A Report on the Main Valve Bearing Rebuild for the Advanced Turbine Aerothermal Research Rig (ATARR).
CALSPAN CORP BUFFALO NY
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On December 16, 1992 the main valve in the ATARR facility seized during a run at 50 psia and 400F. Immediately prior to this problem, a run at 90 psia and 400F was successfully completed. These two tests were the first ATARR runs at high temperature. The main valve had been run dozens of times prior to this at room temperature without incident. However, some wear of the soft nickel coating on the cylinder was observed before the high temperature runs. This section of the main valve final report documents the process of rebuilding the main valve and includes a description of an analyses conducted to determine the possible cause or causes of the failure. The bearing redesigned process, which was based on the analysis just noted, is detailed. The actual rebuild, final inspection and testing of the main valve are also included to complete this section.
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