CN106837691A - Wind energy conversion system blast feather whole-process control device - Google Patents
Wind energy conversion system blast feather whole-process control device Download PDFInfo
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- CN106837691A CN106837691A CN201710176982.3A CN201710176982A CN106837691A CN 106837691 A CN106837691 A CN 106837691A CN 201710176982 A CN201710176982 A CN 201710176982A CN 106837691 A CN106837691 A CN 106837691A
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- depression bar
- energy conversion
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- wind energy
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 47
- 210000003746 feather Anatomy 0.000 title claims abstract description 40
- 238000004886 process control Methods 0.000 title claims abstract description 21
- 230000001360 synchronised effect Effects 0.000 claims abstract description 40
- 230000007246 mechanism Effects 0.000 claims abstract description 33
- 238000000034 method Methods 0.000 claims abstract description 10
- 230000009471 action Effects 0.000 claims description 19
- 230000008859 change Effects 0.000 claims description 17
- 229910000831 Steel Inorganic materials 0.000 claims description 11
- 239000010959 steel Substances 0.000 claims description 11
- 238000010276 construction Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 4
- 238000010079 rubber tapping Methods 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims 1
- 238000012423 maintenance Methods 0.000 abstract description 2
- 230000005611 electricity Effects 0.000 abstract 1
- 238000013507 mapping Methods 0.000 description 6
- 238000005452 bending Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 230000006378 damage Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000013536 elastomeric material Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 238000013519 translation Methods 0.000 description 2
- 230000005483 Hooke's law Effects 0.000 description 1
- 241000580063 Ipomopsis rubra Species 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 206010016256 fatigue Diseases 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
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- 239000007787 solid Substances 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
Classifications
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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
- F03D7/0224—Adjusting blade pitch
-
- 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
- F03D7/0264—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor for stopping; controlling in emergency situations
- F03D7/0268—Parking or storm protection
-
- 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
- F03D7/04—Automatic control; Regulation
-
- 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
- F05B2270/00—Control
- F05B2270/10—Purpose of the control system
- F05B2270/101—Purpose of the control system to control rotational speed (n)
- F05B2270/1014—Purpose of the control system to control rotational speed (n) to keep rotational speed constant
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- 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
- F05B2270/00—Control
- F05B2270/10—Purpose of the control system
- F05B2270/103—Purpose of the control system to affect the output of the engine
- F05B2270/1033—Power (if explicitly mentioned)
-
- 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
- F05B2270/00—Control
- F05B2270/30—Control parameters, e.g. input parameters
- F05B2270/32—Wind speeds
-
- 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
- F05B2270/00—Control
- F05B2270/50—Control logic embodiment by
- F05B2270/508—Control logic embodiment by mechanical means, e.g. levers, gears or cams
-
- 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)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Wind Motors (AREA)
Abstract
The present invention relates to wind energy conversion system rotating speed and the control set for adjusting field of power output, disclose a kind of wind energy conversion system blast feather whole-process control device, it includes wheel hub, blade and feather executing agency, feather executing agency includes pulp distance varying mechanism seat, pull bar, synchronous disk and shear Spring balanced unit, pulp distance varying mechanism seat is fixed on the left side of wheel hub, it is provided with conduit, synchronous disk is provided with conduit, shear Spring balanced unit includes hold-down support I, hold-down support II, depression bar I, depression bar II and balancing spring, the present invention is applied to small wind turbine, whole-process automatic regulation and control of the feather from 0 degree to 90 degree can be realized in wind energy conversion system operation, disastrous gale (being more than 25m/s) is met without maintenance on duty, autofeather is shut down；Being equipped with the wind energy conversion system of the present apparatus, to adapt to wind speed range wide, in the work wind speed range (3 25m/s) operation keep efficiently, steady, safety, noise is low, annual electricity generating capacity is high.
Description
Technical field
The present invention relates to wind energy conversion system rotating speed and the control set for adjusting field of power output, in particular to a kind of wind
Power machine blast feather whole-process control device.
Background technology
The work wind speed range of wind energy conversion system is typically 3-25m/s, in work wind speed range it is ensured that operation safe speed of rotation and
Stable output power, must automatic shutdown when more than cut-out wind speed 25m/s.Wind energy conversion system rotating speed and power output can be with wind speed
Increase and increase, if beyond the scope for allowing fatal harm will likely be caused to wind energy conversion system.To prevent wind energy conversion system overspeed
Must be regulated and controled with overpower, control methods have wind wheel to deviate wind direction, fixed pitch stall and change blade pitch angle etc., change
Blade pitch angle, is a kind of more advanced rational control methods, wherein many using mechanical centrifugal power, wind pressure, electric power or liquid
The pulp distance varying mechanisms such as power driving.
Megawatt-level wind unit uses contemporary advanced power electronics variable pitch control technology, though this technology is ripe,
If but it is directly indiscriminately imitated set use small wind turbine group, device fabrication cost is too high, and market is difficult to receive.Current some wind wheels
Rotating speed is less than 200r/min, and the Wind turbines with diameter greater than 10 meters are souning out supporting from the reduction of low price power electric component
Expense makes the pulp distance varying mechanisms such as electron electric power or hydraulic drive, and manufacturing cost is still higher, because of low price power electronics unit device
Part weatherability and stability difference often result in that equipment fault is multiple, operational reliability is poor, cause market reputation low, slack market.
Common wind speed round is higher than 200r/min, and wind energy conversion system of the diameter less than 6 meters typically uses mechanical centrifugal power feather.
The small wind turbine of existing use mechanical centrifugal power feather, is limited by mechanical centrifugal action principle and takes negative sense feather
Method, its effect is only to limit wind energy conversion system overspeed with negative propeller pitch angle formation aerodynamic drag in super rated wind speed, in excess
Determine that overpower can not be controlled when wind speed runs, and in super rated wind speed with negative propeller pitch angle continuous service, blade aerodynamic is carried
The alternate load super large such as lotus, inertia force, blade, paddle shaft, wind turbine main shaft and other failure of carrying Parts, damages, contracting
Short wind energy conversion system service life；Also one is noise severe overweight when it runs in super rated wind speed the drawbacks of prominent, to society
Meeting environment has undesirable effect.
The main method of blast feather regulation and control has wind wheel integral translation, the elasticity of deformable bending is configured in propeller shank
Material and blade twist feather etc..Wind wheel integral translation blast pulp distance varying mechanism, wind wheel inertia is larger, and wind speed and pressure is changed
Response is slow, parts wear is more serious, and can not realize wind energy conversion system from 0 degree to 90 degree the whole-process control of feather；Oar
The blast pitch mechanism of blade root elastomeric material bending, its propeller pitch angle adjustable range is small, elastomeric material fatiguability fails, operation
Service life is shorter.
The content of the invention
It is a primary object of the present invention to be directed to above-mentioned deficiency of the prior art, there is provided one kind can be right using blast change
Wind machine oar leaf propeller pitch angle realizes the purely mechanic device of whole-process control, and using wind speed increase, then wind pressure is increased, and wind speed reduction is then
The wind pressure changed with wind speed size, pulp distance varying mechanism is passed to by blade by the principle that wind pressure reduces, and with become oar
The regulation and control to blade pitch angle are implemented in spacing mechanism interaction, so as in rated wind speed to the difference between cut-out wind speed
The blade pitch angle corresponding with current wind speed for keeping wind energy conversion system rotating speed and stable output power can be obtained under wind speed.
To achieve these goals, the present invention uses following technical scheme：
A kind of wind energy conversion system blast feather whole-process control device, including wheel hub, blade and feather executing agency, wheel hub bag
Left side, right side and uniform hollow disc-shape nose circle face are included, spoke sleeve is fixed with nose circle face, be provided with spoke sleeve
Paddle shaft, paddle shaft and spoke sleeve coaxial line, can in spoke sleeve flexible rotating, paddle shaft the inner is provided with rocking arm, outward
End connection blade, the hollow disc-shape nose circle face is 3,4 or 6.
Chord of blade heart line is not conllinear with paddle shaft axis, sets an angle for bending, i.e. chord of blade heart line and paddle shaft
It is 3 degree~8 degree that angle is set between axis.
Feather executing agency includes pulp distance varying mechanism seat, pull bar, synchronous disk and shear Spring balanced unit, wherein, become
Pitch mechanism seat is fixed on the left side of wheel hub, and conduit is provided with pulp distance varying mechanism seat, and being provided with conduit can move along conduit
Dynamic synchronous disk, end of conduit is additionally provided with the adjusting nut of limits synchronization disk stroke.
Shear Spring balanced unit is located between synchronous disk and pulp distance varying mechanism seat, and one end and the rocking arm of pull bar are hinged, separately
One end is hinged with synchronous disk.
Shear Spring balanced unit includes hold-down support I, hold-down support II, depression bar I, depression bar II and balancing spring, fixed
Bearing II is fixed on pulp distance varying mechanism seat, and hold-down support I is located at synchronous disk lower section, is structure as a whole with synchronous disk, depression bar I 1
End is hinged with hold-down support I, and the other end is hinged with depression bar II, and the other end and the hold-down support II of depression bar II are hinged, balancing spring
It is mounted on the hinged place of depression bar I and depression bar II.
In the composition of shear Spring balanced unit：The first, then two sets of opposed installations of depression bar being hinged by centre will draw
Power spring is articulated in the termination of joint hinge axis, is configured to one group；Second, it is hinged by centre and is wound two sets of torque spring
The opposed installation of depression bar, is configured to one group.2~8 groups are can configure in shear Spring balanced unit.
Further, pulp distance varying mechanism seat, conduit, synchronous disk are coaxial, and hold-down support I and hold-down support II are in conduit week
Enclose and be uniformly distributed.
Further, depression bar I and depression bar II are connected by joint hinge axis, depression bar I and hold-down support I, depression bar II and solid
Determine bearing II and pass through depression bar pin connection.
Further, the balancing spring is extension spring, and extension spring is articulated in the termination of joint hinge axis.
Further, the balancing spring is torsion spring, and depression bar I, depression bar II and torsion spring are connected to one by joint hinge axis
Rise.
Further, 3,4 or 6, the hollow disc-shape nose circle face.
Further, depression bar I, depression bar II and balance spring assembly configuration 2-8 groups in shear Spring balanced unit.
Further, feathering latch-up structure is additionally provided between synchronous disk and hold-down support I, three is structure as a whole, suitable
Oar latch-up structure is the symmetrical enclosed construction of interior STH, and tapping is provided with locking steel ball, and locking steel ball inner side is provided with lock
Determine spring, corresponding conduit root is symmetrical arranged feathering lock hole, feathering is snapped in when synchronous disk down moves to locking steel ball
During lock hole, synchronous disk is locked, and wind energy conversion system enters feathering stopped status.
Further, also including unlocking structure, unlocking structure is arranged at pulp distance varying mechanism seat lower section, and it is two ends perforate
Enclosed construction, is internally provided with push rod spring, and unblock push rod one end is inserted into conduit through upper end perforate, and the other end is passed through down
End perforate exposes one section, is interacted with unblock rocking bar and cam.
Further, shear Spring balanced unit has 1/183 minification and 3.81/ for Action of Wind pressure power respectively
1 multiplication factor, adapts to the blast change of feather process in wind energy conversion system working range, realizes that 0 degree to 90 degree of propeller pitch angle is whole
Control.
The invention has the advantages that：
(1) present invention is entirely that machine components are constituted, novel in design, compact conformation, function reliability, it is easy to manufacture, cost
Cheap, assembling facility, adjustment is simple, long service life, it is adaptable to the severe running environment such as high and cold, heat, sleet, dust storm and
Extensive operational management condition；
(2) present invention have wide in range shear elastic force, can make shear Spring balanced unit balance elastic force change curve and
The instant Action of Wind pressure power change curve formed by current wind speed, corresponding target blade pitch angle can preferably be intended
Close.Fast response time is changed to wind speed, feather is sensitive, change with wind speed and change blade pitch angle at random, in wind energy conversion system fortune
Realize feather from 0 degree (Effec-tive Function) to 90 degree of whole-process automatic regulation and control of (feathering shutdown) in row；
(3) using positive feather, the propeller pitch angle for increasing blade with wind speed increases the present invention, and regulation process is steadily soft,
Wind wheel aerodynamic loading becomes small, and mechanical component abrasion is slight, long service life；
(4) wind energy conversion system for being equipped with blast feather whole-process control device of the invention has excellent anti-strong wind performance,
Disastrous gale (being more than 25m/s) is met without maintenance on duty, autofeather is shut down；
(5) present invention be suitably employed in 200 square metres of wind wheel sweeping area and within wind energy conversion system, be equipped with the present apparatus wind
It is wide that power machine adapts to wind speed range, in the work wind speed range (3-25m/s) operation keep efficiently, steady, safety, noise is low, year
Generated energy is high.
Brief description of the drawings
Fig. 1 is schematic structural view of the invention；
Fig. 2 is front view of the present invention；
Fig. 3 is feather executing agency of the present invention structural representation；
Fig. 4 is feather executing agency feathering stop lock status architecture schematic diagram of the present invention；
Wherein, above-mentioned accompanying drawing is marked including the following drawings：1st, blade；2nd, paddle shaft；3rd, spoke sleeve；4th, wheel hub；5th, shake
Arm；6th, pull bar；7th, synchronous disk；8th, hold-down support I；9th, depression bar I；10th, depression bar II；11st, pulp distance varying mechanism seat；12nd, hold-down support
Ⅱ；13rd, balancing spring；14th, joint hinge axis；15th, conduit；16th, depression bar pin；17th, adjusting nut；18th, steel ball is locked；19th, lock
Determine spring；20th, push rod is unlocked；21st, push rod spring；22nd, rocking bar and cam are unlocked；23rd, feathering lock hole；24th, paddle shaft axis；
25th, chord of blade heart line；
α is the angle between depression bar I and depression bar II；P is the Action of Wind pressure power from blade；F is shear Spring balanced list
The balance elastic force of unit.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings.
Embodiment 1
As shown in figure 1, wind energy conversion system blast feather whole-process control device of the invention, including wheel hub 4, blade 1 and change oar
Away from executing agency, wheel hub includes left side, right side and 3 uniform hollow disc-shape nose circle faces, one is fixed on each nose circle face
Individual spoke sleeve 3, is provided with paddle shaft 2, paddle shaft and spoke sleeve coaxial line in spoke sleeve, paddle shaft can be in spoke sleeve
Interior flexible rotating, paddle shaft the inner is provided with the Rocker arm 5 that can rotate paddle shaft, and outer end is provided with the ring flange of connection blade,
Blade is fixed on ring flange, and ring flange has an angle for bending, makes chord of blade heart line 25 and paddle shaft axis after assembling
There is certain angle, as shown in Fig. 2 the angle is 3 degree in the present embodiment between 24.
As shown in Figure 1,3, feather executing agency includes pulp distance varying mechanism seat 11, pull bar 6, synchronous disk 7 and shear elastic force
Balancing unit, wherein, pulp distance varying mechanism seat is fixed on the left side of wheel hub, and conduit 15, conduit are provided with pulp distance varying mechanism seat
On be provided with the synchronous disk 7 that can be moved along conduit, conduit top be additionally provided with the adjusting nut 17 of limits synchronization disk stroke, pull bar
One end is hinged with rocking arm, and the other end is hinged with synchronous disk；Shear Spring balanced unit is located at synchronous disk and pulp distance varying mechanism seat
Between, it includes hold-down support I 8, hold-down support II 12, depression bar I 9, depression bar II 10 and balancing spring 13, and hold-down support II is fixed on
On pulp distance varying mechanism seat, hold-down support I is located at synchronous disk lower section, is structure as a whole with synchronous disk, conduit, synchronous disk, fixed branch
Seat I and hold-down support II are coaxial, and the one end of depression bar I is connected with hold-down support I by depression bar pin 16, and the other end passes through with depression bar II
Joint hinge axis 14 is connected, and with hold-down support II by depression bar pin connection, balancing spring is mounted on depression bar I to the other end of depression bar II
With the hinged place of depression bar II.
Balancing spring can use extension spring or torsion spring, and according to extension spring, then extension spring is articulated in the termination of joint hinge axis, if
Using torsion spring, then torsion spring is linked together with depression bar I and depression bar II by joint hinge axis.In the present embodiment, depression bar I, depression bar
II and extension spring (or torsion spring) configure two groups.
When disastrous gale weather is run into, because wind speed is larger, to avoid the infringement to wind energy conversion system, it is necessary to wind energy conversion system
Stoppage protection is carried out, therefore the present invention is additionally provided with shutdown protector --- it is arranged between synchronous disk and hold-down support I
Feathering latch-up structure, synchronous disk, feathering latch-up structure and the three of hold-down support I are structure as a whole, and feathering latch-up structure is inner side
The symmetrical enclosed construction of perforate, tapping is provided with locking steel ball 18, and locking steel ball inner side is provided with Lock spring 19, corresponding
, conduit root is symmetrically arranged with feathering lock hole 23, when synchronous disk down moves to locking steel ball snaps in feathering lock hole,
Synchronous disk is locked, and wind energy conversion system enters feathering stopped status.
Corresponding with feathering latch-up structure, present invention additionally comprises unlocking structure, unlocking structure is arranged at pulp distance varying mechanism
Seat lower section, it is the enclosed construction of two ends perforate, is internally provided with push rod spring 21, and unblock push rod 20 one end passes through upper end perforate
It is inserted into conduit, the other end exposes one section through lower end perforate, is interacted with unblock rocking bar and cam 22.
Due to the angle that chord of blade heart line bends to paddle shaft axis, oar will be made when having wind pressure on blade blade face
Leaf is rotated around paddle shaft, changes former blade pitch angle this moment.In rated wind speed, wind energy conversion system is run with rated speed, output
Rated power, blade pitch angle is arranged on best angle (0 degree)；Blast of the wind speed increased when more than rated wind speed to blade
Power increases, and blade is rotated around paddle shaft and increases propeller pitch angle, wind energy conversion system is still maintained rated speed and volume the release of wind energy increment
Determine power output.Wind speed increases then wind pressure and increases under normality, but increases the pneumatic of it with propeller pitch angle for blade
Pressure coefficient reduction, wind pressure on practical function to blade might not be increased with closing wind speed and increasing, it and blade pitch
The magnitude relationship at angle is very big.Learnt by air force theoretical calculation：Increase with wind speed in wind energy conversion system work wind speed range, by perseverance
Correspondence air speed value increases blade pitch angle to power standard simultaneously, and the Changing Pattern of the wind pressure being applied on blade is：Specified
The wind pressure that wind speed is applied on blade to one section (about 11~14m/s) of super 3~4m/s of rated wind speed skyrockets, in wind speed 15m/
S reaches the increase and the increasing of blade pitch angle with wind speed after peak value, and the wind pressure on practical function to blade is persistently delaying
Drop, drops suddenly after more than 22~23m/s wind speed, and in feathering, (90 degree of propeller pitch angle) is applied to the wind pressure convergence on blade
Zero.
In view of above-mentioned wind speed increases, blade pitch angle blade synchronously increases the Changing Pattern of blade wind pressure, relies solely on
Follow Hooke's law (power with linear change) change spring go to track and then balance the wind pressure from blade be can not
Can.Therefore need to configure a kind of shear mechanism with high magnification numbe contracting, playing function between blade wind pressure and balance elastic force.
Wind pressure and blade pitch angle in wind energy conversion system operation on wind speed, blade, all in change, is after rated wind speed
Each different wind speed Duan Junneng go out to maintain wind energy conversion system rated speed and rated output power with wind speed change real-time regulation
Blade pitch angle, is configured with shear Spring balanced unit, and change and the stochastic equilibrium of wind speed are tracked by it, realizes current wind speed
Must corresponding blade pitch angle.
By taking the shear Spring balanced unit that one group of tangent mapping device is constituted as an example, if the folder between depression bar I and depression bar II
Angle is α, and P is the Action of Wind pressure power from blade；F is the balance elastic force of shear Spring balanced unit：
When the wind pressure P from blade acts on shear Spring balanced unit, active force P and shear Spring balanced unit
Balance elastic force F relations between the two be：F=Pctg (α/2).For example apply active force P=100N, depression bar within angle α
=175 degree, component maintain balance condition be：F=Pctg (α/2)=100N × ctg (175 °/2)=4.37N.And with three
The shear Spring balanced unit that group tangent mapping device is constituted, balance elastic force is F=needed for its each group of tangent mapping device
4.37N ÷ 3=1.46N.
The function of being less than shear Spring balanced unit after 90 degree in depression bar within angle α is transferred to amplification by reducing.Such as depression bar
Within angle α=10 degree, apply both active force P=100N, balance elastic force F and Action of Wind pressure power P of shear Spring balanced unit
Between maintain balance condition be F=Pctg (α/2)=100N × ctg10 °/2)=1143N.And with three groups of tangent transcribers
The shear Spring balanced unit required balance elastic force of its each group of tangent mapping device that structure is constituted is F=41143N ÷ 3=381N.
By that analogy, during depression bar within angle α=175 degree, with the shear Spring balanced list that three groups of tangent mapping devices are constituted
As a example by unit, it has 1/68 scaling multiple for Action of Wind pressure power；As a example by five groups, it has 1/ for Action of Wind pressure power
113 scaling multiple；As a example by eight groups, it has 1/183 scaling multiple for Action of Wind pressure power.When depression bar within angle α=
At 10 degree by taking three groups of shear Spring balanced units of tangent mapping device composition as an example, it has 3.81/1 for Action of Wind pressure power
Multiplication factor；As a example by five groups, it has 2.29/1 multiplication factor for Action of Wind pressure power；As a example by eight groups, it for
Action of Wind pressure power has 1.43/1 multiplication factor.
" increase with wind speed, correspondence wind speed increases increasing blade pitch angle simultaneously, is applied to the blast on blade for above-mentioned
The Changing Pattern of power ", is skyrocketed the stage in super rated wind speed blade wind pressure, and shear Spring balanced unit can be arranged on minimum
Elastic force F, Action of Wind pressure power P with hundred times from blade implements balance.Similarly, continue in the wind pressure being applied on blade
Slow drop, steep depression of order section amplify Action of Wind pressure power, make every effort to realize blast feather whole-process control in wind energy conversion system working range.
The angle modification scope whole process of feather is 0-90 degree, accordingly can by the Action of Wind pressure power P from blade and
The calculating data of required balance elastic force are set：1. wind speed-rated wind speed is cut, blade pitch angle is optimum efficiency state 0
Degree, is set near depression bar within angle α=175 degree；2. rated wind speed-cut-out wind speed 25m/s, blade pitch angle is 0-28 degree, is
The extremely crucial modification scope of blade pitch angle.The target of its regulation and control is in rated wind speed to the variant wind between cut-out wind speed
The force variation curve and blade Action of Wind pressure power change curve for enabling shear Spring balanced unit under speed are preferably fitted, real
When obtain corresponding with current wind speed blade pitch angle to maintain wind energy conversion system in rated speed rated power output state；3. surpass
Cut-out wind speed (>=25m/s) is crossed, it is 90 degree to shut down full feathering state blade pitch angle, it is 15-25 degree to set depression bar within angle α.
When wind energy conversion system runs, act on the wind pressure on blade and torque is produced to paddle shaft, the inner rocking arm of paddle shaft turns
Move, linked synchronous disk by pull bar, synchronous disk is moved back and forth along the conduit being fixed on pulp distance varying mechanism seat, in synchronous disk bearing
Shear Spring balanced unit, elastic force and the blade Action of Wind pressure of shear Spring balanced unit are installed between pulp distance varying mechanism seat
Power is put forth effort on synchronous disk and is interacted, and forms dynamic equilibrium and changes blade pitch angle in real time.
When wind speed becomes 90 degree more than 25m/s (can set) blade pitch angle, from the Action of Wind pressure power on blade through pull bar
Pull synchronous disk to be moved to pulp distance varying mechanism seat direction, be locked when synchronous disk at feathering lock hole is moved to, wind energy conversion system enters
Feathering stopped status；After disastrous gale, operation wind turbine tower bar bottom control stick pulls tower top by steel wire cable
Rocker cam mechanism extruding unblock push rod releases the locking of synchronous disk, and blade pitch angle returns to optimal propeller pitch angle (0 degree).
Embodiment 2
The present embodiment is that wheel hub includes left side, right side and 4 uniform hollow disc-shapes with the difference of embodiment 1
Nose circle face, that is to say, that blade has 4, the angle after assembling between chord of blade heart line and paddle shaft axis is 5 degree, shear elastic force
Depression bar I, depression bar II and extension spring (or torsion spring) configuration component are 5 groups in balancing unit.
Remaining is same as Example 1.
Embodiment 3
The present embodiment is that wheel hub includes left side, right side and 6 uniform hollow disc-shapes with the difference of embodiment 1
Nose circle face, that is to say, that blade has 6, the angle after assembling between chord of blade heart line and paddle shaft axis is 8 degree, shear elastic force
Depression bar I, depression bar II and extension spring (or torsion spring) configuration component are 8 groups in balancing unit.
Remaining is same as Example 1.
The preferred embodiments of the present invention are the foregoing is only, is not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.It is all within the spirit and principles in the present invention, made any repair
Change, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (10)
1. a kind of wind energy conversion system blast feather whole-process control device, including wheel hub (4), blade (1) and feather executing agency, wheel
Hub (4) includes left side, right side and uniform hollow disc-shape nose circle face, and spoke sleeve (3), spoke set are fixed with nose circle face
Paddle shaft (2) is installed, paddle shaft (2) the inner is provided with rocking arm (5), and outer end connects blade (1), chord of blade heart line in cylinder (3)
It is (25) conllinear with paddle shaft axis (24), it is characterised in that
Feather executing agency includes pulp distance varying mechanism seat (11), pull bar (6), synchronous disk (7) and shear Spring balanced unit, its
In, pulp distance varying mechanism seat (11) is fixed on the left side of wheel hub (4), and conduit (15) is provided with pulp distance varying mechanism seat (11), leads
Being provided with pipe (15) can be additionally provided with limits synchronization disk (7) stroke along the mobile synchronous disk (7) of conduit (15), conduit (15) top
Adjusting nut (17), one end and the rocking arm (5) of pull bar (6) be hinged, and the other end is hinged with synchronous disk (7)；
Shear Spring balanced unit includes hold-down support I (8), hold-down support II (12), depression bar I (9), depression bar II (10) and balance
Spring (13), hold-down support II (12) is fixed on pulp distance varying mechanism seat (11), and hold-down support I (8) is under synchronous disk (7)
Side, is structure as a whole with synchronous disk (7), and the one end of depression bar I (9) is hinged with hold-down support I (8), and the other end cuts with scissors with depression bar II (10)
Connect, the other end and the hold-down support II (12) of depression bar II (10) are hinged, balancing spring (13) is mounted on depression bar I (9) and depression bar II
(10) hinged place.
2. wind energy conversion system blast feather whole-process control device according to claim 1, it is characterised in that pulp distance varying mechanism seat
(11), conduit (15), synchronous disk (7) are coaxial, and hold-down support I (8) and hold-down support II (12) are uniform around conduit (15)
Distribution.
3. wind energy conversion system blast feather whole-process control device according to claim 1, it is characterised in that depression bar I (9) and pressure
Bar II (10) is by joint hinge axis (14) connection, depression bar I (9) and hold-down support I (8), depression bar II (10) and hold-down support II
(12) connected by depression bar pin (16).
4. wind energy conversion system blast feather whole-process control device according to claim 3, it is characterised in that the balancing spring
(13) it is extension spring, extension spring is articulated in the termination of joint hinge axis (14).
5. wind energy conversion system blast feather whole-process control device according to claim 3, it is characterised in that the balancing spring
(13) it is torsion spring, depression bar I (9), depression bar II (10) and torsion spring are linked together by joint hinge axis (14).
6. wind energy conversion system blast feather whole-process control device according to claim 1, it is characterised in that the hollow disc-shape
Nose circle face is 3,4 or 6.
7. wind energy conversion system blast feather whole-process control device according to claim 1, it is characterised in that shear Spring balanced
Depression bar I (9), depression bar II (10) and balancing spring (13) component Configuration 2-8 groups in unit.
8. wind energy conversion system blast feather whole-process control device according to claim 1, it is characterised in that synchronous disk (7) with
Feathering latch-up structure is additionally provided between hold-down support I (8), three is structure as a whole, feathering latch-up structure is interior STH
Symmetrical enclosed construction, tapping is provided with locking steel ball (18), and locking steel ball (18) inner side is provided with Lock spring (19), relatively
Answer, conduit (15) root is symmetrical arranged feathering lock hole (23), snapped in when synchronous disk (7) down moves to locking steel ball (18)
During feathering lock hole (23), synchronous disk (7) is locked, and wind energy conversion system enters feathering stopped status.
9. wind energy conversion system blast feather whole-process control device according to claim 8, it is characterised in that also tied including unblock
Structure, unlocking structure is arranged at pulp distance varying mechanism seat (11) lower section, and it is the enclosed construction of two ends perforate, is internally provided with push rod bullet
Spring (21), unblock push rod (20) one end is inserted into conduit (15) through upper end perforate, and the other end exposes one through lower end perforate
Cut, interacted with unblock rocking bar and cam (22).
10. wind energy conversion system blast feather whole-process control device according to claim 1, it is characterised in that shear elastic force is put down
Weighing apparatus unit has 1/183 minification and 3.81/1 multiplication factor for Action of Wind pressure power respectively, adapts to wind energy conversion system work
In the range of feather process blast change, realize 0 degree to 90 degree whole-process control of propeller pitch angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710176982.3A CN106837691A (en) | 2017-03-22 | 2017-03-22 | Wind energy conversion system blast feather whole-process control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710176982.3A CN106837691A (en) | 2017-03-22 | 2017-03-22 | Wind energy conversion system blast feather whole-process control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106837691A true CN106837691A (en) | 2017-06-13 |
Family
ID=59129747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710176982.3A Withdrawn CN106837691A (en) | 2017-03-22 | 2017-03-22 | Wind energy conversion system blast feather whole-process control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106837691A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114162338A (en) * | 2021-11-04 | 2022-03-11 | 中国空气动力研究与发展中心低速空气动力研究所 | Coaxial contra-rotating propeller transmission system capable of independently changing pitch |
-
2017
- 2017-03-22 CN CN201710176982.3A patent/CN106837691A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114162338A (en) * | 2021-11-04 | 2022-03-11 | 中国空气动力研究与发展中心低速空气动力研究所 | Coaxial contra-rotating propeller transmission system capable of independently changing pitch |
| CN114162338B (en) * | 2021-11-04 | 2023-06-06 | 中国空气动力研究与发展中心低速空气动力研究所 | Coaxial contra-rotating propeller transmission system capable of independently changing pitch |
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