LU504713B1 - Electromagnetic Induction-based Real-time Early-warning Monitoring System and Detection Method for Diesel Engine Cylinder Scoring Fault - Google Patents
Electromagnetic Induction-based Real-time Early-warning Monitoring System and Detection Method for Diesel Engine Cylinder Scoring Fault Download PDFInfo
- Publication number
- LU504713B1 LU504713B1 LU504713A LU504713A LU504713B1 LU 504713 B1 LU504713 B1 LU 504713B1 LU 504713 A LU504713 A LU 504713A LU 504713 A LU504713 A LU 504713A LU 504713 B1 LU504713 B1 LU 504713B1
- Authority
- LU
- Luxembourg
- Prior art keywords
- cylinder
- scoring
- fault
- piston
- diesel engine
- Prior art date
Links
- 238000012544 monitoring process Methods 0.000 title claims abstract description 35
- 230000005674 electromagnetic induction Effects 0.000 title claims abstract description 12
- 238000001514 detection method Methods 0.000 title claims abstract description 10
- 239000011553 magnetic fluid Substances 0.000 claims abstract description 15
- 239000010687 lubricating oil Substances 0.000 claims abstract description 10
- 230000005284 excitation Effects 0.000 claims abstract description 8
- 230000008859 change Effects 0.000 claims description 5
- 230000002159 abnormal effect Effects 0.000 claims description 3
- 230000009471 action Effects 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 230000006698 induction Effects 0.000 claims description 3
- 230000000737 periodic effect Effects 0.000 claims description 3
- 238000003786 synthesis reaction Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 3
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000002405 diagnostic procedure Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000003137 locomotive effect Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B77/00—Component parts, details or accessories, not otherwise provided for
- F02B77/08—Safety, indicating or supervising devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
- F01M11/10—Indicating devices; Other safety devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B77/00—Component parts, details or accessories, not otherwise provided for
- F02B77/08—Safety, indicating or supervising devices
- F02B77/083—Safety, indicating or supervising devices relating to maintenance, e.g. diagnostic device
Abstract
The present disclosure aims to provide an electromagnetic inductionbased realtime earlywarning monitoring system and detection method for diesel engine cylinder scoring fault. The system includes a cylinder wall; a cylinder liner is wrapped outside the cylinder wall; monitoring coils are disposed in a circumferential direction of a side wall of the cylinder liner; a magnetic field excitation device is disposed in a top center of the cylinder liner; a piston is disposed inside the cylinder wall; lubricating oil containing magnetic fluid is filled between the piston and the cylinder wall; and the piston is connected to a connecting rod by means of a piston pin to implement a reciprocating motion. By monitoring current signals generated by that the magnetic fluid in the lubricating oil excites a magnetic field to cut the coils, the present disclosure realizes earlywarning monitoring of diesel engine cylinder scoring fault with rapid, realtime and accurate positioning.
Description
DocketNo. x
Electromagnetic Induction-based Real-time Early-warning Monitoring System LUS04713 and Detection Method for Diesel Engine Cylinder Scoring Fault
[0001] The present disclosure relates to a fault monitoring system and method, and in particular to a diesel engine fault detection system and method.
[0002] Marine diesel engines, locomotive diesel engines, and diesel engines for a power station, as key equipment in the industries such as industry, transportation, and chemical industry, have the characteristics of being more in components and parts, interrelated, complicated in movements, harsh in working conditions, and the like. As for the diesel engines, the common faults mainly include cylinder scoring, piston seizure, piston connecting rod and bearing clearance abnormalities, and the like. The cylinder scoring fault is one of the common faults of the diesel engines. Once the cylinder scoring occurs, a machine needs to be disassembled to polish a cylinder liner, and even worse the whole machine needs to be replaced, which sometimes even threatens the safety of human life.
[0003] Cylinder scoring can also be referred to as melting wear or adhesive wear. Diesel engine cylinder scoring refers to the situation that lubricating films between a piston and a cylinder working face and between a piston ring and the cylinder working face are destroyed due to the mutual interactions therebetween, resulting in dry friction, or that friction is increased due to the doping of abrasive particles, which produces a lot of heat and results in melting and adhesion, thus increasing the wear and contact friction with a cylinder wall, and further resulting in a cylinder scoring phenomenon. Cylinder scoring mostly occurs during the running- 1
DocketNo. x in stage of the diesel engine or after a certain period of operation. The timing of cylinder LU504713 scoring is difficult to predict. Once cylinder scoring occurs, it usually causes damage to the diesel engine within a short period of time.
[0004] In view of the problem of diesel engine cylinder scoring fault, although there are many related studies, few methods can be actually used for solving the problem of monitoring and diagnosing the cylinder scoring fault indeed. Diagnostic methods mainly analyze from the perspectives of mechanism research, vibration analysis, friction lubrication, and the like, so that little substantial progress has been made, and the problem has not been solved in a real sense.
[0005] The purpose of the present disclosure is to provide an electromagnetic induction-based real-time early-warning monitoring system and detection method for diesel engine cylinder scoring fault, which utilizes an electromagnetic induction principle to monitor magnetoelectric signals of coils in real time.
[0006] The purpose of the present disclosure is achieved in the following way.
[0007] The present disclosure provides an electromagnetic induction-based real-time early- warning monitoring system for diesel engine cylinder scoring fault, which includes a cylinder wall; a cylinder liner is wrapped outside the cylinder wall; monitoring coils are disposed in a circumferential direction of a side wall of the cylinder liner; a magnetic field excitation device is disposed in a top center of the cylinder liner; a piston is disposed inside the cylinder wall; lubricating oil containing magnetic fluid is filled between the piston and the cylinder wall; and the piston is connected to a connecting rod by means of a piston pin to implement a reciprocating motion. 2
DocketNo.
[0008] The present disclosure provides an electromagnetic induction-based real-time early- LU504713 warning detection method for diesel engine cylinder scoring fault, where when a diesel engine is running, a piston reciprocates under the action of a connecting rod, magnetic fluid in lubricating oil is excited to generate a magnetic field in a same direction as a magnetic field excitation device, and magnetic induction lines of this part of the magnetic field are cut with monitoring coils disposed in a circumferential direction to determine whether the cylinder scoring fault has occurred or not: if a magnetic fluid distribution is uniform, and an induced current with periodic change and stable reproduction is produced, then no cylinder scoring fault occurs; and if an intensity of an induced magnetic field increases, and a waveform amplitude and a phase position of the induced current change compared with those obtained when no cylinder scoring fault occurs, then the cylinder scoring fault occurs.
[0009] The electromagnetic induction-based real-time early-warning detection method for diesel engine cylinder scoring fault provided by the present disclosure may further includes:
[0010] 1. An axial position z of cylinder scoring can be obtained from a phase position of an abnormal protrusion in a waveform of a monitoring graph fed back by the monitoring coils, current waveforms sensed by different monitoring coils distributed in the circumferential direction are analyzed, a circumferential position 9 of the cylinder scoring fault is obtained via vector synthesis, and the axial position z, the circumferential position 6 and a piston radius r are integrated into a cylindrical coordinate system to obtain a worn or scratched position M (x, y, z), that is, a cylinder scoring position.
[0011] The present disclosure has the advantage that although there is currently almost no system solution with rapid, real-time and accurate positioning for the problem of early-warning 3
DocketNo. monitoring of diesel engine cylinder scoring fault, by monitoring current signals generated by LU504713 that the magnetic fluid in the lubricating oil excites a magnetic field to cut the coils, the present disclosure realizes early-warning monitoring of diesel engine cylinder scoring fault with rapid, real-time and accurate positioning.
[0012] FIG. 1 is a schematic structural diagram of the present disclosure;
[0013] FIG. 2 is a schematic partial enlarged diagram of a cylinder scoring position when cylinder scoring occurs;
[0014] FIG. 3 is a schematic diagram of spatial distribution of monitoring coils;
[0015] FIG. 4 is a waveform diagram of a monitoring circuit when no cylinder scoring fault occurs;
[0016] FIG. 5 is a waveform diagram of a detection circuit when cylinder scoring fault occurs;
[0017] FIG. 6 is a schematic diagram of fault position positioning; and
[0018] FIG. 7 is a flowchart of the present disclosure.
[0019] The present disclosure will be illustrated in more detail below in conjunction with accompanying drawings.
[0020] Referring to FIG. 1 to FIG. 7, the present disclosure includes a cylinder liner 1, a cylinder wall 2, monitoring coils 3, a piston 4, a magnetic field excitation device 5, lubricating oil containing magnetic fluid 6, a piston pin 7, a connecting rod 8, and a monitoring circuit 9.
[0021] The cylinder liner 1 is wrapped outside the cylinder wall 2; the monitoring coils 3 are disposed in a circumferential direction of a side wall of the cylinder liner 1 and are used for 4
DocketNo. generating an induced current; and the magnetic field excitation device 5 is disposed in a top LU504713 center of the cylinder liner to provide a circumferential constant magnetic field. The piston 4 is disposed at an inner side of the cylinder wall 2, and the lubricating oil containing magnetic fluid 6 is filled between the piston 4 and the cylinder wall 2. The piston 4 is connected to the connecting rod 8 by means of the piston pin 7 to implement a reciprocating motion up and down.
[0022] The working principle of an electromagnetic induction-based real-time early-warning monitoring system for diesel engine cylinder scoring fault is described as follows.
[0023] Embodiment
[0024] When a diesel engine is running normally, the piston 4 reciprocates under the action of the connecting rod 8. Due to the superparamagnetism of the magnetic fluid, the magnetic fluid can be excited to generate a magnetic field in a same direction as the magnetic field excitation device 5, and magnetic induction lines of this part of the magnetic field is cut with the monitoring coils 3 disposed in the circumferential direction. Since there is no risk of cylinder scoring at this time, the magnetic fluid distribution is uniform, and an induced current with periodic change and stable amplitude is produced, as shown in FIG. 4.
[0025] Embodiment II
[0026] When there is wear or scratch 10 on the cylinder wall or an outer wall of the piston, as shown in FIG. 2, the lubricating oil containing magnetic fluid 6 at a position of wear or scratch 10 on a mating surface of a cylinder and the piston increases, so that an intensity of an induced magnetic field at this position is increased. The monitoring circuit 9 monitors changes in waveform amplitude and phase position of the induced current compared with those in a
DocketNo. normal state, as shown in FIG. 5. An axial position z of cylinder scoring can be obtained by LU504713 monitoring a phase position of an abnormal protrusion in a waveform of FIG. 5; current waveforms sensed by different monitoring coils 3 distributed in the circumferential direction are analyzed; a circumferential position 6 of the cylinder scoring fault can be obtained via vector synthesis; and the axial position z, the circumferential position 6 and a piston radius r are integrated into a cylindrical coordinate system to obtain a worn or scratched position M (x, y, z), that is, a position with a tendency to cylinder scoring, as shown in FIG. 6. At this time, the monitoring circuit alarms and displays the real-time position of the wear or scratch, which facilitates technicians to predict the risk of cylinder scoring in advance and effectively handle the same.
6
Claims (3)
1. An electromagnetic induction-based real-time early-warning monitoring system for diesel engine cylinder scoring fault, comprising a cylinder wall, wherein a cylinder liner is wrapped outside the cylinder wall, monitoring coils are disposed in a circumferential direction of a side wall of the cylinder liner, a magnetic field excitation device is disposed in a top center of the cylinder liner, a piston is disposed inside the cylinder wall, lubricating oil containing magnetic fluid is filled between the piston and the cylinder wall, and the piston is connected to a connecting rod by means of a piston pin to implement a reciprocating motion.
2. An electromagnetic induction-based real-time early-warning detection method for diesel engine cylinder scoring fault, wherein when a diesel engine is running, a piston reciprocates under the action of a connecting rod, magnetic fluid in lubricating oil is excited to generate a magnetic field in a same direction as a magnetic field excitation device, and magnetic induction lines of this part of the magnetic field are cut with monitoring coils disposed in a circumferential direction to determine whether the cylinder scoring fault has occurred or not: if a magnetic fluid distribution is uniform, and an induced current with periodic change and stable reproduction is produced, then no cylinder scoring fault occurs; and if an intensity of an induced magnetic field increases, and a waveform amplitude and a phase position of the induced current change compared with those obtained when no cylinder scoring fault occurs, then the cylinder scoring fault occurs.
3. The electromagnetic induction-based real-time early-warning detection method for diesel engine cylinder scoring fault according to claim 1, wherein an axial position z of cylinder scoring can be obtained from a phase position of an abnormal protrusion in a waveform of a 7
Docket No. monitoring graph fed back by the monitoring coils, current waveforms sensed by different LU504713 monitoring coils distributed in the circumferential direction are analyzed, a circumferential position 8 of the cylinder scoring fault is obtained via vector synthesis, and the axial position z, the circumferential position © and a piston radius r are integrated into a cylindrical coordinate system to obtain a worn or scratched position M (x, y, z), that is, a cylinder scoring position. 8
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211130031.XA CN115585053A (en) | 2022-09-16 | 2022-09-16 | Diesel engine cylinder pulling fault real-time early warning and monitoring system and detection method based on electromagnetic induction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| LU504713B1 true LU504713B1 (en) | 2024-01-11 |
Family
ID=84773097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| LU504713A LU504713B1 (en) | 2022-09-16 | 2023-07-11 | Electromagnetic Induction-based Real-time Early-warning Monitoring System and Detection Method for Diesel Engine Cylinder Scoring Fault |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN115585053A (en) |
| LU (1) | LU504713B1 (en) |
-
2022
- 2022-09-16 CN CN202211130031.XA patent/CN115585053A/en active Pending
-
2023
- 2023-07-11 LU LU504713A patent/LU504713B1/en active
Also Published As
| Publication number | Publication date |
|---|---|
| CN115585053A (en) | 2023-01-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10191012B2 (en) | Monitoring engine components | |
| CN109597344B (en) | A kind of hydroelectric project steel arch-gate real time on-line monitoring system | |
| CN100564851C (en) | The method and apparatus that a kind of lubrication of reciprocating piston combustion engine is used | |
| CN110261268A (en) | A kind of on-Line Monitor Device and its assembly method of metallic particles | |
| US20190063503A1 (en) | Method and apparatus for monitoring a sliding bearing | |
| CN104833510A (en) | Acceleration four-phase frequency bearing fault diagnosis method | |
| LU504713B1 (en) | Electromagnetic Induction-based Real-time Early-warning Monitoring System and Detection Method for Diesel Engine Cylinder Scoring Fault | |
| CN109333161A (en) | A kind of intelligent bolt monitoring system for machine tool main shaft transmission part fault detection | |
| Neugebauer et al. | Condition-based preventive maintenance of main spindles | |
| CA3191229A1 (en) | Method for monitoring the technical condition of a diesel generator when in operation | |
| CN102175579B (en) | Device for monitoring pollution degree of lubricating oil particles according to vibration characteristic | |
| PL193598B1 (en) | Method of and system for determining condition of engine components mutually engaging each other within a combustion engine cylinder and diesel engine, in particular large-size one, incorporating such system | |
| CN116359327A (en) | Steel wire rope monitoring system based on artificial intelligence | |
| CN214278000U (en) | Magnetic powder flaw detection device suitable for surface defects of valve rod | |
| CN112504440B (en) | Online monitoring test device for vibration of rotary machine | |
| Abdulaev et al. | Diagnostic methods and tools for truck parts and components | |
| Peruń et al. | Opportunities to improve the efficiency of the “Gwarek 1200” belt conveyor | |
| Voitov et al. | Integrated approach to vibroacoustic diagnostics of internal combustion engine | |
| Pavlikova et al. | Acoustic camera as a tool for identifying machinery and equipment failures | |
| CN209430719U (en) | A kind of lathe reduction gearbox worm gear tool-wear monitoring device | |
| CN218121279U (en) | Refrigerator leak hunting auxiliary fixtures | |
| Dong et al. | Experimental study of identifying emission sources of acoustic signals on the cylinder body of a two-stroke marine diesel engine | |
| KR102142932B1 (en) | A iron abrasive particle concentration diagnostic sensor in lubricating oil | |
| Cho et al. | Application of neural network for damage diagnosis of marine engine cylinder Liner | |
| JP6788137B1 (en) | Abnormality detection device for inspection objects and abnormality detection method for inspection objects |