| 摘要 |
PROBLEM TO BE SOLVED: To provide a submersible pump and a submersible pump capable of reducing a manufacturing cost.SOLUTION: An impeller 42 housed in a casing 41 of the submersible pump 1, and sending fluid under a pressure by rotating by a rotating shaft 24, molded by casting has an upper shroud 52 fixed to the rotation shaft, a lower shroud 53 arranged facing the upper shroud 52 and having a suction opening in the center of the same, and a pair of blades 54 arranged between the upper shroud 52 and the lower shroud 53, continuing from the center side to the outer periphery side of the upper shroud 52 and the lower shroud 53 and in which a hollow concave part 55 is molded by a core, and is constituted such that a removing hole 60 of the core for molding the concave part 55 is arranged in the upper shroud 52 or the lower shroud 53. |
