The beginning of oil testing at home and abroad
In the 60s of the 20th century, the United States and Britain and other old industrial countries began to carry out preliminary exploration and research on the oil of the hydraulic system according to the development needs of heavy industries such as local manufacturing, national defense, aviation, and chemical industry, so as to have some prototypes of oil detection technology. They took the oil samples to the lab and passed them through some advanced microscopy techniques.
Oils are observed and compared with particles. Later, some filter membranes containing micropores were filtered under vacuum conditions, and the residual particles of oil contamination were carefully observed under high magnification. Some of the best data and results are compared to the original uncontaminated oil samples, and the contamination level of the oil is determined based on the size and size distribution of the particles. But it is clear that there are significant drawbacks to this approach, such as; The detection procedure is too complex, resulting in a long cycle; It is not suitable for monitoring in the operation of the system; There are strict requirements for the experimental environment and experimental operation.
to ensure errors. Sometimes, in order to make the experimental operation easier, simplifying some procedures or carrying out certain oil pretreatment will lead to inaccurate results and affect the final experimental data.