The main shaft seal of pump turbines with large capacity at high rotational speed is more liable to failure as compared with that of conventional pump turbines.

大容量、高转速水泵水轮机主轴密封相对常规水轮机主轴密封更容易发生故障。

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The main mechanical seal is installed in the shaft on the dynamic in Central and fixed pump shell on the static ring for the relative motion between the end to achieve the objective of sealing.

机械密封主要的是靠装在轴上的动环与固定在泵壳上的静环之间端面作相对运动而达到密封的目的。

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Seal air is injected into the labyrinth seals located at the main motor shaft (top and bottom) and at the pinion shaft driving the motor.

密封空气被注入到主马达轴（顶部和下部）和驱动马达的齿轮轴的迷宫式密封里。

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