POMPA MULTISTADIO DI TIPO SOMMERSO, PROVVISTA DI ELEMENTI INTERNI MODULARI IN MATERIALI ANTIUSURA

• Main Authors: JANIGRO ALDO, VALSECCHI MAURIZIO, DE BASTIANI FIORENZO
• Format: Patent
• Language: Italian
• Published: 16.06.1994
• Edition: 5
• Subjects: BLASTING; HEATING; LIGHTING; MECHANICAL ENGINEERING; NON-POSITIVE DISPLACEMENT PUMPS; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENTMACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENTPUMPS; WEAPONS

A multistage pump of the type including a jacket (1), a shaft (2) which is coaxial to the jacket and connected to an electric motor, and active pumping stages rigidly coupled to the shaft; each stage is formed by an impeller (5) with a front ring and by a distribution element (6) facing the ring with the interposition of an annular supporting element (7) shaped like an inverted bowl; the radial-vane impellers and their distribution elements are rigidly coupled to the jacket made of a highly wearproof material, and the impellers are mounted on the shaft and can move axially or float with a preset stroke with respect to the associated bowl-shaped element, whereas at least one annular supporting and sealing element (8) for the impeller is interposed between the front ring of each impeller and the associated bowl-shaped element, is made of a material which is more wearproof than the impellers, and is suitable to withstand the axial thrusts of the various stages and prevent any fluid seepage during pump operation.