CN111927704A

CN111927704A - Low-wind-resistance wind driven generator with variable fan blade angle

Info

Publication number: CN111927704A
Application number: CN202010793560.2A
Authority: CN
Inventors: 王正阳
Original assignee: Wuhu Laiyu New Energy Technology Co ltd
Current assignee: Wuhu Laiyu New Energy Technology Co ltd
Priority date: 2020-08-10
Filing date: 2020-08-10
Publication date: 2020-11-13

Abstract

The invention discloses a low-wind-resistance wind driven generator with a variable fan blade angle, and relates to the technical field of wind power generation. The invention includes a generator compartment; a mounting plate is fixed in the generator cabin; the mounting plate is rotatably connected with a transmission shaft; the mounting plate is connected with a fixed arc plate and an adjusting arc plate which can be spliced into a complete circular ring plate; the inner walls of the fixed arc plate and the adjusting arc plate are respectively provided with a first channel and a second channel; the end part of the transmission shaft is arrayed with a fixed sleeve; a guide sleeve is fixed at the end part of the fixed sleeve; the fixed sleeve is rotationally connected with a connecting shaft, and a gear and fan blades are fixed on the connecting shaft; a guide rod is arranged in the guide sleeve; the guide rod is fixed with a rack meshed with the gear; the guide rod is connected with a roller through a fixed rod. According to the invention, the second channel on the inner wall of the arc plate is adjusted to drive the roller to ascend, and the rack and the gear are meshed to enable the connecting shaft to rotate, so that the fan blades are adjusted to be in a horizontal state, the wind resistance of the fan blades is effectively reduced, and the wind energy utilization rate and the power generation efficiency are improved.

Description

Low-wind-resistance wind driven generator with variable fan blade angle

Technical Field

The invention belongs to the technical field of wind power generation, and particularly relates to a low-wind-resistance wind driven generator with a variable fan blade angle.

Background

Most of the existing wind driven generators adopt high towers and large blades, and the wind power and the inclination of the windward side of the blades generate thrust to drive the generator to rotate, such as a horizontal shaft wind driven generator, but the wind driven generator in the form has a complex structure and a low wind energy utilization rate.

The conventional vertical axis wind driven generator has the advantages that the transmission shaft is arranged vertical to the ground, and blades connected with the transmission shaft are in a windward state in the process of performing circular rotation on a horizontal plane, so that certain resistance is generated to the rotation of the transmission shaft.

Therefore, under the condition of relatively low wind speed, the fan blades drive the transmission shaft to rotate difficultly or the rotating speed required by power generation is difficult to achieve due to the existence of fan blade wind resistance, and the utilization rate of wind energy and the power generation efficiency are seriously influenced.

Therefore, it is highly desirable to improve the conventional vertical axis generator to reduce the resistance generated by the blades during the rotation process, thereby improving the wind energy utilization and the power generation efficiency.

Disclosure of Invention

The invention aims to provide a low-wind-resistance wind driven generator with a variable fan blade angle.

In order to solve the technical problems, the invention is realized by the following technical scheme:

the invention relates to a low-wind-resistance wind driven generator with variable fan blade angles, which comprises a tower barrel; the upper end of the tower barrel is rotatably connected with a generator room; the inner wall of the generator cabin is fixedly connected with a mounting plate; the inner bottom surface of the generator cabin is fixedly connected with a generator; the mounting plate is rotatably connected with a transmission shaft; the upper surface of the mounting plate is fixedly connected with a fixed arc plate; the upper surface of the mounting plate is movably connected with an adjusting arc plate; the mounting plate is fixedly connected with a telescopic device, and a telescopic end of the telescopic device is connected with the side wall of the adjusting arc plate; the upper surface of the mounting plate is fixedly connected with an annular guide rail which is concentric with the transmission shaft; the fixed arc plate and the adjusting arc plate are spliced into a complete circular plate, and the cross sections of the fixed arc plate and the adjusting arc plate are semicircular ring structures; a first channel is formed in the inner wall of the fixed circular arc plate; the inner top surfaces of the two ends of the first channel are provided with upper chamfers; a second channel is formed in the inner wall of the adjusting circular arc plate, and the second channel and the first channel are spliced into a complete annular channel; lower chamfers are arranged on the inner bottom surfaces of the two ends of the second channel; the lower end of the transmission shaft is connected with a generator; the circumference array of the upper end of the transmission shaft is provided with a horizontally arranged fixed sleeve; the outer wall of the end part of the fixed sleeve is fixedly connected with a guide sleeve; the inner wall of the fixed sleeve is rotatably connected with a connecting shaft; the side surface of the periphery of the connecting shaft is fixedly connected with a gear; one end of the connecting shaft is fixedly connected with a fan blade; the side wall of the guide sleeve is provided with a meshing notch at a position corresponding to the gear; a straight notch is axially formed in the side wall of the guide sleeve; a guide rod is in clearance fit in the guide sleeve; the lower end of the guide sleeve is fixedly connected with a sliding block matched with the annular guide rail; the side wall of the guide rod is provided with a rectangular notch, and a rack meshed with the gear is fixedly connected in the rectangular notch; the side wall of the guide rod is fixedly connected with a fixed rod in clearance fit with the straight notch; the end part of the fixed rod is rotatably connected with a roller matched with the second channel and the first channel.

Further, the lower surface of the generator room is fixedly connected with a connecting cylinder which is rotatably connected with the inner wall of the tower cylinder; the inner wall of the connecting cylinder is fixedly connected with a toothed ring; the inner wall of the tower barrel is fixedly connected with a motor; the motor is connected with a driving wheel meshed with the gear ring.

Further, a cylinder cover is fixedly connected to the upper surface of the transmission shaft; and a through hole in clearance fit with the connecting shaft is formed in the side wall of the cylinder cover.

Further, the connecting shaft is rotatably connected with the inner wall of the through hole.

Further, a circular cover plate is fixedly connected to the outer wall of the cylinder cover; the inner wall of the circular cover plate is in clearance fit with the outer wall of the generator cabin.

Furthermore, the lower surface of the adjusting arc plate is fixedly connected with a plurality of guide posts; the lower end of the guide post penetrates through the mounting plate and is sleeved with a compression spring.

Furthermore, the upper end of the guide sleeve is of a closed structure; and a spring is arranged in the guide sleeve and is positioned between the upper end surface of the guide rod and the inner top surface of the guide sleeve.

The invention has the following beneficial effects:

according to the invention, the second groove on the adjusting arc plate is matched with the roller on the guide rod, when the adjusting arc plate rises, and the guide rod drives the movable roller to rotate to the second groove, the guide rod is driven to rise integrally, so that the connecting shaft is rotated by meshing of the rack and the gear, that is, the fan blade is rotated from the original vertical state to the horizontal state, thereby effectively reducing the wind resistance, being beneficial to improving the rotating speed of the transmission shaft under the condition of low wind speed, and effectively improving the wind energy utilization rate and the power generation efficiency.

Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural view of a low wind resistance wind turbine with variable fan blade angles according to the present invention;

FIG. 2 is a front view of the structure of FIG. 1;

FIG. 3 is a cross-sectional view taken at A-A of FIG. 2;

FIG. 4 is a schematic structural view of a transmission shaft;

FIG. 5 is a schematic structural view of a generator room, a transmission shaft and a connecting shaft;

FIG. 6 is a schematic structural view of the fixed arc plate and the adjustable arc plate;

FIG. 7 is a schematic structural view of an adjusting arc plate;

FIG. 8 is a schematic view of the guide bar;

fig. 9 is a schematic structural diagram of a fixed arc plate and an adjustable arc plate in the embodiment of the present invention;

FIG. 10 is a schematic structural diagram of an embodiment of the present invention;

in the drawings, the components represented by the respective reference numerals are listed below:

1-tower, 2-generator cabin, 3-transmission shaft, 4-fixed arc plate, 5-adjustable arc plate, 6-connecting shaft, 7-cylinder cover, 101-motor, 102-driving wheel, 201-mounting plate, 202-generator, 203-telescoping device, 204-annular guide rail, 205-connecting cylinder, 206-toothed ring, 301-fixed sleeve, 302-guide sleeve, 303-engaging notch, 304-straight notch, 305-guide rod, 306-sliding block, 307-rack, 308-fixed rod, 309-roller, 310-spring, 401-first channel, 402-upper chamfer, 501-second channel, 502-lower chamfer, 503-guide column, 504-compression spring, 601-gear, 602-fan blade, 701-circular cover plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "opening," "upper," "lower," "thickness," "top," "middle," "length," "inner," "peripheral," and the like are used in an orientation or positional relationship that is merely for convenience in describing and simplifying the description, and do not indicate or imply that the referenced component or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present invention.

Referring to fig. 1 and 2, the invention relates to a low wind resistance wind driven generator with a variable fan blade angle, which comprises a tower 1, wherein the bottom of the tower 1 is connected with a foundation. The upper end of the tower barrel 1 is rotatably connected with a generator cabin 2, and the generator cabin 2 can be of a barrel structure.

As shown in fig. 3, a connecting cylinder 205 rotatably connected with the inner wall of the tower barrel 1 is welded on the lower surface of the generator cabin 2, a toothed ring 206 is welded or screwed on the inner wall of the connecting cylinder 205, and the inner wall of the tower barrel 1 is fixedly connected with a motor 101 through a motor frame; the output shaft of the motor 101 is connected to a drive pulley 102 that meshes with a toothed ring 206. The outer wall of the tower barrel 1 can be provided with a wind direction indicator for detecting wind direction, and the wind direction indicator can be used for driving the generator cabin 2 to integrally rotate by controlling the rotation of the motor 101 and meshing the driving wheel 102 with the toothed ring 206. So that one side of the generator nacelle 2 is always in the direction of the wind.

As shown in fig. 3 and 5, a mounting plate 201 is welded or screwed to the inner wall of the generator room 2; the generator 202 is fixedly installed on the inner bottom surface of the generator cabin 2. The surface of the mounting plate 201 is provided with a through hole and is rotatably connected with a transmission shaft 3 through a bearing. The upper surface of the mounting plate 201 is fixedly connected with a fixed arc plate 4, the upper surface of the mounting plate 201 is movably connected with an adjusting arc plate 5, the mounting plate 201 is fixedly connected with a telescopic device 203, and the telescopic end of the telescopic device 203 is connected with the side wall of the adjusting arc plate 5; the mounting plate 201 has a circular guide 204 screwed to its upper surface concentrically with the drive shaft 3.

The telescoping device 203 can be electric putter, and the mountable of telescoping device 203 is at mounting panel 201 lower surface, and mounting panel 201 is run through to flexible end to be connected with 5 lateral walls of regulation circular arc board, can be so that adjust the vertical rebound of circular arc board 5 through telescoping device 203.

As shown in fig. 3 and 7, two to four guide posts 503 are welded to the lower surface of the adjusting arc plate 5; the mounting panel 201 is run through to guide pillar 503 lower extreme to the cover is equipped with compression spring 504, and compression spring 504 upper end and mounting panel 201 lower surface support and lean on, and compression spring 504 lower extreme carries out the position through the fixed block of welding or threaded connection on guide pillar 503 and limits.

As shown in fig. 6, the fixed arc plate 4 and the adjustable arc plate 5 are spliced to form a complete circular plate, and the cross sections of the fixed arc plate 4 and the adjustable arc plate 5 are both semicircular ring structures. And the two end faces of the fixed arc plate 4 are provided with sliding grooves which can be dovetail grooves or T-shaped grooves, and the two end faces of the adjusting arc plate 5 are connected with sliding strips matched with the sliding grooves, so that the fixed arc plate 4 and the adjusting arc plate 5 are connected more tightly, meanwhile, the fixed arc plate 4 and the adjusting arc plate 5 can realize relative sliding in the vertical direction, and the sliding stability is favorably improved.

The fixed arc plate 4 and the adjusting arc plate 5 are spliced into a complete circular ring plate which is concentric with the rotating shaft 3. A first channel 401 is arranged on the inner wall of the fixed arc plate 4; the inner top surfaces at the two ends of the first channel 401 are both provided with upper chamfers 402.

Second channel 501 has been seted up to 5 inner walls of regulation circular arc board, and second channel 501 splices into a complete annular channel with first channel 401, supports when leaning on with mounting panel 201 upper surface when 5 lower surfaces of regulation circular arc board, and second channel 501 and first channel 401's highly uniform this moment splices into the annular channel of completion each other. Lower chamfers 502 are arranged on the inner bottom surfaces of the two ends of the second channel 501.

As shown in fig. 3-5, the lower end of the drive shaft 3 is connected with a generator 202; the circumference array of the upper end of the transmission shaft 3 is provided with a plurality of fixing sleeves 301 which are horizontally arranged, the number of the fixing sleeves 301 can be eight or more, and one end of each fixing sleeve 301 is fixedly welded with the circumferential side surface of the transmission shaft 3. The guide sleeve 302 is welded on the outer wall of the end part of the fixed sleeve 301. The inner wall of the fixed sleeve 301 is rotatably connected with a connecting shaft 6 through a bearing. The peripheral side of the connecting shaft 6 is fixedly connected with a gear 601, and one end of the connecting shaft 6 is fixedly connected with a fan blade 602.

The side wall of the guide sleeve 302 is provided with a meshing notch 303 at a position opposite to the gear 601, so that teeth of the gear 601 can extend into the guide sleeve 302 through the meshing notch 303. The side wall of the guide sleeve 302 is axially provided with a straight notch 304, and the opening direction of the straight notch 304 is parallel to the axial direction of the connecting shaft 6. A guide rod 305 is clearance fitted in the guide sleeve 302.

The lower end of the guide sleeve 302 is fixedly connected with a sliding block 306 matched with the annular guide rail 204, so that when the transmission shaft 3 drives the fixed sleeve 301 and the guide sleeve 302 to rotate, the annular guide rail 204 is matched with the sliding block 306, and the improvement of the overall structural stability and reliability is facilitated.

As shown in fig. 8, a rectangular notch is formed in a side wall of the guide bar 305, and a rack 307 engaged with the gear 601 is fixedly connected in the rectangular notch. The side wall of the guide rod 305 is welded or screwed with a fixed rod 308 which is in clearance fit with the straight notch 304. The end of the fixed rod 308 is rotatably connected with a roller 309 which is matched with the second channel 501 and the first channel 401.

When the fan blades 602 drive the transmission shaft 3 to rotate through the connecting shaft 6 and the fixing sleeve 301 under the action of wind force, the guide sleeve 302 drives the guide rod 305 to rotate synchronously, and the roller 309 on the guide rod 305 moves along the second channel 501 and the first channel 401.

As shown in fig. 3 and 9, when the wind resistance needs to be reduced and the rotating speed of the transmission shaft 3 needs to be increased, the adjusting arc plate 5 is vertically moved upwards through the telescopic device 203, at this time, the second channel 501 and the first channel 401 are misaligned, the height of the second channel 501 is greater than that of the first channel 401, and the connecting end of the second channel 501 and the first channel 401 is connected and transited through the upper and lower chamfers 502 and the chamfers 402.

When the roller 309 moves along the first channel 401 to the end of the second channel 501, a lifting transition is effected by the lower chamfer 502, so that the roller 309 moves up the slope of the lower chamfer 502 and rolls onto the second channel 501. Due to the raised height of the second channel 501, the guide bar 305 is driven by the roller 309 and the fixing rod 308 to move upwards, and then the connecting shaft 6 is rotated by the engagement of the rack 307 and the gear 601, so that the fan blades 602 are rotated to be in a horizontal state by the rotation of the connecting shaft 6.

As shown in fig. 10, the direction of the arrow is wind direction, and the rotation direction of the fan blade 602 driving the transmission shaft 3 is counterclockwise. At this time, the right fan blades 602 are in a normal vertical state, and the maximum wind force can be obtained. And the left fan blade 602 rotates to be in a horizontal state, so that the windward side of the fan blade 602 is the smallest in the rotating process, the wind resistance is greatly reduced, the fan blade 602 can drive the transmission shaft 3 to rotate more easily, and the transmission shaft 3 obtains a larger rotating speed under the condition of the same wind speed. Thereby greatly improving the utilization rate of wind energy and the generating efficiency.

When the roller 309 moves from the second channel 501 to the first channel 401, the roller 309 descends, so that the guide bar 305, and thus the gear 601 via the rack 307, is reversed, i.e. the connecting shaft 6 is rotationally restored, and the fan blades 602 are rotated to the vertical state.

Wherein, the upper end of the guide sleeve 302 is of a closed structure; the spring 310 is arranged in the guide sleeve 302, and the spring 310 is located between the upper end surface of the guide rod 305 and the inner top surface of the guide sleeve 302, so that when the roller 309 moves to the first channel 401 in the second channel 501 under the action of the spring 310, the roller can quickly descend, and the efficiency of switching the fan blade 602 to the vertical state in the horizontal direction is ensured.

The anemoscope of 1 outer wall installation of tower section of thick bamboo, detectable wind direction when the direction changes, rotates through control motor 101 for 2 whole rotations in generator cabin, thereby make fixed arc board 4 and the face of connecting of adjusting arc board 5 parallel with the wind direction all the time, even make vertical state's flabellum 602 surface perpendicular and wind direction all the time, and horizontal state's flabellum 602 surface then is parallel with wind direction, thereby obtains best effect. When the wind speed is high, in order to prevent the generator 202 from overspeed, the adjusting arc plate 5 can be reset, so that the heights of the second channel 501 and the first channel 401 are consistent, all the fan blades 602 are in a vertical state, and the rotating speed of the transmission shaft 3 is restored to the normal rotating speed at the existing wind speed through the wind resistance of the transmission shaft.

As another preferable mode, as shown in fig. 1 to 3, a cylinder cover 7 is screwed to the upper surface of the drive shaft 3. The upper end of the cylinder cover 7 is closed, and the side wall of the cylinder cover 7 is provided with a through hole in clearance fit with the connecting shaft 6. And, connecting axle 6 passes through the bearing rotation with the through hole inner wall and is connected for the rotation of connecting axle 6 is more steady.

Simultaneously, the welding of 7 outer walls of cover has circular cover plate 701, circular cover plate 701 inner wall and generator cabin 2 outer wall clearance fit for the lower surface of circular cover plate 701 is less than the upper surface of generator cabin 2 lateral wall, makes outside rainwater or the difficult entering generator cabin 2 inside of dust, still can increase installation dustproof wool top or sealing strip etc. between circular cover plate 701 and generator cabin 2 lateral walls, improves inside leakproofness, further reduces the entering of inside dust.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A low wind resistance wind driven generator with variable fan blade angles comprises a tower barrel (1); the upper end of the tower barrel (1) is rotatably connected with a generator room (2); the inner wall of the generator cabin (2) is fixedly connected with a mounting plate (201); a generator (202) is fixedly connected to the inner bottom surface of the generator cabin (2); the method is characterized in that:

the mounting plate (201) is rotatably connected with a transmission shaft (3); the upper surface of the mounting plate (201) is fixedly connected with a fixed arc plate (4); the upper surface of the mounting plate (201) is movably connected with an adjusting arc plate (5); the mounting plate (201) is fixedly connected with a telescopic device (203), and the telescopic end of the telescopic device (203) is connected with the side wall of the adjusting arc plate (5); the upper surface of the mounting plate (201) is fixedly connected with an annular guide rail (204) which is concentric with the transmission shaft (3);

the fixed arc plate (4) and the adjusting arc plate (5) are spliced into a complete circular plate, and the cross sections of the fixed arc plate (4) and the adjusting arc plate (5) are semicircular ring structures; a first channel (401) is formed in the inner wall of the fixed arc plate (4); the inner top surfaces of two ends of the first channel (401) are provided with upper chamfers (402);

a second channel (501) is formed in the inner wall of the adjusting arc plate (5), and the second channel (501) and the first channel (401) are spliced to form a complete annular channel; lower chamfers (502) are arranged on the inner bottom surfaces of the two ends of the second channel (501);

the lower end of the transmission shaft (3) is connected with a generator (202); a fixed sleeve (301) which is horizontally arranged is arranged on the circumference of the upper end of the transmission shaft (3); the outer wall of the end part of the fixed sleeve (301) is fixedly connected with a guide sleeve (302);

the inner wall of the fixed sleeve (301) is rotatably connected with a connecting shaft (6); a gear (601) is fixedly connected to the peripheral side surface of the connecting shaft (6); one end of the connecting shaft (6) is fixedly connected with a fan blade (602);

the side wall of the guide sleeve (302) is provided with a meshing notch (303) at a position corresponding to the gear (601); a straight notch (304) is axially formed in the side wall of the guide sleeve (302); a guide rod (305) is in clearance fit in the guide sleeve (302); the lower end of the guide sleeve (302) is fixedly connected with a sliding block (306) matched with the annular guide rail (204);

a rectangular notch is formed in the side wall of the guide rod (305), and a rack (307) meshed with the gear (601) is fixedly connected in the rectangular notch; the side wall of the guide rod (305) is fixedly connected with a fixed rod (308) which is in clearance fit with the straight notch (304); the end part of the fixed rod (308) is rotatably connected with a roller (309) matched with the second channel (501) and the first channel (401).

2. The wind driven generator with the variable fan blade angle and the low wind resistance as claimed in claim 1, characterized in that a connecting cylinder (205) rotatably connected with the inner wall of the tower (1) is fixedly connected to the lower surface of the generator cabin (2);

a toothed ring (206) is fixedly connected to the inner wall of the connecting cylinder (205);

the inner wall of the tower tube (1) is fixedly connected with a motor (101);

the motor (101) is connected with a driving wheel (102) meshed with the gear ring (206).

3. The wind generator with the variable fan blade angle and the low wind resistance as claimed in claim 1 or 2, wherein a cylindrical cover (7) is fixedly connected to the upper surface of the transmission shaft (3); the side wall of the cylinder cover (7) is provided with a through hole in clearance fit with the connecting shaft (6).

4. The wind generator with low wind resistance and variable fan blade angle according to claim 3, wherein the connecting shaft (6) is rotatably connected with the inner wall of the through hole.

5. The wind driven generator with the variable fan blade angle and the low wind resistance as claimed in claim 4, characterized in that a circular cover plate (701) is fixedly connected to the outer wall of the cylinder cover (7); the inner wall of the circular cover plate (701) is in clearance fit with the outer wall of the generator cabin (2).

6. The wind driven generator with the variable fan blade angle and the low wind resistance as claimed in claim 1, 2, 4 or 5, wherein a plurality of guide posts (503) are fixedly connected to the lower surface of the adjusting circular arc plate (5); the lower end of the guide post (503) penetrates through the mounting plate (201) and is sleeved with a compression spring (504).

7. The wind driven generator with low wind resistance and variable fan blade angle according to claim 1, 2, 4 or 5, characterized in that the upper end of the guide sleeve (302) is of a closed structure; a spring (310) is arranged in the guide sleeve (302), and the spring (310) is located between the upper end face of the guide rod (305) and the inner top face of the guide sleeve (302).