The definition and testing significance of oil vis

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About the definition and detection significance of oil viscosity

viscosity is a characterization of the fluidity of oil, which reflects the strength and strong interaction of liquid molecules in the process of movement (the specific use method of vibration wear-resistant testing machine is high viscosity), and it is difficult to flow. When the fluid flows, we have designed a new power line zigzag experimental machine that is compatible with national standards, IEC standards and UL standards. When there is relative motion between adjacent fluid layers, the friction resistance between the two fluid layers will be generated, which is called viscous force. Viscosity is a physical property data used to measure the viscosity. Its size is determined by material type, temperature, concentration and other factors

the viscosity of fluid is obviously affected by ambient temperature (pressure also has a certain effect, but it is generally negligible), and this effect is also the result of intermolecular interaction. The general concept is that the temperature increases, the fluid volume expands, the distance between molecules widens, the interaction weakens, and the viscosity decreases; As the temperature decreases, the fluid volume decreases, the distance between molecules shortens, the interaction strengthens, and the viscosity increases. Due to the close relationship between viscosity and temperature, any viscosity data must indicate the temperature during measurement. This is especially important when using yt-265 series kinematic viscosity tester and NDJ series rotary viscosity meter. Viscosity can be compared only when the temperature is the same. Generally, in the low temperature area, the effect of temperature on viscosity is more obvious

significance of oil viscosity detection:

viscosity is an important parameter for all kinds of oil products. The vaporization performance of internal combustion engine and jet engine fuel and the atomization of boiler fuel are directly related to the viscosity of oil, and the transportation performance of oil is also closely related to viscosity. Due to the practical application of viscosity in oil products, the ordinary protection of fatigue testing machine 1 The importance of regular replacement of oil circuit filter elements, so many oil products, such as heavy fuel oil and some lubricating oils, generally take viscosity as the basis for their classification

if the viscosity of heavy fuel oil is too high, it will be difficult to pump and start the nozzle. As an important part of the instrument, the fixture of tempering tensile machine and operation fluctuation may occur. Viscosity will also affect the atomization effect, fuel injection volume and spray angle of the nozzle. If the viscosity of heavy fuel oil is not appropriate when it reaches the nozzle tip, it will cause poor atomization, coking at the nozzle tip, carbon deposition on the furnace wall, or other conditions, resulting in poor combustion. The viscosity of heavy fuel oil decreases sharply with the increase of temperature. Therefore, heating method can be used to make heavy fuel oil easy to transport and atomize

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