再生柴油机润滑油使用周期理化指标的衰变特性

Decay Characteristics of the Physical and Chemical Indexes of a Regenerated Diesel Engine Lubricating Oil during Its Service Period

为验证再生润滑油的使用性能,以通过膜蒸馏技术制备的再生15W-40润滑油为研究对象,开展了再生润滑油使用周期内理化指标的衰变特性研究,分析了再生润滑油使用过程中的黏度、酸值、碱值、水分含量、不溶物含量、元素含量等指标的衰变过程.结果表明,在规定的使用周期内,除酸值增加值之外,再生润滑油的黏度变化率、碱值降低率、水分含量、不溶物含量、Fe、Al、Cu等磨损元素和Si等污染物元素含量满足GB/T 7607—2010中规定的换油限值要求,再生润滑油的抗氧化能力相对较差,污染度相对较高.建议再生润滑油的生产过程中应特别注意提高其抗氧化能力,并降低污染度.

To verify the using feasibility of regenerated lubricating oil, a regeneration 15w-40 lubricating oil for bus diesel engine generating from used 15w-40 lubricating oil with membrane distillation was used as the research object, the decay of the physical and chemical indexes i.e. viscosity, acid value, alkali value, water content, insoluble matter and etc. were studied during the lubricating oil service period. The result showed that during the prescribed service period, along with the service time, the viscosity change rate, alkali value reduction ratio of base value, the water and insoluble matter content, as well as the Fe, A1, Cu and Si elements content were lower than the limit value from GB/T 7607--2010 which indicate when the oil should be changed except for the increase amount of acid value. The antioxidant capacity and contamination level of regenerative lubricating oil were relatively poor compare with that of original 15w-40 lubricating oil. Therefore, we should pay particular attention to improve the antioxidant capacity and to reduce contamination level during the production of regenerative lubricating oil.