CN206592249U - A kind of blower fan main shaft break detection system - Google Patents
A kind of blower fan main shaft break detection system Download PDFInfo
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- CN206592249U CN206592249U CN201720160968.XU CN201720160968U CN206592249U CN 206592249 U CN206592249 U CN 206592249U CN 201720160968 U CN201720160968 U CN 201720160968U CN 206592249 U CN206592249 U CN 206592249U
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- Control Of Positive-Displacement Air Blowers (AREA)
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Abstract
The utility model provides a kind of blower fan main shaft break detection system, including signal modulation composite traces instrument, data transmission link, prior-warning device and at least three groups sensors, every group of sensor includes two sensors for being used to be symmetricly set on the concentric circles of blower fan main shaft pivot, each sensor is used to gather vibration signal during fan operation, each sensor is connected with the data transmission link, the data transmission link is used to be connected with the signal modulation composite traces instrument by center slip ring, the signal modulation composite traces instrument is connected with prior-warning device, the signal modulation composite traces instrument is used to be arranged in fan engine room switch board, the utility model improves the degree of accuracy that detection is broken to blower fan main shaft, reduce the complexity detected to fan trouble.
Description
Technical field
The utility model belongs to information gathering and processing technology field, more particularly to a kind of blower fan main shaft fracture detection system
System.
Background technology
Because domestic wind power industry is started late, the manufacturing technology of wind power generating set is also immature, wind-power electricity generation
In the operation phase accident that wind power generating set falls head often constantly occurs for unit, this is by wheel hub and main shaft connecting screw rod
The blower fan pendant head accident caused, or the blower fan pendant head accident that main shaft fracture is caused are broken, and these fractures are generally fatigue fracture, are broken
Vibration is split often since a certain part in main shaft surface, without in center, to disaster generating process since nascent crackle
In, can occur multiple vibratory impulse, therefore, it is necessary to which the fracture caused to main shaft fracture, connecting screw rod fracture etc. is vibrated
Detected and early warning.
At present, the big data epoch are belonged to, information explosion, information redundance are big, and cost of processing information is high, conventional monitoring axle
The sensor and remote monitoring system of vibration are held, it is difficult to find or analysis detects these signals, so that when being delayed optimal remedy
Machine, causes further secondary disaster to cause the heavy losses that tower is collapsed.
Publication No. CN101393049A Chinese patent document, discloses a kind of vibration of wind generating set monitoring and event
Hinder the method for diagnosis, this method gathers fan vibration signal by sensor, completing signal by data acquisition equipment stores, and leads to
Cross component bus module and characteristic value data is sent to receiving module, and be stored in data center, threshold value is set in data center
Curve, characteristic value data sustainable growth, during more than threshold value, receiving module carries out early warning.
But this method is that all fan vibration signals of collection are analyzed and processed, not by the original of blower fan
Vibration signal and vibration and shock signal are separated, and this will certainly be handled useless redundancy, not only dealt with
It is more complicated, and there is the problem of detecting inaccurate, cause early warning system false alarm.
Utility model content
The purpose of this utility model is to provide a kind of blower fan main shaft break detection system, for solving prior art wind
Power generator main shaft failure detection redundancy is big, processing not in time, it is inaccurate the problem of.
To achieve the above object, the technical solution of the utility model is：
A kind of blower fan main shaft break detection system, including signal modulation composite traces instrument, data transmission link, prior-warning device
At least three groups sensors, every group of sensor includes be used to be symmetricly set on the concentric circles of blower fan main shaft pivot two
Sensor, each sensor is used to gather vibration signal during fan operation, and each sensor connects with the data transmission link
Connect, the data transmission link is used to be connected with the signal modulation composite traces instrument by center slip ring, the signal modulation
Composite traces instrument is connected with prior-warning device, and the signal modulation composite traces instrument is used to be arranged in fan engine room switch board.
Further, each group sensor is uniformly arranged on the concentric circles of the pivot of blower fan main shaft.
Further, each sensor need to ensure at least one sensing of the root of each fan blade when setting
Device.
The beneficial effects of the utility model are：
The blower fan main shaft break detection system that the utility model is provided, is revolved by the way that vibrating sensor is uniformly arranged on into blower fan
On the concentric circles for turning the surface centre of gyration, and it is symmetric, is conducive to the detection of fracture orientation；Using the system by collection
Vibration signal during fan operation obtains composite signal after negating and advanced or delay component is handled so that normal signal
Level of the amplitude control 0, when the amplitude of composite signal is more than the amplitude thresholds more than setting, carries out early warning and/or by wind
Machine is shut down, and is improved the degree of accuracy that type component fracture detection is rotated to blower fan main shaft etc., is reduced what fan trouble was detected
Complexity.
Brief description of the drawings
Fig. 1 is the schematic diagram that vibrating sensor symmetric array of the present utility model is laid out；
Fig. 2 is profile of the blower fan main shaft along A group sensors；
The schematic diagram of each processing links of vibration signal when Fig. 3 is fan operation；
Fig. 4 is the structured flowchart of the fault detection system of wind power generating set of the present utility model.
Embodiment
Embodiment of the present utility model is further described below in conjunction with the accompanying drawings：
According to the yin-yang eight diagram array of Zhang Heng's Seismoscope, and the vibration sequential according to eight legs detection Eight-Diagram tactics nets of spider
With orientation principle, because the position of blower fan pendant head rupture is at the non-central position of main shaft, and Zhang Heng's Seismoscope can be detected effectively
The seismology on periphery, so as to according to its array layout.In the case of without vibrating, because of the negative and positive of its seismograph
Eight Diagrams do not have the output of (earthquake) information on Central Symmetry, and in poised state, so as to efficiently reduce information content and information
Processing cost.
Blower fan main shaft break detection system of the present utility model, including signal modulation composite traces instrument, data transmission link,
Prior-warning device and at least three groups sensors, every group of sensor include the concentric circles for being used to be symmetricly set on blower fan main shaft pivot
On two sensors (similar on the centrosymmetric two legs of spider), vibration when each sensor is used to gather fan operation
Signal, each sensor is connected with data transmission link, and data transmission link is used to close with the signal modulation by center slip ring
Into recorder connection, signal modulation composite traces instrument is connected with prior-warning device, and signal modulation composite traces instrument is arranged on blower fan machine
In the switch board of cabin.
In order to improve detection performance, according to the yin-yang eight diagram array of Zhang Heng's Seismoscope, each group sensor is uniformly arranged on
On the concentric circles of the pivot of blower fan main shaft, and each sensor need to ensure the root of each fan blade at least when setting
One sensor.
Prior-warning device in the present embodiment is the PLC and SCADA system of blower fan, the spindle end due to detection position to rotate
Face, different from static surfaces such as the gear-boxes in usual SCADA system, it is necessary to be believed using rotary transfer circuit the vibration of pickup
Number carry out special transmission design.In the blower fan main shaft end face being connected with wheel hub, as shown in figure 1, the rotation on blower fan main shaft
3 groups are evenly arranged on centrosymmetric concentric circles, 3 groups of vibrating sensors constitute symmetrical pick-up array, 1 is the vibration of A groups
Sensor, 2 be B groups vibrating sensor, 3 be C group vibrating sensors, 4 be fan blade, wherein at least one vibrating sensor
Near the root of a certain fan blade, and the present embodiment then has 3 using 3 conventional blade horizontal axis wind-driven generator groups
Individual sensor 3 blades root position, as shown in Fig. 2 for along the profile of A group sensors, wherein, 5 be detection blower fan
The sensor that main shaft is broken with wheel hub connecting screw rod, 6 be blower fan main shaft and wheel hub connecting screw rod, and 7 be blower fan main shaft, and 8 be blower fan
Center slip ring.
The detection process of blower fan main shaft break detection system of the present utility model is：
The 1st, three groups of sensors are set, and every group of sensor includes two be symmetrically distributed on blower fan main shaft pivot concentric circles
Individual sensor, vibration signal during every group of sensor collection fan operation, the output signal of usual vibrating sensor for voltage or
Current signal, wherein, size of current is 4-20mA.
Signal when the 2nd, to the fan operation of any one sensor collection in every group of sensor carries out negating processing, and right
The signal during fan operation of any one sensor collection in every group of sensor carries out advanced or delayed processing, makes two in every group
The fan operation signal of individual sensor collection staggers in time, and the signal of every group of sensor through above-mentioned processing is modulated
Synthesis, obtains composite signal.
By taking one of which sensors A 1 and A2 as an example, 1-1 and 1-2 difference representative sensor A1 and sensor in such as Fig. 2
A2, data transmission link is transmitted a signal in fan engine room switch board by the alignment of shafts and center slip ring system；Signal is adjusted
The continuous signal that the signal that composite traces instrument processed can carry out data transfer carries out time domain is modulated synthesis, signal modulation synthesis
Recorder is arranged in fan engine room switch board, as shown in Figure 2 and Figure 4.
The modulation building-up process refers to be carried out negating processing first by the signal of sensors A 1 or A2 collections, obtains signal A1 '
Or A2 ', it is not processed for the useful fracture impact signal of guarantee, the blower fan of any one sensor collection of every group of sensor is transported
Signal during row carries out the processing of advanced or delayed timeliness link, it is to avoid useful signal, which is liquidated, to be buried in oblivion, and obtains signal
Secondary-confirmation, so as to ensure that useful signal is highlighted, and during every group of sensor collection fan operation between the time of vibration signal
Every the time threshold less than setting, such as advanced to signal A2 ' progress or delay component obtains signal A2 ", remakes phase and amplitude
Adjustment, i.e., by the A1 ' signals and A2 " of sensor, signal is added, and obtains composite signal, as shown in Figure 3.To in composite signal
Amplitude sets threshold value, and the amplitude of wherein normal signal is almost 0, or less than setting amplitude threshold values, so as to eliminate in normal operation
Vibration signal, that is, eliminate normal signal, therefore abatement carried out to most of signal in composite signal and reject；Then synthesize
Amplitude is more than the signal for setting amplitude thresholds as vibration and shock signal in signal, carries out early warning and/or by fan parking, now will
The data of setting time before early warning, such as only preserve the data of 10 minutes before early warning, at the data of preservation
The reason for main shaft is broken occurs for reason, analysis, and the data less than setting amplitude thresholds are entered the information for only retaining 10 minute datas
Row circulation refreshes, so as to effectively reduce information content and cost of processing information.Because there is the vibratory impulse letter of fracture pendant head in blower fan
Number by advanced or delayed, and stagger in sequential, it is impossible to cut down, so as to obtain that the last one one be weak or weak the last one from sequential
Or the opposite signal of two amplitudes of equality strength, so as to indicate that orientation of the position on surface of fracture, and signal are amplified
The secondary-confirmation shown.
What monitoring collection was compared is the common signal after three groups or four groups of modulation, when one of which composite signal amplitude is unexpected
During increase, then 10 minutes record datas in two channels in this group of signal are subjected to preservation on the spot and uploaded, wherein amplitude
The position of that maximum sensor, just as the azimuth of vibration of copper ball whereabouts display in Zhang Heng's Seismoscope, it may be determined that hair
The abnormal position of raw fracture；Or it is combined into signal amplitude increase suddenly or almost while when occurring, separating this 2 groups when occurring two
The data of the setting time before the early warning in 4 channels in signal, such as only carried out the data of 10 minutes before early warning just
Ground is preserved and uploaded, and the maximum sensor of signal amplitude in every group of sensor is determined, by the position between two sensors of determination
Put and be defined as occurring the abnormal position of fracture.
3rd, the signal amplitude obtained after collection, transmission and comparison control from symmetrical sensor is more than the threshold values set
After 2 times, PLC and the SCADA system alarm of blower fan are triggered, and by fan parking, can after personnel's boarding confirms to belong to wrong report
The frequency that increase triggering is shut down is 3, and record of putting on record.
4th, the diagnosis at the position that may be occurred according to the main shaft obtained in above-mentioned steps, screw rod connection, master to the position
Axial stress concentration zones etc. are investigated, and polishing crackle is carried out at ultrasonic examination or radiographic inspection, main shaft cracks if necessary or is returned
Factory etc. is handled, and prevention blower fan falls the generation of head, reduces further personal security and property loss.
In the present embodiment, the modulation synthesis of signal during to fan operation can also be after A/D conversions, using special
After DSP processing, then signal during to fan operation is modulated synthesis.
The utility model compared with prior art, effectively can be made to wind driven generation set main shaft fracture or screw rod fracture
Into blower fan pendant head accident taken precautions against and monitored；Main shaft fracture or screw rod fracture are taken full advantage of often from pivot outside
Surface take place, vibrating sensor is uniformly arranged on the concentric circles of the surface of revolution centre of gyration, and negative and positive are symmetrical, are conducive to
The detection of fracture orientation；A vibrating sensor is at least placed on root of blade position, fan blade operation is taken full advantage of
In up and down loading imbalance the characteristics of, be conducive to the reliable collection to break signal；By in the time domain of symmetric signal misplace and
Liquidate abatement, the abatement for being conducive to normal signal and highlights fracture for 2 times and vibration signal and confirms again, is conducive to reliable triggering to alarm
System analysis in time and processing, and the measurement accuracy of vibrating sensor is improved, so as to reduce cost；Can be with PLC and SCADA
The convenient connection of warning system and processing in time.
In above-described embodiment, advanced or delayed processing can be only carried out to any one sensor in every group of sensor, or together
When advanced or delayed processing is carried out to A1 and A2, but advanced or delayed time existence time interval is to ensure that, between the time
The time needed for half-turn is rotated when wind wheel maximum (top) speed is less than.
Specific embodiment is presented above, but the utility model is not limited to embodiment described above.This
The basic ideas of utility model are above-mentioned basic scheme, for those of ordinary skill in the art, according to of the present utility model
Teaching, designs the models of various modifications, formula, parameter and need not spend creative work.The utility model is not being departed from
Principle and spirit in the case of to embodiment carry out change, modification, replacement and modification still fall within guarantor of the present utility model
In the range of shield.
Claims (3)
1. a kind of blower fan main shaft break detection system, it is characterised in that including signal modulation composite traces instrument, data line
Road, prior-warning device and at least three groups sensors, every group of sensor include being used to be symmetricly set on the same of blower fan main shaft pivot
Two sensors on heart circle, each sensor is used to gather vibration signal during fan operation, each sensor and the number
Connected according to transmission line, the data transmission link is used to be connected with the signal modulation composite traces instrument by center slip ring,
The signal modulation composite traces instrument is provided for being arranged in fan engine room switch board.
2. blower fan main shaft break detection system according to claim 1, it is characterised in that each group sensor is uniformly set
Put on the concentric circles of the pivot of blower fan main shaft.
3. blower fan main shaft break detection system according to claim 2, it is characterised in that each sensor is when setting
At least one sensor of the root of each fan blade need to be ensured.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720160968.XU CN206592249U (en) | 2017-02-22 | 2017-02-22 | A kind of blower fan main shaft break detection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720160968.XU CN206592249U (en) | 2017-02-22 | 2017-02-22 | A kind of blower fan main shaft break detection system |
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| Publication Number | Publication Date |
|---|---|
| CN206592249U true CN206592249U (en) | 2017-10-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720160968.XU Active CN206592249U (en) | 2017-02-22 | 2017-02-22 | A kind of blower fan main shaft break detection system |
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| Country | Link |
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| CN (1) | CN206592249U (en) |
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2017
- 2017-02-22 CN CN201720160968.XU patent/CN206592249U/en active Active
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