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Title: Foil Bearing Coating Behavior in CO 2

Abstract

The Sandia S-CO 2 Recompression Closed Brayton Cycle (RCBC) utilizes a series of gas foil bearings in its turbine-alternator-compressors. At high shaft rotational speed these bearings allow the shaft to ride on a cushion of air. Conversely, during startup and shutdown, the shaft rides along the foil bearing surface. Low-friction coatings are used on bearing surfaces in order to facilitate rotation during these periods. An experimental program was initiated to elucidate the behavior of coated bearing foils in the harsh environments of this system. A test configuration was developed enabling long duration exposure tests, followed by a range of analyses relevant to their performance in a bearing. This report provides a detailed overview of this work. The results contained herein provide valuable information in selecting appropriate coatings for more advanced future bearing-rig tests at the newly established test facility in Sandia-NM.

Authors:
 [1];  [1];  [2];  [2]
  1. Sandia National Lab. (SNL-CA), Livermore, CA (United States)
  2. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE Office of Nuclear Energy (NE), Nuclear Reactor Technologies (NE-7)
OSTI Identifier:
1374696
Report Number(s):
SAND-2017-8280R
655946
DOE Contract Number:
AC04-94AL85000
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Walker, Matthew, Kruizenga, Alan Michael, Pasch, James Jay, and Fleming, Darryn. Foil Bearing Coating Behavior in CO2. United States: N. p., 2017. Web. doi:10.2172/1374696.
Walker, Matthew, Kruizenga, Alan Michael, Pasch, James Jay, & Fleming, Darryn. Foil Bearing Coating Behavior in CO2. United States. doi:10.2172/1374696.
Walker, Matthew, Kruizenga, Alan Michael, Pasch, James Jay, and Fleming, Darryn. 2017. "Foil Bearing Coating Behavior in CO2". United States. doi:10.2172/1374696. https://www.osti.gov/servlets/purl/1374696.
@article{osti_1374696,
title = {Foil Bearing Coating Behavior in CO2},
author = {Walker, Matthew and Kruizenga, Alan Michael and Pasch, James Jay and Fleming, Darryn},
abstractNote = {The Sandia S-CO2 Recompression Closed Brayton Cycle (RCBC) utilizes a series of gas foil bearings in its turbine-alternator-compressors. At high shaft rotational speed these bearings allow the shaft to ride on a cushion of air. Conversely, during startup and shutdown, the shaft rides along the foil bearing surface. Low-friction coatings are used on bearing surfaces in order to facilitate rotation during these periods. An experimental program was initiated to elucidate the behavior of coated bearing foils in the harsh environments of this system. A test configuration was developed enabling long duration exposure tests, followed by a range of analyses relevant to their performance in a bearing. This report provides a detailed overview of this work. The results contained herein provide valuable information in selecting appropriate coatings for more advanced future bearing-rig tests at the newly established test facility in Sandia-NM.},
doi = {10.2172/1374696},
journal = {},
number = ,
volume = ,
place = {United States},
year = 2017,
month = 8
}

Technical Report:

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