エンジン主軸受の油量低減に関する研究

概要

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To reduce the oil flow rate of an engine main bearing, decreasing of the supply oil pressure and the changes of the bearing dimension were investigated by using the measurements of the oil flow rate, the observation of oil flow and the mass conserving elasthydrodynamic lubrication model. The decreasing of the supply oil pressure was an effective method to reduce the oil flow rate of the bearing largely, but caused an occurrence of aeration in the oil passage at higher supply oil oressure, and seemed to decrease the bearing reliability. As the alternatives of the above method, the changes of bearing clearance shape and the bearing housing shape were found to be effective in reducing the oil flow rate. The factors of the both effectiveness were assumed to be the suppression of the large oil flowing out from the bearing separation surface, and a phenomenon of the oil sucking back on the bearing ends, respectively.
一般社団法人日本機械学会の論文
2008-07-25