Online monitoring device and method of water content and pollution degree of rolling mill lubricating oil

Abstract

The invention discloses an online monitoring device and method of water content and pollution degree of rolling mill lubricating oil, and belongs to the field of industrial equipment monitoring instruments. The online monitoring device comprises N lubrication monitoring modules, wherein electrodes of probes of capacitive sensors in the lubrication monitoring modules are installed on rolling mill lubrication branches or an oil tank and are immersed in detected oil liquid, the electrodes of the probes of the capacitive sensors are connected with a capacitive sensor processing circuit, and output signals of the capacitive sensor processing circuit are transmitted to a microprocessor and a data display and storage device through an acquisition, control and transmission circuit. In the monitoring method disclosed by the invention, water content and pollution degree are distinguished according to the slope of change of dielectric constant values, detected at real-time temperature, of the detected oil liquid with time. The online monitoring device and method of water content and pollution degree of the rolling mill lubricating oil can monitor quality indexes such as comprehensive overall pollution degree and water content of the detected oil liquid on line without making temperature and other compensation, and can be widely applied in aspects of mechanical equipment state monitoring and fault diagnosis.

Description

technical field [0001] The invention belongs to the field of industrial equipment monitoring instruments, and in particular relates to a monitoring instrument for on-site monitoring of the water content of lubricating oil and comprehensive pollution degree, so as to realize the monitoring of the water content of rolling mill lubricating oil and oil pollution state. Background technique [0002] There are a large number of hydraulic circulation systems in steel mills. On-line monitoring of oil pollution technology is an important means to study the wear status of mechanical equipment, carry out equipment status monitoring and fault diagnosis. The pollution form of oil is usually pollution caused by metal abrasive particles, oxides, sludge, carbon, moisture, sediment, fuel oil, hydrogen, chlorine, heat, electricity, air, etc. After the oil is polluted, its physical or chemical properties will change. According to the change of the dielectric constant of the new oil of the same...

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Problems solved by technology

Furthermore, the factors for the change of the dielectric constant of the oil are very complicated, and the fixed compensation formula will also cause certain errors.

At the same time, online monitoring of working conditions and environment also has a certain impact on the measurement circuit and the measured dielectric constant of the oil. In fact, the oil capacitance change measured by this technology based on the dielectric constant measurement itself is also small, and the temperature compensation Errors and the impact of environmental industrial and mining have a great impact on the measurement results, and sometimes even change the measurement results

This has become a major obstacle hindering the application of online monitoring technology

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