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Oil liquid abrasive grain on-line monitoring method and system

A technology of oil abrasive particle monitoring system, applied in measurement device, particle suspension analysis, suspension and porous material analysis, etc., can solve the problems of inability to determine the specific type of abrasive particles, high price, and hysteresis of analysis results.

Inactive Publication Date: 2009-03-25
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

However, offline detection requires sampling, the analysis period is long, the cost is high, and the analysis results have a certain lag
The existing online monitoring sensors for oil wear particles are generally only suitable for large wear particle detection. For example, the oil wear particle monitor MetalSCAN produced by GasTops in Canada is only suitable for the monitoring of wear particles with a size above 70um, and the price is very expen

Method used

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  • Oil liquid abrasive grain on-line monitoring method and system
  • Oil liquid abrasive grain on-line monitoring method and system
  • Oil liquid abrasive grain on-line monitoring method and system

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[0016] 1. System structure

[0017] The system consists of figure 1 As shown, the on-line wear particle electrostatic monitoring subsystem (including electrostatic sensor 1, charge amplifier 7 and dynamic signal test analyzer 8) wear particle image online acquisition and analysis subsystem (including oil analysis chip 5, microscope 11, light source 12) And 15, industrial digital camera 10), oil intake system (including pump 2, micro pump 4, diverter device 3, oil pipeline 17).

[0018] Electrostatic sensor structure such as figure 2 As shown, it is composed of an electrode 18, a shielding cover 19, an insulating tube 20, and an insulator 21. The materials of the electrode, shielding cover, insulating tube and insulator in the sensor are copper, brass, quartz glass and polytetrafluoroethylene respectively. The specific structural dimensions are optimized based on the theoretical model of the sensor's electrostatic field and through finite element analysis. In this example, the se...

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Abstract

The invention relates to an online monitoring method and an online monitoring system for oil abrasive particles of a machine, which belong to the field of monitoring of the wear condition and failure diagnosis of a machine. The method monitors the wear condition of the machine by utilization of the principle that the oil abrasive particles are provided with net charges and the static signals are stronger when the concentration of the charged abrasive particles is high. The system comprises an abrasive particle online monitoring subsystem, wherein the subsystem is formed by a static sensor (1), a charge amplifier (7) and a dynamic signal test analysis instrument (8) in turn. The invention designs the abrasive particle online monitoring system on the basis of combination of static images and microscopic images aiming at the defects of the oil abrasive particle offline monitoring technology and the prior online monitoring technology. The system is suitable for online monitoring of abrasive particles with the thickness of more than 5 micrometers, and has low cost.

Description

technical field [0001] The oil abrasive particle online monitoring system of the present invention monitors the abrasive particle concentration, abrasive particle size, quantity and type in the machine oil in real time, provides a theoretical basis for wear state judgment, fault diagnosis and condition-based maintenance, and belongs to machine wear state monitoring and field of fault diagnosis. Background technique [0002] Oil wear particle analysis is an important means of wear state monitoring. At present, the off-line detection technology of oil wear particles has been developed relatively mature, including ferrography analysis technology, spectral analysis technology, particle counter, etc., which respectively provide oil samples from the aspects of wear particle type, composition, size and wear particle number statistics. Information on abrasive grains. However, offline detection requires sampling, the analysis period is long, the cost is high, and the analysis resul...

Claims

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Application Information

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IPC IPC(8): G01N15/06G01N15/00G01N27/60
Inventor 左洪福李绍成文振华卞利
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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