CN109667714A - Fluid pressure pitch-controlled system and its control method - Google Patents
Fluid pressure pitch-controlled system and its control method Download PDFInfo
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- CN109667714A CN109667714A CN201710966407.3A CN201710966407A CN109667714A CN 109667714 A CN109667714 A CN 109667714A CN 201710966407 A CN201710966407 A CN 201710966407A CN 109667714 A CN109667714 A CN 109667714A
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- 239000012530 fluid Substances 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000004146 energy storage Methods 0.000 claims abstract description 25
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 7
- 230000033001 locomotion Effects 0.000 claims description 22
- 239000007788 liquid Substances 0.000 claims description 10
- 230000004044 response Effects 0.000 claims description 5
- 230000003068 static effect Effects 0.000 claims description 5
- 238000009825 accumulation Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 14
- 239000003921 oil Substances 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 6
- 230000005611 electricity Effects 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
- 230000003044 adaptive effect Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 230000018199 S phase Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000001360 synchronised effect Effects 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
-
- 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
- F05B2260/00—Function
- F05B2260/70—Adjusting of angle of incidence or attack of rotating blades
-
- 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
- F05B2270/604—Control system actuates through hydraulic 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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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
- Wind Motors (AREA)
Abstract
The invention discloses fluid pressure pitch-controlled system and its control methods.A kind of fluid pressure pitch-controlled system includes energy-storage module, driver, motor, hydraulic pump, valve block and executing agency.Energy-storage module is connected to driver to power to driver；Driver is connected to motor with driving motor and controls the operation of motor；Motor is connected to hydraulic pump to drive hydraulic pump；Valve block is connected to driver, hydraulic pump and executing agency, the opening and closing of driver control valve block, and hydraulic pump conveys hydraulic oil by valve block to drive executing agency；Executing agency is connected to variable pitch disk to drive variable pitch disc spins.The system can have better stability and reliability, and the control efficiency of the system is higher, operation is safer, and saves space and cost.
Description
Technical field
The invention belongs to wind power generation field, it is related to a kind of fluid pressure pitch-controlled system and its control method, the system
The pitch control of wind power generating set is used for method.
Background technique
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 petroleum, coal, the natural gas of energy mainstay are reduced increasingly.Currently, many countries are all
Wind-power electricity generation is being greatly developed, for wind-power electricity generation as new energy, scale is gradually mature.
Wind power generating set is the equipment for converting wind energy into electric energy.In the pitch-controlled system of wind power generating set, generally
Using the electronic scheme for passing through gear or toothed belt driving blade by the motor of adjustable speed or use by proportional valve control liquid
Cylinder pressure directly acts on the open hydraulic pitch-controlled system of pitch variable bearings.
In the wind power generating set of big megawatt of linear leaf, electric variable pitch is limited to the fatigue or the limit of toothed belt or gear
Intensity, and response frequency is lower.On the other hand, the open hydraulic pitch-controlled system needs of traditional valve-controlled cylinder integrate larger in cabin
Hydraulic station and the easily loss component such as ancillary filter device and rotary joint, energy storage mode is also only limitted to the lower accumulation of energy of energy density
Device.
Summary of the invention
For overcome the deficiencies in the prior art, the present invention provides a kind of novel fluid pressure pitch-controlled system and its controlling party
Method.
The present invention provides a kind of fluid pressure pitch-controlled system, and the fluid pressure pitch-controlled system includes energy-storage module, driving
Device, motor, hydraulic pump, valve block and executing agency.Energy-storage module is connected at least one of driver and valve block, to provide
Power；Driver is connected to motor with driving motor and controls the operation of motor；Motor is connected to hydraulic pump to drive hydraulic pump；
Valve block is connected to driver, hydraulic pump and executing agency, and driver control valve block opens or closes, and hydraulic pump is defeated by valve block
Liquor charging pressure oil is to drive executing agency；Executing agency is connected to variable pitch disk to drive variable pitch disc spins.
According to one embodiment of present invention, energy-storage module includes electric energy accumulator or/and accumulator, and electric energy accumulator is connected to
For driver to power to driver, accumulator is connected to valve block, and hydraulic pump is selectively conveyed to accumulator hydraulic by valve block
Oil, to store energy in accumulator.
According to one embodiment of present invention, valve block includes at least one reversal valve, for controlling the movement of executing agency
Direction；Or/and valve block includes the valve for making accumulator be connected with executing agency and be isolated.
According to one embodiment of present invention, when electric energy accumulator stops powering to driver, driver is to the valve
The signal of instruction power down is sent, the valve is opened in response to the signal that receives so that accumulator and executing agency's phase
Connection drives executing agency with the energy using accumulator storage, and then variable pitch disk is driven to execute feathering.
According to one embodiment of present invention, output electric current, the revolving speed of hydraulic pump, executing agency of the driver based on motor
Movement position control the revolving speed and input current of motor, to control the flow and pressure of hydraulic pump.
According to one embodiment of present invention, executing agency includes one or more hydraulic motors；Alternatively, executing agency wraps
Include one or more hydraulic cylinders.
According to one embodiment of present invention, hydraulic pump is quantitative hydraulic pump.
The present invention also provides a kind of control method of fluid pressure pitch-controlled system, the control method includes: to utilize liquid
The energy-storage module of static pressure pitch-controlled system provides power to fluid pressure pitch-controlled system；Utilize the driver of fluid pressure pitch-controlled system
It drives the motor of fluid pressure pitch-controlled system and controls the operation of motor；Utilize the hydraulic of motor driven liquid static pressure pitch-controlled system
Pump, and the flow and pressure of hydraulic pump are only controlled by the operation of driver control motor；Liquid is driven using hydraulic pump
The executing agency of static pressure pitch-controlled system is to drive variable pitch disc spins.
According to one embodiment of present invention, the step of driving executing agency using hydraulic pump includes: logical using hydraulic pump
The valve block conveying hydraulic oil of fluid pressure pitch-controlled system is crossed to drive executing agency, also, the control method further include: utilize
Valve block described in driver control opens or closes, to control the direction of motion of executing agency.
According to one embodiment of present invention, the step of controlling the operation of motor includes: output of the driver based on motor
Electric current, the revolving speed of hydraulic pump, executing agency movement position control the revolving speed and input current of motor, to control hydraulic pump
Flow and pressure.
According to one embodiment of present invention, the control method further include: when the electric energy accumulator in energy-storage module stops
When powering to driver, driver sends the signal of instruction driver power down to valve block, and the valve block is described in response to receiving
Signal and so that accumulator and executing agency in energy-storage module is connected, with using accumulator storage energy drive execution machine
Structure, and then variable pitch disk is driven to execute feathering.
Fluid pressure pitch-controlled system according to the present invention and its control method have the advantage that and avoid gear and toothed belt
Limitation of the intensity of equal executing agencies to pitch-controlled system；Traditional open type hydraulic system is replaced by closed type hydraulic system, is improved
The integrated level and reliability of system；It can be compatible with electric energy storage and hydraulic accumulation energy, the selection of energy storage mode is more flexible.
Part in following description is illustrated into the other aspect and/or advantage of present general inventive concept, there are also one
Dividing will be apparent by description, or can learn by the implementation of present general inventive concept.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the fluid pressure pitch-controlled system of embodiment according to the present invention.
Fig. 2 is the control block diagram of the fluid pressure pitch-controlled system of embodiment according to the present invention.
Fig. 3 is embodiment according to the present invention using hydraulic cylinder as the schematic diagram of executing agency.
Fig. 4 is embodiment according to the present invention using hydraulic cylinder as another schematic diagram of executing agency.
Fig. 5 is embodiment according to the present invention using hydraulic motor as the schematic diagram of executing agency.
Fig. 6 is embodiment according to the present invention using hydraulic motor as another schematic diagram of executing agency.
Fig. 7 is the structural schematic diagram of fluid pressure pitch-controlled system according to another embodiment of the present invention.
Specific embodiment
For keep the above objects, features and advantages of the present invention more obvious and it can be readily appreciated that with reference to the accompanying drawing and
The present invention is described in further detail for specific embodiment.
The present invention provides a kind of fluid pressure pitch-controlled system.Fig. 1 is the fluid pressure variable pitch of embodiment according to the present invention
The structural schematic diagram of system 1.Referring to Fig.1, fluid pressure pitch-controlled system 1 includes electric energy accumulator 11, driver 12, motor 13, liquid
Press pump 14, executing agency 15, valve block 16 and accumulator 17.
Electric energy accumulator 11 is connected to driver to power to driver 12, and electric energy accumulator 11 can be based on capacitor or electricity
The electric energy accumulator of pool technology.Driver 12 is connected to motor 13 with driving motor 13 and controls the operation of motor 13.Motor 13 connects
Hydraulic pump 14 is connected to drive hydraulic pump 14.Motor 13 can be synchronous motor, asynchronous machine, brshless DC motor, ordinary straight
Galvanic electricity machine, stepper motor or switched reluctance machines.Valve block 16 is connected to driver 12, hydraulic pump 14 and executing agency 15, driving
Device 12 controls the opening and closing of valve block 16, and hydraulic pump 14 conveys hydraulic oil by valve block 16 to drive executing agency 15.It executes
Mechanism 15 is connected to variable pitch disk (not shown) to drive variable pitch disc spins.Executing agency 15 may include one or more hydraulic horses
It reaches.Optionally, executing agency 15 may include one or more hydraulic cylinders.Accumulator 17 is connected to valve block 16, and hydraulic pump 14 is logical
It crosses valve block 16 and selectively conveys hydraulic oil to accumulator 17, to store energy in accumulator 17.Accumulator 17 can be one
The combination of a or multiple accumulators.
Executing agency 15 by 16 property of can choose of valve block is connected to hydraulic pump 14 or accumulator 17, so as to flexible
With the hydraulic energy in the electric energy and accumulator 17 in electric energy accumulator 11.
According to an embodiment of the invention, valve block 16 includes at least one reversal valve (not shown), driver 12 controls described
The opening and closing of at least one reversal valve, to control the direction of motion of executing agency 15.Valve block 16 may also include for making to store
Can the valve (not shown) that is connected and is isolated with executing agency 15 of device 17, what driver 12 controlled the valve beats on and off
It closes.When driver 12 opens the valve, accumulator 17 is connected with executing agency 15, with what is stored using accumulator 17
Energy drives executing agency 15；When driver 12 closes the valve, accumulator 17 is isolated with executing agency 15.Example
Such as, when fluid pressure pitch-controlled system 1 is by normal power supply, without urgent suitable slurry, the valve closure, to keep
Accumulator 17 is isolated with executing agency 15.When electric energy accumulator 11 stops powering to driver 12, driver 12 is to the valve
Door send instruction driver power down signal, the valve in response to receive the signal and open so that accumulator 17 with hold
Row mechanism 15 is connected, and drives executing agency 15 using the energy that accumulator 17 stores, and then variable pitch disk (not shown) is driven to hold
Row feathering.For example, can pass through accumulator 17 when system power supply is cut-off or generating system failure and drive executing agency 15
It executes promptly along slurry, so that the blades withdraw of wind power generating set is to home, to guarantee the operation of wind power generating set
Safety.
According to an embodiment of the invention, fluid pressure pitch-controlled system 1 is Electrical hydrostatic actuator (EHA) system, hydraulic pump
14 can be quantitative hydraulic pump, for example, vane pump, gear pump, plunger pump or screw pump.In fluid pressure pitch-controlled system 1, drive
Dynamic device 12 realizes that the variable of hydraulic pump 14 is exported by controlling the revolving speed of motor 13, and then hydraulic pump 14 drives executing agency 14
To drive variable pitch disk and the rotation of blade of wind power generating set.That is, the present invention realizes wind power generating set using pump control strategy
Pitch control.
The working principle of fluid pressure pitch-controlled system 1 is briefly described below.The movement velocity of executing agency 15 takes
Certainly in the flow of hydraulic pump 14 output hydraulic pressure oil, there are following relationships for the revolving speed of the flow and hydraulic pump 14:
Wherein, n is the revolving speed of hydraulic pump 14, and Q is the flow of 14 output hydraulic pressure of hydraulic pump oil, and Vs is the row of hydraulic pump 14
Amount, ηvolFor volume efficiency.
Relationship between the torque of executing agency 15 and the relevant parameter of hydraulic pump 14 is as follows:
Wherein, M is the torque of executing agency 15, and p is the fuel feeding pressure of hydraulic pump 14, and Vs is the discharge capacity of hydraulic pump 14, ηhm
For transmission efficiency, moreover, the voltage of torque M and motor 13 is similar to proportional relation in controlled range.
Although the hydraulic pump 14 specifically illustrated herein is quantitative hydraulic pump, according to actual needs, hydraulic pump 14 can also
To be volume adjustable hydraulic pump, in favor of realizing more precise control.
Mathematical relationship from the description above, present invention additionally contemplates that inherently non-thread of fluid pressure pitch-controlled system 1
Property characteristic (for example, fluid pressure pitch-controlled system 1 according to the movement position of executing agency 15 and adjust gain compensate, fluid pressure
1 intrinsic frequency of pitch-controlled system changes, and in the direction of motion switching of executing agency 15, fluid pressure pitch-controlled system 1 can be cut
Change the associated control parameters of controlled device).Accordingly, the present invention designs a kind of control applied to fluid pressure pitch-controlled system 1
Method.
Control method is illustrated below in conjunction with Fig. 2.Fig. 2 is the fluid pressure variable pitch of embodiment according to the present invention
The control block diagram of system.
Referring to Fig. 2, according to an embodiment of the invention, fluid pressure pitch-controlled system 1 is close loop negative feedback control system.Driving
Device 12 controls the operation of motor 13 according to input instruction 201.Fig. 2 shows close loop negative feedback control system in, driver 12
Also controlled based on the output electric current 205 of motor, hydraulic revolution speed 206, executing agency's movement position 207 motor 13 revolving speed and
Input current.
Specifically, it can use the output electric current of the measurement devices such as Hall sensor measurement motor 13, i.e., motor is defeated
Electric current 205 out, driver 12 is by the output electric current 205 of motor as the negative feedback current signal for being used for current of electric control 204.
It can use the output shaft revolving speed of the measurement devices such as encoder, ultrasonic sensor measurement motor 13, and then calculate
Hydraulic revolution speed 206 and executing agency's movement position 207 out.Hydraulic revolution speed 206 is used as and is used for motor speed by driver 12
The negative-feedback tach signal of control 203, also, executing agency's movement position 207 is used as and is used for self adaptive control by driver 12
202 negative-feedback position signal.In self adaptive control 202, self adaptive control can be implemented by driver 12 to liquid
Static pressure pitch-controlled system 1 carries out nonlinear compensation.Further, it is also possible to directly measure execution using measurement devices such as ultrasonic sensors
The revolving speed and executing agency's movement position 207 of mechanism 15 can obtain hydraulic revolution speed 206 according to the revolving speed of executing agency 15.
As described above, driver 12 can control entire fluid pressure pitch-controlled system 1 by controlling the operation of motor.
According to an embodiment of the invention, the executing agency 15 connecting with variable pitch disk can be hydraulic cylinder or hydraulic motor.
Fig. 3 is the leaf for making wind power generating set when by hydraulic cylinder 22 as executing agency of embodiment according to the present invention
Piece 23 rotate to 0 degree propeller pitch angle schematic diagram, Fig. 4 be embodiment according to the present invention by hydraulic cylinder 22 be used as executing agency
When make wind power generating set blade 23 rotate to 90 degree of propeller pitch angles another schematic diagram.As shown in Figure 3 and Figure 4, it is shown here
Fluid pressure pitch-controlled system hydraulic cylinder 22 is connected to variable pitch disk 21 so that hydraulic cylinder 22 and variable pitch disk 21 constitute crank connecting link
Mechanism, the transform linear motion made when so that hydraulic cylinder 22 being stretched are the rotary motion of variable pitch disk 21, wind power generating set
Blade 23 rotated under the drive of variable pitch disk 21.
Although being only illustrated herein using two hydraulic cylinders as executing agency, practical application is not limited in
Variable pitch of one or more hydraulic cylinders for single blade can be set according to actual load and wheel hub space requirement in this.
Fig. 5 be embodiment according to the present invention by hydraulic motor 32 as executing agency to drive wind power generating set
The schematic diagram that blade 33 rotates.As shown in figure 5, being provided with three hydraulic motors 32 on variable pitch disk 31.When use hydraulic motor
When 32 conduct executing agency, the rotary motion of hydraulic motor 32 can be converted by gear, toothed belt or other transmission devices
For the rotary motion of blade 33, while the realization of blade 33 can also be directly driven using the good low-speed characteristic of hydraulic motor 32
Variable pitch movement.
Although being only illustrated herein using three hydraulic motors as executing agency, practical application simultaneously not only limits
One or more hydraulic motors can be set for single blade according to actual load and wheel hub space requirement in this
Variable pitch.
According to an embodiment of the invention, multiple groups gear, toothed belt or other biographies can also be arranged for each hydraulic motor
Dynamic device.Fig. 6 is another schematic diagram by hydraulic motor 41 as executing agency of embodiment according to the present invention.Reference Fig. 6,
Hydraulic motor 41 connects multiple transmission shafts 43 by power distributor 42, and the multiple transmission shaft 43 is separately connected multiple toothed belts
44, toothed belt 44 can drive the blade of wind power generating set to rotate.When hydraulic motor 41 is driven to rotate, toothed belt 44 is revolved
Turn, and then drives the blade rotation of wind power generating set.
According to the present invention, in order to improve the integrated level of fluid pressure pitch-controlled system, the present invention is quiet to above-described liquid
Buckling oar system has carried out modularized design.Fig. 7 is the knot of fluid pressure pitch-controlled system 2 according to another embodiment of the present invention
Structure schematic diagram.
As shown in fig. 7, fluid pressure pitch-controlled system 2 includes energy-storage module 210, transmission module 220 and control module 230.
Energy-storage module 210 includes electric energy-storage module 211 and energy storage module 212.Transmission module 220 includes executing agency 221.Control mould
Block 230 includes driver 231, motor 232, hydraulic pump 233 and valve block 234.With 1 class of fluid pressure pitch-controlled system shown in FIG. 1
Seemingly, various components can execute corresponding function.
Driver 231 is electrically connected to motor 232, and motor 232 is electrically connected to hydraulic pump 233.Electric energy-storage module 211 is electrically connected
To driver 231 to power to driver 231.Energy storage module 212 is connected to valve block 234 by oil circuit interface.Executing agency
221 are connected to valve block 234 by oil circuit interface, and valve block 234 is connected to hydraulic pump 233 by oil circuit interface.The also electricity of driver 231
It is connected to executing agency 221, to obtain feedback signal from executing agency 221.For example, driver 231 can be from executing agency 221
Receive the information such as movement position signal, the temperature signal of executing agency 221.Driver 231 is also connected electrically to valve block 234, with control
The opening and closing of valve block 234 processed.According to actual needs, oil circuit interface can be the hydraulic tubes such as hydraulic hose, high-pressure ball valve and connect
Mouthful, electric interfaces can be Harding's interface to reduce field adjustable, replacement and the workload of maintenance.
The fluid pressure pitch-controlled system 2 of embodiment according to the present invention can be directly integrated in the wheel of wind power generating set
On hub, therefore it can be omitted the fuel tank and rotary joint in the cabin of wind power generating set, to save installation space, production
With maintenance cost.
Compared with traditional valve control hydraulic system, fluid pressure pitch-controlled system according to the present invention, which has, preferably to be stablized
Property, the linearity and reliability, control efficiency are higher, due to can install according to actual needs multiple groups executing agency (hydraulic cylinder or
Hydraulic motor etc.), therefore, the fluid pressure pitch-controlled system is it is possible to prevente effectively from executing agency in traditional valve control hydraulic system
Limitation of the intensity (for example, intensity of gear and toothed belt) to pitch-controlled system.The fluid pressure pitch-controlled system can be flexible
With electric energy storage and hydraulic accumulation energy, wind power generating set safer and efficiently can be controlled by both energy storage modes, mentioned
The safety coefficient of high entire wind power generating set.
In addition, the modularized design of the fluid pressure pitch-controlled system of embodiment according to the present invention, so that fluid pressure becomes
Oar system internal structure is more compact, and simpler convenience is installed and replaced to interface.
Embodiment in above-described embodiment can be further combined or replace, and embodiment is only to of the invention
Preferred embodiment is described, and it is not intended to limit the concept and scope of the present invention, is not departing from design philosophy of the present invention
Under the premise of, the various changes and modifications that those skilled in the art make technical solution of the present invention belong to guarantor of the invention
Protect range.
Claims (11)
1. a kind of fluid pressure pitch-controlled system, which is characterized in that the fluid pressure pitch-controlled system includes energy-storage module, driving
Device, motor, hydraulic pump, valve block and executing agency, wherein
Energy-storage module is connected at least one of driver and valve block, to provide power；
Driver is connected to motor with driving motor and controls the operation of motor；
Motor is connected to hydraulic pump to drive hydraulic pump；
Valve block is connected to driver, hydraulic pump and executing agency, and driver control valve block opens or closes, and hydraulic pump passes through valve
Block conveys hydraulic oil to drive executing agency；
Executing agency is connected to variable pitch disk to drive variable pitch disc spins.
2. fluid pressure pitch-controlled system according to claim 1, which is characterized in that energy-storage module includes:
Electric energy accumulator is connected to driver to power to driver；Or/and
Accumulator is connected to valve block, and hydraulic pump selectively conveys hydraulic oil to accumulator by valve block, to store up in accumulator
Deposit energy.
3. fluid pressure pitch-controlled system according to claim 2, which is characterized in that valve block includes at least one reversal valve,
For controlling the direction of motion of executing agency；Or/and
Valve block includes the valve for making accumulator be connected with executing agency and be isolated.
4. fluid pressure pitch-controlled system according to claim 3, which is characterized in that when electric energy accumulator stops supplying to driver
When electric, driver sends the signal of instruction driver power down to the valve,
The valve is opened in response to the signal that receives so that accumulator is connected with executing agency, to utilize accumulation of energy
The energy of device storage drives executing agency, and then variable pitch disk is driven to execute feathering.
5. fluid pressure pitch-controlled system described in any one of -4 according to claim 1, which is characterized in that driver is based on motor
Output electric current, the revolving speed of hydraulic pump, executing agency movement position control the revolving speed and input current of motor, to control liquid
The flow and pressure of press pump.
6. fluid pressure pitch-controlled system according to claim 5, which is characterized in that executing agency includes one or more liquid
Pressure motor；Alternatively,
Executing agency includes one or more hydraulic cylinders.
7. fluid pressure pitch-controlled system according to claim 5, which is characterized in that hydraulic pump is quantitative hydraulic pump.
8. a kind of control method of fluid pressure pitch-controlled system, which is characterized in that the control method includes:
Power is provided to fluid pressure pitch-controlled system using the energy-storage module of fluid pressure pitch-controlled system；
The motor of fluid pressure pitch-controlled system is driven using the driver of fluid pressure pitch-controlled system and controls the operation of motor；
It is controlled using the hydraulic pump of motor driven liquid static pressure pitch-controlled system, and only by the operation of driver control motor
The flow and pressure of hydraulic pump；
Using the executing agency of hydraulic pump driving fluid pressure pitch-controlled system to drive variable pitch disc spins.
9. control method according to claim 8, which is characterized in that the step of driving executing agency using hydraulic pump is wrapped
It includes: hydraulic oil being conveyed to drive executing agency, also, the control by the valve block of fluid pressure pitch-controlled system using hydraulic pump
Method further include: using opening or closing for valve block described in driver control, to control the direction of motion of executing agency.
10. control method according to claim 9, which is characterized in that the step of controlling the operation of motor includes: driver
The revolving speed and input current of motor are controlled based on the movement position of the output electric current of motor, the revolving speed of hydraulic pump, executing agency,
To control the flow and pressure of hydraulic pump.
11. control method according to claim 9, which is characterized in that the control method further include: when in energy-storage module
Electric energy accumulator when stopping powering to driver, driver sends the signal of instruction driver power down to valve block, and the valve block is rung
Ying Yu receives the signal and accumulator and executing agency in energy-storage module is made to be connected, to utilize the energy of accumulator storage
Amount driving executing agency, and then variable pitch disk is driven to execute feathering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710966407.3A CN109667714B (en) | 2017-10-17 | 2017-10-17 | Hydrostatic variable-pitch system and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710966407.3A CN109667714B (en) | 2017-10-17 | 2017-10-17 | Hydrostatic variable-pitch system and control method thereof |
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| CN109667714A true CN109667714A (en) | 2019-04-23 |
| CN109667714B CN109667714B (en) | 2020-01-31 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113031527A (en) * | 2019-12-25 | 2021-06-25 | 新疆金风科技股份有限公司 | Multi-axis synchronous variable pitch control method, device and system |
| CN113027676A (en) * | 2019-12-25 | 2021-06-25 | 新疆金风科技股份有限公司 | Hydraulic variable pitch control method and device of wind generating set |
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|---|---|---|---|---|
| DE20017994U1 (en) * | 2000-10-19 | 2001-02-08 | Steven Joachim | Hybrid pitch drive for wind turbines |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113031527A (en) * | 2019-12-25 | 2021-06-25 | 新疆金风科技股份有限公司 | Multi-axis synchronous variable pitch control method, device and system |
| CN113027676A (en) * | 2019-12-25 | 2021-06-25 | 新疆金风科技股份有限公司 | Hydraulic variable pitch control method and device of wind generating set |
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| CN109667714B (en) | 2020-01-31 |
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