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  • MACHINERY  (3)
  • 1
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    Unknown
    Noncavitating Pump For Liquid Helium (1996)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Immersion pump features high efficiency in cryogenic service. Simple and reliable centrifugal pump transfers liquid helium with mass-transfer efficiency of 99 percent. Liquid helium drawn into pump by helical inducer, which pressurizes helium slightly to prevent cavitation when liquid enters impeller. Impeller then pressurizes liquid. Purpose of pump to transfer liquid helium from supply to receiver vessel, or to provide liquid helium flow for testing and experimentation.
    Keywords: MACHINERY
    Type: ARC-13229 , NASA Tech Briefs (ISSN 0145-319X); 20; 3; P. 84
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 2
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    Unknown
    Miniature Gas-Circulating Machine (1993)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: Proposed gas-circulating machine consists essentially of centrifugal pump driven by induction motor. Noncontact bearings suppress wear and contamination. Used to circulate helium (or possibly hydrogen or another gas) in regeneration sorption-compressor refrigeration system aboard spacecraft. Also proves useful in terrestrial applications in which long life, reliability, and low contamination essential.
    Keywords: MACHINERY
    Type: NPO-18486 , NASA Tech Briefs (ISSN 0145-319X); 17; 5; P. 88
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 3
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    Unknown
    Miniature Centrifugal Compressor (1989)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: Miniature turbocompressor designed for reliability and long life. Cryogenic system includes compressor, turboexpander, and heat exchanger provides 5 W of refrigeration at 70 K from 150 W input power. Design speed of machine 510,000 rpm. Compressor has gas-lubricated journal bearings and magnetic thrust bearing. When compressor runs no bearing contact and no wear.
    Keywords: MACHINERY
    Type: GSC-13093 , NASA Tech Briefs (ISSN 0145-319X); 13; 3; P. 78
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
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