CN115217713A - Deformable fan blade structure of wind driven generator - Google Patents
Deformable fan blade structure of wind driven generator Download PDFInfo
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- CN115217713A CN115217713A CN202211146607.1A CN202211146607A CN115217713A CN 115217713 A CN115217713 A CN 115217713A CN 202211146607 A CN202211146607 A CN 202211146607A CN 115217713 A CN115217713 A CN 115217713A
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- 230000009471 action Effects 0.000 claims abstract description 10
- 230000007704 transition Effects 0.000 claims abstract description 5
- 210000000988 bone and bone Anatomy 0.000 claims description 35
- 230000008859 change Effects 0.000 claims description 17
- 241000883990 Flabellum Species 0.000 claims description 9
- 239000013013 elastic material Substances 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 230000007246 mechanism Effects 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor
- F03D1/06—Rotors
- F03D1/065—Rotors characterised by their construction elements
- F03D1/0675—Rotors characterised by their construction elements of the blades
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/022—Adjusting aerodynamic properties of the blades
- F03D7/0236—Adjusting aerodynamic properties of the blades by changing the active surface of the wind engaging parts, e.g. reefing or furling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/022—Adjusting aerodynamic properties of the blades
- F03D7/024—Adjusting aerodynamic properties of the blades of individual blades
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2240/00—Components
- F05B2240/20—Rotors
- F05B2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
- F05B2240/31—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor of changeable form or shape
- F05B2240/311—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor of changeable form or shape flexible or elastic
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Abstract
The invention relates to the field of wind driven generators, and discloses a deformable fan blade structure of a wind driven generator, which comprises an abutting convex disk ring, an abutting convex disk ring cross beam, a first push ring, a second push ring, a support rib, a rotating long shaft thread, a fan blade root, a fan blade transition wing, a shell, a fan blade tip, a blade root connecting convex disk and a blade tip connecting convex disk; the deformable fan blade structure of the wind driven generator drives the first push ring and the second push ring to move relatively through rotation of the long shaft inside the fan blade, the shape of the abutting convex disc is changed under the action of the supporting ribs, and then the wing section wing chord line of the position of the abutting convex disc is changed, so that the blade surface of the fan blade is twisted to a proper degree, under the condition of frontal windward, the twisting degree of the fan blade is adjusted according to the strength of wind power by the wind driven generator, and the kinetic energy of wind energy which is efficiently converted into the fan blade as far as possible is further converted into electric energy.
Description
Technical Field
The invention relates to the technical field of wind driven generators, in particular to a deformable fan blade structure of a wind driven generator.
Background
With the development of society and the progress of science and technology, people have stronger dependence on energy, but the traditional non-renewable energy sources such as petroleum, coal and the like are increasingly exhausted and the price is continuously increased, the development and research of sustainable new energy sources are devoted all over the world, wind energy is increasingly favored by people as a clean and pollution-free renewable energy source, and a wind driven generator is a product under the research of wind energy utilization. The wind power generator is an electric power device which converts wind energy into mechanical work, the mechanical work drives a rotor to rotate, and alternating current is finally output. Wind power generators are mainly classified into horizontal axis wind power generators and vertical axis wind power generators according to the difference of a rotating axis. The design of blades in a wind driven generator directly influences the conversion efficiency of wind energy and the annual energy production of the wind driven generator, and is an important ring for wind energy utilization.
The Chinese patent with the publication number of CN114198247A discloses an energy-saving and efficient wind power generation blade unit, which comprises a shell, wherein the left end of the shell is movably connected with a pushing mechanism, the right end of the pushing mechanism is movably connected with a steering mechanism, the upper end of the pushing mechanism is movably connected with a tension rod, and the upper end of the tension rod is movably connected with a lubricating mechanism. Trigger through the inside contact of trigger mechanism, thereby outside driving source makes the steering spindle take place to rotate, and then drive the locating piece and rotate together, when the locating piece rotated the right-hand member, the locating piece had a thrust to the trigger ring inner wall this moment, make the trigger ring move right, and then make the trigger ring disappear to trigger mechanism's pressing force, thereby make outside driving source stop movement, thereby make the steering spindle rotate suitable angle, and then make the aerogenerator flabellum rotate the windward direction, thereby reach aerogenerator's flabellum and take place pivoted effect along with the wind direction is automatic.
The inventor thinks that in the related art, the curvature of the blade surface of the fan blade of the wind driven generator is fixed, and when the fan blade is subjected to wind power in the direction opposite to the bending direction, the utilization effect of the wind power by the fan blade is poor. In view of the foregoing, there is a need in the art to provide a deformable blade structure of a wind turbine generator for improving the generating efficiency of the wind turbine generator.
Disclosure of Invention
In order to overcome the problems in the prior art, the invention provides a deformable fan blade structure of a wind driven generator, which comprises an abutting convex disk ring, an abutting convex disk ring cross beam, a first push ring, a second push ring, a support bone, a rotary long shaft thread, a fan blade root, a fan blade transition wing, a fan blade shell, a fan blade tip, a blade root connecting convex disk and a blade tip connecting convex disk; the plurality of abutting convex discs comprise abutting convex disc rings, abutting convex disc ring cross beams, first push rings, second push rings and support bones; each abutting convex disc is provided with an abutting convex disc ring arranged along the section of the fan blade shell, and the abutting convex disc ring is connected with the fan blade shell, so that the shape change of the abutting convex disc ring can drive the shape change of the fan blade shell near the position of the abutting convex disc ring; the rotary long shaft is connected with each abutting convex disc, each abutting convex disc is distributed along the axial direction of the rotary long shaft, and the blade root connecting convex disc and the blade tip connecting convex disc are positioned at two ends of the rotary long shaft; the rotation long shaft rotates and can drive the first push ring and the second push ring to move relatively along the rotation long shaft, the shape of the abutting convex disc ring is changed under the action of the supporting bone, and then the airfoil-shaped chord line of the fan blade section at the position of the abutting convex disc is changed, so that the torsion degree of the fan blade surface is changed.
The abutting convex disc ring is made of elastic materials, equal support bones are symmetrically distributed on two sides of the abutting convex disc ring, and the other ends of the support bones are connected with the first push ring or the second push ring; when the first push ring and the second push ring move towards each other, the support bone moves obliquely upwards, and the abutting convex disc ring expands under the action of the support bone; when the first push ring and the second push ring move back to back, the support bone moves obliquely downwards, and the abutting convex disc ring contracts under the action of the support bone.
The first push ring and the second push ring comprise an inner ring and an outer ring; the rotating long shaft is matched with the first push ring and the second push ring, and the threads of the inner ring of the first push ring and the second push ring are opposite in rotating direction, so that the first push ring and the second push ring are opposite in rotating direction when the rotating long shaft rotates.
The whole elastic material that adopts of flabellum shell can change its cross-section airfoil chord line under the effect of butt flange to change flabellum blade surface torsion degree.
One end of the rotating long shaft penetrates through the blade root of the fan blade to be connected with the servo driving device, and the rotating directions of the rotating long shaft and the threads matched with the first push ring and the second push ring in each abutting convex disc are opposite.
The blade root connecting convex disc and the blade tip connecting convex disc are of solid structures, and cannot rotate along with the rotation of the long rotating shaft to change in shape or rotate.
In the expansion process of the abutting convex disc, the upper and lower 4 support bones at the two sides of the abutting convex disc are respectively subjected to outward force along the support bones
、
、
、
Wherein the supporting bones at the upper two sides are stressed
、
Component force in horizontal direction
、
Equal in size and opposite in direction, therefore
、
The force components in the horizontal direction cancel each other; and is provided with
、
Component in the vertical direction
、
The sizes are equal and the directions are the same; in the same way, the two side supporting bones below the lower part are stressed
、
Component force in horizontal direction
、
Equal in size and opposite in direction, therefore
、
The force components in the horizontal direction cancel each other; and is
、
Component in the vertical direction
、
Equal in size and equal in direction.
Furthermore, the invention also discloses a deformable fan blade structure of the wind driven generator, which comprises the following steps:
1) When the front faces the wind and the wind power is small, the wind driven generator adjusts the torsion degree of the fan blades according to the strength of the wind power, and the contact area between the fan blades and the wind is increased as much as possible, so that the wind energy is efficiently converted into the kinetic energy of the fan blades and further converted into the electric energy;
2) When the wind is windward and strong in wind power, the wind driven generator adjusts the torsion degree of the fan blades according to the strength of the wind power, the contact area between the fan blades and the wind is slightly reduced, the wind driven generator is protected from being damaged, and the wind energy is efficiently converted into the kinetic energy of the fan blades to be further converted into the electric energy.
Compared with the prior art, the invention has the advantages and positive effects that:
(1) The shape of the fan blade of the existing wind driven generator is mostly fixed and unchangeable, and the shape of the fan blade of the wind driven generator cannot be adjusted in time according to the condition of wind power in a wind field;
(2) The abutting convex disc provided by the invention has the advantages of simple structure, low manufacturing cost and convenience in installation, and the use cost of the wind driven generator is reduced;
(3) The deformable fan blade structure of the wind driven generator is suitable for various occasions, can be applied to wind driven generators on land and offshore wind driven generators, and has extremely high convenience and applicability.
Drawings
FIG. 1 is a schematic external view of a wind turbine provided in accordance with the present invention;
FIG. 2 is a schematic view of an appearance of a fan blade of a wind turbine provided in the present invention;
FIG. 3 is an external view of a deformable blade of a wind turbine according to the present invention;
FIG. 4 is a schematic view of an internal structure of a deformable blade of a wind turbine according to the present invention;
FIG. 5 is a schematic view of the structure of the fan blade with the long rotating shaft, the connecting convex disc and the abutting convex disc;
FIG. 6 is a schematic view of a structure of a convex abutting disk according to the present invention;
FIG. 7 is a right side view of the invention showing the engagement of the long axis of rotation, the connecting flange and the abutting flange within the fan blade;
fig. 8 is a schematic structural view of a first push ring and a second push ring provided in the present invention;
FIG. 9 is a schematic view of the inner structure of the abutment flange according to the present invention under force when expanded;
FIG. 10 is a schematic view of the inner structure of the abutment flange according to the present invention under stress when it is retracted;
description of reference numerals:
1-abutting convex disc ring 2-abutting convex disc ring cross beam 3-first push ring 4-second push ring 5-support bone 6-rotating long shaft 7-rotating long shaft thread 8-blade root 9-blade transition wing 10-shell 11-blade tip 12-blade root connecting convex disc 13-blade tip connecting convex disc 14-inner ring 15-outer ring.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments.
As shown in the attached drawings 1-4, the device comprises an abutting convex disc ring 1, an abutting convex disc ring cross beam 2, a first push ring 3, a second push ring 4, a support bone 5, a rotating long shaft 6, a thread 7, a fan blade root 8, a fan blade transition wing 9, a fan blade shell 10, a fan blade tip 11, a blade root connecting convex disc 12 and a blade tip connecting convex disc 13; the plurality of abutting convex discs comprise abutting convex disc rings 1, abutting convex disc ring cross beams 2, first push rings 3, second push rings 4 and support bones 5; each abutting convex disc is provided with an abutting convex disc ring 1 arranged along the section of the fan blade shell 10, and the abutting convex disc ring 1 is connected with the fan blade shell 10, so that the shape change of the abutting convex disc ring 1 can drive the shape change of the fan blade shell 10 near the position where the abutting convex disc ring 1 is located; the rotating long shaft 6 is connected with the abutting convex discs, the abutting convex discs are distributed along the axial direction of the rotating long shaft 6, and the blade root connecting convex disc 12 and the blade tip connecting convex disc 13 are positioned at two ends of the rotating long shaft 6; rotate major axis 6 and rotate and to drive first throw-out collar 3 and second throw-out collar 4 along rotating major axis 6 relative motion, change the shape of butt flange circle 1 under the effect of support bone 5, and then make butt flange position flabellum cross-section airfoil chord line change to change flabellum blade surface torsion degree. The whole fan blade shell 10 is made of elastic materials, and the cross section airfoil chord line of the fan blade shell can be changed under the action of the abutting convex disk, so that the twisting degree of the blade surface of the fan blade is changed.
As shown in fig. 5, 6 and 7, the abutting convex coil 1 is made of an elastic material, equal amounts of support bones 5 are symmetrically distributed on two sides of the abutting convex coil, and the other ends of the support bones 5 are connected with the first push ring 3 or the second push ring 4; when the first push ring 3 and the second push ring 4 move in a facing manner, the support rib 5 moves obliquely upwards, and the abutting convex coil 1 expands under the action of the support rib 5; when the first push ring 3 and the second push ring 4 move back to back, the support bone 5 moves obliquely downwards, and the abutting convex coil 1 contracts under the action of the support bone 5. One end of the long rotating shaft 6 penetrates through a blade root 8 to be connected with a servo driving device, and the rotating directions of the long rotating shaft 6 and the threads matched with the first push ring 3 and the second push ring 4 in each abutting convex disc are opposite.
The blade root connecting convex disc 12 and the blade tip connecting convex disc 13 are solid structures, and cannot change in shape along with the rotation of the long rotating shaft 6 or rotate along with the rotation of the long rotating shaft 6.
As shown in fig. 8, the first push ring 3 and the second push ring 4 include an inner ring 14 and an outer ring 15; the screw threads of the inner rings 14 of the first push ring 3 and the second push ring 4 have opposite directions, and the screw threads of the matching portions of the rotating long shaft 6 and the first push ring 3 and the second push ring 4 also have opposite directions, so that the first push ring 3 and the second push ring 4 always move in the opposite direction when the rotating long shaft 6 rotates.
As shown in fig. 9 and 10, the upper and lower 4 supporting bones 5 of the abutting convex disc are respectively forced outwards along the supporting bones 5 during the expansion process
、
、
、
Wherein the supporting bones 5 on the upper two sides are stressed
、
Component force in horizontal direction
、
Equal in size and opposite in direction, therefore
、
The component forces in the horizontal direction are mutually offset; and is
、
Component in the vertical direction
、
The sizes are equal and the directions are the same; in the same way, the supporting bones 5 at the two sides of the lower part are stressed
、
Component force in horizontal direction
、
Equal in size and opposite in direction, therefore
、
The force components in the horizontal direction cancel each other; and is
、
Component in the vertical direction
、
Equal in size and same in direction.
The specific work flow can be divided into the following two steps:
1) When the front faces the wind and the wind power is small, the wind driven generator adjusts the torsion degree of the fan blades according to the strength of the wind power, and the contact area between the fan blades and the wind is increased as much as possible, so that the wind energy is efficiently converted into the kinetic energy of the fan blades and further converted into the electric energy;
2) When the wind power generator is windward from the front and the wind power is strong, the wind power generator adjusts the torsion degree of the fan blades according to the strength of the wind power, and the contact area between the fan blades and the wind is slightly reduced, so that the wind power generator is protected from being damaged, namely the wind power is efficiently converted into the kinetic energy of the fan blades to be further converted into the electric energy.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (7)
1. A wind-driven generator flexible flabellum structure which characterized in that: the method comprises the following steps:
the device comprises an abutting convex disc ring (1), an abutting convex disc ring cross beam (2), a first push ring (3), a second push ring (4), a support rib (5), a rotating long shaft (6) thread (7), a fan blade root (8), a fan blade transition wing (9), a fan blade shell (10), a fan blade tip (11), a blade root connecting convex disc (12) and a blade tip connecting convex disc (13); the plurality of abutting convex discs comprise abutting convex disc rings (1), abutting convex disc ring cross beams (2), first push rings (3), second push rings (4) and support bones (5); each abutting convex disc is provided with an abutting convex disc ring (1) arranged along the section of the fan blade shell (10), and the abutting convex disc ring (1) is connected with the fan blade shell (10), so that the shape change of the abutting convex disc ring (1) can drive the shape change of the fan blade shell (10) near the position where the abutting convex disc ring is located; the rotary long shaft (6) is connected with the abutting convex discs, the abutting convex discs are distributed along the axial direction of the rotary long shaft (6), and the blade root connecting convex disc (12) and the blade tip connecting convex disc (13) are positioned at two ends of the rotary long shaft (6); rotate major axis (6) and rotate and to drive first throw-out collar (3) and second throw-out collar (4) along rotating major axis (6) relative motion, change the shape of butt protruding dish circle (1) under the effect of support bone (5), and then make butt protruding dish position flabellum cross-section airfoil chord line change to change flabellum blade surface torsion degree.
2. The deformable blade structure of claim 1, wherein:
the abutting convex disc ring (1) is made of elastic materials, equal amount of supporting bones (5) are symmetrically distributed on two sides of the abutting convex disc ring, and the other ends of the supporting bones (5) are connected with the first push ring (3) or the second push ring (4); when the first push ring (3) and the second push ring (4) move towards each other, the support rib (5) moves towards the oblique upper direction, and the abutting convex coil (1) expands under the action of the support rib (5); when the first push ring (3) and the second push ring (4) move back to back, the support bone (5) moves obliquely downwards, and the abutting convex disc ring (1) contracts under the action of the support bone (5).
3. The deformable blade structure of claim 1, wherein:
the first push ring (3) and the second push ring (4) comprise an inner ring (14) and an outer ring (15); the screw threads of the inner rings (14) of the first push ring (3) and the second push ring (4) are opposite in rotation direction, and the screw threads of the matching parts of the rotating long shaft (6) and the first push ring (3) and the second push ring (4) are also opposite in rotation direction, so that the first push ring (3) and the second push ring (4) are always opposite to each other when the rotating long shaft (6) rotates.
4. The deformable blade structure of claim 1, wherein:
the whole fan blade shell (10) is made of elastic materials, and the cross section airfoil chord line can be changed under the action of the abutting convex disk, so that the torsion degree of the fan blade surface is changed.
5. The deformable blade structure of claim 1, wherein:
one end of the rotary long shaft (6) penetrates through a fan blade root (8) to be connected with a servo driving device, and the rotary long shaft (6) is opposite to the thread turning direction matched with the first push ring (3) and the second push ring (4) in each abutting convex disc.
6. The deformable blade structure of claim 1, wherein:
the blade root connecting convex disc (12) and the blade tip connecting convex disc (13) are solid structures, and cannot change in shape along with the rotation of the long rotating shaft (6) or rotate along with the rotation of the long rotating shaft (6).
7. The deformable blade structure of claim 1, wherein:
in the expansion process of the abutting convex disc, the upper and lower 4 support bones (5) on the two sides of the abutting convex disc are respectively subjected to outward force along the support bones (5)
、
、
、
Wherein the supporting bones (5) at the upper two sides are stressed
、
Component force in horizontal direction
、
Phase of big and smallEqual and opposite directions, so
、
The force components in the horizontal direction cancel each other; and is provided with
、
Component of force in the vertical direction
、
The sizes are equal and the directions are the same; in the same way, the supporting bones (5) at the two sides of the lower part are stressed
、
Component force in horizontal direction
、
Equal in size and opposite in direction, therefore
、
The force components in the horizontal direction cancel each other; and is
、
Component in the vertical direction
、
Equal in size and same in direction.
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| CN207554265U (en) * | 2017-12-08 | 2018-06-29 | 安徽六和同心风能设备有限公司 | The barrel type wind-driven generator on variable blade face |
| CN209430335U (en) * | 2018-10-26 | 2019-09-24 | 池州市东聚新能源科技有限公司 | A kind of novel wind power blade |
| CN110374796A (en) * | 2019-07-29 | 2019-10-25 | 明阳智慧能源集团股份公司 | A kind of wind-driven generator inflatable blade construction |
| EP3913212A1 (en) * | 2020-05-19 | 2021-11-24 | Siemens Gamesa Renewable Energy A/S | Blade for a wind turbine comprising means for retaining a spoiler at a retracted position |
| JP7131871B1 (en) * | 2021-05-10 | 2022-09-06 | 明久 松園 | Symmetric streamline blade spiral wind turbine |
| CN215804945U (en) * | 2021-08-17 | 2022-02-11 | 梁运富 | Wind power generation device with telescopic function |
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| CN115217713B (en) | 2022-11-29 |
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