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针对钻井领域的单金属密封端面比压难以控制的问题,结合涡轮钻具支承节结构进行了动密封的总装式设计;初步建立SEMS2单金属密封的计算模型,推导出了SEMS2单金属密封环的轴向载荷公式;考虑润滑油的的挤压效应项,提出SEMS2单金属密封面的油膜压力方程和泄漏率公式;通过有限元软件对SEMS2单金属密封的装配过程进行了应力分析,在此基础上对不同环境压力下密封面的应力特征进行了仿真分析,结果显示低压工况下密封面呈收敛状态,有利于润滑油膜的形成;高压工况下,动环接触面上从内到外的应力逐渐降低,不利于形成润滑油膜。
Aimed at the difficult control of the single metal seal face in drilling field, the design of the seal assembly was combined with the support structure of the turbine drill. The calculation model of SEMS2 single metal seal was preliminarily established, and the SEMS2 single metal seal ring The formula of the axial load is taken into account. The pressure equation of the oil film and the formula of the leakage rate of SEMS2 single metal sealing surface are given considering the squeezing effect of the lubricating oil. The stress analysis of SEMS2 single metal sealing assembly process is carried out by finite element software. The stress characteristics of the sealing surface under different environmental pressures are simulated and analyzed. The results show that the sealing surface is in a convergent condition under low pressure conditions, which is beneficial to the formation of lubricating oil film. Under high pressure conditions, Gradually reduce the stress is not conducive to the formation of lubricating oil film.