FIELD: engines and pumps.
SUBSTANCE: centrifugal pump (1) may pump fluid with high volume flow rates of above 20 m3/s. A pump comprises an impeller (3), installed as capable of rotation around the axis and directing fluid towards a concrete spiral chamber (4), located around the impeller (3). The pump (1) additionally comprises fixed elements (6) in the form of ribs located between the impeller (3) and the spiral chamber (4). Elements (6) form an interrupted barrier around the impeller (3). For each fixed element (6) the difference between the radial distance from the axis of rotation of the impeller (3) to the nearest end of the fixed element (6) at this axis and the radial distance from the axis of rotation of the impeller (3) to its periphery makes from 1 to 10% of the radial distance.
EFFECT: invention makes it possible to simply and effectively reduce in a cost-effective manner uneven radial loads at an impeller, developed by water, limiting at the same time water flow rate.
17 cl, 2 dwg
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