CN102859185A - Rotor blade pitch adjustment device - Google Patents
Rotor blade pitch adjustment device Download PDFInfo
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- CN102859185A CN102859185A CN2011800222938A CN201180022293A CN102859185A CN 102859185 A CN102859185 A CN 102859185A CN 2011800222938 A CN2011800222938 A CN 2011800222938A CN 201180022293 A CN201180022293 A CN 201180022293A CN 102859185 A CN102859185 A CN 102859185A
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- 239000012530 fluid Substances 0.000 claims description 26
- 230000007246 mechanism Effects 0.000 claims description 20
- 239000003990 capacitor Substances 0.000 claims description 2
- 230000009467 reduction Effects 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract 2
- 230000001276 controlling effect Effects 0.000 description 23
- 230000005611 electricity Effects 0.000 description 17
- 230000001105 regulatory effect Effects 0.000 description 9
- 230000033001 locomotion Effects 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000002706 hydrostatic effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 206010008190 Cerebrovascular accident Diseases 0.000 description 1
- 208000006011 Stroke Diseases 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
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- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
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- 230000001960 triggered effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/022—Adjusting aerodynamic properties of the blades
- F03D7/0224—Adjusting blade pitch
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D7/00—Rotors with blades adjustable in operation; Control thereof
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/0264—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor for stopping; controlling in emergency situations
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2260/00—Function
- F05B2260/40—Transmission of power
- F05B2260/406—Transmission of power through hydraulic systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2260/00—Function
- F05B2260/70—Adjusting of angle of incidence or attack of rotating blades
- F05B2260/76—Adjusting of angle of incidence or attack of rotating blades the adjusting mechanism using auxiliary power sources
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2260/00—Function
- F05B2260/70—Adjusting of angle of incidence or attack of rotating blades
- F05B2260/79—Bearing, support or actuation arrangements therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2270/00—Control
- F05B2270/10—Purpose of the control system
- F05B2270/107—Purpose of the control system to cope with emergencies
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2270/00—Control
- F05B2270/30—Control parameters, e.g. input parameters
- F05B2270/328—Blade pitch angle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2270/00—Control
- F05B2270/60—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)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Wind Motors (AREA)
Abstract
A rotor blade pitch adjustment device for a wind power installation is disclosed, having a motor/pump unit whose rotation speed and direction are variable and which is connected for fluid-flow purposes to a hydraulic actuator via a hydraulic open-loop/closed-loop control system. The actuator is mechanically coupled to at least one rotor blade of the wind power installation in order to rotate the rotor blade about its longitudinal axis. According to the invention, an electrical control circuit, which comprises an emergency power supply device, is provided for operation of the motor.
Description
The present invention relates to a kind of rotor blade controlling device of the wind energy facility as described in the preamble according to claim 1.
Wind energy facility rotates by the lift of the wind on the rotor blade, and wherein, the power of wind increases with the cube of wind speed.This wind energy facility for the modern times means, rotor power (producing by lift) is greater than rated power from the wind speed of about 9m/s usually, so wind energy facility must limit its output power, to avoid especially the material damage at the rotor blade place of sensitivity.
Basically two kinds of main design proposals that have in the prior art Power Limitation:
A kind of possibility is in principle, comes power-limiting output by the separation bubble of introducing at rotor blade targetedly surpassing under certain wind conditions.This so-called airflow breakaway regulating system (Stall-Regelung) is the most simply and also to be the most ancient regulating system and based on so constructing rotor blade profile (being its arch structure), so that (under constant rotating speed) forms turbulent flow (turbulent flow) at rotor blade under certain, wind speed of can analysis mode determining, lift automatically reduces and therefore the power of equipment can be remained on the rated power thus.But the problem of this regulative mode is, rotor blade profile be not keep identical but along with working time climate impact change like rain, ice/snow, loss etc.Therefore airflow breakaway-wind speed can not accurately be pre-determined, thereby the design of rotor blade profile (blade profile) is difficult.For this reason, the limit of airflow breakaway is so arranged, and does not namely reach rated power, so that a kind of safety buffer zone to be provided, but thus the power income of equipment and thus deterioration of efficiency.
The another kind of possibility of Power Limitation relates to (on one's own initiative) rotary rotor blade (regulate pitch (Pitch)), thus in the wind energy facility of pitch regulated by guaranteed the adjusting to power by means of so-called pitch regulated system rotary rotor blade.Utilized herein following hydromechanical relation:
In the common range of operation of wind energy facility, the power factor of rotor blade increases along with the angle of attack (can compare with the wing of aircraft).This means that the low angle of attack produces low lift and therefore produces lower-wattage.Utilize this principle, make power adapt to wind speed by rotational speed blade (adjusting pitch) now.
-in very weak wind (0-4m/s) situation, conventional wind energy facility is not worked, and can not produce enough lift at rotor blade because the inflow velocity of wind is too little.Rotor blade is rotated a so-called downwind position (the Fahnenstellung) (angle of pitch (inclination angle)=90 ° in this case; The angle of attack=0 °), there is not lift to produce in this downwind position.
-in gentle breeze (4-13m/s) situation, wind energy facility rotates and produces available power, can not reach the rated power of equipment but its apoplexy is too weak.The angle of pitch becomes minimum (angle of pitch=0 °) and the angle of attack is maximum thus in this case, in order to convert wind energy to mechanical energy as much as possible.
-in high wind (13-25m/s) situation, the rated power of equipment can be exceeded.In order to stop this situation, equipment be that is to say that by " adjusting pitch " rotor blade is back rotated towards downwind position continuously or step by step this moment.
-in storm wind (from 25m/s) situation, damage dangerous too high, therefore this moment for security reasons rotor blade be rotated in principle downwind position.
Verified at this, only a rotor blade is regulated pitch and just be enough to make equipment to be matched with the wind speed of change generally having in the conventional wind rotor situation of three rotor blades.In passing, also be applicable to theme of the present invention according to this working method described above.
By prior art, for example according to the pitch regulated system (blade pitgh regulating system (Pitch-System)) of the known a kind of the type of WO2009/064264, its by the pivotal position of a rotor blade that is used for control/regulate wind energy facility electronic-hydraulic type actuator forms.Actuator has the electric notor that can change rotating speed and direction according to electric current [strength and polarity, and this electric notor is via the oil hydraulic pump of motor drive shaft driving as the primary pressure medium source.In the case, pump is transported to for example through underground hydraulic fluid that form is the oil hydraulic motor of servocylinder, and it (is connected with electric notor to be arranged in the rotor hub and with the rotor blade effect with pump and is connected, in order to make rotor blade center on the longitudinal axis rotation.In underground, be combined with the accumulator form another, the second pressure medium source, it supplies to the hydraulic fluid of pressure-loaded in the underground in the situation that the primary pressure medium source breaks down, so that (reliably) that rotor blade turned to thus it in the scope of urgent operation is according to previously defined downwind position.
In addition, EP1739807A2 discloses a kind of servo drive of electricity, and it is used for rotating at least one rotor blade of the wind energy facility with urgent power supply, and urgent power supply is connected on the electrical switching circuit of servo drive.Urgent power supply comprises accumulator at this, this accumulator voltage that provides support, and this supports voltage is present can be switched on when being lower than support voltage below 80% and when the switching circuit voltage drop for the rated operational voltage of electrical switching circuit.
The rotor blade controlling device that the purpose of this invention is to provide a kind of wind energy facility, it realizes the kinology performance of simplification under the suitable blade adjustments advantage of system utilization electricity and hydraulic pressure.
The rotor blade controlling device of the wind energy facility of the feature of this purpose by having claim 1 realizes.Favourable embodiment of the present invention is the theme of dependent claims.
Therefore, for the purpose that realizes proposing, advise a kind of rotor blade controlling device of wind energy facility, that it has a direction-agile and the best motor-pump of variable speed-unit, it is communicated with (fluid is connected) through the control mechanism (open-loop control system) of hydraulic pressure/controlling mechanism (closed loop control system) with actuator's fluid of hydraulic pressure, at least one rotor blade of this actuator and wind energy facility mechanically is coupled, so that the longitudinal axis that makes rotor blade center on it rotates.According to one aspect of the present invention, the electric control circuit of motor-pump-unit is furnished with urgent power supply, urgent power supply externally under the power network failure conditions at least to the control loop supply of electrical energy.By this way, for urgent operation, also can keep at least repertoire control mechanism, that comprise the valve of middle (insertion) that connects, electromagnetic mode operation of hydraulic pressure.Therefore the control mechanism of hydraulic pressure is not to be designed to (currentless) urgent operation in essential mode.
Advantageously, urgent power supply is designed to storage battery or capacitor, can be switched on the electric control circuit in its predetermined lower voltage situation in electric control circuit.This storage battery life-span now is very long and also have high energy density under small size, and it is enough to implement once promptly operation.
According to another aspect of the present invention, stipulate that urgent power supply can be switched on for to electric control circuit and motor-pump-unit energy supply.Therefore, if the Power supply of motor is considered to interrupt, for urgent operation, can keep this Power supply by urgent power supply so at least.
Another aspect of the present invention relates to the control mechanism/controlling mechanism of hydraulic pressure, and it has the urgent running gear of hydraulic pressure according to the present invention, is used for supplying with to the actuator of hydraulic pressure in motor-pump-element failure or power reduction situation the pressure energy of hydraulic pressure.Because if the drive motor of the electricity of oil hydraulic pump has fault, the urgent power supply of electricity is invalid so.At least can guarantee that in this case an auxiliary hydraulic pressure pressure is used for urgent operation (being used at least one rotor blade is turned to downwind position).This dual fail-safe has great advantage with respect to prior art.As already implies, as the out of order situation of electric notor tool of final tache of the Quality Initiative of electricity, only the insurance on electric is inoperative for for example.It is upper and therefore act on the last link of the Quality Initiative of hydraulic pressure that the accumulator of hydraulic pressure directly acts on the servo drive (actuator) of hydraulic pressure.Accumulator can lose on-load pressure along with the time during this period.Therefore the combination of two safety systems provides the protection of the maximum in the device fails situation.
It should still be noted that at last another aspect of the present invention, wherein the rotor blade controlling device also dispose direction-agile and the best motor-pump of variable speed-unit, it is communicated with actuator's fluid of hydraulic pressure via the control mechanism/controlling mechanism of hydraulic pressure.Actuator and at least one rotor blade mechanically are coupled, so that the pitch of regulating rotary blades (spacing).In this regulation, actuator design becomes multicell structural type pressure cylinder (preferably Three pressures chamber), wherein, a pressure chamber only is used for being communicated with the accumulator fluid when urgent operation, can load with hydraulic fluid when on the contrary, other pressure chamber only is used for normal adjusting/controlling run at pressure pump.Like this, can make urgent operation-pressure chamber's coupling and therefore optimize urgent operational system about pressure store and the storage volume of accumulator, and unnecessary correspondingly adaptive remaining hydraulic system.Should be noted that herein; this last described aspect of the present invention can with the aspect of enumerating previously mutually independently in or also can be applied in combination in the rotor blade controlling device with it, and therefore also should with the dividually prescription protection of remaining aspect.
It is following that present invention will be described in detail with reference to the accompanying according to preferred embodiment.
Fig. 1 has shown a block diagram about the rotor blade controlling device of wind energy facility, is used for illustrating some combinatory possibilities of each separate part of electric and hydrostatic drive unit,
Fig. 2 has shown the rotor blade controlling device according to the wind energy facility of the first preferred embodiment of the present invention,
Fig. 3 has shown the rotor blade controlling device according to the wind energy facility of the second preferred embodiment of the present invention, and
Fig. 4 has shown the rotor blade controlling device according to the wind energy facility of the 3rd preferred embodiment of the present invention.
In Fig. 1, schematically illustrated the rotor blade controlling device according to wind energy facility of the present invention, it has hydraulic system 1, this hydraulic system preferably by direction-agile and preferably motor-the pump of variable speed-unit 2 form, this motor-pump-unit is via control mechanism/controlling mechanism (open/close control system) 4 of hydraulic pressure and actuator's 6 fluids connections (fluid is connected) of hydraulic pressure.Actuator 6 mechanically is coupled with at least one (not illustrating) rotor blade of wind energy facility, so that rotor blade rotates around its longitudinal axis.According to the present invention, be provided with the electric control circuit 12 that comprises urgent power supply 10 in order to move motor 8.To this alternatively or additionally, hydraulic system 1 also can dispose urgent running gear (urgent storage) 14.Therefore, has at least one according to rotor blade controlling device of the present invention, best two safety systems, at least one rotor blade at failure condition apparatus for lower wind equipment can be rotated downwind position (minimum drag leaf position) in the scope of urgent operation whereby.
On the one hand, the urgent storage 10 of electricity is set, it in the malfunctioning situation of primary power network to the drive unit of electricity (electric control circuit 12 and motor 8 in case of necessity, they form the servo drive of electricity together) supply of electrical energy, this electric energy is for being enough at least one urgent operation defined above.
On the other hand, selectively, it also can additionally be hydraulic system 1 (pump 16, controlling mechanism/the control mechanism 4 of hydraulic pressure, actuator 6, they form hydrostatic driving mechanism together) equipment hydraulic pressure urgent storage 14, the urgent storage of this hydraulic pressure is inputted for example streamed hydraulic energy of hydraulic fluid to hydraulic system 1.The urgent storage 14 of this hydraulic pressure is significant when the motor 8 in the tail end of the chain of electricity is interfered and therefore the urgent supply of electricity is invalid for example.
Figure 2 illustrates the first embodiment of the present invention, foregoing basic principle is applied among this embodiment in technical mode.
Therefore a rotor blade that does not further illustrate of wind energy facility is rotated by the longitudinal axis around it by the cylinder (run-in synchronism cylinder) 6 that evenly turns round, and this cylinder that evenly turns round also is that leverage and this rotor blade that does not illustrate is coupled via one.In order to handle cylinder 6, the pressure pump 16 in parallel with cylinder 6 is set, that is to say that their two joints are connected to the corresponding 6A of pressure chamber of cylinder 6, on the 6B.Pressure pump 16 in the case can be on both direction delivering hydraulic fluid, wherein, hydraulic fluid only is pumped into respectively the 6A of pressure chamber of cylinder, among the 6B.
(reverse) selector valve 18 is connected in pressure pump-bypass line 20 in parallel with pressure pump 16, and the equalizing reservoir 22 that is used for additional (sucking again) hydraulic fluid is connected to pressure pump-bypass line 20 through selector valve 18.
One for example form be that the second pressure medium source of accumulator 14 is connected on one of them 6B of pressure chamber of cylinder 6, this pressure chamber is in order to be loaded pressure on the downwind position that rotor blade is turned to it, described second pressure medium source can be via control valve 24, and preferably (opening) 2/2-directional control valve of Electromagnetic Control is communicated with the 6B of this pressure chamber fluid.The 6A of pressure chamber on 6B opposite, pressure chamber has the additional entrance 26 that leads to equalizing reservoir/holding vessel 22, wherein, in this entrance 26, the centre is connecting distributing valve 28, the 2/2-directional control valve of electromagnetic opening preferably, it is pre-tensioner on a locked position of coupler by spring.
The working method of rotor blade controlling device shown in Figure 1 can be described below:
In service normal (glitch-free), whole described directional control valves are energized stream, therefore are on the locked position of coupler at the directional control valve 24 between accumulator 24 and the 6B of pressure chamber and the directional control valve 28 between holding vessel 22 and the 6A of pressure chamber.In the case, pressure pump 16 is so operated via rotating speed and the variable electric notor 8 of sense of rotation, so that at least one rotor blade obtains certain angle of pitch according to wind-force intensity, is no more than the rated power of equipment at this angle lower rotor part power.Should be noted that herein the replacement scheme as the electric notor 8 of variable speed, pressure pump 16 also can be implemented in the variable mode of discharge capacity.For accumulator 14 is loaded (la), must from oil hydraulic circuit, take out fluid.For this purpose, selector valve 18 is communicated with holding vessel 22 fluids via the aspiration of outside, as this has illustrated in front, thereby pressure pump 16 can be transported to fluid the accumulator 14 from holding vessel is additional, until accumulator contains predetermined on-load pressure.
In the situation of breaking down, for example the decline of the transmission power of the supply decline of the normal voltage/electric current of circuit and/or pump 16 and/or the hydraulic pressure in the controlling mechanism/control mechanism 4 of hydraulic pressure are reduced to and are lower than the value of respectively predesignating, urgent operation is triggered, the rotor blade controlling device is operated and carries out emergency operation thus, in order to rotor blade is adjusted to downwind position.
In this case, the urgent power supply of electricity is connected on the switching circuit of electricity, and wherein, electric control circuit 12 is the circuit 4 of control hydraulic pressure so, so that cylinder 6 is in order to turn to rotor blade downwind position and to be loaded pressure.If electric notor 8 is interfered, that is to say that the access of the urgent power supply of electricity is without any effect, the urgent running gear of hydraulic pressure is activated so.Therefore the electric current that leads in this case whole directional control valve 24,28 is interrupted, thereby these directional control valves are connected on the open position by corresponding initial tension of spring.Correspondingly, accumulator 14 discharges and set up corresponding operation pressure in cylinder 6 to the controlling mechanism 4 of hydraulic pressure via the directional control valve 24 that is connected to the upstream and is used for rotor blade is turned to downwind position.Because pump 16 stops, therefore can not discharging via pump 16 from the hydraulic fluid of chamber 6A.But chamber 6A directly leads to the entrance of holding vessel 22 via directional control valve 28 in this (promptly) situation, thereby hydraulic fluid was pressed into the holding vessel 22 from chamber 6A between the urgent moving period of cylinder.
Fig. 3 has shown the second preferred embodiment of the present invention, and it is in principle corresponding to the first embodiment described above, but cancellation arranges the sentinel plant of hydraulic pressure.The urgent power supply of electricity only is set in this case, is used for electric notor 8 galvanizations in order to move hydrostatic driving mechanism.Because accumulator is not set in a second embodiment, this accumulator should cause (without pump ground) operation actuator 6, the outside entrance of the 2/2-directional control valve that therefore in the middle of also not needing between 6A of pressure chamber of actuator 6 and the holding vessel 22 to have, connects, such as this outside entrance illustrated among the first embodiment.
Also according to Fig. 4 the third embodiment of the present invention is described at last, it still wherein uses a multicell cylinder 6 in principle corresponding to the first embodiment of the present invention, and preferably three Room cylinders are used for rotating at least one rotor blade.
In this case, for urgent operation, accumulator 14 is connected on the only chamber 6B via the directional control valve 24 of can electromagnetic mode opening, but this chamber is in this case just in service rotor blade is turned to downwind position and is loaded pressure urgent.For this purpose, connect pressure relief pipeline or entrance pipe 26 at (urgent operation-) 6B of pressure chamber, it directly leads to holding vessel 22 and to have connected also be the 2/2-directional control valve 28 that can open with electromagnetic mode in the centre therein.Directional control valve 28 is energized stream and therefore is shown in an open position under normal operation, thereby piston can be extruded hydraulic fluid or again suction via entrance pipe 26 from (urgent operation-) 6B of pressure chamber during axial motion.
Two 6A of pressure chamber that are positioned at 6B opposite, pressure chamber of multicell cylinder, 6C is connected on two joints of pump 16, so the cylinder piston according to the throughput direction of pump 16 normal in service can to-and-fro motion.These two 6A of pressure chamber and 6C directly interconnect through the short circuit pipeline in addition, are connected in this short circuit pipeline by the centre with the 2/2-directional control valve 30 that electromagnetic mode is opened.At last, with respect to pump 16 pressure pump bypass line 20 is set, (reverse) selector valve 18 that is communicated with holding vessel 22 fluids is inserted in this pressure pump bypass line.
Working method explanation about the 3rd preferred embodiment is like this:
As previously mentioned, pump 16 is communicated with chamber 6A and 6C fluid, in order to make the cylinder piston movement under normal operation.At normal operation period, directional control valve 24,28 and 30 is energized.Therefore valve 28 is opened and valve 24 and 30 is closed.That is to say that accumulator 14 separates with chamber 6B and exists between holding vessel 22 and chamber 6B via pipeline 26 and is communicated with, and Shi ﹠amp; A and ﹠amp; C is separated.Therefore during the piston proper motion, corresponding fluid displacement is being pumped between two chamber 6A and the 6C and simultaneously exchange between chamber 6B and holding vessel 22.
In case of emergency (for example these valves no longer are energized stream in the current interruptions situation), storage 14 is connected with chamber 6B, and chamber 6A and 6C are via valve 30 mutual short circuits.The pressure that acts on the 6B of chamber by reservoir pressure pushes (downwind position) with piston left according to Fig. 4.In the case, oil capacity is squeezed chamber 6C from chamber 6A.Because the difference in volume (capacity difference) that possible Area Ratio produces compensates by selector valve 18.
The advantage of this multicell cylinder is basically, by suitably selecting interconnecting and the position of storage of Area Ratio, cylinder chamber, can produce advantage active, strong and on structure space at piston area.
The reference character table
Hydraulic system 1
Motor-pump-unit 2
The control mechanism 4 of hydraulic pressure
Actuator/cylinder 6
Electric notor 8
Urgent running gear/accumulator 14
Pressure pump-bypass line 20
Entrance (pipeline) 26
2/2-directional control valve 28
The distributing valve (switching valve) 30 that is used for the 6C of pressure chamber.
Claims (9)
1. the rotor blade controlling device of wind energy facility, motor-pump-unit (2) with direction-agile, described motor-pump-unit is communicated with actuator (6) fluid of hydraulic pressure via the control mechanism/controlling mechanism (4) of hydraulic pressure, at least one rotor blade of the actuator of described hydraulic pressure and wind energy facility mechanically is coupled, be used for making described rotor blade to rotate around its longitudinal axis, it is characterized in that the electric control circuit that comprises urgent power supply (10) (12) of described motor-pump-unit (2).
2. according to rotor blade controlling device claimed in claim 1, it is characterized in that, described urgent power supply (10) is storage battery or capacitor, can be pulled on the described electric control circuit in its predefined lower voltage situation in described electric control circuit (12).
3. according to rotor blade controlling device claimed in claim 2, it is characterized in that described urgent power supply (10) is arranged for the Power supply of described electric control circuit (12) and described motor-pump-unit (2).
4. according to claim 1 or 2 described rotor blade controlling devices, the urgent running gear (14) that it is characterized in that hydraulic pressure, it is used for supplying with to the actuator (6) of described hydraulic pressure the pressure energy of hydraulic pressure in described motor-pump-unit (2) inefficacy or power reduction situation.
5. according to each described rotor blade controlling device in the claim 1 to 4, it is characterized in that the actuator of described hydraulic pressure (6) is the piston-cylinder unit of hydraulic pressure.
6. according to each described rotor blade controlling device in the aforementioned claim 1 to 5, it is characterized in that described motor-pump-unit (2) can be controlled in the mode of variable speed by described electric control circuit (12).
7. according to each described rotor blade controlling device in the claim 1 to 6, it is characterized in that the piston-cylinder unit of described hydraulic pressure is the multicell cylinder, preferably three cell structure patterns.
8. according to rotor blade controlling device claimed in claim 7, it is characterized in that, in order promptly in service at least one rotor blade to be turned to its downwind position, only one of them chamber (6B) can be used for from the preferably hydraulic fluid loading of accumulator (14) of urgent running gear (14), on the contrary, in order under running well, described at least one rotor blade to be rotated out and to rotate towards its downwind position from its downwind position, at least two other chambers (6A, 6C) can be loaded with hydraulic fluid.
9. according to rotor blade controlling device claimed in claim 8, it is characterized in that, the urgent running gear (14) of described hydraulic pressure is via control valve, but preferably the 2/2-directional control valve (24) opened of electromagnetic ground is connected on the described only chamber (6B).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102010019444A DE102010019444A1 (en) | 2010-05-05 | 2010-05-05 | rotor blade |
| DE102010019444.1 | 2010-05-05 | ||
| PCT/DE2011/000374 WO2011137885A2 (en) | 2010-05-05 | 2011-04-08 | Rotor blade pitch adjustment device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102859185A true CN102859185A (en) | 2013-01-02 |
Family
ID=44629010
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011800222938A Pending CN102859185A (en) | 2010-05-05 | 2011-04-08 | Rotor blade pitch adjustment device |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20130243624A1 (en) |
| EP (1) | EP2567089A2 (en) |
| KR (1) | KR20130086130A (en) |
| CN (1) | CN102859185A (en) |
| DE (1) | DE102010019444A1 (en) |
| WO (1) | WO2011137885A2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016183942A1 (en) * | 2015-05-16 | 2016-11-24 | 张效新 | Linear rack-based rotor blade adjustment mechanism |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2703644B1 (en) * | 2012-08-27 | 2016-08-03 | Alstom Wind, S.L.U. | Angular positioning system for a wind turbine |
| JP6358993B2 (en) * | 2015-09-11 | 2018-07-18 | 三菱重工業株式会社 | Wind turbine generator and method for inserting wind turbine generator |
| EP3362683B1 (en) | 2015-10-14 | 2020-04-22 | Vestas Wind Systems A/S | Method for controlling hydraulic pitch force system |
| DE102020002452B3 (en) * | 2020-04-23 | 2021-08-12 | Siemens Gamesa Renewable Energy Service Gmbh | Pitch drive for a rotor blade of a wind turbine and method for operating a pitch drive |
| DE102020004036A1 (en) | 2020-07-03 | 2022-01-05 | Siemens Gamesa Renewable Energy Service Gmbh | Wind energy plant and method for operating a wind energy plant |
| US11746748B2 (en) | 2020-07-03 | 2023-09-05 | Siemens Gamesa Renewable Energy Service Gmbh | Wind energy installation and a method of operating a wind energy installation |
| KR102556369B1 (en) * | 2021-12-15 | 2023-07-18 | 주식회사 금풍 | Wind power generation having power-off pitch control structure |
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2010
- 2010-05-05 DE DE102010019444A patent/DE102010019444A1/en not_active Withdrawn
-
2011
- 2011-04-08 WO PCT/DE2011/000374 patent/WO2011137885A2/en active Application Filing
- 2011-04-08 KR KR1020127028852A patent/KR20130086130A/en not_active Application Discontinuation
- 2011-04-08 US US13/695,891 patent/US20130243624A1/en not_active Abandoned
- 2011-04-08 CN CN2011800222938A patent/CN102859185A/en active Pending
- 2011-04-08 EP EP11735969A patent/EP2567089A2/en not_active Withdrawn
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|---|---|---|---|---|
| EP1748183A2 (en) * | 2005-07-28 | 2007-01-31 | W2E Wind to Energy GmbH | Electrical device for wind turbine rotor blade pitch adjustment |
| CN101415938A (en) * | 2006-02-09 | 2009-04-22 | 水力发电有限公司 | Device for controlling the blades of a wind turbine |
| US20070205602A1 (en) * | 2006-03-06 | 2007-09-06 | General Electric Company | Methods and apparatus for controlling rotational speed of a rotor |
| CN101583793A (en) * | 2006-10-11 | 2009-11-18 | 歌美飒创新技术公司 | System for rotating a wind turbine blade |
| CN201092931Y (en) * | 2007-06-04 | 2008-07-30 | 无锡宝南机器制造有限公司 | Independent hydraulic pressure oar-changing mechanism for wind generator |
| JP2008302787A (en) * | 2007-06-07 | 2008-12-18 | Tadano Ltd | Hydraulic circuit for track traveling of road railer |
| CN201247964Y (en) * | 2009-01-08 | 2009-05-27 | 北京能高自动化技术有限公司 | Power supply for variable pitch system |
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| WO2016183942A1 (en) * | 2015-05-16 | 2016-11-24 | 张效新 | Linear rack-based rotor blade adjustment mechanism |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2567089A2 (en) | 2013-03-13 |
| DE102010019444A1 (en) | 2011-11-10 |
| US20130243624A1 (en) | 2013-09-19 |
| WO2011137885A3 (en) | 2012-04-26 |
| WO2011137885A2 (en) | 2011-11-10 |
| KR20130086130A (en) | 2013-07-31 |
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Application publication date: 20130102 |