Superconducting meissner effect bearings for cryogenic turbomachines. Final report, 1 January 1991-30 March 1993

Technical Report · Thu May 18 04:00:00 EDT 1989

OSTI ID:6388362

Valenzuela, J; Martin, J

This report describes the second year efforts to develop a Meissner bearing system for miniature cryogenic turboexpanders used in Brayton cycle cryocoolers. During this period, a permanent magnet/Meissner effect bearing was tested, and a system was developed for measuring the stiffness and damping of superconductor/magnet pairs at high frequencies and low amplitudes (I kHz, <100 um). Preliminary measurements have shown the feasibility of Meissner effect bearing/damper systems for small turbomachines. A new configuration for the bearing system has been conceptualized, and a patent disclosure prepared. The system provides both accurate positioning of the shaft at room temperature and stable rotation at cryogenic temperatures.... Meissner effect bearings.

• Research Organization: Creare, Inc., Hanover, NH (United States)
• OSTI ID: 6388362
• Report Number(s): AD-A-265692/4/XAB; CREARE-TM--1607; CNN: F49620-990-C-0007
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
425001 -- Engineering-- Power Cycles-- Brayton-- (1980-)
665412* -- Superconducting Devices-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
AMBIENT TEMPERATURE
BEARINGS
BRAYTON CYCLE
CRYOGENICS
DOCUMENT TYPES
ELECTRICAL EQUIPMENT
ELECTROMAGNETS
EQUIPMENT
FEASIBILITY STUDIES
MACHINERY
MAGNETS
MEISSNER-OCHSENFELD EFFECT
PATENTS
PERMANENT MAGNETS
SUPERCONDUCTING DEVICES
SUPERCONDUCTING MAGNETS
THERMODYNAMIC CYCLES
TURBOMACHINERY