HORIZONTAL MULTISTAGE CENTRIFUGAL PUMP Russian patent published in 1999 - IPC

FIELD: hydraulic machinery construction. SUBSTANCE: pump has casing, guiding devices, shaft with rotors mounted between guiding devices, convex closures, sealing members, end sealing unit and discharge device. Thrust rings are disposed between casing, guiding devices and closures. Convex surfaces of closures are faced inward of casing. Center of sphere defining outer wall of closure is offset into pump casing relative to center of sphere defining its inner wall. U-shaped collar is used as sealing member and positioned between casing, closure and thrust ring, with open side being oriented into casing. Such construction allows weight of closures to be reduced and share of loading, i.e. pressure of pumped medium received by fastenings, to be reduced. EFFECT: increased efficiency and enhanced reliability in operation. 1 dwg