CN114199167A - Blade clearance monitoring system based on millimeter waves - Google Patents
Blade clearance monitoring system based on millimeter waves Download PDFInfo
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- CN114199167A CN114199167A CN202111366217.0A CN202111366217A CN114199167A CN 114199167 A CN114199167 A CN 114199167A CN 202111366217 A CN202111366217 A CN 202111366217A CN 114199167 A CN114199167 A CN 114199167A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B15/00—Measuring arrangements characterised by the use of electromagnetic waves or particle radiation, e.g. by the use of microwaves, X-rays, gamma rays or electrons
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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
- F03D17/00—Monitoring or testing of wind motors, e.g. diagnostics
Abstract
The invention provides a millimeter wave-based blade clearance monitoring system which comprises a millimeter wave sensor, a mounting bracket, an intelligent controller and a main control computer, wherein the millimeter wave sensor is mounted on the mounting bracket and multi-directionally adjusts the position through the mounting bracket; the mounting bracket is fixed on the sliding block of the sliding rail and connected with a driving motor, the driving motor is connected with an intelligent controller, and the mounting height of the millimeter wave sensor is consistent with the height of the blade when the theoretical deformation reaches the minimum clearance value. The dynamic real-time fault-tolerant monitoring of the blade clearance is realized, the influence of severe working conditions such as rain, fog and dust is avoided, and the dynamic fault-tolerant monitoring system has the advantages of high reliability and high precision.
Description
Technical Field
The invention relates to the technical field of blade monitoring of wind generating sets, in particular to a millimeter wave-based blade clearance monitoring system.
Background
The wind generating set is used as an important part of new energy, the development speed is rapid, particularly with the application of wind resources in low wind areas, the rapid development of offshore wind generating sets and the continuous increase of unit capacity, the diameter of an impeller is continuously increased, blades are also continuously lengthened, and the hidden danger of the blades is also increased. Under different wind load conditions, the blade has the conditions of shimmy and torsion, and the deformation of the blade is increased along with the increase of the size of the blade, namely the variation of the rotating curved surface under the action of the wind load is larger. The problem is theoretically avoided through cone angle setting in the process of blade production and the design process, however, in view of the change of different wind conditions, the cone angle setting has deviation with the design and simulation calculation, once a tower sweeping phenomenon (blade tip and tower barrel interference) occurs, the tower sweeping phenomenon occurs particularly under the condition of large load, the collapse phenomenon is easily caused, and the major economic loss and safety accidents are caused. The relevant authentication specifications specify: in the running state of the unit, the minimum distance between the blade tip and the wall surface of the tower cylinder is not less than 30% relative to the distance of the blade in the shape-unchanged state; and in the feathering shutdown state of the unit, the feathering shutdown state is not less than 5%, wherein the minimum distance is called the blade tip tower clearance. Effective data is fed back to the main control unit for effective monitoring of clearance, so that effective control over the state of the unit and the state of the side paddles is achieved, and the method has important significance for safe operation of the unit.
At present, clearance is monitored by calculating clearance of a blade tower drum based on high-speed photography and image post-processing analysis, or positioning the position of a blade tip by arranging laser in a cabin cover, or monitoring the clearance by installing a plurality of infrared laser sensors or radars on the outer wall of the tower drum. However, these monitoring methods are susceptible to severe conditions such as rain, fog, sand, and dust. In addition, in view of the limitation of factors such as different capacities, different tower heights, different blade sizes and the like, the installation angles of various sensors for monitoring clearance are required to be adjusted on the actual installation site, and the adjustment of the angles directly influences the accuracy of the test and the effectiveness and convenience of angle adjustment, thereby having important significance for site construction and debugging.
Disclosure of Invention
The invention provides a millimeter wave-based blade clearance monitoring system, which realizes dynamic real-time fault-tolerant monitoring of blade clearance based on millimeter waves, is not influenced by severe working conditions such as rain, fog and dust, and has the advantages of high reliability and high precision.
The technical scheme adopted for realizing the above purpose of the invention is as follows:
a blade clearance monitoring system based on millimeter waves at least comprises a millimeter wave sensor, a mounting bracket, a power and signal cable, an intelligent controller and a main control machine, wherein the millimeter wave sensor is mounted on the mounting bracket and fixed on a wind generating set through the mounting bracket, the intelligent controller is connected with the millimeter wave sensor through the power and signal cable and receives clearance signals, the intelligent controller is connected with the main control machine and realizes bidirectional transmission of main control parameters, the mounting bracket comprises a fixed cover, an adjusting plate and a fixed plate, the adjusting plate and the fixed plate are positioned in the fixed cover, a rear cover plate is fixedly connected to the rear of the fixed cover, the adjusting plate is composed of a first adjusting plate and a second adjusting plate which are perpendicular to each other and fixedly connected into a whole, the first adjusting plate and the rear cover plate are connected to enable the second adjusting plate to stand up, the millimeter wave sensor is connected with the second adjusting plate through the fixed plate and extends out of the bottom of the fixed cover, the millimeter wave sensor is characterized in that the first adjusting plate and the second adjusting plate are both provided with round holes and arc-shaped holes, the round holes and the arc-shaped holes are concentrically arranged, the arc-shaped holes in the first adjusting plate and the second adjusting plate are arranged along different directions, the round holes are connected with fixing fasteners, the arc-shaped holes are connected with adjusting fasteners, the first adjusting plate and the rear cover plate and the fixed plate and the second adjusting plate are connected through the fixing fasteners and the adjusting fasteners, the installation position of the millimeter wave sensor is adjusted by adjusting the installation position of the fasteners in the arc-shaped holes, the installation support is fixed on a cabin cover of the wind generating set and/or is installed on a tower drum through a slide rail, and the intelligent controller is correspondingly installed in the cabin cover and/or at the bottom of the tower drum;
a transverse millimeter wave sensor for capturing a minimum clearance threshold value and a longitudinal millimeter wave sensor for capturing the distance between the blade tip and the tower barrel in real time are fixed on the cabin cover, so that fault-tolerant mutual backup of sensing equipment is realized; the millimeter wave sensors are fixedly installed through the installation support, the fixed cover of the installation support is installed in the cabin cover, and the millimeter wave sensors extend out of the installation holes formed in the cabin cover; the slide rail is provided with a circle along a tower section of thick bamboo connection, and the supporting slider that is provided with on the slide rail, the installing support is fixed in on the slider and makes millimeter wave sensor towards the blade, and the side of installing support is connected with driving motor, moves along the slide rail through driving motor drive installing support and slider, and the mounting height of millimeter wave sensor is unanimous with the height when blade theoretical deflection reaches minimum clearance value, driving motor is connected with intelligent control ware, realizes driving motor's drive angle and operating speed's control.
The sliding rail is provided with a guide rail for guiding the power and signal cables, and the power and signal cables are connected with a self-weight block for recovering the power and signal cables when the yaw angle is reduced.
The fixing cover and the second adjusting plate are respectively and fixedly connected with a first adjusting supporting block and a second adjusting supporting block, the first adjusting supporting block and the second adjusting supporting block are respectively provided with a threaded through hole, an adjusting screw is connected onto the threaded through hole, the adjusting screw penetrates through the first adjusting supporting block, is propped against the first adjusting plate and pushes the first adjusting plate, and position adjustment of the first adjusting plate on the back cover plate is achieved; the adjusting screw penetrates through the second adjusting supporting block and is arranged on the fixing plate in a top-mounted mode and pushes the fixing plate, and therefore position adjustment of the fixing plate on the second adjusting plate is achieved.
And the fixed cover is provided with operation holes at the corresponding positions of the adjusting screws.
The first adjusting supporting block and the fixing cover are connected through welding, and the second adjusting supporting block and the second adjusting plate are connected through welding.
The millimeter wave sensor is fixed on the bottom of the cabin cover or the side surface close to the top.
The fixed plate is "T" style of calligraphy of falling, millimeter wave sensor connects in the bottom of fixed plate, and the fixed plate is connected with the second regulating plate, makes the millimeter wave sensor stretch out from the bottom of fixed cover.
And a supporting plate is fixedly connected to the right angle of the fixing plate.
The whole fixed cover is in a shape like a Chinese character 'ji', and the fixed cover is connected with the cabin cover or the driving motor through a fixing screw.
The fixing fastener is applied with pretightening force.
Compared with the prior art, the technical scheme provided by the invention has the following advantages: 1. according to the blade clearance monitoring system provided by the invention, the millimeter wave sensors are transversely and longitudinally arranged on the cabin cover, and the initial debugging of the mounting bracket is adopted, so that on one hand, the clearance value of the blade can be monitored, on the other hand, the unidirectional threshold triggering can be realized, the safety chain action is rapidly carried out, and the fault-tolerant arrangement of the millimeter wave sensors and the mounting bracket realizes the more reliable operation of a unit.
2. When the blade clearance monitoring system provided by the invention is arranged on a tower drum, a slide rail and a driving motor are arranged on the tower drum, and the millimeter wave sensor is driven to move by the driving motor, so that the clearance can be effectively monitored during the unit yaw; meanwhile, the driving motor is connected with the intelligent controller, the running speed and the angle of the driving motor are controlled by receiving yaw control information of the main control computer, and the adjustment of the angle and the angular speed of the millimeter wave sensor is realized, so that the effective monitoring of the clearance of the blades is realized under the yaw working condition, and the clearance change of the blades is dynamically adjusted and monitored by linkage with the yaw angle.
3. According to the blade clearance monitoring system, the millimeter wave sensors are arranged and installed on the cabin cover in a fault-tolerant mode, and the arrangement on the tower barrel is achieved through east-platform movement, so that the clearance of a unit and the running health state of the blades can be judged quickly, the safe running of the unit is effectively guaranteed, and the fault tolerance of monitoring can be achieved.
4. The mounting bracket provided by the invention can realize multidirectional adjustment of the millimeter wave sensor, meet the debugging requirements of the millimeter wave sensor arranged on the engine room cover or the tower drum, and ensure the accuracy of a target value, thereby ensuring the effectiveness of blade clearance data capture; the requirements of different impeller diameters, different capacities and different occasions on the installation angle of the clearance sensor can be met; meanwhile, the state difference of the three blades in the actual operation process and the clearance change rule under different loads can be effectively captured by combining the variable pitch angle, and the subsequent design optimization is guided.
5. When the blade clearance monitoring system provided by the invention is arranged on a tower barrel, the guide rail is arranged on the slide rail, so that the power and signal cables connected to the driving motor and the millimeter wave sensor correspondingly walk along with the driving motor and the millimeter wave sensor, and finally the response of the driving motor and the millimeter wave sensor to a yaw angle is met; simultaneously, through connect from the pouring weight on power and signal cable, satisfy power and signal cable and can retrieve along the guide rail under the driftage angle reduction condition to avoid power and signal cable jamming to appear.
6. The blade clearance monitoring system provided by the invention can effectively improve the environmental adaptability of clearance monitoring equipment by applying a millimeter wave technology, and can normally operate under the working conditions of rain, snow, fog and dust so as to avoid monitoring failure caused by environmental factors.
Drawings
FIG. 1 is a schematic illustration of an installation of a millimeter wave based blade clearance monitoring system provided by the present invention;
FIG. 2 is an axial view of the mounting bracket of the present invention;
FIG. 3 is a front view of the mounting bracket of the present invention;
FIG. 4 is a schematic structural view of a fixing cover according to the present invention;
wherein (a) is a perspective view and (b) is a front view;
FIG. 5 is a schematic view of an adjusting plate according to the present invention;
wherein, (a) is a perspective view of the whole structure, (b) is a front view of the second adjusting plate, and (c) is a front view of the first adjusting plate;
FIG. 6 is a schematic view of the connection between the fixed plate and the millimeter wave sensor according to the present invention;
FIG. 7 is a schematic diagram of a fault tolerant arrangement of millimeter wave sensors on a nacelle cover according to the present invention;
FIG. 8 is a schematic view of a sector of a transverse millimeter wave sensor according to the present invention;
FIG. 9 is a schematic diagram of the operation of the transverse millimeter wave sensor of the present invention;
FIG. 10 is a schematic view of the arrangement of millimeter wave sensors on a tower in the direction A-A in FIG. 1;
FIG. 11 is an enlarged view of a portion of area B of FIG. 1;
in the figure: 100-blade, 200-nacelle cover, 300-tower, 1-intelligent controller, 2-power and signal cable, 3-millimeter wave sensor, 31-transverse millimeter wave sensor, 32-longitudinal millimeter wave sensor, 4-mounting bracket, 41-fixing cover, 411-operation hole, 42-adjusting plate, 421-first adjusting plate, 4211-round hole A, 4212-arc hole A, 4213-fixing fastener A, 4214-adjusting fastener A, 422-second adjusting plate, 4221-round hole B, 4222-arc hole B, 4223-fixing fastener B, 4224-adjusting fastener B, 43-fixing plate, 44-rear, 45-support plate, 46-first adjusting support block, 461-adjusting screw A, 47-second adjustment support block, 471-adjustment screw B, 5-optical fiber, 6-sector, 7-slide rail, 8-slide block, 9-driving motor, 10-guide rail and 11-self-weight block.
Detailed Description
The present invention will be described in detail with reference to the following embodiments and drawings, but the scope of the present invention is not limited to the following embodiments.
Example 1
The millimeter wave-based blade clearance monitoring system provided in this embodiment is shown in fig. 1, and at least includes a millimeter wave sensor 3, a mounting bracket 4, a power and signal cable 2, an intelligent controller 1 and a main control computer, wherein the millimeter wave sensor is mounted on the mounting bracket and fixed to a wind turbine generator system through the mounting bracket to monitor clearance of a blade 100, and the millimeter wave sensor may be fixed to a nacelle cover 200 or a tower 300. The intelligent controller is connected with the millimeter wave sensor through a power and signal cable and receives clearance signals, and the intelligent controller is connected with the main control computer through an optical fiber 5 to realize interaction with main control key parameters. Specifically, the main control computer counts clearance values and performs topological analysis by receiving pitch angles, wind speeds, load sensor parameters and the like, so that the rule analysis of each parameter value and the clearance value is realized, the monitoring result is fed back to the main control computer through the intelligent controller, the accuracy of the clearance value calculated through simulation and the effectiveness of the blade machining process are effectively verified, and further the actual design and manufacturing process can be further guided.
The structure of the mounting bracket 4 provided in this embodiment is as shown in fig. 2 and fig. 3, and includes a fixing cover 41, an adjusting plate 42 and a fixing plate 43 located in the fixing cover, a back plate 44 is fixedly connected to the back of the fixing cover, the fixing cover is used for bearing the weight of the whole mounting bracket and realizing the fixing of the mounting bracket, the adjusting plate is composed of a first adjusting plate 421 and a second adjusting plate 422 which are perpendicular to each other, the first adjusting plate and the back plate are fixedly connected into a whole, the first adjusting plate is connected to the back plate to erect the second adjusting plate, in this embodiment, the fixing plate is in an inverted "T" shape, the millimeter wave sensor is connected to the bottom of the fixing plate, and the fixing plate is connected to the second adjusting plate to extend the millimeter wave sensor from the bottom of the fixing cover. The right angle department on the fixed plate is connected and is fixed with backup pad 45, ensures to connect the steadiness. The structures of the fixing cover, the adjusting plate and the fixing plate are shown in fig. 4, 5 and 6, respectively.
Specifically, be provided with round hole A4211 and arc hole A4212 on the first regulating plate in this embodiment, round hole A and arc hole A adopt concentric setting, are connected with fixing fastener A4213 on the round hole A, are connected with adjustment fastener A4214 on the arc hole A, are connected through fixing fastener A and adjustment fastener A between first regulating plate and the back shroud, fixing fastener exerts the pretightning force, adjusts the installation position of millimeter wave sensor through the mounted position of adjustment fastener A in arc hole A. Also be provided with round hole B4221 and arc hole B4222 on the second regulating plate in this embodiment, round hole B and arc hole B adopt concentric setting, are connected with fixing fastener B4223 on the round hole B, are connected with adjustment fastener B4224 on the arc hole B, are connected through fixing fastener B and adjustment fastener B between fixed plate and the second regulating plate to adjust the installation position of millimeter wave sensor through the mounted position of adjustment fastener B in arc hole B. The arc hole on first regulating plate and the second regulating plate sets up along equidirectional setting, and arc hole A on the first regulating plate sets up along vertical direction in this embodiment, and arc hole B on the second regulating plate sets up along the fore-and-aft direction, as shown in fig. 5, and wherein a degree adjustment angle and B degree adjustment angle set up according to millimeter wave sensor's demand to realize the installation angle of millimeter wave sensor different positions on two perpendiculars and adjust.
In order to facilitate adjustment of the installation angle, in the embodiment, a first adjusting support block 46 and a second adjusting support block 47 are welded on the fixing cover and the second adjusting plate respectively, the first adjusting support block and the second adjusting support block are both provided with threaded through holes, adjusting screws are connected to the threaded through holes, an adjusting screw a461 penetrates through the first adjusting support block and is abutted to the first adjusting plate and pushes the first adjusting plate, specifically, the first adjusting support block and the adjusting screw a are correspondingly provided with two adjusting screws, the upper portion and the lower portion of one side, away from the second adjusting plate, of the first adjusting plate on the rear cover plate are distributed, and the adjusting screw a is controlled to push the first adjusting plate by adjusting the depth of the two adjusting screws a in the first adjusting support block, so that the adjusting fastener a adjusts the position on the arc-shaped hole a, and the position of the first adjusting plate is adjusted; adjusting screw B471 passes through the second adjusting support block and is overhead-mounted on the fixed plate and pushes against the fixed plate, specifically, the second adjusting support block and adjusting screw B are also correspondingly provided with two, and are distributed on the front and rear sides of the upper portion of the second adjusting plate and located on both sides of the fixed plate, in order to facilitate the installation of the second adjusting plate, both sides of the upper portion of the fixed plate are inwardly provided with notches, as shown in fig. 6, by adjusting the depth of the two adjusting screws B in the second adjusting support block, adjusting screw B is controlled to push against the fixed plate, so that adjusting fastener B adjusts the position on arc-shaped hole B, the adjustment of the position of the fixed plate is realized, and the adjustment of the installation angle of the clearance sensor is realized. In addition, the fixing covers are provided with operation holes 411 at corresponding positions of the adjustment screws, as shown in fig. 4, so that the adjustment screws can be conveniently adjusted by a tool from the operation holes. The angle is adjusted through the adjusting screw, and in addition, the rotating depth of the adjusting screw can be converted into a corresponding adjusting angle, so that accurate adjustment is realized. If the arc-shaped hole A on the first adjusting plate is arranged along the left-right direction, the arc-shaped hole B on the second adjusting plate is arranged along the vertical direction, correspondingly, the two first adjusting support blocks are distributed on the upper portions, located on the left side and the right side of the first adjusting plate, of the rear cover plate, and the adjusting screws A are arranged on two sides of the upper portions of the first adjusting plates in a propping manner; two second adjustment supporting blocks distribute in the upper and lower part of second regulating plate front side or the upper and lower part of rear side, make adjusting screw B top in the upper and lower part of fixed plate front side or the upper and lower part of rear side, correspondingly, the upper and lower part of fixed plate front side or the upper and lower part of rear side inwards have the breach this moment, and fixed cover all is provided with the handle hole in adjusting screw's corresponding position department, also can realize millimeter wave sensor installation angle's regulation this moment.
In this embodiment, the millimeter wave sensor is disposed on the nacelle cover and the tower, and the intelligent controller is correspondingly disposed in the nacelle cover and at the bottom of the tower, as shown in fig. 1, the millimeter wave sensor may be fixed to the bottom of the nacelle cover or the side near the top. And each millimeter wave sensor is fixedly installed through the installation support. In this embodiment, the whole fixed cover of installing support is "nearly" style of calligraphy, and fixed cover is connected through set screw with the cabin cover. When the fixing cover is installed on a tower barrel, the side face of the fixing cover is connected with the driving motor and fixed through the fixing screws.
In this embodiment, a transverse millimeter wave sensor 31 and a longitudinal millimeter wave sensor 32 are fixed to the bottom of the nacelle cover, and both the millimeter wave sensors extend out of a mounting hole formed in the nacelle cover and monitor clearance of the blades. The transverse millimeter wave sensor is adjusted through the mounting bracket and is used for capturing a minimum clearance threshold value, if blades appear in a sector monitored by the transverse millimeter wave sensor, a safety chain is triggered, and the safety protection of the unit is realized by a control strategy of the main control computer; the longitudinal millimeter wave sensor is adjusted through the mounting bracket, so that the millimeter wave sensor is used for capturing the distance between the blade tip entering the monitoring sector area and the tower drum in the rotating process in real time, and the fault-tolerant mutual backup of the sensing equipment is realized, as shown in fig. 7. When one group of millimeter wave sensors fails, the other group can still ensure the clearance safety. The sector area of the transverse millimeter wave sensor is shown in fig. 8, the sector area and the blade form an approximately parallel structure, once the clearance value is too small and reaches a safety threshold value, the blade tip enters the sector area, the walking track of the blade tip can be captured, and effective information transmission is carried out by the intelligent controller, so that issuing of a control strategy of a main control unit is realized, and safe operation of a unit is ensured.
The action principle of the transverse millimeter wave sensor is shown in fig. 9, and the distance between the blade tip and the tower barrel is L under the wind load-free action of the blade0And actually, under the action of wind load, the blade can be bent and deformed, when the theoretical deformation reaches the minimum blade clearance L ', the actual distance from the ground of the blade tip position of the blade is higher, the inclination angle position of the blade is determined through the height, the minimum clearance value L' and the arrangement position of the transverse millimeter wave sensor in the cabin cover, and the distance L from the wall surface of the tower cylinder is captured to the ground through the sector of the bladesAnd finally completing initial debugging of the transverse millimeter wave sensor by capturing the position, wherein the initial debugging (sector and angle debugging) of the millimeter wave sensor is completed through an adjusting screw of the mounting bracket. Similarly, the longitudinal millimeter wave sensor also needs to be initially debugged through an adjusting screw, so that the sector can capture the distance between the blade tip and the tower drum entering the monitoring sector in the rotating process in real time.
When the millimeter wave sensor is arranged on a tower barrel, a yaw working condition can appear in the actual operation process of the unit, if the millimeter wave sensor is fixed, the millimeter wave sensor cannot effectively monitor the clearance along with the occurrence of the yaw working condition. Therefore, in the embodiment, the millimeter wave sensor on the tower is mounted on the tower through the slide rail 7, as shown in fig. 10. The height of the millimeter wave sensor is consistent with the height of the millimeter wave sensor when the theoretical deformation of the blade reaches the minimum clearance value L', and the millimeter wave sensor is initially debugged through the adjusting screw of the mounting bracket, so that the change of the track of the blade in a front section and a rear section of area of the tower can be monitored in real time, the distance between the blade and the tower can be captured, the millimeter wave sensor can capture the distance between the blade root tip part of the blade and the tower, and the clearance can be effectively monitored and captured regularly. The slide rail is provided with the round along a tower section of thick bamboo connection, the supporting slider 8 that is provided with on the slide rail, the slider moves on the slide rail, the installing support is fixed in on the slider and makes the millimeter wave sensor towards the blade, the side of installing support is connected with driving motor 9, at this moment, the preceding opening part installation down of installing support, it moves along the slide rail through driving motor drive installing support and slider, driving motor is connected with the intelligent control ware, the driftage control information of main control computer is received through the intelligent control ware, thereby realize corresponding angle control and functioning speed control to driving motor, realize that the millimeter wave sensor can be all the time to the seizure of distance between blade root point portion and a tower section of thick bamboo.
In the driving process of the driving motor, the power and signal cables will also move correspondingly, so in the actual configuration process, the requirement of ensuring the maximum yaw angle is required to be sufficient in length, in order to effectively guide and walk, the guide rail 10 is arranged on the slide rail, the guide of the power and signal cables is realized, meanwhile, because the dead weight of the power and signal cables is small, the dead weight 11 is connected and arranged on the power and signal cables, and the effective recovery of the power and signal cables under the working condition of reducing the yaw angle is realized through the dead weight of the self-weight 11 when the length and the weight cannot meet the requirement of yaw small-angle adjustment.
Claims (10)
1. The utility model provides a blade headroom monitoring system based on millimeter wave includes millimeter wave sensor, installing support, power and signal cable, intelligent control ware and main control computer at least, and wherein the millimeter wave sensor is installed on the installing support and is fixed in wind generating set through the installing support on, and the intelligent control ware passes through power and signal cable and is connected and receives the headroom signal with the millimeter wave sensor, and the intelligent control ware is connected and realizes the two-way transmission of master control parameter with the main control computer, its characterized in that:
the mounting bracket comprises a fixed cover, an adjusting plate and a fixed plate which are positioned in the fixed cover, the back of the fixed cover is fixedly connected with a rear cover plate, the adjusting plate consists of a first adjusting plate and a second adjusting plate which are vertical to each other and are fixedly connected into a whole, the first adjusting plate and the rear cover plate are connected to enable the second adjusting plate to stand up, a millimeter wave sensor is connected with the second adjusting plate through the fixed plate and extends out of the bottom of the fixed cover, round holes and arc-shaped holes are respectively arranged on the first adjusting plate and the second adjusting plate, the round holes and the arc-shaped holes are concentrically arranged, the arc-shaped holes on the first adjusting plate and the second adjusting plate are arranged along different directions, fixing fasteners are connected on the round holes, adjusting fasteners are connected on the arc-shaped holes, and the first adjusting plate and the rear cover plate as well as the fixed plate and the second adjusting plate are connected through the fixing fasteners and the adjusting fasteners, the installation position of the millimeter wave sensor is adjusted by adjusting the installation position of the fastener in the arc-shaped hole, the installation support is fixed on an engine room cover of the wind generating set and/or is installed on the tower drum through a slide rail, and the intelligent controller is correspondingly installed in the engine room cover and/or at the bottom of the tower drum;
a transverse millimeter wave sensor for capturing a minimum clearance threshold value and a longitudinal millimeter wave sensor for capturing the distance between the blade tip and the tower barrel in real time are fixed on the cabin cover, so that fault-tolerant mutual backup of sensing equipment is realized; the millimeter wave sensors are fixedly installed through the installation support, the fixed cover of the installation support is installed in the cabin cover, and the millimeter wave sensors extend out of the installation holes formed in the cabin cover; the slide rail is provided with a circle along a tower section of thick bamboo connection, and the supporting slider that is provided with on the slide rail, the installing support is fixed in on the slider and makes millimeter wave sensor towards the blade, and the side of installing support is connected with driving motor, moves along the slide rail through driving motor drive installing support and slider, and the mounting height of millimeter wave sensor is unanimous with the height when blade theoretical deflection reaches minimum clearance value, driving motor is connected with intelligent control ware, realizes driving motor's drive angle and operating speed's control.
2. The millimeter wave based blade clearance monitoring system of claim 1, wherein: the sliding rail is provided with a guide rail for guiding the power and signal cables, and the power and signal cables are connected with a self-weight block for recovering the power and signal cables when the yaw angle is reduced.
3. The millimeter wave based blade clearance monitoring system of claim 1, wherein: the fixing cover and the second adjusting plate are respectively and fixedly connected with a first adjusting supporting block and a second adjusting supporting block, the first adjusting supporting block and the second adjusting supporting block are respectively provided with a threaded through hole, an adjusting screw is connected onto the threaded through hole, the adjusting screw penetrates through the first adjusting supporting block, is propped against the first adjusting plate and pushes the first adjusting plate, and position adjustment of the first adjusting plate on the back cover plate is achieved; the adjusting screw penetrates through the second adjusting supporting block and is arranged on the fixing plate in a top-mounted mode and pushes the fixing plate, and therefore position adjustment of the fixing plate on the second adjusting plate is achieved.
4. The millimeter wave based blade clearance monitoring system of claim 3, wherein: and the fixed cover is provided with operation holes at the corresponding positions of the adjusting screws.
5. The millimeter wave based blade clearance monitoring system of claim 3, wherein: the first adjusting supporting block and the fixing cover are connected through welding, and the second adjusting supporting block and the second adjusting plate are connected through welding.
6. The millimeter wave based blade clearance monitoring system of claim 1, wherein: the millimeter wave sensor is fixed on the bottom of the cabin cover or the side surface close to the top.
7. The millimeter wave based blade clearance monitoring system of claim 1, wherein: the fixed plate is "T" style of calligraphy of falling, millimeter wave sensor connects in the bottom of fixed plate, and the fixed plate is connected with the second regulating plate, makes the millimeter wave sensor stretch out from the bottom of fixed cover.
8. The millimeter wave based blade clearance monitoring system of claim 7, wherein: and a supporting plate is fixedly connected to the right angle of the fixing plate.
9. The millimeter wave based blade clearance monitoring system of claim 1, wherein: the whole fixed cover is in a shape like a Chinese character 'ji', and the fixed cover is connected with the cabin cover or the driving motor through a fixing screw.
10. The millimeter wave based blade clearance monitoring system of claim 1, wherein: the fixing fastener is applied with pretightening force.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116008970A (en) * | 2023-03-27 | 2023-04-25 | 南京牧镭激光科技股份有限公司 | Method for verifying radar null value inversion accuracy based on video image |
Citations (4)
| 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 |
| US20180283352A1 (en) * | 2017-03-31 | 2018-10-04 | General Electric Company | Method for Preventing Wind Turbine Rotor Blade Tower Strikes |
| CN112628075A (en) * | 2020-12-16 | 2021-04-09 | 浙江大学 | Blade clearance monitoring system and method for wind generating set |
| CN112926218A (en) * | 2021-03-23 | 2021-06-08 | 芜湖森思泰克智能科技有限公司 | Method, device, equipment and storage medium for acquiring clearance |
-
2021
- 2021-11-17 CN CN202111366217.0A patent/CN114199167B/en active Active
Patent Citations (4)
| 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 |
| US20180283352A1 (en) * | 2017-03-31 | 2018-10-04 | General Electric Company | Method for Preventing Wind Turbine Rotor Blade Tower Strikes |
| CN112628075A (en) * | 2020-12-16 | 2021-04-09 | 浙江大学 | Blade clearance monitoring system and method for wind generating set |
| CN112926218A (en) * | 2021-03-23 | 2021-06-08 | 芜湖森思泰克智能科技有限公司 | Method, device, equipment and storage medium for acquiring clearance |
Non-Patent Citations (1)
| Title |
|---|
| 邢晓坡;: "基于光纤传感技术的风电叶片运行状态监测系统", 天津科技, no. 09, 25 September 2018 (2018-09-25), pages 79 - 81 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116008970A (en) * | 2023-03-27 | 2023-04-25 | 南京牧镭激光科技股份有限公司 | Method for verifying radar null value inversion accuracy based on video image |
| CN116008970B (en) * | 2023-03-27 | 2024-01-05 | 南京牧镭激光科技股份有限公司 | Method for verifying radar null value inversion accuracy based on video image |
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