CENTRIFUGAL PUMP Russian patent published in 2004 - IPC

FIELD: mechanical engineering; pumps.

SUBSTANCE: invention relates to centrifugal pumps designed for pumping nonhomogeneous liquids. Proposed pump has impeller with blades. Impeller is installed for rotation in tap. Said tap has peripheral and end face walls and it is provided with projecting member. Front cover with suction branch pipe is secured on end face wall of tap. Tap is provided also with outlet branch pipe connecting pump with delivery pipeline. Peripheral wall of tap in normal cross section has form of quadratic curve described by equation (х² + у²)² + 2с² (х² - у²) = а⁴ - с⁴, а ≤ 0,5 в, 0 ≤ с ≤ а/ where a and c are some constants; в is width of tap. Numerical values of a and c are taken according to character of handled mixtures (density, abrasivity, size and form of grains of hard fraction, etc). Such form of peripheral wall of tap makes it possible to create such direction of flow at which action of flow onto walls of tap and outlet neck is not destructive.

EFFECT: increased service life of pump housing.

4 dwg