CN110374793A - Variable-length pneumatic equipment bladess device - Google Patents
Variable-length pneumatic equipment bladess device Download PDFInfo
- Publication number
- CN110374793A CN110374793A CN201910591283.4A CN201910591283A CN110374793A CN 110374793 A CN110374793 A CN 110374793A CN 201910591283 A CN201910591283 A CN 201910591283A CN 110374793 A CN110374793 A CN 110374793A
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- China
- Prior art keywords
- air cylinder
- cylinder barrel
- pars contractilis
- blade root
- blade
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 15
- 238000005192 partition Methods 0.000 claims abstract description 9
- 230000005484 gravity Effects 0.000 claims abstract description 7
- 230000000694 effects Effects 0.000 abstract description 3
- 230000009467 reduction Effects 0.000 abstract description 2
- 238000010408 sweeping Methods 0.000 description 10
- 238000007789 sealing Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
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
- F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
- F03D13/10—Assembly of wind motors; Arrangements for erecting wind motors
-
- 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
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Wind Motors (AREA)
Abstract
The present invention relates to a kind of variable-length pneumatic equipment bladess devices comprising: blade root pars contractilis is the cylindrical section that the root of pneumatic equipment bladess extends out；Partition is sealed, is used for the bottom end closure of blade root pars contractilis, so that blade root pars contractilis forms movement；Air cylinder barrel, it is semi open model cylinder, air cylinder barrel is for fixing on the wheel hub of wind energy conversion system, blade root pars contractilis is assemblied in air cylinder barrel, when pneumatic equipment bladess rotate, pneumatic equipment bladess drive blade root pars contractilis to stretch in air cylinder barrel under the suction function of its gravity and air cylinder barrel, and then are used to adjust the length of blade of wind energy conversion system.It using this structure, realizes that blade leans on self gravity, carries out the flexible of limited travel with swing circle, and then limit and catch wind load, balanced blade loading, to reach reduction alternating load, extend the effect of leaf longevity.
Description
Technical field
The present invention relates to wind energy power technology fields, more particularly, to a kind of variable-length pneumatic equipment bladess device.
Background technique
With sizable application wind energy conversion system design and manufacturing technology it is increasingly mature, cost is gradually clear, and blade is as wind-powered electricity generation
The big component of unit, plays the important function of energy conversion and control, manufacturing cost be about the 15~20%. of complete machine cost and
Wind turbines need to only utilize the kinetic energy of wind, all not need fuel in its whole life cycle and disappear as renewable and clean energy resource
Consumption, therefore the cost of wind energy conversion system is mainly made of following three aspect: manufacture, installation and debugging, operation and maintenance.Improving economy can be from
Two kinds of Technology Ways are set about, first is that Fine design reduces the cost of main component, besides extend the expected operation of critical component
Service life.It is major way for now vaned improvement the latter.
To strive for longer service life, more accurate dead load is needed to be grasped in vane design of wind turbines and fatigue carries
Lotus.The projected life of wind energy conversion system, by taking 2MW unit as an example, blade will rotate about 10 in its life cycle management at 20 years or more8
Cycle magnitude, be subject to alternation each week gravity, wind shear, yaw error, axis warpage, pylon interference, turbulent flow work
With.Therefore, in vane design of wind turbines, fatigue load is very important factor, and significance level even can be with limit wind
Ultimate load caused by speed is compared.The control system of trunnion axis upwind wind energy conversion system is generally based on sensor, controller and holds
The active control of row mechanism.Sensor measurement wind speed and direction, wheel speed, output power or torque；Executing agency adjusts motor
Torque, propeller pitch angle and yaw angle etc.；And both controller connections, and drive executing agency to measure sensor by control algolithm
Result carry out necessary reaction, to be optimal the control target such as power or load.
However, the system based on unified variable propeller pitch cannot be good for blade alternating load caused by wind shear induction
Control the load fluctuation.For this purpose, the control system of some reinforcings introduces blade root moment of flexure sensor and uses blade independent pitch
Method reduces alternating load caused by wind shear.In recent years, this independent pitch system also introduces real-time inflow velocity measurement
Technology, such as LDV technique, acoustics windfinding radar.Alternating load can be effectively reduced in independent pitch control method really, but
Corresponding cost is also higher, because it increases variable pitch frequency, and the requirement of sensor and executing agency greatly improved.
Therefore need to develop the method that reliable low cost inhibits alternating load.
The independent pitch device of documents 1 (CN106224158 A) pneumatic equipment bladess is related to a kind of variable pitch blade and sets
There is the wind turbine of the variable pitch blade, the variable pitch blade includes at least two sequentially connected blade sections.Above-mentioned variable pitch blade, can
Change propeller pitch angle respectively by different sections of blade of control and realize the local variable pitch of variable pitch blade, to make the variable pitch blade can
By obtaining highest wind energy absorption efficiency under conditions of different wind speed and revolving speed, overcoming whole variable pitch blade be cannot achieve
The problem of optimal wind energy absorption efficiency is obtained under different wind speed and revolving speed.
But the blade variation mentioned in this technology, needs manually to be replaced according to weather condition, meanwhile, a period of time
It is interior to use a kind of blade, without the function of realizing flexible reduction alternating load in real time according to airflow condition.
Summary of the invention
The purpose of the present invention is to provide a kind of variable-length pneumatic equipment bladess devices, realize blade by self gravity
Length changes, to realize that length of blade changes, does not consume external energy.
To achieve the above object, the present invention provides a kind of variable-length pneumatic equipment bladess devices, comprising: blade root is flexible
Portion is the cylindrical section that the root of pneumatic equipment bladess extends out；Partition is sealed, is used to seal the bottom end of blade root pars contractilis
It closes, so that blade root pars contractilis forms movement；Air cylinder barrel is semi open model cylinder, and air cylinder barrel is for fixing to wind
On the wheel hub of power machine, blade root pars contractilis is assemblied in air cylinder barrel, when pneumatic equipment bladess rotate, pneumatic equipment bladess in its gravity and
Blade root pars contractilis is driven to stretch in air cylinder barrel under the suction function of air cylinder barrel, and then the blade for being used to adjust wind energy conversion system is long
Degree.
Optional or preferred, air cylinder barrel side and blade root pars contractilis side all have frustum structure, air cylinder barrel
Both frustum structure and the frustum structure of blade root pars contractilis are opposite, and blade root pars contractilis can be free to slide along air cylinder barrel side；
The frustum structure of air cylinder barrel and the frustum structure of blade root pars contractilis are used to prevent blade root pars contractilis from deviating from out of air cylinder barrel.
Optional or preferred, air cylinder barrel and blade root pars contractilis are sealed by Piston volume tube and are assembled；Piston volume tube is located at
In the groove of air cylinder barrel side or blade root pars contractilis side；Groove on air cylinder barrel side is located on the frustum of air cylinder barrel
Side；Groove on blade root pars contractilis side, below the frustum of the blade root pars contractilis.
Technical solution provided by the invention has the benefit that the Periodic Rotating with blade, and length of blade does week
The variation of phase property, realizing has larger wind sweeping area in the sweeping area of lower wind speed, increases and catches wind energy power, and sweeping in higher wind
Plunderring region has smaller wind sweeping area, and limitation catches wind load, achievees the effect that load equalization.
Detailed description of the invention
Fig. 1 is a kind of cross-sectional view of variable-length pneumatic equipment bladess device provided by the present invention；
Fig. 2 is a kind of partial enlarged view of variable-length pneumatic equipment bladess device provided by the invention.
Wherein: A, blade；B, blade root pars contractilis；C, partition is sealed；D, air cylinder barrel；E, Piston volume tube 1；E’, piston ring
Group 2.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is described in further detail.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", "upper", "lower",
The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is
It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of description the invention and simplifies description, rather than indicate
Or imply that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore cannot understand
For the limitation to the invention.
Term " installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, be also possible to removable
Connection is unloaded, or is integrally connected；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, it can also be in
Between medium be indirectly connected, can be the connection inside two elements.For the ordinary skill in the art, can pass through
Concrete condition understands concrete meaning of the above-mentioned term in the invention.
Further detailed description is done to the present invention combined with specific embodiments below, but embodiments of the present invention are not limited to
This.
As depicted in figs. 1 and 2, a kind of variable-length pneumatic equipment bladess device provided in an embodiment of the present invention, because blade A with
Air cylinder barrel D is cylindrical, and cross-sectional view has symmetry along vertical central axis line.Such variable-length wind energy conversion system leaf as seen from the figure
Sheet devices include air cylinder barrel D, and air cylinder barrel D is in semi-open cylindrical shape, and the air top cylinder barrel D is equipped with frustum structure, cylindric
Pneumatic equipment bladess root B is placed on the inside of air cylinder barrel D, and blade root pars contractilis B can be relatively free to slide with air cylinder barrel D；Blade root
Pars contractilis B has the frustum structure opposite with air cylinder barrel D, sets on the outside of blade root pars contractilis B with the side to connect air cylinder barrel D
It is fluted, it is provided with Piston volume tube E, identical Piston volume tube E’Structure exists in flexible with blade root on the inside of air cylinder barrel D
The position that portion B is in contact, this two groups of piston rings E, E’Make blade root pars contractilis B and air cylinder barrel D-shaped at sealed connection.Blade root is flexible
Portion bottom is equipped with sealing partition C, and sealing space is formed at sealing partition C and the lower part air cylinder barrel D.Wind energy conversion system work when, blade with
Air cylinder barrel is around wind energy conversion system axis rotation, and Plane of rotation is perpendicular to ground, the relative position generation week of blade A and air cylinder barrel D
The variation of phase property, when blade A is rotated to above wind energy conversion system, air cylinder barrel D is located at below blade A, and blade A makees due to own wt
Moved with to the direction air cylinder barrel D, the sealing partition of blade root pars contractilis B and air cylinder barrel D-shaped at sealing space compressed,
Piston volume tube E and E’Between form air negative pressure, blade A active length shortens, and wind sweeping area reduces；When blade A rotates to wind
When below power machine, air cylinder barrel D is located above blade A, and blade A is sealed simultaneously since self gravity deviates from air cylinder barrel direction
Compressed air between partition C and air cylinder barrel D has the trend expanded outward, Piston volume tube E and E’Between air negative pressure tool
Oriented contract trend, thus be mounted on blade root pars contractilis B sealing partition C and air cylinder barrel D-shaped at sealing space by
To stretching, the elongation of blade A active length, wind sweeping area increases.With the Periodic Rotating of blade A, blade A length does periodical change
Change, realizing has larger wind sweeping area in the sweeping area of lower wind speed, and wind energy power is caught in increase, and in the sweeping area of higher wind
There is smaller wind sweeping area, limitation catches wind load, achievees the effect that load equalization.
Unless otherwise defined, the technical term or scientific term used herein should be in fields of the present invention and has
The ordinary meaning that the personage of general technical ability is understood.Used in the invention patent description of the invention and claims " the
One ", " second " and similar word are not offered as any sequence, quantity or importance, and are used only to distinguish different
Component part.Equally, the similar word such as "one" or " one " does not indicate that quantity limits yet, but indicates that there are at least one.
" connection " either the similar word such as " connected " is not limited to physics or mechanical connection, but may include electrical
Connection, it is either direct or indirect.
The foregoing is merely example embodiments of the present invention, are not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (3)
1. a kind of variable-length pneumatic equipment bladess device characterized by comprising
Blade root pars contractilis is the cylindrical section that the root of pneumatic equipment bladess extends out；
Partition is sealed, is used for the bottom end closure of the blade root pars contractilis, so that the blade root pars contractilis forms movement；
Air cylinder barrel is semi open model cylinder, and for fixing on the wheel hub of wind energy conversion system, the blade root stretches the air cylinder barrel
Contracting portion is assemblied in the air cylinder barrel, and when pneumatic equipment bladess rotate, the pneumatic equipment bladess are in its gravity and the air cylinder
It drives the blade root pars contractilis to stretch under the suction function of cylinder in the air cylinder barrel, and then is used to adjust the blade of wind energy conversion system
Length.
2. variable-length pneumatic equipment bladess device according to claim 1, which is characterized in that
Air cylinder barrel side and blade root pars contractilis side all have frustum structure, the frustum structure of the air cylinder barrel
It is opposite with both frustum structures of the blade root pars contractilis, and the blade root pars contractilis can be along air cylinder barrel side free skating
It is dynamic；
The frustum structure of the frustum structure of the air cylinder barrel and the blade root pars contractilis be used to prevent the blade root pars contractilis from
Abjection in the air cylinder barrel.
3. variable-length pneumatic equipment bladess device according to claim 1, which is characterized in that
The air cylinder barrel and the blade root pars contractilis are sealed by Piston volume tube to be assembled；
The Piston volume tube is located in the groove of air cylinder barrel side or blade root pars contractilis side；
Groove on air cylinder barrel side is located above the frustum of the air cylinder barrel；
Groove on blade root pars contractilis side, below the frustum of the blade root pars contractilis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910591283.4A CN110374793B (en) | 2019-07-02 | 2019-07-02 | Variable length wind turbine blade apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910591283.4A CN110374793B (en) | 2019-07-02 | 2019-07-02 | Variable length wind turbine blade apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110374793A true CN110374793A (en) | 2019-10-25 |
| CN110374793B CN110374793B (en) | 2024-08-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910591283.4A Active CN110374793B (en) | 2019-07-02 | 2019-07-02 | Variable length wind turbine blade apparatus |
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| Country | Link |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030223868A1 (en) * | 2002-06-04 | 2003-12-04 | Dawson Mark H. | Telescoping wind turbine blade |
| CN102555116A (en) * | 2010-12-17 | 2012-07-11 | 通用电气公司 | Method and apparatus for producing a rotor blade |
| WO2013171257A1 (en) * | 2012-05-16 | 2013-11-21 | Lm Wp Patent Holding A/S | A system and method for mounting devices to a wind turbine blade |
| CN105673317A (en) * | 2016-03-21 | 2016-06-15 | 中国华能集团清洁能源技术研究院有限公司 | Hinging mechanism for blades of large wind generating set |
| CN108301971A (en) * | 2018-03-20 | 2018-07-20 | 盐城工学院 | Micro wind turbine generator antioverloading wind wheel structure and micro wind turbine generator |
| CN210460944U (en) * | 2019-07-02 | 2020-05-05 | 中国大唐集团新能源科学技术研究院有限公司 | Length-variable wind turbine blade device |
-
2019
- 2019-07-02 CN CN201910591283.4A patent/CN110374793B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030223868A1 (en) * | 2002-06-04 | 2003-12-04 | Dawson Mark H. | Telescoping wind turbine blade |
| CN102555116A (en) * | 2010-12-17 | 2012-07-11 | 通用电气公司 | Method and apparatus for producing a rotor blade |
| WO2013171257A1 (en) * | 2012-05-16 | 2013-11-21 | Lm Wp Patent Holding A/S | A system and method for mounting devices to a wind turbine blade |
| CN105673317A (en) * | 2016-03-21 | 2016-06-15 | 中国华能集团清洁能源技术研究院有限公司 | Hinging mechanism for blades of large wind generating set |
| CN108301971A (en) * | 2018-03-20 | 2018-07-20 | 盐城工学院 | Micro wind turbine generator antioverloading wind wheel structure and micro wind turbine generator |
| CN210460944U (en) * | 2019-07-02 | 2020-05-05 | 中国大唐集团新能源科学技术研究院有限公司 | Length-variable wind turbine blade device |
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| Publication number | Publication date |
|---|---|
| CN110374793B (en) | 2024-08-16 |
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