CN108223265A - Pitch drive apparatus and method - Google Patents
Pitch drive apparatus and method Download PDFInfo
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- CN108223265A CN108223265A CN201611144051.7A CN201611144051A CN108223265A CN 108223265 A CN108223265 A CN 108223265A CN 201611144051 A CN201611144051 A CN 201611144051A CN 108223265 A CN108223265 A CN 108223265A
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 230000005540 biological transmission Effects 0.000 claims abstract description 183
- 238000006243 chemical reaction Methods 0.000 claims abstract description 10
- 238000005452 bending Methods 0.000 claims description 12
- 230000001174 ascending effect Effects 0.000 claims description 11
- 238000010248 power generation Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 10
- 230000005611 electricity Effects 0.000 description 5
- 230000009931 harmful effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
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- 239000003245 coal Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
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- 239000003345 natural gas Substances 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
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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
- F05B2270/30—Control parameters, e.g. input parameters
- F05B2270/328—Blade pitch angle
-
- 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
- F05B2270/60—Control system actuates through
- F05B2270/602—Control system actuates through electrical actuators
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- 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 discloses variable pitch transmission equipment and a variable pitch transmission method, which relate to the field of wind power generation and comprise a motor, a power torque conversion device, a plurality of transmission shafts and a plurality of transmission devices; the power torque conversion device is configured to convert power output by the motor into output torque distributed to the plurality of rotating shafts so that the output torque is equal or a difference between the output torques is within an allowable range, and then drive the plurality of transmission devices through the plurality of transmission shafts so as to rotate the pitch bearing. The variable pitch transmission equipment and the variable pitch transmission method aim to solve the problem that the strength of the transmission device is not enough to support the transmission device in a limit load and fatigue load state for a long time.
Description
Technical field
The present invention relates to wind power generation field more particularly to a kind of pitch drive device and method.
Background technology
The energy is social economy and the main matter basis of human lives, is the power of social development.However, as the world
The reserves of the non-renewable energy such as oil, coal, the natural gas of energy mainstay are reduced increasingly, and world's every country all exists
Develop wind-power electricity generation, wind-power electricity generation has formd ripe scale as new energy.
Wind power generating set is the equipment for converting wind energy into electric energy.During wind-power electricity generation, wind drives wind-power electricity generation
The blade rotation of unit, so as to which wind-driven generator be driven in wind power generating set to rotate and produced electricl energy.Wind speed is bigger, wind-force hair
The rotating speed of motor is faster.In order to ensure the stabilization of speed of wind-driven generator, need to adjust the propeller pitch angle of blade according to wind speed, i.e., into
Row variable pitch.
In at this stage, power is exported using single motor pitch variable bearings to be driven to rotate, realizes variable pitch function.Specifically,
The output shaft of single motor is connected with retarder, and retarder and pitch variable bearings are connect respectively with drive, so that
The power of single motor output is transmitted to by retarder on transmission device, then pitch variable bearings is driven to rotate by transmission device,
So as to fulfill variable pitch function.But with the promotion of the heating power of wind power generating set and the length of blade and weight not
It is disconnected to increase, drive the required load increase of pitch variable bearings, the burden of transmission device.The intensity of transmission device is not enough to prop up
Support transmission device is chronically at ultimate load and fatigue load state so that transmission device is easily damaged, so as to cause wind
Power generator group breaks down.
Invention content
An embodiment of the present invention provides a kind of pitch drive device and method, and the intensity of transmission device can be avoided to be not enough to
Support transmission device is chronically at the situation of ultimate load and fatigue load state.
In a first aspect, the embodiment of the present invention provides a kind of pitch drive equipment, for pitch variable bearings to be driven to rotate, including electricity
Machine, power torque changing apparatus, more transmission shafts and multiple transmission devices；Power torque changing apparatus is configured as the power for exporting motor
It is converted into the output torque for distributing to more rotation axis so that output torque is equal or the difference of output torque is in allowed band
It is interior, multiple transmission devices then are driven by more transmission shafts, so as to rotate pitch variable bearings.
According in a first aspect, power torque changing apparatus includes power distribution unit and multiple torque-converters, power distribution unit quilt
It is configured to the power that motor exports distributing to multiple torque-converters；Multiple torque-converters carry out bending moment according to the power of distribution, and will
The output torque that bending moment obtains is transferred to more transmission shafts.
According in a first aspect, each torque-converters is additionally configured to the power distributed according to power distribution unit and the mesh set
The ratio of torque is marked, adjustment torque-converters is transferred to the output torque of corresponding transmission shaft.
According in a first aspect, above-mentioned pitch drive equipment further includes driver and variable pitch speed acquisition device, variable pitch speed
Harvester is configured as the practical variable pitch speed of acquisition pitch variable bearings, and the practical variable pitch speed of acquisition is passed to driving
Device, driver is according to practical variable pitch speed and the difference of the target variable pitch speed of setting, the power of adjustment motor output.
According in a first aspect, above-mentioned pitch drive equipment further includes absolute value encoder, absolute value encoder is configured as
The output torque and rotating speed of more rotation axis are fed back to driver so that the output torque of more transmission shafts of drive monitors and turn
Speed.
According in a first aspect, above-mentioned pitch drive equipment further include be arranged between every transmission shaft and transmission device from
Clutch, clutch are configured as control transmission shaft and connect or be detached from corresponding drive.
According in a first aspect, transmission device is toothed belt or gear.
According in a first aspect, power distribution unit by multiple transmission shafts it is corresponding with multiple torque-converters be sequentially connected, wherein,
Power distribution unit includes differential mechanism or multiple axial decelerator.
Second aspect, the embodiment of the present invention additionally provide a kind of pitch drive method, are passed for the variable pitch in said program
Dynamic equipment, including：Give the power transmission that motor exports to power torque changing apparatus；The power for being exported motor by power torque changing apparatus
It is converted into the output torque for distributing to more transmission shafts, the output torque of more transmission shafts is equal or the difference of output torque is permitting
Perhaps in the range of；Under the drive of more transmission shafts, pitch variable bearings rotation is driven by multiple transmission devices.
By the power-conversion that motor exports it is distribute to more transmission shafts defeated by power torque changing apparatus according to second aspect
The step of going out torque includes：The power that motor exports is distributed into multiple torque-converters by power distribution unit；By multiple torque-converters
Bending moment is carried out according to the power of distribution so that the output torque of multiple torque-converters is equal or the difference of output torque is in allowed band
It is interior；The output torque of multiple torque-converters is transferred to more transmission shafts.
According to second aspect, above-mentioned pitch drive method further includes：By variable pitch speed acquisition device acquisition pitch variable bearings
Practical variable pitch speed；By driver according to practical variable pitch speed and the difference of the target variable pitch speed of setting, adjustment motor output
Power.
According to second aspect, above-mentioned pitch drive method further includes：It is moved by torque-converters according to what power distribution unit was distributed
The ratio of power and the target torque of setting, adjustment torque-converters are transferred to the output torque of transmission shaft.
According to second aspect, above-mentioned pitch drive method further includes：The output torque of more transmission shafts of drive monitors and
Rotating speed；If slippage of the output torque of at least one transmission shaft in more transmission shafts within the unit interval is more than preset torsion
Square falling-threshold value, and ascending amount of the rotating speed of at least one transmission shaft within the unit interval is more than preset rotating speed ascending threshold,
Then driver is stopped or is detached from by the driver control corresponding clutch of an at least transmission shaft and transmission device；It is if more
Ascending amount of the output torque of at least one transmission shaft in root transmission shaft within the unit interval is more than preset torque and rises threshold
It is worth, and slippage of the rotating speed of at least one transmission shaft within the unit interval is more than preset rotating speed falling-threshold value, then driver
It is stopped or is detached from by the driver control corresponding clutch of an at least transmission shaft and transmission device.
An embodiment of the present invention provides a kind of pitch drive device and method, will by power torque changing apparatus by single motor
The power-conversion of output distributes to multiple transmission shafts for output torque, and multiple transmission shafts drive multiple transmission devices, multiple transmissions
Device drives pitch variable bearings to rotate jointly, realizes variable pitch function.Pitch variable bearings torque required when carrying out variable pitch can be given
Multiple transmission devices drive corresponding transmission device respectively by multiple transmission shafts, are provided for pitch variable bearings required when carrying out variable pitch
Torque, so as to reduce the burden of each transmission device, transmission device is avoided to be chronically at ultimate load and fatigue load state,
The feelings that transmission device is supported to be chronically at ultimate load and fatigue load state are not enough to so as to avoid the intensity of transmission device
Condition.
Description of the drawings
From below in conjunction with the accompanying drawings to the present invention specific embodiment description in may be better understood the present invention wherein,
The same or similar reference numeral represents the same or similar feature.
Fig. 1 is the structure diagram of the pitch drive equipment in one embodiment of the invention；
Fig. 2 is the flow chart of the pitch drive method in one embodiment of the invention；
Fig. 3 is the structure diagram of the pitch drive equipment in another embodiment of the present invention；
Fig. 4 is the structure diagram of the pitch drive equipment in further embodiment of this invention；
Fig. 5 is the driving schematic diagram of the pitch drive equipment in further embodiment of this invention；
Fig. 6 is the structure diagram of the pitch drive equipment in yet another embodiment of the invention；
Fig. 7 is the flow chart of the pitch drive method in yet another embodiment of the invention.
Wherein：11- motors；12- power torque changing apparatus；13- transmission shafts；14- transmission devices；15- pitch variable bearings；16- drives
Dynamic device；17- variable pitch speed acquisition devices；18- clutches；121- power distribution units；122- torque-converters.
Specific embodiment
The feature and exemplary embodiment of various aspects of the invention is described more fully below.In following detailed description
In, it is proposed that many details, in order to provide complete understanding of the present invention.But to those skilled in the art
It will be apparent that the present invention can be implemented in the case of some details in not needing to these details.Below to implementing
The description of example is used for the purpose of by showing that the example of the present invention is better understood from the present invention to provide.The present invention never limits
In any concrete configuration set forth below and algorithm, but cover under the premise of without departing from the spirit of the present invention element,
Any modification, replacement and the improvement of component and algorithm.In the the accompanying drawings and the following description, well known structure and skill is not shown
Art is unnecessary fuzzy to avoid causing the present invention.
Fig. 1 is the structure diagram of the pitch drive equipment in one embodiment of the invention, as shown in Figure 1, pitch drive is set
It is standby to include motor 11, power torque changing apparatus 12, more transmission shafts 13 and multiple transmission devices 14, wherein motor 11 and power bending moment
Device 12 connects, and power torque changing apparatus 12 is connect with more transmission shafts 13, and more transmission shafts 13 are connect with multiple transmission devices 14.
It is the output torque of distributing to more rotation axis 13 that power torque changing apparatus 12, which is configured as the power-conversion that motor 11 exports, is made
Output torque is equal or the difference of output torque is in allowed band, then multiple transmissions is driven to fill by more transmission shafts 13
14 are put, so as to rotate pitch variable bearings 15.The output torque of more rotation axis 13 is equal or the difference of output torque is allowing model
In enclosing, it can ensure that the output torque being transferred on each transmission device 14 keeps relative equilibrium, so as to ensure multiple transmission dresses
15 normal rotation of pitch variable bearings can be driven jointly by putting 14.
In a possible example, transmission device 14 can be the transmission parts such as toothed belt or gear or transmission parts
Combination.Each motor 11 can be sequentially connected by transmission shaft 13, toothed belt or gear etc. and the outer ring of pitch variable bearings 15, so as to
Pitch variable bearings 15 is driven to rotate.If transmission device 14 is toothed belt, multiple toothed belts can be in the axial direction side of pitch variable bearings 15
Upward laid out in parallel.
In order to avoid transmission device 14 is chronically at ultimate load and fatigue load state, especially for high-power (ratio
Such as more than 3MW) wind power generating set, can by powerful wind power generating set carry out variable pitch needed for large torque give
Multiple transmission devices 14, so as to avoid transmission device 14 because intensity deficiency is chronically at ultimate load and fatigue load state
Situation.
Fig. 2 is the flow chart of the pitch drive method in one embodiment of the invention, as shown in figure 3, the pitch drive method
Including step 201- steps 205.
In step 201, by the power transmission that motor 11 exports to power torque changing apparatus 12.
In step 202, the power-conversion exported motor 11 by power torque changing apparatus 12 is distributes to more transmission shafts
13 output torque.
Wherein, the output torque of more transmission shafts 13 is equal or the difference of output torque is in allowed band.
In step 203, under the drive of more transmission shafts 13,15 turns of pitch variable bearings are driven by multiple transmission devices 14
It is dynamic.
It should be noted that when the output torque of more transmission shafts 13 is equal or the difference of output torque is in allowed band,
The output torque of more transmission shafts 13 enables to transmission device 14 normally pitch variable bearings 15 to be driven to carry out variable pitch.Due to power
Torque changing apparatus 12, may be because of certain factors during output torque is distributed so that the output of more transmission shafts 13 is turned round
Square has fine distinction, but pitch variable bearings 15 can normally be driven to carry out variable pitch, and such case is also in the embodiment of the present invention
In protection domain.
An embodiment of the present invention provides a kind of pitch drive device and method, pass through power torque changing apparatus by single motor 11
The power-conversion of output is distributed to multiple transmission shafts 13 by 12 for output torque, and multiple transmission shafts 13 drive multiple transmission devices
14, multiple transmission devices 14 drive pitch variable bearings 15 to rotate jointly, realize variable pitch function.Pitch variable bearings 15 carry out required during variable pitch
Torque can give multiple transmission devices 14, drive corresponding transmission device 14 respectively by multiple transmission shafts 13, be variable pitch
Bearing 15 provides torque required when carrying out variable pitch, so as to reduce the burden of each transmission device 14.
Fig. 3 is the structure diagram of the pitch drive equipment in another embodiment of the present invention, as shown in figure 3, the present invention is real
The power torque changing apparatus 12 applied in the pitch drive equipment in example includes power distribution unit 121 and multiple torque-converters 122, power
Allocation unit 121 is configured as the power that motor 11 exports distributing to multiple torque-converters 122；Multiple torque-converters 122 according to point
The power matched carries out bending moment, and the output torque that bending moment obtains is transferred to more transmission shafts 13, so as to utilize 13 band of transmission shaft
Corresponding transmission device 14 is moved, so as to drive pitch variable bearings 15.The torque that pitch variable bearings 15 carry out needed for variable pitch can be assigned to
On each 122 corresponding transmission shaft 13 of torque-converters, the torque that needs that each torque-converters 13 is shared export is smaller, therefore
The burden of transmission device 14 that 122 corresponding transmission shaft 13 of each torque-converters drives is also smaller.
It should be noted that when the difference of the output torque of the transmission shaft 13 of multiple torque-converters 122 is in allowed band, it is multiple
The output torque that torque-converters 122 is transferred to transmission shaft 13 enables to transmission device 14 normally pitch variable bearings 15 to be driven to carry out variable pitch
's.It, may be because of certain factors since torque-converters 122 is during bending moment is carried out so that multiple torque-converters 122 are transferred to
The output torque of transmission shaft 13 has fine distinction, but pitch variable bearings 15 can normally be driven to carry out variable pitch, such case
In the protection domain of the embodiment of the present invention.
Power distribution unit 121 can be differential mechanism or multiple axial decelerator etc., and power distribution unit 121 can pass through more
Transmission shaft is corresponding with multiple torque-converters 122 to be sequentially connected.It should be noted that power distribution unit 121 can be defeated by motor 11
The power gone out is averagely allocated to multiple torque-converters 122, can also the power inequality that motor 11 exports be distributed to multiple bending moments
Device 122, but to ensure that each torque-converters 122 can be assigned to certain power.Multiple torque-converters 122 are according to the power of distribution
Carry out bending moment so that the output torque of multiple 122 corresponding transmission shafts 13 of torque-converters is equal or the difference of output torque is allowing
In the range of.Specifically, torque-converters 122 can be fluid torque-converter.Multiple transmission devices 15 are configured as in multiple torque-converters 13
Under the drive of corresponding transmission shaft 14, pitch variable bearings 16 is driven to rotate.
Fig. 4 is the structure diagram of the pitch drive equipment in further embodiment of this invention, and pitch drive shown in Fig. 4 is set
It is standby that the difference lies in as shown in figure 4, pitch drive equipment further includes driver 16 with pitch drive equipment shown in FIG. 1
With the variable pitch speed acquisition device 17 being arranged on pitch variable bearings 15.Driver 16 is configured as driving motor 11.Specifically, become
Paddle speed acquisition device 17 can be the devices such as encoder.
Fig. 5 is the driving schematic diagram of the pitch drive equipment in further embodiment of this invention, as shown in figure 5, variable pitch speed
Harvester 17 is configured as the practical variable pitch speed of acquisition pitch variable bearings 15, and the practical variable pitch speed of acquisition is passed to driving
Device 16.Driver 16 is configured as the difference of the target variable pitch speed according to practical variable pitch speed and setting, and adjustment motor 11 is defeated
The power gone out.Each torque-converters 122 is additionally configured to the power distributed according to power distribution unit 121 and the target torque set
Ratio, adjustment torque-converters 122 is transferred to the output torque of transmission shaft 13.Driver 16 in the embodiment of the present invention is integrated with control
Unit processed, storage unit and Transmit-Receive Unit, can realize the function of receiving and sending messages, control and store.
In embodiments of the present invention, the reality fed back to according to the variable pitch speed acquisition device 17 set on pitch variable bearings 15
Variable pitch speed and the target variable pitch speed of setting, can form variable pitch speed control closed loop.It is right for each torque-converters 122
For the transmission shaft 13 answered, the power and the ratio of the target torque of setting that are distributed according to power distribution unit 121 can be formed
Moment of torsion control open loop.So that the output torque balance and stabilization of multiple 122 corresponding transmission shafts 13 of torque-converters.
Fig. 6 is the structure diagram of the pitch drive equipment in yet another embodiment of the invention, and pitch drive shown in fig. 6 is set
It is standby that the difference lies in be arranged on often as shown in fig. 6, pitch drive equipment further includes with pitch drive equipment shown in Fig. 4
Clutch 18 between root transmission shaft 13 and transmission device 14, clutch 18 are configured as control transmission shaft 13 and corresponding transmission
Device 14 is sequentially connected or is detached from.Specifically, clutch 18 can be friction plate clutch, magnetic particle coupling, eddy current type
Clutch and the jaw clutch that can be acted with load.It, can be with when some torque-converters 122 or transmission shaft 13 break down
Using corresponding clutch 18, transmission shaft 13 and transmission device 14 are separated to come, so as to ensure the torque-converters 122 to break down
Or transmission shaft 13 will not carry out variable pitch to pitch variable bearings 15 and cause harmful effect.
In one example, absolute value encoder can be set on transmission shaft 13, absolute value encoder be configured as to
Driver feeds back the output torque and rotating speed of more rotation axis 13, so that driver 16 can monitor more transmission shafts 13
Output torque and rotating speed.
Fig. 7 be yet another embodiment of the invention in pitch drive method flow chart, pitch drive equipment shown in Fig. 7 with
The difference lies in as shown in fig. 7, the method for pitch drive further includes step 204- steps to pitch drive equipment shown in Fig. 2
Rapid 206.
In step 204, the output torque and rotating speed of transmission shaft 13 are monitored by driver 16.
In step 205, if the output torque of at least one transmission shaft 13 in more transmission shafts 13 is within the unit interval
Slippage be more than preset torque falling-threshold value, and the rotating speed of at least one transmission shaft 13 in more transmission shafts 13 is in unit
Ascending amount in time is more than preset rotating speed ascending threshold, then driver 10 is stopped or controls this extremely by driver 10
A few 13 corresponding clutch 18 of transmission shaft is detached from transmission device 14.
For example, when indivedual torque-converters 122 or transmission shaft 13 fail, the output for the transmission shaft 13 that driver 16 monitors is turned round
Square will appear it is larger fall and rotating speed can rise suddenly, in order to ensure the normal work of wind power generating set, it is necessary to driver
16 are stopped or the 13 corresponding clutch 18 of transmission shaft are controlled to be detached from transmission device 14 by driver 16.
In step 206, if the output torque of at least one transmission shaft 13 in more transmission shafts 13 is within the unit interval
Ascending amount be more than preset torque ascending threshold, and the rotating speed of at least one transmission shaft 13 in more transmission shafts 13 is in unit
Slippage in time is more than preset rotating speed falling-threshold value, then driver 10 is stopped or controls this extremely by driver 10
A few 13 corresponding clutch 18 of transmission shaft is detached from transmission device 15.
For example, when there are indivedual torque-converters 122 or clamping stagnation occurs in transmission shaft 13, transmission shaft 13 that driver 10 monitors
Output torque can steeply rise and rotating speed can decline suddenly, in order to ensure the normal work of wind power generating set, it is necessary to drive
Dynamic device 10 is stopped or controls the 13 corresponding clutch 18 of transmission shaft to be detached from transmission device 14.
In embodiments of the present invention, when torque-converters 122 or transmission shaft 13 break down or fail, the transmission can be controlled
13 corresponding clutch 18 of axis makes transmission shaft 13 be detached from transmission device 15, so as to stop road transmission, avoids the occurrence of failure
Torque-converters 13 or the transmission shaft 13 to break down carry out variable pitch to pitch variable bearings 15 and cause harmful effect.
It should be noted that encoder, limit switch or close switch etc. can also be set around pitch variable bearings 15,
Encoder, limit switch can be utilized or the blade position of wind power generating set is monitored and verified close to switch etc..It can
To install limit switch or close to switch in blade alert locations, when blade turned position reaches blade alert locations so that
Limit switch and close to switch conduction, so as to learn that blade reaches blade alert locations, needs to send out instruction alarm, alarm
Or early warning.
Structures described above frame functional block shown in figure (such as driver) can be implemented as hardware, software, firmware
Or combination thereof.When realizing in hardware, it may, for example, be electronic circuit, application-specific integrated circuit (ASIC), fit
When firmware, plug-in unit, function card etc..When being realized with software mode, element of the invention is used to perform required task
Program or code segment.Either code segment can be stored in machine readable media or by being carried in carrier wave program
Data-signal is sent in transmission medium or communication links." machine readable media " can include being capable of storage or transmission information
Any medium.In addition, described feature, structure or characteristic can be incorporated in one or more realities in any suitable manner
It applies in example.In the following description, many details are provided to fully understand the embodiment of the present invention so as to provide.So
And it will be appreciated by persons skilled in the art that technical scheme of the present invention can be put into practice without one in the specific detail
Or more or may be used other methods, constituent element, material etc..In other cases, it is not shown in detail or describes known tie
Structure, material or operation to avoid the fuzzy present invention major technique intention.
Claims (13)
1. a kind of pitch drive equipment, for pitch variable bearings (15) to be driven to rotate, it is characterised in that：
Including motor (11), power torque changing apparatus (12), more transmission shafts (13) and multiple transmission devices (14)；
The power torque changing apparatus (12) is configured as the power-conversion for exporting the motor (11) to distribute to described more
The output torque of rotation axis (13) so that output torque is equal or the difference of output torque is in allowed band, then passes through institute
It states more transmission shafts (13) and drives the multiple transmission device (14), so as to rotate the pitch variable bearings (15).
2. pitch drive equipment according to claim 1, which is characterized in that the power torque changing apparatus (12) is including power
Allocation unit (121) and multiple torque-converters (122), the power distribution unit (121) are configured as the motor (11) is defeated
The power gone out distributes to the multiple torque-converters (122)；The multiple torque-converters (122) carries out bending moment according to the power of distribution,
And the output torque that bending moment obtains is transferred to the more transmission shafts (13).
3. pitch drive equipment according to claim 2, which is characterized in that each torque-converters (122) is additionally configured to root
According to the ratio of the target torque of the power and setting of the power distribution unit (121) distribution, the torque-converters (122) biography is adjusted
It is defeated by the output torque of corresponding transmission shaft (13).
4. pitch drive equipment according to claim 2, which is characterized in that further include driver (16) and variable pitch speed is adopted
Acquisition means (17), the variable pitch speed acquisition device (17) are configured as acquiring the practical variable pitch speed of the pitch variable bearings (15)
Degree, and the practical variable pitch speed of acquisition is passed into the driver (16), the driver (16) is according to the reality
The difference of variable pitch speed and the target variable pitch speed of setting adjusts the power of the motor (11) output.
5. pitch drive equipment according to claim 4, which is characterized in that absolute value encoder is further included, it is described absolute
Value encoder is configured as feeding back the output torque and rotating speed of more transmission shafts (13) to the driver (16).
6. pitch drive equipment according to claim 2, which is characterized in that further include be arranged on every transmission shaft (13) with
Clutch (18) between the transmission device (14), the clutch (18) be configured as controlling the transmission shaft (13) with it is right
The transmission device (14) answered is sequentially connected or is detached from.
7. any one pitch drive equipment according to claim 1-6, which is characterized in that the transmission device (14) is tooth
Shape band or gear.
8. the pitch drive equipment any one of according to claim 2-6, which is characterized in that the power distribution unit
(121) it is sequentially connected by the way that multiple transmission shafts are corresponding with the multiple torque-converters (122), wherein, the power distribution unit
(121) including differential mechanism or multiple axial decelerator.
A kind of 9. pitch drive method, which is characterized in that set for the pitch drive described in any one in claim 1-9
It is standby, the method includes：
By the power transmission that motor (11) exports to power torque changing apparatus (12)；
The power-conversion for being exported the motor (11) by the power torque changing apparatus (12) is distributes to more transmission shafts (13)
Output torque, the output torque of the more transmission shafts (13) is equal or the difference of output torque is in allowed band；
Under the drive of the more transmission shafts (13), pitch variable bearings (15) is driven to rotate by multiple transmission devices (14).
10. pitch drive method according to claim 9, which is characterized in that by the power torque changing apparatus (12) by institute
The step of power-conversion for stating motor (11) output is the output torque for distributing to more transmission shafts (13) includes：
The power that motor (11) exports is distributed into multiple torque-converters (122) by power distribution unit (121)；
Bending moment is carried out according to the power of distribution by the multiple torque-converters (122) so that the output of the multiple torque-converters (122)
The difference of moment of torsion etc. or output torque is in allowed band；
The output torque of the multiple torque-converters (122) is transferred to the more transmission shafts (13).
11. pitch drive method according to claim 9, which is characterized in that further include：
The practical variable pitch speed of the pitch variable bearings (15) is acquired by variable pitch speed acquisition device (17)；
By the driver (16) according to the practical variable pitch speed and the difference of the target variable pitch speed of setting, motor is adjusted
(11) power of output.
12. pitch drive method according to claim 10, which is characterized in that further include：
By the torque-converters (122) according to the power that the power distribution unit (121) is distributed and the ratio of the target torque of setting
Value, adjusts the output torque that the torque-converters (122) is transferred to transmission shaft (13).
13. pitch drive method according to claim 11, which is characterized in that further include：
The output torque and rotating speed of the more transmission shafts (13) are monitored by the driver (16)；
If slippage of the output torque of at least one transmission shaft (13) in more transmission shafts (13) within the unit interval is more than
Preset torque falling-threshold value, and ascending amount of the rotating speed of at least one transmission shaft (13) within the unit interval is more than default
Rotating speed ascending threshold, then the driver (16) be stopped or by the driver (16) control described at least one pass
The corresponding clutch (18) of moving axis (13) is detached from transmission device (14)；
If ascending amount of the output torque of at least one transmission shaft (13) in the more transmission shafts (13) within the unit interval
More than preset torque ascending threshold, and slippage of the rotating speed of at least one transmission shaft (13) within the unit interval is more than
Preset rotating speed falling-threshold value, then the driver (16) be stopped or by the driver (16) control described at least one
The corresponding clutch (18) of root transmission shaft (13) is detached from transmission device (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611144051.7A CN108223265A (en) | 2016-12-12 | 2016-12-12 | Pitch drive apparatus and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611144051.7A CN108223265A (en) | 2016-12-12 | 2016-12-12 | Pitch drive apparatus and method |
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| Publication Number | Publication Date |
|---|---|
| CN108223265A true CN108223265A (en) | 2018-06-29 |
Family
ID=62637997
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611144051.7A Pending CN108223265A (en) | 2016-12-12 | 2016-12-12 | Pitch drive apparatus and method |
Country Status (1)
| Country | Link |
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| CN (1) | CN108223265A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109441724A (en) * | 2018-12-26 | 2019-03-08 | 北京金风科创风电设备有限公司 | Safety throttling device and method for hydraulic pitch control system and hydraulic pitch control system |
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| US20030116970A1 (en) * | 2001-08-20 | 2003-06-26 | Roland Weitkamp | Means for adjusting the rotor blade of a wind power plant rotor |
| CN201991694U (en) * | 2011-02-23 | 2011-09-28 | 北车风电有限公司 | Control system for blade speed regulating device of wind generating set |
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| CN109441724A (en) * | 2018-12-26 | 2019-03-08 | 北京金风科创风电设备有限公司 | Safety throttling device and method for hydraulic pitch control system and hydraulic pitch control system |
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Application publication date: 20180629 |