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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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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Main components: two-rotor, the body, the main bearings, shaft seal, balance and energy-conditioning Pistons.

主要部件：双转子、机体、主轴承、轴封、平衡活塞及能量调节装置。

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