|Effects of Air Contamination on Machinery and Lubricants
|Dr Raj Shah
|Ms Shi Ying Zheng
Mr Stanley Zhang
|Koehler Instrument Company, Inc.
Abstract Information :
Air found in fluids has negative effects on lubrication, hydraulic systems, and reservoirs. The effect of air in lubricating oil depends on the quantity of air, its distribution, and its orientation. Lubricants and hydraulic fluids are often developed with a major focus on viscosity, oxidation resistance, and air involvement and discharge. Air can exist in lubricants in dissolved, entrained, and foam forms. These three types of air contamination have significant impacts on both the physical and chemical properties of the lubricant and system. The most common condition that causes excessive air contamination is water contamination. Other causes include too little or too much antifoam additives, suction leaks, poor reservoir design, or using the wrong viscosity. Air bubbles can decrease the fluids pressure transmission because air is more compressible than the surrounding fluid, which leads to poor component response and causes cavitation. Additionally, the temperature reduction and oxidation of the lubricant would result in oil degradation. In this poster, we will discuss the measurement of air quantities in oil and the determination of the ability of an oil to separate entrained air via ASTM D3427. rn