Multi-stage ring type centrifugal pumps with inducer means

• Main Author: BUDRIS; ALLAN R
• Format: Patent
• Language: English
• Published: 27.06.1978
• Subjects: BLASTING; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HEATING; LIGHTING; MECHANICAL ENGINEERING; NON-POSITIVE DISPLACEMENT PUMPS; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ARTCOLLECTIONS [XRACs] AND DIGESTS; WEAPONS

Multi-Stage ring type centrifugal pumps for pumping fluids are adapted to receive an inducer shaped and sized generally but not necessarily to replace the impeller and diffuser of the first pumping stage of the given centrifugal pump. The preferred type of inducer for this use has an enlarged inlet diameter, at least two inducer vanes; an outlet diameter less than the inlet diameter to provide generally convergent flow passages, and the selected inlet vane angle for the inducer vanes will provide a positive incidence angle to increase the pressure at the suction inlet of the associated stage impeller into which the fluid being pumped is delivered.