Molten metal rotor with hardened tip
First Claim
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1. A rotor for use in a molten metal pump, the rotor including:
- a graphite body, a top surface, and a plurality of vanes, wherein each of the plurality of vanes has a leading face and a trailing face, and hardened portions comprising hardened material at least twice as hard as the graphite body, the hardened portions comprising;
the top surface, less than all of the leading face and less than all of the trailing face;
wherein each of the plurality of vanes further comprises a recess, each recess being configured to enlarge an opening between each vane of the plurality of vanes so as to allow more molten metal to pass through the opening, and at least part of each recess is comprised of the hardened material;
wherein the graphite body has gaps at a corner of each blade and the hardened top surface has sections that are received by and mate with the gaps.
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Abstract
Embodiments of the invention are directed to a rotor for a molten metal pump and a molten metal pump including the rotor. The rotor has a main body and a top comprised of a material that is at least twice as hard as the main body. The top, among other things, may form a first portion of each rotor blade wherein the first portion directs molten metal into a pump chamber or other structure in which the rotor is mounted.
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Citations
25 Claims
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1. A rotor for use in a molten metal pump, the rotor including:
- a graphite body, a top surface, and a plurality of vanes, wherein each of the plurality of vanes has a leading face and a trailing face, and hardened portions comprising hardened material at least twice as hard as the graphite body, the hardened portions comprising;
the top surface, less than all of the leading face and less than all of the trailing face;wherein each of the plurality of vanes further comprises a recess, each recess being configured to enlarge an opening between each vane of the plurality of vanes so as to allow more molten metal to pass through the opening, and at least part of each recess is comprised of the hardened material; wherein the graphite body has gaps at a corner of each blade and the hardened top surface has sections that are received by and mate with the gaps. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
- a graphite body, a top surface, and a plurality of vanes, wherein each of the plurality of vanes has a leading face and a trailing face, and hardened portions comprising hardened material at least twice as hard as the graphite body, the hardened portions comprising;
Specification