What is the practical significance of viscosity index?

What is the practical significance of viscosity index? 2018 - 11 - 16 the modern industrial age, the equipment is the foundation, the basis of lubrication is to ensure the normal operation of equipment. 'modern industry is riding on the 10 & mu; 'm on the oil film, it fully shows the importance of lubrication for modern industry. Lubrication is one of the key links of modern industry, has become a social consensus. But there are still some friends don't understand, do not take for lubrication technology applications. Today, share with you 'viscosity index practical application significance. Viscosity index refers to the degree of viscosity change under different temperature of lubricating oil, used to describe the performance of the lubricating oil viscosity changes over temperature. As the temperature changes, the smaller the lubricating oil viscosity changes, prove that the viscosity of lubricating oil temperature, the better. All lubricating oil is the lower the temperature, the greater the viscosity, the higher the temperature, the smaller the viscosity. Equipment there is a range of friction pair of lubricating oil viscosity requirements, regardless of the lubricating oil in cold or hot car ( Low or high temperature) Cases, you must ensure lubricating oil viscosity can keep within a certain range, can provide the lubrication effect of full-time, the stand or fall of this kind of performance is through the viscosity index to reflect. According to the viscosity index of different lubricating oil can be divided into three: 35 ~ 80 for the viscosity index of lubricating oil; 80 ~ 110 for high viscosity index of lubricating oil; More than 110 for high viscosity index of lubricating oil. Usually the industrial oil viscosity index above 90.