CN111197553A - Fan blade safety control system - Google Patents
Fan blade safety control system Download PDFInfo
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- CN111197553A CN111197553A CN201811377756.2A CN201811377756A CN111197553A CN 111197553 A CN111197553 A CN 111197553A CN 201811377756 A CN201811377756 A CN 201811377756A CN 111197553 A CN111197553 A CN 111197553A
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- fan
- distance sensor
- fan blade
- distance
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- 238000012544 monitoring process Methods 0.000 claims abstract description 23
- 230000003287 optical effect Effects 0.000 claims description 7
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 6
- 238000005034 decoration Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000004807 localization Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000002366 time-of-flight method 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
- F03D7/0264—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor for stopping; controlling in emergency situations
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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
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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
- F05B2270/80—Devices generating input signals, e.g. transducers, sensors, cameras or strain gauges
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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)
- Control Of Positive-Displacement Air Blowers (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The application provides a fan blade safety control system includes: a distance sensor and a processor; the distance sensor is arranged on a cylindrical surface on the fan upright post, the monitoring direction of the distance sensor is intersected with the rotating path of the free end of the fan blade, the included angle between the monitoring direction of the distance sensor and the rotating direction of the fan blade when the fan blade rotates to the lowest point is an obtuse angle, and the distance sensor is used for detecting the distance value between the free end of the fan blade and the fan upright post; the processor is used for comparing the distance value output by the distance sensor with a preset minimum distance value, and if the distance value output by the distance sensor is smaller than the minimum distance value, the controller outputs a safety command to enable the controller to control the fan to stop rotating or adjust the pitching angle of the main cabin connected with the fan blade, so that the fan blade is far away from the fan upright post, the early warning time is prolonged, the fan has enough time to brake or adjust the angle of the fan blade, and the fan blade is prevented from colliding with the fan upright post.
Description
Technical Field
The application relates to the technical field of wind power, in particular to a fan blade safety control system.
Background
With the rapid development of social economy, the demand of people for energy is also rapidly increasing. However, since the use of fossil energy as non-renewable energy is limited to a certain extent due to environmental factors such as carbon emission and the increasing consumption of storage, other clean and pollution-free renewable energy sources are actively sought to replace the conventional fossil energy sources.
Wind energy, solar energy and other clean energy sources are increasingly paid more and more attention by people, and particularly, the localization degree of wind turbine generators is gradually improved in recent years due to the strong support of national policies. With the development of the wind power industry, more and more wind farms are built in mountainous areas with complex terrains, and even on the sea. The wind direction in mountain areas or on the sea is unstable, and wind power can make the blade produce great deformation when great, hits the fan stand even, leads to the blade to damage or break, causes the fan inefficacy, influences unit life-span and operation safety, reduces the generating efficiency.
Disclosure of Invention
The application provides a fan blade safety control system to solve the problem that the safety of fan blades in the running process of a fan cannot be guaranteed in the prior art. The technical scheme adopted by the application is as follows:
the application provides a fan blade safety control system includes: a distance sensor, a processor;
the distance sensor is arranged on a cylindrical surface on the fan upright post, the monitoring direction of the distance sensor is intersected with the rotating path of the free end of the fan blade, the included angle between the monitoring direction of the distance sensor and the rotating direction of the fan blade when the fan blade rotates to the lowest point is an obtuse angle, and the distance sensor is used for detecting the distance value between the free end of the fan blade and the fan upright post;
the processor is used for comparing the distance value output by the distance sensor with a preset minimum distance value, and if the distance value output by the distance sensor is smaller than the minimum distance value, a safety command is output to the controller, so that the controller controls the fan to stop rotating or adjusts the pitch angle of a main cabin connected with the fan blades, and the fan blades are far away from the fan upright posts.
Optionally, the distance sensors are circumferentially arranged on the cylindrical surface of the fan column in a circumferential array.
Optionally, the monitoring direction of the distance sensor is parallel to the cross section of the fan column.
Optionally, the distance sensor is one of an optical distance sensor, an ultrasonic distance sensor, a radio frequency sensor, or a magnetic sensitive distance sensor.
Optionally, the wind direction measuring device further comprises a wind direction sensor, wherein the wind direction sensor is used for measuring the wind direction at the position of the fan;
the processor is further used for outputting an angle adjusting instruction according to the wind direction measured by the wind direction sensor so as to adjust the pitching angle and/or the horizontal deflection angle of the main cabin.
Compared with the prior art, the fan blade safety control system provided by the embodiment of the application has the following beneficial effects at least: the distance sensor arranged on the fan stand column is used for measuring the distance value between the lowest point of the fan blade and the fan stand column, and the pitching angle of the main cabin is adjusted according to the distance value so as to change the angle between the fan blade and the fan stand column, change the distance between the lowest point of the fan blade and the fan stand column and avoid the collision between the fan blade and the fan stand column.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings used in the description of the embodiments of the present application will be briefly described below.
Fig. 1 is a schematic structural diagram of a fan blade safety control system according to an embodiment of the present application;
FIG. 2a is a side view of an installed position of a fan blade safety control system according to an embodiment of the present application;
FIG. 2b is a front view of an installed position of a fan blade safety control system according to an embodiment of the present application;
FIG. 3 is a schematic view of a large deformation of a fan blade under the action of wind;
FIG. 4 is a schematic view of the position of the fan blades after adjusting the pitch angle of the main nacelle;
FIG. 5 is a schematic diagram of an arrangement of distance sensors according to an embodiment of the present disclosure;
fig. 6 is a schematic view of the arrangement of distance sensors at the cross-sectional view angle of the fan column.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. As used herein, the term "and/or" includes all or any element and all combinations of one or more of the associated listed items.
The following describes the technical solutions of the present application and how to solve the above technical problems with specific embodiments. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments. Embodiments of the present application will be described below with reference to the accompanying drawings.
As shown in fig. 1, an embodiment of the present application provides a fan blade safety control system 10, including: a distance sensor 11 and a processor 12.
As shown in fig. 2a, the distance sensor 11 is disposed on the cylindrical surface of the fan upright 21, the rotation path of the free end 221 of the fan blade is a circumference, the monitoring direction of the distance sensor 11 intersects with the rotation path of the free end 221 of the fan blade 22, and an included angle between the monitoring direction of the distance sensor 11 and the rotation direction when the fan blade 22 rotates to the lowest point is an obtuse angle, that is, before the fan blade 22 rotates to the lowest point, the distance sensor 11 can detect the distance value L between the free end of the fan blade 22 and the fan upright 21. The rotation direction of the fan blade 22 is a tangential direction of the rotation path of the free end 221 of the fan blade. Fig. 2b is a front view corresponding to fig. 2a, in fig. 2b, the rotation direction of the fan blade 22 is counterclockwise, and when the monitoring direction of the distance sensor 11 intersects with the rotation path of the free end 221 of the fan blade 22 at the monitoring point a, that is, the fan blade 22 rotates to the point a before the lowest point, the distance sensor 11 can detect the distance value L between the free end 221 of the fan blade 22 and the fan column 21. Setting the monitoring point before the lowest point of the fan blade 22 in the rotation process can prolong the early warning time so that the fan has enough time to brake or adjust the angle of the fan blade 22.
The main cabin 23 contains a gear box, a motor, a controller 25, a cable, a rotating shaft 24, a fan pitch angle adjusting device, a fan horizontal angle adjusting device and the like, one end of the rotating shaft 24 extends out of the main cabin 21 and is fixedly connected with the fan blades 22, and the motor and the gear box in the main cabin 23 output torque through the rotating shaft 24 and drive the fan blades 22 to rotate. The controller 25 may control the blower to perform a braking operation, and even if the blower stops rotating, the controller 25 may also control the blower pitch angle adjusting means and the blower horizontal angle adjusting means to adjust the pitch angle and the horizontal yaw angle of the blower.
The processor 12 compares the distance value output from the distance sensor 11 with a preset minimum distance value, and outputs a safety command to the controller 25 if the distance value output from the distance sensor 11 is smaller than the preset minimum distance value. After the controller 25 receives the safety command, there are two processing modes to avoid the fan blade 22 colliding with the fan column 21: the first mode is that the fan is controlled to stop rotating, and the fan blade 22 is stopped before the fan blade 22 collides with the fan upright post 21; the second way is to adjust the pitch angle of the main nacelle 23 by the fan pitch angle adjusting device so that the fan blade 22 is away from the fan column, and the fan blade 22 is prevented from colliding with the fan column 21 during the rotation process.
As shown in fig. 3, when the wind force is large and the wind direction blows obliquely downward, the fan blade 22 is greatly deformed and approaches the fan column 21, the distance sensor 11 measures the distance between the free end of the fan blade 22 and the fan column 21 when the fan blade 22 rotates to the monitoring point, and when the processor 12 detects that the distance value output by the distance sensor 11 is smaller than the preset minimum distance value, the safety command is output to the controller 25. The controller 25 outputs a pitch angle adjusting instruction to the fan pitch angle adjusting device 13, and the fan pitch angle adjusting device 13 adjusts the pitch angle a of the main cabin 23 according to the pitch angle adjusting instruction, so that the side of the main cabin 23 extending out of the rotating shaft 24 tilts upward, the free end 221 of the fan blade 22 is away from the fan column 21, collision between the fan blade 22 and the fan column 21 is avoided, and the adjusted positions of the fan blade 22 and the main cabin 23 are shown in fig. 4.
Further, the processor 12 may also calculate a pitch angle value that the fan needs to adjust according to the measured distance value L, and send the calculated pitch angle value to the controller 25, and the controller 25 controls the pitch angle adjusting device 13 to adjust the pitch angle according to the pitch angle value.
In the fan blade safety control system 10 of the embodiment, the distance value between the free end of the fan blade and the fan column is measured by the distance sensor arranged on the fan column, the pitch angle of the main cabin is adjusted or the fan is controlled to stop rotating according to the distance value, so that the fan blade is prevented from colliding with the fan column, and the monitoring point is arranged before the lowest point of the fan blade 22 in the rotating process, so that the early warning time can be prolonged, and the fan has enough time to brake or adjust the angle of the fan blade 22.
Further, as shown in fig. 5, a plurality of distance sensors 11 are circumferentially arranged on the cylindrical surface of the fan column 21. Referring specifically to fig. 6, which shows the arrangement of the distance sensors 11 in the cross-sectional view of the fan column 21, the arrow direction in fig. 6 represents the monitoring direction of each distance sensor, so as to monitor the distance between the free end 221 of the fan blade 22 and the fan column when the main cabin 23 is at different horizontal deflection angles. Therefore, when the fan blade 22 is adjusted to any horizontal deflection angle, a plurality of distance sensors can be aligned with the fan blade 22. It should be noted that the monitoring range of each distance sensor is a cone, which ensures that the fan blade 22, even if deformed by wind, can pass through the monitoring range of the distance sensor 11 during rotation, in order to trigger the distance sensor 11. Through the circumferential array arrangement shown in fig. 6, as long as a sufficient number of distance sensors 11 are arranged, all possible orientations of the free end 221 of the fan blade 22 can be covered, and the distance between the free end 221 of the fan blade 22 and the fan column 21 can be monitored when the fan rotates to any horizontal deflection angle.
Further, the monitoring direction of the distance sensor 11 is parallel to the cross section of the fan column 21. Of course, it is also possible to set the monitoring direction of the distance sensor 11 to form a certain angle with the cross section of the fan column 21, i.e. the monitoring direction of the distance sensor 11 is inclined upwards or downwards. It should be noted that, regardless of the angle, it is ensured that the fan blade 22 can pass through the monitoring range of the distance sensor 11 during the rotation process to trigger the distance sensor 11.
Alternatively, the distance sensor 11 may be any one of an optical distance sensor, an ultrasonic distance sensor, a radio frequency sensor, or a magnetic-sensitive distance sensor.
The optical distance sensor measures the distance by using a time-of-flight method (flying time), emits a light pulse, measures the time from the emission of the light pulse to the reflection of the light pulse by an object, and calculates the distance between the optical distance sensor and the object through a time interval. In addition, some optical distance sensors detect a distance by detecting a phase difference between emitted light and reflected light propagating in a space, and the accuracy is high, and the distance is generally in the order of millimeters. The optical distance sensor emits light pulses with a certain radiation angle to enlarge the monitoring range.
The ultrasonic distance sensor calculates the distance to an object by emitting an ultrasonic wave and by measuring the time from the emission of the ultrasonic wave to the reflection of the ultrasonic wave by the object.
The radio frequency sensor may be a radio frequency radar and calculates the distance to the object by measuring the time the transmitted radio frequency signal has been reflected back by the object from transmission.
The magneto-sensitive distance sensor is a sensor that converts a magneto-physical quantity into an electric signal by a magneto-electric action using a semiconductor magneto-sensitive element. The magnetosensitive distance sensor can be divided into two categories, namely a body type and a junction type, according to the structure, wherein the magnetosensitive distance sensor comprises a Hall element and a magnetosensitive resistor, and the magnetosensitive distance sensor comprises a magnetosensitive diode, a magnetosensitive triode and the like.
Optionally, the fan blade safety control system 10 of the present embodiment further includes a wind direction sensor, and the wind direction sensor is used for measuring the wind direction at the position of the fan. The wind direction sensor is a physical device which detects and senses external wind direction information by the rotation of a wind direction arrow, transmits the wind direction information to the coaxial code disc and outputs a relevant numerical value corresponding to the wind direction. The wind direction sensor can measure the near-earth wind direction in the outdoor environment and can be divided into a photoelectric type, a voltage type, a compass type and the like according to the working principle.
Accordingly, the processor 12 is further configured to output an angle adjustment instruction according to the wind direction measured by the wind direction sensor to adjust the pitch angle and/or the horizontal yaw angle of the main cabin 23.
As the fan has the highest power generation efficiency when the fan blades face the wind direction, the wind direction is monitored through the wind direction sensor, and the horizontal deflection angle and the pitching angle of the main cabin 23 are adjusted, so that the fan blades face the wind direction.
The foregoing is only a partial embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and decorations can be made without departing from the principle of the present application, and these modifications and decorations should also be regarded as the protection scope of the present application.
Claims (5)
1. A fan blade safety control system, comprising: a distance sensor and a processor;
the distance sensor is arranged on a cylindrical surface on the fan upright post, the monitoring direction of the distance sensor is intersected with the rotating path of the free end of the fan blade, the included angle between the monitoring direction of the distance sensor and the rotating direction of the fan blade when the fan blade rotates to the lowest point is an obtuse angle, and the distance sensor is used for detecting the distance value between the free end of the fan blade and the fan upright post;
the processor is used for comparing the distance value output by the distance sensor with a preset minimum distance value, and if the distance value output by the distance sensor is smaller than the minimum distance value, a safety command is output to the controller, so that the controller controls the fan to stop rotating or adjusts the pitch angle of a main cabin connected with the fan blades, and the fan blades are far away from the fan upright posts.
2. The system of claim 1, wherein a plurality of the distance sensors are arranged in a circumferential array around a cylindrical surface of the fan column.
3. The system of claim 1, wherein a monitoring direction of the distance sensor is parallel to a cross-section of the fan column.
4. The system of any one of claims 1 to 3, wherein the distance sensor is one of an optical distance sensor, an ultrasonic distance sensor, a radio frequency sensor, or a magnetically sensitive distance sensor.
5. The system of any one of claims 1 to 3, further comprising a wind direction sensor for measuring a wind direction at a location of the fan;
the processor is further used for outputting an angle adjusting instruction according to the wind direction measured by the wind direction sensor so as to adjust the pitching angle and/or the horizontal deflection angle of the main cabin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811377756.2A CN111197553A (en) | 2018-11-19 | 2018-11-19 | Fan blade safety control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811377756.2A CN111197553A (en) | 2018-11-19 | 2018-11-19 | Fan blade safety control system |
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| Publication Number | Publication Date |
|---|---|
| CN111197553A true CN111197553A (en) | 2020-05-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811377756.2A Pending CN111197553A (en) | 2018-11-19 | 2018-11-19 | Fan blade safety control system |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040057828A1 (en) * | 2002-09-23 | 2004-03-25 | Bosche John Vanden | Wind turbine blade deflection control system |
| US20070102939A1 (en) * | 2005-10-10 | 2007-05-10 | Matthias Stommel | Method for operation of a wind energy installation |
| CN101813055A (en) * | 2010-05-11 | 2010-08-25 | 无锡风电设计研究院有限公司 | Wind driven generator with blade-tip deflection detection |
| EP2511523A1 (en) * | 2011-04-11 | 2012-10-17 | Baumer Innotec AG | Wind turbine with device for measuring the distance between the rotor blade and tower and method for measuring distance thereof |
| CN203519144U (en) * | 2013-08-12 | 2014-04-02 | 国电联合动力技术有限公司 | Aerogenerator blade and tower-barrel state monitoring system |
| CN106091941A (en) * | 2016-06-21 | 2016-11-09 | 远景能源（江苏）有限公司 | The measuring method of blade tip of wind driven generator tower headroom |
-
2018
- 2018-11-19 CN CN201811377756.2A patent/CN111197553A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040057828A1 (en) * | 2002-09-23 | 2004-03-25 | Bosche John Vanden | Wind turbine blade deflection control system |
| US20070102939A1 (en) * | 2005-10-10 | 2007-05-10 | Matthias Stommel | Method for operation of a wind energy installation |
| CN101813055A (en) * | 2010-05-11 | 2010-08-25 | 无锡风电设计研究院有限公司 | Wind driven generator with blade-tip deflection detection |
| EP2511523A1 (en) * | 2011-04-11 | 2012-10-17 | Baumer Innotec AG | Wind turbine with device for measuring the distance between the rotor blade and tower and method for measuring distance thereof |
| CN203519144U (en) * | 2013-08-12 | 2014-04-02 | 国电联合动力技术有限公司 | Aerogenerator blade and tower-barrel state monitoring system |
| CN106091941A (en) * | 2016-06-21 | 2016-11-09 | 远景能源（江苏）有限公司 | The measuring method of blade tip of wind driven generator tower headroom |
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Application publication date: 20200526 |
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