CN107781366A - Elasticity adjusting means and method, the pitch drive system of cog belt - Google Patents
Elasticity adjusting means and method, the pitch drive system of cog belt Download PDFInfo
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- CN107781366A CN107781366A CN201710876141.3A CN201710876141A CN107781366A CN 107781366 A CN107781366 A CN 107781366A CN 201710876141 A CN201710876141 A CN 201710876141A CN 107781366 A CN107781366 A CN 107781366A
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- oil pressure
- hydraulic jack
- controller
- adjusting means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
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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
- F03D17/00—Monitoring or testing of wind motors, e.g. diagnostics
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
- F16H2007/0802—Actuators for final output members
- F16H2007/0812—Fluid pressure
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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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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
Abstract
The present invention provides a kind of the elasticity adjusting means and method, pitch drive system of cog belt.The elasticity adjusting means of the wind power generating set cog belt includes：Hydraulic jack with piston rod, oil pressure detector, controller and oil pressure actuator.Wherein, stretching one end of hydraulic jack of piston rod and the axle center of tensioning wheel are fixed；Oil pressure detector is configured as detecting the actual oil pressure of hydraulic jack；Controller is configured as the size of standard of comparison oil pressure and actual oil pressure, and oil pressure cntrol order is generated according to comparative result；Oil pressure actuator is configured as according to oil pressure cntrol order, implements control operation to the oil pressure of hydraulic jack.Using elasticity adjusting means provided in an embodiment of the present invention, the tightness of cog belt can be adjusted in real time.
Description
Technical field
The present invention relates to the elasticity regulation of technical field of wind power generation, more particularly to a kind of wind power generating set cog belt
Apparatus and method, pitch drive system.
Background technology
Cog belt is the transmission belt that a kind of working face is tooth-shape structure.Cog belt with the engagement between tooth and the gear teeth by making
With entering action edge transmission.The cog belt kind of drive has stable drive, safeguards simple and lower-cost feature, is configured as wind
In the pitch-controlled system of power generator group.
Fig. 1 is the schematic diagram of the tooth form belt drive structure of wind power generating set of the prior art.Wind-force is shown in Fig. 1
Blade 101, wheel hub 102, pitch variable bearings (not shown), drive 103, tensioning wheel 104 and the cog belt 105 of generating set, its
In, pitch variable bearings are sheathed in wheel hub 102, and the root of blade 101 is fixed on pitch variable bearings, the both ends difference of cog belt 105
Be fixed in the side wall of the root of blade 101, drive 103 located at cog belt 105 towards the side of blade 101, and drive
103 are meshed with cog belt 105, tensioning wheel 104 be arranged at cog belt 105 backwards to blade 101 side, and tensioning wheel 104 with
Cog belt 105 leans.When carrying out change oar to wind generator set blade, drive 103 is driven by motor, drives cog belt
105 rotate, and cog belt 105 rotates with movable vane piece 101, reach and specify change propeller angle, in the rotation process of cog belt, tensioning wheel
104 are used to apply pressure to cog belt, cog belt 105 in pitch process is constantly in tensioning state.
The tensioning degree of elastic band can be adjusted before lifting is completed and finished in the prior art, and can not be adjusted in real time.
Because the tightness of cog belt in actual moving process may change, cause the accuracy of the blade anglec of rotation to reduce.
Therefore, the tightness of cog belt needs to be adjusted in real time.
The content of the invention
The embodiments of the invention provide a kind of elasticity adjusting means of wind power generating set cog belt and method, become oar biography
Dynamic system, can be adjusted in real time to the tightness of cog belt.
In a first aspect, the embodiments of the invention provide a kind of elasticity adjusting means of wind power generating set cog belt, tooth
Shape band is provided with tensioning wheel backwards to the side of wind generator set blade, and the tensioning wheel leans with cog belt, the elasticity
Adjusting means includes：Hydraulic jack with piston rod, oil pressure detector, controller and oil pressure actuator；Wherein, piston rod
One end of hydraulic jack and the axle center of tensioning wheel is stretched out to fix；Oil pressure detector is configured as detecting the actual oil of hydraulic jack
Pressure；Controller is configured as the size of standard of comparison oil pressure and actual oil pressure, and oil pressure cntrol order is generated according to comparative result；Its
In, when standard oil pressure is that cog belt is in predetermined elasticity, the oil pressure of hydraulic jack；Oil pressure actuator, it is configured as according to oil
Control command is pressed, control operation is implemented to the oil pressure of hydraulic jack.
In some embodiments of first aspect, controller is specifically configured to when actual oil pressure is less than standard oil pressure,
To start the presser unit in oil pressure actuator, control presser unit performs pressurized operation, makes hydraulic pressure for generation pressurized control order
The oil pressure of oil cylinder increases to standard oil pressure.
In some embodiments of first aspect, controller is specifically configured to when actual oil pressure is less than standard oil pressure,
Standard oil pressure is subtracted into actual oil pressure and obtains the first difference, by the first difference compared with default pressurization threshold value, if first is poor
Value, which is more than, presets pressurization threshold value, then generates pressurized control order to start the presser unit in oil pressure actuator, control pressurization list
Member performs pressurized operation, the oil pressure of hydraulic jack is increased to standard oil pressure.
In some embodiments of first aspect, presser unit includes hydraulic pump, and control terminal and the controller of hydraulic pump connect
Connect, the input of hydraulic pump connects with fuel tank, and the output end of hydraulic pump connects with hydraulic jack.
In some embodiments of first aspect, elasticity adjusting means also includes pressurization monitoring unit, and pressurization monitoring is single
Member, is configured as whether monitoring pressure unit completes compression motion, and monitoring result is sent to controller.
In some embodiments of first aspect, controller is specifically configured to when actual oil pressure is more than standard oil pressure,
To start the decompressing unit in oil pressure actuator, control decompressing unit performs decompression operation, makes hydraulic pressure for generation Decompression Controlling order
The oil pressure of oil cylinder is reduced to standard oil pressure.
In some embodiments of first aspect, controller is specifically configured to：When actual oil pressure is more than standard oil pressure,
Actual oil pressure is subtracted into standard oil pressure and obtains the second difference, by the second difference compared with default relief pressure threshold, if second is poor
Value is more than default relief pressure threshold, then generates Decompression Controlling order to start the decompressing unit in oil pressure actuator, controls decompression single
Member performs decompression operation, the oil pressure of hydraulic jack is reduced to standard oil pressure.
In some embodiments of first aspect, decompressing unit includes relief valve, and control terminal and the controller of relief valve connect
Connect, relief valve is arranged on the pipeline between hydraulic jack and fuel tank.
In some embodiments of first aspect, elasticity adjusting means also includes first position measurement and switched, first
Put measurement switch to be arranged on the elongation path of piston rod, first position measurement switch is configured as passing through first in piston rod
When putting at measurement switch position, sent to controller and represent the tensioning degree of cog belt as the feedback letter in alarm condition
Number.
In some embodiments of first aspect, elasticity adjusting means also includes second place measurement switch, second
Measurement switch is put to be arranged on the elongation path of piston rod, and the side of the close tensioning wheel positioned at first position measurement switch,
Second place measurement switch is configured as, when piston rod is measured at switch position by the second place, sending to controller
The tensioning degree of cog belt is represented as the feedback signal in limiting condition.
In some embodiments of first aspect, the one end of piston rod away from hydraulic jack is provided with rolling bearing, tensioning wheel
It is sheathed on rolling bearing.
Second aspect, the embodiment of the present invention provides a kind of elastic adjusting method of wind power generating set cog belt, for such as
The elasticity adjusting means of upper described wind power generating set cog belt, the elastic adjusting method include：Examined by oil pressure detector
Survey the actual oil pressure of hydraulic jack；By the size of controller standard of comparison oil pressure and actual oil pressure, oil is generated according to comparative result
Press control command；Wherein, when standard oil pressure is that cog belt is in predetermined elasticity, the oil pressure of hydraulic jack；By oil pressure actuator
According to the oil pressure cntrol order of controller, control operation is implemented to the oil pressure of hydraulic jack.
In some embodiments of second aspect, oil pressure cntrol order is generated according to comparative result, including：When actual oil pressure
During less than standard oil pressure, pressurized control order is generated by controller to start the presser unit in oil pressure actuator, control pressurization
Unit performs pressurized operation, the oil pressure of hydraulic jack is increased to standard oil pressure.
In some embodiments of second aspect, when actual oil pressure is less than standard oil pressure, pressurization control is generated by controller
System is ordered to start the presser unit in oil pressure actuator, including：When actual oil pressure is less than standard oil pressure, will be marked by controller
Quasi- oil pressure subtracts actual oil pressure and obtains the first difference, by the first difference compared with default pressurization threshold value, if the first difference is big
In default pressurization threshold value, then pressurized control order is generated to start the presser unit in oil pressure actuator.
In some embodiments of second aspect, oil pressure cntrol order is generated according to comparative result, in addition to：When actual oil
When pressure is more than standard oil pressure, Decompression Controlling order is generated to start the decompressing unit in oil pressure actuator by controller, control subtracts
Press unit to perform decompression operation, the oil pressure of hydraulic jack is reduced to standard oil pressure.
In some embodiments of second aspect, when actual oil pressure is more than standard oil pressure, decompression control is generated by controller
System is ordered to start the decompressing unit in oil pressure actuator, including：, will be real by controller when actual oil pressure is more than standard oil pressure
Border oil pressure subtracts standard oil pressure and obtains the second difference, by the second difference compared with default relief pressure threshold, if the second difference is big
In default relief pressure threshold, then Decompression Controlling order is generated to start the decompressing unit in oil pressure actuator.
The third aspect, the embodiment of the present invention provide a kind of pitch drive system of wind power generating set, the pitch drive system
System includes the elasticity adjusting means of wind power generating set cog belt as described above.
Because the elasticity adjusting means in the embodiment of the present invention has structure as described above, wherein, hydraulic jack
Position is fixed, and stretching one end of hydraulic jack of piston rod and the axle center of tensioning wheel are fixed, and tensioning wheel and cog belt phase
Against, therefore the oil pressure change of hydraulic jack can reflect the tensioning degree of cog belt, if than the oil pressure in hydraulic jack
Decline, then illustrate the tensioning degree relaxation of cog belt.The embodiment of the present invention by detecting the actual oil pressure value of hydraulic jack in real time,
Actual oil pressure value and cog belt are in predetermined elasticity, i.e., the oil of hydraulic jack when the tensioning degree of cog belt is normal condition
Pressure threshold value is compared, it becomes possible to which the oil pressure cntrol for obtaining implementing the oil pressure of hydraulic jack control operation instructs, and oil pressure performs
Device instructs according to the oil pressure cntrol just can implement control operation to the oil pressure of hydraulic jack, so as to reach the elastic journey to tooth form
Spend the purpose being automatically adjusted.
In addition, on the one hand obtain the reality in hydraulic jack because the elasticity adjusting means of the embodiment of the present invention will measure
Oil pressure threshold value when oil pressure value and cog belt are in predetermined elasticity is compared, then according to comparative result in hydraulic jack
Oil pressure carry out automatic and accurate adjustment, the problem of manual adjustment inaccuracy can be avoided.On the other hand, due to the embodiment of the present invention
In oil pressure actuator the tightness of cog belt can be automatically adjusted, so as to make the elasticity of cog belt all the time
In the range of predetermined elasticity, and then cog belt can be avoided situation about being broken occur.
Further, since the embodiment of the present invention can change to obtain the tensioning journey of cog belt according to the oil pressure in hydraulic jack
Degree so that attendant can need not remove live shutdown inspection, it becomes possible to the tensioning degree of cog belt be known, so as to save
About human resources and reduction downtime.
As described above, the elasticity adjusting means in the embodiment of the present invention can effectively monitor the elastic of cog belt in real time
Degree, and the tightness of cog belt can be automatically adjusted, make it all the time in the range of appropriate elasticity, with timely
The generation of trouble saving, and can substitute and examination and maintenance manually are carried out to cog belt.
Brief description of the drawings
The present invention may be better understood wherein from the description to the embodiment of the present invention below in conjunction with the accompanying drawings,
Same or analogous reference represents same or analogous feature.
Fig. 1 is the schematic diagram of tooth form belt drive structure of the prior art；
Fig. 2 is the schematic diagram that blade is in state of putting away the oars；
Fig. 3 is the schematic diagram that blade is in open mode；
Fig. 4 is that the mechanical structure of the elasticity adjusting means of wind power generating set cog belt provided in an embodiment of the present invention is shown
It is intended to；
Fig. 5 is that the electrical structure of the elasticity adjusting means of wind power generating set cog belt provided in an embodiment of the present invention shows
It is intended to；
Fig. 6 is that the structure of the elasticity adjusting means for the wind power generating set cog belt that another embodiment of the present invention provides is shown
It is intended to；
Fig. 7 is the electrical structure schematic diagram of slack adjuster corresponding with Fig. 6；
Fig. 8 is the flow signal of the elasticity adjusting method of wind power generating set cog belt provided in an embodiment of the present invention
Figure.
Description of reference numerals：
101- blades；102- wheel hubs；103- drives；104- tensioning wheels；105- cog belts；
401- hydraulic jacks；402- piston rods；501- oil pressure detectors；502- controllers；
503- oil pressure actuators；5031- presser units；5032- decompressing units；
601- first positions measurement switch；602- second places measurement switch；
701- main control PLCs；702- midway drive equipment；703- hydraulic motors；
704- hydraulic motor condition monitoring devices；705- relief valves.
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, to provide the comprehensive understanding to the embodiment of the present invention.
One embodiment of the invention provides a kind of elasticity adjusting means of wind power generating set cog belt and method, change oar pass
Dynamic system, in the pitch-controlled system of wind power generating set, using the elasticity adjusting means and method in the embodiment of the present invention,
The tightness of cog belt 105 can be adjusted in real time.
For wind power generating set when not actuated, blade is in state (referring to Fig. 2) of putting away the oars, and wind power generating set was starting
Cheng Zhong, pitch-controlled system driving blade are rotated from 90 ° to 0 ° of direction, blade is in open mode (referring to Fig. 3).
Fig. 4 and Fig. 5 are referred to, Fig. 4 is that the elasticity of wind power generating set cog belt provided in an embodiment of the present invention is adjusted
The mechanical structure schematic diagram of device.Fig. 5 is that the elasticity of wind power generating set cog belt 105 provided in an embodiment of the present invention is adjusted
The electrical structure schematic diagram of device.The elasticity adjusting means includes：Hydraulic jack 401 with piston rod 402, oil pressure detection
Device 501, controller 502 and oil pressure actuator 503.
Wherein, one end of the stretching hydraulic jack 401 of piston rod 402 and the axle center of tensioning wheel 104 are fixed, tensioning wheel
104 are arranged at the side of the wind generator set blade backwards of cog belt 105, and are leant with cog belt 105.
In one example, the one end that the hydraulic jack 401 can be stretched out in piston rod 402 sets rolling bearing, will
Tensioning wheel 104 is sheathed on rolling bearing so that tensioning wheel 104 can be around its axis rotation.
In another example, a support member with bearing can be first set, tensioning wheel 104 is removably secured to this
On support member with bearing, then the support member is connected with one end of piston rod 402 again.On the one hand, the support member is from tape spool
Hold, do not interfere with the rotation of tensioning wheel 104；On the other hand, the support member can also be between tensioning wheel 104 and piston rod 402
Thrust transmission is carried out, avoids tensioning wheel 104 because relative slide directly is occurred by thrust impact and cog belt 105.
Oil pressure detector 501 is configured as detecting the actual oil pressure m of hydraulic jack 401.Oil pressure detector 501 can be installed
In on the inwall of hydraulic jack 401.The type of oil pressure detector 501 has a variety of, and those skilled in the art can be according to actual need
Suitable oil pressure detector 501 is selected to be installed.
Controller 502 is configured as standard of comparison oil pressure M and actual oil pressure m size, and oil pressure is generated according to comparative result
Control command, when standard oil pressure M is that cog belt 105 is in predetermined elasticity, the oil pressure of hydraulic jack 401.
Wherein, predetermined elasticity refers to that cog belt 105 is under normal operating conditions, the elastic journey of cog belt 105
Degree.In one example, refering to Fig. 4, if cog belt 105 is in tensioning wheel 104 under normal operating conditions and needs to apply to cog belt 105
The active force added is N, and N direction and the tangential direction of cog belt 105 and tensioning wheel 104 are perpendicular.The standard of hydraulic jack 401
Oil pressure M, when referring to that the size and Orientation for the active force that piston rod 402 applies to tensioning wheel 104 matches with N, hydraulic jack
Oil pressure value in 401.
Controller 502 can be PLC (Programmable Logic Controller, programmable logic controller (PLC)),
Can be that other have the part of similar logical operation function.
Oil pressure actuator 503 is configured as the oil pressure cntrol order according to controller 502, to the oil pressure of hydraulic jack 401
Implement control operation.
Elasticity adjusting means according to embodiments of the present invention, the position of hydraulic jack 401 is fixed, piston rod 402
Stretching hydraulic jack 401 one end and the axle center of tensioning wheel 104 fix, and tensioning wheel 104 leans with cog belt 105, because
The oil pressure change of this hydraulic jack 401 can reflect the tensioning degree of cog belt 105, if than the oil in hydraulic jack 401
Drops, then illustrate the tensioning degree relaxation of cog belt 105.The embodiment of the present invention by detecting the reality of hydraulic jack 401 in real time
Border oil pressure value, actual oil pressure value and cog belt 105 are in predetermined elasticity, i.e. the tensioning degree of cog belt 105 is normal shape
The oil pressure threshold value of hydraulic jack 401 is compared during state, it becomes possible to obtains implementing control operation to the oil pressure of hydraulic jack 401
Oil pressure cntrol instructs, and oil pressure actuator 503 instructs according to the oil pressure cntrol just can implement control to the oil pressure of hydraulic jack 401
Operation, so as to reach the purpose being automatically adjusted to the tightness of cog belt 105.
In addition, on the one hand, obtained because the elasticity adjusting means of the embodiment of the present invention will measure in hydraulic jack 401
Oil pressure threshold value when actual oil pressure value and cog belt 105 are in predetermined elasticity is compared, then according to comparative result to liquid
Oil pressure in compressing cylinder 401 carries out automatic and accurate adjustment, the problem of can avoiding manual adjustment inaccuracy.On the other hand, due to
Oil pressure actuator 503 in the embodiment of the present invention can be automatically adjusted to the tightness of cog belt 105, so as to make
The elasticity of cog belt 105 is all the time in the range of predetermined elasticity, and then cog belt 105 can be avoided the feelings being broken occur
Condition.
Further, since the embodiment of the present invention can change to obtain of cog belt 105 according to the oil pressure in hydraulic jack 401
Tight degree so that attendant can need not remove live shutdown inspection, it becomes possible to know the tensioning degree of cog belt 105, from
And human resources can be saved and reduce downtime.
For ease of skilled artisan understands that the technical scheme of the embodiment of the present invention, below in the embodiment of the present invention
The course of work of elasticity adjusting means is described in detail.
Wherein, controller 502 can generate corresponding oil pressure cntrol according to standard oil pressure and the comparative result of actual oil pressure
Order, the corresponding oil pressure cntrol order that oil pressure actuator 503 generates according to controller 502, the oil pressure of hydraulic jack 401 is implemented
Corresponding control operation, the main situation including pressurized operation and decompression operation.
Next, the situation of pressurized operation is illustrated.
In one example, when actual oil pressure m is less than standard oil pressure M, controller 502 generates pressurized control order to start
Presser unit 5031 in oil pressure actuator 503, control presser unit 5031 perform pressurized operation, so that hydraulic jack 401
Oil pressure increases to standard oil pressure M.
In another example, when actual oil pressure m is less than standard oil pressure M, standard oil pressure M is subtracted reality by controller 502
Oil pressure m obtains the first difference M-m, by the first difference M-m compared with default pressurization threshold value a, if the first difference M-m is more than in advance
If pressurizeing threshold value a, then pressurized control order is generated to start the presser unit 5031 in oil pressure actuator 503, control pressurization list
Member 5031 performs pressurized operation, so that the oil pressure of hydraulic jack 401 increases to standard oil pressure M, or in view of oil pressure actuator
503 execution precision, the oil pressure of hydraulic jack 401 can also be made to increase in the oil pressure range of [M-a, M].
Wherein, presser unit 5031 can be hydraulic pump, and the control terminal of hydraulic pump is connected with controller 502, hydraulic pump
Input connects with fuel tank, and the output end of hydraulic pump connects with hydraulic jack 401.When performing pressurized operation, hydraulic pump according to
The pressurized control order of controller, pressurized operation is carried out to the oil of hydraulic jack 401, the oil stream in fuel tank is entered hydraulic jack
In 401.
In certain embodiments, presser unit 5031 can also be hydraulic motor, the control terminal and controller of hydraulic motor
502 connections, the operation principle and annexation between hydraulic pump and hydraulic motor are essentially identical, and the main distinction is, hydraulic pump
Power output it is larger, the power output of hydraulic motor is smaller.When performing pressurized operation, hydraulic motor adds according to controller
Control command is pressed, pressurized operation is carried out to the oil of hydraulic jack 401.
Further, elasticity adjusting means can also include pressurization monitoring unit, and pressurization monitoring unit is configured as supervising
Survey whether presser unit 5031 completes compression motion, and monitoring result is sent to controller 502, to confirm presser unit 5031
Perform the effect of pressurized operation.
Next, the situation of decompression operation is illustrated.
In one example, when actual oil pressure m is more than standard oil pressure M, controller 502 generates Decompression Controlling order to start
Decompressing unit 5032 in oil pressure actuator 503, control decompressing unit 5032 perform decompression operation, make the oil of hydraulic jack 401
Pressure drop as little as standard oil pressure M.
In another example, when actual oil pressure m is more than standard oil pressure M, actual oil pressure m is subtracted into standard oil pressure M and obtained
Second difference m-M, by the second difference m-M compared with default relief pressure threshold b, if the second difference m-M is more than default decompression threshold
Value b, then Decompression Controlling order is generated to start the decompressing unit 5032 in oil pressure actuator 503, control decompressing unit 5032 is held
Row decompression operation, the oil pressure of hydraulic jack 401 is reduced to standard oil pressure M, or essence is performed in view of oil pressure actuator 503
Degree, can also be such that the oil pressure of hydraulic jack 401 is reduced in the oil pressure range of [M, M+b].
Wherein, decompressing unit 5032 can be relief valve, and the control terminal of relief valve is connected with controller 502, and relief valve is set
It is placed on the pipeline between hydraulic jack 401 and fuel tank.The specific implementation form of relief valve can be electromagnetic type relief valve, also may be used
Think mechanical relief valve.Wherein, electromagnetic type relief valve has the advantages of easy to control, stable performance.When execution decompression operation
When, relief valve is opened after the Decompression Controlling order of controller 502 is received, to release unnecessary pressure.
In embodiments of the present invention, for the oil pressure of hydraulic jack is maintained near standard oil pressure M, the He of presser unit 5031
Decompressing unit 5032 can be performed in unison with pressurized operation and decompression operation.Exemplarily, when the oil pressure for detecting hydraulic jack 401
During less than M-a, that is, exceed the oil pressure range of [M-a, M], then controller 502 controls presser unit 5031 to start, by presser unit
The oil pressure of 5031 pairs of hydraulic jacks 401 carries out pressurized operation, makes the oil pressure of hydraulic jack 401 increase；When detecting hydraulic jack
When 401 oil pressure increases to greater than M+b, that is, exceed the oil pressure range of [M, M+b], then controller 502 controls decompressing unit 5032
Start, pressure discharge operations are carried out to the oil of hydraulic jack 401, the oil pressure of hydraulic jack 401 is adjusted to the oil pressure of [M-a, M+b]
In the range of.
Wherein, presser unit 5031 and decompressing unit 5032 can be after a pressurized operation and decompression operation be performed, will
The oil pressure of hydraulic jack 401 is adjusted to the oil pressure range of [M-a, M+b]；Multiple pressurized operation and decompression behaviour can also performed
After work, the oil pressure of hydraulic jack 401 is adjusted to the oil pressure range of [M-a, M+b].
According to an embodiment of the invention, after the oil pressure for detecting hydraulic jack 401 is more than M+b, controller 502 can be stood
Send and cease and desist order to presser unit 5031, presser unit 5031 is stopped pressurized operation；Can not also be single to pressurization immediately
Member 5031 sends and ceased and desisted order, but on the premise of pressurized operation is not stopped, directly send decompression control to decompressing unit 5032
System order, to start decompressing unit 5032, releases unnecessary pressure.
According to an embodiment of the invention, decompressing unit 5032 can also need not receive the order of controller 502, but certainly
Band calculation function, can be that decompressing unit 5032 sets a relief pressure threshold, such as 0.05Mp, when the oil pressure of hydraulic jack 401
During more than 0.05Mp, the automatic start of decompressing unit 5032, to release unnecessary pressure, when the oil pressure of hydraulic jack 401 is less than
During 0.05Mp, decompressing unit 5032 is closed automatically.
According to an embodiment of the invention, when actual oil pressure m is equal to standard oil pressure M, or the first difference M-m is less than or equal to
Default pressurization threshold value a, or the second difference m-M are less than or equal to default relief pressure threshold b, i.e. the oil pressure of hydraulic jack 401 is in
During the oil pressure range of [M-a, M+b], it is only necessary to carry out pressurize operation to the oil pressure of hydraulic jack 401, generated without controller 502
Any control instruction.
Fig. 6 is the knot of the elasticity adjusting means for the wind power generating set cog belt 105 that another embodiment of the present invention provides
Structure schematic diagram.Fig. 6 and Fig. 4 difference is that the elasticity adjusting means in Fig. 6 also includes first position measurement switch
601 and the second place measurement switch 602.
Wherein, first position measurement switch 601 is arranged on the elongation path of piston rod 402.First position measurement switch
601 are configured as, when piston rod 402 is measured at 601 positions of switch by first position, representative being sent to controller 502
The tensioning degree of cog belt 105 is the feedback signal in alarm condition.
The specific implementation form of first position measurement switch 601 and second place measurement switch 602 can be mechanical row
Cheng Kaiguan, it is arranged in hydraulic jack 401, when piston rod 402 is switched at position by the trip and touches the trip
During switch, the trip switch triggering；It can also be electromagnetic type search switch, be arranged at outside hydraulic jack 401, electromagnetic type detection is opened
Close can sense piston rod 402 by when trigger.Those skilled in the art can select suitable position to survey as needed
Amount switch, herein without limiting.
According to an embodiment of the invention, when first position measurement 601 triggering of switch, the extension of piston rod 402 is illustrated
Point longer, now controller 502 can send alarm signal to wind power generating set.And examined in maintenance down next time
Cog belt 105 is looked into, finds out and causes piston rod 402 to stretch out the reason for long, to carry out failture evacuation in time.
Second place measurement switch 602 is arranged on the elongation path of piston rod 402, and positioned at first position measurement switch
601 sides away from hydraulic jack 401, second place measurement switch 602 are configured as surveying by the second place in piston rod 402
When at 602 positions of amount switch, the tensioning degree for representing cog belt 105 is sent to controller 502 as in limiting condition
Feedback signal.
According to an embodiment of the invention, when second place measurement 602 triggering of switch, the extension of piston rod 402 is illustrated
Divide and have arrived at the limit, now controller 502 can send fault-signal, and shutdown inspection immediately to wind power generating set, look into
Bright the reason for causing the extension of piston rod 402 to reach the limit of, avoid bringing bigger potential safety hazard.
Also referring to Fig. 7, Fig. 7 is the electrical structure schematic diagram of slack adjuster corresponding with Fig. 6.In view of wind-force
The cost of generating set, the logic that can be responsible for performing elasticity adjusting means by the main control PLC 701 of wind power generating set are transported
Calculate.
Wherein, oil pressure detector 501 is connected with main control PLC 701, can detect the simultaneously cavity of feedback hydraulic oil cylinder 401 in real time
Interior oil pressure size.The oil pressure size that main control PLC 701 is fed back according to oil pressure detector 501 generates oil pressure cntrol order, for example adds
Press control command or Decompression Controlling order.
Hydraulic motor 703 is connected with main control PLC 701, can carry out pressurized operation to the oil of hydraulic jack 401.Due to master
Control PLC701 can not meet the voltage class requirement that hydraulic motor 703 works required, can be carried out by midway drive equipment 702
Share.
Midway drive equipment 702 is responsible for receiving the control command of main control PLC 701, according to the control command of main control PLC 701
Driving hydraulic motor 703 works.Wherein, midway drive equipment 702 can be auxiliary reclay or A.C. contactor.Middle relay
The structure and operation principle of device and A.C. contactor are essentially identical, and the main distinction is, the main contact of A.C. contactor can lead to
Super-high-current, and the contact of auxiliary reclay can only pass through low current.
PLC701 pressurized control order whether is effectively perform for monitoring hydraulic motor 703, hydraulic pressure can also be set up
Motor condition monitoring device 704.Hydraulic motor condition monitoring device 704 is connected with main control PLC 701, if hydraulic motor 703 fails
The pressurized control order of main control PLC 701 is effectively performed, then needs to send shutdown request to main control PLC 701, is stopped with carrying out failure
Machine check.In one example, hydraulic motor condition monitoring device 704 can be rotary encoder, and the rotary encoder can be set
It is placed in the rotary shaft of hydraulic motor 703, the rotary encoder can be with the rotation of rotary shaft, and records the rotating speed number of rotary shaft
According to.
Relief valve 705 is connected with main control PLC 701, can be the oily pressure release in hydraulic jack 401.Relief valve 705 can be
Start during the Decompression Controlling order for receiving main control PLC 701, pressure discharge operations are carried out to the oil in hydraulic jack 401；Can also be certainly
Band calculation function, such as, can be that relief valve 705 sets pressure release threshold value, when the oil pressure in hydraulic jack 401 is more than pressure release threshold value
When, relief valve 705 is automatically turned on, and when the oil pressure in hydraulic jack 401 is less than pressure release threshold value, relief valve 705 is closed automatically.
First position measurement switch 601 and second place measurement switch 602 are connected with main control PLC 701 respectively.Work as piston rod
402 to tensioning wheel direction move when, piston rod 402 first passes through first position measurement switch 601, when piston rod 402 is moved to the
When one position measurement is switched at 601 positions, first position measurement switch 601, which is triggered and sent to main control PLC 701, represents tooth
The tensioning degree of shape band is the feedback signal in alarm condition.Now, illustrate that the extension of piston rod 402 is longer,
Cog belt should be checked in maintenance down next time, finds out and causes piston rod 402 to stretch out the reason for long, to carry out failure in time
Exclude.
If piston rod 402 continues to move to the direction of tensioning wheel 104, works as work after first position measurement switch 601
When stopper rod 402 is moved at 602 positions of measurement switch of the second place, the triggering of second place measurement switch 602 and to master control
PLC701, which is sent, represents the tensioning degree of cog belt 105 as the feedback signal in limiting condition.Now, piston rod 402 is illustrated
Extension have arrived at the limit, and answer hard stop inspection, find out the original for causing the extension of piston rod 402 to reach the limit of
Cause, avoid bringing bigger potential safety hazard.
Fig. 8 is the schematic flow sheet of the elastic adjusting method of wind power generating set cog belt provided in an embodiment of the present invention,
For the elasticity adjusting means of wind power generating set cog belt 105 as described above, the elastic adjusting method includes step 801
To step 803.
In step 801, the actual oil pressure of hydraulic jack 401 is detected by oil pressure detector 501.
In step 802, by the size of the standard of comparison oil pressure of controller 502 and the actual oil pressure, according to comparative result
Oil pressure cntrol order is generated, standard oil pressure is the oil pressure of hydraulic jack 401 when cog belt 105 is in predetermined elasticity.
In step 803, the oil pressure cntrol order by oil pressure actuator 503 according to controller 502, to hydraulic jack 401
Oil pressure implement control operation.
Wherein, in step 802, controller 502 can be corresponding according to standard oil pressure and the comparative result of actual oil pressure, generation
Oil pressure cntrol order, in step 803, the corresponding oil pressure cntrol that oil pressure actuator 503 can generate according to controller 502 is ordered
Order, corresponding control operation, the main situation including pressurized operation and decompression operation are implemented to the oil pressure of hydraulic jack 401.
Next, the situation of pressurized operation is illustrated.
In one example, when actual oil pressure m is less than standard oil pressure M, controller 502 generates pressurized control order to start
Presser unit in oil pressure actuator 503, control presser unit perform pressurized operation, so that the oil pressure increase of hydraulic jack 401
To standard oil pressure M.
In another example, when actual oil pressure m is less than standard oil pressure M, standard oil pressure M is subtracted reality by controller 502
Oil pressure m obtains the first difference M-m, by the first difference M-m compared with default pressurization threshold value a, if the first difference M-m is more than in advance
If pressurizeing threshold value a, then pressurized control order is generated to start the presser unit in oil pressure actuator 503, control presser unit is held
Row pressurized operation, so that the oil pressure of hydraulic jack 401 increases to standard oil pressure M.
Next, the situation of decompression operation is illustrated.
In one example, when actual oil pressure m is more than standard oil pressure M, controller 502 generates Decompression Controlling order to start
Decompressing unit in oil pressure actuator 503, control decompressing unit perform decompression operation, are reduced to the oil pressure of hydraulic jack 401
Standard oil pressure M.
In another example, when actual oil pressure m is more than standard oil pressure M, actual oil pressure m is subtracted into standard oil pressure M and obtained
Second difference m-M, by the second difference m-M compared with default relief pressure threshold b, if the second difference m-M is more than default decompression threshold
Value b, then Decompression Controlling order is generated to start the decompressing unit in oil pressure actuator 503, control decompressing unit performs decompression behaviour
Make, the oil pressure of hydraulic jack 401 is reduced to standard oil pressure M.
According to an embodiment of the invention, when actual oil pressure m is equal to standard oil pressure M, or the first difference M-m is less than or equal to
Default pressurization threshold value a, or when the second difference m-M is less than or equal to default relief pressure threshold b, only needing can be to hydraulic jack 401
Oil pressure carry out pressurize operation, generate any control instruction without controller 502.
The embodiment of the present invention also provides a kind of pitch drive system of wind power generating set, including wind-force as described above hair
The elasticity adjusting means of group of motors cog belt, the tightness for ensureing cog belt 105 can be effectively monitored, and cause cog belt
105 tightness is in appropriate state all the time, further, since elasticity adjusting means can be automatic in the embodiment of the present invention
Operation, so as to avoid artificial inspection, safeguard and caused by substantial amounts of waste of time.
It should be clear that each embodiment in this specification is described by the way of progressive, each embodiment it
Between same or analogous part mutually referring to, what each embodiment stressed be it is different from other embodiment it
Place.For device embodiment, related part may refer to the declaratives of embodiment of the method.Not office of the embodiment of the present invention
It is limited to particular step and structure described above and shown in figure.Those skilled in the art can understand the present invention in fact
After the spirit for applying example, it is variously modified, changes and adds, or changes the order between step.Also, risen in order to concise
See, omit the detailed description to known method technology here.
Functional block shown in structures described above block diagram can be implemented as hardware, software, firmware or their group
Close.When realizing in hardware, its may, for example, be electronic circuit, application specific integrated circuit (ASIC), appropriate firmware, insert
Part, function card etc..When being realized with software mode, the element of the embodiment of the present invention is configured to perform required task
Program or code segment.Either code segment can be stored in machine readable media or the number by being carried in carrier wave program
It is believed that number being sent in transmission medium or communication links." machine readable media " can include storing or transmitting information
Any medium.The example of machine readable media includes electronic circuit, semiconductor memory devices, ROM, flash memory, erasable ROM
(EROM), floppy disk, CD-ROM, CD, hard disk, fiber medium, radio frequency (RF) link, etc..Code segment can via such as because
The computer network of special net, Intranet etc. is downloaded.
Claims (17)
1. a kind of elasticity adjusting means of wind power generating set cog belt, the wind generator set blade backwards of the cog belt
Side be provided with tensioning wheel, the tensioning wheel leans with the cog belt, it is characterised in that the elasticity adjusting means
Including：
Hydraulic jack with piston rod, one end of the stretching hydraulic jack and the axle center of tensioning wheel of the piston rod are consolidated
It is fixed；
Oil pressure detector, it is configured as detecting the actual oil pressure of the hydraulic jack；
Controller, the size of standard of comparison oil pressure and the actual oil pressure is configured as, oil pressure cntrol is generated according to comparative result
Order；Wherein, when the standard oil pressure is that the cog belt is in predetermined elasticity, the oil pressure of the hydraulic jack；
The oil pressure actuator, it is configured as according to the oil pressure cntrol order, control is implemented to the oil pressure of the hydraulic jack
Operation.
2. elasticity adjusting means according to claim 1, it is characterised in that the controller is specifically configured to：
When the actual oil pressure is less than the standard oil pressure, pressurized control order is generated to start in the oil pressure actuator
Presser unit, control the presser unit to perform pressurized operation, the oil pressure of the hydraulic jack is increased to the standard oil pressure.
3. elasticity adjusting means according to claim 2, it is characterised in that the controller is specifically configured to：
When the actual oil pressure is less than the standard oil pressure, the standard oil pressure is subtracted into the actual oil pressure, and to obtain first poor
Value, by first difference compared with default pressurization threshold value, if first difference is more than the default pressurization threshold value,
Generation pressurized control order controls the presser unit to perform pressurization behaviour to start the presser unit in the oil pressure actuator
Make, the oil pressure of the hydraulic jack is increased to the standard oil pressure.
4. elasticity adjusting means according to claim 2, it is characterised in that the presser unit includes hydraulic pump, institute
The control terminal for stating hydraulic pump is connected with the controller, and the input of the hydraulic pump connects with fuel tank, the hydraulic pump it is defeated
Go out end to connect with the hydraulic jack.
5. elasticity adjusting means according to claim 2, it is characterised in that the elasticity adjusting means also includes adding
Monitoring unit is pressed, the pressurization monitoring unit is configured as monitoring whether the presser unit completes compression motion, and will monitoring
As a result send to the controller.
6. elasticity adjusting means according to claim 1, it is characterised in that the controller is specifically configured to：
When the actual oil pressure is more than the standard oil pressure, Decompression Controlling order is generated to start in the oil pressure actuator
Decompressing unit, control the decompressing unit to perform decompression operation, the oil pressure of the hydraulic jack is reduced to the standard oil pressure.
7. elasticity adjusting means according to claim 6, it is characterised in that the controller is specifically configured to：
When the actual oil pressure is more than the standard oil pressure, the actual oil pressure is subtracted into the standard oil pressure, and to obtain second poor
Value, by second difference compared with default relief pressure threshold, if second difference is more than the default relief pressure threshold,
Generation Decompression Controlling order controls the decompressing unit to perform decompression behaviour to start the decompressing unit in the oil pressure actuator
Make, the oil pressure of the hydraulic jack is reduced to the standard oil pressure.
8. elasticity adjusting means according to claim 6, it is characterised in that the decompressing unit includes relief valve, institute
The control terminal for stating relief valve is connected with the controller, and the relief valve is arranged between the hydraulic jack and the fuel tank
On pipeline.
9. elasticity adjusting means according to claim 1, it is characterised in that the elasticity adjusting means also includes the
One position measurement is switched, and the first position measurement switch is arranged on the elongation path of the piston rod, the first position
Measurement switch is configured as when the piston rod is by the measurement switch position of the first position, to the controller
Send and represent the tensioning degree of the cog belt as the feedback signal in alarm condition.
10. elasticity adjusting means according to claim 9, it is characterised in that the elasticity adjusting means also includes
Second place measurement switch, the second place measurement switch are arranged on the elongation path of the piston rod, and positioned at described
The side of the close tensioning wheel of first position measurement switch, the second place measurement switch are configured as in the piston
When bar is by the measurement switch position of the second place, the tensioning journey for representing the cog belt is sent to the controller
Spend for the feedback signal in limiting condition.
11. elasticity adjusting means according to claim 1, it is characterised in that the stretching hydraulic pressure of the piston rod
One end of oil cylinder is provided with rolling bearing, and the tensioning wheel is sheathed on the rolling bearing.
A kind of 12. elastic adjusting method of wind power generating set cog belt, for as described in claim 1-11 any one
The elasticity adjusting means of wind power generating set cog belt, it is characterised in that the elastic adjusting method includes：
The actual oil pressure of the hydraulic jack is detected by the oil pressure detector；
By the size of the controller standard of comparison oil pressure and the actual oil pressure, oil pressure cntrol life is generated according to comparative result
Order；Wherein, when the standard oil pressure is that the cog belt is in predetermined elasticity, the oil pressure of the hydraulic jack；
Oil pressure cntrol order by the oil pressure actuator according to the controller, control is implemented to the oil pressure of the hydraulic jack
Operation.
13. elastic adjusting method according to claim 11, it is characterised in that described that oil pressure control is generated according to comparative result
System order, including：
When the actual oil pressure is less than the standard oil pressure, pressurized control order is generated by the controller to start the oil
The presser unit in actuator is pressed, controls the presser unit to perform pressurized operation, increases to the oil pressure of the hydraulic jack
The standard oil pressure.
14. elastic adjusting method according to claim 14, it is characterised in that described when the actual oil pressure is less than described
During standard oil pressure, pressurized control order is generated to start the presser unit in the oil pressure actuator by the controller, including：
When the actual oil pressure is less than the standard oil pressure, the standard oil pressure is subtracted into the actual oil by the controller
Pressure obtains the first difference, by first difference compared with default pressurization threshold value, if first difference is more than described pre-
If pressurizeing threshold value, then pressurized control order is generated to start the presser unit in the oil pressure actuator.
15. elastic adjusting method according to claim 11, it is characterised in that described that oil pressure control is generated according to comparative result
System order, in addition to：
When the actual oil pressure is more than the standard oil pressure, Decompression Controlling order is generated by the controller to start the oil
The decompressing unit in actuator is pressed, controls the decompressing unit to perform decompression operation, is reduced to the oil pressure of the hydraulic jack
The standard oil pressure.
16. elastic adjusting method according to claim 15, it is characterised in that described when the actual oil pressure is more than described
During standard oil pressure, Decompression Controlling order is generated to start the decompressing unit in the oil pressure actuator by the controller, including：
When the actual oil pressure is more than the standard oil pressure, the actual oil pressure is subtracted into the standard oil by the controller
Pressure obtains the second difference, by second difference compared with default relief pressure threshold, if second difference is more than described pre-
If relief pressure threshold, then Decompression Controlling order is generated to start the decompressing unit in the oil pressure actuator.
17. the pitch drive system of a kind of wind power generating set, it is characterised in that including such as claim 1-11 any one institute
The elasticity adjusting means for the wind power generating set cog belt stated.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710876141.3A CN107781366B (en) | 2017-09-25 | 2017-09-25 | Device and method for adjusting tightness of toothed belt and variable pitch transmission system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710876141.3A CN107781366B (en) | 2017-09-25 | 2017-09-25 | Device and method for adjusting tightness of toothed belt and variable pitch transmission system |
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| CN107781366B CN107781366B (en) | 2020-04-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115077897A (en) * | 2022-06-22 | 2022-09-20 | 燕山大学 | Toothed belt dynamic fatigue test device used in salt spray environment |
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| EP0588066A1 (en) * | 1992-09-17 | 1994-03-23 | JOH. WINKLHOFER & SÖHNE GmbH & Co KG | Belt tensioning device |
| EP1092103A1 (en) * | 1998-06-30 | 2001-04-18 | RENOLD Plc | Method and apparatus for tensioning a chain of an internal combustion engine |
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|---|---|
| CN107781366B (en) | 2020-04-07 |
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Address after: No.107 Shanghai Road, Urumqi Economic and Technological Development Zone, Urumqi City, Xinjiang Uygur Autonomous Region Patentee after: Jinfeng Technology Co.,Ltd. Address before: No.107 Shanghai Road, Urumqi Economic and Technological Development Zone, Urumqi City, Xinjiang Uygur Autonomous Region Patentee before: XINJIANG GOLDWIND SCIENCE & TECHNOLOGY Co.,Ltd. |