CN214247577U - Monitoring device for monitoring bolt loosening state and wind turbine generator - Google Patents
Monitoring device for monitoring bolt loosening state and wind turbine generator Download PDFInfo
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- CN214247577U CN214247577U CN202022613133.XU CN202022613133U CN214247577U CN 214247577 U CN214247577 U CN 214247577U CN 202022613133 U CN202022613133 U CN 202022613133U CN 214247577 U CN214247577 U CN 214247577U
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Abstract
The utility model discloses a monitoring devices, wind turbine generator system for monitoring bolt not hard up state belongs to the locking field of bolt, including terminal sensor, communication controller and the central control room server that connects gradually, wherein: the terminal sensor comprises a magnetic encoder and a gap measuring sensor, the magnetic encoder is used for measuring the relative angle between the bolt to be measured and the fixing nut, and the gap measuring sensor is used for recording the gap increment of the clamped part caused by the loosening of the bolt to be measured; the central control room server comprises a display and a controller, the display is used for displaying angle data and gap distance data collected by the terminal sensor, and the controller is used for judging whether the collected data exceed a preset angle and distance threshold value and sending out early warning information according to a judgment result. The utility model discloses a measure blade bolt and fixation nut relative angle and obtain bolt pretension state by two key physical quantities of gap interval between the clamping piece, realize simply, measure accurately.
Description
Technical Field
The utility model relates to a bolt locking field especially relates to a monitoring devices, magnetic encoder, wind turbine generator system for monitoring bolt not hard up state.
Background
The wind generating set is used as a large assembly product, and bolt connection is the main connection mode among all parts of the wind generating set. The blade is connected with the wind wheel through the bolt as a core component of the wind turbine generator, but the fixing bolt of the blade is influenced by factors of small maintenance operation space, large pretightening force dispersion degree of the bolt and complex alternating load bearing for a long time, is easy to loosen, and can cause bolt fracture and pitch bearing fracture due to untimely treatment, thereby causing secondary accidents of blade falling.
At present, the bolt fastening state is guaranteed by adopting a mode of manual regular maintenance (1 year) for connecting bolts of the wind generating set, the mode has the defects of time consuming, low efficiency and high cost, the manual regular maintenance can not guarantee the real-time performance of bolt connection fastening degree detection, and the great potential safety hazard exists for the unit operation safety guarantee.
In order to monitor the bolt pre-tightening state in real time and ensure the safety and reliability of the connection of the blades of the unit, different types of bolt pre-tightening state real-time monitoring systems are introduced in the market. Currently, the mainstream monitoring methods include: ultrasonic measurement, pressure washer measurement, image recognition measurement, and the like. However, the ultrasonic measurement method mainly has the defects of high price, complex installation of polishing bolts and active wiring and difficult stress calibration, the pressure washer measurement method mainly has the defect that the whole stress is influenced by the pressure washer added by the disassembled nut, and the image recognition measurement method mainly has the defects of high price, large environment space occupied by sensor arrangement and complex installation of active wiring.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a monitoring devices, magnetic encoder, wind turbine generator system for monitoring bolt not hard up state, the utility model discloses a monitoring devices is with low costs, the construction is convenient, can not change former bolt substructure and assembly relation and carry out the monitoring of bolt not hard up on-line state, can solve the objective problem that there is hidden danger in current blade bolt mode of examining surely.
In order to solve the technical problem, the utility model provides a technical scheme as follows:
on the one hand, the utility model provides a monitoring devices for monitoring bolt not hard up state, including terminal sensor, communication controller and the central control room server that connects gradually, wherein:
the terminal sensor comprises a magnetic encoder and a gap measuring sensor, the magnetic encoder is used for measuring the relative angle between the bolt to be measured and the fixing nut, and the gap measuring sensor is used for recording the gap increment of the clamped part caused by the loosening of the bolt to be measured;
the communication controller is used for transmitting data acquired by the terminal sensor to the central control room server;
the central control room server comprises a display and a controller, the display is used for displaying angle data and gap distance data collected by the terminal sensor, and the controller is used for judging whether the collected data exceed a preset angle and distance threshold value and sending out early warning information according to a judgment result.
Further, the magnetic encoder includes the encoder body and follows the support, the encoder body is used for connecting the bolt tip that awaits measuring, follow the support include top support and with top leg joint's a plurality of tight landing legs that press from both sides, a plurality of tight landing legs that press from both sides are used for fastening the fixation nut of the bolt that awaits measuring, the top support is connected with the encoder top, it is rotatory along with fixation nut and drive magnetic encoder to follow the support, the encoder body record awaits measuring bolt and fixation nut not hard up rotation angle value.
Further, the encoder body comprises a shell and an angle magnetic encoder positioned in the shell, a hole site is formed in the top of the shell, a top pin assembled with the hole site is arranged on the top support, and a threaded hole used for assembling a bolt to be tested is formed in the bottom of the shell.
Furthermore, still be equipped with lithium cell and zigBee module in the shell, the zigBee module is used for carrying out zigBee wireless transmission with the signal of telecommunication of angle magnetic encoder output.
Further, a rubber member is connected to the inner side of each clamping leg.
Further, the top bracket is hinged with each clamping leg by a pin.
Further, the clamping device also comprises a spring connected between the clamping leg and the top support, and the spring is used for enabling the clamping leg to clamp the fixing nut through the tension of the spring.
Furthermore, the gap measuring sensor comprises an FBG-based fiber bragg grating sensor and an FBG demodulation module, the fiber bragg grating sensor is used for being fixed between the bolt to be measured and the nut clamping piece, and the fiber bragg grating sensor is connected with the FBG demodulation module through a serial port bus;
further, the gap measuring sensor further comprises a lithium battery and a ZigBee module, and the ZigBee module is used for carrying out ZigBee wireless transmission on the displacement change.
Further, the central control room server further comprises a memory and/or a zeroing module.
On the other hand, provide a magnetic encoder for the angular variation of monitoring bolt not hard up state, include the encoder body and follow the support, the encoder body is used for connecting the bolt tip that awaits measuring, follow the support include top support and with a plurality of tight landing legs of clamp of top leg joint, a plurality of tight landing legs of clamp are used for fastening the fixation nut of the bolt that awaits measuring, the top support is connected with the encoder top, it can be rotatory and drive the magnetic encoder along with fixation nut to follow the support, the encoder body record awaits measuring bolt and fixation nut not hard up rotation angle value.
Further, the encoder body comprises a shell and an angle magnetic encoder positioned in the shell, a hole site is formed in the top of the shell, a top pin assembled with the hole site is arranged on the top support, and a threaded hole used for assembling a bolt to be tested is formed in the bottom of the shell.
Further, a rubber member is connected to the inner side of each clamping leg.
Further, the top bracket is hinged with each clamping leg by a pin.
Further, the clamping device also comprises a spring connected between the clamping leg and the top support, and the spring is used for enabling the clamping leg to clamp the fixing nut through the tension of the spring.
In another aspect, a wind turbine generator set is provided, which includes the monitoring device for monitoring bolt loosening state, wherein,
the magnetic encoder is used for measuring the relative angle between the blade root bolt to be measured and the fixing nut, and the gap measuring sensor is used for recording the increment of the gap between the variable pitch bearing and the blade root flange caused by the looseness of the blade root bolt to be measured.
After adopting such design, the utility model discloses following advantage has at least:
(1) the utility model discloses a monitoring devices can realize real-time supervision blade bolt pretension state function, can effectively avoid present periodic overhaul mode can not in time discover and handle the not hard up fault, the accident problem that causes of bolt. The utility model discloses a monitoring devices measures accurately, and the user equipment price is low, and occupation environmental space is little, does not change former bolt substructure and assembly relation, and installs, disassembles conveniently.
(2) The utility model discloses a measure blade bolt and fixation nut relative angle and obtain bolt pretension state by two key physical quantities of gap interval between the clamping piece, realize simply, measure accurately, avoid ultrasonic wave, pressure packing ring etc. direct survey bolt stress on the market, there is the vice calibration of different specification bolts complicated, measure the inaccurate problem of stress numerical value in the executive process.
(3) The utility model discloses a terminal sensor includes the magnetic encoder and the bolt clamping piece-blade root flange of blade bolt fastening nut end and becomes the clearance measurement sensor (fiber grating sensor) between the oar bearing flange, and two kinds of sensors have the advantage that low price, installation are convenient, do not change former bolt substructure and assembly relation than bolt stress sensors such as supersound formula, piezoelectric type (packing ring) on the market.
(4) The utility model discloses a terminal sensor realizes lithium battery powered, and signal transmission realizes wireless transmission between wind wheel and the cabin, avoids bolt stress sensor such as supersound formula, piezoelectric type (packing ring) on the present market, and wired power supply, wired data transmission use the cable fixed, protection difficulty in rotatory wind wheel, realize wind wheel and cabin within the control system condition difficult problem of communication under the main control system condition in the oar system of changing in the wind wheel of original unit and cabin simultaneously.
Drawings
The foregoing is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clear, the present invention will be further described in detail with reference to the accompanying drawings and the detailed description.
Fig. 1 is a monitoring schematic diagram of a monitoring device for monitoring a bolt loosening state according to the present invention;
fig. 2 is a schematic structural diagram of an embodiment of the monitoring device for monitoring the loosening state of the bolt according to the present invention, which is mounted on the bolt to be tested;
FIG. 3 is a schematic structural diagram of one embodiment of the magnetic encoder of the present invention;
FIG. 4 is a schematic cross-sectional view of one embodiment of the magnetic encoder of the present invention;
fig. 5 is a schematic structural view of the following bracket of the magnetic encoder of the present invention;
fig. 6 is a schematic structural diagram of the fiber grating sensor in the terminal sensor of the present invention.
The system comprises a terminal sensor 1, a cabin communication controller 3, a central control room server 41, bolts 42, fixing nuts 5, a variable pitch bearing 6, a blade root flange 7, a blade root hole plate 11, a magnetic encoder 111 encoder body 1111, a shell 1112, an angle magnetic encoder 1113, a ZigBee module 1114, a button lithium battery 112, a following bracket 1121, a top bracket 1122, a top pin 1123 pin 1124, a spring 1125, a clamping leg 1126, a rubber part 12, a gap measurement sensor 121, an FBG-based fiber bragg grating sensor 122, an FBG demodulation module 123, a square lithium battery 124 and a ZigBee module.
Detailed Description
Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
The utility model provides an embodiment of a monitoring devices for monitoring bolt not hard up state, as shown in fig. 1 to fig. 6, including terminal sensor 1, communication controller 2 and well accuse room (user side) server 3 that connect gradually, wherein: the terminal sensor 1 comprises a magnetic encoder 11 and a gap measuring sensor 12, wherein the magnetic encoder 11 is used for measuring the relative angle between the bolt 41 to be measured and the fixing nut 42, and the gap measuring sensor 12 is used for recording the gap increment (the gap between the variable pitch bearing and the blade root flange) of a clamped piece caused by the looseness of the bolt 41 to be measured; the communication controller 2 is used for transmitting the data acquired by the terminal sensor to the central control server 3; the central control room server 3 comprises a display and a controller, the display is used for displaying angle data and gap distance data collected by the terminal sensor, and the controller is used for judging whether the collected data exceed a preset angle and distance threshold value and sending out early warning information according to a judgment result.
When the utility model is used, the terminal sensor is positioned in the wind wheel of the wind turbine generator, the communication controller is positioned in the cabin of the wind turbine generator, and the server of the central control room (user side) is positioned in the booster station of the wind power plant; the terminal sensor records two physical quantities of a blade bolt and a fixed nut backspin loosening angle at an appointed position and a gap between a clamped part, a variable pitch bearing and a blade root flange in real time, the cabin communication controller is responsible for collecting and processing data output by the terminal sensor and transmitting monitoring data into the central control room client server in real time through a unit ring network, the central control room server completes analysis and storage of the data through professional analysis software, analyzes a map through the real-time measured value and visually displays whether the bolt is loosened or not and the degree of the bolt is loosened, and sends out early warning information according to the bolt loosening degree.
The utility model discloses a concrete application method of monitoring devices as follows:
(1) arranging the terminal sensors in the front edge and rear edge areas where the wind power blade bolts are frequently damaged, wherein the specific number is based on the number covering the damage history of the blade root bolts of the specific type of the wind power plant;
(2) sequentially assembling the magnetic encoders of the terminal sensors on the bolts and the nuts of the blade root, installing the gap measuring sensors of the terminal sensors between the pitch bearing corresponding to the bolt position and the flange of the blade root and on the manhole plate near the blade root, installing an engine room communication controller on an engine room control cabinet, accessing a communication ring network of the wind power plant unit through an RJ45 net port, and finally installing a user end server of a central control room in a central control room of a booster station of the wind power plant and accessing the communication ring network of the wind power plant unit through an RJ45 net port. The terminal sensor monitors real-time data, firstly, the real-time data are wirelessly transmitted to a cabin communication controller with a ZigBee receiver through a ZigBee module configured by a magnetic encoder and a gap measurement sensor, secondly, the cabin communication controller processes the data and transmits the real-time data to a wind power plant unit communication ring network in a TCP/IP mode, and finally, the real-time data are acquired by a user side server of a central control room in the wind power plant unit communication ring network, and data processing, display and loosening early warning are carried out;
(3) and the central control room user side server collects and displays the terminal sensor data map in real time, judges whether the terminal sensor data exceed a set angle and a distance threshold value, gives out early warning information according to needs, timely informs operation and maintenance personnel of carrying out accurate maintenance on the blade root bolt, and carries out recalibration and zero setting after maintenance.
Further, in the step (2), the magnetic encoder of the terminal sensor records the loosening angle of the bolt and the fixed nut of the blade root, the fiber grating sensor of the terminal sensor records the increment of the clearance between the clamping piece and the blade root flange caused by the loosening of the bolt and the nut, and simultaneously can record the special working condition of the loosening angle which is not identified by the magnetic encoder of the terminal sensor and is caused by the sudden breakage of the bolt of the blade root, catch the increment of the clearance between the blade root flange and the blade root bearing after the breakage of the bolt in time, and accurately reflect the running state of the bolt and the nut.
Further, the angle and distance threshold in the step (3) is used for testing the relative counter-rotation angle value of the bolt and the nut when the pre-tightening force of the blade bolts with different specifications does not meet the design requirement through experiments, and recording the increment value of the gap of the clamped part at the moment and calibrating the increment value as the loosening threshold of the bolt of the type.
Furthermore, after the blade root bolt is loosened in the step (3), the operation and maintenance personnel only need to disassemble the loosened bolt and two bolts nearby the loosened bolt and the magnetic encoder of the terminal sensor, namely manually opening the following support in the magnetic encoder of the terminal sensor, then manually screwing out the body in the magnetic encoder, the fiber grating sensor of the terminal sensor does not need to be disassembled due to the fact that the torque is not influenced, then the torque is exerted to restore the pretightening force of the blade root bolt, then the magnetic encoder of the terminal sensor is repeatedly installed, and finally the fiber grating sensor is re-calibrated in the user side server of the central control room, so that the whole bolt loosening maintenance process of disassembling, torque exerting and installing is efficient and convenient.
The utility model discloses a several embodiments of monitoring devices can be:
A wind power blade bolt looseness prevention monitoring system comprises a terminal sensor 1, an engine room communication controller 2 and a central control room user side server 3. The terminal sensor 1 is positioned in a wind wheel of the wind turbine generator, the cabin communication controller 2 is positioned in a cabin of the wind turbine generator, and the user side server 3 of the central control room is positioned in a booster station of a wind power plant; the terminal sensor 1 records two physical quantities, namely a blade bolt and a fixed nut backspin loosening angle at an appointed position and a gap between a clamped part, a variable pitch bearing and a blade root flange in real time, the cabin communication controller 2 is responsible for collecting and processing data output by the terminal sensor 1, transmits monitoring data into the central control room client server 3 in real time through a unit ring network, and the central control room server 3 completes analysis and storage of the data through professional analysis software, analyzes a map by displaying whether the bolt is loosened and loosed through real-time measured values and sends out an early warning signal according to the loosening degree.
Further, the terminal sensor 1 comprises a magnetic encoder 11 for measuring the back-rotation loosening angle of the bolt and the nut, and a fiber bragg grating sensor 12 for measuring the gap between the blade bolt, the nut clamping piece, the pitch bearing and the blade root flange.
Further, magnetic encoder 11 of terminal sensor comprises encoder body 111 and follow support 112, and encoder body 111 connects the blade root bolt, follows support 112 and connects magnetic encoder rotary part and the fixation nut of fastening blade root bolt in encoder body 111, follows support 112 and can drive magnetic encoder rotary part along with the fixation nut is rotatory, and magnetic encoder 11 records the not hard up rotation angle value of blade root bolt and fixation nut.
Specifically, the magnetic encoder body 111 of the terminal sensor is composed of a shell 1111 made of engineering plastics and used for packaging an angle magnetic encoder 1112, and a hole position is configured at the top of the shell 1111 and used for connecting a rotating component of the angle magnetic encoder 1112 along with the bracket 112; the bottom of the housing 1111 is provided with 2-3p threaded holes for attaching blade bolts.
Specifically, the angle magnetic encoder 1112 in the magnetic encoder body 111 of the terminal sensor is powered by a button-type lithium battery 1114, a ZigBee module 1113 is added, and the magnetic encoder outputs an electric signal to perform ZigBee wireless transmission, and the magnetic encoder and the ZigBee are packaged in the shell 1111.
Specifically, the magnetic encoder following bracket 112 of the terminal sensor is composed of a top tripod 1121, a top pin 1122, a pin 1123, a spring 1124, a clamping leg 1125 and a rubber part 1126, wherein the top tripod 1121 and the top pin 1122 are fixedly welded, the clamping leg 1125 is hinged to the top tripod 1121 through the pin 1123, the spring 1124 is connected with the top tripod 1121 and the clamping leg 1125, and the rubber part 1126 is connected with the clamping leg 1125 in a gluing mode; the top pin 1122 is used to connect the magnetic encoder rotation components in the magnetic encoder 11 of the end sensor, and the clamping leg 1125 and rubber 1126 are used to grip the three faces of the blade bolt retention nut under the tension of the spring 1124.
Further, the gap measuring sensor 12 of the terminal sensor is composed of a fiber bragg grating displacement sensor 121 based on an FBG (fiber bragg grating) and an FBG demodulation module 122, and the fiber bragg grating displacement sensor 121 of the FBG is fixed between a blade root bolt and a nut clamping piece, namely a pitch bearing and a blade root flange, and measures the gap distance between the blade root bolt and the nut clamping piece, namely the pitch bearing and the blade root flange.
Specifically, the FBG fiber bragg grating displacement sensor 121 is parallel to the blade bolt and is adhered between the variable pitch bearing and the blade root flange by industrial glue, the FBG demodulation module 122 is fixed on the blade root manhole plate, and a 485 serial port bus communication mode is adopted between the FBG fiber bragg grating displacement sensor 121 and the blade root flange; the FBG demodulation module 122 is powered by a square lithium battery 123, a ZigBee module 124 is added, the detected displacement is converted into an electric signal to carry out ZigBee wireless transmission, and the electric signal and the ZigBee wireless transmission are packaged in the FBG demodulation module 122.
Further, the cabin communication controller 2 is composed of an industrial gateway, has functions of ZigBee signal receiving and Ethernet, is provided with an RJ45 network port, is used for receiving monitoring data of the terminal sensor 1 in the wind wheel, and is connected into a communication ring network of the wind power plant unit to perform data transmission in a TCP/IP mode.
Furthermore, the user side server 3 of the central control room is composed of an industrial personal computer based on win10, and is configured with professional analysis software to store and process the feedback data of the terminal sensor 1 in the ring network.
Specifically, the central control room user side server 3 displays a map of values of loosening angles of bolts and nuts of the blade root and distance values of gaps between the clamped part, the variable pitch bearing and the blade root flange, analyzes, compares and stores whether data of the terminal sensor 1 exceed a set angle and a distance threshold value, and sends out bolt loosening early warning information if the data exceed the set angle and the distance threshold value, so that operation and maintenance personnel are informed to carry out fixed-point maintenance on the loosened bolts.
Specifically, the central control room user side server 3 has the function of resetting the terminal sensor 1 to zero, and is used for resetting the measurement value after the terminal sensor is detached and mounted again when the bolt is loosened.
The present embodiment provides a monitoring method of the monitoring device for monitoring bolt loosening according to embodiment 1, including the steps of:
(1) arranging the terminal sensors 1 in the front edge and rear edge regions where the wind power blade bolts are frequently damaged, wherein the specific number is based on the number covering the damage history of the blade root bolts of the specific type of the wind power plant;
(2) sequentially assembling the magnetic encoder 11 of the terminal sensor 1 on a bolt and a nut at a blade root, installing the gap measuring sensor 12 of the terminal sensor 1 between a variable-pitch bearing corresponding to the position of the bolt and a flange of the blade root and on a manhole plate near the blade root, installing a cabin communication controller 2 on a cabin control cabinet, accessing a communication ring network of a wind power plant unit through an RJ45 net port, and finally installing a user server 3 of a central control room in a central control room of a booster station of the wind power plant and accessing the communication ring network of the wind power plant unit through an RJ45 net port. The terminal sensor 1 monitors real-time data, firstly, the real-time data are wirelessly transmitted to a cabin communication controller 2 with a ZigBee receiver through ZigBee modules 1113 and 124 configured by a magnetic encoder 11 and a fiber bragg grating sensor 12, secondly, the cabin communication controller 2 processes the data and transmits the real-time data to a wind power plant unit communication ring network in a TCP/IP mode, and finally, the real-time data are acquired by a user side server 3 of a central control room in the wind power plant unit communication ring network and are subjected to data processing, display and loosening early warning;
(3) and the central control room user side server 3 collects and displays the data map of the terminal sensor 1 in real time, judges whether the data of the terminal sensor 1 exceeds a set angle and a distance threshold value, gives out early warning information according to needs, timely informs operation and maintenance personnel to accurately overhaul a blade root bolt, and after the overhaul, the central control room user side server 3 executes the re-calibration zero-setting.
Further, in the step (2), the magnetic encoder 11 of the terminal sensor 1 records the loosening angle of the bolt and the fixed nut of the blade root, the gap measuring sensor 12 of the terminal sensor 1 records the increase of the gap between the clamping piece, the pitch bearing and the flange of the blade root, caused by the loosening of the bolt and the nut, and simultaneously can record the special working condition of the loosening angle which is not identified by the magnetic encoder 11 of the terminal sensor 1 and is caused by the sudden breakage of the bolt of the blade root, catch the increase of the gap between the pitch bearing and the flange of the blade root after the bolt is broken in time, and accurately reflect the running state of the bolt and the nut.
Further, the angle and distance threshold in the step (3) is used for testing the relative counter-rotation angle value of the bolt and the nut when the pre-tightening force of the blade bolts with different specifications does not meet the design requirement through experiments, and recording the increment value of the gap of the clamped part at the moment and calibrating the increment value as the loosening threshold of the bolt of the type.
Furthermore, after the root bolt is loosened in the step (3), the operation and maintenance personnel only need to disassemble the loosened bolt and two bolts nearby the loosened bolt from the magnetic encoder 11 of the terminal sensor 1, namely manually opening the following support 112 in the magnetic encoder 11 of the terminal sensor 1, then manually screwing out the body 111 in the magnetic encoder 11, the gap measuring sensor 12 of the terminal sensor 1 does not need to be disassembled because the striking torque is not affected, then striking the torque to recover the pretightening force of the root bolt, then repeatedly installing the magnetic encoder 11 of the terminal sensor 1, and finally re-calibrating the gap measuring sensor in the user side server 3 of the central control room, so that the whole bolt loosening maintenance process of disassembling, striking the torque and installing is efficient and convenient.
When the device is used, a plurality of terminal sensors 1 can be arranged in the front edge and the rear edge area of the frequent failure of the blade bolt of the wind turbine generator, a single wind turbine generator comprises three blades, three sets of terminal sensors 1 are assembled, then a nacelle communication controller 2 is assembled on a nacelle control cabinet of the single wind turbine generator, the loosening monitoring data of the three blade bolts of the set are collected and are connected into a wind turbine generator communication ring network, the other wind turbine generators are assembled with the terminal sensors 1 and the nacelle communication controller 2 in the same way and in the same quantity, finally a central control room user terminal server 3 is installed in a central control room of a wind turbine generator booster station, is connected into the wind turbine generator communication ring network of the wind turbine generator, receives the loosening monitoring data of the blade bolts of all the wind turbine generators, processes the data, displays the loosening angle value of the bolts and the distance between a clamped part, a pitch bearing and a blade root flange, and an alarm is given for the loosened bolt.
The utility model discloses the implementation process adopts the equipment low price, the assembly is easy and simple to handle with the maintenance, do not influence former blade bolt auxiliary structure and assembly relation, sensor lithium battery powered, data wireless transmission does not rely on and influences the interior major control system of change oar system and cabin in the former unit wind wheel, can realize the not hard up monitoring of whole wind-powered electricity generation system blade bolt, in time accurate discovery bolt becomes flexible trouble, implement accurate maintenance processing, it then exempts from the maintenance mode not to report to the police to open the blade bolt, reduce bolt maintenance work manpower and materials cost, effectively avoid the bolt not hard up simultaneously, fracture processing does not in time cause the fracture of change oar bearing, the blade emergence of the accident that falls, the productivity effect of wind power generation enterprise has been improved greatly.
The beneficial effects of the utility model still lie in:
(1) the utility model obtains the bolt pre-tightening state by measuring two key physical quantities, namely the relative angle between the blade bolt and the fixed nut and the gap distance between the clamped parts, and has simple realization and accurate measurement;
(2) the utility model adopts the advantages that the sensor has low price, convenient installation and disassembly and no change of the original bolt pair structure and the assembly relation;
(3) the utility model adopts the terminal sensor to realize the power supply of the lithium battery, realizes the wireless transmission between the wind wheel and the engine room by the signal transmission, and solves the problem of difficult communication between the wind wheel and the engine room without influencing the variable pitch system in the wind wheel and the main control system in the engine room of the original unit;
(4) the utility model discloses to reform transform the current plan maintenance mode of blade bolt, realize that the blade bolt does not report to the police then non-maintaining's accurate maintenance mode, effectively reduce wind turbine generator system key position bolt cost of overhaul.
The above description is only for the preferred embodiment of the present invention, and not intended to limit the present invention in any way, and those skilled in the art can make various modifications, equivalent changes and modifications using the above-described technical content, all of which fall within the scope of the present invention.
Claims (8)
1. The utility model provides a monitoring devices for monitoring bolt looseness state which characterized in that, is including the terminal sensor, communication controller and the central control room server that connect gradually, wherein:
the terminal sensor comprises a magnetic encoder and a gap measuring sensor, the magnetic encoder is used for measuring the relative angle between the bolt to be measured and the fixing nut, and the gap measuring sensor is used for recording the gap increment of the clamped part caused by the loosening of the bolt to be measured;
the communication controller is used for transmitting data acquired by the terminal sensor to the central control room server;
the central control room server comprises a display and a controller, the display is used for displaying angle data and gap distance data collected by the terminal sensor, and the controller is used for judging whether the collected data exceed a preset angle and distance threshold value and sending out early warning information according to a judgment result.
2. The device for monitoring the bolt loosening state according to claim 1, wherein the magnetic encoder comprises an encoder body and a following support, the encoder body is used for being connected to the end portion of the bolt to be detected, the following support comprises a top support and a plurality of clamping legs connected with the top support, the plurality of clamping legs are used for fastening a fixing nut of the bolt to be detected, the top support is connected with the top of the encoder, the following support can rotate along with the fixing nut and drive the magnetic encoder to rotate, and the encoder body records the loosening rotation angle value of the bolt to be detected and the fixing nut.
3. The device as claimed in claim 2, wherein the encoder body comprises a housing and an angular magnetic encoder inside the housing, the top of the housing is provided with a hole site, the top bracket is provided with a top pin fitted with the hole site, and the bottom of the housing is provided with a threaded hole for fitting to a bolt to be tested.
4. The monitoring device for monitoring the bolt loosening state according to claim 3, wherein a lithium battery and a ZigBee module are further arranged in the shell, and the ZigBee module is used for carrying out ZigBee wireless transmission on the electric signal output by the angle magnetic encoder.
5. The device according to claim 2, wherein a rubber member is connected to an inner side of each of the clamping legs;
and/or the top bracket is hinged with each clamping leg through a pin;
and/or, a spring connected between the clamping leg and the top bracket for enabling the clamping leg to clamp the fixing nut through the tension of the spring.
6. The monitoring device for monitoring the bolt loosening state according to any one of claims 1 to 5, wherein the gap measuring sensor comprises an FBG-based fiber bragg grating sensor and an FBG demodulation module, the fiber bragg grating sensor is used for being fixed between the bolt to be detected and the nut clamping piece, and the fiber bragg grating sensor and the FBG demodulation module are connected through a serial port bus;
and/or, the clearance measuring sensor also comprises a lithium battery and a ZigBee module, and the ZigBee module is used for carrying out ZigBee wireless transmission on the displacement change.
7. The monitoring device for monitoring bolt loosening state according to any one of claims 1 to 5, wherein the central control room server further comprises a memory and/or a zeroing module.
8. Wind turbine comprising a monitoring device for monitoring bolt loosening according to any of claims 1 to 7, wherein,
the magnetic encoder is used for measuring the relative angle between the blade root bolt to be measured and the fixing nut, and the gap measuring sensor is used for recording the increment of the gap between the variable pitch bearing and the blade root flange caused by the looseness of the blade root bolt to be measured.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022613133.XU CN214247577U (en) | 2020-11-12 | 2020-11-12 | Monitoring device for monitoring bolt loosening state and wind turbine generator |
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| CN202022613133.XU CN214247577U (en) | 2020-11-12 | 2020-11-12 | Monitoring device for monitoring bolt loosening state and wind turbine generator |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112267981A (en) * | 2020-11-12 | 2021-01-26 | 龙源（北京）风电工程技术有限公司 | Monitoring device and monitoring method for monitoring bolt loosening state and wind turbine generator |
| CN114659773A (en) * | 2022-03-21 | 2022-06-24 | 华能西藏雅鲁藏布江水电开发投资有限公司 | Machine set top cover bolt fracture monitoring method and monitoring system |
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2020
- 2020-11-12 CN CN202022613133.XU patent/CN214247577U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112267981A (en) * | 2020-11-12 | 2021-01-26 | 龙源（北京）风电工程技术有限公司 | Monitoring device and monitoring method for monitoring bolt loosening state and wind turbine generator |
| CN114659773A (en) * | 2022-03-21 | 2022-06-24 | 华能西藏雅鲁藏布江水电开发投资有限公司 | Machine set top cover bolt fracture monitoring method and monitoring system |
| CN114659773B (en) * | 2022-03-21 | 2024-05-28 | 华能西藏雅鲁藏布江水电开发投资有限公司 | Unit top cover bolt fracture monitoring method and monitoring system |
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Address after: F17, Block C, International Investment Building, No. 6-9, Fuchengmen North Street, Xicheng District, Beijing 100,034 Patentee after: Longyuan (Beijing) New Energy Engineering Technology Co.,Ltd. Address before: 100034 11th floor, block C, international investment building, 6-9 Fuchengmen North Street, Xicheng District, Beijing Patentee before: LONGYUAN (BEIJING) WIND POWER ENGINEERING TECHNOLOGY Co.,Ltd. |