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Title: Cryogenic expansion joint for large superconducting magnet structures

Abstract

An expansion joint is provided that accommodates dimensional changes occurring during the cooldown and warm-up of large cryogenic devices such as superconducting magnet coils. Flattened tubes containing a refrigerant such as gaseous nitrogen (N.sub.2) are inserted into expansion spaces in the structure. The gaseous N.sub.2 is circulated under pressure and aids in the cooldown process while providing its primary function of accommodating differential thermal contraction and expansion in the structure. After lower temperatures are reached and the greater part of the contraction has occured, the N.sub.2 liquefies then solidifies to provide a completely rigid structure at the cryogenic operating temperatures of the device.

Inventors:
 [1]
  1. Kingston, TN
Issue Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
OSTI Identifier:
862985
Patent Number(s):
4066496
Assignee:
United States of America as represented by United States Energy (Washington, DC)
Patent Classifications (CPCs):
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01F - MAGNETS
DOE Contract Number:  
W-7405-ENG-26
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
cryogenic; expansion; joint; superconducting; magnet; structures; provided; accommodates; dimensional; changes; occurring; cooldown; warm-up; devices; coils; flattened; tubes; containing; refrigerant; gaseous; nitrogen; inserted; spaces; structure; circulated; pressure; aids; process; providing; primary; function; accommodating; differential; thermal; contraction; temperatures; reached; occured; liquefies; solidifies; provide; completely; rigid; operating; device; magnet coils; differential thermal; superconducting magnet; operating temperature; operating temperatures; gaseous nitrogen; thermal contraction; tubes containing; accommodating differential; rigid structure; expansion joint; dimensional changes; changes occurring; magnet structure; dimensional change; cryogenic expansion; changes occur; tubes contain; magnet structures; /376/174/

Citation Formats

Brown, Robert L. Cryogenic expansion joint for large superconducting magnet structures. United States: N. p., 1978. Web.
Brown, Robert L. Cryogenic expansion joint for large superconducting magnet structures. United States.
Brown, Robert L. Sun . "Cryogenic expansion joint for large superconducting magnet structures". United States. https://www.osti.gov/servlets/purl/862985.
@article{osti_862985,
title = {Cryogenic expansion joint for large superconducting magnet structures},
author = {Brown, Robert L},
abstractNote = {An expansion joint is provided that accommodates dimensional changes occurring during the cooldown and warm-up of large cryogenic devices such as superconducting magnet coils. Flattened tubes containing a refrigerant such as gaseous nitrogen (N.sub.2) are inserted into expansion spaces in the structure. The gaseous N.sub.2 is circulated under pressure and aids in the cooldown process while providing its primary function of accommodating differential thermal contraction and expansion in the structure. After lower temperatures are reached and the greater part of the contraction has occured, the N.sub.2 liquefies then solidifies to provide a completely rigid structure at the cryogenic operating temperatures of the device.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1978},
month = {1}
}

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