关于发动机机油控制环下轨与机油控制环槽下翼之间油膜厚度的研究

Ken Miura, Akemi Ito, Yuta Nakamura, Rina Yamada, Koichi Nishibe, Miyuki Usui, Naoki Iijima
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引用次数: 0

摘要

发动机的润滑油消耗(LOC)会导致废气中的微粒物质和异常燃烧(如预点火),这已成为氢发动机的一个严重问题。润滑油通过滑动面、间隙、活塞环的侧面和背面向上输送到发动机的燃烧室。本研究的目标是阐明机油在机油控制环下侧面和凹槽之间流动的机理,凹槽是曲轴提供的润滑油的第一个入口。采用激光诱导荧光法测量了控油环下侧面的油膜厚度,测量时使用了嵌入环槽下侧面的光纤。将测得的油膜厚度与作用在三片式控油环下导轨上的力进行了比较。结果发现,在本研究测试的所有工作条件下,滑动面上的摩擦力和环槽中的压力对油膜厚度的影响最大。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A Study On the Oil Film Thickness Between the Lower Rail of Oil Control Ring and Lower Flank of Oil Control Ring Groove of an Engine
Lubricating oil consumption (LOC) of engines causes particulate matter in exhaust gas and abnormal combustion like pre-ignition which becomes a serious problem in hydrogen engines. Lubricating oil transports upward into the combustion chamber of an engine via the sliding surface, the gap, and the side and back of a piston ring. The target of this study was clarifying the mechanism of oil flowing between an oil control ring lower flank and the groove which was the first entrance of lubricating oil supplied from the crank shaft. Oil film thickness at the lower flank of the oil control ring was measured by laser induced fluorescence method using optical fibers embedded in the lower flank of the ring groove. The measured oil film thickness was compared with forces acting on the lower rail of three-piece type oil control ring. The oil film thickness change was well explained using those forces and it was found that friction force at the sliding surface and pressure in the ring groove were dominant on the oil film thickness under all operating conditions tested in this study.
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