Accession Number:

ADA265692

Title:

Superconducting Meissner Effect Bearings for Cryogenic Turbomachines

Descriptive Note:

Final rept. 1 Jan 91-30 Mar 93,

Corporate Author:

CREARE INC HANOVER NH

Personal Author(s):

Report Date:

1993-05-01

Pagination or Media Count:

18.0

Abstract:

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 magnetMeissner effect bearing was tested, and a system was developed for measuring the stiffness and damping of superconductormagnet pairs at high frequencies and low amplitudes I kHz, 100 um. Preliminary measurements have shown the feasibility of Meissner effect bearingdamper 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.

Subject Categories:

  • Hydraulic and Pneumatic Equipment
  • Machinery and Tools

Distribution Statement:

APPROVED FOR PUBLIC RELEASE