CENTRIFUGAL PUMP Russian patent published in 2018 - IPC F04D15/00 F04D29/58 

FIELD: motors and pumps.

SUBSTANCE: invention relates to pumping construction and can be used in centrifugal fuel pumps having systems that ensure the pump is switched off while cooling its elements. Centrifugal pump comprises a shaft mounted on the shaft, equipped with inlet and outlet locking devices and located in the working cavity of the pump associated with the pumping device. Pump seal assembly is mounted on the shaft and is located in an intermediate cavity of the pump connected to the working cavity through a radial clearance, formed by the cylindrical hub of the impeller and the body, and through the end gap formed by the end non-working surface of the wheel and the body. Low-pressure cavity of the pump is located in front of the pumping pump connected to the pump inlet. Jet, which connects the inlet cavity of the pump with the intermediate cavity, is equipped with a jet. Pumping device is made in the form of an ejector, the nozzle of which is directly connected to the working cavity. Input of the ejector chamber is connected with the inlet cavity of the pump, and its output is with a low-pressure cavity.

EFFECT: invention is aimed at improving the reliability of the pump operation and life.

3 cl, 2 dwg