Cryogenic refrigerator and rotary joint
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United States of America Patent
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Oct 17, 2017
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app pub date -
Feb 16, 2016
filing date -
Feb 27, 2015
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Abstract
A cryogenic refrigerator includes a compressor for installation on a stationary component, an expander for installation on a rotating component, and a rotary joint fluidly coupling the compressor with the expander. The rotary joint includes: a rotor fixed to the rotating component and coaxial with its rotational axis; a stator disposed adjacent to the rotor to form a clearance between the rotor and the stator, and fixed to the stationary component; a first high-pressure flowpath and a second high-pressure flowpath, extending between the rotor and stator through the clearance, and a working-gas sealing area dividing the clearance into a first high-pressure section communicating with the first high-pressure flowpath, and into a second high-pressure section communicating with the second high-pressure flowpath.
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