CENTRIFUGAL PUMP Russian patent published in 2016 - IPC F04D29/44 F04D29/66 

FIELD: rocket construction.

SUBSTANCE: invention relates to rocket engine building and can be used in turbo-pump assemblies (TPA) of liquid-propellant engine of upper stages of rockets as multiple-shot boosters and with long operating time. Centrifugal pump comprises housing (1) of the pump, centrifugal impeller (2), diffuser channel (3) with tongue (4) of the diffuser, bearing support (5). On the periphery of the spiral single-turn channel there are additional cavities (6), (7), bypass holes (8) and bypass pipeline (9). While operating liquid from pump cavity (6) through holes (8) is dropped through pipeline (9) into cavity (7), that provides uniform pressure plot under impeller (2). This eliminates "occurrence" of radial force acting on bearing support 5.

EFFECT: invention is aimed at improvement of serviceability of the bearing support of the TPA while long-term operating at various operating rotation conditions, that is achieved by considerable reduction of radial force, acting on the impeller and, consequently, on the bearing support.

1 cl, 3 dwg