润滑管理的重要内容是做好油质监测，做到按质换油。正确实行润滑油检测，随时掌握润滑油质量的变化情况，科学的按质换油，合理延长润滑油的使用寿命，减少设备磨损，节约能源。做到科学润滑，又节约用油。按质换油不能只凭经验确定，而应通过检测用数据说话，借助测试手段，定期检测油质变化的情况以确定换油周期，润滑油在使用过程中，难免要不断老化变质，甚至完全报废。如在使用过程中加强对润滑油的质量维护与监控，则可以预防因不良润滑而导致的机器磨损和故障。
在用油即正在设备中使用的油品。在用油的监测，关注的是油品在运行中物理化学性质及使用性能的变化梯度、设备的磨损状况以及密封状况(污染状况)，即通过理化分析、磨损分析、污染分析来判断油品是否应跟换、设备是否有异常磨损、密封状态是否良好等。
在用油分析属于定期的跟踪趋势分析，除了特征性理化指标分析，污染分析、化学组分分析外，还要突出磨粒的含量、组成、尺寸、形态和形貌及在油中的浓度分布等磨损分析。不仅关注润滑油的劣化变质程度，更要通过油液分析获得的信息来判断机械设备的运行状态。
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