1．机械密封件（端面密封件）
1. Mechanical seal (face seal)
密封术语英文：Mehanical seal（face seal）
Mechanical seal (face seal)
密封术语说明：由至少一对垂直旋转轴线的端面在流体压力和补偿机构弹力（或磁力）的作用之下以及辅助密封件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，称之为机械密封件或端面密封件了。
Seal term Description: the device to prevent fluid leakage is composed of at least one pair of vertical rotating axis end faces under the action of fluid pressure and the elastic force (or magnetic force) of compensation mechanism and the cooperation of auxiliary seals to prevent fluid leakage, which is called mechanical seal or end face seal.
2．液体动压式机械密封件
2. Hydrodynamic mechanical seal
密封术语英文：hydrodynamic mechanical seal
Hydraulic mechanical seal
密封术语说明：密封端面设计成特殊的几何形状，利用相对旋转自行产生流体动压效应的机械密封件。
Seal term Description: the seal face is designed as a special geometric shape, and the hydrodynamic effect is generated by relative rotation.
3．切向作用流体动压式机械密封件
3. Tangential acting hydrodynamic mechanical seal
密封术语英文：tangential acting hydrodynamic mechanical seal
Sealing terms: essential acting hydrodynamic mechanical seal
密封术语说明：能在切向形成流体动压分布的流体动压式机械密封件。
Description of sealing terms: hydrodynamic mechanical seals which can form hydrodynamic pressure distribution in tangential direction.