Power Losses of Oil-Jet Lubricated Ball Bearings With Limited Applied Load: Part 2—Experiments and Model Validation

Abstract

This paper presents an experimental study on load independent power losses in oil jet lubricated deep groove ball bearings. These experiments were performed under different operating conditions. Rotational speed, lubricant temperature, oil flow rate and rolling element bearings dimensions were varied to quantify their influence on power losses. A load-independent power losses model for rolling element bearings has been proposed in a companion paper (Darul et al., 2023, "Power Losses of Oil-Jet Ball Bearings with Limited Applied Load: Part 1 -Theoretical Analysis") and was used here to simulate experiments. Model results and measurements are compared. A good agreement is found on the power losses in low loaded deep groove ball bearings.

Power Loss Analysis of an Oil-Jet Lubricated Angular Contact Ball Bearing: Theoretical and Experimental Investigations

“…On the other hand, it has been shown by Darul et al [6] that unloaded BB in DGBB must also be considered in the IVR regime to accurately predict REB power losses. This study also showed that, for moderate speeds (N•dm product less than 10 6 ) and low applied loads (Fr < 5% C 0 ), most of the power losses are due to hydrodynamic rolling [21]. This study was carried out on radially loaded DGBB.…”

“…The objective is to estimate the power dissipation of the support block as a function of speed, loads and outer ring temperatures. As explained in [21], a calibration block is used instead of the measurement one. This block has two lip seals and two oil-bath lubricated REBs which are identical to the ones used in the support blocks (DGBB).…”

“…In this field, two global models are generally found: Harris-Palmgren [18,19] and SKF [20] models. Previous studies have shown that experimental recalibration is necessary for accurate prediction [21][22][23]. Therefore, this approach is not considered in the present study.…”