Calibration method of oil pollution degree analyzer

Abstract

The invention discloses a method for calibrating an oil pollution degree analyzer. Controllable gravimetric sedimentation and ultrasonic sieving techniques are used to prepare seven kinds of dry powders whose particle size distribution obeys normal distribution and whose standard deviation is less than 30%. Quasi-monodisperse MTD particle standard material, the nominal particle size of the standard material covers the commonly used measurement range of oil pollution analyzers, and the particle number concentration can be freely configured according to requirements, so this standard material can meet the needs of oil in different concentration ranges Calibration of the particle size stop of the pollution analyzer. Because the uncertainty of the obtained dry powder quasi-monodisperse MTD granular standard substance is less than 3% (k=2), it is far below the fixed value uncertainty of the existing polydisperse MTD standard substance, and for each particle During the calibration process of the radial stop, a sufficient number of particles can be measured and counted, which improves the measurement repeatability of the calibration process. Therefore, the uncertainty of the calibration result of the oil pollution level analyzer is greatly improved, which is better than 6% (k=2).

Description

technical field [0001] The invention relates to the field of calibration and measurement of an oil pollution degree analyzer (liquid particle counter), in particular to a calibration method for an oil pollution degree analyzer. Background technique [0002] Mechatronic-hydraulic integration technology has been widely used in aviation, aerospace, machinery, ships, engineering equipment and many other technical and industrial fields. Among them, the hydraulic system is one of the core systems to ensure the performance and normal operation of electromechanical-hydraulic integrated equipment. In the hydraulic system, hydraulic oil is the working medium for transmitting power and signals, and also plays the role of cooling, lubrication and rust prevention. When the hydraulic system is working normally, solid particle pollutants with different particle sizes will be produced in the hydraulic oil due to external intrusion, system wear and other factors. When the hydraulic oil is s...

AI Technical Summary

Problems solved by technology

This characteristic of the sample makes the number of statistically measured particles less when calibrating the large particle size range of the oil pollution analyzer, resulting in poor measurement repeatability and large uncertainty in the calibration results, such as ≥30μm particles The calibration uncertainty of the radial stop reaches 30%, which cannot meet the needs of the instrument

Images