Measuring Surface Temperatures between Rolling Steel Cylinders Using Double-Layer Transducers

Abstract

The signals of the thin-film transducers previously used for the measurement of temperature distributions in elastohydrodynamic contacts have been influenced by the high pressures occurring. At pure rolling conditions when the temperature increase is small, the error caused by pressure reaches nearly the order of magnitude of the temperature signal to be recorded. Using double-layer transducers of a novel type, a reduction of this error of over 90 per cent can be achieved. In this paper temperature measurements at pure rolling conditions are described. It has been shown that a distinct temperature spike occurs at the constriction at the trailing edge of the elastohydrodynamic contact.