CENTRIFUGAL PUMP AIRTIGHT SEALING MODULE Russian patent published in 2019 - IPC F04D29/10 

FIELD: pumps building.

SUBSTANCE: invention relates to the field of pumps building, in particular to the centrifugal pumps movable mechanical seals. Airtight sealing module includes the flange housing (1), mounted on the shaft (2) two single mechanical seals (4, 5), installed inside filled with the neutral sealing liquid (6) airtight chamber, which walls are formed by the elastic diaphragm (3). By means of the clamps (14), by one end the diaphragm (3) is rigidly fixed to the slider bearing (10) housing (12), and by the other end is on the roller bearing support (11). Clamps (14) are evenly compressing the diaphragm (3) sealing collar. Structurally, the chamber (6) is located in the pump inlet or discharge line flow part.

EFFECT: invention is aimed at increase in the service life, increase in the movable connection sealing reliability without the need in its maintenance and the sealing and cooling liquids supply, as well as enabling the possibility of using of different in technical characteristics single mechanical seals as the module component, and the possibility of the module itself using in the pump both from the discharge side and from the suction side.

6 cl, 1 dwg