CN85204613U - Suspended ferromagnetic particles sensor in insulating fluid - Google Patents
Suspended ferromagnetic particles sensor in insulating fluid Download PDFInfo
- Publication number
- CN85204613U CN85204613U CN 85204613 CN85204613U CN85204613U CN 85204613 U CN85204613 U CN 85204613U CN 85204613 CN85204613 CN 85204613 CN 85204613 U CN85204613 U CN 85204613U CN 85204613 U CN85204613 U CN 85204613U
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- electrode plate
- magnet
- intermediate electrode
- sensor
- capacitive sensor
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- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
The utility model belongs to a capacitive sensor, mainly comprising a magnet, an end face parallel electrode plate, an intermediate electrode plate and an insulating washer. The end face parallel electrode plate is provided with grooves in equal space on one face which faces to the intermediate electrode plate. The inner part of the grooves are fully filled with brass and are burnished in order to form a nonuniform magnetic field; the iron base abrasive dust in a lubrication system is absorbed on a capacitor plate under magnetic force in order to cause variation of electric capacity. The variation of electric capacity is converted into electrical pulse signal and is input to an electronic computer. The capacitive sensor is an important sensing element of a whole abrasion monitoring machine. The capacitive sensor has stable work and strong iron base abrasive dust capturing ability; the flow of lubrication can not be influenced because that too much iron dust is absorbed. Electrical pulse signal can be put out at any time in order to achieve the effect of detecting continuously.
Description
The utility model belongs to capacitance type sensor.
Wearing and tearing are the principal elements that cause machine ages, break down and damage.The wearing and tearing of monitoring machinery are to grasping the state of the art of machine, and are economical, use machine rationally, reliably, safely, and diagnosis, prediction mechanical disorder etc. are necessary technology means.Present monitoring technology is that the form of abrasive dust is come the abrasion condition of monitoring machinery, judges the state of machine by the content of wear metal in the detection lubricating system.Method commonly used is that the appointed part of machine is regularly taked candidate oil, adopts spectrum and iron spectrum to analyze.This method is more time-consuming and can not continuous monitoring, for this reason, has developed a kind of candidate oil that need not to take, and can be reliably, the instrument of detection machine abrasion condition continuously.This instrument mainly partly is made of sensor, interface circuit, microcomputer, registering instrument, power supply etc.Purpose of the present invention is that acquisition is a kind of to the metal filings sensitivity, can reflect the sensor of state of wear at any time.
General capacitance type sensor is by formula C=(ε S)/(d), when the useful area of S(pole plate) and the d(two-plate between distance) when constant, the variation of DIELECTRIC CONSTANT will influence the variation of electric capacity C.The content that reflects metal filings by the variation of electric capacity.But, in the monitoring system, metal filings in the lubricating oil is trace (PPM level) extremely, " apparent " to medium between capacitor the two poles of the earth---the specific inductive capacity influence is atomic, so that the electric capacitance change that is almost completely caused by the variation of other condition is covered, and the long-term physical and chemical performance that causes that uses of lubricating oil changes, and also can cause the variation of DIELECTRIC CONSTANT, so be difficult to the reflection real conditions.Sensor of the present invention has been done improvement from structure., polish after being covered with brass in the groove facing to opening equal-space groove on the one side of intermediate electrode plate at the both ends of the surface parallel electrode plate, formed non-uniform magnetic-field like this, improved the iron-based abrasive dust thus and be attracted to ability on the capacitor plate.The iron-based abrasive dust is adsorbed on the variation that has caused electric capacity on the capacitor plate by magnetic force, changes this electric capacitance change into electric pulse through suitable circuit.Along with the electric capacity difference, the frequency of pulse just changes, the action principle of Here it is this sensor.
Sensor is made of magnet (1), magnet frame (2), end face parallel electrode plate (3), gusset (4), shell (5), intermediate electrode plate (6), insulating washer (7).Place cerium-cobalt rare-earth permanent magnet of one 25 millimeters * 25 millimeters * 5 millimeters respectively in two end face parallel electrode plates (3) outside, outer cover magnet frame (2), these two blocks of magnet can be dismantled.Two diameters are that 50 millimeters end face parallel electrode plate (3) welds together with shell (5), and link to each other with ground wire.Diameter of two end face parallel electrode plate sandwich is 50 millimeters a intermediate electrode plate (6), separates with insulating washer (7).Gusset (4) is fixed by bolts on the shell.Facing to opening equidistant groove on the one side of intermediate electrode plate, groove is of a size of 2 millimeters * 2 millimeters * 2 millimeters at two end face parallel electrode plates, and spacing is 2 millimeters, polishes after being covered with non-magnet material such as brass in the groove.In order to cause non-uniform magnetic-field, two end face parallel electrode plates also can be combined into by fillet magnet, accompany non-magnet materials such as brass between the fillet magnet.To the magnetic field short circuit, shell is made with non-magnetic conductive metal material for fear of shell.Too much cause electric pole short circuit for fear of iron filings absorption, middle battery lead plate (6) is carried out surface insulation with silicon rubber handle.Two end face parallel electrode plates (3) and intermediate electrode plate (6) all use electrician's soft iron to make.
Sensor is a vitals in the monitor.During test, sensor is positioned on appropriate location in the lubricating system.Lubricating oil enters from sensor inflow point, flows through from the end face parallel electrode plate (3) and the space of intermediate electrode plate (6).Iron-based abrasive dust in the lubricating system is adsorbed on the variation that causes electric capacity on the capacitor plate by magnetic force.Through oversampling circuit, be the change transitions of electric capacity electric pulse, the electric impulse signal of sensor being sent here by other device becomes digital signal input robot calculator then, finishes the task of whole monitoring machinery wearing and tearing.
Working sensor of the present invention is stable, and its degree of stability can reach 7.4 * 10
-5In/time, sensitivity reaches 0.25PPm.It is strong to iron-based abrasive dust capture ability, can be owing to the more iron filings of absorption not influence flowing of oil, and output electric pulse signal at any time reaches the effect of continuous detecting.
Description of drawings:
Fig. 1 sensor master cut-open view
Fig. 2 sensor left side cut-open view
Fig. 3 sensor is overlooked semisectional view
Fig. 4 sensor signal extension line hole cut-open view
(1) magnet among the figure, (2) magnet frame, (3) end face parallel electrode plate, (4) gusset, (5) shell, (6) intermediate electrode plate, (7) insulating washer, (8) signal extension line hole.
Claims (4)
1, a kind of sensor, formed by magnet (1), magnet frame (2), end electrode plate (3), gusset (4), shell (5), intermediate electrode plate (6), insulating washer (7), it is characterized in that intermediate electrode plate (6) places in the middle of two blocks of end electrode plates, the one side that faces toward intermediate electrode plate at two blocks of end electrode plates has equidistant groove, fills non-magnet material in the groove.
2, by the described sensor of claim 1, it is characterized in that two blocks of end electrode plates also can be combined into by fillet magnet, accompany non-magnet material between the fillet magnet.
3,, it is characterized in that intermediate electrode plate makes surperficial insulation processing with silicon rubber by claim 1 or 2 described sensors.
4, by claim 1 or 3 described sensors, it is characterized in that intermediate electrode plate and end electrode plate, shell all being insulated with insulating washer (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85204613 CN85204613U (en) | 1985-11-01 | 1985-11-01 | Suspended ferromagnetic particles sensor in insulating fluid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85204613 CN85204613U (en) | 1985-11-01 | 1985-11-01 | Suspended ferromagnetic particles sensor in insulating fluid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN85204613U true CN85204613U (en) | 1986-07-23 |
Family
ID=4799885
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 85204613 Ceased CN85204613U (en) | 1985-11-01 | 1985-11-01 | Suspended ferromagnetic particles sensor in insulating fluid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN85204613U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102830043A (en) * | 2012-07-29 | 2012-12-19 | 淮海工学院 | Equipment for detecting viscosity of lubricating oil and content of iron filings in lubricating oil |
| CN101509882B (en) * | 2008-02-13 | 2013-12-04 | 涡轮梅坎公司 | Magnetic advance signal plug |
| CN105909593A (en) * | 2016-05-12 | 2016-08-31 | 绍兴文理学院 | Abrasion particle monitoring method based on magnetic field centrifugation, electric shock hammer adsorption and adjacent capacitance |
| CN107328828A (en) * | 2017-07-05 | 2017-11-07 | 厦门大学 | Aircraft engine oil chip is detected and analysis integrated design method and device |
| CN110954250A (en) * | 2018-12-05 | 2020-04-03 | 奇异平台股份有限公司 | Multi-axis force sensor |
-
1985
- 1985-11-01 CN CN 85204613 patent/CN85204613U/en not_active Ceased
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101509882B (en) * | 2008-02-13 | 2013-12-04 | 涡轮梅坎公司 | Magnetic advance signal plug |
| CN102830043A (en) * | 2012-07-29 | 2012-12-19 | 淮海工学院 | Equipment for detecting viscosity of lubricating oil and content of iron filings in lubricating oil |
| CN102830043B (en) * | 2012-07-29 | 2014-06-11 | 淮海工学院 | Equipment for detecting viscosity of lubricating oil and content of iron filings in lubricating oil |
| CN105909593A (en) * | 2016-05-12 | 2016-08-31 | 绍兴文理学院 | Abrasion particle monitoring method based on magnetic field centrifugation, electric shock hammer adsorption and adjacent capacitance |
| CN107328828A (en) * | 2017-07-05 | 2017-11-07 | 厦门大学 | Aircraft engine oil chip is detected and analysis integrated design method and device |
| CN110954250A (en) * | 2018-12-05 | 2020-04-03 | 奇异平台股份有限公司 | Multi-axis force sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CE01 | Termination of patent right |
Termination date: 19870204 |
|
| CE01 | Termination of patent right |