【作者】

Martin Offenbecher,Hellen Li,Emmanuel Laine

【摘要】

论文已在中国上海举行的第27届CIMAC大会上发表。论文的版权归CIMAC所有。Future trends in engine design go towards higher firing pressures, which further increasethe 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 ZDD have been already well researched in the field of gear and valve train systemsover the last decades. For the first time, it was shownthat 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 form-ing 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 bearingmaterials and the employed lubricant formulation.The results obtained so far clearly highlight the need for a combined interdisciplinary development of all compo- nents of journal bearing systems.These are the materials of bearing and shaft as well as the employed lubricants.

【会议名称】

第27届CIMAC会议

【会议地点】

上海

【下载次数】

2

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