CN201583407U - Device for diagnosing cylinder of diesel engine - Google Patents
Device for diagnosing cylinder of diesel engine Download PDFInfo
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- CN201583407U CN201583407U CN2009202057333U CN200920205733U CN201583407U CN 201583407 U CN201583407 U CN 201583407U CN 2009202057333 U CN2009202057333 U CN 2009202057333U CN 200920205733 U CN200920205733 U CN 200920205733U CN 201583407 U CN201583407 U CN 201583407U
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Abstract
The utility model relates to a device for diagnosing a cylinder of a diesel engine, comprising a processing unit, a high-speed synchronous A/D converter, output equipment, a cylinder cover vibration sensor for detecting the vibration of the cylinder cover of the diesel engine, a cylinder jacket vibration sensor for detecting the vibration of the cylinder jacket, and an oil pressure sensor for detecting the pressure wave of an oil-supply high-pressure oil pipe, wherein the cylinder cover vibration sensor, the cylinder jacket vibration sensor and the oil pressure sensor are connected with the processing unit respectively by the high-speed synchronous A/D sensor; the cylinder cover vibration sensor is arranged on a platform on the top part of the cylinder cover; the cylinder jacket vibration sensor is arranged on the side wall of the cylinder jacket; and the oil pressure sensor is clamped on the high-pressure oil pipe. In the utility model, by recording and analyzing the vibration of the cylinder cover of the diesel engine, the vibration of the cylinder jacket and the pressure wave signal of the oil-supply high-pressure oil pipe, the cylinder state, the abrasion condition and the working state of the oil supply system can be diagnosed without decomposing the diesel engine, the guarantee rate of the equipment is improved greatly and the maintenance cost is reduced simultaneously.
Description
Technical field
The utility model relates to the detection technique field, particularly a kind of device of judging diesel engine gas cylinder working condition by detection Cylinder Vibration and charge oil pressure ripple.
Background technology
Diesel engine comprises four-cycle diesel and two kinds of forms of two-stroke diesel engine, and wherein four-cycle diesel is most widely used, and its course of work comprises air inlet, compression, burning work done, four courses of work of exhaust.Diesel engine is owing to powerful, oil consumption low (than gasoline engine oil consumption low 15%～30%), low, the high outstanding advantage of reliability of pollutant emission, in today that people's energy-conserving and environment-protective consciousness improves constantly, become a kind of power machine that is most widely used in the mankind nowadays society, be widely used in the every field of national economy, as automobile, tractor, engineering machinery, small farm power, industrial stationary power generation, railway locomotive, boats and ships, the ship of war, tank etc.
Owing to be subjected to the restriction of current techniques diagnostic level, the maintenance mode of China's diesel engine also mainly adopts periodic maintenance and emergency maintenance dual mode at present.No matter wherein promptly the diesel engine virtual condition is how in periodic maintenance, all by the certain time between overhauls(TBO) and the scope of repair that pre-establishes, diesel engine is carried out strip inspection, the size of attrition surfaces such as cylinder jacket of diesel engine, piston, piston ring, valve, valve seating, bent axle, camshaft is measured and the adjusted value of all parameters such as valve clearance of cylinder, port timing, injection advance angle remeasures adjustment; And the maintenance that emergency maintenance is promptly carried out when diesel engine breaks down.
Yet above-mentioned maintenance process only relies on maintenance personal's personal experience, with hand touch, eye is peeped, heard of etc., and traditional test mode is judged it, has obvious defects:
1, produced a large amount of surplus and repaired, caused unnecessary human and material resources waste, for example during periodic maintenance not the virtual condition of tube apparatus how all to carry out strip inspection, measurement to entire equipment, expended great amount of manpower and material resources and financial resources;
2, can not guarantee diesel engine reliability service in twice periodic maintenance interval time, periodic maintenance is based on parts wear theory and Probability Statistics Theory, be to set the maintenance intervals time by certain fiducial interval and acceptable economic cost, like this, the maintenance intervals time is little, maintenance cost is just high, and maintenance intervals is big, and the probability that twice maintenance intervals broke down in the time is just high.The maintenance intervals time is set howsoever, and the equipment that all can not guarantee is at twice maintenance intervals reliability service in the time;
3, repair quality is difficult to guarantee, at present under the maintenance mode, owing to lack necessary checkout equipment, the personal experience who only relies on the maintenance personal, with hand touch, eye traditional test mode such as peeps, hears of it is judged, wants stochastic factor such as examinate's personal mood and judgement inevitably, can not judge quickly and accurately trouble location-isolate-handle, cause omission, leak and repair, hide some dangers for for diesel engine operation from now on;
4, servicing time long, the maintenance cost height, the maintenance job of diesel engine at present mainly relies on maintenance personal's personal experience, high-caliber maintenance personal is difficult to cultivate, expense is very high.And owing to be difficult to find failure cause, the ubiquity mistake is repaiied, the phenomenon of miss change, and these all cause servicing time long, the maintenance cost height.
The utility model content
Technical problem to be solved in the utility model is, at the defective of above-mentioned existing diesel maintenance system and mode labor intensive material resources, difficult quality guarantee, provides a kind of device of duty of the diesel engine quick diagnosis cylinder of diesel engine that need not disintegrate.
The scheme that its technical matters that solves the utility model adopts is: a kind of cylinder of diesel engine diagnostic device is provided, comprise processing unit, the high-speed synchronous A/D converter, output device, be used to detect the cylinder head vibration transducer of the vibration of cylinder cover for diesel engine, be used to detect the cylinder jacket vibration transducer of the vibration of cylinder jacket, be used to detect the oil pressure sensor of the pressure wave of fuel feeding high-pressure oil pipe, described cylinder head vibration transducer, the cylinder jacket vibration transducer, oil pressure sensor is connected with processing unit through high-speed synchronous A/D sensor respectively, described cylinder head vibration transducer is installed on the cylinder head top platform, the cylinder jacket vibration transducer is installed on the cylinder jacket sidewall, and oil pressure sensor is clamped on the high-pressure oil pipe.
In cylinder of diesel engine diagnostic device described in the utility model, described cylinder head vibration transducer, cylinder jacket vibration transducer all adopt the magnetic base vibration transducer.
In cylinder of diesel engine diagnostic device described in the utility model, described oil pressure sensor adopts the external clamping type sensor and is clamped on the high-pressure oil pipe cylinder head inlet horizontal segment.
In cylinder of diesel engine diagnostic device described in the utility model, described processing unit comprise the host CPU that is used for data management and be used for data acquisition and processing (DAP) from CPU, describedly be connected to host CPU from CPU, described output device is connected to host CPU, and described high-speed synchronous A/D converter is connected to from CPU.
In cylinder of diesel engine diagnostic device described in the utility model, described output device is display device or print device.
In cylinder of diesel engine diagnostic device described in the utility model, described high-speed synchronous A/D converter adopts the synchronous A/D converter of multichannel.
In cylinder of diesel engine diagnostic device described in the utility model, described cylinder head vibration transducer, cylinder jacket vibration transducer and oil pressure sensor are connected to the high-speed synchronous A/D converter via signal conditioning circuit respectively.
In cylinder of diesel engine diagnostic device described in the utility model, also be provided with communication interface, described communication interface is connected to processing unit.
In cylinder of diesel engine diagnostic device described in the utility model, also comprise memory device, described memory device is connected to processing unit.
In cylinder of diesel engine diagnostic device described in the utility model, also comprise power supply unit, described power supply unit includes the power source conversion device.
Cylinder of diesel engine diagnostic device of the present utility model has following beneficial effect: adopt cylinder head vibration transducer, cylinder jacket vibration transducer and oil pressure sensor acquisition and recording signal and diagnose cylinder of diesel engine state, abrasion condition and oil supply system duty according to the signal of gathering.Compare with traditional method, device of the present utility model has tangible advantage:
1, can be used as " dynamic cardiograph " of diesel engine, the diesel engine that need not disintegrate just can carry out " health check-up " to diesel engine, judges whether diesel engine work is normal.
2, can search diesel engine fault fast, and fault be positioned guide maintenance work.
3, can realize on-line monitoring to visual plant such as railway locomotive, foreign-going ship, naval vessels and mega-construction project diesel engine mechanically, the potential faults that equipment is occurred gives warning in advance the support equipment safe operation.
4, utilize the communication function of described device, can set up diesel engine work status remote monitoring net, set up database and expert system, realize remote diagnosis, and guide maintenance job the various knotty problems of diesel engine.
5, provide technological means from present " periodic maintenance " system to the change of " state maintenance " system for the engine maintenance system, improve the coverage ratio of equipment greatly, reduce maintenance cost simultaneously.
6, the modern management level and the maintenance levels of Chinese large-sized motive power machine equipment have greatly been improved.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the schematic block circuit diagram of cylinder of diesel engine diagnostic device embodiment of the present utility model;
Fig. 2 is the sensor scheme of installation of cylinder of diesel engine diagnostic device among Fig. 1.
Embodiment
Shown in Fig. 1～2, be the synoptic diagram of the embodiment of a kind of cylinder of diesel engine diagnostic device of the present utility model.In the present embodiment, this diagnostic device comprises processing unit, high-speed synchronous A/D converter 13, display device (LCD, perhaps other output devices, for example print device etc.), keyboard, memory device (SRAM, EEPROM, FLASH), communication interface (LAN, RS485, RS232, USB), power source conversion device (DC/DC), cylinder head vibration transducer 14, cylinder jacket vibration transducer 15, oil pressure sensor 16 etc.Wherein cylinder head vibration transducer 14 is installed on the cylinder head top platform 21; Cylinder jacket vibration transducer 15 is installed on the cylinder jacket sidewall 22; Oil pressure sensor 16 is clamped on the high-pressure oil pipe 23.Above-mentioned cylinder head vibration transducer 14, cylinder jacket vibration transducer 15 and oil pressure sensor 16 are connected to the high-speed synchronous A/D converter via signal conditioning circuit respectively, and input is handled from CPU.
In the present embodiment, processing unit is by host CPU 11, form from CPU 12, and wherein host CPU is responsible for functions such as operation, demonstration, data management, communication, for example can adopt the ARM of PHILIPS Co. chip LPC2468; Be responsible for the real time high-speed collection and the data processing of data from CPU, for example can adopt TI (TIX) Company DSP chip TMS320C5402.When specific implementation, also can adopt a high performance CPU to replace above-mentioned host CPU 11 and from CPU 12.
Cylinder head vibration transducer 14, cylinder jacket vibration transducer 15 are respectively applied for the vibration signal that detects cylinder head and cylinder jacket, cylinder head vibration transducer 14, cylinder jacket vibration transducer 15 all adopt the magnetic base vibration transducer in the present embodiment, in establish prime amplifier, rely on magnetic force can be installed to easily on cylinder head top platform 21 and the cylinder jacket sidewall 22.Oil pressure sensor 16 is the external clamping type oil pressure sensor, is used to detect the pressure wave signal of high-pressure oil pipe 23.Owing to adopted the field erected structure of convenience, so all the sensors all can install when diesel engine is worked and remove easily, can not produce any influence to the work of diesel engine.
Above-mentioned diagnostic device is when work, cylinder head vibration transducer 14, cylinder jacket vibration transducer 15 and oil pressure sensor 16 detect cylinder head vibration signal, cylinder jacket vibration signal and high pressure pipe pressure ripple signal respectively, and above-mentioned detection signal are entered the input port of high-speed synchronous A/D converter 13 behind signal conditioning circuit.
The sample frequency of high-speed synchronous A/D converter 13 is by controlling from the timer of CPU 12, pulse mode is adopted in timer output, satisfy the pulsewidth requirement that starts 13 conversions of high-speed synchronous A/D converter, and can reach the purpose of the frequency that changes sampling by the value of timer is set.The each detection at cylinder head vibration signal, cylinder jacket vibration signal and high pressure pipe pressure ripple signal through high-speed synchronous A/D converter 13 synchronized samplings 4096 times obtains 3 * 4096 sampled signals.High-speed synchronous A/D converter 13 is sent into from CPU 12 and is handled after the vibration of the cylinder head of sensor, cylinder jacket vibration and oil pressure analog-signal transitions are digital signal.Because diesel engine belongs to high speed machine equipment, distribution, oil spout all there are strict phase place requirement, common A/D converter can't reach the synchronous acquisition requirement of detection signal.The high-speed synchronous A/D converter of this cylinder of diesel engine diagnostic device adopts 12 the parallel A/D converter (for example programmable multiple A/D conversion chip THS1206 of TIX) of 6MHZ, and it can guarantee that multiple signals sample simultaneously.
Because cylinder head surface vibration signal, cylinder-barrel surface vibration signal and high pressure pipe pressure ripple signal have stronger nonlinear characteristic, adopt traditional linear algorithm to be difficult to identification.Wavelet decomposition and reconstruct have good phase propetry, therefore adopt the way of wavelet decomposition and reconstruct to come separation signal to cylinder head surface vibration signal, cylinder-barrel surface vibration signal and high pressure pipe pressure ripple signal, remove the phase characteristic of noise and stick signal.Vibration signal, high pressure pipe pressure ripple signal being trained, discerned from the employing BP of CPU 12 elder generations neural network of this device carried out wavelet decomposition and reconstruct to vibration signal and pressure signal, again to remove denoising.On this basis, further calculate the characteristic parameter of cylinder of diesel engine from CPU: 1) cylinder head vibration values, 2) cylinder jacket vibration values, 3) inlet valve, exhaust valve closing vibration values, 4) injection pressure value, 5) injection advance angle, 6) port timing, 7) injection pressure waveform exceptional value, 8) cylinder head, cylinder jacket vibrational waveform exceptional value.
At last the characteristic parameter and the original detection signal of cylinder are passed to host CPU 11 from CPU 12, host CPU 11 is sent data into the FLASH storage, host CPU 11 shows characteristic parameter form with form on LCD simultaneously, vibration and the original detection signal of oil pressure are shown on LCD with the form of curve, to help the maintenance personal accurately to judge the diesel engine fault place, guide maintenance work.When the cylinder of diesel engine diagnostic device is in the networking state, host CPU also can be sent to the remote monitoring center server by modes such as Ethernet, GPRS, RS232/485 with the characteristic parameter of raw data and calculating, to realize setting up remote online monitoring net and Remote Diagnosis System, can utilize authoritative expert and the large database on the mainframe computer in the industry to carry out the remote analysis diagnosis, instruct on-the-spot maintenance job for the expert system of fundamental construction.
Keyboard is used for input parameter, and for example function selecting, parameter are provided with etc.
Cylinder of diesel engine diagnostic device described in the utility model and method, adopt Cylinder Vibration and charge oil pressure ripple frequency domain analysis and temporal analysis analyzing and diagnosing cylinder of diesel engine state, abrasion condition and oil supply system duty, compare with traditional diesel engine detection method, have tangible advantage:
1, can be used as " dynamic cardiograph " of diesel engine, the diesel engine that need not disintegrate just can carry out " health check-up " to diesel engine, judges whether diesel engine work is normal.
2, can search diesel engine fault fast, and fault be positioned guide maintenance work.
3, can realize on-line monitoring to visual plant such as railway locomotive, foreign-going ship and naval vessels and mega-construction project diesel engine mechanically, the potential faults that equipment is occurred gives warning in advance the support equipment safe operation.
4, utilize the communication function of described device, can set up diesel engine work status remote monitoring net, set up database and expert system, realize remote diagnosis, and guide maintenance job the various knotty problems of diesel engine.
5, provide technological means from present " periodic maintenance " system to the change of " state maintenance " system for the engine maintenance system, improve the coverage ratio of equipment greatly, reduce maintenance cost simultaneously.
6, the modern management level and the maintenance levels of Chinese large-sized motive power machine equipment have greatly been improved; Cylinder of diesel engine condition diagnosing technology described in the utility model and device are owing to adopted modern digital information technology, can set up database to the detection data of every diesel engine manages, difference fully digitalization before and after the state of different times, the maintenance has greatly improved the modern management level and the maintenance levels of Chinese large-sized motive power machine equipment.
The foregoing description only is explanation technical conceive of the present utility model and characteristics; its purpose is to allow the personage that is familiar with this technology can understand content of the present utility model and is implemented; can not limit protection domain of the present utility model with this; all equivalences of being done according to the utility model spirit change or modify, and all should be encompassed in the protection domain of the present utility model.
Claims (10)
1. cylinder of diesel engine diagnostic device, it is characterized in that, comprise processing unit, the high-speed synchronous A/D converter, output device, be used to detect the cylinder head vibration transducer of the vibration of cylinder cover for diesel engine, be used to detect the cylinder jacket vibration transducer of the vibration of cylinder jacket, be used to detect the oil pressure sensor of the pressure wave of fuel feeding high-pressure oil pipe, described cylinder head vibration transducer, the cylinder jacket vibration transducer, oil pressure sensor is connected with processing unit through high-speed synchronous A/D sensor respectively, described cylinder head vibration transducer is installed on the cylinder head top platform, the cylinder jacket vibration transducer is installed on the cylinder jacket sidewall, and oil pressure sensor is clamped on the high-pressure oil pipe.
2. cylinder of diesel engine diagnostic device according to claim 1 is characterized in that, described cylinder head vibration transducer, cylinder jacket vibration transducer all adopt the magnetic base vibration transducer.
3. cylinder of diesel engine diagnostic device according to claim 1 is characterized in that, described oil pressure sensor adopts the external clamping type sensor and is clamped on the high-pressure oil pipe cylinder head inlet horizontal segment.
4. cylinder of diesel engine diagnostic device according to claim 1, it is characterized in that, described processing unit comprise the host CPU that is used for data management and be used for data acquisition and processing (DAP) from CPU, describedly be connected to host CPU from CPU, described output device is connected to host CPU, and described high-speed synchronous A/D converter is connected to from CPU.
5. cylinder of diesel engine diagnostic device according to claim 1 is characterized in that, described output device is display device or print device.
6. cylinder of diesel engine diagnostic device according to claim 1 is characterized in that, described high-speed synchronous A/D converter adopts the synchronous A/D converter of multichannel.
7. cylinder of diesel engine diagnostic device according to claim 1 is characterized in that, described cylinder head vibration transducer, cylinder jacket vibration transducer and oil pressure sensor are connected to the high-speed synchronous A/D converter via signal conditioning circuit respectively.
8. cylinder of diesel engine diagnostic device according to claim 1 is characterized in that, also is provided with communication interface, and described communication interface is connected to processing unit.
9. cylinder of diesel engine diagnostic device according to claim 1 is characterized in that, also comprises memory device, and described memory device is connected to processing unit.
10. cylinder of diesel engine diagnostic device according to claim 1 is characterized in that, also comprises power supply unit, and described power supply unit includes the power source conversion device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202057333U CN201583407U (en) | 2009-09-30 | 2009-09-30 | Device for diagnosing cylinder of diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202057333U CN201583407U (en) | 2009-09-30 | 2009-09-30 | Device for diagnosing cylinder of diesel engine |
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| Publication Number | Publication Date |
|---|---|
| CN201583407U true CN201583407U (en) | 2010-09-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009202057333U Expired - Fee Related CN201583407U (en) | 2009-09-30 | 2009-09-30 | Device for diagnosing cylinder of diesel engine |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104807650A (en) * | 2015-05-15 | 2015-07-29 | 山东大学 | System and method for intelligently analyzing comprehensive performance of high-power engine |
| CN107576459A (en) * | 2017-08-10 | 2018-01-12 | 中国北方发动机研究所(天津) | A kind of Engine Cylinder Sealing detection means |
| CN111811826A (en) * | 2020-08-03 | 2020-10-23 | 武汉理工大学 | Diesel engine real machine test platform and method for analyzing comprehensive performance of cylinder sleeve-piston ring |
| CN112796879A (en) * | 2020-12-21 | 2021-05-14 | 中国船舶重工集团公司第七一一研究所 | On-line testing method and device for air valve clearance of marine diesel engine |
-
2009
- 2009-09-30 CN CN2009202057333U patent/CN201583407U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104807650A (en) * | 2015-05-15 | 2015-07-29 | 山东大学 | System and method for intelligently analyzing comprehensive performance of high-power engine |
| CN107576459A (en) * | 2017-08-10 | 2018-01-12 | 中国北方发动机研究所(天津) | A kind of Engine Cylinder Sealing detection means |
| CN111811826A (en) * | 2020-08-03 | 2020-10-23 | 武汉理工大学 | Diesel engine real machine test platform and method for analyzing comprehensive performance of cylinder sleeve-piston ring |
| CN112796879A (en) * | 2020-12-21 | 2021-05-14 | 中国船舶重工集团公司第七一一研究所 | On-line testing method and device for air valve clearance of marine diesel engine |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100915 Termination date: 20150930 |
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| EXPY | Termination of patent right or utility model |