润滑和载荷状态对聚甲醛齿轮服役性能的影响  

Effects of Lubrication and Loading Levels on POM Gear Durability Performance

作　　者：卢泽华 刘怀举[1] 朱才朝[1] 余国达 钟兵兵 LU Zehua;LIU Huaiju;ZHU Caichao;YU Guoda;ZHONG Bingbing(State Key Laboratory of Mechanical Transmissions, Chongqing University, Chongqing, 400044)

机构地区：[1]重庆大学机械传动国家重点实验室,重庆400044

出　　处：《中国机械工程》2021年第17期2047-2054,共8页China Mechanical Engineering

基　　金：国家自然科学基金(51775060)。

摘　　要：基于齿轮耐久性能试验台开展了一系列干接触/油润滑下POM(聚甲醛)-POM齿轮副承载能力试验,并测量了服役过程中的轮齿温度、磨损量、齿廓精度和齿面形貌。试验发现,POM齿轮失效形式与载荷和润滑方式有关。通过对齿面微观形貌和磨屑表征,确认干接触下POM齿轮主要磨损模式为黏着磨损与磨粒磨损,而油润滑下POM齿轮失效形式为接触疲劳失效。由于润滑油减少了齿面摩擦,降低了运行温度,延缓了齿面劣化程度,因此POM齿轮在油润滑下的承载能力明显提高。A series experimental work on the load capacity of POM-POM gear pairs was conducted based upon a gear durability test rig,together with the measuring examination of tooth temperature,wear volume,tooth profile deviation and surface morphology.Several loading levels were chosen under both of the dry contact and the lubrication conditions.Experimental results reveal that the failure modes of POM gears are related to the loading levels and lubrication modes.The wear modes of POM gears are identified as adhesive wear and abrasive wear through the characteristic analysis of tooth flank microtopography and debris.Meanwhile,the failure mode of POM gears under oil lubrication is contact fatigue failure.As the oil reduces the tooth surface friction and running temperature,the tooth surface deterioration is delayed and the load capacity of POM gears increases.

关 键 词：聚甲醛齿轮 润滑方法 轮齿温度 磨损模式 失效形式 

分 类 号：TH132.413[机械工程—机械制造及自动化]