FIELD: power industry.
SUBSTANCE: device comprises at least one rotatable bladeless impeller (1) comprising rigidly connected rear (2) and front (3) plates arranged coaxially with clearance. The front plate (3) has an inlet (5) for a fluid medium, while alternating annular projections (6) are made at the adjacent end surfaces of the front and rear plates (2, 3), forming a labyrinthine channel for fluid medium passage from the mentioned inlet (5) to the outlet formed by the mentioned clearance between the plates (2, 3). The labyrinthine channel has a constant passage area.
EFFECT: increased efficiency, productivity and performance index of pumping, uniformity and symmetry of device wear, reduced overall wear, radial beats, noise, axial loadings, cavitation level, enhanced capacities of different media pumping.
7 cl, 3 dwg
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