CN2591607Y - High-speed rod-rolling mill gear box fault detecting plate - Google Patents
High-speed rod-rolling mill gear box fault detecting plate Download PDFInfo
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- CN2591607Y CN2591607Y CN 02294631 CN02294631U CN2591607Y CN 2591607 Y CN2591607 Y CN 2591607Y CN 02294631 CN02294631 CN 02294631 CN 02294631 U CN02294631 U CN 02294631U CN 2591607 Y CN2591607 Y CN 2591607Y
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- 238000005096 rolling process Methods 0.000 title claims abstract description 17
- 238000005070 sampling Methods 0.000 claims abstract description 5
- 238000001914 filtration Methods 0.000 claims description 17
- 238000000926 separation method Methods 0.000 claims description 14
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims description 6
- 239000003990 capacitor Substances 0.000 claims description 3
- 239000013078 crystal Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 238000001514 detection method Methods 0.000 abstract description 6
- 230000009897 systematic effect Effects 0.000 abstract 1
- 230000001133 acceleration Effects 0.000 description 7
- 230000003595 spectral effect Effects 0.000 description 5
- 238000003745 diagnosis Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 239000000284 extract Substances 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 238000010183 spectrum analysis Methods 0.000 description 2
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000009527 percussion Methods 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000013024 troubleshooting Methods 0.000 description 1
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Abstract
The utility model relates to a fault detecting plate of a high-speed rod-rolling mill gear box. A sensor which can sense related vibration signals is matched to the input end of a signal processor. Isolated systematic vibration signals are amplified by the signal processor, and then are respectively sent into a demodulating converter connected with the signal processor and a low frequency vibration separator. The demodulating converter is used for converting alternate current vibration signals into demodulating signals for reflecting fault impact information, while the low frequency vibration separator is used for separating low frequency vibration signals of 0 to 500Hz corresponding to rotating speed. Signals output by the demodulating converter and the low frequency vibration separator are sent to an interface of a sampling and analyzing diagnostic computer AD. The fault detecting plate of a high-speed rod-rolling mill gear box can solve the problem that the low-frequency vibration signals and the fault impact vibration signals output to the high-speed wire rod-rolling mill gear box are processed and collected, and detection signals are provided for the analysis of computer vibration and demodulating faults.
Description
Technical field
The utility model relates to a kind of high-speed rod-rolling mill gearbox fault pick-up unit.Particularly relate to a kind of to the low-frequency vibration of high-speed rod-rolling mill gear case, fault impact restituted signal pick-up unit.
Background technology
Because high-speed rod-rolling mill circumstance complication, machinery, electrical Interference is serious, make by many useless interference that superposeed on the detected signal of acceleration transducer, as not with these interference filterings, will certainly influence spectrum analysis, because the frequency of these undesired signals is vibration signal frequency height normally, adopt the method for low-pass filtering usually.But after the employing low-pass filtering, the impact signal of some reaction failure messages has also been filtered, the frequency of these impact signals is often much higher than the frequency of normal vibration signal and undesired signal, the main frequency segmentation of these signals can be represented: wherein 0-500HZ is the normal vibration frequency, 500-10K HZ is an interfering frequency, and 10K-50K is the impact signal frequency.
What fault diagnosis needed is the information of 0-500HZ and these two sections frequency ranges of 10K-50K, and wherein the information of 0-500HZ frequency range can be used as General Troubleshooting, and the information of 10K-50K frequency range then is used to do accurate diagnosis.
The detection of vibration signal is to utilize the acceleration transducer that is connected in the testee surface to carry out, acceleration transducer is a kind of force transducer in fact, acceleration transducer is the pick-up unit that the impulsive force that will afford is converted to charge signal, it should be noted that, detect the vibration of machinery with acceleration transducer, the signal of sensor has comprised two-part information, a part is normal mechanical vibration information, because normal plant equipment can produce vibration equally in motion process, also can produce vibration force, this can make acceleration transducer produce electric charge output, but this vibration force is a kind of simple harmonic motion of similar sine often, and the frequency of its vibration is directly proportional with the movement velocity of machinery; Another part is when plant equipment breaks down (as the crackle of bearing, gear, local shedding etc.), owing to exist impulsive force between the mechanical part, this impact-response is to acceleration transducer, make the output of sensor produce a kind of impact signal, because the time compole of this impulsive force is short, sensor is exported a kind of pulse signal, it is the burst pulse of a kind of pulse width less than 1 μ s, as shown in Figure 1, this burst pulse has periodically equally, and available period impulse function P (t) describes.As this periodic impulse function P (t) is expanded into the Fourier series, the then amplitude of each time sinusoidal component that is Fourier coefficient C
N, can be written as:
Demodulation is a special kind of skill that the basis from vibration measurement technique grows up, its main target be detect, the microshock when the diagnosis plant equipment breaks down in vibration information, just extract the information of 10K-50K frequency range.
From top analysis, know, carry out fault diagnosis by spectrum analysis, to on spectrogram, see the spectral line of reaction impact information, must guarantee that on time domain this impact information can collect by the high-speed a/d card, and in fact, the cycle impact signal of this pulsewidth less than 1 μ s, it is very difficult with the A/D card full detail all being collected.
In order to obtain the full detail of cycle impact signal, must nurse one's health signal.
By the Fourier series analysis as can be known, periodic pulsating wave has comprised unlimited frequency spectrum, the some of them frequency spectrum must be comprised by the resonance frequency band of sensor self, the dynamic magnifier of sensor approximately is 30bd, therefore, just can obtain the spectral line that some are exaggerated at HFS, spectral line outside the spectral line ratio sensor resonance band that these are exaggerated is approximately high 30 times, these spectral lines are reacted on the time domain, just become free damped vibration, and promptly impact energy fades away.
Summary of the invention
High-speed rod-rolling mill gearbox fault check-out console described in the utility model can solve the low-frequency vibration signal to high-speed rod-rolling mill gear case output, the problem that fault impact shock signal is handled and gathered, for computer vibration and demodulation fault analysis provide detection signal.
High-speed rod-rolling mill gearbox fault check-out console described in the utility model, can be felt relevant vibration signal by one, comprise that can be felt fault at least impacts the vibration signal that causes, low-frequency vibration signal is coupled to the input end of a signal processor at interior sensor, this signal processor is sent into respectively in connected demodulation transducer and the low-frequency vibration separation vessel after with isolated system vibration signal processing and amplifying, the demodulation transducer then from exchange vibration signal conversion have the restituted signal that reflects the fault impact information, the low-frequency vibration separation vessel is then isolated the 0-500HZ low-frequency vibration signal corresponding with rotating speed; Described demodulation transducer is by resonance frequency F0=30-50KHZ, and the electrical resonator of frequency band 10KHZ, wave detector and demodulator filter are equal to composition; The signal of described demodulation transducer and the output of low-frequency vibration separation vessel is sent into the computer A interface of a sampling and analyzing and diagnosing.
Aforesaid high-speed rod-rolling mill gearbox fault check-out console, but wherein the low-frequency vibration separation vessel contains measurement counter, phaselocked loop and switching capacity filter, and the control input end of counter connects computing machine DO mouth, and controlled by it; So that the filtering controlled frequency Fclr to phaselocked loop output makes the N=1-16 frequency division, obtain from the frequency F1 of its another output terminal output, and send the input end of phaselocked loop back to, input end of phaselocked loop receives from crystal oscillator and frequency divider reference frequency F0, this phaselocked loop guarantees F1=F0 automatically, therefore, guarantee Fclr=N * F0, the computer controlled automatic frequency N, make K that Fclr equals required frequency filtering doubly, output to switching capacity filter from phaselocked loop, switching capacity filter is under Fclr control, automatically carry out equaling by frequency the low-pass filtering of Fclr/K: the input end of switching capacity filter is connected to the output terminal of the interchange vibration signal amplifier of signal Processing, and the low frequency signal of switching capacity filter output is received the AD interface of computing machine.
Aforesaid high-speed rod-rolling mill gearbox fault check-out console, as the measurement under the relative fixed speed conditions time, the low-frequency vibration separation vessel can be made up of switching capacity filter MAX293, and its 1 pin connects a corresponding capacitor C to ground, can obtain needed filtering gauge tap.
The following good effect of the utility model tool:
1. high frequency, low frequency signal are carried out pre-service, low frequency signal medium-high frequency undesired signal is eliminated, and improves the signal to noise ratio (S/N ratio) of signal, can debug gain, satisfies 0-5V sampled voltage interval.
2. the feeble signal of bearing fault high-frequency percussion can be extracted, fault is analyzed for computing machine.
Description of drawings
Fig. 1 is a plant equipment when breaking down, the pulse signal synoptic diagram of sensor output;
Fig. 2 is the embodiment circuit theory diagrams of high-speed rod-rolling mill gearbox fault check-out console described in the utility model;
Fig. 3 is the low-frequency vibration splitter circuit schematic diagram of the be controlled by computing machine of high-speed rod-rolling mill gearbox fault check-out console described in the utility model.
Embodiment
The utility model is connect the 0.4mA constant current source vibration signal of being supplied by ICP formula sensor by signal processor, deliver to demodulation conversion and low-frequency vibration separation vessel respectively through the isolated interchange vibration signal of signal processor, described demodulation transducer then from exchange vibration signal conversion have the restituted signal that reflects the fault impact information, the low-frequency vibration separation vessel is then isolated the low-frequency vibration signal corresponding with rotating speed.The various signals of treated all output to the computer A interface for external sampling and analyzing and diagnosing.
Described low-frequency vibration signal separation vessel be frequency band 1.2-1.5 doubly to the low-pass filter of speed-frequency fn, leaching and the corresponding vibration signal of rotor speed-frequency send the analysis of external computer A sampling interface.
The detected body substantially invariable to rotating speed or variation is very little, because fn basic fixed, at this moment, corresponding above-mentioned tach signal extracts the low-pass filter of circuit, and the frequency filtering of the low-pass filter of low-frequency vibration signal splitter circuit can be the corresponding cutoff frequency of fixing; Be to adapt to the detection requirement that changes significantly of the rotor range of speeds, corresponding low-pass filter should be by frequency by computer program-control, wave filter just has corresponding controlled circuit to accept the control of computing machine parallel control mouth Do.
The visible Fig. 2 of the low-pass filter of low-frequency vibration separation vessel, but measurement counter (CD4516 presettable counter), phaselocked loop (CD4046) and switching capacity filter (MAX293) contained.The control input end of counter connects the D4-D7 control port of computing machine Do mouth, obtains frequency F1 with its 7 pin output so that the filtering controlled frequency Fclr of phaselocked loop 4 pin output is made the N=1-16 frequency division, sends 3 pin of phaselocked loop back to; 14 pin of phaselocked loop are accepted the reference frequency F0 from the frequency divider of crystal oscillator, this phaselocked loop guarantees F1=F0 automatically, therefore guarantees Fclr=N * F0, computer controlled automatic N, make K that Fclr equals required frequency filtering doubly, output to 1 pin of switching capacity filter R from phaselocked loop 4 pin; Switching capacity filter carries out equaling by frequency the low-pass filtering of Fclr/K automatically under Fclr control.The interchange vibration signal that input end 8 pin of switching capacity filter are received signal processor puts down the output terminal of device, and the low-frequency vibration signal of its output pin 5 outputs is received the AD interface of computer PC.
As the measurement under the relative fixed speed conditions time, can fixing by frequency is corresponding of low-pass filter, then corresponding being reduced to of circuit structure can be removed counter and phaselocked loop, 1 pin in switching capacity filter (MAX293) connects a corresponding capacitor C to ground, can obtain required filtering controlled frequency.
Circuit theory diagrams U1 is an amplifier, and wherein 1,2 pin connect the PCB sensor, and the switch of 11,12,13,16 pin can be adjusted enlargement factor, difference correspondence * 10, * 100, * 1000, any adjustment of 0-10.The output of U1 is the signal identical with input.U3 is a power supply, and it act as the sensor power supply.U5 is an active filter amplifier, produces the cutoff frequency of 100HZ.U6 is the amplifier of active filter, forms the high-pass equipment of 10KHZ.U7 is a wave filter, produces the cutoff frequency of 100HZ.U8 is an active filter amplifier, forms the high-pass equipment of 50KHZ.U9 is the level detection amplifier, the low frequency of detection signal.U10 is an active filter amplifier, uses as voltage follower.U11 is a wave filter, forms the high-pass equipment of 10KHZ.U12 is an active filter amplifier, forms the high-pass equipment of 100KHZ.
Disturb in order effectively to prevent to detect, the resonance frequency of demodulation transducer should be higher than all conventional vibration frequencies and humorous by frequency on the machine.For slow-speed of revolution machine, what the resonance frequency of demodulation transducer was got speed-frequency fn will be higher than inferior ultrasonic frequency at least; And at a high speed vane machine, the resonance frequency of demodulation transducer then can be taken as speed-frequency fn to multiply by number of blade Y and multiply by more than 10 ones again, and the Q value of transducer is got 5-10.
This circuit send A/D to stick into the line data collection except that the low frequency signal that demodulation process can be obtained with through the vibration signal that anti-aliasing filtering is handled, also the amplitude of the low signal that can directly demodulation be obtained shows with the form of the excellent figure of light emitting diode, can be that the user gets information about the impact size that is caused by fault.
Claims (3)
1. high-speed rod trailer gearbox fault check-out console, it is characterized in that: can be felt relevant vibration signal by one, comprise that can be felt fault at least impacts the vibration signal that causes, low-frequency vibration signal is coupled to the input end of a signal processor at interior sensor, this signal processor is sent into respectively in connected demodulation transducer and the low-frequency vibration separation vessel after with isolated system vibration signal processing and amplifying, the demodulation transducer then from exchange vibration signal conversion have the restituted signal that reflects the fault impact information, the low-frequency vibration separation vessel is then isolated the 0-500HZ low-frequency vibration signal corresponding with rotating speed; Described demodulation transducer is by resonance frequency F0=30-50KHZ, and the electrical resonator of frequency band 10KHZ, wave detector and demodulator filter are equal to composition; The signal of described demodulation transducer and the output of low-frequency vibration separation vessel is sent into the computer A interface of a sampling and analyzing and diagnosing.
2. a kind of high-speed rod-rolling mill gearbox fault check-out console as claimed in claim 1, it is characterized in that: but the low-frequency vibration separation vessel contains measurement counter, phaselocked loop and switching capacity filter, the control input end of counter connects computing machine DO mouth, and controlled by it; So that the filtering controlled frequency Fclr to phaselocked loop output makes the N=1-16 frequency division, obtain from the frequency F1 of its another output terminal output, and send the input end of phaselocked loop back to, input end of phaselocked loop receives from crystal oscillator and frequency divider reference frequency F0, this phaselocked loop guarantees F1=F0 automatically, therefore, guarantee Fclr=N * F0, the computer controlled automatic frequency N, make K that Fclr equals required frequency filtering doubly, output to switching capacity filter from phaselocked loop, switching capacity filter carries out equaling by frequency the low-pass filtering of Fclr/K automatically under Fclr control; The input end of switching capacity filter is connected to the output terminal of the interchange vibration signal amplifier of signal Processing, and the low frequency signal of switching capacity filter output is received the AD interface of computing machine.
3. a kind of high-speed rod-rolling mill gearbox fault check-out console as claimed in claim 1, it is characterized in that: during as the measurement under the relative fixed speed conditions, the low-frequency vibration separation vessel can be made up of switching capacity filter MAX293, its 1 pin connects a corresponding capacitor C to ground, can obtain needed filtering gauge tap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02294631 CN2591607Y (en) | 2002-12-27 | 2002-12-27 | High-speed rod-rolling mill gear box fault detecting plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02294631 CN2591607Y (en) | 2002-12-27 | 2002-12-27 | High-speed rod-rolling mill gear box fault detecting plate |
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| CN2591607Y true CN2591607Y (en) | 2003-12-10 |
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| CN 02294631 Expired - Fee Related CN2591607Y (en) | 2002-12-27 | 2002-12-27 | High-speed rod-rolling mill gear box fault detecting plate |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100371692C (en) * | 2003-12-22 | 2008-02-27 | 欧洲直升机公司 | Device for indicating the vibration level of an apparatus |
| CN102107222B (en) * | 2009-12-24 | 2012-08-29 | 上海梅山钢铁股份有限公司 | On-line vibration detection device and method for equipment state of hot finishing mill |
| CN103376291A (en) * | 2012-04-18 | 2013-10-30 | 松下电器产业株式会社 | Abnormality detection method and abnormality detection device |
| CN103712796A (en) * | 2013-12-13 | 2014-04-09 | 中国航空工业集团公司北京航空精密机械研究所 | Bearing fatigue signal detection system |
| CN109297663A (en) * | 2018-10-10 | 2019-02-01 | 河南理工大学 | Accurate rolling vibration test platform |
-
2002
- 2002-12-27 CN CN 02294631 patent/CN2591607Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100371692C (en) * | 2003-12-22 | 2008-02-27 | 欧洲直升机公司 | Device for indicating the vibration level of an apparatus |
| CN102107222B (en) * | 2009-12-24 | 2012-08-29 | 上海梅山钢铁股份有限公司 | On-line vibration detection device and method for equipment state of hot finishing mill |
| CN103376291A (en) * | 2012-04-18 | 2013-10-30 | 松下电器产业株式会社 | Abnormality detection method and abnormality detection device |
| CN103712796A (en) * | 2013-12-13 | 2014-04-09 | 中国航空工业集团公司北京航空精密机械研究所 | Bearing fatigue signal detection system |
| CN109297663A (en) * | 2018-10-10 | 2019-02-01 | 河南理工大学 | Accurate rolling vibration test platform |
| CN109297663B (en) * | 2018-10-10 | 2024-02-09 | 河南理工大学 | Precision rolling vibration test platform |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: BEIJING POLYTECHNIC UNIV. Free format text: FORMER OWNER: GAO LIXIN Effective date: 20040924 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20040924 Address after: 100022 No. 100 Chaoyang District Ping Tian Park, Beijing Patentee after: Beijing University of Technology Address before: 100022 No. 100 Chaoyang District Ping Tian Park, Beijing Patentee before: Gao Lixin |
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| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |