Abstract
An experimental investigation into the operation of stepped thrust-bearings has been carried out using an experimental machine and measuring equipment specially designed for the purpose, but adaptable to other types of thrust bearing. The running oil-thickness and friction characteristics have been determined for a range of speeds, loads, and inlet temperature for several different angular positions of the radial step and for two curved steps. Results are given in the usual manner using ZN/P and also in non-dimensional form and are compared with theoretical predictions based on constant viscosity.
The experimental results are compared with the corresponding results obtained on tests of a Michell bearing of identical size and they establish the stepped bearing as being superior to the Michell bearing so far as load capacity and friction are concerned.
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