Assessment of Lubrication Conditions in a Big-End Bearing by Temperature Measurements-Correlation with High Shear Viscosity

Experimental measurement of big-end bearing journal orbits

“…An improvement on this method would be to incorporate transducer temperature measurements within the experimental procedure. If the procedure were to be so developed, it would be important that these measurements are made precisely at the transducer locations rather than at nearby locations around the bearing surface as it is known that the surface temperature in connecting-rod bearings can vary significantly around the bearing circumference [9]. The present authors recommend that further work is necessary to identify a suitable way of monitoring localized surface temperatures in order for further improvements in orbit measurement accuracy to be obtained.…”

“…Although the lubricant temperature was recorded regularly throughout the testing, the displacement transducer temperature will not necessarily have been precisely the same as that of the oil. Previous work (see, for example, references [7] and [9]) suggested that, for the experimental conditions used, the temperature at the location of the displacement transducers may be higher than the lubricant temperature. In order to assess the sensitivity of the measured orbital trajectories to the transducer temperature the results were reprocessed assuming a transducer temperature 5 8C higher than the lubricant temperature; these results are presented in Fig.…”

Reciprocating machinery bearing analysis: Theory and practice

“…In the same year, du Parquet and Godet [42] published measurements of connecting rod big-end bearing temperature obtained using thermocouples, with their cables supported by a linkage mechanism similar to that used by Westbrook and Munro [40] (see Fig. 3b).…”