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首页> 外文会议>7th Biennial Conference on Engineering Systems Design and Analysis 2004(ESDA 2004) vol.1: Advanced Energy Systems; Advanced Heat Transfer in Engineering Systems; ... >Abrasive Wear of Piston Grooves of Highly Loaded Diesel Engines
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Abrasive Wear of Piston Grooves of Highly Loaded Diesel Engines

机译：高负荷柴油机活塞槽的磨料磨损

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摘要

The rate of wear of piston grooves on the piston is mainly a function of the peak cylinder pressure, hardness, surface roughness, depth of penetration and the number of hard particles produced by combustion or entering past the air filter. The problem of wear becomes severe as the blowby past the rings and oil consumption of the engine increases in diesel engines. In this paper, an attempt is made to estimate the wear of piston grooves quantitatively. The wear rate is correlated with the product of gaseous load, amount of hard particles past the piston lands, radius of abrasive particles, and inversely with hardness of the groove surface. Under abnormal conditions, the shear strain due to friction exceeds the plasticity limit of the material and superficial delamination occurs at the groove surface. The model was validated on a large bore engine running on heavy fuel at 22-bar bmep and the abrasive wear predicted by other earlier models are discussed.
机译：活塞上的活塞槽的磨损率主要取决于气缸的峰值压力，硬度，表面粗糙度，渗透深度以及燃烧或进入空气过滤器后产生的硬颗粒数量。在柴油机中，随着越过环的漏气和发动机的机油消耗增加，磨损问题变得更加严重。在本文中，尝试定量地估计活塞槽的磨损。磨损率与气体负载，经过活塞平台的硬质颗粒的数量，磨粒的半径以及凹槽表面的硬度成反比。在异常情况下，由摩擦引起的剪切应变超过了材料的可塑性极限，并且在凹槽表面发生了表面分层。该模型在大缸发动机上以22 bar bmep的重油运行，并通过其他早期模型预测的磨料磨损进行了验证。

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