CN211477589U - Device for monitoring health state of fan blade - Google Patents
Device for monitoring health state of fan blade Download PDFInfo
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- CN211477589U CN211477589U CN201921990444.9U CN201921990444U CN211477589U CN 211477589 U CN211477589 U CN 211477589U CN 201921990444 U CN201921990444 U CN 201921990444U CN 211477589 U CN211477589 U CN 211477589U
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 27
- 230000036541 health Effects 0.000 title claims abstract description 15
- 239000002131 composite material Substances 0.000 claims abstract description 4
- 238000012545 processing Methods 0.000 claims description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 10
- 239000010959 steel Substances 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 7
- 230000000712 assembly Effects 0.000 claims description 6
- 238000000429 assembly Methods 0.000 claims description 6
- 239000011152 fibreglass Substances 0.000 claims description 3
- 238000009413 insulation Methods 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 description 9
- 239000000523 sample Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000003086 colorant Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000012806 monitoring device Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000003862 health status Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
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Abstract
The utility model discloses a device for monitoring the health state of fan blades, which belongs to the technical field of intelligent fan monitoring, the edges of a first blade and a second blade are connected to form a hollow cavity, PZT sensor components are respectively arranged on the first blade and the second blade, and 8 sensors are pasted on each surface of each of the first blade and the second blade, 16 sensors are distributed on the stress sensitive parts of the first blade and the second blade, thereby improving the accuracy of judging the damage position, facilitating the comprehensive monitoring of the vibration load of the blade root, the blade leaf and the blade tip of the fan blade, transmitting the vibration load value to an on-line monitoring system, identifying the damage of the fan blade through vibration signals, detecting the state of the blade more comprehensively, and simultaneously, the first blade and the second blade which are made of composite materials have good electric insulation performance, the fan blade is not easy to be struck by lightning, is light in weight and greatly prolongs the service life of the fan blade.
Description
Technical Field
The utility model belongs to the technical field of intelligent fan control, concretely relates to monitor fan blade health status's device.
Background
The wind turbine blade is one of the most basic and the most critical parts of a wind turbine, and can convert wind energy into mechanical energy under the driving of wind. In the operation process of the fan blade, due to the fact that outdoor loads are complex and various, particularly offshore wind power development, the number and frequency of the encountered typhoon grades can be greatly increased, and accumulated damage or sudden damage can be easily caused to the fan blade. Meanwhile, the fan blade is twisted or broken and damaged due to long-term overload operation or super-load impact of the fan blade.
Prior art's fan blade monitoring device, set up scanning probe at the top of fan pole usually, utilize scanning probe scanning fan blade's characteristic and parameter, and different colours show on the display, but hardly realize whole regional detection discernment to large-scale fan blade, by its fan blade at the megawatt level, length can reach tens meters, can only realize the detection of local scope, it is not comprehensive enough to detect, can not comprehensive inspection, the detection effect still can receive ultrasonic probe detection angle's influence simultaneously, the monitoring area has the limitation.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: the utility model provides a device of monitoring fan blade health, has solved the above-mentioned problem that prior art exists.
The technical scheme is as follows: an apparatus for monitoring the health of a fan blade comprising; first blade, and first blade
The second blades are symmetrically arranged; the edge of first blade and second blade is the arc, the edge of first blade and second blade links together and forms a hollow cavity, the inside fixed mounting of cavity has PZT sensor assembly, PZT sensor assembly and on-line monitoring system electric connection.
In a further example, a group of PZT sensor assemblies is respectively arranged on the arc-shaped inner surfaces of the first blade and the second blade, and the two groups of PZT sensor assemblies are respectively arranged on the stress deformation sensitive parts of the first blade and the second blade and can monitor the vibration state of the fan blade.
In a further example, the PZT sensor assembly includes a first root sensor fixedly mounted to the first blade root, three second root sensors fixedly mounted to the first blade and positioned to the right of the first root sensor, a lobe sensor fixedly mounted to the first blade and positioned to the right of the second root sensor, and a tip sensor fixedly mounted to the first blade and positioned to the right of the lobe sensor.
In a further example, the line monitoring system includes a data acquisition and processing unit electrically connected to the PZT sensor assembly, a damage identification unit electrically connected to the data acquisition and processing unit, and a safety unit electrically connected to the damage identification unit.
In a further example: the edge of the first blade is provided with a fixing device, the fixing device comprises a plurality of fixed right buckles arranged at the edge of the first blade, a sealing strip sleeved on the fixed right buckles and the bottom of which is attached to the edge of the first blade, and buckle holes fixedly arranged at the edge of the second blade and matched with the fixed right buckles.
In a further example, the fixing snap comprises a shell fixedly installed in a cylindrical hollow structure of the first blade design, an elastic piece arranged in the shell, and a steel ball with the outer surface contacting with one end of the elastic piece and axially and rotatably matched with the shell at one end.
In a further example, the first and second blades are fabricated from composite fiberglass reinforced plastic.
Has the advantages that: a device for monitoring the health state of fan blades is characterized in that a first blade and a second blade are designed into a symmetrical structure, the edges of the first blade and the second blade are connected to form a hollow cavity, PZT sensor assemblies are respectively arranged on the first blade and the second blade, 8 sensors are attached to each surface of each of the first blade and the second blade, 16 sensors are distributed on stress sensitive parts of the first blade and the second blade in total, the accuracy of judging damage positions is improved, the vibration loads of a blade root, a blade leaf and a blade tip of a fan blade can be conveniently and comprehensively monitored, the vibration load value is transmitted to an online monitoring system, the damage of the fan blade is identified through vibration signals, the state of the detected blade is more comprehensive, and meanwhile, the first blade and the second blade which are made of composite materials are good in electrical insulation performance, the fan blade is not easy to be struck by lightning, is light in weight and greatly prolongs the service life of the fan blade.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a cross-sectional view of a first blade according to the present invention.
Fig. 3 is a cross-sectional view of a second blade according to the present invention.
Fig. 4 is a partial enlarged view of the present invention.
The figures are numbered: the device comprises a first blade 1, a second blade 2, a cavity 3, a PZT sensor assembly 4, an online monitoring system 5, a data acquisition and processing unit 501, a damage identification unit 502, a safety unit 503, a first blade root sensor 101, a second blade root sensor 102, a blade leaf sensor 103, a blade tip sensor 104, a fixing device 6, a fixing right buckle 7, a buckle hole 8, a shell 9, an elastic piece 10, a steel ball 11 and a sealing strip 12.
Detailed Description
Through the research and analysis of the applicant, the fan blade monitoring device in the prior art generally sets up the scanning probe at the top of the fan pole, utilize the scanning probe to scan the characteristics and the parameter of fan blade, and different colours show on the display, but it is difficult to realize the detection discernment in whole region to large-scale fan blade, by its fan blade at megawatt level, length can reach tens meters, can only realize the detection of local scope, detect not comprehensive enough, can not comprehensive inspection, the detection effect still can receive the influence of ultrasonic probe detection angle simultaneously, the region of detection has certain limitation. In response to these problems, applicants have proposed an apparatus for monitoring the health of a fan blade.
As shown in fig. 1 to 3: a device for monitoring the health state of a fan blade comprises a first blade 1, a second blade 2, a PZT sensor assembly 4, an online monitoring system 5, a fixing device 6 and the like.
The device comprises a first blade 1, a second blade 2, a cavity 3, a PZT sensor assembly 4 and an online monitoring system 5, wherein the edges of the first blade 1 and the second blade 2 are connected together, the edges of the first blade 1 and the second blade 2 are arc-shaped, when the first blade 1 and the second blade 2 are connected together, a hollow cavity 3 is formed in the middle, the PZT sensor assembly 4 is arranged in the cavity 3, the inner space of the cavity 3 is reasonably utilized, the traditional design of the whole structure is changed, the fan blade is divided into the first blade 1 and the second blade 2, the first blade 1 and the second blade 2 are of a symmetrical structure, the space utilization rate of the cavity 3 is improved, the online monitoring system 5 is electrically connected with the PZT sensor assembly 4, and the state of the fan blade is monitored completely, the stress deformation sensitive parts of the first blade 1 and the second blade 2 are positioned in the first blade 1 and each blade surface of the second blade 2, a group of PZT sensor assemblies 4 are respectively arranged in the first blade 1 and each blade surface of the second blade 2, so that the vibration states of the first blade 1 and the second blade 2 can be conveniently and comprehensively monitored, and the monitoring comprehensiveness is improved.
The PZT sensor assembly 4 comprises a first root sensor 101, a second root sensor 102, a lobe sensor 103 and a tip sensor 104; the first blade root sensor 101 is fixedly installed together with the first blade 1 and is positioned at the heel position of the first blade 1, the second blade root sensor 102 is fixedly installed on the first blade 1 and is positioned at the right side of the first blade root sensor, the in-blade sensor 103 is fixedly installed on the first blade 1 and is positioned at the right side of the second blade root sensor 102, the tip sensor 104 is fixedly installed on the first blade 1 and is positioned at the right side of the in-blade sensor 103, the installation intervals of the first blade root sensor 101, the second blade root sensor 102, the in-blade sensor 103 and the tip sensor 104 are equal, three second blade root sensors 102 are arranged at the right side of the first blade root sensor in the width direction of the first blade 1, and the intervals of the three second blade root sensors 102 are equal, by attaching 8 sensors to each surface of the first blade 1 and the second blade 2, 16 sensors are totally arranged, so that the vibration states of the blade root, the blade leaf and the blade tip of the fan blade can be monitored more comprehensively, and the monitoring positions are more detailed and comprehensive.
The line monitoring system comprises a data acquisition and processing unit 501, a damage identification unit 502 and a safety unit 503; the data acquisition and processing unit 501 is electrically connected with the PZT sensor assembly 4, the damage identification unit 502 is electrically connected with the data acquisition and processing unit 501, and the safety unit 503 is electrically connected with the damage identification unit 502; the PZT sensor assembly 4 is used for sensing effect information generated by the external environment action of the fan blade, automatically acquiring non-electric quantity signals, transmitting the non-electric quantity signals to the data acquisition and processing unit 501 for analysis and processing by the data acquisition and processing unit 501, acquiring data of the PZT sensor assembly 4 on the surface of the fan, analyzing the data and further judging the health state of the fan blade.
Because the traditional integral blade is changed into a split type, the first blade 1 and the second blade 2 are conveniently and conveniently installed together, and the fixing device 6 is arranged at the edge of the first blade 1.
The fixing device 6 comprises a fixed right buckle 7, a sealing strip 12 and a buckle hole 8, the fixed right buckle 7 is fixedly installed on the first blade 1 and is positioned at the edge of the first blade 1, the sealing strip 12 is sleeved on the fixed right buckle 7, the bottom of the sealing strip is attached to the edge of the first blade 1, the buckle hole 8 is arranged on the second blade 2 and is positioned at the edge of the second blade 2, meanwhile, the buckle hole 8 is matched with the fixed right buckle 7, the fixed right buckle 7 comprises a shell 9, an elastic element 10 and a steel ball 11, the shell 9 is fixedly installed on the first blade 1, the shell 9 is designed into a cylindrical hollow structure, the elastic element 10 is arranged inside the shell 9, the outer surface of the steel ball 11 is attached to and contacted with one end of the elastic element 10, and the axial direction of the steel ball 11 is matched with the shell 9 in a rotating way, one end through elastic component 10 with 11 contacts of steel ball are in the same place to surface and the adaptation of detaining hole 8 through casing 9, and steel ball 11 has played the guide effect when first blade 1 and second blade 2 lock, reach spacing steel ball 11 and just in time block, the installation is more swift, the extrusion deformation when the sealing strip 12 of laminating in first blade 1 edge passes through first blade 1 and the installation of second blade 2 simultaneously, the leakproofness in the external environment has been guaranteed, the inside components and parts of cavity 3 have been protected.
As the preferred scheme, first blade 1 and second blade 2 select combined material glass fiber reinforced plastics to make and form, and light than ordinary material weight that accords with, have the performance of height slight, great improvement the life-span of blade, corrosion resistance is high, and simultaneously electric insulating properties is good, and thermal insulation is good, resistant instantaneous high temperature, and the material looks for the look easily, can see through the electromagnetic wave.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. The invention is not described in detail in order to avoid unnecessary repetition.
Claims (7)
1. A device for monitoring the health of a fan blade, comprising; the first blade and the second blade are symmetrically arranged; the edge of first blade and second blade is the arc, the edge of first blade and second blade links together and forms a hollow cavity, the inside fixed mounting of cavity has PZT sensor assembly, PZT sensor assembly and on-line monitoring system electric connection.
2. The device for monitoring the health of a fan blade of claim 1, wherein the curved inner surfaces of the first and second blades are each provided with a set of PZT sensor assemblies, and the PZT sensor assemblies are respectively disposed at stress deformation sensitive portions of the first and second blades and are capable of monitoring the vibration state of the fan blade.
3. The device of claim 1, wherein the health of the fan blade is selected from the group consisting of: the PZT sensor assembly includes a first root sensor fixedly mounted to the first blade root, three second root sensors fixedly mounted to the first blade and positioned to the right of the first root sensor, a leaf sensor fixedly mounted to the first blade and positioned to the right of the second root sensor, and a tip sensor fixedly mounted to the first blade and positioned to the right of the leaf sensor.
4. The device of claim 1, wherein the wire monitoring system comprises a data acquisition and processing unit electrically connected to the PZT sensor assembly, a damage identification unit electrically connected to the data acquisition and processing unit, and a safety unit electrically connected to the damage identification unit.
5. The device of claim 1, wherein the health of the fan blade is selected from the group consisting of: the edge of the first blade is provided with a fixing device, the fixing device comprises a plurality of fixed right buckles arranged at the edge of the first blade, a sealing strip sleeved on the fixed right buckles and the bottom of which is attached to the edge of the first blade, and buckle holes fixedly arranged at the edge of the second blade and matched with the fixed right buckles.
6. The device of claim 5, wherein the health of the fan blade is selected from the group consisting of: the fixed right buckle comprises a shell which is fixedly installed on the first blade and has a cylindrical hollow structure, an elastic piece is arranged in the shell, and a steel ball is arranged at one end of the shell, wherein the outer surface of the elastic piece is in fit contact with one end of the elastic piece, and the steel ball is axially matched with the shell in a rotating mode.
7. The device of claim 1, wherein the health of the fan blade is selected from the group consisting of: the first blade and the second blade are made of composite material glass fiber reinforced plastics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921990444.9U CN211477589U (en) | 2019-11-18 | 2019-11-18 | Device for monitoring health state of fan blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921990444.9U CN211477589U (en) | 2019-11-18 | 2019-11-18 | Device for monitoring health state of fan blade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211477589U true CN211477589U (en) | 2020-09-11 |
Family
ID=72362946
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921990444.9U Expired - Fee Related CN211477589U (en) | 2019-11-18 | 2019-11-18 | Device for monitoring health state of fan blade |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211477589U (en) |
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2019
- 2019-11-18 CN CN201921990444.9U patent/CN211477589U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200911 |