Factors affecting the viscosity of oil insulating oil products
2018/5/15 Viewers:
The viscosity of oil products determines the effect of oil on the hydraulic system, lubrication system and insulating oil system. The factors that affect the viscosity of the oil are as follows: (1) it is related to the fraction of the base oil. In general, the heavier the distillate from the same petroleum, the greater the viscosity. Conversely, the lower the fraction of the cut, the smaller the viscosity. That is to say, the viscosity of the same petroleum fraction increases with the increase of boiling point and decreases with the decrease of boiling point. It is related to the chemical composition of oil. A large number of experiments show that in the same fraction, the viscosity of alkanes is the smallest, the viscosity of ISO paraffins is slightly higher than that of n-alkanes, and the viscosity of cyclic hydrocarbons is much larger than that of alkanes, and the viscosity of glial and non hydrocarbon is the greatest. In the annular channel, the viscosity increases with the increase of the number of rings. The viscosity of oil has a great relationship with the temperature. The viscosity decreases with the increase of temperature and increases with the decrease of temperature. But this change is not linear, sometimes more stable. In addition, this change is related to the composition and refining process of crude oil. (2) the pressure and speed of liquid acting on the liquid also affect the viscosity. What is the principle of determining the kinematic viscosity of oils by capillary rule? Measuring the viscosity of liquids by absolute measurement is generally very troublesome, and it is not easy to get higher measurement accuracy. Therefore, the viscosity of the tested liquid is compared with that of the known viscosity by means of a capillary viscometer. This method is called relative measurement. Because it is measured by the same capillary viscometer, the value of V is the same.
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