WHAT ARE THE PROPERTIES OF OILS USED IN HYDRAULICS AND LUBRICATION?
Hydraulics is based on Pascal’s Law applied to liquids. Lubrication is based on separation of moving I meshing parts by an oil film. Oil is used only for transmission of energy and lubrication of mating parts. The basic property of oil that is exploited for use in Hydraulic and Lubrication systems is its Viscosity. Viscosity of the oil permits the build up of a thin load bearing film of oil between moving parts, preventing metal to metal contact. Viscosity of oil is temperature dependent and the standard of measurement is at 40 oC. This value is used in design of systems and using oil at temperatures far above or far below 40 oC are both “Off Design” situations. The other properties required to be monitored are… Total Acid Number Contaminants Moisture Acid number is a measure of the oxidation the oil has undergone (table) Contaminants in oil are measured by a) Particle counting: This equipment automatically counts and records the number of particles in oil by electronic sensors. It c
