FIELD: engine devices and pumps.
SUBSTANCE: pump working wheel comprises a hub (34) with at least one integral and rigid working blade (38) and at least one integral and rigid rear blade (40). At least one working blade (38) has a front edge area (48) provided with a rounded or thickened portion, a rear edge area (50), a central area, a side edge, a pressure surface (44) and a suction surface (46). At least one integral and rigid rear blade (40) has a rear edge area, a side edge, a pressure surface and a suction surface. The rear edge area (50) with at least one working blade (38) is rounded by rounding thereof to have a thickness greater than the thickness in the central area (C).
EFFECT: elimination of fibres adhesion to blade edges.
13 cl, 6 dwg
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