The rheology of lubricating oils is studied in connection with their chemico-physical instability, e.g. in hot rolling processes. The main theories of viscosity and the mechanism of operation of the capillary viscosimeter are outlined. Apparatus is then reported for viscosity determination at temperatures up to over 150degC. The interchangeable capillary compares adhesion to various metals and is flanked by two tanks suppressing the oil inlet and outlet velocities. Valves eliminate air bubbles and clean the circulating oil. A heat exchanger with an oil feed pump brings the oil to the specified test temperature.
Proposal for a system to measure the viscosity of lubricating oils at high temperatures. Theoretical and experimental analyses / Niola, Vincenzo. - In: OLEODINAMICA PNEUMATICA LUBRIFICAZIONE. - ISSN 0391-8645. - 31:3(1990), pp. 81-85.
Proposal for a system to measure the viscosity of lubricating oils at high temperatures. Theoretical and experimental analyses.
NIOLA, VINCENZO
1990
Abstract
The rheology of lubricating oils is studied in connection with their chemico-physical instability, e.g. in hot rolling processes. The main theories of viscosity and the mechanism of operation of the capillary viscosimeter are outlined. Apparatus is then reported for viscosity determination at temperatures up to over 150degC. The interchangeable capillary compares adhesion to various metals and is flanked by two tanks suppressing the oil inlet and outlet velocities. Valves eliminate air bubbles and clean the circulating oil. A heat exchanger with an oil feed pump brings the oil to the specified test temperature.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
