Abstract

A four-ball extreme pressure test has been performed to study and evaluate the tribotechnical properties of motor oils. The studies have shown that the tribotechnical properties of the engine oil stored in the crankcase during the winter period exhibit a significant change. The average ball wear level has shown a 40% increase compared with that observed in the case of new oil. The average ball wear diameter for the oil samples taken from the combine engines in autumn amounted to 0.5 mm, whereas the average ball wear diameter for the oil samples taken from combine engines in spring amounted to 0.7 mm. When testing new semisynthetic engine oil, the average ball wear diameter varied within 0.48 ± 0.04 mm. It is assumed that the boundary layer formed by the oil is weaker, which causes an increase in the risk of its breaking and sealing the friction pores.

中文翻译：

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联合收割机机油摩擦学性能的实验评估

摘要

已经进行了四球极限压力测试，以研究和评估机油的摩擦技术性能。研究表明，冬季储存在曲轴箱中的机油的摩擦学性能表现出显着变化。与使用新油的情况相比，平均球磨耗水平已显示出40％的增长。秋季从联合收割机发动机取油的平均球磨损直径为0.5毫米，而春季从联合收割机取油的平均球磨损直径为0.7毫米。在测试新的半合成机油时，平均滚珠磨损直径在0.48±0.04 mm之内变化。假设由油形成的边界层较弱，