Bellmouth, pump, method of manufacturing bellmouth, and method of manufacturing pump

摘要

PROBLEM TO BE SOLVED: To provide a bell-mouth capable of being easily manufactured and smoothly circulating a fluid, a pump including the bell-mouth, a manufacturing method of the bell-mouth, and a manufacturing method of the pump including the bell-mouth.SOLUTION: A bell-mouth includes a peripheral wall, the peripheral wall has an annular first opening end, an annular second opening end separating from the first opening end in an axial direction along an axis, and having a diameter smaller than the first opening end, and a flow channel extended between the first opening end and the second opening end. The peripheral wall includes a curved portion having a curved cross-sectional shape on a cross-section including the axis in at least a part of a region in the axial direction, and the curved portion is composed of at least a part of a plurality of metallic plates arranged in the circumferential direction around the axis.SELECTED DRAWING: Figure 2