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

Abstract

The invention discloses an online monitoring method for the water content and the pollution degree of lubricating oil of a rolling mill, and belongs to the field of monitoring instruments of industrial equipment. The method includes the steps that (1) dielectric constants of the measured oil and comparison oil at real-time temperature are measured in real time through a capacitive sensor probe electrode by means of a capacitive sensor signal processing circuit; (2) the change value of the dielectric constant, measured in real time at the real-time temperature, of the measured oil relative to the dielectric constant of the comparison oil is worked out through a microprocessor and a data display and storage device; and (3) according to a sensor water content sensitivity coefficient calibrated in advance, the water contents corresponding to two adjacent sampling times are worked out in a sequential and progressive increasing mode according to a sampling interval, and the change slope of the water contents relative to schedule time is worked out. According to the method, temperature compensation and other compensations are not needed, and the comprehensive overall pollution degree, the water content and other quality indexes of the measured oil can be monitored online; the method can be widely applied to the aspect of state monitoring and fault diagnosis of mechanical equipment.

Description

[0001] The patent application of the present invention is a divisional application with the application number: 2014104560661. The filing date of the original application is: September 9, 2014. The name of the invention is: an online monitoring device for water content and pollution degree of rolling mill lubricating oil and its monitoring method. technical field [0002] 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 [0003] 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...

AI Technical Summary

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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