Advanced motor driven impeller pump for moving metal in a bath o

Details Advanced motor driven impeller pump for moving metal in a bath o Advanced motor driven impeller pump for moving metal in a bath o

1998-08-07

2000-06-06

Look, Edward K.

Rotary kinetic fluid motors or pumps

Working fluid passage or distributing means associated with...

With runner shaft of specific shape or material

415200, 4152131, 4152151, 4152171, 415178, F04D 706

Patent

active

060710748

ABSTRACT:
An apparatus for moving a stream of molten metal in a bath of molten metal having a pumping member, a pump housing, a power device, a connecting element to connect the power device to drive the pumping member in motion, and a shielding element rotatably mounted on the pump housing and drivingly connected to pumping member. The connecting element comprises a pumping shaft having an upper end connected to the power device, and a lower end drivingly connected to the shielding element to rotate the pumping member when the power device is actuated. The shaft and the shielding element have a first and a second coefficient of thermal expansion, respectively. The shaft is telescopically disposed in the shielding element out of contact with the molten metal and formed a chamber between the shaft and the shielding element sufficient to permit thermal expansion of the shaft without imposing a radial thermal stress on the shielding element. There is also a secondary connecting element that connects the shielding element to the shaft such that the shielding element and all its internal components rotate with the shaft as a single unit.

REFERENCES:
patent: 2948524 (1960-08-01), Sweeney et al.
patent: 3255702 (1966-06-01), Gehrm
patent: 3612715 (1971-10-01), Yedidiah
patent: 5165858 (1992-11-01), Gilbert et al.
patent: 5181828 (1993-01-01), Gilbert et al.
patent: 5330328 (1994-07-01), Cooper

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