高速牙轮钻头轴承密封副设计与有限元分析

HIGH SPEED JOURNAL SEAL OF CONE BIT DESIGN AND FINITE ELEMENT METHOD ANALYZE

用于石油天然气勘探开发的牙轮钻头轴承润滑密封系统的寿命 ,在很大程度上决定了钻头的使用寿命。为了提高轴承密封的可靠性 ,根据其工作的摩擦学特性 ,通过有限元分析 ,对钻头轴承端面—径向组合密封的结构进行了分析研究 ,据此设计了新型密封副。理论与实践证明 。

The life span of cone bits is almost directly decided by the life of bit journals,which depends in great degree on the life of their seals. To enhance the reliability of journal seal of cone bit,this paper presented the face-radial combination sealing structure,that is to say,end-face and radial seal was arranged in one bit simultaneously. The design of sealing structures were analyzed and optimized with the nonlinear finite element methods, and the new seal mate was designed. Theoretically and practically, it provided that the new seal combination structure can adapt to the developing trend of high speed cone bit in lubricating system of journal seal.