双端面机械密封原理与单端面机械密封基本相同，都是靠垂直于旋转轴线的端面（摩擦副）在流体压力和补偿机构弹力的作用以及辅助密封的配合下保持贴合并相对滑动而构成的防止流体泄漏的装置。
径向双端面机械密封 [机] radial double mechanical seal
双端面机械密封- double mechanical seal
轴向双端面机械密封 [机] axial double mechanical seal
径向双端面机械密封- radial double mechanical seal
平衡式双端面机械密封 balanced double mechanical seal
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轴封采用新颖的双端面机械密封结构形式。
本文阐述并分析了轻烃泵用双端面机械密封的特点，提出了改进方法和设计依据。
This paper describes and analyses the reasons of the failure of dual-encl-face mechanical seal for hydrocarbon pump and proposes a reformation and design method.
由二套BIA机械密封背靠背安装，共用一个弹簧可组成一套双端面机械密封型式。
Two sets of back-to-back assembled mechanical seal BIA, and together with a Shared spring can form a double mechanical seal.
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