CN206369617U - A kind of pneumatic equipment bladess damage active self-checking unit - Google Patents
A kind of pneumatic equipment bladess damage active self-checking unit Download PDFInfo
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- CN206369617U CN206369617U CN201621478209.XU CN201621478209U CN206369617U CN 206369617 U CN206369617 U CN 206369617U CN 201621478209 U CN201621478209 U CN 201621478209U CN 206369617 U CN206369617 U CN 206369617U
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Abstract
A kind of pneumatic equipment bladess damage active self-checking unit, including multiple swept frequency excitation piezoelectric ceramic pieces, are arranged on inside pneumatic equipment bladess, and each swept frequency excitation piezoelectric ceramic piece after A/D modular converters through signal cable by connecting；Multiple signal measurement piezoelectric ceramic pieces, it is arranged on inside pneumatic equipment bladess, quantity is corresponding with swept frequency excitation piezoelectric ceramic piece, used in pairs close to swept frequency excitation piezoelectric ceramic piece, and be connected with voltage amplification module, A/D modular converters and wireless transmitter module, wherein wireless transmission mode can also be replaced with signal cable；Wire/wireless signal receives transmitter module, in wheel hub, and the signal of wireless transmitter module output is connected or received with signal cable；Data processing module, receives transmitter module with wire/wireless signal and is connected, and be connected on central control system/computer of the incoming monitoring of the data/address bus of cabin；The utility model realizes wind turbine blade regardless of whether operation, can complete the unmanned process of self-test of blade injury.
Description
Technical field
The utility model belongs to technical field of wind power generation, more particularly to a kind of pneumatic equipment bladess damage active self-inspection dress
Put.
Background technology
Pneumatic equipment bladess are one of parts very crucial in whole Wind turbines equipment, and the quality of its performance and quality will
Directly determine whether whole unit being capable of reliability service.When accident occurs for blade, wind power plant, which must stop generating electricity, to be carried out
Repairing, is even needed to change blade when failure is serious, therefore generates the maintenance cost of great number, and pole is brought to wind power plant
Big economic loss.If when locally microlesion occurs for blade, these defects can be found in time, targetedly
Repaired, extension blade service life, reduction wind power plant maintenance cost are had very important significance.
The extension of blade cracks is the topmost factor for causing pneumatic equipment bladess to fail, and the generation of blade cracks can not be kept away
Exempt from, generally can occur after unit operation 1 year.Wind load excitation, startup-shutdown, self-vibration, thunderbolt the sleet grains of sand all can be in difference
Deepen the length of crackle in degree.Therefore, the detection of Crack Damage is very important, traditional blade injury detection method pair
The requirement of detection environment and condition it is very harsh, it is necessary to extra auxiliary equipment and the experience to maintenance worker have it is certain will
Ask.Simultaneously as the unit of wind power plant is largely dispersed under several square kilometres of field MODEL OVER COMPLEX TOPOGRAPHY, only manually patrol
Inspection, the quality that not only operating difficulties but also influence are detected.
These years, with the development of measure theory and detection device, grown up a variety of online blade injury prisons
Survey method.In Practical Project, unit is because some problems are shut down for a long time, under the effect such as environment, deadweight, it is also possible to which generation is split
Line, therefore in unit before restart, it is necessary to carry out blade injury detection, i.e. active self-inspection.And current mainstream technology
Passive monitoring technology is belonged to, monitoring necessarily requires unit to be in running status, analyzed by monitoring unit vibration parameters,
It can not carry out actively checking oneself before unit starting.Meanwhile, some technologies are using electric current or the technology such as infrared, and equipment is expensive, letter
Number sensitivity easily produces erroneous judgement." 201510228326.4 (a kind of wind-powered electricity generation fan blade Crack Damage is supervised online for example, application number
Survey device and monitoring method) " belong to passive monitoring method, only when blade is in vibrational state (i.e. wind energy conversion system allows),
Monitoring signals can be obtained；Meanwhile, this method can only judge whether wind-powered electricity generation fan blade generates crackle, and can not judge
The position that crackle is produced.Application number " 201410243931.4 (a kind of long-range monitoring wind electricity blade interlayer structure loss method) " because
To employ Intelligent carbon fiber layer pipe perforator, one side cost is higher；On the other hand, measurement is resistivity on blade, work
Understood in journey, various factors (including weather environment changes) can have influence on resistivity, therefore this method is easily by signal
Interference.Application number " 201510750341.5 (a kind of monitoring of pneumatic equipment bladess on-site damage and recognition methods) " needs extra monitoring
Wind speed, and then the strain of comparison structure weakness and the relation of wind load judge whether blade damages, therefore fall within passively
Monitoring, it is desirable to which unit is in open state.
The content of the invention
In order to overcome the shortcoming of above-mentioned prior art, the purpose of this utility model is to provide a kind of pneumatic equipment bladess damage
Active self-checking unit, has the advantages that antinoise signal interference performance is strong, analysis precision is high, no matter in unit operation and stopped status,
Can be according to the health status for instructing automatic decision turbines vane.
In order to achieve the above object, the technical solution adopted in the utility model is：
A kind of pneumatic equipment bladess damage active self-checking unit, including：Multiple swept frequency excitation piezoelectric ceramic pieces 11, are arranged on wind
Power machine blade interior, each swept frequency excitation piezoelectric ceramic piece 11 after A/D modular converters 111 through signal cable 112 by connecting
Connect, signal cable 112 can provide enough input voltages needed for excitation, signal cable 112 is incorporated into wind from root of blade
Power wheel hub；Multiple signal measurement piezoelectric ceramic pieces 12, are arranged on inside pneumatic equipment bladess, quantity and swept frequency excitation piezoelectric ceramics
The correspondence of piece 11, is used in pairs close to swept frequency excitation piezoelectric ceramic piece 11, and with voltage amplification module 121, A/D modular converters 122
Connected with wireless transmitter module 123, wherein wireless transmission mode can also be replaced with signal cable；Wire/wireless signal is received
Transmitter module 13, in wind turbine hub, is connected or receives the letter of the output of wireless transmitter module 123 with signal cable 112
Number；Data processing module 14, receives transmitter module 13 with wire/wireless signal and is connected, and be connected to cabin by signal cable
The incoming monitoring of data/address bus central control system/computer 15 on.
The swept frequency excitation piezoelectric ceramic piece 11 based on modified lead zirconate titanate (PZT) piezoelectric ceramics material by being constituted, piezoelectric ceramics material
Material upper and lower surface is partially covered by the electrodes, and is planted in embedment electric insulation mechanical substrate；According to the frequency band range pre-set, output is sinusoidal
Frequency sweep pressure signal, sine sweep pressure signal is linearly increased with equidistant frequency, it is desirable at least 0.1Hz resolution ratio, is swept
Frequency action time is given according to setting.
The signal measurement piezoelectric ceramic piece 12 based on modified lead zirconate titanate (PZT) piezoelectric ceramics material by being constituted, piezoelectric ceramics material
Material upper and lower surface is partially covered by the electrodes, and is planted in embedment electric insulation mechanical substrate；By monitoring the vibration of blade, generating positive and negative voltage is exported
Signal.
Alternatively, the quantity of swept frequency excitation piezoelectric ceramic piece 11 is arranged according to monitoring needs, signal measurement piezoelectric ceramics
The quantity of piece 12 is corresponding with swept frequency excitation pressure ceramic piece 11.
The position of the swept frequency excitation piezoelectric ceramic piece 11 and signal measurement piezoelectric ceramic piece 12 is by blade resonance mode point
Analysis is determined, is typically disposed in vibration sensing region or blade rapid wear error area, must not be placed in before blade on the nodel line of quadravalence principal mode.
Alternatively, if signal measurement piezoelectric ceramic piece 12 uses signal cable connection mode, wire/wireless signal connects
Receive transmitter module 13 and only possess wired function.
The utility model is compared with existing technology, with substantive features as is evident below and significantly a little：
1) excitation disturbance is produced by swept frequency excitation piezoelectric ceramic piece so that pneumatic equipment bladess are under stopped status, signal
Measurement piezoelectric ceramic piece can also receive the vibration that blade is produced under swept frequency excitation, and blade is analyzed by data processing module
Health status, realizes wind turbine blade under any circumstance, regardless of whether operation, can complete blade injury nobody from
Inspection process, and result is fed back into central control system.
2) by the vibration signal of the blade of receiving, intrinsic frequency is extracted, intrinsic frequency is extremely stable, hardly wind-engaging
The factors such as load, environment influence, therefore its antinoise signal interference performance of self-checking unit is stronger, and precision is high.
Brief description of the drawings
Fig. 1 is the frame construction drawing that the utility model pneumatic equipment bladess damage active self-checking unit.
Fig. 2 is the input of the swept frequency excitation piezoelectric ceramic piece of the utility model pneumatic equipment bladess damage active self-checking unit
Voltage signal.
Fig. 3 is the position view that the utility model pneumatic equipment bladess damage active self-checking unit is arranged on blade.
Embodiment
To describe technology contents of the present utility model, construction feature in detail, being achieved the goal and effect, below in conjunction with the accompanying drawings
The utility model is described further with embodiment.
The frame construction drawing of active self-checking unit is damaged for the utility model pneumatic equipment bladess as shown in Figure 1.The wind-force
Machine blade injury active self-checking unit, including：Swept frequency excitation piezoelectric ceramic piece 11, it is contemplated that wind energy conversion system running environment is more disliked
It is bad, be generally located on inside pneumatic equipment bladess, and by after A/D modular converters 111 through signal cable 112；Signal cable 112 can
To connect to provide the enough voltage needed for excitation, signal cable 112 is incorporated into wind turbine hub from root of blade；Signal is surveyed
Piezoelectric ceramic piece 12 is measured, is arranged on inside pneumatic equipment bladess, quantity is corresponding with swept frequency excitation piezoelectric ceramic piece 11, is swashed close to frequency sweep
Encourage piezoelectric ceramic piece 11 to use in pairs, and connect with voltage amplification module 121, A/D modular converters 122 and wireless transmitter module 123
Connect, wherein wireless transmission mode can also be replaced with signal cable；Wire/wireless signal receives transmitter module 13, installed in wheel
In hub, the signal of the output of wireless transmitter module 123 is connected or received with signal cable 112；Data processing module 14, with it is wired/
Reception of wireless signals module 13 is connected, and the computer 15 of the incoming monitoring of the data/address bus for being connected to cabin by signal cable
On.
It is illustrated in figure 2 the swept frequency excitation piezoelectric ceramic piece 11 that the utility model pneumatic equipment bladess damage active self-checking unit
Input voltage signal.The voltage signal of the input is determined by master control system/computer 15, is sine sweep voltage signal,
According to the frequency band range pre-set, sine wave signal is linearly increased (it is required that at least 0.1Hz resolution with equidistant frequency
Rate), frequency sweep action time is given according to setting.
As shown in Fig. 3 the position that the utility model pneumatic equipment bladess damage active self-checking unit is arranged on blade shows
It is intended to.As specific embodiment, swept frequency excitation piezoelectric ceramic piece 11 and signal measurement piezoelectric ceramic piece 12 are arranged in pairs, altogether
4 pairs.Wherein, 2 pairs are arranged inside face of blade inside 2 pairs of arrangement, the back side.It is apparent that described swept frequency excitation piezoelectric ceramic piece
11 and installation number and the position of signal measurement piezoelectric ceramic piece 12, it is relevant according to pneumatic equipment bladess shapes and sizes.
In order to more intuitively illustrate that pneumatic equipment bladess of the present utility model damage the operation principle of active self-checking unit, now with
It is illustrated exemplified by embodiment.In a specific embodiment, the structure of the pneumatic equipment bladess, shape, and various
Quantity of sensor assembly etc. is only to enumerate, and is not construed as the limitation to technical solutions of the utility model.
In the present embodiment, by taking the MW level pneumatic equipment bladess of current main-stream as an example, blade injury is carried out using following steps
Actively or passively self-inspection：
Data scaling is carried out first：
1) the structured testing report of the full-scale blade provided by manufacturer or finite element modal are calculated and engineering warp
Test, inside face of blade and inside vacuum side of blade, respectively arrange 2 pairs of swept frequency excitation piezoelectric ceramic pieces 11 and signal measurement piezoelectricity
Potsherd 12.
2) it is blade on-hook is static, according to 5 rank intrinsic frequency data (f before manufacturer's offer or blade construction testi,i
=1~5), master control system/computer 15 set given frequency sweep frequency bandwidth (Δ fi=0.8fi~1.2fi, i=1~
5), step frequency interval (0.2Hz/s).Then instruction is received transmitting mould by data processing module 14, wire/wireless signal
Block 13, signal cable 112 and A/D modular converters 111, pass to swept frequency excitation piezoelectric ceramic piece 11, and whole blade is produced and swashed
Encourage.
3) signal measurement piezoelectric ceramic piece 12 collects the vibration information of blade, is changed by voltage amplification module 121, A/D
Module 122, signal cable 123, wire/wireless signal receive transmitter module 13, pass to data processing module 14, pass through filter
Ripple, intrinsic frequency identification, rejecting impeller turn the interfering frequencies such as frequency, have obtained 5 rank intrinsic frequency data before blade.
4) if swept bandwidth, frequency interval and frequency sweep set of time are unreasonable, cause data incomplete, it is impossible to before calculating
5 rank intrinsic frequencies.Related setting is adjusted, step 2 is re-executed) and step 3), until obtaining complete data.
5) wind energy conversion system startup optimization, closes swept frequency excitation piezoelectric ceramic piece 11.
6) step 3 is performed).
7) combining step 3) and step 6) blade before 5 rank intrinsic frequency data, and with manufacturer provide data comparison,
Relevant parameter is corrected, the natural frequency value under the conditions of the initial not damaged of blade has been obtained.The data storage is in data processing module
In 14, and feed back to master control system/computer 15, the reference of air feed electric field operation maintenance personnel.
The operating on-line monitoring of passive self-inspection, i.e. blade is described below：
8) wind energy conversion system is normally run, and closes swept frequency excitation piezoelectric ceramic piece 11.
9) step 3 is performed).
10) data processor 14 is if it find that measure obtained intrinsic frequency data with the calibration value (f in step 2i) production
Raw error has been more than the threshold value (being usually arranged as ± 5%) of setting, and changes with time, increasingly significant, then preliminary to judge
Blade generates damage.
If 11) except preceding 5 rank intrinsic frequency fiOutside, data processor 14 generates other obvious intrinsic frequencies
The rate and natural frequency value is highly stable unrelated with operating condition, generally may determine that blade generates important damage.
If 12) to step 11) suspection is held, can select to shut down execution step 2) and step 3), if the frequency is still
In the presence of then judging that blade generates damage.
The on-line monitoring under active self-inspection, i.e. blade stopped status is described below：
13) step 2 is performed)
14) step 3 is performed)
15) step 10 is performed)
If 16) data processor 14 generates extra obvious intrinsic frequency, it may determine that blade is produced
Damage.
By the implementation of above step, realize the online of pneumatic equipment bladess damage and actively and passively monitor, the device is not
Again dependent on environment and the requirement of blade operational shock, Static Leaf and dynamic damage self-inspection are realized.Improve measurement essence
Degree, with wider adaptability.
In the case where not departing from spirit or scope of the present utility model, can to the utility model carry out it is various modification and
Modification.Thus, if any modification or modification are fallen into the protection domain of appended claims and equivalent, it is believed that this reality
Cover these modifications and variations with new.
Claims (6)
1. a kind of pneumatic equipment bladess damage active self-checking unit, it is characterised in that including：Multiple swept frequency excitation piezoelectric ceramic pieces
(11), it is arranged on inside pneumatic equipment bladess, each swept frequency excitation piezoelectric ceramic piece (11) passes through A/D modular converters (111)
Connected by signal cable (112), signal cable (112) can provide enough input voltages needed for excitation, signal cable
(112) it introduces wind turbine hub from root of blade；Multiple signal measurement piezoelectric ceramic pieces (12), are arranged in pneumatic equipment bladess
Portion, quantity is corresponding with swept frequency excitation piezoelectric ceramic piece (11), uses in pairs close to swept frequency excitation piezoelectric ceramic piece (11), and with electricity
Amplification module (121), A/D modular converters (122) and wireless transmitter module (123) connection are pressed, wherein wireless transmission mode also can
Enough signal cables are replaced；Wire/wireless signal receives transmitter module (13), in wind turbine hub, with signal cable
(112) connect or receive the signal of wireless transmitter module (123) output；Data processing module (14), connects with wire/wireless signal
Receive transmitter module (13) connection, and the central control system/calculating for the incoming monitoring of data/address bus that cabin is connected to by signal cable
On machine (15).
2. a kind of pneumatic equipment bladess damage active self-checking unit according to claim 1, it is characterised in that the frequency sweep swashs
Piezoelectric ceramic piece (11) is encouraged by being constituted based on modified lead zirconate titanate (PZT) piezoelectric ceramics material, piezoceramic material upper and lower surface is by electrode
Covering, plants in embedment electric insulation mechanical substrate.
3. a kind of pneumatic equipment bladess damage active self-checking unit according to claim 1, it is characterised in that the signal is surveyed
Piezoelectric ceramic piece (12) is measured by being constituted based on modified lead zirconate titanate (PZT) piezoelectric ceramics material, piezoceramic material upper and lower surface is by electrode
Covering, plants in embedment electric insulation mechanical substrate.
4. a kind of pneumatic equipment bladess damage active self-checking unit according to claim 1, it is characterised in that the frequency sweep swashs
Encourage piezoelectric ceramic piece (11) quantity to be arranged according to monitoring needs, signal measurement piezoelectric ceramic piece (12) quantity and swept frequency excitation
Pressure ceramic piece (11) correspondence.
5. a kind of pneumatic equipment bladess damage active self-checking unit according to claim 1, it is characterised in that the frequency sweep swashs
The position for encouraging piezoelectric ceramic piece (11) and signal measurement piezoelectric ceramic piece (12) is determined by blade resonance model analysis, is placed in vibration
Sensitizing range or blade rapid wear error area, must not be placed in before blade on the nodel line of quadravalence principal mode.
6. a kind of pneumatic equipment bladess damage active self-checking unit according to claim 1, it is characterised in that if signal is surveyed
Measure piezoelectric ceramic piece (12) and use signal cable connection mode, then wire/wireless signal reception transmitter module (13) only possesses and had
Line function.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621478209.XU CN206369617U (en) | 2016-12-30 | 2016-12-30 | A kind of pneumatic equipment bladess damage active self-checking unit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201621478209.XU CN206369617U (en) | 2016-12-30 | 2016-12-30 | A kind of pneumatic equipment bladess damage active self-checking unit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106706241A (en) * | 2016-12-30 | 2017-05-24 | 中国华能集团清洁能源技术研究院有限公司 | Initiative self-checking device and method for wind turbine blade damage |
| CN107462605A (en) * | 2017-08-08 | 2017-12-12 | 华东理工大学 | A kind of transportable pressure vessel damages long-range real-time perception and early warning system |
| CN107886511A (en) * | 2017-11-28 | 2018-04-06 | 中国空气动力研究与发展中心计算空气动力研究所 | A kind of pneumatic equipment bladess surface damage detection method |
-
2016
- 2016-12-30 CN CN201621478209.XU patent/CN206369617U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106706241A (en) * | 2016-12-30 | 2017-05-24 | 中国华能集团清洁能源技术研究院有限公司 | Initiative self-checking device and method for wind turbine blade damage |
| CN106706241B (en) * | 2016-12-30 | 2023-06-02 | 中国华能集团清洁能源技术研究院有限公司 | Active self-checking device and method for damage of wind turbine blade |
| CN107462605A (en) * | 2017-08-08 | 2017-12-12 | 华东理工大学 | A kind of transportable pressure vessel damages long-range real-time perception and early warning system |
| CN107886511A (en) * | 2017-11-28 | 2018-04-06 | 中国空气动力研究与发展中心计算空气动力研究所 | A kind of pneumatic equipment bladess surface damage detection method |
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