On-line lubrication oil trace moisture sensor based on conductivity measurement
A technology of trace moisture and lubricating oil, applied in the direction of material impedance, etc., can solve the problems of unavoidable bubble influence, deviation, large measurement results, etc., and achieve the effect of online monitoring and automatic alarm
Active Publication Date: 2012-08-08
西安永泽华正信息科技有限公司
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Problems solved by technology
The invention patent with the application number 201010295276.9 mentions the EASZ-1 series products of Diwason Company of the United States based on the capacitance method of the dielectric constant, and points out that the products of this series are only suitable for the situation of high moisture content, and cannot be used for trace moisture content. accurate measurement
At the same time, the obvious disadvantage of this type of product is that it cannot avoid the influence of air bubbles.
If there are air bubbles in the lubricating oil, the measurement results will have a large deviation
Method used
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[0030] figure 1 As shown, the specific embodiment of the probe of the online lubricating oil micro-moisture sensor based on conductivity measurement of the present invention is composed of an insulating cylinder 3, an enameled wire a, and an enameled wire b. The enameled wire a and the enameled wire b are wound on the insulating cylinder 3 close to each other in parallel, and the thick part of the diameter of the enameled wire is cut off to make the copper core part of the two enameled wires exposed to form a measuring electrode. One end of the two enameled wires is suspended in the air. The other end is connected to the circuit respectively.
[0031] figure 2 It is a specific embodiment of the voltage stabilizing part of the sensor test circuit of the present invention: 24V DC power supply is connected from one end of the diode D1, the other end of the diode D1 is connected in series with a resistor R1, and the resistor R1 is connected with the three-terminal voltage regula...
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The invention discloses an on-line lubrication oil trace moisture sensor based on conductivity measurement, which comprises a sensor probe, a sensor casing and a sensor test circuit. The sensor probe is fixed on an upper end cover of the sensor casing through interface fit mode, and the circuit is fixed in a bottom casing of the sensor casing in threaded connection mode. The on-line lubrication oil trace moisture sensor based on the conductivity measurement can measure minimum 0.1% moisture content in lubrication oil and can detect whether free water exists in the lubrication oil, measurement results are not influenced by bubbles, the on-line lubrication oil trace moisture sensor based on the conductivity measurement can be installed on a mechanical device to perform on-line real-time monitoring so as to achieve on-line monitoring and automatic alarm of whole life cycle of the lubrication oil. Measurement range and accuracy are adjustable so as to achieve different measurement requirements.
Description
technical field [0001] The invention relates to the field of oil liquid monitoring, in particular to an online, small-volume, high-precision lubricating oil trace moisture sensor. Background technique [0002] Lubricating oil pollution is one of the important reasons for mechanical equipment failure, and water pollution is one of the main reasons for lubricating oil pollution. According to statistics, when the moisture content of lubricating oil reaches 0.1%, the oil starts to become cloudy, and when the moisture content of lubricating oil reaches 0.4%, the bearing will be severely worn. Experiments show that: with the gradual increase of water content, the wear resistance of lubricating oil gradually decreases. When the water content exceeds 0.4% and reaches 1% or even higher, the anti-wear property drops sharply, and the lubricity of lubricating oil loses. Therefore, real-time monitoring of the 0.1% to 1% moisture content and its state in lubricating oil is of great signi...
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Inventor 武通海张小刚张乐彭业萍张亚丽
Owner 西安永泽华正信息科技有限公司