Smooth and easy to identify oil and fat

Equipment maintenance, often demand discriminant smooth quality stand or fall of oil, grease, and the movement state of the equipment, the influence of the fault reason. Analyze the condition of no tests, using some simple and easy way to identify, it is necessary to clearly. 1. Smooth oil easy to identify ( 1) Viscosity test: usually apply equipment once smooth oil, and the specification of equipment needs to use the smooth oil viscosity, apply mutatis mutandis to stop inspection, to determine whether needs an oil change. 1) In a clean glass, respectively, a drop of smooth oil for smooth oil and norms. Will drip, flat glass. After good oil drops, tilt the glass again, pay attention to match the speed and flow of oil DiLiu down intervals. The interval velocity, flow is far, relative viscosity is small. If speed is roughly same, the interval of flow match close to the level in the oil viscosity is likely to be the same or close. 2) Using two of the same diameter and length of glass tube, a loading waiting for an oil change, another smooth oil into the specification. Request two in vitro of oil to the same height, and may not be full, set aside a bubble. Then use cork plug tube mouth, the two tube join together, velocity inversion 180 degrees at the same time, review the velocity of bubble rising in vitro. Bubble rising fast in vitro loading is smooth oil, viscosity will compare small; Bubble rising velocity slow smooth tube can be loaded oil, viscosity is compared. If want to distinguish inspected oil is close to that a brand of oil, to be able to use several known brand of oil respectively, and waiting for the oil stopped. When the velocity of bubble rising both close to, can from the viscosity, two kinds of oil quality. （ 2) Moisture test 1) Put waiting for inspection of oil in the boring in vitro, and then in a test tube heating to 100 ~ 120 degrees, at the bottom of the heating and look. If have water exists in the oil, is sound, bubbles, or trying to the walls of condensation of water droplets, and the oil into a muddy state, etc. 2) Put inspected oil in vitro, and then to participate in a small amount of white powder crystal copper sulphate anhydrous, if there is water in the oil, immediately into the blue, and the precipitation in the bottom of the tube. 3) With clean, dry the veil of dip after waiting for the oil to light with fire. If there is water in the oil, or flash explosion phenomenon will attack. （ 3) Mechanical impurities test 1) Low viscosity oil can be injected directly into the test tube, heating after the stationary look. If see a precipitation or suspended solids, mechanical precipitation in oil. 2) Large oil viscosity to 5 ~ 10 times diluted with clean gasoline, according to the above ways to verify. Also can be diluted with filters, if by mechanical impurities, will be retained on the filter paper. 2. Smooth fat easy identification of equipment maintenance in the process of care, to identify the quality of smooth fat, mainly for the change of nature, can be mixed with impurities. （ 1) Smooth fat fiber network structure can attack damage identification: smooth fat fiber network structure if attack damage phenomenon is to adhesion, lower the smooth performance. Identification, to be able to smooth grease paint on a clean piece of copper, and then into the containers of big water stop running, turn after repeatedly, if the oil on the surface of the bead, is to clarify were fat fiber network structure has been destroyed. Obviously this method is only suitable for smooth fat stop identification of resistance to water. （ 2) Water resistance identification: fat, if is not clear how the water resistance, available fingers take a small amount of fat, a little water drop, with a little twist, if the rapid attack emulsification phenomena were fat, can smooth discriminant for sodium based grease. If no attack emulsification phenomenon, can discriminant is smooth calcium base grease or smooth lithium base grease, smooth or barium base grease. If emulsified slow and incomplete, it can distinguish is smooth sodium calcium base grease. （ 3) Presence of impurities in the identification of 1) Take a little fat stop twisting with finger pressure, discriminant checked after feel fat can be mixed with the hard particles. 2) Will smooth the average dose of besmear is on clean glass, coating thickness thin at 0. 5 mm or so, in the light will stop check, is whether there are samples in the fat particles impurities. 3) Take a small amount of fat in the test tube, to gasoline to stop dissolved, examine whether precipitation. 4) Oxidation transformation identification: whether seizures smooth lipid oxidation metamorphosis, from appearance can see very clearly. At this time, the color of the fat black or deepen, and appearance will constitute a hard film.