LUBRICATION MECHANISM OF SOLID LUBRICANTS PARTICLES ADDED INTO LUBRICATING PILS

本文通过两个滚子和滚动轴承在摆动运动中的滚滑接触，研究了含有固体润滑剂颗粒的润滑油或润滑脂的抗划伤能力和抗微动磨损能力。研究了振动轴承的工作条件，如载荷、摆角和频率等对微动寿命的影响，作为微动轴承抗微动能力的参考。提出了一种评价润滑油在滚滑接触中抗点蚀性能的试验方法。研究结果如下：1.考察了含二硫化钼、石墨、氟化碳和氮化硼微粒润滑油的抗划伤能力。(1)氟化碳和氮化硼与分散剂配合使用，具有良好的抗划伤能力，并降低了摩擦系数。(2)添加钼或石墨既不能提高抗划伤能力，也不能改善摩擦特性。2.由于试验辊表面粗糙度的影响对点蚀寿命有决定性影响，提出了一种新的试验方法，即不更换较硬的滚子作为试验油，并通过试验证明了这种方法的有效性。微动，即所谓的假布氏压痕，微动寿命定义为振荡次数，直到由于磨损引起的内圈与外圈的相对位移达到一个阈值。(1)在脂润滑情况下，随着温度的升高，油膜形成状态（用电阻法测量）变好，微动寿命增加。(2)振荡角和频率对微动寿命的影响与油膜形成状态有关。(3)在不形成油膜的条件下，含二硫化二锑的润滑脂表现出良好的抗微动性能。

Scoring proof capability and fretting proof capability of lubricating oils or grease containing solid lubricantsparticles have been investigated by roliing-sliding contact of two rollers and rolling bearings in oscillatory motion. As a reference of fretting proof capability, the effect of operatlng condition such as racial load, oscillationangle and frequency on fretting llfe of osciallatory bearing was studied. And a new test methcd to evaluate antipittinvg performance of lubricating oiis in rolling-sllding contact. th findings are as foll0ws :1.Scoring proof capability of lubricating oils containing particles of molybdenum disulfide, graptdte, carbonfluoride or boron nitride were investigated. (1) Carbon fiuoride and boron nitride added together with a dispers-ant have good scoring proof capability and decrease the coefficient of friction. (2) Addition of molybdenum disfilnde or graphite neither improved scoring proof cability nor modified the frictional characteristics.2.Because the effect of surface roughness of test rollers has decisive effect on pitting life, a new test method in wich the harder roller is not replaced for test oils to be evaluated was phned and proved effective by experiments.3.As for the quite heavy wear in rolling bearings in oscillatory motion due to fretting, which is called as false brinelling, the fretting life was defined with the oscillation number until the relative displacement of the innerring to the outer ring due to wear reached to a threshold. (1) In the case of grease lubrication, as temperature rises, the state of oil-film formation (measured by the electric reslstancc methcd) becomes beetter and the fretting llfe increases. (2) the effect of the oscillation angle and frequency on fretting life can be correlated with thestate of oil-filn formation. (3) A grease containing molydenum disulfide exhibited the pcxssibillty of frettingproof capabillty in the condition in which oil-fiim did not formed.