Reduccin del Tamao del ndice en Bsquedas por Similitud sobre Espacios Mtricos

PCT No. PCT/FR95/01184 Sec. 371 Date Mar. 18, 1997 Sec. 102(e) Date Mar. 18, 1997 PCT Filed Sep. 14, 1995 PCT Pub. No. WO96/09476 PCT Pub. Date Mar. 28, 1996A centrifugal/axial flow pump includes both a spiral centrifugal impeller, and a tube leading to the centrifugal impeller with an internal spiral having a free diameter in the axial center. The internal spiral induces preliminary axial flow, providing a pre-whirl of a liquid before it reaches the centrifugal impeller at its inlet, and forces axial flow and "stuffs" or "crams" liquid into the inlet, increasing liquid pressure at the centrifugal impeller inlet. The centrifugal impeller and the axial flow spiral both induce flow. The tube may include an extension forming an electric motor shaft to provide a unitary motor pump in which the liquid to be pumped cools the tube and the motor rotor. The tube extends from the centrifugal impeller eye to the pump flange, where it is sealed, so as to improve pump tightness over the conventional centrifugal pump.