OVERFLOW VORTEX TRANSFER SYSTEM
First Claim
1. A molten metal pump comprising an elongated tube having a base end and a top end, a shaft disposed within said tube and an impeller rotatable by said shaft, said impeller disposed proximate said base end, said tube having a diameter at least 1.1 times a diameter of the impeller, said base end including an inlet and said top end including an outlet.
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Abstract
The present invention is directed to a molten metal pump comprising an elongated pumping chamber tube with a base end and an open top end. A shaft extends into the tube and rotates an impeller therein, the impeller rotates proximate the base end. The tube has a diameter at least 1.1 times the diameter of the impeller. The pumping chamber tube preferably has a length at least three times the height of the impeller. The base end includes an inlet and the top end includes a tangential outlet. Rotation of the impeller draws molten metal into the pumping chamber and creates a rotating equilibrium vortex that rises up the walls of the pumping chamber. The rotating vortex adjacent the top end exists the device cia the tangential outlet.
57 Citations
22 Claims
- 1. A molten metal pump comprising an elongated tube having a base end and a top end, a shaft disposed within said tube and an impeller rotatable by said shaft, said impeller disposed proximate said base end, said tube having a diameter at least 1.1 times a diameter of the impeller, said base end including an inlet and said top end including an outlet.
- 16. A molten metal pump comprised of an elongated refractory body, said refractory body having an inlet region having an inlet diameter, a vortex region having a vortex region diameter, and an outlet region having an outlet region diameter, wherein said outlet region diameter is greater than said vortex region diameter, and said vortex region diameter is greater than said inlet region diameter, an impeller disposed in or adjacent said inlet, a shaft extending through said vortex region and said outlet region and including a first end engaging the impeller and a second end adapted to engage a motor.
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19. (canceled)
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21. (canceled)
Specification