Lubricating oil viscosity testing the best temperature of 40 ℃ and 100 ℃ is should be?

Lubricating oil viscosity testing the best temperature of 40 ℃ and 100 ℃ is should be? 2019 - 07 - 07 detection lubricating oil viscosity, the best test temperature is how many degrees? It should be 40 ℃ or 100 ℃? Viscosity is one of the most important indicator of lubricating oil, lubricating oil is suitable for use, first of all depends on whether the viscosity in the range of requirements. Viscosity is not appropriate, so is unfavorable use of lubricating oil, so the viscosity lubricating oil is common testing project. When testing the viscosity, generally has two kinds of kinematic viscosity and absolute viscosity detection, especially in the majority with kinematic viscosity. Why viscosity test to determine the temperature? To test the viscosity of the lubricants, all of us are selected, a temperature in the temperature measurement, because viscosity changes with temperature changes. The same kind of lubricating oil, measured at different temperatures of viscosity is not the same. As temperatures rise, lubricating oil will be rare, viscosity decreased. When the temperature is reduced, lubricating oil viscosity increased, oil thickens. Detection of viscosity, 40 ℃ and 100 ℃? At present, the lubricating oil is generally in 40 ℃ or 100 ℃ measuring viscosity, specific in 40 ℃ and 100 ℃, depends on the specific circumstances, is not optional. Determination of temperature on viscosity, best is close to the temperature of the equipment operation. In general, industrial lubricants in 40 ℃ when testing viscosity, because of industrial equipment operation temperature close to this range. In addition, the lubricating oil viscosity at low temperature change is relatively more prominent, therefore, if you want to test some abnormal factors caused by the viscosity changes, such as in the lubricating oil into the water, mixed with oil, the viscosity change with the oxidation and so on, in 40 ℃ low temperature are relatively easy to detect. But some equipment operation temperature is relatively high, in order to make detection temperature close to use, we should test viscosity at high temperature, such as automobile engines, general is at 100 ℃ testing viscosity. Calculation of the lubricating oil viscosity index some equipment may experience a larger temperature changes in the operation, in this case, we need to measure a high temperature viscosity and viscosity at low temperature. Such as multistage oil used in the lubrication situation of temperature change is bigger, multi-stage oil is the two temperature measuring viscosity, a high temperature viscosity, a viscosity at low temperature. Through these two viscosity, we can calculate the lubricating oil viscosity index. In the case of temperature change during operation is larger, the lubricating oil viscosity index is a very important indicator. In high viscosity index, the lubricating oil temperature, viscosity is relatively more stable. The detection of lubricating oil viscosity, want to clear up a few questions: 1, the temperature at which the normal operation of equipment. 2, equipment operation, whether there will be a large temperature fluctuations, More than 20 - 30℃） 吗? 3, if you want to and other sample viscosity comparison, test condition ( Including temperature) Should be consistent.