초록 ▼

A centrifugal pump comprises a hollow pump body. An impeller is rotatably installed in a pump chamber defined in the pump body. The impeller has a front side facing a major part of the pump chamber and a rear side facing a bottom wall of the pump chamber. The hollow pump body has both a water discha

A centrifugal pump comprises a hollow pump body. An impeller is rotatably installed in a pump chamber defined in the pump body. The impeller has a front side facing a major part of the pump chamber and a rear side facing a bottom wall of the pump chamber. The hollow pump body has both a water discharge passage and a water discharge port formed therein. A water guide ridge is positioned between the pump chamber and the water discharge passage to smooth a water flow from the pump chamber toward the water discharge port. The water guide ridge extends upstream in the water discharge passage and projects from the inner wall toward the major part of the pump chamber. The water guide ridge has an upstream end portion sloped. With this sloped upstream end portion, undesired cavitation in the pump is suppressed or at least minimized.

대표청구항 ▼

[ What is claimed is:] [1.] A centrifugal fluid pump comprising:a hollow pump body having a pump chamber at least partially defined therein;an impeller rotatably installed in said pump chamber, the impeller having a plurality of vanes formed on a front side and a rear side facing a bottom wall of sa

[ What is claimed is:] [1.] A centrifugal fluid pump comprising:a hollow pump body having a pump chamber at least partially defined therein;an impeller rotatably installed in said pump chamber, the impeller having a plurality of vanes formed on a front side and a rear side facing a bottom wall of said pump chamber;a fluid discharge passage and a fluid discharge port being positioned in said hollow pump body downstream of said pump chamber; anda fluid guide ridge being positioned between said pump chamber and said fluid discharge passage to smooth fluid flow from said pump chamber toward said fluid discharge port, said fluid guide ridge rising and extending upstream from said bottom wall across said pump body,wherein said water guide ridge has an upstream end portion profile changing such that the ridge's height increases downstream.