Measurements of torque and heat transfer across mechanical-contact rotating flat interfaces
Abstract
Measurements of heat transfer and torque characteristics between two rotating flat interfaces held under pressed contact were made in vacuum conditions for temperatures ranging from ambient to cryogenic (100 K). Experimental data of contact heat transfer film coefficient and dynamic coefficient of friction were obtained for rotating interfaces prepared with different surface treatments including molybdenum disulfide (MoS2), diamond-like (DIONDsm), and polycrystalline-diamond coatings with tungsten carbide substrate. The test data obtained showed that the best results were achieved with polycrystalline-diamond surface finish on copper-to-copper interface fins. Furthermore, the test measurements also indicated that the molybdenum disulfide and diamond-like DIONDsm coatings will not adhere to the anodized aluminum interface fin in the present application of rotation under pressure loading.
- Publication:
-
AIAA and ASME, 5th Joint Thermophysics and Heat Transfer Conference
- Pub Date:
- June 1990
- Bibcode:
- 1990jtht.confQ....W
- Keywords:
-
- Coefficient Of Friction;
- Cryogenic Equipment;
- Flat Surfaces;
- Heat Transfer Coefficients;
- Rolling Contact Loads;
- Solid-Solid Interfaces;
- Torque;
- Coatings;
- Contact Resistance;
- Molybdenum Disulfides;
- Rotating Shafts;
- Tungsten Carbides;
- Vacuum Chambers;
- Fluid Mechanics and Heat Transfer