Reverse The Spiral Tube Debris Sensor Design And Characterization Of Dual Incentive

In order to guarantee the machines working well, in additton to Painstakingly design and carefully construct timely, monitoring equipments' moving can realize the forecasting of equipments' breakdown and maintenance of equipment in advance. As to machine and equioment, losing efficacy of wearing and tearing is about 80%. There are many technologies in monitoring the losing efficacy of wearing and tearing, such as vibration monitoring sound monitoring temperature monitoring wearing debris monitoring in lubricating oil and liquids, etc, and the wearing debris monitoring is the best among them. Because many equipments, using vibration monitoring to find the trouble is later than wearing debris monitoring. That is to say the wearing debris monitoring can provide the trouble information of early phase of equipments. The wearing monitoring have two: on-line and out-line. Out-line monitoring includes spectrum analysis ferrograph analysis scanning electron microscope, etc. On-line monitoring have on-line wear debris counterwear debris analyse instrument, etc. Out-line monitoring may result in thelose of trouble information. On-line ferrograph analysis has long time and only analyze the ferromagnetism debris. The on-line wear counter can not realize the really on-line monitoring. Only the solenoid sensor can realize the wearing debris on-line monitoring in lubricating oil and liquids ofequipments. This kind of sensor can put in the lubricating oil and liquid systems.In this paper, in term of the electromagnetics theory, a reverse-double-exicition solenoid monitoring sensor (abbreviated FSL sensor) is designed in the light of the principles of several kinds of solenoid sensors and using electromagnetics theory to analysis its inductional specific property. The theory analysis shows: (1)the FSL sensor can monitor the diamagnetism and magnetism wear debris in lubricating oil and liquids; (2) the export signal of these two kinds of wearing debris is opposite; (3) the value of range of the export signal is direct ratio with the size of the debris. Using ANASYS software, the the export specific property of FSL sensor of different physical parameters is imitated. The vary conditions of different physical parameters to include: 1) the different size of the coils, 2) the different window areas, 3) the different place where the parties are in the sensor, 4) the different ratio of the circle numbers of the coils, 5) the different circle numbers of the coils, 6) the different coil full coefficients, 7) the different circle number and coil full coefficient of the central inductional coil, 8) the different size of the wear parties, 9) the different material of the wear parties ,10) the different excitation frenquency, etc, the export electric current is obtained. Accordding to the results, with the best geometrical size and coil parameters and exicatation parameters, the sentor is madeand is tested. The results made clear: the FSL sensor can really realize the monitoring the types numbers and sizes of wearing debris in lubricating oil and liquids systems of equipments, and has the characteristics of simple structure , and easily made and operating.If the above studying and designing sensor is going to be put to use, the better design should be perfected. If it can be put to monitor breakdown of the large machines such as the engine of airoplane, the great economic benefit is abtained.