TIGHT RADIAL-FLOW PUMP Russian patent published in 2010 - IPC F04D13/02 F04D29/41 

FIELD: engines and pumps.

SUBSTANCE: proposed pump comprises motor 1 with drive shaft 2, housing 3 accommodating impeller 4 driven by cylindrical magnetic coupling 5. Driven half-coupling 6 of coupling 5 is linked with drive shaft 2, while driven half-coupling 7 is linked with impeller 4. Coaxially mounted half-couplings 6, 7 are tightly separated by cylindrical nonmagnetic screen 8 fixed in housing 3 and represents multi- alternating pole devices. Support disk 10 of impeller 4 rests on fixed ring 9 of housing 3. Magnetic system of drive half-coupling 6 is displaced relative to magnetic system of driven half-coupling 7 in direction opposite pump intake by 0.5% to 10% of magnetic system length.

EFFECT: less scores on face support surfaces in transient operating conditions.

1 dwg