The Application Significance of Petroleum Kinematic Viscosity Tester

The oil kinematic viscosity tester is used to measure the friction resistance between liquid molecules when the liquid moves in laminar flow under external force (that is, the movement of Fluid parcel is regular, the particles are mixed and do not interfere with each other, and move in laminar or flow bundle), so the liquid part has a certain viscosity.。

◆ The viscosity can determine the processing conditions, determine the cutting range of the fraction, and determine the refining depth of the lubricating oil. In lubricating oil refining, the more polycyclic aromatic hydrocarbons and colloids with short side chains are removed, the lower the viscosity of the refined oil. Usually, the viscosity of unrefined distillate oil is higher than that of sulfuric acid refined distillate oil, and the viscosity of distillate oil refined with selected solvents is higher.

◆ Viscosity is one of the important indicators of jet fuel oil. Because the viscosity of jet fuel has the greatest impact on the degree of fuel atomization, and the quality of fuel oil atomization determines the necessary degree of atomization for jet engines at different temperatures, viscosity requirements at 20 ℃ and -40 ℃ are specified in the jet fuel specification standards.

◆ Viscosity is one of the important properties of diesel fuel, which can determine the atomization and combustion of diesel within the internal combustion engine. If the viscosity is too high, the oil droplets sprayed by the nozzle are large, the atomization state is poor, the air mixing is insufficient, and the combustion is incomplete, which affects the power consumption of the engine; If the viscosity is too low, it is prone to volatilization and significant loss, which can also affect the lubrication of the oil pump and increase plug wear.

◆ Viscosity is an important quality indicator of lubricating oil. If excessive viscosity of lubricating oil is used, it will reduce engine power, increase fuel consumption, and easily cause difficulty in engine starting. If lubricating oil with too low viscosity is used, it is difficult to form an oil film in the lubrication area, resulting in "dry friction" between the two friction surfaces, which cannot achieve the lubrication purpose and increases the wear of the machine.
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