CN202832968U - Electro-hydraulic servo synchronizer of megawatt wind turbine generator set - Google Patents
Electro-hydraulic servo synchronizer of megawatt wind turbine generator set Download PDFInfo
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- CN202832968U CN202832968U CN2012205390842U CN201220539084U CN202832968U CN 202832968 U CN202832968 U CN 202832968U CN 2012205390842 U CN2012205390842 U CN 2012205390842U CN 201220539084 U CN201220539084 U CN 201220539084U CN 202832968 U CN202832968 U CN 202832968U
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- hydraulic servo
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- synchronizer
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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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Abstract
The utility model specially discloses an electro-hydraulic servo synchronizer of a megawatt wind turbine generator set. The electro-hydraulic servo synchronizer of the megawatt wind turbine generator set comprises a 2K-H differential motion planetary transmission mechanism and a direct-drive type volume control system. The 2K-H differential motion planetary transmission mechanism comprises a planetary carrier, planetary wheels, an inner gear ring, a sun wheel and a control gear, wherein the planetary wheels are installed on the planetary carrier and respectively meshed with the sun wheel and the inner gear ring, a central shaft of the inner gear ring is connected with the control gear, an output end of the planetary carrier is an input shaft I, an output end of the sun wheel is an output shaft II, and a central shaft of the control gear is a shaft III. The direct-drive type volume control system comprises a quantitative motor, a bidirectional quantative pump and a servo motor, the servo motor is connected with the bidirectional quantative pump which is connected with the quantative motor, and the quantative motor is connected with the shaft III and drives the control gear.
Description
Technical field
The utility model relates to a kind of megawatt-level wind unit electro-hydraulic servo synchronizer, is applicable to the megawatt-level wind unit Transmitted chains design of current main flow.
Background technique
Wind energy resources is the renewable energy sources of cleaning, and is inexhaustible at whole world aboundresources, the environmental protection of using.Therefore wind energy power has the characteristics of safety, cleaning, can be the mankind energy supply steady in a long-term is provided.At present, Main Developed Countries, developing country all will develop wind energy power technology as the important means of state basic policy and the challenge of the reply new century energy.Mechanical drive train and Electrified Transmission chain are the cores of wind-powered electricity generation unit, and such as Fig. 1, traditional megawatt-level wind unit machinery and Electrified Transmission chain mainly comprise wind wheel, step-up gear, generator and current transformer.Because the wave action of wind speed, the rotating speed of wind wheel changes, through after the speedup box, rotating speed rising moment of torsion reduces, rotating speed still is not invariable, and after the rotating speed of variation was input to generator, the power frequency that generator produces also changed, just need through the current transformer rectification, the frequency that forming electrical network needs just can be incorporated into the power networks.
Along with the ratio of wind-powered electricity generation in electrical network constantly raises, impact of wind generation on grid is increasing, and this has proposed the higher requirement of being incorporated into the power networks to the wind-powered electricity generation unit.Nowadays the current transformer technology can not satisfy all electric power networking requirements, need sometimes to increase extra module and satisfy the requirements such as low voltage crossing, this just increased system reduced complexity reliability.Along with the development of offshore wind farm, the reliability of wind-powered electricity generation unit to be had higher requirement, the reliability of device for high-power power electronic is the key factor of restriction wind-powered electricity generation unit development.Lot of domestic and international mechanism has carried out the research of mechanical synchronization device, attempts to replace the relatively low current transformer of reliability.
Existing mechanical synchronization device is mainly by following two kinds of forms, and a kind of is to carry out differential by the feedback of fluid torque converter to drive, and the servo-actuated property of this mechanism is good but manufacturing is complicated, and required precision is strict, and cost is higher, and fluid torque converter efficient is lower; Another kind is to drive the box of tricks speed governing by hydraulic servo or actuating motor; hydraulic servo variable displacement pump or variable displacement motor cost are higher; reaction velocity is slower; and use separately actuating motor need increase speed reducer; system's rotary inertia is increased; startup and speed adjusting performance are not as hydraulic system, and volume is large and the overload protection ability is lower, and is flexible poor than hydraulic system.
The model utility content
The rotating speed that existing wind-powered electricity generation unit passes over wind wheel by speedup box increases torque and reduces, by generator mechanical energy is converted to electric energy, variation along with wind speed round, the ac frequency of generator output constantly changes, ac frequency for terrible electrical network requirement, need to carry out frequency conversion by current transformer, the reliability of device for high-power power electronic and complexity become the key factor of restriction wind-powered electricity generation unit development.The shortcoming that exists for solving prior art, the utility model provides a kind of megawatt-level wind unit electro-hydraulic servo synchronizer, is applicable to the megawatt-level wind unit Transmitted chains design of current main flow.
The technical solution adopted in the utility model is as follows:
Megawatt-level wind unit electro-hydraulic servo synchronizer, comprise 2K-H differential planet transmission mechanism and direct drive type volume control system, described 2K-H differential planet transmission mechanism comprises planet carrier, planet wheel, ring gear, sun gear, control gear, described planet wheel is installed on the planet carrier, planet wheel meshes with sun gear and ring gear respectively, the central shaft of ring gear connects control gear, the planet carrier input end is input shaft I, the output terminal of described sun gear is output shaft II, and the central shaft of described control gear is axle III; Described direct drive type volume control system comprises fixed displacement motor, two-way quantitative pump and actuating motor, described actuating motor links to each other with the two-way quantitative pump, described two-way quantitative pump links to each other with fixed displacement motor, and described fixed displacement motor links to each other with axle III, drives control gear.
Be provided with safety valve, hydraulic lock and Fill valve between described fixed displacement motor and the two-way quantitative pump, described hydraulic lock and Fill valve are located in the integrated valve block.
Described safety valve links to each other with fixed displacement motor.
Described Fill valve is comprised of two Pilot operated check valve I, and described two Pilot operated check valve I directly link to each other with the oil inlet and outlet of two-way quantitative pump.
Described hydraulic lock is comprised of two Pilot operated check valve II, and described two Pilot operated check valve II directly link to each other with the import and export of fixed displacement motor.
Described input shaft I is connected with speedup box in the wind turbine transmission chain, and described output shaft II is connected with generator in the wind turbine transmission chain.
Described actuating motor links to each other with the two-way quantitative pump by coupling.
Described direct drive type volume control system also comprises boost air filter.
Described direct drive type volume control system also comprises a closed tank, and described two-way quantitative pump, hydraulic lock, Fill valve are located in the closed tank, and described boost air filter is installed on the closed tank, and communicates in the closed tank.
Boost air filter makes closed tank keep certain positive pressure, guarantees the normal oil suction of Fill valve, and when the pressure in the closed tank is higher than setting pressure, with unnecessary Bas Discharged.
Input shaft I connects speedup box, output shaft II connecting generator, A and B two-part connect by axle III, the rotating speed of input shaft I is constantly to change, output speed according to the B of adjustment of rotational speed system of input shaft I passes to the A of system by axle III, by the differential action of input shaft I and axle III, guarantee the constant airspeed of output shaft II, realize the constant purpose of generator input speed.
The beneficial effects of the utility model are: megawatt-level wind unit electro-hydraulic servo synchronizer is connected between speedup box and the synchronous generator, guarantees the invariablenes turning speed of input generator, does not need current transformer to be incorporated into the power networks, and has reliability high, the characteristics that the quality of power supply is high.B is the direct drive type volume control system in the utility model, and it combines the fast and hydraulic system of electrical servo system response large, the flexible characteristics of exerting oneself.With respect to the fluid torque converter synchro system, system's manufacturing that the utility model adopts is simple, and cost is low and efficient is high.Replaced servo variable pump or the variable displacement motor in the Hydrauservo System with actuating motor, by actuating motor rotating speed and the variation regulating system output that turns to, reaction velocity is fast, and cost is low.Actuating motor reduces system's rotary inertia after hydraulic system is combined, and starts and the speed adjusting performance raising, and small volume and overload protection ability are higher, and system flexibility is good, more is fit to the larger operating mode of wind-powered electricity generation unit load fluctuation.In addition by the control rotating speed of actuating motor and output flow and the direction that direction can be controlled the two-way quantitative pump, and then rotating speed and the direction of control fixed displacement motor.Safety valve prevents impulsive load to the destruction of the B of system, and hydraulic lock is comprised of two Pilot operated check valve II, stops the fixed displacement motor counter-rotating, and Fill valve is comprised of two Pilot operated check valve I, but the leakage of bucking-out system fluid.
Description of drawings
Fig. 1 is for using current transformer wind turbine transmission chain schematic diagram;
Fig. 2 is for using electro-hydraulic servo synchronizer wind turbine transmission chain schematic diagram;
Fig. 3 is megawatt-level wind unit electro-hydraulic servo synchronizer structure schematic diagram;
Fig. 4 is hydraulic pressure pack arrangement schematic diagram;
Fig. 5 is integrated valve block structure figure;
Fig. 6 is the Fill valve structural drawing;
Fig. 7 is electro-hydraulic servo synchronizer control system schematic diagram;
Among the figure 1, planet carrier, 2, planet wheel, 3, ring gear, 4, sun gear, 5, control gear, 6, fixed displacement motor, 7, safety valve, 8, hydraulic lock, 9, Fill valve, 10, the two-way quantitative pump, 11, actuating motor, 12, speed probe I, 13, speed probe II, 14, coupling, 15, integrated valve block, 16, boost air filter, 17, closed tank, 18, Pilot operated check valve I, 19, Pilot operated check valve II.
Embodiment
Such as Fig. 2, use wind-powered electricity generation unit machinery and the Electrified Transmission chain of electro-hydraulic servo synchronizer mainly to comprise wind wheel, step-up gear, electro-hydraulic servo synchronizer, synchronous generator, the speedup box output speed changes, through becoming constant rotating speed after the electro-hydraulic servo synchronizer, obtain the frequency of electrical network requirement behind the input synchronous generator, can direct grid-connected.Native system is realized synchronization control with low power electric elements control actuating motor 11 by direct drive type volume control system and differential planetary driving mechanism, has replaced the current transformer that the high-power electric and electronic element forms, and has improved whole aircraft reliability.
Such as Fig. 3, the utility model mainly is comprised of A and B two-part, and A is 2K-H differential planet transmission mechanism, and B is the direct drive type volume control system.Input shaft I connects speedup box, output shaft II connecting generator, A and B two-part connect by axle III, the rotating speed of input shaft I is constantly to change, output speed according to the B of adjustment of rotational speed system of input shaft I passes to the A of system by axle III, by the differential action of input shaft I and axle III, guarantee the constant airspeed of output shaft II, realize the constant purpose of generator input speed.The control of rotating speed realizes by composition of the control system, and composition of the control system is accepted wind-powered electricity generation unit complete machine master control system control signal and processed simultaneously, makes the electro-hydraulic servo synchronizer realize the complete machine service condition.
System A is 2K-H differential planet transmission mechanism, is comprised of planet carrier 1, planet wheel 2, ring gear 3, sun gear 4, control gear 5, by the differential action of input shaft I and axle III, guarantees output shaft II constant airspeed.The rotating speed of axle III will be according to the adjustment of rotational speed of input shaft I, the rotating speed of guarantee output shaft II is constant, and will through the calculating of overpower stream, select input shaft I and the suitable rotating speed Proportional coefficient K of axle III, could reduce circulating power, guarantee higher system effectiveness.
System B is the direct drive type volume control system, formed by fixed displacement motor 6, safety valve 7, hydraulic lock 8, Fill valve 9, two-way quantitative pump 10, actuating motor 11, by the rotating speed of control actuating motor 11 and output flow and the direction that direction can be controlled two-way quantitative pump 10, and then rotating speed and the direction of control fixed displacement motor 6.Safety valve 7 prevents impulsive load to the destruction of the B of system, and hydraulic lock 8 is comprised of two Pilot operated check valve II19, stops fixed displacement motor 6 counter-rotatings, and Fill valve 9 is comprised of two Pilot operated check valve I18, but the leakage of bucking-out system fluid.
This system can be connected between speedup box and the synchronous generator, also can be integrated together with speedup box, can require to select according to wind-powered electricity generation unit overall design.
Such as Fig. 4, the hydraulic pressure bag mainly is comprised of two-way quantitative pump 10, actuating motor 11, coupling 14, integrated valve block 15, boost air filter 16, closed tank 17.Boost air filter 16 can make the certain positive pressure of maintenance in the closed tank 17, guarantees Fill valve 9 normal oil suctions, and when the pressure in the closed tank 17 is higher than setting pressure, with unnecessary Bas Discharged.
Such as Fig. 5, integrated valve block 15 is comprised of hydraulic lock 8 and Fill valve 9 two-part, integrated valve block 15 designs have reduced pipeline and joint, that hydraulic system is without a kind of common method of pipeization Placement, it can simplify the design and installation of hydraulic system, is convenient to realize the integrated and standardization of hydraulic system.Can prevent the leakage of hydraulic oil, reduce channel volume, improve dynamic performance.
Such as Fig. 6, Fill valve 9 is comprised of a pair of Pilot operated check valve I18 that is inserted in the integrated valve block 15, and Pilot operated check valve I18 is standard piece, the high and low price of reliability, plug-in mounting structure guarantees good airproof performance, without leak and oil suction reliable.Repairing mouth A, B connect the oil inlet and outlet of two-way quantitative pump 10 among the figure, and inlet port O directly immerses in the fluid of closed tank 17.
Such as Fig. 7, C is composition of the control system, and the electro-hydraulic servo synchronizer is controlled in real time, and simultaneously composition of the control system C links to each other with wind-powered electricity generation unit complete machine master control system, accepts the control signal of master control and processes.Speed probe I12 and speed probe II13 detect respectively the rotating speed of axle III and input shaft I, through after the conversion of data collecting card, the respective value of axle III is subtracted each other with the respective value of input shaft I after multiply by Proportional coefficient K, input as controller, wherein K tries to achieve according to the characteristic of differential gear train, needs so that differential gear train efficient is maximum.Controller carries out analytical calculation to the signal of input, again through D/A conversion, converts the signal that the driver of actuating motor 11 can receive to, and actuating motor 11 is implemented control.System A is 2KH differential planet transmission mechanism, and B is the direct drive type volume control system, and C is composition of the control system, and the three has formed closed loop control system, assurance system output synchronous speed, and the work of high efficient and reliable ground.
Claims (8)
1. megawatt-level wind unit electro-hydraulic servo synchronizer, comprise 2K-H differential planet transmission mechanism and direct drive type volume control system, described 2K-H differential planet transmission mechanism comprises planet carrier, planet wheel, ring gear, sun gear, control gear, described planet wheel is installed on the planet carrier, planet wheel meshes with sun gear and ring gear respectively, the central shaft of ring gear connects control gear, the planet carrier input end is input shaft I, the output terminal of described sun gear is output shaft II, and the central shaft of described control gear is axle III; Described direct drive type volume control system comprises fixed displacement motor, two-way quantitative pump, actuating motor, described actuating motor links to each other with the two-way quantitative pump, described two-way quantitative pump links to each other with fixed displacement motor, and described fixed displacement motor links to each other with axle III, drives control gear.
2. megawatt-level wind unit electro-hydraulic servo synchronizer as claimed in claim 1, it is characterized in that: be provided with safety valve, hydraulic lock and Fill valve between described fixed displacement motor and the two-way quantitative pump, described hydraulic lock and Fill valve are located in the integrated valve block.
3. megawatt-level wind unit electro-hydraulic servo synchronizer as claimed in claim 2, it is characterized in that: described safety valve links to each other with fixed displacement motor.
4. megawatt-level wind unit electro-hydraulic servo synchronizer as claimed in claim 2, it is characterized in that: described Fill valve is comprised of two Pilot operated check valve I, and described two Pilot operated check valve I directly link to each other with the oil inlet and outlet of two-way quantitative pump.
5. megawatt-level wind unit electro-hydraulic servo synchronizer as claimed in claim 2, it is characterized in that: described hydraulic lock is comprised of two Pilot operated check valve II, and described two Pilot operated check valve II directly link to each other with the import and export of fixed displacement motor.
6. megawatt-level wind unit electro-hydraulic servo synchronizer as claimed in claim 1 is characterized in that: described input shaft I is connected with speedup box in the wind turbine transmission chain, and described output shaft II is connected with generator in the wind turbine transmission chain.
7. megawatt-level wind unit electro-hydraulic servo synchronizer as claimed in claim 1, it is characterized in that: described actuating motor links to each other with the two-way quantitative pump by coupling.
8. megawatt-level wind unit electro-hydraulic servo synchronizer as claimed in claim 2, it is characterized in that: described direct drive type volume control system also comprises a closed tank and boost air filter, described two-way quantitative pump, hydraulic lock, Fill valve are located in the closed tank, described boost air filter is installed on the closed tank, and communicates in the closed tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205390842U CN202832968U (en) | 2012-10-19 | 2012-10-19 | Electro-hydraulic servo synchronizer of megawatt wind turbine generator set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205390842U CN202832968U (en) | 2012-10-19 | 2012-10-19 | Electro-hydraulic servo synchronizer of megawatt wind turbine generator set |
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| Publication Number | Publication Date |
|---|---|
| CN202832968U true CN202832968U (en) | 2013-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012205390842U Expired - Lifetime CN202832968U (en) | 2012-10-19 | 2012-10-19 | Electro-hydraulic servo synchronizer of megawatt wind turbine generator set |
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| CN (1) | CN202832968U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102900607A (en) * | 2012-10-19 | 2013-01-30 | 济南轨道交通装备有限责任公司 | Electro-hydraulic servo synchronizer for megawatt wind turbine generator |
| CN105443684A (en) * | 2015-12-22 | 2016-03-30 | 中国兵器工业集团第二○二研究所 | Planet gear transmission infinite acceleration mechanism |
-
2012
- 2012-10-19 CN CN2012205390842U patent/CN202832968U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102900607A (en) * | 2012-10-19 | 2013-01-30 | 济南轨道交通装备有限责任公司 | Electro-hydraulic servo synchronizer for megawatt wind turbine generator |
| CN102900607B (en) * | 2012-10-19 | 2015-05-27 | 济南轨道交通装备有限责任公司 | Electro-hydraulic servo synchronizer for megawatt wind turbine generator |
| CN105443684A (en) * | 2015-12-22 | 2016-03-30 | 中国兵器工业集团第二○二研究所 | Planet gear transmission infinite acceleration mechanism |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130327 Effective date of abandoning: 20150527 |
|
| RGAV | Abandon patent right to avoid regrant |