Kinetics of motor oil aging in marine diesel engines under continuous and periodic refill to compensate loss

M. I. Tarasov, Gennadiy Petrovich Kicha
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引用次数: 2

Abstract

The article considers the balance of the engine oil aging components in the diesel engine lubrication system with the refinement of oil composition caused by the oil product loss. The motor oil aging process has been identified under continuous and periodic oil refill in order to replenish the lubrication system with fresh oil which would compensate the burnt off oil products. There were derived and solved the differential equations of the oil product balance for such aspects of aging as contamination by insoluble impurities and multifunctional additives impact, which helped understand the general regularities and kinetics of the studied process. Novelty of the approach to theoretical description of the process consisted in the fact of filtering the insoluble and colloidal components of mechanical impurities and additives by the purification and burnout means. Cyclic picture of aging allows to analyze the state of the oil aging before and after refill with its periodic refreshment. The dependence is transformed and presented in a form where it is possible to determine the state of the oil at each aging cycle, without examining the intermediate concentrations of impurities and additives. The advantage of the obtained kinetic integral expressions for oil aging is the ability to determine the conditions for a long-term or permanent mode of its use in the lubrication system of a diesel engine. There are given the formulas by which the intensity of filtration and the concentration of additives in fresh oil or the time of their impact are calculated at a given oil loss and provide a pre-rejection mode of using circulating luboil in a diesel engine.
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连续和定期补油补偿下船用柴油机机油老化动力学
本文从油品损失引起的机油成分的细化出发,考虑柴油机润滑系统中机油老化成分的平衡问题。为了给润滑系统补充新鲜的机油以补偿燃烧掉的油品,在连续和定期加油的情况下,确定了发动机机油的老化过程。推导并求解了不溶性杂质污染和多功能添加剂影响等老化过程中油品平衡的微分方程,有助于了解研究过程的一般规律和动力学。该工艺的理论描述方法的新颖性在于通过净化和燃尽手段过滤机械杂质和添加剂的不溶性和胶体成分。老化循环图,通过周期性的更新,分析油在充油前后的老化状态。这种依赖性被转化为一种形式,在这种形式下,可以确定每个老化周期的油的状态,而不需要检查杂质和添加剂的中间浓度。所获得的机油老化动力学积分表达式的优点是能够确定其在柴油机润滑系统中长期或永久使用模式的条件。给出了在给定机油损失下计算过滤强度和新鲜机油中添加剂浓度或其影响时间的公式,并提供了在柴油机中使用循环润滑油的预排斥模式。
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