CN104266841A - Fault diagnosis device and diagnosis method of diesel engine - Google Patents
Fault diagnosis device and diagnosis method of diesel engine Download PDFInfo
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- CN104266841A CN104266841A CN201410536492.6A CN201410536492A CN104266841A CN 104266841 A CN104266841 A CN 104266841A CN 201410536492 A CN201410536492 A CN 201410536492A CN 104266841 A CN104266841 A CN 104266841A
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Abstract
The invention discloses a fault diagnosis device of a diesel engine. The fault diagnosis device comprises a storage unit, a detection unit and a matching unit. The storage unit is used for storing feature values of feature parameters obtained when different faults occur to the diesel engine, and the feature parameters comprise at least one of the vibrating acceleration speed, the vibrating speed, the vibrating displacement, the vibrating frequency and the rotating speed of the diesel engine. The detection unit is used for detecting the feature parameters in the work process of the diesel engine. The matching unit is used for matching the feature parameters detected by the detection unit and the feature values stored by the storage unit to obtain the matching ratio, and if the matching rate is higher than a preset value, the diesel engine breaks down. The invention further provides a fault diagnosis method of the diesel engine. Automatic fault diagnosis can be achieved.
Description
Technical field
The present invention relates to Diesel Fault Diagnosis field, in particular to a kind of trouble-shooter of diesel engine and a kind of method for diagnosing faults of diesel engine.
Background technology
Diesel engine is one of current most widely used power-equipment, be widely used in the fields such as petroleum drilling, dynamic power, rail traction, engineering machinery, various boats and ships and Automobile drive, the quality of its running status, is directly connected to the work efficiency of whole application facility.Therefore condition monitoring and fault diagnosis is carried out to diesel engine, especially real-time fault diagnosis and predicting in advance, ensure that system is normal, safe operation, make it to be in optimal operating condition, significant to the repair quality and efficiency improving equipment.
Diesel Fault Diagnosis is in collecting device operational process, or the status information under relative static conditions, by carrying out treatment and analysis to measured signal, and the history working condition of bonding apparatus, judge and identify the real time execution state of the art of plant equipment and parts thereof, predicted anomaly fault, thus a kind of technology determining necessary preventive measure.
The method that diesel engine failure diagnosis is conventional comprises tachometry, vibration analysis method and oil analysis method three major types.Wherein tachometry is that sensor installation measures diesel engine speed on diesel engine link; Vibration analysis is the vibration time-domain signal change by applying vibrating mass in various dynamic tester collection, record and analysis diesel engine; Oil analyzing technology is then by carrying out frequency spectrum detection to the composition of lubricating oil, finds the early stage mild wear fault to mill part.But these technology for detection means are relatively single, also not to the function that vibration noise processes, and sense cycle is long, is unfavorable for finding in real time and shifting to an earlier date failure judgement.
The relatively general construction industry of working environment of petroleum drilling diesel engine, has plant equipment complex structure, parts is various, and the feature such as environmental impact is more outstanding.On-the-spot at petroleum drilling operation, petroleum drilling workman remains by means of personal experience, is judged the running status of diesel engine by sense of touch and the sense of hearing, brings hidden danger significantly to plant maintenance and job safety.
Summary of the invention
Technical matters to be solved by this invention is, provides a kind of trouble-shooter that can realize the diesel engine of automatic trouble diagnosis.Technical matters to be solved by this invention is, provides a kind of method for diagnosing faults that can realize the diesel engine of automatic trouble diagnosis.
Therefore, technical scheme of the present invention is as follows:
A trouble-shooter for diesel engine, comprising:
Storage element, the eigenwert of characteristic parameter during for storing diesel engine generation different faults, described characteristic parameter comprises at least one in the vibration acceleration of diesel engine, vibration velocity, vibration displacement, vibration frequency and rotating speed;
Detecting unit, for detecting described characteristic parameter in working process of diesel engine;
Matching unit, the described eigenwert that characteristic parameter and described storage element for being detected by described detecting unit store carries out mating obtaining matching rate, if matching rate is higher than preset value, judges that diesel engine breaks down.
In this technical scheme, make full use of the various characteristic informations of diesel engine, and in conjunction with petroleum drilling site environment situation, have complementary advantages with existing diesel universal diagnostic technology, realize the real-time diagnosis of petroleum drilling diesel engine fault; Each stack features value in database can carry out adjustment and perfect according in implementation of the present invention according to on-site actual situations; In conjunction with the on-the-spot actual environment of petroleum drilling, the characteristic feature signal making full use of petroleum drilling diesel engine carries out Real-Time Monitoring and diagnosis to the working condition of diesel engine, compensate for previous experiences judge subsidy, to the plant maintenance of diesel engine and the safety work of drilling engineering significant.
Further: described storage element is also for storing the neighbourhood noise eigenwert of diesel engine under working environment; The trouble-shooter of described diesel engine also comprises noise reduction unit, be connected to described detecting unit and described matching unit, for carrying out noise reduction process in conjunction with described neighbourhood noise eigenwert corresponding under diesel engine current operating environment to the signal of detection of characteristic parameters value described in the representative received from described detecting unit and the signal after noise reduction is sent to described matching unit.
In this technical scheme, the eigenwert of parameters is through the signal after denoising, therefore, when the different diesel engines identical to model carry out malfunction monitoring respectively, the characteristic fault signal data of each equipment can be carried out resource sharing, thus accelerate a whole set of diesel-engine equipment fault diagnosis system matches criteria database enrich degree.
The trouble-shooter of described diesel engine also comprises display device, is connected to described matching unit, for showing described matching rate, can show in real time matching rate, facilitates staff immediately to grasp the working order of diesel engine.
The trouble-shooter of described diesel engine also comprises alarm unit, is connected to described matching unit, for giving the alarm when judging that described diesel engine breaks down at described matching unit, even if thus can be processed when ensureing that diesel engine breaks down.Wherein, the mode given the alarm can be sound also can be given the alarm by the signal lamp of different colours, can represent according to the pilot lamp of different matching degrees with different colours.
Present invention also offers a kind of method for diagnosing faults of diesel engine, comprising:
Steps A, stores the eigenwert of characteristic parameter during diesel engine generation different faults, and described characteristic parameter comprises at least one in the vibration acceleration of diesel engine, vibration velocity, vibration displacement, vibration frequency and rotating speed;
Step B, detects described characteristic parameter in working process of diesel engine;
Step C, carries out mating obtaining matching rate with the described eigenwert of storage by the characteristic parameter detected, if matching rate is higher than preset value, judges that diesel engine breaks down.
In this technical scheme, make full use of the various characteristic informations of diesel engine, and in conjunction with petroleum drilling site environment situation, have complementary advantages with existing diesel universal diagnostic technology, realize the real-time diagnosis of petroleum drilling diesel engine fault; Each stack features value in database can carry out adjustment and perfect according in implementation of the present invention according to on-site actual situations; In conjunction with the on-the-spot actual environment of petroleum drilling, the characteristic feature signal making full use of petroleum drilling diesel engine carries out Real-Time Monitoring and diagnosis to the working condition of diesel engine, compensate for previous experiences judge subsidy, to the plant maintenance of diesel engine and the safety work of drilling engineering significant.
Further: also to comprise in step, store the neighbourhood noise eigenwert of diesel engine under working environment; Also comprised before described step C, in conjunction with described neighbourhood noise eigenwert corresponding under diesel engine current operating environment, noise reduction process is carried out to the signal representing the described detection of characteristic parameters value detected in described step B.
In this technical scheme, the eigenwert of parameters is through the signal after denoising, therefore, when the different diesel engines identical to model carry out malfunction monitoring respectively, the characteristic fault signal data of each equipment can be carried out resource sharing, thus accelerate a whole set of diesel-engine equipment fault diagnosis system matches criteria database enrich degree.
Further, the method for diagnosing faults of described diesel engine also comprises by described matching rate display on the display apparatus, can show in real time, facilitate staff immediately to grasp the working order of diesel engine to matching rate.
Further, the method for diagnosing faults of described diesel engine is also included in when judging that described diesel engine breaks down and gives the alarm, even if thus can be processed when ensureing that diesel engine breaks down.Wherein, the mode given the alarm can be sound also can be given the alarm by the signal lamp of different colours, can represent according to the pilot lamp of different matching degrees with different colours.
Accompanying drawing explanation
Fig. 1 is the block diagram of the trouble-shooter of diesel engine according to the embodiment of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.It should be noted that, when not conflicting, the feature in the embodiment of the application and embodiment can combine mutually.
As shown in Figure 1, the trouble-shooter of diesel engine according to an embodiment of the invention, comprising:
Storage element, the eigenwert of characteristic parameter during for storing diesel engine generation different faults, described characteristic parameter comprises at least one in the vibration acceleration of diesel engine, vibration velocity, vibration displacement, vibration frequency and rotating speed;
Detecting unit, for detecting described characteristic parameter in working process of diesel engine;
Matching unit, the described eigenwert that characteristic parameter and described storage element for being detected by described detecting unit store carries out mating obtaining matching rate, if matching rate is higher than preset value, judges that diesel engine breaks down.
Wherein, the acquisition principle of fault eigenvalue is as follows: under certain working environment, monitors in real time to the vibration of diesel engine and tach signal, and by the data temporary storage after process in database (storage element); When diesel engine really breaks down in operational process, each signal of vibration when occurring from extracting fault in the middle of disposal system and/or rotating speed, it can be used as the matches criteria eigenwert of certain specific fault to be stored in the middle of storage element.
In this technical scheme, make full use of the various characteristic informations of diesel engine, and in conjunction with petroleum drilling site environment situation, have complementary advantages with existing diesel universal diagnostic technology, realize the real-time diagnosis of petroleum drilling diesel engine fault; Each stack features value in database can carry out adjustment and perfect according in implementation of the present invention according to on-site actual situations; In conjunction with the on-the-spot actual environment of petroleum drilling, the characteristic feature signal making full use of petroleum drilling diesel engine carries out Real-Time Monitoring and diagnosis to the working condition of diesel engine, compensate for previous experiences judge subsidy, to the plant maintenance of diesel engine and the safety work of drilling engineering significant.
Further: described storage element is also for storing the neighbourhood noise eigenwert of diesel engine under working environment; The trouble-shooter of described diesel engine also comprises noise reduction unit, be connected to described detecting unit and described matching unit, for carrying out noise reduction process in conjunction with described neighbourhood noise eigenwert corresponding under diesel engine current operating environment to the signal of detection of characteristic parameters value described in the representative received from described detecting unit and the signal after noise reduction is sent to described matching unit.
Wherein, characteristic signal data are after whole detection system Installation and Debugging, are obtained by detection experiment in advance.The method of testing of neighbourhood noise is, when tested diesel engine is in closed condition, detects the vibration signal that vibration transducer obtains, and is converted to the characteristic signal of one group of neighbourhood noise; Because the model of tested diesel engine is different with present position, under applied environment, the environment of other equipment also there are differences, therefore need to carry out ambient noise signal collection respectively for different well sites environment and diesel engine model, and be stored in the middle of database with the form of specific code name after treatment.
In this technical scheme, the eigenwert of parameters is through the signal after denoising, therefore, when the different diesel engines identical to model carry out malfunction monitoring respectively, the characteristic fault signal data of each equipment can be carried out resource sharing, thus accelerate a whole set of diesel-engine equipment fault diagnosis system matches criteria database enrich degree.
The trouble-shooter of described diesel engine also comprises display device, is connected to described matching unit, for showing described matching rate, can show in real time matching rate, facilitates staff immediately to grasp the working order of diesel engine.
The trouble-shooter of described diesel engine also comprises alarm unit, is connected to described matching unit, for giving the alarm when judging that described diesel engine breaks down at described matching unit, even if thus can be processed when ensureing that diesel engine breaks down.Wherein, the mode given the alarm can be sound also can be given the alarm by the signal lamp of different colours, can represent according to the pilot lamp of different matching degrees with different colours.
Alarm unit described above is used for starting to adopt pilot lamp or alert ring tone prompting fault after matching rate exceedes a certain threshold value, and the threshold value of matching rate people can be set to 60% or other numerical value for carrying out.Such as, because the present invention has monitored four groups of signals simultaneously, can establish and provide yellow indicator lamp prompting when the matching degree of wherein three groups of signals is more than or equal to 60%, if the matching rate of four groups of signals is all more than or equal to 60% provide red led prompting, and the tinkle of bells that can give the alarm, point out corresponding post responsible official close this diesel engine as early as possible and carry out the maintenance of privileged site, otherwise provide green indicating lamp, indication equipment operational excellence.
Present invention also offers a kind of method for diagnosing faults of diesel engine, comprising:
Steps A, stores the eigenwert of characteristic parameter during diesel engine generation different faults, and described characteristic parameter comprises at least one in the vibration acceleration of diesel engine, vibration velocity, vibration displacement, vibration frequency and rotating speed;
Step B, detects described characteristic parameter in working process of diesel engine;
Step C, carries out mating obtaining matching rate with the described eigenwert of storage by the characteristic parameter detected, if matching rate is higher than preset value, judges that diesel engine breaks down.
Wherein, the acquisition principle of fault eigenvalue is as follows: under certain working environment, monitors in real time to the vibration of diesel engine and tach signal, and by the data temporary storage after process in database; When diesel engine really breaks down in operational process, each signal of vibration when occurring from extracting fault in the middle of disposal system and/or rotating speed, it can be used as the matches criteria eigenwert of certain specific fault to be stored in the middle of database.
In this technical scheme, make full use of the various characteristic informations of diesel engine, and in conjunction with petroleum drilling site environment situation, have complementary advantages with existing diesel universal diagnostic technology, realize the real-time diagnosis of petroleum drilling diesel engine fault; Each stack features value in database can carry out adjustment and perfect according in implementation of the present invention according to on-site actual situations; In conjunction with the on-the-spot actual environment of petroleum drilling, the characteristic feature signal making full use of petroleum drilling diesel engine carries out Real-Time Monitoring and diagnosis to the working condition of diesel engine, compensate for previous experiences judge subsidy, to the plant maintenance of diesel engine and the safety work of drilling engineering significant.
Further: also to comprise in step, store the neighbourhood noise eigenwert of diesel engine under working environment; Also comprised before described step C, in conjunction with described neighbourhood noise eigenwert corresponding under diesel engine current operating environment, noise reduction process is carried out to the signal representing the described detection of characteristic parameters value detected in described step B.
Wherein, characteristic signal data are after whole detection system Installation and Debugging, are obtained by detection experiment in advance.The method of testing of neighbourhood noise is, when tested diesel engine is in closed condition, detects the vibration signal that vibration transducer obtains, and is converted to the characteristic signal of one group of neighbourhood noise; Because the model of tested diesel engine is different with present position, under applied environment, the environment of other equipment also there are differences, therefore need to carry out ambient noise signal collection respectively for different well sites environment and diesel engine model, and be stored in the middle of database with the form of specific code name after treatment.
In this technical scheme, the eigenwert of parameters is through the signal after denoising, therefore, when the different diesel engines identical to model carry out malfunction monitoring respectively, the characteristic fault signal data of each equipment can be carried out resource sharing, thus accelerate a whole set of diesel-engine equipment fault diagnosis system matches criteria database enrich degree.
Further, the method for diagnosing faults of described diesel engine also comprises by described matching rate display on the display apparatus, can show in real time, facilitate staff immediately to grasp the working order of diesel engine to matching rate.
Further, the method for diagnosing faults of described diesel engine is also included in when judging that described diesel engine breaks down and gives the alarm, even if thus can be processed when ensureing that diesel engine breaks down.Wherein, the mode given the alarm can be sound also can be given the alarm by the signal lamp of different colours, can represent according to the pilot lamp of different matching degrees with different colours.
Start to adopt pilot lamp or alert ring tone prompting fault after matching rate exceedes a certain threshold value, the threshold value of matching rate people can be set to 60% or other numerical value for carrying out.Such as, because the present invention has monitored four groups of signals simultaneously, can establish and provide yellow indicator lamp prompting when the matching degree of wherein three groups of signals is more than or equal to 60%, if the matching rate of four groups of signals is all more than or equal to 60% provide red led prompting, and the tinkle of bells that can give the alarm, point out corresponding post responsible official close this diesel engine as early as possible and carry out the maintenance of privileged site, otherwise provide green indicating lamp, indication equipment operational excellence.
In sum, content of the present invention is not limited in the above-described embodiment, and those skilled in the art can propose other embodiment within technological guidance's thought of the present invention, but this embodiment all comprises within the scope of the present invention.
Claims (8)
1. a trouble-shooter for diesel engine, is characterized in that, comprising:
Storage element, the eigenwert of characteristic parameter during for storing diesel engine generation different faults, described characteristic parameter comprises at least one in the vibration acceleration of diesel engine, vibration velocity, vibration displacement, vibration frequency and rotating speed;
Detecting unit, for detecting described characteristic parameter in working process of diesel engine;
Matching unit, the described eigenwert that characteristic parameter and described storage element for being detected by described detecting unit store carries out mating obtaining matching rate, if matching rate is higher than preset value, then judges that diesel engine breaks down.
2. the trouble-shooter of diesel engine according to claim 1, is characterized in that:
Described storage element is also for storing the neighbourhood noise eigenwert of diesel engine under working environment;
The trouble-shooter of described diesel engine also comprises noise reduction unit, be connected to described detecting unit and described matching unit, for carrying out noise reduction process in conjunction with described neighbourhood noise eigenwert corresponding under diesel engine current operating environment to the signal of detection of characteristic parameters value described in the representative received from described detecting unit and the signal after noise reduction is sent to described matching unit.
3. the trouble-shooter of diesel engine according to claim 1 and 2, is characterized in that, also comprises:
Display device, it is connected to described matching unit, for showing described matching rate.
4. the trouble-shooter of diesel engine according to claim 1 and 2, is characterized in that, also comprises:
Alarm unit, it is connected to described matching unit, for giving the alarm when described matching unit judges that described diesel engine breaks down.
5. a method for diagnosing faults for diesel engine, is characterized in that, comprising:
Steps A, stores the eigenwert of characteristic parameter during diesel engine generation different faults, and described characteristic parameter comprises at least one in the vibration acceleration of diesel engine, vibration velocity, vibration displacement, vibration frequency and rotating speed;
Step B, detects described characteristic parameter in working process of diesel engine;
Step C, carries out mating obtaining matching rate with the described eigenwert of storage by the characteristic parameter detected, if matching rate is higher than preset value, judges that diesel engine breaks down.
6. the method for diagnosing faults of diesel engine according to claim 5, is characterized in that:
Also comprise in step, store the neighbourhood noise eigenwert of diesel engine under working environment;
Also comprised before described step C, in conjunction with described neighbourhood noise eigenwert corresponding under diesel engine current operating environment, noise reduction process is carried out to the signal representing the described detection of characteristic parameters value detected in described step B.
7. the method for diagnosing faults of the diesel engine according to claim 5 or 6, is characterized in that, also comprises: by described matching rate display on the display apparatus.
8. the method for diagnosing faults of the diesel engine according to claim 5 or 6, is characterized in that, also comprises: give the alarm when judging that described diesel engine breaks down.
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| CN201410536492.6A CN104266841A (en) | 2014-10-11 | 2014-10-11 | Fault diagnosis device and diagnosis method of diesel engine |
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Cited By (9)
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| CN105486514A (en) * | 2015-12-01 | 2016-04-13 | 中国船舶工业系统工程研究院 | Marine diesel engine admission valve excessive clearance fault diagnosis method and device |
| CN106829076A (en) * | 2017-02-08 | 2017-06-13 | 河南中烟工业有限责任公司 | A kind of packaging facilities mechanical Fault Monitoring of HV method and apparatus chosen based on measuring point |
| CN106995077A (en) * | 2017-02-08 | 2017-08-01 | 河南中烟工业有限责任公司 | A kind of packaging facilities mechanical breakdown self-diagnosing method and device |
| CN107063654A (en) * | 2016-01-18 | 2017-08-18 | 株式会社神户制钢所 | Rotating machinery abnormal detector and this method and rotating machinery |
| CN107132063A (en) * | 2017-04-12 | 2017-09-05 | 柳州易农科技有限公司 | A kind of agricultural machinery fault finding system |
| CN107328582A (en) * | 2017-08-25 | 2017-11-07 | 中国人民解放军镇江船艇学院 | Diesel engine fault detection means |
| CN110044631A (en) * | 2019-03-13 | 2019-07-23 | 中交广州航道局有限公司 | Trend prediction method, device and the computer equipment of ship machine diesel engine |
| CN110470480A (en) * | 2019-06-25 | 2019-11-19 | 南京伟业燃油喷射技术有限公司 | The intelligent automatic diagnostic system of diesel engine fault and diagnostic method based on big data |
| CN112051503A (en) * | 2020-04-14 | 2020-12-08 | 中鹏机电有限公司 | Multi-path commercial power monitoring device for diesel generating set |
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