초록 ▼

A suction port (2a) of the pump is submersed in an open-top cylindrical casing (3) coaxial to the impeller axis and equipped with a liquid inlet pipe (4) tangentially discharging the liquid into the casing in the direction of the impeller rotation. The lower portion of the cylindrical casing wall (3

A suction port (2a) of the pump is submersed in an open-top cylindrical casing (3) coaxial to the impeller axis and equipped with a liquid inlet pipe (4) tangentially discharging the liquid into the casing in the direction of the impeller rotation. The lower portion of the cylindrical casing wall (3d) and/or the liquid inlet pipe (4) is designed in the form of a channel or pipe following a radius with center inside the casing, so that the swirling flow generated inside the casing (3), and the inlet flow that enhances said swirling flow, are concentrated and their liquid levels dynamically forced into a vertical level.

대표청구항 ▼

[ What is claimed is:] [1.] In a device for regulating output of a constant-speed centrifugal pump having a vertical pump impeller axis and being of the type includinga suction port (2a) of the pump being submersed in a cylindrical casing (3) having an open top and the cylinder diameter and being co

[ What is claimed is:] [1.] In a device for regulating output of a constant-speed centrifugal pump having a vertical pump impeller axis and being of the type includinga suction port (2a) of the pump being submersed in a cylindrical casing (3) having an open top and the cylinder diameter and being coaxial to a pump impeller axis anda liquid inlet line (4) tangentially entering the casing and oriented in the direction of the impeller rotation,the improvement wherein:an inlet line lower portion of the liquid inlet line (4) comprises a horizontal spiral, having a generating center inside the casing to produce swirling flow inside the casing (3), so that inlet flow is concentrated and a liquid level thereof is dynamically forced into an at least approximately vertical level.