Experimental Investigation of Porous Bronze Bearings

Abstract

An experimental study was made of the performance of porous bronze bearings under different operating conditions. A PV value of 50,000 psi ft/min was found to be too high for the assembly used when the bearings were lubricated only by the oil initially provided within their structure. Tests at a PV value of 33,000 psi ft/min gave satisfactory results. The coefficient of friction was found to vary with load and to be almost independent of speed for the bearings tested under boundary lubrication conditions. Except for relatively light loads and moderate and higher speeds, the bearings operate under boundary lubrication conditions. When pressurized oil was supplied to the bearings, it was found that, for the same operating conditions, porous bearings run at higher eccentricity ratios than solid bearings, as predicted by theoretical analyses.

A parametric study of a porous self-circulating hydrodynamic bearing

“…Rhodes and Rouleau [20] presented the results for a short porous bearing with end seals and determined the decrease in the load carrying capability factor accounting for the effect of the short bearing assumption, when compared to the bearings of finite dimensions (1oL/D o5). Cusano and Phelan [21] presented experimental results confirming the porous bearings functionality at high eccentricity ratios (0.97 oe/c o1) and correlated the effects of permeability with the load carrying capability, when compared to solid bushing bearings.…”

Influence of Percolation effect of additives on the Performance of Conical Textured Porous Hybrid Journal Bearing

“…The current model has been modified for porous journal bearing taking into account similar geometric and operational parameters as provided in reference study. The comparison between the experimental results of Cusano et al 71 and the current model is depicted in Figure 4(b). From Figure 4(b), it is noticed that computed results are in quite agreeable to the results of Cusano et al 71 and a maximum deviation of 5.8% is seen between two results.…”

“…In order to authenticate the developed numerical model, it has been verified with the available theoretical as well as experimental published results from the open literature. 57,63,71,72 The verification has been performed in four different stages.…”

Discussion: “On the Transmissibility of Short Porous Journal Bearings” (Cusano, C., and Conry, T. F., 1978, ASME J. Lubr. Technol., 100, pp. 296–302)

“…This assumption was made for the purpose of being consistent with the similar assumption made for the oil film where the Reynolds equation used was based on the short bearing approximation. Representative valves for the permeability of porous bearings are given by Cameron, Morgan and Stainsby [22] 4 and Cusano and Phelan [23]. These limited data suggest that a reasonable range for the permeability of porous bearings is 2.43 X 10"" 14 m 2 (3.8 X 10~u in 2 ) to 39 X lO^1 4 m 2 (6 X 10~1 0 in 2 ).…”