SNAP 50/SPUR NUCLEAR MECHANICAL POWER UNIT EXPERIMENTAL RESEARCH AND DEVELOPMENT PROGRAM. PART II. BEARINGS.
Final rept. May 62-Dec 66,
GARRETT CORP PHOENIX AZ AIRESEARCH MFG DIV
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Various combinations of bearing and seal materials have been evaluated to determine compatibility, torque values, and wear rates. It has been shown in these tests that an alloy of tungsten-carbide is well suited to the environment and operating conditions of a potassium turbine. Fundamental heat-transfer data has verified boiling stability and the high heat-transfer coefficients associated with potassium. This has been demonstrated with full-scale multitube boiler modules on two separate occasions. Tests of bearings, seals and rotor systems have shown the pivoted-pad bearing system to be well suited to meet the wide range of operating conditions anticipated for the potassium turbogenerator. Sufficient design parameters are available to develop a potassium turbine for a space system. Data now exists to reasonably predict system performance, material selection, and component design to meet a wide range of power-system requirements.
- SNAP (Systems for Nuclear Auxiliary Power) Technology