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Title: Pump for molten metal or other fluid

A pump having no moving parts which can be used to pump high temperature molten metal or other fluids in a vacuum or low pressure environment, and a method for pumping such fluids. The pump combines elements of a bubble pump with a trap which isolates the vacuum or low pressure region from the gas used to create the bubbles. When used in a vacuum the trap prevents the pumping gas from escaping into the isolated region and thereby reducing the quality of the vacuum. The pump includes a channel in which a pumping gas is forced under pressure into a cavity where bubbles are formed. The cavity is in contact with a reservoir which contains the molten metal or other fluid which is to be pumped. The bubbles rise up into a column (or pump tube) carrying the fluid with them. At the top of the column is located a deflector which causes the bubbles to burst and the drops of pumped fluid to fall into a trap. The fluid accumulates in the trap, eventually forcing its way to an outlet. A roughing pump can be used to withdraw the pumping gas from the top of the column andmore » assist with maintaining the vacuum or low pressure environment.« less
 [1];  [1]
  1. (Livermore, CA)
Issue Date:
OSTI Identifier:
United States of America as represented by United States (Washington, DC) LLNL
Patent Number(s):
US 5312232
Contract Number:
Research Org:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Country of Publication:
United States
pump; molten; metal; fluid; moving; temperature; fluids; vacuum; pressure; environment; method; pumping; combines; elements; bubble; trap; isolates; region; gas; create; bubbles; prevents; escaping; isolated; reducing; quality; channel; forced; cavity; formed; contact; reservoir; contains; pumped; rise; column; tube; carrying; top; located; deflector; causes; burst; drops; fall; accumulates; eventually; forcing; outlet; roughing; withdraw; assist; maintaining; pumping gas; pressure environment; pressure region; molten metal; temperature molten; /417/