[0043] As one embodiment of the present invention, such as Figure 2 and Figure 6As shown, the rain cover 21 has symmetrical vertical ventilation openings 22 on its left and right sides, and each ventilation opening 22 has a baffle 24 that is vertically inclined downward at 45° and equidistantly arranged inside. The front and rear sides of the baffle 24 are fixedly connected to the front and rear sides inside the ventilation opening 22, and a dustproof net 23 is fixedly connected between two adjacent baffles 24, and the upper and lower ends of the dustproof net 23 are perpendicular to the baffle 24.

[0044] During operation, based on the above embodiment, the baffle 24 tilted downward at 45° can prevent rainwater from entering the rain cover 21 through the vent 22. A dustproof net 23 is fixedly connected between two adjacent baffles 24, and the upper and lower ends of the dustproof net 23 are perpendicular to the baffle 24, so that the dustproof net 23 is also tilted. After the dust in the air is blocked by the dustproof net 23, it can fall downward under the action of the vibration force generated by the generator 2, thereby ensuring the smooth ventilation of the vent 22 and extending the service life of the generator 2.

[0045] Working principle: Under the action of wind, the blades 44 drive the drive shaft 4 to rotate, which in turn drives the rotating shaft of the generator 2 to rotate, thereby driving the generator 2 to generate electricity. When the wind force is too strong, since the ball box 51 is fixedly connected to the drive shaft 4 through the fixed rod 511, the steel ball 512 inside the ball box 51 will move in a circular motion along with the drive shaft 4. When the wind force is too strong, the speed of the drive shaft 4 is too fast, causing the steel ball 512 to slide outward along the track 513 under the action of centrifugal force. Then the steel strands 52 on the upper and lower sides of the steel ball 512 also move accordingly. Since the other end of the steel strands 52 passes through the slot 521 and is fixedly connected to the corresponding first-stage hinge seat 41, the blades 44 are close to the drive shaft 4. Two-stage hinge seats 43 are symmetrically fixedly connected to the upper and lower sides. Hinge rods 42 are hinged to each of the two-stage hinge seats 43, and primary hinge seats 41 are hinged to the other ends of the hinge rods 42. The primary hinge seat 41 above the upper blade 44 is fixedly connected to the outer surface of the drive shaft 4, and the primary hinge seat 41 below is fixedly connected to the outer surface of the slider 46 in the upper slide groove 45. Similarly, the primary hinge seat 41 above the lower blade 44 is fixedly connected to the outer surface of the slider 46 in the lower slide groove 45, and the primary hinge seat 41 below is fixedly connected to the outer surface of the drive shaft 4. This pulls the corresponding primary hinge seats 41 between the upper and lower blades 44 closer together, thereby causing the upper and lower blades 44 to move closer together. Near the drive shaft 4, because the upper end face of the upper slider 46 is fixedly connected to the spring 47, and the upper end of the spring 47 is fixedly connected to the upper end face of the slide groove 45, and the lower end face of the lower slider 46 is fixedly connected to the spring 47, and the lower end of the spring 47 is fixedly connected to the lower end face of the slide groove 45, the steel ball 512 is kept in balance under the elastic force of the spring 47, thereby ensuring that the drive shaft 4 always maintains a stable speed, avoiding excessively high output voltage and frequency of the motor, and thus ensuring the normal operation of the generator 2. The ceramic gasket 522 fixedly connected to the inner side of the slot 521 can reduce the wear between the steel strand 52 and the slot 521, and extend the service life of the steel strand 52. The end always rotates within the fixed ring 3. The ceramic washer 32 can reduce the wear between the drive shaft 4 and the fixed ring 3. The fixed ring 3 is fixedly connected to the frustum 1 through the L-shaped rod 31, which improves the stability of the drive shaft 4. The baffle 24 tilted downward at 45° can prevent rainwater from entering the rain cover 21 through the vent 22. A dustproof net 23 is fixedly connected between two adjacent baffles 24, and the upper and lower ends of the dustproof net 23 are perpendicular to the baffle 24, so that the dustproof net 23 is also tilted. After the dust in the air is blocked by the dustproof net 23, it can fall downward under the action of the vibration force generated by the generator 2, thereby ensuring the smooth ventilation of the vent 22 and extending the service life of the generator 2.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A vertical axis wind turbine generator, comprising a frustum (1), characterized in that: A generator (2) is fixedly connected to the center of the upper end face of the truncated cone (1), and a rain cover (21) is provided on the outside of the generator (2). A transmission shaft (4) is rotatably connected to the center of the upper end face of the rain cover (21) through a bearing, and the lower end of the transmission shaft (4) passes through the rain cover (21) and is fixedly connected to the rotating shaft of the generator (2). An adjustment mechanism (5) is provided at the center of the outer surface of the transmission shaft (4), and four blades (44) are provided at equal intervals in a ring on the outer side of the transmission shaft (4) on both the upper and lower sides of the adjustment mechanism (5). A support column (12) is fixedly connected to the center of the lower end face of the truncated cone (1), and several diagonal braces (11) are fixedly connected at equal intervals in a ring between the upper side of the outer surface of the support column (12) and the edge of the lower end face of the truncated cone (1). The blade (44) is symmetrically connected to a secondary hinge seat (43) on one side near the drive shaft (4), and a hinge rod (42) is hinged to the secondary hinge seat (43) respectively; the other end of the hinge rod (42) is hinged to a primary hinge seat (41), and the primary hinge seat (41) above the upper blade (44) is fixedly connected to the outer surface of the drive shaft (4), and the primary hinge seat (41) below the lower blade (44) is slidably connected to the drive shaft (4), and the primary hinge seat (41) above the lower blade (44) is slidably connected to the drive shaft (4), and the primary hinge seat (41) below the lower blade (44) is fixedly connected to the outer surface of the drive shaft (4); Near the center of the drive shaft (4), a fan-shaped groove (45) is symmetrically opened on the upper and lower sides of the first-stage hinge seat (41). The groove (45) is equipped with a slider (46). The inner sidewall of the first-stage hinge seat (41) is fixedly connected to the outer sidewall of the slider (46). A spring (47) is fixedly connected to the upper end face of the upper slider (46), and the upper end of the spring (47) is fixedly connected to the upper end face of the slide groove (45). A spring (47) is fixedly connected to the lower end face of the lower slider (46), and the lower end of the spring (47) is fixedly connected to the lower end face of the slide groove (45). The adjustment mechanism (5) includes a ball box (51), a fixing rod (511), and a steel ball (512); the ball box (51) is a rectangular cavity structure, and the ball box (51) is fixedly connected to the drive shaft (4) through the fixing rod (511); the steel ball (512) is placed inside the ball box (51). The upper and lower end faces of the ball box (51) are provided with slots (521) that penetrate into the interior of the ball box (51) at the center position. The upper and lower sides of the steel ball (512) are respectively fixedly connected with steel strands (52), and the other end of the steel strands (52) passes through the slots (521) and is fixedly connected to the corresponding first-level hinge seat (41). The ball box (51) has a circular groove structure track (513) symmetrically opened at both the upper and lower ends, and the upper and lower ends of the steel ball (512) are respectively located in the track (513).

2. A vertical axis wind turbine generator according to claim 1, characterized in that: Ceramic gaskets (522) are fixedly connected to the inner wall of each slot (521).

3. A vertical axis wind turbine generator according to claim 1, characterized in that: The outer surface of the drive shaft (4) near the upper end face of the rain cover (21) is fitted with a fixed ring (3), and a ceramic washer (32) is fixedly connected to the inner surface of the fixed ring (3); a number of L-shaped rods (31) are fixedly connected to the outer surface of the fixed ring (3) at equal intervals, and the lower end of the L-shaped rods (31) is fixedly connected to the upper end face of the frustum (1).

4. A vertical axis wind turbine generator according to claim 1, characterized in that: The rain cover (21) has symmetrical vertical ventilation openings (22) on its left and right sides, and each ventilation opening (22) has a baffle (24) that is vertically and equidistantly arranged at a downward inclination of 45° inside. The front and rear sides of the baffle (24) are fixedly connected to the front and rear sides inside the ventilation opening (22), and a dustproof net (23) is fixedly connected between two adjacent baffles (24), and the upper and lower ends of the dustproof net (23) are perpendicular to the baffle (24).

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