![]() ![]() 1 Motion viscometer for petroleum productsĭuring the test, pour the constant temperature medium into the constant temperature cylinder, turn on the heater and set the test temperature.When the temperature of the constant temperature medium reaches the test temperature, the viscometer loaded into the sample is placed vertically in the constant temperature medium for 15 minutes to measure the time of a certain amount of lubricating oil sample flowing The measurement of kinematic viscosity is performed by SYP1003-6 petroleum products kinematic viscosity tester.Figure 1 is the device diagram of petroleum products kinematic viscometer, which is mainly composed of temperature control box, constant temperature cylinder, constant temperature medium, heater, agitator, stopwatch and viscometer.įIG. Kinematic viscosity testing device and method ![]() In order to explore the relationship between kinematic viscosity, density and temperature of PAO oil, we first tested the kinematic viscosity and density of the above lubricating oil samples at different temperatures with petroleum product kinematic viscosity tester and petroleum product density tester. Provided by Sinopec Lubricant Company Tianjin Branch.The kinematic viscosity at 40Â☌ is:32mm2/s, 48mm2/s,68mm2/s, 110mm2/s,125mm2/s. Reference 7ĮXPERIMENTAL DEVICES AND METHODS The test samples were five PAO oil of different viscosity Therefore, it is of great significance to study the viscosity of lubricating oil.ĭomestic scholars have conducted many researches on the viscosity of lubricating oil.Li Xinghu analyzed the effects of temperature and pressure, molecular weight and molecular structure on viscosity of lubricating oil.Li Yong analyzed the influence of constant bath temperature, viscometer viscosity constant, viscometer cleanliness, viscometer installation state, sample cleanliness and other aspects on the measurement results of lubricating oil kinematic viscosity.In 2016, Cui Jinlei studied the relationship between lubricating oil density and viscosity, and proposed a new viscosity pressure relation formula based on density to obtain viscosity. As a quality index of lubricating oil, viscosity has influences on oil film thickness, bearing capacity, mechanical efficiency and friction heat generation, etc, and has become an important factor affecting the service life of equipment. Of its comprehensive high quality performance. The viscosity-density-temperature model of PAO aviation lubricating oil was established. studied the influence of viscosity-temperature characteristics of lubricating oil on power loss of automobile transmission system.Seeton C J studied the relationship between fluid viscosity and temperature.D.Knezevic proposed a mathematical model for the dynamic viscosity of mineral oil in a hydraulic system, varying with temperature and pressure.Bair S studied the variation of the viscosity of various lubricating oils with temperature and pressure.Īt present, the research on lubricating oil viscosity mainly focuses on the influence factors of lubricating oil viscosity, as well as the empirical formulas of temperature- viscosity, temperature-density, temperature- pressure- viscosity.The relationship between viscosity-density- temperature of lubricating oil has not been studied.In this paper, the viscosity and density of PAO oil and the relationship between viscosity and temperature are studied. PAO oil is widely used in all fields of industry because introduces an applied research method for viscosity conversion of lubricating oil at different temperatures, which can realize the rapid calculation of viscosity index of oil with pour point greater than 50Â☌.Ībroad, the Soviet union scholars. Keywords:PAO kinematic viscosity density temperature This formula can be used to predict the viscosity of PAO oil in a certain range of temperature. The newly established viscosity-density- temperature formula can better describe the relationship between viscosity, density and temperature of PAO oil in the range of 30Â☌-110Â☌. The results show that the viscosity and density of PAO lubricating oil decrease with the increase of temperature, and the higher the density of PAO oil, the higher the kinematic viscosity of PAO. The relation on viscosity-density-temperature of PAO oil was established. The relationship between viscosity, density and temperature of PAO oil was analyzed. Study on the Relationship Between Kinematic Viscosity, Density and Temperature of Lubricating Oil PAOġLijun Yang,2Yanshuang Wang,3Erqiang Wang,4Feilang Ningġ234Mechanical Manufacture and Automation 1234Tianjin University of Technology & Education 1234Tianjin, ChinaĪbstractUsing the oil products kinematic viscosity tester and petroleum products density tester the kinematic viscosities and densities of five PAO oils with different initial viscosity were
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