CN203702456U - Variable pitch device of middle-size wind power generator - Google Patents
Variable pitch device of middle-size wind power generator Download PDFInfo
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- CN203702456U CN203702456U CN201320834834.3U CN201320834834U CN203702456U CN 203702456 U CN203702456 U CN 203702456U CN 201320834834 U CN201320834834 U CN 201320834834U CN 203702456 U CN203702456 U CN 203702456U
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- Prior art keywords
- variable pitch
- wind turbine
- medium
- turbine vane
- oar
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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 provides a variable pitch device of a middle-size wind power generator. The variable pitch device comprises a wheel hub, an engine room, a hollow main shaft, a variable pitch motor, a variable pitch controller, a slide ring, a proximity switch and an extreme limiting device, wherein the hollow main shaft is used for connecting the wheel hub with the engine room. The variable pitch motor is arranged on the wheel hub and one variable pitch motor drives one blade. The variable pitch controller is arranged in the engine room; one variable pitch controller independently controls one variable pitch motor. The slide ring is arranged in the hollow main shaft and is electrically connected with the variable pitch motor and the variable pitch controller. The proximity switch is arranged on the variable pitch motor, is electrically connected with the slide ring and is used for outputting an angle route pulse of the variable pitch motor to the variable pitch controller. The extreme limiting device is arranged on a connection flange of a variable pitch bearing and is used for inducing an initial angle by the variable pitch controller in an initializing process so that an accurate positioning capability is realized. According to the variable pitch device, the extreme limiting device is arranged so as to realize an angle closed loop and greatly reduce the quantity of electric contacts between variable pitch equipment in the wheel hub and the slide ring.
Description
Technical field
The utility model relates to medium-sized wind-powered electricity generation field, and is particularly related to a kind of medium-sized wind turbine vane change device.
Background technique
As shown in Figure 1, large-scale wind electricity machine vane change device is a kind of independent driving system based on speed and angle double circle structure.The volume ratio of this class generator vane change device is huger, and the enough attendants of volume of wheel hub enter wheel hub inner chamber evolutionary operation, so whole component of pitch-controlled system are placed in wheel hub.Like this, for realizing the incremental encoder of speed closed loop and for realizing the absolute value encoder that is arranged on vane drive gear end of angular orientation closed loop, can directly laying conjunction cable and be connected with change oar controller, guarantee the reliability being electrically connected.
And in medium-sized wind turbine vane change device (rated power is at 20-500kW range section), wheel hub volume can only put down and become oar motor part.Become oar controller and back-up power and can only be placed in cabin, by the electric connection of the conjunction cable in hollow main shaft and slip ring realization and wheel hub internal unit.Count the restriction of the reliability of quantitative limitation and the transmission to multichannel pulse digital signal owing to being subject to the electric contact of slip ring, become the demands that oar controller is placed on medium-sized wind turbine vane change device in cabin and is generally difficult to reach the two closed loops of the many covers of transmission simultaneously, be difficult to realize a change oar controller and independently control the function of a change oar motor.So medium-sized wind-powered electricity generation unit is generally just installed a set of vane change device in cabin, by three blades in the mechanical linkage while drive hub of hollow spindle inside, as shown in Figure 2.This class formation greatly reduces the requirement to wheel hub cavity volume.But because only have a set of change oar control gear, once break down, all blades all cannot move, and very easily cause catastrophic effect.
Model utility content
The utility model cannot be realized a change oar controller and independently control the problem of a change oar motor in order to overcome existing medium-sized wind turbine unit, a kind of medium-sized wind turbine vane change device is provided.
To achieve these goals, the utility model provides a kind of medium-sized wind turbine vane change device, comprises wheel hub, cabin, hollow main shaft, change oar motor, becomes oar controller, slip ring, approach switch and limit snubber.Hollow main shaft connects wheel hub and cabin.Become oar motor and be arranged at wheel hub, and blade of a change oar motor drive.Become oar controller and be arranged at cabin, a change oar controller is independently controlled a change oar motor.Slip ring is arranged at hollow main shaft, is electrically connected and becomes oar motor and become oar controller.Approach switch is arranged at and becomes oar motor, is electrically connected slip ring, for the angular travel pulse signal to becoming oar controller output change oar motor.Limit snubber is arranged on pitch variable bearings adpting flange, becomes oar controller perception initial angle in order to allow when the initialization, makes it possess accurate stationkeeping ability.
In the utility model one embodiment, become on oar motor and be provided with and become oar motor speed reducer one to one, retarder is arranged at wheel hub.
In the utility model one embodiment, on the pitch variable bearings of connection wheel hub and blade, be also provided with at least one limit switch.
In the utility model one embodiment, on the pitch variable bearings of connection wheel hub and blade, be also provided with 0 degree and two limit switches of 90 degree, for providing redundant position signal to these two emphasis blade angles.
In the utility model one embodiment, medium-sized wind turbine vane change device also comprises at least one back-up power, and back-up power is arranged at described cabin.
In the utility model one embodiment, become oar controller and comprise frequency variator, frequency variator has torque amplitude limit function, can in the time of stall, maintain driving torque.
In the utility model one embodiment, medium-sized wind turbine vane change device also comprises main control unit, is electrically connected and becomes oar controller.
In the utility model one embodiment, medium-sized wind turbine vane change device also comprises communication interface, becomes oar controller and is electrically connected by communication interface and main control unit.
In the utility model one embodiment, medium-sized wind turbine vane change device also comprises theft-resistant link chain, when theft-resistant link chain occurs that blade angle is all unconditionally got back to feathering angle extremely.
In sum, the utility model compared with prior art, has the following advantages: change oar motor is arranged to wheel hub, becomes oar controller and be arranged at cabin, realize electric connection between the two by the slip ring that is positioned at hollow main shaft.Approach switch is set and realizes the speed closed loop that becomes oar motor, greatly reduced the electric contact quantity between change oarage and the slip ring in wheel hub.By limit snubber is set, become oar controller and become oar motor by judgement and whether be blocked to transfer and realize angle closed loop.Compared with traditional employing absolute value encoder, adopt limit snubber to realize angle closed loop and greatly reduced the electric contact quantity between change oarage and the slip ring in wheel hub.Reduced the slip ring electric contact quantity that speed closed loop and angle closed loop are used, configurable multiple change oar controllers in cabin, realize the technique effect of a change oar motor of a change oar controller drive.
In addition,, by retarder is set, it can will become the needed speed of vane propeller-changing of being down at a high speed of oar motor output.By limit switch is set, it can detect the redundant position signal at blade emphasis blade angle place, realizes the accuracy of angle closed loop control.By back-up power is set, in the time that power supply network breaks down, back-up power will drive vane change device to realize safe feathering.By the frequency variator with torque amplitude limit function being set in change oar controller, it can maintain driving torque in the time of stall, prevents frequency variator tripping operation.By main control unit is set, it can unify to control multiple change oar controllers, prevents from becoming oar controller and occurs controlling phenomenon by mistake, further improves control accuracy.By theft-resistant link chain is set, it can effectively protect the working condition safety of the each link of vane change device.
For above-mentioned and other objects, features and advantages of the present utility model can be become apparent, preferred embodiment cited below particularly, and coordinate accompanying drawing, be described in detail below.
Accompanying drawing explanation
Figure 1 shows that the theory diagram of existing large-scale wind electricity machine vane change device.
Figure 2 shows that the theory diagram of existing medium-sized wind turbine vane change device.
Figure 3 shows that the theory diagram of the medium-sized wind turbine vane change device that the utility model one embodiment provides.
Embodiment
As shown in Figure 1, the medium-sized wind turbine vane change device that the utility model provides comprises wheel hub 1, cabin 2, hollow main shaft 3, becomes oar motor 4, becomes oar controller 5, slip ring 6, approach switch 7 and limit snubber 8.Hollow main shaft 3 connects wheel hub 1 and cabin 2.Become oar motor 4 and be arranged at wheel hub 1, and blade of change oar motor 4 drive.Become oar controller 5 and be arranged at a change oar motor 4 of 2, one, cabin change oar controller, 5 independent controls.Slip ring 6 is arranged at hollow main shaft 3, is electrically connected and becomes oar motor 4 and become oar controller 5.Approach switch 7 is arranged at and becomes oar motor 4, is electrically connected slip ring 6, for the angular travel pulse signal to becoming oar controller 5 output change oar motors 4.Limit snubber 8 is arranged on pitch variable bearings adpting flange, becomes oar controller perception initial angle in order to allow when the initialization, makes it possess accurate stationkeeping ability.
Existing medium-sized wind turbine vane change device is because being subject to the restriction of wheel hub 1 inner volume, and the change oar controller 5 that becomes oar motor 4 and this change oar motor 4 of drive can not be arranged in wheel hub 1 simultaneously.Become oar controller 5 if change oar motor 4 is placed in wheel hub 1 and be placed in cabin 2, owing to being subject to the power on restriction of number of contacts and the reliability to the transmission of multichannel pulse digital signal of slip ring 6, be difficult to reach the demands of the two closed loops of the many covers of transmission simultaneously.The medium-sized wind turbine vane change device that the utility model provides arranges approach switch 7 on change oar motor 4, and approach switch 7 outputs become the angular travel pulse signal of oar motors 4, and this pulse signal is sent to and becomes oar controller 5 through slip ring 6, realize speed closed loop.Compared with traditional employing incremental encoder, adopt approach switch 7 to realize speed closed loop and greatly reduced the electric contact quantity between change oarage and the slip ring 6 in wheel hub 1.
For angle closed loop, in large-scale wind electricity machine vane change device, adopt absolute position encoder to realize.And the medium-sized wind turbine vane change device that the utility model provides is realized by limit snubber 8 is set on pitch variable bearings adpting flange.In the present embodiment, limit snubber 8 is arranged on blade angle 93 degree places, in the power-up initializing process of pitch-controlled system, becomes oar controller 5 and becomes oar with 3 degree feathering speed driving blade per second along feathering direction, until it is spacing to arrive the 93 degree limit, pitch motor is by stall.Become oar controller 5 and judge after blade stall, current vane angle is made as to the initial vane angle of the limit (93 degree), complete initialization.This method has been omitted absolute value encoder, has not only simplified the structure of vane change device, the change oarage in minimizing wheel hub 1 and the electric contact quantity of slip ring 6.In the time of initialization, become oar controller 5 energy perception initial angles simultaneously, make it possess accurate stationkeeping ability, guaranteed the reliability of vane change device.But the utility model is not limited in any way this.In other embodiment, limit snubber 8 can be arranged on different blade angle positions.
The medium-sized wind turbine vane change device that the utility model provides, by approach switch 7 and limit snubber 8 are set, greatly reduces the electric contact quantity between change oarage and the slip ring 6 in wheel hub 1.Therefore, in cabin 2, multiple change oar controllers 5 can be set, realize a change oar motor 4 of a change oar controller 5 independent controls.In the time that wherein any one group of change oar drive system being made up of a change oar controller 5 and change oar motor 4 breaks down, other group becomes oar drive system and can drive rest blade normally to work, and guarantees vane change device working stability.In the present embodiment, the quantity of blade is 3, and therefore, the quantity that becomes oar motor 4 and change oar controller 5 is also three.But the utility model is not limited in any way this.In other embodiment, become oar motor 4 identical with the quantity of blade with the quantity that becomes oar controller 5.
In the present embodiment, become and on oar motor 4, be provided with and become oar motor 4 and reach speed reducer 9 one to one, retarder 9 is arranged at wheel hub 1.The required speed of vane propeller-changing that is converted at a high speed that retarder 9 can be exported change oar motor 4.By retarder 9 is set, not only can accurately control and become oar speed, also greatly increase the type selecting scope that becomes oar motor 4 simultaneously.
In the present embodiment, on the pitch variable bearings that connects wheel hub 1 and blade, be provided with 0 degree and two limit switches 10 of 90 degree.Limit switch 10 can detect the redundant position signal of blade at 0 degree and 90 degree places, and this position signal is passed to and becomes oar controller 5 through slip ring 6.In the time that limit snubber 8 breaks down, the position signal that becoming oar controller 5 can provide by limit switch 10 is realized positioning control, further improves validity and the reliability of angle closed loop control.In the present embodiment, because blade quantity is three, corresponding pitch variable bearings also has three, is provided with 0 degree and two limit switches 10 of 90 degree on each pitch variable bearings.But the utility model is not limited in any way this.
In the present embodiment, become oar controller 5 and comprise frequency variator 51.Frequency variator 51 has torque amplitude limit function, and it can, in the time of stall, maintain driving torque, prevents that frequency variator 51 from tripping.
In the present embodiment, medium-sized wind turbine vane change device also comprises main control unit 11, and main control unit 11 is electrically connected three change oar controllers 5 by communication interface 14.Main control unit 11 unifications are controlled three change oar controllers 5 and are regularly carried out data communication with change oar controller 5, prevent from becoming oar controller 5 and occur controlling phenomenon by mistake, further improve control accuracy.
In the present embodiment, be the working condition safety of effective each link of protective system, medium-sized wind turbine vane change device also comprises theft-resistant link chain 12.Theft-resistant link chain 12 is that the fault point that may cause serious harm in medium-sized wind turbine vane change device is connected into a loop.The fault point causing serious harm comprises the output point of various emergency stop buttons and overspeed detection device.Once there is action above-mentioned fault point, will cause that theft-resistant link chain 12 is abnormal, as faults such as power-off, the back-up power 13 that is positioned at cabin 2 is enabled, and blade angle is all unconditionally got back to feathering angle, realizes safety along slurry.
In sum, change oar motor 4 is arranged to wheel hub 1, becomes oar controller 5 and be arranged at cabin 2, realize electric connection by the slip ring 6 that is positioned at hollow main shaft 3 between the two.Approach switch 7 is set and realizes the speed closed loop that becomes oar motor 4, greatly reduced the electric contact quantity between change oarage and the slip ring 6 in wheel hub 1.By limit snubber 8 is set, become oar controller 5 and become oar motor 4 by judgement and whether be blocked to transfer and realize angle closed loop.Compared with traditional employing absolute value encoder, adopt limit snubber 8 to realize angle closed loop and greatly reduced the electric contact quantity between change oarage and the slip ring 6 in wheel hub 1.Reduced the slip ring 6 electric contact quantity that speed closed loop and angle closed loop are used, the interior configurable multiple change oar controllers 5 in cabin 2, realize the technique effect of a change oar motor 4 of change oar controller 5 drive.
In addition, by retarder 9 is set, the needed speed of vane propeller-changing of being down at a high speed that it can be exported change oar motor 4.By limit switch 10 is set, it can detect the redundant position signal of blade emphasis change oar position, realizes the accuracy of angle closed loop control.By back-up power 13 is set, in the time that power supply network breaks down, back-up power 13 will drive vane change device to realize safe feathering.By have the frequency variator 51 of torque amplitude limit function in the 5 interior settings of change oar controller, it can maintain driving torque in the time of stall, prevents that frequency variator 51 from tripping.By main control unit 11 is set, it can unify to control multiple change oar controllers 5, prevents from becoming oar controller 5 and occurs controlling phenomenon by mistake, further improves control accuracy.By theft-resistant link chain 12 is set, it can effectively protect the working condition safety of the each link of vane change device.
Although the utility model is disclosed as above by preferred embodiment; but not in order to limit the utility model; anyly know this skill person; not departing from spirit and scope of the present utility model; can do a little change and retouching, therefore protection domain of the present utility model is when being as the criterion depending on claims scope required for protection.
Claims (9)
1. a medium-sized wind turbine vane change device, is characterized in that, comprising:
Wheel hub;
Cabin;
Hollow main shaft, connects described wheel hub and cabin;
Become oar motor, be arranged at described wheel hub, and blade of a change oar motor drive;
Become oar controller, be arranged at described cabin, change oar motor of a change oar controller drive;
Slip ring, is arranged at described hollow main shaft, is electrically connected described change oar motor and becomes oar controller;
Approach switch, is arranged at described change oar motor, is electrically connected described slip ring, for become the angular travel pulse signal of oar motor to described change oar controller output;
Limit snubber, is arranged on pitch variable bearings adpting flange, in order to allow described change oar controller perception initial angle when the initialization, makes it possess accurate stationkeeping ability.
2. medium-sized wind turbine vane change device according to claim 1, is characterized in that, is provided with and described change oar motor retarder one to one on described change oar motor, and described retarder is arranged at described wheel hub.
3. medium-sized wind turbine vane change device according to claim 1, is characterized in that, on the pitch variable bearings of connection wheel hub and blade, is also provided with at least one limit switch.
4. medium-sized wind turbine vane change device according to claim 3, is characterized in that, is also provided with 0 degree and two limit switches of 90 degree, for providing redundant position signal to these two emphasis blade angles on the pitch variable bearings of described connection wheel hub and blade.
5. medium-sized wind turbine vane change device according to claim 1, is characterized in that, described medium-sized wind turbine vane change device also comprises at least one back-up power, and described back-up power is arranged at described cabin.
6. medium-sized wind turbine vane change device according to claim 1, is characterized in that, described change oar controller comprises frequency variator, and described frequency variator has torque amplitude limit function, maintains driving torque in the time of stall.
7. medium-sized wind turbine vane change device according to claim 1, is characterized in that, described medium-sized wind turbine vane change device also comprises main control unit, is electrically connected described change oar controller.
8. medium-sized wind turbine vane change device according to claim 7, is characterized in that, described medium-sized wind turbine vane change device also comprises communication interface, and described change oar controller is electrically connected by communication interface and described main control unit.
9. medium-sized wind turbine vane change device according to claim 1, is characterized in that, described medium-sized wind turbine vane change device also comprises theft-resistant link chain, when described theft-resistant link chain occurs that blade angle is all unconditionally got back to feathering angle extremely.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320834834.3U CN203702456U (en) | 2013-12-16 | 2013-12-16 | Variable pitch device of middle-size wind power generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320834834.3U CN203702456U (en) | 2013-12-16 | 2013-12-16 | Variable pitch device of middle-size wind power generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203702456U true CN203702456U (en) | 2014-07-09 |
Family
ID=51052908
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320834834.3U Expired - Fee Related CN203702456U (en) | 2013-12-16 | 2013-12-16 | Variable pitch device of middle-size wind power generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203702456U (en) |
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2013
- 2013-12-16 CN CN201320834834.3U patent/CN203702456U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140709 Termination date: 20141216 |
|
| EXPY | Termination of patent right or utility model |