经多年现场试验、解剖分析,发现牙轮钻头的损坏多半是由轴承损坏而引起的,而轴颈跑道、特别是滚柱跑道又是决定轴承性能和寿命的最主要部分。为此,了解滚柱的运动规律(是全滑动、全滚动、还是滚动滑动均存在,它们的运动轨迹又如何?)就显得非常必要。在资料缺乏的条件下,我们对牙轮钻头的滚柱运动状态进行了探索性的模拟试验和分析计算。 After many years of field test and anatomical analysis, it is found that the damage of roller cone bit is mostly caused by the bearing damage, while the journal runway, especially the roller track, is the most important part that determines the bearing performance and life expectancy. For this reason, it is necessary to understand the laws of the movement of the rollers (whether full-slide, full-roll, or roll-to-slide, and how are their trajectories?). In the absence of data, we conducted exploratory simulation tests and analysis of roller roller cone motion conditions.