| 摘要 |
PURPOSE:To reduce the leakage of liquid by a method wherein a spindle is formed at the outer periphery of a vane and a shroud is attached thereto while seal is formed between the lower end outer rim of the shroud and a metal provided on the inner wall of a pump casing. CONSTITUTION:The spindle 32 is formed at the outer peripheral end of the vane 27 and the shroud 34 is attached thereto using a nut 33. The spindle 32 can be pivoted with respect to the shroud 34 and the lower end outer rim 35 of the shroud 34 is contacted slidingly with the metal 36 attached to the inner wall of a suction pipe 21 to form the seal. According to this method, a pressure loss due to leakage between the tip end of the vane and the inner wall of the casing may be reduced remarkably.
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