Metal melt pump and method for adjusting pump capacity in metal melt pump

摘要

In a metal melt pump that includes a pump chamber part and a drive part, and discharges and sucks by driving the metal melt in the pump chamber of the pump chamber part by the drive part, the pump chamber part, an outer cylinder, and An inner cylinder removably housed in an outer cylinder, the outer cylinder is configured as a bottomed cylindrical body having an outer cylinder bottom wall and an outer cylinder side wall, and the inner cylinder is an inner cylinder bottom wall. A ring having a bottom and an inner cylinder side wall, and a ring interposed between the inner surface of the outer cylinder bottom wall and the outer surface of the inner cylinder bottom wall in a sealed state and in a detachable manner. -Shaped spacer is further provided, and by the spacer, a space between the inner surface of the outer cylinder bottom wall and the outer surface of the inner cylinder bottom wall is partitioned and formed in the pump chamber, and the spacer is formed into another spacer having a different height. Replace the gap between the outer cylinder bottom wall and the inner cylinder bottom wall. Ete by varying the volume of the pump chamber, to adjust the pumping capacity.