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Rotor bearing system for molten metal pumps

  • US 5,951,243 A
  • Filed: 07/03/1997
  • Issued: 09/14/1999
  • Est. Priority Date: 07/03/1997
  • Status: Expired due to Term
First Claim
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1. A molten metal pump comprising;

  • a. a superstructure;

    b. a pump base formed of refractory material, the base having a pump chamber including a first bearing surface;

    c. a support post connecting the restructure to the pump base;

    d. a rotor positioned in said pump chamber, said rotor having a top, a bottom and a side and including a plurality of recesses; and

    e. a bearing section rigidly positioned in at least two of the recesses in said rotor, each of said bearing sections having an outer surface, said collective outer surfaces forming a second bearing surface on the side of the rotor, the second bearing surface being axially aligned with said first bearing surface, wherein the second bearing surface is positioned inside of the first bearing surface to reduce cross-axial movement of the rotor, and wherein the bearing sections do not create a fluid-tight seal with the first bearing surface.

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