RU2002119697A - Non-clogging pump - Google Patents

Claims (2)

1. Non-clogging pump, comprising a housing with a niche, an impeller with vanes installed in it, an inlet pipe with a clearance relative to the impeller blades, characterized in that the impeller is fully located in the rear housing wall niche, the inlet pipe clearance relative to the impeller vanes Δ = b ₂ , the niche is made in the form of a body of revolution based on the union of a rectangle of width b ₁ , height h ₁ = d _1/2 , a rectangle of height h ₂ = (d ₂ -2h ₁ ) / 2, width b ₃ = b ₁ -r ₁ and a semicircle of radius r ₁ = Δ / 4 about an axis coincident with the axis of rotation of the worker of the wheels, wherein the relative inner diameter niche

relative outer diameter of the niche

relative width of the body

for b ₂ ≥ s, relative niche depth

the housing is additionally equipped with a discharge pipe connected to its upper point, the impeller is additionally equipped with a rear disc and peripheral shortened blades, where d ₁ is the inner diameter of the niche; d ₂ is the outer diameter of the niche; D is the outer diameter of the wheel; b ₁ - the depth of the niche; b ₂ is the width of the housing; s is the maximum size of solids contained in the pumped medium. 2. Non-clogging pump, according to claim 1, characterized in that the length of the peripheral shortened blades l ₁ = 0.2 D and they are placed between the blades at a distance l ₂ = 0.3 D from the center of the impeller, the angle of inclination of the peripheral rib shortened blades β = 60 °.