Novel trends in journal slide bearing technology - active use of tribochemical effects
Future trends in engine design go towards higher firing pressures, which further increase the tribo-mechanical loading of journal bearing systems to an extent that requires fundamentally new approaches. One of the most important goals in latest research activities is the active use of tribochemical effects of lubricants in journal bearing systems. Positive chemical effects of extreme pressure and anti-wear additives, such as ZDDP, have been already well researched in the field of gear and valve train systems over the last decades. For the first time, it was shown that tribofilms can also form in journal bearing systems, which influence the tribological behaviour significantly. In case of Al-based bearing material, which is rather inert to tribochemical reactions, tribofilms forming on the mating steel counterpart increase the load bearing capacity and also the wear resistance. This fact is due to the lubricity the softer tribofilms impose on the harder steel counterpart. The response of Al-based materials towards film formation is effectively improved by adding selected intermetallic hard phases. The research activities further elucidate a synergistic effect between the design of the bearing materials and the employed lubricant formulation. The results obtained so far clearly highlight the need for a combined interdisciplinary development of all components of journal bearing systems. These are the materials of bearing and shaft as well as the employed lubricants.
Martin Offenbecher Hellen Li Emmanuel Laine Florian Gruen Kartik Pondicherry
Miba Bearing Group,Austria Miba Bearing Group,Jiangsu Province,China Infineum International Ltd,UK Montanuniversitaet Leoben,Austria
国际会议
上海
英文
1-8
2013-05-13（万方平台首次上网日期，不代表论文的发表时间）