CN201092931Y - Independent hydraulic pressure oar-changing mechanism for wind generator - Google Patents
Independent hydraulic pressure oar-changing mechanism for wind generator Download PDFInfo
- Publication number
- CN201092931Y CN201092931Y CNU2007200392268U CN200720039226U CN201092931Y CN 201092931 Y CN201092931 Y CN 201092931Y CN U2007200392268 U CNU2007200392268 U CN U2007200392268U CN 200720039226 U CN200720039226 U CN 200720039226U CN 201092931 Y CN201092931 Y CN 201092931Y
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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
Abstract
The utility model relates to a wind power generation system and in particular relates to an independent hydraulic oar changing mechanism of a wind turbine. According to the technical scheme which is provided by the utility model, three revolving supports are installed on a wheel boss, an inner pressure plate is rotationally connected in each revolving support respectively, and each inner pressure plate is respectively and fixedly installed on the bottom of each oar blade. The independent hydraulic oar changing mechanism is characterized in that three oil cylinder seats which are corresponded with the revolving supports are respectively installed on the wheel boss, each oil cylinder is respectively installed on each oil cylinder seat, the outer end of a piston rod of each oil cylinder is respectively hinged with an eccentric block which is installed on a corresponding inner pressure plate, and thereby when one oar blade is failed, other two oar blades still can work normally, which increases the safety of the system.
Description
Technical field
The utility model relates to wind-power generating system, specifically a kind of independent hydraulically controlled blade pitch device of wind-driven generator.
Background technique
Variable pitch controlling mechanism is normally unified control by electro-hydraulic proportional control system to 3 blades of wind-driven generator, and promptly the blade pitch angle changes consistent.But since whole wind wheel sweep and face on wind speed inhomogeneous, can produce the fluctuation of blade moment of torsion thus and have influence on the mechanical stress and the fatigue life thereof of wind-driven generator driving mechanism.Obviously it is more reasonable 3 blades to be controlled separately.
Domestic traditional wind generating set pitch control all adopts the mode of connecting rod apart from actuator, hydraulic station and hydraulic jack are placed in the cabin, promote 3 blade rotations synchronously by a cover crank linkage mechanism, the displacement power of this scheme is limited, and can not independently control blade, can not satisfy the requirement of MW class wind turbine group.
Summary of the invention
The purpose of this utility model is to design a kind of independent hydraulically controlled blade pitch device of wind-driven generator, Hydrauservo System drives because each blade of wind-driven generator all overlaps independently by one, therefore, when a blade breaks down, other two blades still can proper functioning, has increased the Security of system.
The technological scheme that provides according to the utility model, 3 revolutions are installed on wheel hub to be supported, inner clip plate is rotationally connected respectively in each revolution is supported, and, every inner clip plate is fixedly installed in the bottom of blade separately respectively, it is characterized in that: on wheel hub, install respectively and 3 corresponding oil cylinder seats of revolution support, an oil cylinder be installed respectively on each oil cylinder seat, the outer end of the piston rod of each oil cylinder respectively be installed on corresponding inner clip plate on eccentric mass hinged.
Oil cylinder is connected with hydraulic system; In described hydraulic system, the A mouth of oil cylinder utilizes oil pipe to link to each other with solenoid directional control valve DT1 and Proportional valve, and the B mouth of oil cylinder utilizes oil pipe, solenoid directional control valve DT3 and equilibrium valve to link to each other with oil outlet T; Urgent feathering accumulator utilizes oil pipe to link to each other with Proportional valve with oil outlet T respectively with throttle valve, utilizes oil pipe, throttle valve, solenoid directional control valve DT2, one-way valve to link to each other with the A mouth of oil cylinder again; Proportional valve utilizes solenoid directional control valve DT4 to link to each other with oil inlet P with one-way valve, utilizes oil pipe, solenoid directional control valve DT4, one-way valve, solenoid directional control valve DT2 to link to each other with the A mouth of oil cylinder again; System's accumulator valve utilizes oil pipe to link to each other respectively with oil outlet T with Proportional valve, utilizes oil pipe to link to each other with the B mouth of oil cylinder with equilibrium valve, solenoid directional control valve DT3 again.
The pitch-controlled wind-driven generator group is exactly that the pitch angle of wind power generator oar blade can change.During unit starting, obtain enough detent torques by feather; And wind speed is when too high, by the output power of feather restriction generator.
Because the utility model adopts independent hydraulically controlled change oar technology, 3 blades are controlled separately, not only can make the wind power generating set output power more steady, and can reduce blade beating vibration greatly, and then reduce to act on the fluctuation of load on wind wheel, transmission shaft, the gear-box.Because the variable-pitch control system of this unit has adopted hydraulic servo technology and hydraulic differential technology, to the control accuracy of 3 blades up to ± 0.1 ° and the dynamic response sensitivity of system actuator up to 100ms; In addition, all be equipped with a safe accumulator in the hydraulic control circuit of each blade, no matter run into what fortuitous event and can both make 3 rapid safe featherings of blade, security of system height.
Description of drawings
Fig. 1 is user mode figure of the present utility model.
Fig. 2 is a hydraulic scheme.
Fluid circulation route when Fig. 3 increases for the blade pitch angle is as figure.
Fluid circulation route when Fig. 4 reduces for the blade pitch angle is as figure.
Fluid circulation route when Fig. 5 breaks down for unit is as figure.
Embodiment
Among Fig. 1,1, wheel hub, 2, eccentric mass, 3, piston rod, 4 is blade, and 5 support for revolution, and 17 is oil cylinder, and 7 is oil cylinder seat, and 8 is the valve piece, and 9 is inner clip plate.
As shown in Figure 1: 3 revolutions that are installed on the wheel hub 1 support 5, support the inner clip plate 9 that is rotationally connected respectively in 5 in each revolution, and, every inner clip plate 9 is fixedly installed in the bottom of blade 4 separately respectively, 3 oil cylinder seats 7 are installed respectively on wheel hub 1, an oil cylinder 17 is installed respectively on each oil cylinder seat 7, the outer end of the piston rod 3 of each oil cylinder 17 respectively be installed on corresponding inner clip plate 9 on eccentric mass 2 hinged.
As shown in Figure 2: oil cylinder 17 is connected with hydraulic system; In described hydraulic system, the A mouth of oil cylinder 17 utilizes oil pipe to link to each other with solenoid directional control valve DT1 and Proportional valve 20, and the B mouth of oil cylinder 17 utilizes oil pipe, solenoid directional control valve DT3 and equilibrium valve 13 to link to each other with oil outlet T; Urgent feathering accumulator 11 utilizes oil pipe to link to each other with Proportional valve 20 with oil outlet T respectively with throttle valve 22, utilizes oil pipe, throttle valve 22, solenoid directional control valve DT2, one-way valve to link to each other with the A mouth of oil cylinder 17 again; Proportional valve 20 utilizes solenoid directional control valve DT4 to link to each other with oil inlet P with one-way valve, utilizes oil pipe, solenoid directional control valve DT4, one-way valve, solenoid directional control valve DT2 to link to each other with the A mouth of oil cylinder 17 again; System's accumulator valve 12 utilizes oil pipe to link to each other respectively with oil outlet T with Proportional valve 20, utilizes oil pipe to link to each other with the B mouth of oil cylinder 17 with equilibrium valve 13, solenoid directional control valve DT3 again.
Feather actuator has adopted the mode of independent hydraulically controlled change oar, sees Fig. 1, directly promotes blade 4 rotations by oil cylinder 17, and oil cylinder 17 is placed in the wheel hub 1, and oil enters wheel hub 1 by the hydraulic pressure slip ring.
In the utility model, each blade 4 of wind-driven generator all overlaps independently Hydrauservo System by one and drives, and when a blade 4 broke down, other two blades 4 still can proper functioning, thereby has increased the Security of system.This actuator is particularly useful for Large-scale Wind Turbines.
Become oar hydraulic system principle as shown in Figure 2.11 is urgent feathering accumulator, is installed in the wheel hub 1; 12 and 15 is system's accumulator, plays the fluid infusion effect when normal feather is operated and internal leakage is arranged, and is installed in the wheel hub 1; 13 is equilibrium valve, plays the back pressure effect, and oil cylinder 17 is operated steadily; 14 are solenoid directional control valve (often opening), control two states of blower fan proper functioning and urgent feathering with it; 16 is pressure measuring tie-in, is used for measuring pressure; 17 is oil cylinder; 18 is throttle orifice, is used for preventing that system oil-way from impacting; 19 is one-way valve; 20 is Proportional valve, is contained on the oil cylinder 17, and draught fan automatic control system is by realizing adjusting and the control to blade 4 pitch angles by control ratio valve 20; 21 is solenoid directional control valve (normally closed), controls two states of blower fan proper functioning and urgent feathering with it; 22 is throttle valve, is used for controlling the movement velocity of oil cylinder 17; Whether 23 is pressure switch, controlled to the accumulator repairing by its.
When the blower fan proper functioning, 4 solenoid directional control valve DT1 (normally closed), DT2 (often opening), DT3 (often opening), DT4 (normally closed) be energising all, and Proportional valve 20 is determined its working position (equilibrium position, to the left or to the right) according to the displacement transducer signal of oil cylinder 17; When fan trouble, 4 solenoid directional control valve dead electricity, blade 4 urgent featherings.Two limit positions of the high order end of oil cylinder 17 and low order end are 90 ° and 0 ° of corresponding blade 4 pitch angles respectively, and oil cylinder 17 and move right is distinguished the increase of corresponding blade 4 pitch angles and less left.
Working state can be divided into proper functioning and two kinds of urgent featherings.Under the blower fan normal operation, the pitch angle of blade 4 increases when reducing, and corresponding fluid circulation route is different.
When the pitch angle of blade 4 increased, promptly the hydraulic variable propeller system fluid circulation route of the piston rod 3 in the oil cylinder 17 when left movement added the circulation route that dotted line is represented fluid as shown in Figure 3 among the figure.At this moment, solenoid directional control valve DT1, DT2, DT3, DT4 all switch on.Oil enters oil cylinder 17 behind solenoid directional control valve DT4, Proportional valve 20, DT1, promote oil cylinder 17 to left movement; Simultaneously, after coming out from oil cylinder 17, the oil that is positioned at piston left side behind DT4, Proportional valve 20, DT1, gets back to oil cylinder 17 again, circulation so repeatedly arrives specified position up to oil cylinder 17, and such hydraulic differential technology has significantly improved the dynamic response sensitivity of hydraulic actuator.
When the pitch angle of blade 4 reduced, the hydraulic variable propeller system fluid circulation route when promptly the piston rod 3 in the oil cylinder 17 moves right added the circulation route that dotted line is represented fluid as shown in Figure 4 among the figure.At this moment, solenoid directional control valve DT1, DT2, DT3, DT4 all switch on.Oil enters oil cylinder 17 behind DT4 and Proportional valve 20, promote oil cylinder 17 and move right; Simultaneously, oil flows back to oil cylinder behind DT1 and Proportional valve 20, and circulation so repeatedly arrives specified position up to oil cylinder 17.
When unit broke down, promptly the hydraulic variable propeller system fluid circulation route during the urgent feathering of blade 4 added the circulation route that dotted line is represented fluid as shown in Figure 5 among the figure.At this moment, solenoid directional control valve DT1, DT2, the whole dead electricity of DT3, DT4.During urgent feathering, accumulator 11 is given the urgent fuel feeding of pitch-variable system, and oil enters oil cylinder 17 behind throttle valve 22 and DT2, promote oil cylinder 17 to left movement; Simultaneously, oil flows back to oil cylinder 17 behind DT3 and equilibrium valve 13, and circulation reaches high order end up to oil cylinder 17, i.e. the pitch angle to 90 of blade 4 ° position so repeatedly.
Claims (2)
1. the independent hydraulically controlled blade pitch device of wind-driven generator, comprise 3 the revolution supports (5) that are installed on the wheel hub (1), support the inner clip plate (9) that is rotationally connected respectively in (5) in each revolution, and, every inner clip plate (9) is fixedly installed in the bottom of blade (4) separately respectively, it is characterized in that: on wheel hub (1), install respectively and support (5) corresponding 3 oil cylinder seats (7) with revolution, an oil cylinder (17) is installed respectively on each oil cylinder seat (7), the outer end of the piston rod (3) of each oil cylinder (17) respectively be installed on corresponding inner clip plate (9) on eccentric mass (2) hinged.
2. the independent hydraulically controlled blade pitch device of wind-driven generator according to claim 1, it is characterized in that: oil cylinder (17) is connected with hydraulic system; In described hydraulic system, (A) of oil cylinder (17) mouth utilizes oil pipe to link to each other with solenoid directional control valve (DT1) and Proportional valve (20), and (B) of oil cylinder (17) mouthful is utilized oil pipe, solenoid directional control valve (DT3) and equilibrium valve (13) to link to each other with oil outlet (T); Urgent feathering accumulator (11) utilizes oil pipe to link to each other with Proportional valve (20) with oil outlet (T) respectively with throttle valve (22), utilizes oil pipe, throttle valve (22), solenoid directional control valve (DT2), one-way valve to link to each other with (A) mouth of oil cylinder (17) again; Proportional valve (20) utilizes solenoid directional control valve (DT4) to link to each other with filler opening (P) with one-way valve, utilizes oil pipe, solenoid directional control valve (DT4), one-way valve, solenoid directional control valve (DT2) to link to each other with (A) mouth of oil cylinder (17) again; System's accumulator valve (12) utilizes oil pipe to link to each other respectively with oil outlet (T) with Proportional valve (20), utilizes oil pipe to link to each other with (B) mouth of oil cylinder (17) with equilibrium valve (13), solenoid directional control valve (DT3) again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200392268U CN201092931Y (en) | 2007-06-04 | 2007-06-04 | Independent hydraulic pressure oar-changing mechanism for wind generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200392268U CN201092931Y (en) | 2007-06-04 | 2007-06-04 | Independent hydraulic pressure oar-changing mechanism for wind generator |
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| Publication Number | Publication Date |
|---|---|
| CN201092931Y true CN201092931Y (en) | 2008-07-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200392268U Expired - Fee Related CN201092931Y (en) | 2007-06-04 | 2007-06-04 | Independent hydraulic pressure oar-changing mechanism for wind generator |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102052250A (en) * | 2011-01-21 | 2011-05-11 | 三一电气有限责任公司 | Wind driven generator set and variable propeller pitch system thereof |
| CN102119272A (en) * | 2009-01-22 | 2011-07-06 | 三菱重工业株式会社 | Cylinder drive device |
| CN102477944A (en) * | 2010-11-26 | 2012-05-30 | 维斯塔斯风力系统有限公司 | Pilot circuitry for controlling the emergency feathering of wind turbine |
| CN102859185A (en) * | 2010-05-05 | 2013-01-02 | 罗伯特·博世有限公司 | Rotor blade pitch adjustment device |
| CN103061255A (en) * | 2013-01-11 | 2013-04-24 | 中国矿业大学 | Vertical arm oil cylinder buckling-restrained device and vertical arm oil cylinder buckling-restrained method for bridge detecting vehicle |
| CN103835880A (en) * | 2014-03-05 | 2014-06-04 | 沈阳华创风能有限公司 | Independent paddle switching system and method on basis of hydraulic effective damping |
| CN107587975A (en) * | 2017-08-14 | 2018-01-16 | 山东中车风电有限公司 | A kind of wind-driven generator hydraulic blade pitch device and system |
| CN108071619A (en) * | 2017-12-13 | 2018-05-25 | 新疆金风科技股份有限公司 | Variable pitch hydraulic system and wind power generating set |
| CN108884809A (en) * | 2016-02-04 | 2018-11-23 | 维斯塔斯风力系统有限公司 | Wind turbine pitch actuators mounting structure |
| CN109441724A (en) * | 2018-12-26 | 2019-03-08 | 北京金风科创风电设备有限公司 | Safety throttling device and method for hydraulic pitch control system and hydraulic pitch control system |
| CN110709601A (en) * | 2017-04-12 | 2020-01-17 | 西门子歌美飒可再生能源公司 | Safety stop assembly |
| CN111878306A (en) * | 2020-08-04 | 2020-11-03 | 上海电气风电集团股份有限公司 | Hydraulic pitch control method, device and system for wind turbine |
-
2007
- 2007-06-04 CN CNU2007200392268U patent/CN201092931Y/en not_active Expired - Fee Related
Cited By (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102119272A (en) * | 2009-01-22 | 2011-07-06 | 三菱重工业株式会社 | Cylinder drive device |
| CN102119272B (en) * | 2009-01-22 | 2013-01-09 | 三菱重工业株式会社 | Cylinder drive device |
| CN102859185A (en) * | 2010-05-05 | 2013-01-02 | 罗伯特·博世有限公司 | Rotor blade pitch adjustment device |
| CN102477944A (en) * | 2010-11-26 | 2012-05-30 | 维斯塔斯风力系统有限公司 | Pilot circuitry for controlling the emergency feathering of wind turbine |
| CN102477944B (en) * | 2010-11-26 | 2014-07-23 | 维斯塔斯风力系统有限公司 | Pilot circuitry for controlling the emergency feathering of wind turbine |
| CN102052250B (en) * | 2011-01-21 | 2012-07-04 | 三一电气有限责任公司 | Wind driven generator set and variable propeller pitch system thereof |
| CN102052250A (en) * | 2011-01-21 | 2011-05-11 | 三一电气有限责任公司 | Wind driven generator set and variable propeller pitch system thereof |
| CN103061255B (en) * | 2013-01-11 | 2015-05-20 | 中国矿业大学 | Vertical arm oil cylinder buckling-restrained device and vertical arm oil cylinder buckling-restrained method for bridge detecting vehicle |
| CN103061255A (en) * | 2013-01-11 | 2013-04-24 | 中国矿业大学 | Vertical arm oil cylinder buckling-restrained device and vertical arm oil cylinder buckling-restrained method for bridge detecting vehicle |
| CN103835880B (en) * | 2014-03-05 | 2016-06-22 | 沈阳华创风能有限公司 | Independent pitch system and change oar method based on hydraulic pressure effective damping |
| CN103835880A (en) * | 2014-03-05 | 2014-06-04 | 沈阳华创风能有限公司 | Independent paddle switching system and method on basis of hydraulic effective damping |
| US11208983B2 (en) | 2016-02-04 | 2021-12-28 | Vestas Wind Systems A/S | Wind turbine pitch actuator mounting structure |
| CN108884809A (en) * | 2016-02-04 | 2018-11-23 | 维斯塔斯风力系统有限公司 | Wind turbine pitch actuators mounting structure |
| CN108884809B (en) * | 2016-02-04 | 2020-08-25 | 维斯塔斯风力系统有限公司 | Wind turbine pitch actuator mounting structure |
| US11466664B2 (en) | 2017-04-12 | 2022-10-11 | Siemens Gamesa Renewable Energy A/S | Safety stop assembly |
| CN110709601B (en) * | 2017-04-12 | 2022-05-27 | 西门子歌美飒可再生能源公司 | Safety stop assembly |
| CN110709601A (en) * | 2017-04-12 | 2020-01-17 | 西门子歌美飒可再生能源公司 | Safety stop assembly |
| CN107587975A (en) * | 2017-08-14 | 2018-01-16 | 山东中车风电有限公司 | A kind of wind-driven generator hydraulic blade pitch device and system |
| CN108071619B (en) * | 2017-12-13 | 2020-03-17 | 新疆金风科技股份有限公司 | Variable-pitch hydraulic system and wind generating set |
| CN108071619A (en) * | 2017-12-13 | 2018-05-25 | 新疆金风科技股份有限公司 | Variable pitch hydraulic system and wind power generating set |
| CN109441724A (en) * | 2018-12-26 | 2019-03-08 | 北京金风科创风电设备有限公司 | Safety throttling device and method for hydraulic pitch control system and hydraulic pitch control system |
| CN111878306B (en) * | 2020-08-04 | 2021-11-26 | 上海电气风电集团股份有限公司 | Hydraulic pitch control method, device and system for wind turbine |
| CN111878306A (en) * | 2020-08-04 | 2020-11-03 | 上海电气风电集团股份有限公司 | Hydraulic pitch control method, device and system for wind turbine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080730 Termination date: 20100604 |