The importance of lubricants in virtually all fields of the engineering industry is reflected by an increasing scientific research of the basic principles. Energy efficiency and material saving are just two core objectives of the employment of high-tech lubricants. The encyclopedia presents a comprehensive overview of the current state of knowledge in the realm of lubrication. All the aspects of fundamental data, underlying concepts and use cases, as well as theoretical research and last but not least terminology are covered in hundreds of essays and definitions, authored by experts in their respective fields, from industry and academic institutes.
lubricants and lubrication mang pdf 22
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Prof. Dr.-Ing. Theo Mang received his diploma in mining engineering in 1963 and his PhD in chemical engineering in 1967 (University of Clausthal, Germany). He has been Professor at the Faculty of Mechanical Engineering of the RWTH Aachen, Germany, since 1998. He started working in the field of lubricants at Fuchs in Mannheim in 1967 and became head of the technical department in 1980. He has been a member of the Executive Board of the global Fuchs Group from 1983 until 2001, responsible initially for technology and later for group purchasing and human resources. Professor Mang is a recipient of the Georg-Vogelpohl-Award of the German Society of Tribology and has published about 80 publications.
Lubricants are very important consumables in all industries as failure in machine parts due to absence or wrong choice of lubricants carries enormous cost. The base oil used for the formulation of most lubricants is environmentally hostile mineral oil and 30% of lubricants consumed ends up in the ecosystem. However, mineral oil reserve is depleting and the environmental concern about the damaging impact of mineral oil is growing. The search for environment friendly substitutes to mineral oils as base oils in lubricants has become a frontier area of research in the lubricant industry. Vegetable oils are perceived to be alternatives to mineral oils for lubricant base oils due to certain inherent technical properties and their ability to be biodegradable. This paper is an overview of recent research on vegetable oils as base oil for lubricant production with focus on the prospects, challenges and efforts to overcome the challenges of using vegetable oils as base oil for the production of industrial lubricants. Compared to mineral oils, vegetable oils in general possess high flash point, high viscosity index, high lubricity, low evaporative loss, are renewable, and are environmentally friendly. Poor oxidative and hydrolytic stability, high cost, food versus energy debate, high temperature sensitivity of tribological behaviour and poor cold flow properties are reckoned to be the limitations of vegetable oils for their use as base oils for industrial lubricants. The current effort to overcome these limitations includes the use of non edible oils, additives, chemical modifications and thermal modifications. More research and legislation in favour of the use of vegetable oil lubricants is recommended.
An oil line or oil passage that is open, broken or disconnected will cause low engine oil pressure. The engine builder should check each oil passage for debris and wear. Sometimes oil galleries can be out of alignment where the holes are not lined up correctly to allow normal oil flow. Check that the oil lines are hooked up properly and that there is not a tear in the line.An open lubrication system could also be caused by a piston cooling nozzle that is missing or damaged. Piston cooling nozzles direct engine oil towards the bottom of the piston in order to cool the piston. These nozzles also provide lubrication for the piston pin. Incorrect installation, restriction of normal movement or breakage of the piston cooling nozzlescould result in the seizure of the piston itself.
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