MULTI-STAGE IMPELLER FOR MOLTEN METAL

• US 20170167793A1
• Filed: 02/13/2017
• Published: 06/15/2017
• Est. Priority Date: 06/21/2007
• Status: Active Grant

• Current Assignee: Molten Metal Equipment Innovations Incorporated (Molten)
• Original Assignee: Molten Metal Equipment Innovations Incorporated (Molten)
• Inventors: Cooper, Paul V., Fontana, Vincent D.
• Granted Patent: US 10,195,664 B2
• Time in Patent Office: Days
• CPC Class Codes: B22D 37/00 Controlling or regulating the pouring of molten metal from a casting melt-holding vessel B22D11/18, B22D39/00, B22D41/00 take precedence
• CPC Class Codes: B22D 39/00 Equipment for supplying molten metal in rations
• CPC Class Codes: B22D 41/00 Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like B22D39/00, B22D43/00 take precedence
• CPC Class Codes: B22D 41/02 Linings
• CPC Class Codes: B22D 7/00 Casting ingots, e.g. from ferrous metalsequipment for conveying molten metal B22D35/00
• CPC Class Codes: C22B 21/0084 melting and handling molten aluminium C22B21/02, C22B21/04 and C22B21/06 take precedence
• CPC Class Codes: C22B 21/064 using inert or reactive gases C22B21/066 and C22B21/068 take precedence
• CPC Class Codes: F27D 27/005 Pumps
• CPC Class Codes: F27D 3/14 Charging or discharging liquid or molten material
• CPC Class Codes: Y10T 29/49 Method of mechanical manufacture

Abstract

Aspects of the invention relate to systems and devices for transferring molten metal. A powered device, such as a molten metal pump, which may be inside of a transfer chamber, includes a multi-stage rotor to move molten metal within a vessel. The molten metal may be moved out of the vessel and into another structure, which could be another vessel or a launder.

Claims

1. A rotor with blades for directing molten metal towards the rotor interior and away from the rotor interior, the rotor comprising one or more rotor blades, wherein each rotor blade comprises:

(a) a first portion having a first surface angled to direct molten metal towards the rotor interior;

(b) a second portion separate from, juxtaposed to, and at least partially closer to the rotor interior than the first portion, and having a second surface angled to direct molten metal towards the rotor interior; and

(c) a third portion separate from, and juxtaposed to the second portion, and having a third surface for directing molten metal outward from the rotor interior.

2. The rotor of claim 1 that further includes a connective portion for connecting to a rotor shaft.

3. The rotor of claim 2 wherein the connective portion includes a threaded bore.

4. The rotor of claim 1 wherein the first surface has an angle of between 15°

and 45°

.

5. The rotor of claim 1 wherein the second surface has an angle of between 45°

and 70°

.

6. The rotor of claim 1 wherein the first surface has an angle of between 10°

and 45°

.

7. The rotor of claim 1 wherein the second surface has an angle of between 10°

and 60°

.

8. The rotor of claim 1 wherein the angle of the first surface is +/−

10°

of the angle of the second surface.

9. The rotor of claim 1 that has three, equally-radially-spaced blades.

10. The rotor of claim 1 that is comprised of graphite.

11. The rotor of claim 1 wherein each blade further includes a top surface and a recess, the recess extending downward from the top surface at an angle greater than 90°

and less than 180°

from a vertical axis.

12. The rotor of claim 11 wherein each blade has a top surface and a ledge extending between the upper surface and the recess.

13. The rotor of claim 1 wherein the second surface also directs molten metal outward from the rotor interior.

14. The rotor of claim 1 wherein the first potion is an outwardly-projecting from the blade.

15. The rotor of claim 1 wherein the angle of the second surface is greater than the angle of the first surface.

16. The rotor of claim 1 wherein the angle of the second surface is greater than the angle of the first surface.