环形胶芯 annuler rubber core
- 文摘:介绍国外旋转控制头的发展现状,对比分析国外环形胶芯型和膨胀胶囊型旋转控制头的性能特点,分析不同类型旋转控制头的密封结构特点,介绍日益增长的旋转控制头的应用,指出旋转控制头的发展方向,建议进行旋转控制头的国产化研究。
Abstract: The paper introduces the status quo of rotary co ntrol head abroad and its application,analyses the sealing structural features o f various rotary control head.Performance features of rotary control head with a nnular rubber core and expansion rubber bag type are compared.The development di rection of rotary control head is proposed out.
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