CN109441736A - Blade locking device, wind generating set and control method of variable pitch motor - Google Patents
Blade locking device, wind generating set and control method of variable pitch motor Download PDFInfo
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- CN109441736A CN109441736A CN201811632563.7A CN201811632563A CN109441736A CN 109441736 A CN109441736 A CN 109441736A CN 201811632563 A CN201811632563 A CN 201811632563A CN 109441736 A CN109441736 A CN 109441736A
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- 230000003287 optical effect Effects 0.000 claims description 18
- 238000005452 bending Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000002708 enhancing effect Effects 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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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
- F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
-
- 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
-
- 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
- F05B2270/328—Blade pitch angle
-
- 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 invention provides a blade locking device, a wind generating set and a control method of a variable pitch motor, wherein the blade locking device comprises: the limiting piece is fixed on one of an outer ring and an inner ring of a variable pitch bearing of the wind generating set, which is connected with the blade; and the limiting lock is fixed on a hub of the wind generating set, wherein the limiting lock can move between a first position for locking the blade and a second position for releasing the blade through the limiting part along with the rotation of the outer ring or the inner ring. According to the blade locking device of the wind generating set and the wind generating set, the safety of the wind generating set can be ensured, and the adaptability of the wind generating set to the environment can be enhanced.
Description
Technical field
The present invention relates to a kind of blade locking arrangement of wind power generating set, wind power generating set and wind power generating sets
The control method of pitch motor.
Background technique
In wind power generating set operation, different amblent air temperatures can be encountered, for example, applying the wind-force hair in coastal area
Motor group can frequently suffer from the bad working environments such as typhoon.In this case, the wind load of typhoon is instantaneous, huge and uncontrollable
, there is a possibility that more than wind power generating set design limit.For example, huge wind load can impact blower, toothed belt is broken,
At this point, blade under the action of aerodynamic loading and inertia, will rotate freely around 360 ° of blower axis, and out-of-control phenomenon occur.In wind
Under power generator group normal operating condition, the normal variable pitch angle of blade is generally 0 °~90 °, and blade infinite place out of control,
Can not also it stop in 90 ° of extreme positions.When blade rotates 180 °, blade is it is possible that sweep tower movement, so as to cause leaf
Piece fractures, and causes wind power generating set impaired, or even tower.In order to avoid blade out-of-control phenomenon, need to design blade limit dress
It sets, absorb the wind load of typhoon and plays position-limiting action, protect the safety of wind power generating set.
Summary of the invention
For wind power generating set, blade infinite place and problem out of control, the present invention provide one under the adverse circumstances such as typhoon
The blade locking arrangement and wind power generating set of kind wind power generating set, it can be ensured that the safety of wind power generating set, enhancing
Adaptability of the wind power generating set to environment.
According to an aspect of the present invention, a kind of blade locking arrangement of wind power generating set, blade locking arrangement packet are provided
It includes: locating part, one of being connect with blade in the outer ring and inner ring of the pitch variable bearings of the fixed wind power generating set of locating part；
Limiting lock, limiting lock are fixed on the wheel hub of wind power generating set, wherein limiting lock can be by locating part with outer ring and inner ring
In the one rotation and locking blade first position and discharge blade the second position between move.
Preferably, locating part may include groove, when limiting lock in the grooves when, blade is locked.
Preferably, groove may include the first concave portion and the second concave portion, and the first concave portion is to the resistance of limiting lock and
Two concave portions are different to the resistance of limiting lock.
Preferably, the radius of curvature of the first concave portion is smaller than the radius of curvature of the second concave portion.
Preferably, the skin-friction coefficient of the first concave portion can be greater than the skin-friction coefficient of the second concave portion.
Preferably, the skin-friction coefficient on the surface of limiting lock contacted with the first concave portion can be greater than and the second concave portion
The skin-friction coefficient on the surface of contact.
Preferably, groove may be provided at the first end and/or the second end in the circumferential direction of pitch variable bearings of locating part
Place.
Preferably, locating part may include along the curved portion of the circumferentially extending of pitch variable bearings, and groove is formed in curved portion.
Preferably, limiting lock may include fixed part, elastic supporting member for supporting optical member and sticking department, and fixed part is fixed on wheel hub, elasticity
One end of supporting element is fixed on fixed part, and the other end is connected to sticking department.
Preferably, fixed part may include guide portion, and guide portion guiding locking portion transports between the first position and the second position
It is dynamic.
According to another aspect of the present invention, a kind of wind power generating set is provided, wind power generating set includes as described above
Blade locking arrangement.
According to another aspect of the present invention, a kind of control method of the pitch motor of wind power generating set, wind-force hair are provided
Motor group includes blade locking arrangement as described above, and control method includes: driving pitch motor, makes the institute in outer ring and inner ring
One rotation is stated, so that limiting lock is inserted into groove；Pitch motor is set to provide brake force, to lock blade；When environment wind load
When less than predetermined wind load, pitch motor is driven, rotates the one in outer ring and inner ring, so that limiting lock is moved back from groove
Out.
Preferably, pitch motor is made to provide brake force, to lock blade the step of includes: to make pitch motor to outer ring and interior
The sum of moment of friction between the braking moment and limiting lock and groove of the periphery of the one in circle is greater than environment wind load
Torque.
Preferably, the step of driving pitch motor, rotating the one in outer ring and inner ring includes: to make pitch motor
The sum of torque of driving moment and environment wind load to the periphery of the one in outer ring and inner ring is greater than limiting lock and groove
Between moment of friction.
The blade locking arrangement and wind power generating set of wind power generating set according to the present invention, it can be ensured that disliked in typhoon etc.
The safety of bad operating condition apparatus for lower wind generating set, adaptability of the enhancing wind power generating set to environment.
In addition, the blade locking arrangement and wind power generating set of wind power generating set according to the present invention, may include tool
There is the groove of the concave portion of different curvature radius or coefficient of friction, so as to further save change by the blade locking arrangement
The electromagnetic system power of paddle motor, and it is easy to discharge locking, in addition, the side of vane propeller-changing range is arranged in such groove structure
At boundary, influence of the blade locking arrangement to the normal variable pitch of blade is avoided.
Detailed description of the invention
Fig. 1 is the leaf being mounted on wheel hub and pitch variable bearings for showing the wind power generating set of embodiment according to the present invention
The perspective view of piece locking device.
Fig. 2 is the leaf being mounted on wheel hub and pitch variable bearings for showing the wind power generating set of embodiment according to the present invention
The partial enlarged view of piece locking device.
Fig. 3 is the signal for showing the locating part of the blade locking arrangement of wind power generating set of embodiment according to the present invention
Figure.
Fig. 4 is the inside for showing the limiting lock of the blade locking arrangement of wind power generating set of embodiment according to the present invention
Schematic diagram.
Fig. 5 is to show being mounted on wheel hub and pitch variable bearings of wind power generating set according to another embodiment of the present invention
Blade locking arrangement perspective view.
Fig. 6 is the wind load resistance system for showing the blade locking arrangement of the wind power generating set using embodiment according to the present invention
The stress diagram of dynamic locking.
Fig. 7 is to show the limiting lock of the blade locking arrangement of wind power generating set of embodiment according to the present invention to exit lock
Fixed stress diagram.
Drawing reference numeral explanation:
100: locating part, 110: curved portion, 120: groove, 121: the first concave portions, 122: the second concave portions, 200: limit
Lock, 210: fixed part, 211: guide portion, 212: connecting plate, 213: reinforcing rib, 220: elastic supporting member for supporting optical member, 230: sticking department, 20:
Pitch variable bearings, 21: outer ring, 22: inner ring, 30: wheel hub, 31: pitch drive bracket.
Specific embodiment
Hereinafter reference will be made to the drawings a more complete description the embodiment of the present invention.The invention is shown in the accompanying drawings exemplary
Embodiment.In the accompanying drawings, identical label always shows identical component.
In Fig. 1 and Fig. 5, in order to show blade locking arrangement according to the present invention, by the outer ring 21 of pitch variable bearings 20
Part and toothed belt (see Fig. 2) omission are shown.Fig. 2 is showing blade locking arrangement and outer ring 21 with side shown in FIG. 1
Back to side partial illustrations.
The blade locking arrangement of wind power generating set according to the present invention includes locating part 100 and limiting lock 200.Locating part
100 are fixed on one of connecting with blade in the outer ring 21 and inner ring 22 of the pitch variable bearings 20 of wind power generating set, limit
Lock 200 is fixed on the wheel hub 30 of wind power generating set, wherein limiting lock 200 can be by locating part 100 with outer ring 21 and interior
Circle 22 in the one rotation and locking blade first position and discharge blade the second position between move.
As depicted in figs. 1 and 2, pitch variable bearings 20 can rotate for outer ring 21, and blade (not shown) may be connected to outer ring 21, limit
Position part 100 can be fixed on the side back to blade of outer ring 21, for example, can be formed on locating part 100 and the spiral shell of outer ring 21
The corresponding bolt hole of keyhole, locating part 100 to be fixed on outer ring 21 by fasteners such as bolts.Limiting lock 200 is fixed on
On the wheel hub 30 of wind power generating set, as shown in Figure 2, it can be fixed on the pitch drive bracket 31 of wheel hub 30.But limiting lock
200 fixation position is without being limited thereto, can also be fixed on the other component of wheel hub 30.
As shown in Figures 2 and 3, locating part 100 may include the curved portion 110 along the circumferentially extending of pitch variable bearings 20, arc
Fluted 120 are formed in shape portion 110.In this case, limiting lock 200 is inserted into groove 120 and can be from recessed
It is exited in slot 120, to be moved between the first position of locking blade and the second position for discharging blade.
When limiting lock 200 is located in groove 120, locating part 100 can be locked relative to the position of limiting lock 200, with
Lock the rotary motion of outer ring 21, that is to say, that the blade for being connected to outer ring 21 can be locked.When limiting lock 200 is from groove 120
In when exiting, the locking between locating part 100 and limiting lock 200 is released, and outer ring 21 is freely rotatable, that is to say, that connection
Blade to outer ring 21 can be released.
As an example, referring to Fig. 4, limiting lock 200 may include fixed part 210, elastic supporting member for supporting optical member 220 and sticking department 230, Gu
Determine portion 210 to be fixed on wheel hub 30, one end of elastic supporting member for supporting optical member 220 is fixed on fixed part 210, and the other end is connected to sticking department
230.Sticking department 230 is formed as pin-shaped formula, but not limited to this, after installing blade locking arrangement, sticking department 230 can be withstood on
On locating part 100 (that is, curved portion 110 or groove 120), elastic supporting member for supporting optical member 220 can be in compressive state always, so that elasticity branch
Support member 220 can apply the thrust towards locating part 100 to sticking department 230.In this case, the curved portion 110 of locating part 100
The surface contacted with limiting lock 200 in the part other than forming groove 120 can have smooth surface.In this way, working as
When locating part 100 is rotated with outer ring 21, limiting lock 200 can abut against curved portion under the thrust of elastic supporting member for supporting optical member 220
110 smooth surface sliding, when the rotation of locating part 100 to make groove 120 and 200 position of limiting lock to it is corresponding when sticking department
230 are inserted into groove 120 under the thrust of elastic supporting member for supporting optical member 220, realize locking.When needing to discharge locking, can drive
Dynamic outer ring 21 rotates, so that locating part 100, relative to 200 rotary motion of limiting lock, elastic supporting member for supporting optical member 220 passes through groove 120
The extruding on surface and further compress it is sliding so that sticking department 230 can be exited from groove 120 with the rotation of locating part 100
To the smooth surface of curved portion 110.Elastic supporting member for supporting optical member 220 can be spring or elastic slice etc..
Fixed part 210 may include guide portion 211 and connecting plate 212, and the bootable sticking department 230 of guide portion 211 is at first
It sets and is moved between the second position, entire limiting lock 200 can be fixed on wheel hub by connecting plate 212.For example, as shown in Fig. 2, drawing
It leads portion 211 and is formed as the sleeve being integrally formed with connecting plate 212, sticking department 230 can be located in sleeve, and sleeve can protect elasticity
Supporting element 220 and sticking department 230, and the amplitude of oscillation of sticking department 230 or so can be limited, it is excessive to prevent sticking department 230 from swinging
The problems such as causing the elastic supporting member for supporting optical member 220 of such as spring to be more than elastic limit and damage.
Shape, size of connecting plate 212 etc. are not particularly limited, as long as it is capable of fixing wheel hub 30 and supports entire
Limiting lock 200.As shown in Figure 1, one end of connecting plate 212 can be fixed on pitch drive bracket 31, elastic supporting member for supporting optical member 220
It is fixed on sticking department 230 on the other end of connecting plate 212.According to the setting position of limiting lock and installation space, connecting plate 212
It may be formed to have bending part, fixed part 210 may also include reinforcing rib 213, and connecting plate is tiltably arranged in reinforcing rib 213
At 212 bending part, the part of the bending part two sides of connecting plate 212 is supported, structural strengthening is played the role of.
Although without being limited thereto described above is the specific configuration of limiting lock 200, for example, it may be alternatively formed to lead to
Component or any other linear reciprocal movement device that hydraulic principle realizes stretching motion are crossed, as long as it can pass through locating part
100 rotation and locking blade first position and discharge blade the second position between move.
In addition, although herein with the rotation of the outer rings 21 of pitch variable bearings 20 and locating part 100 is fixed on pitch variable bearings 20
It is described in case where on outer ring 21, but pitch variable bearings 20 are also possible to the rotation of inner ring 22 and locating part 100 is fixed on
On the inner ring 22 of pitch variable bearings 20, for example, locating part 100 can be fixed on the side back to blade of inner ring 22, groove 120 can
It is formed at position corresponding with the inner periphery of inner ring 20, limiting lock 200 can be inserted in groove from the outwardly direction of the center of circle
In 120.
Groove 120 may include the first concave portion 121 and the second concave portion 122, and in the present embodiment, sticking department 230 can be from
Any one of first concave portion 121 and the second concave portion 122 enter groove, and can be recessed from the first concave portion 121 and second
Enter any one of portion 122 and exits groove.
In above-mentioned blade locking arrangement, when the bad weathers such as typhoon will be met with by predicting wind power generating set, it can lead to
Pitch motor drives outer ring 21 to rotate, so that locating part 100 rotates, so that limiting lock 200 is slided along the surface of curved portion 110
To the groove 120 of locating part 100, blade is locked.Blade can be at the state of putting away the oars at this time.After typhoon disappearance,
Under the driving of pitch motor, locating part 100 is rotated with outer ring 21, and elastic supporting member for supporting optical member 220 is pressed in the case where the surface of groove 120 squeezes
Contracting, sticking department 230 move upwards, and groove 120 is exited in the preparation of sticking department 230, at this time, it is ensured that the driving torque of pitch motor is greater than
Moment of friction between sticking department 230 and groove 120, so that sticking department 230 be enable smoothly to exit groove 120.
In an embodiment according to the present invention, the center of circle corresponding between the both ends of locating part 100 with arcuate shape
Angle may be slightly larger than the maximum rotation angle of vane propeller-changing, and be rotated by the first extreme position of variable pitch to second limit in blade
During position, central angle corresponding to the maximum circumferential distance between groove 120 and sticking department 230 should be less than vane propeller-changing
Maximum rotation angle, with can be by the driving of pitch motor so that the rotation of groove 120 of locating part 100 is to limiting lock 200
Position, to be locked.In the above-described embodiments, groove 120 may be formed at any position of locating part 100, however,
In such a configuration, if groove 120 is formed in the middle position of locating part 100, when not meeting with typhoon, in leaf
During the normal variable pitch of piece, groove 120 is possible to that the position of sticking department 230 can be passed through, and sticking department 230 can be inserted into groove
In 120, unwanted locking is formed, at this point, outer ring 21 can be driven to continue to revolve by increasing the driving force that pitch motor provides
Turn, locking torque is overcome, to unlock.
Below with reference to the blade locking arrangement of Fig. 5 description according to another embodiment of the present invention.
In blade locking arrangement according to another embodiment of the present invention, and above with reference to blade lock described in Fig. 1
The difference for determining device is only that groove 120.
Due to vane propeller-changing need within the scope of certain angle, the greatest limit between groove 120 and limiting lock 200
The corresponding central angle of circumferential distance should be in the range of the maximum angle θ of vane propeller-changing be to (θ -5 °), without carrying out blade
Groove 120 does not interfere the normal variable pitch of blade when locking, for example, as shown in figure 5, two ends of the locating part 100 with arc
Corresponding central angle may be slightly larger than the maximum angle of vane propeller-changing between portion, and the first end of locating part 100 is arranged in groove 120
Place, when blade is in the first variable pitch limiting angle, limiting lock 200 is located at the second end of locating part 100, limiting lock 200 with it is recessed
The corresponding central angle of circumferential distance between slot 120 is in the range of θ is to (θ -5 °).With vane propeller-changing, limiting lock 200 along
The surface of the curved portion of locating part 100 is slided, and groove 120 is moved closer to, until when blade closes on maximum variable pitch angle position, limit
Position lock 200 just can be plugged into groove 120.That is, when blade does not rotate to maximum variable pitch angle, blade locking arrangement
It will not interfere with the variable pitch of blade, in this way, can reduce in the influence for not needing blade lock timing blade locking arrangement to vane propeller-changing.
In the case, as shown in figure 5, groove 120 according to another embodiment of the present invention can be in the week of pitch variable bearings
It upwards include the first concave portion 121 and the second concave portion 122.
First concave portion 121 can be arranged close to the first end of locating part 100, and the second concave portion 122 can be recessed relative to first
Enter portion 121 to be arranged far from first end.Since groove 120 is located at the end position of locating part 100, in locking, sticking department
230 only can enter groove 120 from the side of groove 120, in unlock, make sticking department 230 by reversely rotating locating part 100
It is exited from the side of groove 120.That is, in the 5 embodiment of figure 5, sticking department 230 can be from 122 side of the second concave portion
It is exited into groove, and from 122 side of the second concave portion, therefore, in design, the first concave portion 121 can not be considered for locking
The entrance in portion 230 and the influence exited, and it is made to provide bigger locking torque as much as possible.
First concave portion 121 can be different to the resistance of limiting lock 200 from the second concave portion 122 to the resistance of limiting lock 200.
Specifically, compared with the second concave portion 122 far from first end, the first of the close first end of groove 120 is recessed
Entering portion 121 can have a relatively small radius of curvature, in this way, in the locked state, when elastic supporting member for supporting optical member 220 is to sticking department 230
One timing of thrust, the frictional resistance between limiting lock 200 and the first concave portion 121 can be greater than limiting lock 200 and the second concave portion
Frictional resistance between 122.The arm of force of the frictional resistance of first concave portion 121 and the second concave portion 122 can be approximately equal, because
This, the moment of friction between the first concave portion 121 and limiting lock 200 can be greater than between the second concave portion 122 and limiting lock 200
Moment of friction.
When exiting locking, limiting lock 200 can be from the second concave portion with relatively large radius of curvature of groove 120
122 sides are smoothly withdrawn on the smooth surface of curved portion 110.
By taking Fig. 5 as an example, when needing to lock blade, the outer ring 21 of pitch variable bearings 20 can be driven by pitch motor
It rotates clockwise, so that locating part 100 is rotated with outer ring 21 to the position of limiting lock 200, sticking department 230 is in elastic supporting member for supporting optical member
It is inserted under 220 thrust in groove 120；When needing to discharge locking, pitch variable bearings 20 can be driven by pitch motor
Outer ring 21 counterclockwise rotate so that sticking department 230 is exited from 122 side of the second concave portion of groove 120, be resisted against curved portion
On 110 smooth surface, and vane propeller-changing can be carried out, in pitch process, sticking department 230 is smooth along curved portion 110
Surface sliding.
Optionally, the skin-friction coefficient of the first concave portion 121 may be configured as the mantle friction greater than the second concave portion 122
Coefficient so that the timing of thrust one in elastic supporting member for supporting optical member 220 to sticking department 230, the first concave portion 121 and sticking department 230 it
Between frictional resistance be greater than frictional resistance between the second concave portion 122 and sticking department 230.
Optionally, limiting lock 200 is recessed with the first concave portion 121 and second when limiting lock 200 is located in groove 120
The two sides of end that portion 122 contacts can have different skin-friction coefficients, by taking Fig. 5 as an example, limiting lock 200 in limiting lock
200 big surface friction coefficients on surfaces contacted when being located in groove 120 with the first concave portion 121 in the second concave portion 122
The skin-friction coefficient on the surface of contact, so that frictional resistance between the first concave portion 121 and sticking department 230 can be greater than the
Frictional resistance between two concave portions 122 and sticking department 230.
In addition, although describing the case where groove 120 is arranged at the first end of locating part 100 above with reference to Fig. 5, so
And the setting position of groove 120 and quantity are without being limited thereto, for example, groove may also be arranged at the second end of locating part 100, separately
Outside, it can also be respectively provided with groove in the first end and second end in the circumferential direction of pitch variable bearings of locating part 100, at first end
Groove 120 is similar, and the groove at second end, which is arranged in, may also comprise first concave portion and different to the resistance of limiting lock 200
Two concave portions, wherein the concave portion close to second end can be greater than the concave portion far from second end to limit to the resistance of limiting lock 200
The resistance of position lock 200, specific implementation can be similar with above in reference to the description of groove 120 at first end, that is, concave portion
Radius of curvature can different, concave portion skin-friction coefficients can different, limiting lock 200 the surfaces contacted with different concave portions
Skin-friction coefficient can difference etc..
The blade locking arrangement of wind power generating set according to the present invention is described in detail anti-below with reference to Fig. 6 and Fig. 7
Wind load braking and locking and stress condition when exiting locking.
Referring to Fig. 6, the braking moment of pitch motor is FmbR, wherein Fmb is that the electromagnetic system power of pitch motor transmits
To the brake force of the outer ring of pitch variable bearings 20 21, R is the radius of the excircle of outer ring 21, the frictional force that blade locking arrangement provides
Square is FfL, wherein frictional resistance of the Ff between sticking department 230 and groove 120, L are the arm of force of frictional resistance Ff (that is, rubbing
Wipe the vertical range between resistance and the center of circle of pitch variable bearings).
When typhoon will be met with by predicting wind power generating set, locating part 100 is rotated by pitch motor, so that
Limiting lock 200 slides into the position of groove 120, and to be locked, blade is in state of putting away the oars at this time.It is locked to pitch-controlled system
Afterwards, pitch motor locking provides braking moment.When typhoon drives pitch-controlled system to rotate, the table of limiting lock 200 and groove 120
Face contact, the frictional force between limiting lock 200 and the surface of groove 120 provide moment of friction.Therefore, wind load is subjected at blade root
When torque Mz, the sum of braking moment and the moment of friction of blade locking arrangement of pitch motor need to be greater than wind load torque Mz, with lock
Fixed blade.
In this way, the frictional force that blade locking arrangement provides can resist jointly environment wind load with the brake force of pitch motor, with
Ensure that blade is in the lock state.
In the locked state, when wind load drives pitch-controlled system along first direction (for example, clockwise direction of Fig. 1 and Fig. 5)
When rotation, sticking department 230 is contacted with the first concave portion 121, and moment of friction between the two is W4, at this point, the system of pitch motor
Kinetic moment W2W should be met2>Mz-W4, to lock blade.
When wind load drive pitch-controlled system in a second direction (for example, counter clockwise direction of Fig. 5) rotate when, sticking department 230 with
The contact of second concave portion 122, moment of friction between the two are W5, at this point, the braking moment W of pitch motor2' W should be met2′>
Mz-W5, to lock blade.
In another embodiment in accordance with the invention, the radius of curvature of the first concave portion 121 is less than the second concave portion 122
Radius of curvature or the big surface friction coefficient of the first concave portion 121 work as elasticity in the skin-friction coefficient of the second concave portion 122
Thrust one timing of the supporting element 220 to sticking department 230, the frictional resistance Ff between sticking department 230 and groove 120 can be according to recessed
The increase of the skin-friction coefficient of the reduction and concave portion of the radius of curvature in portion and increase, therefore, the first concave portion 121 provide
Moment of friction W4The moment of friction W that the second concave portion 122 provides can be greater than5.Therefore, in this case, pitch motor with
The friction moment W of first concave portion 1214Braking moment W when common resistance wind load torque2' be smaller than pitch motor with second
The friction moment W of concave portion 1225Braking moment W when common resistance wind load torque2。
In this way, sticking department 230 is contacted with the first concave portion 121 or the second concave portion 122 according to the difference of wind direction, thus
Different moment of frictions is provided, therefore, pitch motor can provide different brake force according to the difference of wind direction, and due to first
Concave portion 121 can provide biggish moment of friction, therefore, resists wind load jointly in the moment of friction with the first concave portion 121 and turns round
When square, the brake force of pitch motor can be relatively small.
When typhoon disappears, under pitch motor driving, 100 rotary motion of locating part, elastic supporting member for supporting optical member 220 is compressed, lock
To determine portion 230 to be moved upwards by the surface extruding of groove 120, locating part 100 is exited in the preparation of limiting section 230, at this point, as shown in fig. 7,
The driving torque (Fmb ' R) of pitch motor can be made to be greater than the moment of friction (FfL) between sticking department 230 and groove 120, made
Groove 120 can smoothly be exited by obtaining limiting lock 200.
Preferably, when groove 120 includes the first concave portion 121 and the second concave portion 122, groove 120 is settable
In the end of locating part 100, sticking department 230 can be from the concave portion with relatively small radius of curvature or coefficient of friction of groove 120
Side is inserted into and is exited.
The control method of the pitch motor in the wind power generating set for including above-mentioned blade locking arrangement is described below.
When predict the bad weathers such as typhoon it is coming when, pitch motor can be driven, make in outer ring 21 and inner ring 22 with
One of blade connection rotation, so that limiting lock 200 is inserted into groove 120.
Pitch motor is set to provide brake force, to lock blade.Here, pitch motor can provide braking according to environment wind load
Power, to lock blade together with the locking torque of blade locking arrangement.Specifically, pitch motor is made to provide brake force to lock
During fixed blade, the sum of moment of friction between the braking moment of pitch motor and limiting lock 200 and groove 120 can be made big
In the torque of environment wind load, to resist ambient wind by the moment of friction of the braking moment of pitch motor and blade locking arrangement
It carries, blade is made to keep lock state.
Predetermined wind load can be set, when environment wind load is less than predetermined wind load, the locking of blade can be released, therefore, can be driven
Pitch motor makes one of to connect rotation with blade in outer ring 21 and inner ring 22, so that limiting lock 200 is moved back from groove 120
Out, pitch-controlled system can work normally.
During driving pitch motor to rotate one of connect with blade in outer ring 21 and inner ring 22, it can make to become
The sum of the driving moment of paddle motor and the torque of environment wind load are greater than the moment of friction between limiting lock 200 and groove 120, so that
Limiting lock 200 is exited from groove 120, to discharge the locking of blade.Here, after the bad weather of typhoon etc. disappears, ring
The torque of border wind load is less than predetermined wind load torque, and under windless condition, the torque of environment wind load is 0.
According to another embodiment of the present invention, a kind of wind power generating set is provided, which includes above-mentioned leaf
Piece locking device.
The blade locking arrangement of wind power generating set according to the present invention, it can be ensured that sent out in the bad working environments apparatus for lower wind such as typhoon
The safety of motor group, adaptability of the enhancing wind power generating set to environment.
In addition, the blade locking arrangement of wind power generating set according to the present invention, may include with different curvature radius
Or the groove of the concave portion of coefficient of friction, so as to further save the electromagnetic system of pitch motor by the blade locking arrangement
Power, and it is easy to discharge locking, in addition, the boundary of vane propeller-changing range is arranged in such groove structure, avoid blade
Influence of the locking device to the normal variable pitch of blade.
The variable pitch electricity of wind power generating set and wind power generating set according to the present invention with above-mentioned blade locking arrangement
The control method of machine, it is identical as the beneficial effect of above-mentioned blade locking arrangement, therefore which is not described herein again.
Although exemplary embodiment of the present invention is described in detail above, those skilled in the art are not departing from this
In the spirit and scope of invention, various modification and variation can be made to the embodiment of the present invention.It is understood that in ability
Apparently, these modification and variation will fall into the essence of exemplary embodiment of the present invention defined by claim to field technique personnel
In mind and range.
Claims (14)
1. a kind of blade locking arrangement of wind power generating set, which is characterized in that the blade locking arrangement includes:
Locating part (100), the locating part (100) are fixed on the outer ring (21) of the pitch variable bearings (20) of the wind power generating set
With on one of being connect with blade in inner ring (22)；
Limiting lock (200), the limiting lock (200) are fixed on the wheel hub (30) of the wind power generating set,
Wherein, the limiting lock (200) can be by the locating part (100) in the outer ring (21) and the inner ring (22)
The one rotation and moved between the first position for locking the blade and the second position of the release blade.
2. the blade locking arrangement of wind power generating set according to claim 1, which is characterized in that the locating part
It (100) include groove (120), when the limiting lock (200) are located in the groove (120), the blade is locked.
3. the blade locking arrangement of wind power generating set according to claim 2, which is characterized in that the groove (120)
Including the first concave portion (121) and the second concave portion (122), resistance of first concave portion (121) to the limiting lock (200)
Power and second concave portion (122) are different to the resistance of the limiting lock (200).
4. the blade locking arrangement of wind power generating set according to claim 3, which is characterized in that first concave portion
(121) radius of curvature is less than the radius of curvature of second concave portion (122).
5. the blade locking arrangement of wind power generating set according to claim 3, which is characterized in that first concave portion
(121) big surface friction coefficient is in the skin-friction coefficient of second concave portion (122).
6. the blade locking arrangement of wind power generating set according to claim 3, which is characterized in that the limiting lock
(200) big surface friction coefficient on the surface contacted with first concave portion (121) in second concave portion (122)
The skin-friction coefficient on the surface of contact.
7. the blade locking arrangement of the wind power generating set according to any one of claim 3-6, which is characterized in that described
The first end and/or second in the circumferential direction of the pitch variable bearings (20) in the locating part (100) is arranged in groove (120)
End.
8. the blade locking arrangement of wind power generating set according to claim 2, which is characterized in that the locating part
It (100) include curved portion (110) along the circumferentially extending of the pitch variable bearings (20), the groove (120) is formed in described
In curved portion (110).
9. the blade locking arrangement of wind power generating set according to claim 1, which is characterized in that the limiting lock
It (200) include fixed part (210), elastic supporting member for supporting optical member (220) and sticking department (230), the fixed part (210) is fixed on the wheel
On hub (4), one end of the elastic supporting member for supporting optical member (220) is fixed on the fixed part (210), and the other end is connected to the locking
Portion (230).
10. the blade locking arrangement of wind power generating set according to claim 9, which is characterized in that the fixed part
It (210) include guide portion (211), the guide portion (211) guides the sticking department (230) in the first position and described the
It is moved between two positions.
11. a kind of wind power generating set, which is characterized in that the wind power generating set includes such as any one of claim 1-10
The blade locking arrangement.
12. a kind of control method of the pitch motor of wind power generating set, which is characterized in that the wind power generating set includes such as
Blade locking arrangement of any of claims 1-10, the control method include:
The pitch motor is driven, rotates the one in the outer ring (21) and the inner ring (22), so that the limit
Position lock (200) is inserted into the groove (120)；
The pitch motor is set to provide brake force, to lock the blade；
When environment wind load is less than predetermined wind load, the pitch motor is driven, is made in the outer ring (21) and the inner ring (22)
The one rotation so that the limiting lock (200) is exited from the groove (120).
13. control method according to claim 12, which is characterized in that so that the pitch motor is provided brake force, with lock
The step of blade includes: calmly
Make the pitch motor to the braking moment of the periphery of the one in the outer ring (21) and the inner ring (22) with
The sum of moment of friction between the limiting lock (200) and the groove (120) is greater than the torque of environment wind load.
14. control method according to claim 12, which is characterized in that drive the pitch motor, make the outer ring
(21) and in the inner ring (22) the one rotation the step of include:
Make the pitch motor to the driving moment of the periphery of the one in the outer ring (21) and the inner ring (22) with
The sum of torque of the environment wind load is greater than the moment of friction between the limiting lock (200) and the groove (120).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811632563.7A CN109441736B (en) | 2018-12-29 | 2018-12-29 | Blade locking device, wind generating set and control method of variable pitch motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811632563.7A CN109441736B (en) | 2018-12-29 | 2018-12-29 | Blade locking device, wind generating set and control method of variable pitch motor |
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| CN109441736A true CN109441736A (en) | 2019-03-08 |
| CN109441736B CN109441736B (en) | 2024-05-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811632563.7A Active CN109441736B (en) | 2018-12-29 | 2018-12-29 | Blade locking device, wind generating set and control method of variable pitch motor |
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| CN110566419A (en) * | 2019-09-26 | 2019-12-13 | 北京金风科创风电设备有限公司 | Blade locking device, hub, impeller and wind generating set |
| CN113494417A (en) * | 2020-03-19 | 2021-10-12 | 乌鲁木齐金风天翼风电有限公司 | Variable pitch driving device for wind generating set and wind generating set |
| CN114087125A (en) * | 2020-08-24 | 2022-02-25 | 保定市昊昌电力科技有限公司 | Locking device for electric moving blade of wind driven generator |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN109441736B (en) | 2024-05-17 |
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