CN110925136A - Safe feathering device of wind turbine generator system - Google Patents
Safe feathering device of wind turbine generator system Download PDFInfo
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- CN110925136A CN110925136A CN201911245373.4A CN201911245373A CN110925136A CN 110925136 A CN110925136 A CN 110925136A CN 201911245373 A CN201911245373 A CN 201911245373A CN 110925136 A CN110925136 A CN 110925136A
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- wind turbine
- turbine generator
- worm
- driving
- flywheel
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- 230000007246 mechanism Effects 0.000 claims abstract description 14
- 210000003746 feather Anatomy 0.000 claims abstract description 7
- 238000012546 transfer Methods 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/0204—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor for orientation in relation to wind direction
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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
- 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
- F03D7/024—Adjusting aerodynamic properties of the blades of individual blades
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Wind Motors (AREA)
Abstract
A safe feathering device of a wind turbine generator relates to the technical field of feathering devices of wind turbine generators and comprises a linkage mechanism for driving a plurality of fan blades to feather simultaneously. The method is used for solving the problem that in the traditional technology, if the smooth shutdown of the wind turbine generator is realized in an independent feathering mode, all blades must be feathered in place, and the fault probability is high; when all the blades are subjected to pitch variation in a common feathering mode, once the main drive fails, all the blades cannot be feathered, and safety accidents are easily caused.
Description
Technical Field
The invention relates to a safe feathering device of a wind turbine generator, belonging to the technical field of wind power generator equipment.
Background
The existing high-power wind generating set is in an unattended state in the operation process, a local control system of the wind generating set automatically controls various operation working conditions, can automatically adjust the generating power and the rotating speed of a wind wheel according to the wind speed, automatically controls grid connection, grid disconnection and the like, can remotely monitor the wind generating set, remotely acquires various data of the wind generating set and manually operates the wind generating set;
the wind generating set has perfect protection functions, such as automatic alarm and shutdown in case of faults, and the protection functions of the wind generating set generally include overspeed, generator overload and fault, over-vibration, loss of power grid or load, shutdown failure in case of grid disconnection, pitch fault and the like. The protection link is multi-level safety chain interlocking, has a logical AND function in the control process, and can realize a logical OR result in the aspect of achieving the control target. The protection link is designed on the principle of failure protection, namely when the control fails and the wind turbine generator cannot normally run due to internal or external faults of the wind turbine generator, the system safety protection system acts;
the intellectual property office of China discloses a patent number 201910509228.6, which comprises the steps of changing the shutdown feathering speed of a wind turbine generator from an initial first shutdown feathering speed to a third shutdown feathering speed according to the rotating speed of a generator and the acceleration of a cabin; the first shutdown feathering speed is determined by the pitch angle of the wind turbine at the initial moment, and the second shutdown feathering speed is determined by the pitch angle of the wind turbine at the current moment; and changing the shutdown feathering speed of the wind turbine generator from the second shutdown feathering speed to a third shutdown feathering speed according to the rotating speed and the power of the generator, and finishing feathering and shutdown at the third shutdown feathering speed.
However, the device gradually reveals the shortcomings of the technology in the using process, mainly in the following aspects.
Firstly, the existing high-power wind generating set generally adopts three blades to independently change the pitch, and if the wind generating set stops, the three blades automatically feather to a preset position. However, if the driving device of one or two of the blades fails, the blades are blocked and cannot reach the preset position, and the wind turbine generator cannot be shut down smoothly. Only if all the driving devices work normally, the wind generating set can be shut down smoothly according to expectation. The blades of the fan are independently variable, so that the failure probability in feathering is greatly improved.
Secondly, a fault state that probability is extremely low, namely three drives of the wind generating set are all in fault, the blade can not return to the stop position, at this moment, the load of the wind generating set is thrown away, the blade is in the operating position, the wind wheel can rotate faster and faster, a runaway is formed, after the rotating speed exceeds a certain value, vibration is strengthened, the strength of the blade and each component is surpassed, the connection of the blade and each component is broken, if one of the blades is broken, the rotary vibration of the blade is stronger, and finally the wind generating set is collapsed, so that huge loss is generated.
Existing research and development personnel only realize feathering of the blades independently, but neglect to ensure safe shutdown of the wind turbine generator, ensure that all the blades are feathered in place, and improve the feathering risk; and the prior art also focuses on how to realize simultaneous pitch variation of all the blades through the main drive, although the mode can realize pitch variation of all the blades, when the main drive fails, all the blades cannot be feathered, and safety accidents are directly caused.
In view of the above, the prior art is obviously inconvenient and disadvantageous in practical use, and needs to be improved.
Disclosure of Invention
Aiming at the defects, the invention provides a safe feathering device of a wind turbine generator, which is used for solving the problem that in the traditional technology, if the wind turbine generator is to be shut down smoothly in an independent feathering mode, all blades must be feathered in place, and the failure probability is high; when all the blades are subjected to pitch variation in a common feathering mode, once the main drive fails, all the blades cannot be feathered, and safety accidents are easily caused.
In order to solve the technical problems, the invention adopts the following technical scheme:
a safe feathering device of a wind turbine generator comprises a linkage mechanism which is used for driving a plurality of fan blades to feather.
As an improved scheme, a transfer component for independently driving each fan blade to feather is further installed on the linkage mechanism.
As an improved scheme, the linkage mechanism comprises a driving wheel coaxially arranged along the rotation center of a plurality of fan blades, and each blade is further provided with a driven wheel which is used for being in transmission with the driving wheel.
As an improved scheme, a locking component used for positioning the fan blade is further installed on the linkage mechanism.
As an improved scheme, the locking component comprises a worm and worm gear set, a worm of the worm and worm gear set is in power connection with the driven wheel, and a worm wheel of the worm and worm gear set is in power connection with the fan blade.
As an improved scheme, the transfer part comprises a driving machine and a flywheel, the outer ring of the flywheel is coaxially and fixedly connected with the driven wheel, and the driving machine is in power connection with the worm.
As a modified scheme, the driven wheel is in power connection with a first bevel gear, the first bevel gear is meshed with a second bevel gear, and the second bevel gear is coaxially connected with the worm.
As an improved scheme, the driven wheel is a gear ring, the flywheel is sleeved in the gear ring, the outer ring of the flywheel is fixedly connected with the gear ring, and the inner ring of the flywheel is coaxially and fixedly connected with the first bevel gear.
As an improved scheme, the worm wheel is coaxially and fixedly connected with a driving shaft, and the driving shaft is connected with the fan blade through a connecting rod.
As an improved scheme, the axes of a plurality of driven wheels are distributed in a rotational symmetry mode along the rotation center of the fan blade.
After the technical scheme is adopted, compared with the prior art, the invention has the following advantages:
the linkage feathering device can realize simultaneous pitch variation of all fan blades and independent pitch variation of a single blade, the two driving modes work independently without influencing each other, and the pitch variation requirements under different working conditions can be met; the linkage device adopts a dual-drive mode to realize dual guarantee of the pitch variation of the wind turbine generator, and even if one drive mode fails, the other drive mode can be adopted to realize the pitch variation, so that the failure probability of feathering shutdown is greatly reduced, and further the occurrence of vicious events such as collapse of the wind turbine generator is prevented.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the flywheel of the present invention;
in the figure: 1-fan blade, 2-driving wheel, 3-driven wheel, 4-rotating shaft, 5-first bevel gear, 6-second bevel gear, 7-driving machine, 8-worm, 9-driving shaft, 10-connecting rod, 11-rotary head and 12-worm wheel; 13-flywheel.
Detailed Description
In order to more clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will now be described with reference to the accompanying drawings.
As shown in fig. 1 and 2, the invention provides a safe feathering device of a wind turbine generator, which comprises a linkage mechanism for simultaneously driving a plurality of fan blades 1 to feather.
And a transfer component for independently driving each fan blade 1 to feather is also arranged on the linkage mechanism.
The linkage mechanism is coaxially provided with a driving wheel 2 along the rotating center of a plurality of fan blades 1, and each blade is also provided with a driven wheel 3 which is used for being driven by the driving wheel 2.
The driving wheel 2 and the driven wheel 3 are both bevel gears, wherein the driving wheel 2 is arranged in a rotating head 11 of the fan unit and can be driven to rotate by an independent driving device, and the rotating direction of the driving wheel is fixed.
And a locking component for positioning the fan blade 1 is further arranged on the linkage mechanism.
The locking part comprises a worm 8 and worm wheel 12 group, the worm 8 of the worm 8 and worm wheel 12 group is in power connection with the driven wheel 3, and the worm wheel 12 of the worm 8 and worm wheel 12 group is in power connection with the fan blade 1.
The transfer part comprises a driving machine 7 and a flywheel 13, the outer ring of the flywheel 13 is coaxially and fixedly connected with the driven wheel 3, the driving machine 7 is in power connection with the worm 8, and the rotating direction of the driving machine is fixed.
The driven wheel 3 drives a rotating shaft 4 through a flywheel 13, the rotating shaft 4 is coaxially and fixedly connected with a first bevel gear 5, the first bevel gear 5 is meshed with a second bevel gear 6, and the second bevel gear 6 is coaxially connected with a worm 8.
The driven wheel 3 is a gear ring, the flywheel 13 is sleeved on the gear ring, the outer ring of the flywheel 13 is fixedly connected with the gear ring, and the inner ring of the flywheel 13 is coaxially and fixedly connected with the first bevel gear 5.
The structure of the flywheel 13 is similar to that of a rear chain wheel of a bicycle, and is a ratchet mechanism, and the flywheel has the characteristic that an outer ring can drive an inner ring to rotate, but the inner ring cannot drive the outer ring to rotate.
The worm wheel 12 is coaxially and fixedly connected with a driving shaft 9, and the driving shaft 9 is connected with the fan blade 1 by a connecting rod 10.
The axes of the driven wheels 3 are rotationally and symmetrically distributed along the rotation center of the fan blade 1.
The working principle of the device is as follows:
under the synchronous driving mode, the driving wheel 2 drives the driven wheels 3 to rotate, the driven wheels 3 are fixedly connected with the outer ring of the flywheel 13 to drive the inner ring of the flywheel 13 to drive the first bevel gear 5 to rotate, the first bevel gear 5 drives the second bevel gear 6 to rotate, the second bevel gear 6 drives the worm 8 to rotate, the worm 8 is meshed with the worm wheel 12, the worm wheel 12 is coaxially and fixedly connected with the driving shaft 9, the driving shaft 9 drives the fan blades 1 to rotate through the connecting rod 10, and the synchronous driving of the fan blades 1 to rotate feathering is realized.
Under the independent driving mode, the driving machine 7 on each fan blade 1 drives the second bevel gear 6 to rotate, the second bevel gear 6 drives the worm 8 to rotate, the worm 8 is meshed with the worm wheel 12, the worm wheel 12 is coaxially and fixedly connected with the driving shaft 9, the driving shaft 9 drives the fan blades 1 to rotate through the connecting rod 10, the rotation feathering of the single fan blade 1 is realized, the second bevel gear 6 can drive the first bevel gear 5 to rotate, the first bevel gear 5 is connected with the inner ring of the flywheel 13, and by utilizing the characteristic of the flywheel 13, the inner ring of the flywheel 13 cannot drive the outer ring of the flywheel 13, so that the flywheel can be separated from the power of the driven.
The fixing modes of the driving shaft 9 and the gears are common in daily life, belong to common knowledge of the skilled in the art, and are not innovative in the scheme, so that the details are not repeated herein.
The foregoing is illustrative of the best mode of the invention and details not described herein are within the common general knowledge of a person of ordinary skill in the art. The scope of the present invention is defined by the appended claims, and any equivalent modifications based on the technical teaching of the present invention are also within the scope of the present invention.
Claims (10)
1. The utility model provides a wind turbine generator system safety feathering device which characterized in that: comprises a linkage mechanism which is used for driving a plurality of fan blades (1) to do feathering action at the same time.
2. The wind turbine generator safety feathering device according to claim 1, characterized in that: and a transfer component for independently driving each fan blade (1) to feather is also arranged on the linkage mechanism.
3. The wind turbine generator safety feathering device according to claim 2, characterized in that: the linkage mechanism comprises a plurality of driving wheels (2) coaxially arranged along the rotating center of the fan blades (1), and each blade is further provided with a driven wheel (3) which is used for being in transmission with the driving wheels (2).
4. The wind turbine generator safety feathering device according to claim 3, characterized in that: and the linkage mechanism is also provided with a locking component for positioning the fan blade (1).
5. The wind turbine generator safety feathering device according to claim 4, characterized in that: the locking part comprises a worm (8) and worm wheel (12) set, the worm (8) of the worm (8) and worm wheel (12) set is in power connection with the driven wheel (3), and the worm wheel (12) of the worm (8) and worm wheel (12) set is in power connection with the fan blade (1).
6. The wind turbine generator safety feathering device according to claim 5, characterized in that: the transfer part comprises a driving machine (7) and a flywheel (13), the outer ring of the flywheel (13) is coaxially and fixedly connected with the driven wheel (3), and the driving machine (7) is in power connection with the worm (8).
7. The wind turbine generator safety feathering device according to claim 6, characterized in that: the driven wheel (3) is in power connection with a first bevel gear (5), a second bevel gear (6) is meshed with the first bevel gear (5), and the second bevel gear (6) is coaxially connected with the worm (8).
8. The wind turbine generator safety feathering device according to claim 7, characterized in that: the driven wheel (3) is a gear ring, the flywheel (13) is sleeved in the gear ring, the outer ring of the flywheel (13) is fixedly connected with the gear ring, and the inner ring of the flywheel (13) is coaxially and fixedly connected with the first bevel gear (5).
9. The wind turbine generator safety feathering device according to claim 5, characterized in that: the worm wheel (12) is coaxially and fixedly connected with a driving shaft (9), and the driving shaft (9) is connected with the fan blade (1) through a connecting rod (10).
10. The wind turbine generator safety feathering device according to claim 3, characterized in that: the axes of the driven wheels (3) are rotationally and symmetrically distributed along the rotation center of the fan blade (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911245373.4A CN110925136A (en) | 2019-12-07 | 2019-12-07 | Safe feathering device of wind turbine generator system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911245373.4A CN110925136A (en) | 2019-12-07 | 2019-12-07 | Safe feathering device of wind turbine generator system |
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| Publication Number | Publication Date |
|---|---|
| CN110925136A true CN110925136A (en) | 2020-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911245373.4A Pending CN110925136A (en) | 2019-12-07 | 2019-12-07 | Safe feathering device of wind turbine generator system |
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| CN (1) | CN110925136A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112576447A (en) * | 2021-01-13 | 2021-03-30 | 杭州川宜影音科技有限公司 | Automatic reversing wind-driven generator |
| WO2022061691A1 (en) * | 2020-09-25 | 2022-03-31 | 刘保伸 | Blade control assembly structure |
| CN116428107A (en) * | 2023-04-19 | 2023-07-14 | 上海玻璃钢研究院东台有限公司 | Wind driven generator blade |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04101074A (en) * | 1990-08-14 | 1992-04-02 | Mitsubishi Heavy Ind Ltd | Windmill |
| CN102322394A (en) * | 2011-09-30 | 2012-01-18 | 东方电气集团东方汽轮机有限公司 | A kind of blower variable-pitch system |
| CN102536653A (en) * | 2012-01-19 | 2012-07-04 | 沈阳工业大学自控技术研究所 | Variable pitch system belonging to independent variable pitch wind generating set and having protection function |
| CN206017052U (en) * | 2016-08-31 | 2017-03-15 | 中船重工(重庆)海装风电设备有限公司 | A kind of synchronous oar paddle change system of wind turbines safety guard that becomes |
| CN110067703A (en) * | 2019-05-28 | 2019-07-30 | 华北电力大学 | The synchronous variable pitch Wind turbines of Worm type and control method |
-
2019
- 2019-12-07 CN CN201911245373.4A patent/CN110925136A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04101074A (en) * | 1990-08-14 | 1992-04-02 | Mitsubishi Heavy Ind Ltd | Windmill |
| CN102322394A (en) * | 2011-09-30 | 2012-01-18 | 东方电气集团东方汽轮机有限公司 | A kind of blower variable-pitch system |
| CN102536653A (en) * | 2012-01-19 | 2012-07-04 | 沈阳工业大学自控技术研究所 | Variable pitch system belonging to independent variable pitch wind generating set and having protection function |
| CN206017052U (en) * | 2016-08-31 | 2017-03-15 | 中船重工(重庆)海装风电设备有限公司 | A kind of synchronous oar paddle change system of wind turbines safety guard that becomes |
| CN110067703A (en) * | 2019-05-28 | 2019-07-30 | 华北电力大学 | The synchronous variable pitch Wind turbines of Worm type and control method |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022061691A1 (en) * | 2020-09-25 | 2022-03-31 | 刘保伸 | Blade control assembly structure |
| CN112576447A (en) * | 2021-01-13 | 2021-03-30 | 杭州川宜影音科技有限公司 | Automatic reversing wind-driven generator |
| CN116428107A (en) * | 2023-04-19 | 2023-07-14 | 上海玻璃钢研究院东台有限公司 | Wind driven generator blade |
| CN116428107B (en) * | 2023-04-19 | 2023-10-20 | 上海玻璃钢研究院东台有限公司 | Wind driven generator blade |
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