CENTRIFUGAL PUMP AND METHOD FOR ADJUSTING DISTANCE OF WEAR-RESISTANT PLATE FROM IMPELLER OF CENTRIFUGAL PUMP Russian patent published in 2021 - IPC F04D7/04 

FIELD: pumps.

SUBSTANCE: invention relates to a centrifugal pump (1) for lifting clean water or water with suspended particles, comprising a hollow body (2) defining a central axis (L) and having a front hole (3) and a volute (4) with an inlet channel (5), an impeller (8) located in the body (2) configured to connect with the engine and having blades (9), wherein the upper edges (10) of the blades essentially lie in the same plane with the annular peripheral area (11). Also provided is a lid (12) for closing the front hole (3) comprised of a flange (13) with a central part (14) and a substantially radial peripheral part (16) of a substantially circular wear-resistant plate (19) rigidly connected to the flange (13) and located at a predetermined axial distance (d₁) from the annular peripheral area (11) of the impeller (8) and from the adjusting tools (24) for controlled adjustment of the axial distance (d₁) of the wear-resistant plate (19). The adjusting tools (24) are mounted on the flange (13) and can be accessed from the outside and are configured to calibrate the axial position of the wear-resistant plate (19) and to lock said plate in the calibrated position. Also described is a method of adjusting the axial distance (d₁) of a wear-resistant plate (19) from an impeller (8) in a centrifugal pump (1).

EFFECT: invention provides a simple and quick initial adjustment of the distance between a wear plate and an impeller, as well as technical maintenance.

14 cl, 11 dwg