Multi-stage impeller for molten metal

Patent metadata

Field	Value
Publication number	US-10195664-B2
Application number	US-201715431596-A
Country	US
Kind code	B2
Filing date	Feb 13, 2017
Priority date	Jun 21, 2007
Publication date	Feb 5, 2019
Grant date	Feb 5, 2019

Abstract

Aspects of the invention relate to a rotor 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. The multi-stage rotor may have multiple blades with each blade having multiple surfaces.

First claim

What is claimed is:

1. A rotor with blades for directing molten metal towards a 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 surface has an angle, the second surface has an angle, and the angle of the second surface is greater than the angle of the first surface.

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

Assignees

• Molten Metal Equipment Innovations Llc

Inventors

• Cooper Paul V
• Fontana Vincent D

Classifications

• C22B21/0084

  melting and handling molten aluminium (C22B21/02, C22B21/04 and C22B21/06 take precedence) · CPC title

• B22D7/00

  Casting ingots, {e.g. from ferrous metals}(equipment for conveying molten metal B22D35/00) · CPC title

• B22D37/00

  Controlling or regulating the pouring of molten metal from a casting melt-holding vessel ({B22D11/18,} B22D39/00, B22D41/00 take precedence) · CPC title

• B22D41/02 Primary

  Linings · CPC title

• F27D3/14

  Charging or discharging liquid or molten material · CPC title