CN203627083U - Hydraulic yaw system - Google Patents
Hydraulic yaw system Download PDFInfo
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- CN203627083U CN203627083U CN201320576893.5U CN201320576893U CN203627083U CN 203627083 U CN203627083 U CN 203627083U CN 201320576893 U CN201320576893 U CN 201320576893U CN 203627083 U CN203627083 U CN 203627083U
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- yawing system
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- 230000007246 mechanism Effects 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 3
- 230000000979 retarding effect Effects 0.000 claims description 3
- 238000009827 uniform distribution Methods 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 78
- 238000000034 method Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 241001347978 Major minor Species 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000002463 transducing effect Effects 0.000 description 1
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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 discloses a hydraulic yaw system. The hydraulic yaw system comprises a hydraulic pump, a first group of hydraulic execution elements, a second group of hydraulic execution elements, a two-position four-way electromagnetic valve and a three-position four-way electro-hydraulic proportional valve, wherein the hydraulic pump supplies power to the hydraulic yaw system, every hydraulic execution element is connected with a gear of a driving yaw bearing, the two-position four-way electromagnetic valve comprises a first port, a second port, a third port and a fourth port, the hydraulic execution elements in the first group are parallelly connected between the first port and the second port, the hydraulic execution elements in the second group are parallelly connected between the third port and the fourth port, and the three-position four-way electro-hydraulic proportional valve is parallelly connected with the hydraulic execution elements in the first group and connected with the hydraulic pump. The hydraulic execution elements in the first group supply yawing torque, and the two-position four-way electromagnetic valve controls the hydraulic execution elements in the second group to steer, so that the hydraulic execution elements in the second group can provide yawing torque or braking torque. The hydraulic yaw system has the advantages of flexible starting, simple structure, uniform distribution of load of a small yaw gear and capability of enabling yawing movement to be stable.
Description
Technical field
The utility model relates to wind-driven generator field, more particularly, relates to a kind of hydraulic yawing system for wind-driven generator.
Background technique
For wind-driven generator, only have when impeller is in state windward, that is, when impeller is vertical with wind direction, wind-driven generator could normal power generation.But the wind-force of natural wind field and wind direction can change at any time, therefore, wind-driven generator also needs to change thereupon, could normally work.For this reason, on wind-driven generator, need to arrange yaw system, so that the impeller of blower fan is all the time in attitude windward.In general, wind-driven generator is realized the driftage control of wind-driven generator by the go off course rotation of Bearing gear of driving.
Patent documentation CN103047082A discloses a kind of for wind power generating set hydraulic yawing system and regulate and control method thereof.It provides the driftage oil hydraulic motor of opposing torque by multiple yaw motors that normal torque is provided and relative yaw motor are set, yaw motor is connected by reducer gear the bearing of going off course respectively with driftage oil hydraulic motor; In the time there is driftage work, the opposing torque that driftage oil hydraulic motor provides is less than the normal torque of yaw motor, judge the mated condition of blower fan and wind direction according to transducing signal, when blower fan, to rotate to impeller vertical with wind direction, impeller is in the time of state windward, it is consistent that yaw motor and oil hydraulic motor torque size reach balance, the end-of-job of going off course, and driftage brake device quits work with driftage drag friction dish.Engage with the gear of driftage bearing external gear by reducer gear, reach whole yaw system balance.
Patent document CN101576053A discloses the hydraulic yawing system of another wind power plant.This system mainly comprises major-minor oil circuit, yaw motor, yaw motor brake and driftage brake.Yaw motor brake is connected on auxiliary oil circuit, and yaw motor is connected on working connection, by the control of yaw motor and driftage brake is realized to driftage.
In the driftage scheme of prior art, existence starts the problems such as impact is large, yaw system complex structure, control complexity.
Model utility content
The purpose of this utility model is to provide a kind of hydraulic yawing system simple in structure.
Another object of the present utility model is to provide a kind of startup to impact little hydraulic yawing system.
The hydraulic yawing system that provides a kind of load to be evenly distributed is provided another object of the present utility model.
To achieve these goals, provide a kind of hydraulic yawing system, comprising: oil hydraulic pump, is connected with hydraulic power, for described hydraulic yawing system provides power; First group of hydraulic actuator and second group of hydraulic actuator, the each hydraulic actuator in every group of hydraulic actuator is all connected with driftage Bearing gear; Two-position four-way solenoid valve, comprise the 3rd interface and the 4th interface that are positioned at first interface and second interface of a side and are positioned at the second side, first group of hydraulic actuator is connected in parallel between first interface and the second interface, and second group of hydraulic actuator is connected in parallel between the 3rd interface and the 4th interface; 3-position 4-way electro-hydraulic proportional valve, in parallel with first group of hydraulic actuator and be connected with oil hydraulic pump, for controlling the moving direction of first group of hydraulic actuator, wherein, wherein, first group of hydraulic actuator provides driftage torque, and the turning to of second group of hydraulic actuator of two-position four-way solenoid valve control, so that second group of hydraulic actuator provides driftage torque or retarding torque.
First group of hydraulic actuator can comprise at least one hydraulic actuator.
Second group of hydraulic actuator can comprise at least one hydraulic actuator.
Described hydraulic yawing system also can comprise the relief valve being arranged between oil hydraulic pump and 3-position 4-way electro-hydraulic proportional valve, to control the pressure of hydraulic yawing system.
Described 3-position 4-way electro-hydraulic proportional valve can comprise meta, when 3-position 4-way electro-hydraulic proportional valve is during in meta, and described hydraulic yawing system off-load.
Described hydraulic actuator can be oil hydraulic motor, and this oil hydraulic motor drives driftage Bearing gear by small gear.
Described hydraulic yawing system also can comprise the retarder that connects each oil hydraulic motor and corresponding small gear.
Described hydraulic actuator can be oil hydraulic cylinder.
Described oil hydraulic cylinder can drive driftage Bearing gear by rackwork or screw mechanism.
Described oil hydraulic cylinder can be double action oil hydraulic cylinder.
According to hydraulic yawing system of the present utility model, it has the characteristic of soft start, and it is simple in structure, driftage small gear load is evenly distributed, and driftage work can steadily be carried out.
Accompanying drawing explanation
By the description of carrying out below in conjunction with accompanying drawing, above and other object of the present utility model and feature will become apparent, wherein:
Fig. 1 is the hydraulic yawing system illustrating according to embodiment of the present utility model.
Embodiment
Below, describe with reference to the accompanying drawings embodiment of the present utility model in detail.
Hereinafter, 1 describe in detail according to embodiment's of the present utility model hydraulic yawing system 100 with reference to the accompanying drawings.
As shown in fig. 1, hydraulic yawing system 100 comprises: oil hydraulic pump 10, be connected with hydraulic power, and think that each hydraulic actuator in whole hydraulic yawing system provides power; First group of oil hydraulic motor 40 and second group of oil hydraulic motor 50; Two-position four-way solenoid valve 60, comprise first interface 1 and the second interface 2 that is positioned at a side and the 3rd interface 3 and the 4th interface 4 that is positioned at the second side, first group of oil hydraulic motor 40 is connected in parallel between first interface 1 and the second interface 2, and second group of oil hydraulic motor 50 is connected in parallel between the 3rd interface 3 and the 4th interface 4.First group of oil hydraulic motor 40 comprises the first oil hydraulic motor 41 and the second oil hydraulic motor 42, and second group of oil hydraulic motor 50 comprises the 3rd oil hydraulic motor 51 and the 4th oil hydraulic motor 52.Two-position four-way solenoid valve 60 has two working positions, that is, and and normotopia and antiposition (or left position and right position).When the working position of solenoid valve 60 is during in left position, second group of oil hydraulic motor 50 turn to can with the switched in opposite of first group of oil hydraulic motor 40.In this case, the position of the unit of wind-driven generator is lockable, and does not therefore go off course.When the working position of solenoid valve 60 is during in right position, first group of oil hydraulic motor 40 and second group of oil hydraulic motor 50 rotate in the same direction, the set yaw of wind-driven generator.
In addition, hydraulic yawing system 100 also comprises and first group of 3-position 4-way electro-hydraulic proportional valve 30 that oil hydraulic motor 40 is in parallel.
3-position 4-way electro-hydraulic proportional valve 30 has three working positions, comprises normotopia, antiposition and off-load position (or left position, right position and meta).When 3-position 4-way electro-hydraulic proportional valve 30 is during in normotopia, first group of oil hydraulic motor 40 can be rotated in the forward; When 3-position 4-way electro-hydraulic proportional valve 30 is during in antiposition, first group of oil hydraulic motor 40 can counterrotating; When 3-position 4-way electro-hydraulic proportional valve 30 is during in off-load position, the direct rework solution potential source of hydraulic oil of being supplied by oil hydraulic pump 10, hydraulic yawing system 100 off-loads thus.First group of oil hydraulic motor 40 can be selected sense of rotation according to wind direction.
When implementing when driftage, first group of oil hydraulic motor 40 and second group of oil hydraulic motor 50 all can be used as yaw motor, so that the driftage Bearing gear of wind-driven generator is towards direction rotation windward.In order to reduce the rotational impact of driftage and driftage work to be carried out gently, each oil hydraulic motor is for example, by retarder and small gear and driftage Bearing gear (, driftage bearing external gear) connection, to drive the rotation of driftage bearing external gear.Particularly, the first oil hydraulic motor 41 drives driftage bearing external gear by the first retarder 81 and the first small gear 71; The second oil hydraulic motor 42 drives driftage bearing external gear by the second retarder 82 and the second small gear 72.Similar with first group of oil hydraulic motor 40, second group of oil hydraulic motor 50 comprises the 3rd oil hydraulic motor 51 and the 4th oil hydraulic motor 52, and each oil hydraulic motor is also for example, by retarder and small gear and driftage Bearing gear (, driftage bearing external gear) connection.Particularly, the 3rd oil hydraulic motor 51 drives driftage bearing external gear by the 3rd retarder 83 and third pinion 73; The 4th oil hydraulic motor 52 drives driftage bearing external gear by the 4th retarder 84 and fourth pinion 74.Obviously, the embodiment of the present utility model Bearing gear that is also applicable to go off course is the situation of internal gear.
Second group of oil hydraulic motor 50 also can be used as the brake motor of going off course, and for applying the torque contrary with the torque of yaw motor, thereby prevents the damage in the time that wind-force is large, wind-driven generator being caused.Therefore, in driftage braking process, the station of two-position four-way solenoid valve 60 changes to left position from right position, and correspondingly, the sense of rotation of second group of oil hydraulic motor 50 becomes contrary with the sense of rotation of first group of oil hydraulic motor 40.In addition, according to the size of wind-force, can utilize two-position four-way solenoid valve 60 to control the rotating speed of second group of oil hydraulic motor 50, to apply suitable opposing torque.
Between 3-position 4-way electro-hydraulic proportional valve 30 and oil hydraulic pump 10, relief valve 20 is also installed, to control the pressure in hydraulic yawing system.In fact, solenoid valve 60 and electro-hydraulic proportional valve 30 also can be controlled pressure in corresponding oil hydraulic circuit.
In the time the impeller of wind motor need to being gone off course towards upwind position, determine turning to of first group of oil hydraulic motor 40 by 3-position 4-way electro-hydraulic proportional valve 30, and the station of two-position four-way solenoid valve 60 is placed in to right position, so that first group of oil hydraulic motor 40 and second group of oil hydraulic motor 50 be towards identical direction rotation, thereby realize fast driftage.
In driftage braking process, by two-position four-way solenoid valve 60(as shown in fig. 1, make solenoid valve 60 in left position) control turning to and the switched in opposite of first group of oil hydraulic motor 40 of second group of oil hydraulic motor 50, thereby first group of oil hydraulic motor 40 provides driftage torque, second group of oil hydraulic motor 50 provides the retarding torque with the torque reversal of going off course, and the impeller of controlling reposefully thus wind motor is in direction windward.
Can find out by description above, compared with electronic yaw system, saved some yaw motors according to embodiment's of the present utility model hydraulic yawing system, amount of parts is few, simple in structure.Meanwhile, owing to can realizing by oil hydraulic motor the self-locking of whole fan yaw system according to embodiment's of the present utility model hydraulic yawing system, so can save braking system or adopt less break.
And, owing to adopting oil hydraulic motor to realize the driftage of wind-driven generator according to yaw system of the present utility model, can realize soft start, thus the infringement of the impact while having avoided driftage to start to driftage Bearing gear.
In addition, according to embodiment's of the present utility model hydraulic yawing system, due to connect between the hydraulic pipe line of driftage oil hydraulic motor, communicate with each other and pressure identical, therefore, be evenly distributed with the load of the driftage small gear that engages of driftage Bearing gear.Although show in the accompanying drawings first group of oil hydraulic motor and second group of oil hydraulic motor includes two oil hydraulic motors, but the utility model is not limited to this, every group of oil hydraulic motor can be also an oil hydraulic motor, or three or more oil hydraulic motors, the quantity of oil hydraulic motor can be determined according to the size of yawing moment.
In the time that the quantity of every group of oil hydraulic motor is more, can adopt the retarder of less progression or omit to increase the retarder of turning round for slowing down.In addition,, in the time that the torque of system is very large, also should correspondingly increase the number of yaw motor, driftage brake motor, retarder and small gear.
In the above embodiments, the example using oil hydraulic motor as hydraulic actuator drives driftage Bearing gear, but the utility model is not limited to this, for example, also can adopt oil hydraulic cylinder to drive driftage Bearing gear.Due to driftage Bearing gear forms of motion for rotatablely moving, and the forms of motion of oil hydraulic cylinder is straight line motion, for this reason, need between oil hydraulic cylinder and driftage Bearing gear, arrange and can be converted into by rotatablely moving straight-line drive mechanism, such as pinion and rack, screw mechanism etc., can drive driftage Bearing gear.Preferably, oil hydraulic cylinder adopts double action oil hydraulic cylinder.
In the time adopting Driven by Hydraulic Cylinder driftage Bearing gear, the working principle of the embodiment shown in working principle and Fig. 1 of hydraulic system is similar, is not described in detail at this.
The utility model is not limited to above-described embodiment, in the situation that not departing from the utility model scope, can carry out various changes and modifications.
Claims (10)
1. a hydraulic yawing system, is characterized in that, comprising:
Oil hydraulic pump, is connected with hydraulic power, for described hydraulic yawing system provides power;
First group of hydraulic actuator and second group of hydraulic actuator, the each hydraulic actuator in every group of hydraulic actuator is all connected with driftage Bearing gear;
Two-position four-way solenoid valve, comprise the 3rd interface and the 4th interface that are positioned at first interface and second interface of a side and are positioned at the second side, first group of hydraulic actuator is connected in parallel between first interface and the second interface, and second group of hydraulic actuator is connected in parallel between the 3rd interface and the 4th interface;
3-position 4-way electro-hydraulic proportional valve, in parallel with first group of hydraulic actuator and be connected with oil hydraulic pump, for controlling the moving direction of first group of hydraulic actuator,
Wherein, first group of hydraulic actuator provides driftage torque, and the turning to of second group of hydraulic actuator of two-position four-way solenoid valve control, so that second group of hydraulic actuator provides driftage torque or retarding torque.
2. hydraulic yawing system as claimed in claim 1, is characterized in that,
First group of hydraulic actuator comprises at least one hydraulic actuator.
3. hydraulic yawing system as claimed in claim 1, is characterized in that,
Second group of hydraulic actuator comprises at least one hydraulic actuator.
4. hydraulic yawing system as claimed in claim 1, is characterized in that, described hydraulic yawing system also comprises the relief valve being arranged between oil hydraulic pump and 3-position 4-way electro-hydraulic proportional valve, to control the pressure of hydraulic yawing system.
5. hydraulic yawing system as claimed in claim 1, is characterized in that, described 3-position 4-way electro-hydraulic proportional valve comprises meta, when 3-position 4-way electro-hydraulic proportional valve is during in meta, and described hydraulic yawing system off-load.
6. hydraulic yawing system as claimed in claim 1, is characterized in that, described hydraulic actuator is oil hydraulic motor, and this oil hydraulic motor drives driftage Bearing gear by small gear.
7. hydraulic yawing system as claimed in claim 6, is characterized in that, described hydraulic yawing system also comprises the retarder that connects each oil hydraulic motor and corresponding small gear.
8. hydraulic yawing system as claimed in claim 1, is characterized in that, described hydraulic actuator is oil hydraulic cylinder.
9. hydraulic yawing system as claimed in claim 1, is characterized in that, described oil hydraulic cylinder drives driftage Bearing gear by rackwork or screw mechanism.
10. hydraulic yawing system as claimed in claim 9, is characterized in that, described oil hydraulic cylinder is double action oil hydraulic cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320576893.5U CN203627083U (en) | 2013-09-17 | 2013-09-17 | Hydraulic yaw system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320576893.5U CN203627083U (en) | 2013-09-17 | 2013-09-17 | Hydraulic yaw system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203627083U true CN203627083U (en) | 2014-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320576893.5U Expired - Lifetime CN203627083U (en) | 2013-09-17 | 2013-09-17 | Hydraulic yaw system |
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| Country | Link |
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| CN (1) | CN203627083U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103498758A (en) * | 2013-09-17 | 2014-01-08 | 北京金风科创风电设备有限公司 | Hydraulic yawing system |
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2013
- 2013-09-17 CN CN201320576893.5U patent/CN203627083U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103498758A (en) * | 2013-09-17 | 2014-01-08 | 北京金风科创风电设备有限公司 | Hydraulic yawing system |
| CN103498758B (en) * | 2013-09-17 | 2015-11-25 | 北京金风科创风电设备有限公司 | Hydraulic yawing system |
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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: 20140604 Effective date of abandoning: 20151125 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20140604 Effective date of abandoning: 20151125 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |