CN113804150A - Fan blade capable of detecting internal damage of material based on sensing optical fiber - Google Patents
Fan blade capable of detecting internal damage of material based on sensing optical fiber Download PDFInfo
- Publication number
- CN113804150A CN113804150A CN202111063873.3A CN202111063873A CN113804150A CN 113804150 A CN113804150 A CN 113804150A CN 202111063873 A CN202111063873 A CN 202111063873A CN 113804150 A CN113804150 A CN 113804150A
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- China
- Prior art keywords
- sensing optical
- fan blade
- glass
- optical fiber
- glass tube
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 51
- 239000000463 material Substances 0.000 title claims abstract description 18
- 239000011521 glass Substances 0.000 claims abstract description 119
- 238000001514 detection method Methods 0.000 claims abstract description 22
- 238000005259 measurement Methods 0.000 claims abstract description 5
- 239000010410 layer Substances 0.000 claims description 17
- 239000011241 protective layer Substances 0.000 claims description 11
- 239000011347 resin Substances 0.000 claims description 4
- 229920005989 resin Polymers 0.000 claims description 4
- 230000006698 induction Effects 0.000 abstract description 2
- 239000002131 composite material Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000835 fiber Substances 0.000 description 3
- 238000007689 inspection Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000001931 thermography Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/32—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring the deformation in a solid
-
- 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
-
- 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
- F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Sustainable Energy (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Sustainable Development (AREA)
- General Physics & Mathematics (AREA)
- Pathology (AREA)
- Immunology (AREA)
- General Health & Medical Sciences (AREA)
- Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- Analytical Chemistry (AREA)
- Optical Transform (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a fan blade capable of detecting internal damage of a material based on sensing optical fibers, which comprises a fan blade and a detection mechanism, wherein the detection mechanism comprises a plurality of converters, a plurality of sensing optical fibers, a plurality of first glass tubes, a plurality of second glass tubes and a strain measurement device; each sensing optical fiber is connected with a plurality of converters in series, and one end of each sensing optical fiber is connected with the input end of the strain measuring device; a plurality of first glass pipes and a plurality of second glass pipe set up alternately and inlay and establish in fan blade, and the intraductal air that all fills of a plurality of first glass, the intraductal vacuum state that is of a plurality of second glass, the converter one-to-one contacts with the second glass pipe. According to the invention, the plurality of first glass tubes and the plurality of second glass tubes are embedded in the fan blade, so that when the fan blade is internally damaged, the strain measuring device can be positioned at the position of the internal damage of the fan blade through the induction of the converter and the sensing optical fiber to the second glass tubes.
Description
Technical Field
The invention relates to the field of fan blade defect detection, in particular to a fan blade capable of detecting internal damage of a material based on a sensing optical fiber.
Background
Wind power generation is a clean energy source and is widely applied all over the world. In order to reduce the weight of the fan, improve the strength of the blades and improve the efficiency of the fan, the existing fan blades are all of thin shell structures, and more than 90% of the weight of the fan blades are made of composite materials. The fan blade can cause the internal damage of the composite material due to the severe working environment and the complex and changeable working conditions. The blades are routinely maintained regularly to avoid accidents that cause significant economic losses. Detection and monitoring are usually combined to prevent accidents.
At present, the detection of the fan blade can be classified into production quality detection and service blade detection. Production quality inspection is often performed on blades in the production process, and the inspection is easy to operate. However, the detection of the service blade is difficult and more important. The detection methods of the blades of the service fans commonly used at present can be divided into two types: one type is nondestructive detection technologies such as ultrasonic waves, acoustic emission, infrared thermal imaging and the like, but all the methods need to perform related detection on the blade after the fan is shut down regularly, but the existing methods cannot perform real-time online detection on the blade.
Disclosure of Invention
The invention aims to provide a fan blade capable of detecting internal damage of a material based on a sensing optical fiber, which can automatically perform online detection on the internal damage of the blade in service so as to solve the problems in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
a fan blade capable of detecting internal damage of a material based on sensing optical fibers comprises a fan blade and a detection mechanism, wherein the detection mechanism comprises a plurality of converters, a plurality of sensing optical fibers, a plurality of first glass tubes, a plurality of second glass tubes and a strain measurement device; the sensing optical fibers are arranged in parallel and embedded in the fan blade, a plurality of converters are connected to each sensing optical fiber in series, and one end of each sensing optical fiber is connected with the input end of the strain measuring device; a plurality of first glass pipe and a plurality of second glass pipe are alternately arranged and are inlayed and established in the fan blade, and is a plurality of all pack has the air in the first glass pipe, and is a plurality of be vacuum state in the second glass pipe, it is a plurality of the converter one-to-one with a plurality of the second glass pipe contacts.
Preferably, the plurality of sensing optical fibers are arranged along the length direction of the fan blade, and the plurality of first glass tubes and the plurality of second glass tubes are arranged along the width direction of the fan blade.
Preferably, the fan blade includes an intermediate layer and a laminated plate disposed above and below, the plurality of sensing optical fibers and the plurality of converters are embedded in the intermediate layer, and the plurality of first glass tubes and the plurality of second glass tubes are embedded in the laminated plate.
Preferably, the top of the first glass tube and the top of the second glass tube both extend into the intermediate layer.
Preferably, the cross sections of the first glass tube and the second glass tube are both sinusoidal.
Preferably, the bottom end of the first glass tube and the bottom end of the second glass tube are both flush with the bottom surface of the laminate.
Preferably, the distance between the first glass tube and the second glass tube which are adjacently arranged is the same.
Preferably, the distance between the first glass tube and the second glass tube which are adjacently arranged is H, and the distance between two adjacent converters along the sensing optical fiber direction is 2H.
Preferably, at least one end of the first glass tube is open to the atmosphere.
Preferably, a protective layer is further arranged above the middle layer, and the protective layer is a transparent resin protective layer.
The invention has the beneficial effects that: according to the invention, the plurality of first glass tubes and the plurality of second glass tubes are embedded in the fan blade, so that when the fan blade is internally damaged, the strain measuring device can be positioned at the internal damage position of the fan blade through the induction of the converter and the sensing optical fiber on the second glass tubes, and the automatic online detection of the material damage inside the service blade is realized.
Drawings
The drawings are further illustrative of the invention and the content of the drawings does not constitute any limitation of the invention.
FIG. 1 is a schematic view of the internal structure of the present invention;
FIG. 2 is a schematic view of the internal structure of a fan blade according to the present invention when internal damage occurs.
Wherein: 1. a laminate; 2. an intermediate layer; 3. a protective layer; 4. a converter; 5. a sensing optical fiber; 6. a first glass tube; 7. a second glass tube; 8. a strain measuring device; 9. a damaged space; 10. a broken first glass tube; 11. a broken second glass tube.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
The fan blade capable of detecting the internal damage of the material based on the sensing optical fiber comprises a fan blade and a detection mechanism, wherein the detection mechanism comprises a plurality of converters 4, a plurality of sensing optical fibers 5, a plurality of first glass tubes 6, a plurality of second glass tubes 7 and a strain measurement device 8; the sensing optical fibers 5 are arranged in parallel and embedded in the fan blade, a plurality of converters 4 are connected in series on each sensing optical fiber 5, and one end of each sensing optical fiber 5 is connected with the input end of a strain measuring device 8; a plurality of first glass pipe 6 and a plurality of second glass pipe 7 set up and inlay in fan blade mutually, all pack in a plurality of first glass pipe 6 has the air, is vacuum state in a plurality of second glass pipe 7, and a plurality of converters 4 one-to-one contact with a plurality of second glass pipe 7.
This embodiment is through at the embedded a plurality of first glass pipe 6 and the second glass pipe 7 of establishing of fan blade to when fan blade internal damage appears, make strain measurement device 8 can fix a position fan blade's internal damage position through converter 4 and sensing optical fiber 5 to the response of second glass pipe 7, realize carrying out on-line measuring to the material damage of serving the inside blade automatically.
The detection principle of the embodiment is as follows: referring to fig. 2, when the composite laminate 1 of the fan blade is damaged, the first glass tube 6 and the second glass tube 7 positioned in the composite laminate 1 are broken to form a broken first glass tube 10 and a broken second glass tube 11, respectively. At this time, the air in the broken first glass tube 10 is transmitted to the broken second glass tube 11 through the damaged space 9 inside the composite laminated plate 1, so that the broken second glass tube 11 is also filled with air, the air pressure in the broken second glass tube 11 is changed from a vacuum state to the same as the atmospheric pressure, when the pressure in the broken second glass tube 11 is changed, the transducer 4 which is in contact with the broken second glass tube 11 converts the pressure change into the axial strain in the sensing optical fiber 5, and the axial strain is transmitted to the strain measuring device 8 through the sensing optical fiber 5, so that the strain measuring device 8 can quickly identify the positions of the transducer 4 and the sensing optical fiber 5 where the pressure change occurs, thereby locating the damaged position in the fan blade.
Preferably, a plurality of sensing optical fibers 5 are arranged along the length direction of the fan blade, and a plurality of first glass tubes 6 and a plurality of second glass tubes 7 are arranged along the width direction of the fan blade.
A plurality of first glass pipe 6 and a plurality of second glass pipe 7 all set up along fan blade's width direction to make fan blade go up evenly arranged a plurality of first glass pipe 6 and a plurality of second glass pipe 7, when guaranteeing that fan blade arbitrary department takes place the damage, all can destroy first glass pipe 6 and second glass pipe 7 of this department, thereby can detect the position of taking place the damage fast through the caliber that meets an emergency.
Preferably, the fan blade comprises an intermediate layer 2 and a laminated plate 1 which are arranged up and down, a plurality of sensing optical fibers 5 and a plurality of converters 4 are embedded in the intermediate layer 2, and a plurality of first glass tubes 6 and a plurality of second glass tubes 7 are embedded in the laminated plate 1.
Preferably, the top of the first glass tube 6 and the top of the second glass tube 7 both extend into the intermediate layer 2.
By arranging that the top of the second glass tube 7 extends into the middle layer 2, the second glass tube 7 can touch the converter 4, so that when the fan blade is damaged, the converter 4 can sensitively detect the air pressure change in the second glass tube 7.
Preferably, the cross-sections of the first glass tube 6 and the second glass tube 7 are each sinusoidal.
Preferably, the bottom end of the first glass tube 6 and the bottom end of the second glass tube 7 are flush with the bottom surface of the laminate 1.
The detection positions of the first glass tube 6 and the second glass tube 7 can be derived to the bottom surface of the laminated plate 1, so that the first glass tube 6 and the second glass tube 7 at any position of the fan blade can be damaged when the fan blade is damaged, and the damaged positions can be quickly detected through a strain measurer.
Preferably, the distance between the adjacent first glass tube 6 and the second glass tube 7 is H, the distance between two adjacent transducers 4 along the sensing fiber 5 is 2H, and the distance between two adjacent sensing fibers 5 is W.
Therefore, the damage to the interior of the material is detected through the number and the positions of the first glass tube 6 and the second glass tube 7 which are reasonably arranged, so that the position of the damage position occurring to the interior of the material is more accurately positioned.
Preferably, at least one end of the first glass tube 6 is open to the atmosphere. It is ensured that air in the first glass tube 6 can flow into the second glass tube 7 through the damaged space 9 when the first glass tube 6 is damaged by damage occurring inside the material.
Preferably, a protective layer 3 is further provided above the intermediate layer 2, and the protective layer 3 is a transparent resin protective layer. The transparent resin protective layer 3 is arranged above the intermediate layer 2, so that the surface of the intermediate layer 2 is protected, and the converter 4 or the sensing optical fiber 5 is prevented from being damaged due to the fact that the surface of the intermediate layer 2 is scratched.
The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive effort, which would fall within the scope of the present invention.
Claims (10)
1. The fan blade capable of detecting the internal damage of a material based on the sensing optical fibers is characterized by comprising a fan blade and a detection mechanism, wherein the detection mechanism comprises a plurality of converters, a plurality of sensing optical fibers, a plurality of first glass tubes, a plurality of second glass tubes and a strain measurement device; the sensing optical fibers are arranged in parallel and embedded in the fan blade, a plurality of converters are connected to each sensing optical fiber in series, and one end of each sensing optical fiber is connected with the input end of the strain measuring device; a plurality of first glass pipe and a plurality of second glass pipe are alternately arranged and are inlayed and established in the fan blade, and is a plurality of all pack has the air in the first glass pipe, and is a plurality of be vacuum state in the second glass pipe, it is a plurality of the converter one-to-one with a plurality of the second glass pipe contacts.
2. The blower blade capable of detecting internal damage of a material based on the sensing optical fiber according to claim 1, wherein a plurality of the sensing optical fibers are arranged along a length direction of the blower blade, and a plurality of the first glass tubes and a plurality of the second glass tubes are arranged along a width direction of the blower blade.
3. The fan blade capable of detecting internal damage based on the sensing optical fiber according to claim 1, wherein the fan blade comprises an intermediate layer and a laminated plate which are arranged above and below, a plurality of sensing optical fibers and a plurality of converters are embedded in the intermediate layer, and a plurality of first glass tubes and a plurality of second glass tubes are embedded in the laminated plate.
4. The fan blade capable of detecting internal damage based on the sensing optical fiber according to claim 3, wherein the top of the first glass tube and the top of the second glass tube both extend into the middle layer.
5. The fan blade capable of detecting internal damage based on the sensing optical fiber according to claim 1, wherein the cross section of each of the first glass tube and the second glass tube is sinusoidal.
6. The fan blade capable of detecting internal damage based on the sensing optical fiber according to claim 3, wherein the bottom end of the first glass tube and the bottom end of the second glass tube are flush with the bottom surface of the laminated plate.
7. The fan blade capable of detecting internal damage based on the sensing optical fiber according to claim 1, wherein the distance between the first glass tube and the second glass tube which are adjacently arranged is the same.
8. The fan blade capable of detecting internal damage of a material based on the sensing optical fiber as claimed in claim 1, wherein a distance between the first glass tube and the second glass tube which are adjacently arranged is H, and a distance between two adjacent converters along the direction of the sensing optical fiber is 2H.
9. The fan blade capable of detecting internal damage based on the sensing optical fiber according to claim 1, wherein at least one end of the first glass tube is communicated with the atmosphere.
10. The fan blade capable of detecting internal damage of materials based on the sensing optical fiber as claimed in claim 3, wherein a protective layer is further arranged above the intermediate layer, and the protective layer is a transparent resin protective layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111063873.3A CN113804150B (en) | 2021-09-10 | 2021-09-10 | Fan blade capable of detecting internal damage of material based on sensing optical fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111063873.3A CN113804150B (en) | 2021-09-10 | 2021-09-10 | Fan blade capable of detecting internal damage of material based on sensing optical fiber |
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| Publication Number | Publication Date |
|---|---|
| CN113804150A true CN113804150A (en) | 2021-12-17 |
| CN113804150B CN113804150B (en) | 2024-02-20 |
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| CN202111063873.3A Active CN113804150B (en) | 2021-09-10 | 2021-09-10 | Fan blade capable of detecting internal damage of material based on sensing optical fiber |
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|---|---|---|---|---|
| SE7507247L (en) * | 1974-06-28 | 1975-12-29 | Bbc Sulzer Turbomaschinen | DEVICE FOR MONITORING EROSION WEAR OF GASTURBINE PISTONS. |
| US4135386A (en) * | 1977-12-27 | 1979-01-23 | Continental Oil Company | Porous material crack detection |
| US4600310A (en) * | 1981-03-30 | 1986-07-15 | Imperial Chemical Industries Plc | Optical fibre sensor |
| WO2007112511A1 (en) * | 2006-04-04 | 2007-10-11 | Structural Monitoring Systems Ltd | Method for detecting impact damage in a structure |
| CN101865906A (en) * | 2010-06-02 | 2010-10-20 | 东华大学 | High-sensitivity composite material structure health monitoring system |
| CN103403515A (en) * | 2011-02-15 | 2013-11-20 | 维斯塔斯风力系统集团公司 | System and method for detecting damage to a wind turbine blade |
| CN105258669A (en) * | 2015-11-03 | 2016-01-20 | 南京电力工程设计有限公司 | Simulation test device of sedimentation post-treatment of rain pipe in sea silt and method |
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-
2021
- 2021-09-10 CN CN202111063873.3A patent/CN113804150B/en active Active
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| CN113804150B (en) | 2024-02-20 |
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