CN2814375Y - Engine bearing fault detecting instrument - Google Patents
Engine bearing fault detecting instrument Download PDFInfo
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- CN2814375Y CN2814375Y CN 200520089197 CN200520089197U CN2814375Y CN 2814375 Y CN2814375 Y CN 2814375Y CN 200520089197 CN200520089197 CN 200520089197 CN 200520089197 U CN200520089197 U CN 200520089197U CN 2814375 Y CN2814375 Y CN 2814375Y
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Abstract
The utility model relates to a fault detector for an engine bearing. The utility model is characterized in that the fault detector is composed of a vibration sensor, a vibration signal amplifier, a vector filter, a multiple-way switch, an A/D switching device, a frequency spectrum analyzing and microcomputer processing system, etc., wherein special computer software for detecting the faults of a bearing is arranged in the microcomputer; 11 operation interfaces are also arranged on a display of the microcomputer for being conveniently used by detecting persons. The detector of the utility model is effective in practical use, eliminates the influence of external environment and human factors and rapidly and accurately obtains test results. Because the utility model solves one technological problem disturbing the technical field for a long time, the utility model brings obvious economic benefits to companies.
Description
Technical field
The utility model belongs to the technical field that aeromotor is safeguarded and detected, and also relates to the technical field of the utility appliance of propulsion system on aircraft and the vehicle.Particularly relate to a kind of fault test diagnostic equipment that uses at the aeromotor bearing.
Background technology
Aeromotor must scheduled overhaul.Before engine overhaul dispatched from the factory, the sound that sends when each must listen carefully the bearing rotation by the operator was to judge whether bearing exists fault between its between centers bearing and rotor.Because human auditory's sensitivity and resolution are limited, and exist individual difference, the method for bearing fault is judged in this sense of hearing by the professional, and only according to professional's working experience, its artificial factor obviously is very big.Facts have proved,, or influence the safety of engine maintenance quality and aircraft flight even if veteran professional also exists the hearing error to each other, thereby is easy to cause misjudgment, or delays the repairing time of engine.
The utility model content
The purpose of this utility model is to seek a kind of science, reliably and as far as possible reduce the engine bearing failure testing diagnostic method of personal error, and on this basis, designs corresponding engine shaft bearing failure testing instrument.
The inventor is by the long-term observation to engine bearing operation, and the rumble spectrum when finding its rumble spectrum when engine bearing is normally moved and breaking down has tangible difference.The different times of same bearing comprises new installation period, uses mid-term and uses also difference to some extent of its rumble spectrums such as later stage.Process is to the above-mentioned rumble spectrum collection of bearing, contrast and analysis, and combination has accumulated a large amount of science data, thereby summed up the scientific law that concerns between bearing arrangement and its rumble spectrum the metallographic microanalysis of the structure and the defective of bearing.
On the basis of above-mentioned bearing fault testing and diagnosing method design, the utility model design and the engine shaft bearing failure testing instrument of making is characterized in that it is made up of vibration transducer, vibration signal amplifier, vector filter, multi-way switch and critical pieces such as A/D conversion equipment, spectrum analysis and microprocessor system.Vibration transducer can be displacement transducer or speed pickup, also can be acceleration transducer.
Adapt with device, the utility model also provides for the bearing fault detection and has used computer software, and its program mainly includes:
1, reads in the sensor measurement data.
2, compare with normal data (being the normality data), conform to and assert that then bearing state is normal, and directly import data-storage system; Do not conform to and then enter next program.
3, remeasure, read in the sensor measurement data.
4, carry out the second time relatively with the normality data.Conform to and then measure again and read in the sensor measurement data and the normality data compare for the third time, relatively conform to for the third time and can assert that then bearing state is normal and import data-storage system; More do not conform to for the second time and then enter next program.
5, the input expert system is judged bearing fault.
6, data storage.
7, print result finishes.
Engine shaft bearing failure testing instrument provided by the utility model, according to research to the engine bearing vibration performance, the bearing vibration signal is carried out spectrum analysis, the structure analysis and the detection of defective bearing vibration feature and defective combined, thereby whether intact, whether occur the trend of defective if accurately judging bearing.Can avoid the interference of extraneous factor in the testing process and reduce personal error, have scientific analysis, accuracy of judgement, series of advantages such as simple to operate, easy to use, the very significant good result of performance in the moving maintenance process of aeromotor.
Description of drawings
Fig. 1 is that the structure principle chart of fault locator of the present utility model is a structured flowchart;
Fig. 2 is a fault detect computer program instructions logic diagram of the present utility model;
Flow diagram when Fig. 3 is actual use the of the present utility model;
Fig. 4 and Fig. 5 are respectively as an embodiment of the present utility model---the circuit arrangement map and the circuit diagram of aeromotor bearing fault detector;
Fig. 6 is the test macro master surface chart of engine bearing (claiming equipment again) failure diagnostic apparatus;
Fig. 7 is a detector device management operations surface chart;
Fig. 8 is that the detector parameter is provided with surface chart;
Fig. 9 is a detector time-domain analysis surface chart;
Figure 10 is a detector frequency-domain analysis surface chart;
Figure 11 is a detector correlation analysis surface chart;
Figure 12 is a detector data readback surface chart;
Figure 13 is a detector trend analysis surface chart.
Embodiment
Set forth content of the present utility model further below in conjunction with Figure of description.The computer processing that comprises (1) engine shaft bearing failure testing instrument and (2) Engine Block Test and diagnosis usefulness.We use this detector the engine bearing fault to be carried out the actual mechanical process of testing and diagnosing structure and (2) of emphasis narration (1) engine shaft bearing failure testing instrument when narration embodiment of the present utility model.In fact, the narration by operating process also just has clearer understanding to bearing fault detector of the present utility model naturally.
The utility model is made up of the hardware and software two large divisions.Hardware system can be made up of parts such as embedded computer (industrial control computer), touch-screen, collection plate, sensors.Software systems are developed by Visual Basic language, carry out data management with Access, and spectrum analyzer system adopts the LabView language compilation, has powerful field data analysis function.The utility model design is innovative; Yet from general plotting, detector structurally makes up various existing advanced technologies and manufactures and designs out, so this part can be regarded as a kind of combination utility model.
Engine shaft bearing failure testing instrument system organically combines multinomial known advanced technology such as vibration survey, data acquisition and control, vibration frequency specturm analysis, database (comprising expert system) and external unit and parts and makes, and it possesses functions such as vibrating data collection, discriminatory analysis, trend analysis, data management.Below just respectively above-mentioned every technology is disclosed, emphasis is Data Acquisition and Conversion System (DACS) and vibration frequency specturm analysis system.
(1) Data Acquisition and Conversion System (DACS)
Data acquisition system (DAS) is made of portion's bodies such as sensor, charge amplifier, vector filters in regular turn and is connected with the vibration frequency specturm analysis system by A/D converter.
Sensor configuration has three kinds of displacement transducer, speed pickup and acceleration transducers, can select according to on-the-spot needs for the tester.When selecting to use acceleration transducer, do not add integration and be acceleration signal, an integration is a rate signal, quadratic integral is a displacement signal; As when selecting speed pickup, then integration once is displacement signal.
The 100Hz of analysis frequency scope is to 50KHz, and frequency spectrum spectral line number is 100～3200, and the corresponding sampling points number should be: sampling number=2.56 * spectral line number.
Amplifier is divided into automatic amplification and fixing amplifies two kinds of selections, wherein fixedly enlargement factor comprise ± 1, ± 2, ± 4, ± 16, ± 32, ± 64, ± 16 class such as 128 and ± 256.When the signal amplitude of being surveyed is stablized, should adopt automatically and amplify, when the measured signal amplitude was unstable, should adopting fixedly, multiple amplified.
(2) vibration frequency specturm analysis system
The vibration frequency specturm analysis system is made up of hardware and software two parts.
Hardware components comprises as shown in Figure 4: the embedded host system, can adopt and grind auspicious serial industry control and grind auspicious embedded host plate with motherboard such as CHA21172.Integrated low-power consumption AV1300MHzCPU, a 144PINSDRM slot are arranged on the plate, 128MSDRM internal memory (the maximum 128MSDRM of support internal memory) is installed.System on Chip/SoC adopts VT8606 serial system chip.BIOS adopts Award ACPI BIOS, SSD: integrated Compact Flash socket is supported the CF/SM card on the plate.LAN: adopt the Intel82559 network chip, support the 10/100M Ethernet.IO interface: provide a parallel port (LPT), two serial ports (RS-232), two USB mouths, a keyboard and mouse interface (KB/PS).Display system adopts the S3Savage display chip, supports regular display (CRT) and LCD (LCD) to show output.
Software section can be installed Windows98 operating system (it is comparatively convenient to use at present), also can select other operating system for use.Analysis software is divided into host computer and slave computer two parts.Slave computer is installed in the portable embedded detector, is mainly used in on-the-spot test and simple analysis; Host computer is installed in notebook computer or the desktop computer, is used for test data is carried out the analysis of extensive, observes and printout.
When bearing being carried out testing and diagnosing (as shown in Figure 3), can be undertaken by following step with engine shaft bearing failure testing instrument of the present utility model:
(1) starts instrument, selection measuring point.
Start instrument, display will demonstrate the main interface (see figure 6) of tester this moment.Main interface manifests four big functional modules: equipment control, data acquisition, trend analysis and data readback.The tester can click button on the forms switches between each functional block or logs off.
When carrying out fault diagnosis, may be to many engines, also may be to the one or more measuring points of engine (bearing), each measuring point has lot of data again to be needed to gather, analyze.Click the device management module on the main interface this moment, occurs device management operations interface (see figure 7) on the tester display.
By the operation interface requirement, input equipment (engine) information is as information such as engine title, numbering and bearing measuring point title, positions.Selected sensor, parameters such as setting sensor sensitivity, vibration signal classification are installed on the determination portion position of bearing.
Starting engine, the beginning test job.
(2) image data, comparative analysis.
Before image data, must confirm grab type and drainage pattern.After configuring parameter, click " beginning " key, manifest parameter on the display interface (see figure 8) is set.
Acquisition parameter is provided with the interface and has 11 functional modules, is respectively: sensor selection, analysis frequency, high pass setting, anti-aliasing filtering, port number, sampling number, integration setting, triggering source, measurement range selection (being that enlargement factor is selected), determine and cancellation function etc.
During image data, must guarantee that system time is correct.
When the data of being gathered were analyzed, detector was provided with the operation interface more than three: time-domain analysis (see figure 9), frequency-domain analysis (Figure 10), correlation analysis (Figure 11).Adopt the interface of multipage box form, can between three kinds of analyses, switch mutually easily.
The test data that input is gathered can show on each interface clearly with the comparative analysis of normal data, also can enter step (4) easily and print.
(3) data storage, replicate analysis.
The data of being gathered conform to the normal data waveform, then can assert the bearing non-fault; Do not conform to as waveform, must remeasure, compare once more with the normal data waveform by program by Fig. 2.
At this moment, need only repeat above-mentioned steps, determine that finally bearing state is whether normal and judge nature of trouble up to follow procedure.
(4) data readback, printout.
Data readback can be called the image data and the waveform of user storage, and data and wave shape playback are provided, and playback provides inquiry, analysis, printing function.
Its concrete interface of data readback as shown in figure 12.Data readback provides four kinds of inquiry modes: by device name, by device numbering, press the measuring point title, the inquiry full detail.Select querying condition, input inquiry content more earlier.Click " inquiry " button, the data that search just can be listed in information list.
As need test bearing is carried out trend analysis, utilize query function to search the data that to check earlier, again the input inquiry content.From above-mentioned table, select and want assay surface (seeing Figure 13), and can be automatically listing with the historical data of all measuring points that selected measuring point is identical in the tabulation.Select analysis condition then, comprise peak value, effective value, 1 frequency multiplication, 2 frequencys multiplication and 3 frequencys multiplication, click " beginning to analyze " button, demonstrate trend analysis figure.
When wanting the printout waveform, the waveform that needs affirmation in advance to print is please chosen data (selected data are highlighted demonstration) from tabulation, click " display waveform " button then, after treating below screen, to demonstrate corresponding waveform and being identified, click " printing " button printed waveform again.
(5) log off, close instrument
After detection finishes, can log off, close instrument.Can clear up the various sensors of being installed this moment, in order to using next time.
Engine shaft bearing failure testing instrument provided by the utility model is very effective in actual use.In between the tool car of our company's aeromotor, owing to used technology of the present utility model, external environment and artificial factor have been got rid of, draw testing result quickly and accurately, solved a technical barrier that is troubling our company's (comprising the present technique field) for a long time, obtained the beyond thought technique effect of people, thereby also brought tangible economic benefit to our company.
Claims (1)
1, a kind of engine shaft bearing failure testing instrument, it is characterized in that this device is made up of vibration transducer, vibration signal amplifier, vector filter, multi-way switch, A/D conversion equipment, vibration frequency specturm analysis and microprocessor system, vibration transducer, vibration signal amplifier, vector filter are connected with the vibration frequency specturm analysis system by A/D converter, and the vibration frequency specturm analysis system is made of embedded computer system and embedding vibration frequency specturm analysis program wherein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520089197 CN2814375Y (en) | 2005-02-02 | 2005-02-02 | Engine bearing fault detecting instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520089197 CN2814375Y (en) | 2005-02-02 | 2005-02-02 | Engine bearing fault detecting instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2814375Y true CN2814375Y (en) | 2006-09-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520089197 Expired - Fee Related CN2814375Y (en) | 2005-02-02 | 2005-02-02 | Engine bearing fault detecting instrument |
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| CN (1) | CN2814375Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100587416C (en) * | 2006-01-30 | 2010-02-03 | 日产自动车株式会社 | Abnormal noise correction verification apparatus and method |
| CN101726691A (en) * | 2008-11-03 | 2010-06-09 | 尤洛考普特公司 | Method of inspecting the integrity of an avionics system, and an inspection device for implementing said method |
| CN101819093A (en) * | 2010-03-31 | 2010-09-01 | 桂林电子科技大学 | Fault diagnosis device for spindle bearing of roadheader cutting head and use method thereof |
| CN103728134A (en) * | 2012-10-16 | 2014-04-16 | 华锐风电科技(集团)股份有限公司 | Method and device for detecting unit bearing and wind generator unit |
-
2005
- 2005-02-02 CN CN 200520089197 patent/CN2814375Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100587416C (en) * | 2006-01-30 | 2010-02-03 | 日产自动车株式会社 | Abnormal noise correction verification apparatus and method |
| CN101726691A (en) * | 2008-11-03 | 2010-06-09 | 尤洛考普特公司 | Method of inspecting the integrity of an avionics system, and an inspection device for implementing said method |
| CN101726691B (en) * | 2008-11-03 | 2013-10-16 | 尤洛考普特公司 | Method of inspecting the integrity of an avionics system, and an inspection device for implementing said method |
| CN101819093A (en) * | 2010-03-31 | 2010-09-01 | 桂林电子科技大学 | Fault diagnosis device for spindle bearing of roadheader cutting head and use method thereof |
| CN103728134A (en) * | 2012-10-16 | 2014-04-16 | 华锐风电科技(集团)股份有限公司 | Method and device for detecting unit bearing and wind generator unit |
| CN103728134B (en) * | 2012-10-16 | 2016-05-18 | 华锐风电科技(集团)股份有限公司 | The detection method of unit bearing and device and wind-powered electricity generation unit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060906 Termination date: 20130202 |