FIELD: engine devices and pumps.
SUBSTANCE: working wheel comprises at least a hub (52) extending radially outside in the form of a disc (54), at least one working blade (56) located on front surface of the hub (52) and the disc (54), at least one rear blade (60) on the disc rear surface (54) and at least one balancing channel (58) extending through the hub (52) and the disc (54). A first opening (64) of the balancing channel (58) in a first surface of the wheel hub (52) is located closer to an axis (8) than a second opening (66) and within a circle formed by radially innermost portion (56e) of the blades (56) during wheel rotation (50) about the axis (8). The second opening (66) of at least one channel (58) is located on the smallest disc diameter (54).
EFFECT: increase of efficiency and possibility for using without risk of shaft seal damage at power higher than that of optimal working mode.
14 cl, 7 dwg
