Experimental evidence of a two-axial groove hydrodynamic journal bearing under severe operation conditions

Abstract

In this study, an experimental investigation of the influence of the applied static load and rotational speed on the behaviour of a 160-mm diameter cylindrical journal bearing with two axial grooves was conducted. The rotational speed ranged from 66 rpm to 1440 rpm, and the applied static load varied from 0 kN to 350 kN in the vertical direction. The profiles of the pressure and the oil-film thickness during the shaft rotation have been measured by one proximity probe and one pressure probe installed in the rotating shaft. Measurements of the shaft centre position, dynamic coefficients, hydrodynamic pressure, temperature distributions on the bearing, film thickness, and bearing deformation under several operating conditions are presented and discussed

The Effect of the Pivot Stiffness on the Performances of Five-Pad Tilting Pad Bearings

“…The TEHD model of the TPJB is similar to that developed and described by the same authors in [36][37][38][39] and improved for the thermal aspect, as partially done in [40] for sleeve journal bearings. The model mainly includes the laws of hydrodynamic lubrication, the thermal model of the oil-films, pads and shaft and the flexibility of the pivots.…”

Tribo-design of lubricants for power loss reduction in the oil-film bearings of a process industry machine: Modelling and experimental tests

“…The bearings supporting the spindle have the shape shown in Fig. 3; each bearing is characterized by two axial grooves located in the unloaded part [7]. An additional groove in the circumferential direction is in the middle of the bearing and connects the two axial grooves.…”

“…An experimental activity was performed using a test rig equipped with a bearing having similar dimensions to those of the front bearings of the machine described in the paper [7]. Experimental tests were performed to evaluate the behaviour of the bearing and the reduction of the power loss for two different oils, the current one used in the real machine, and a new oil with lower viscosity, approximately half of the reference one.…”

“…Oil-film journal bearings are still widely employed in industry because of their simplicity and low cost in high-load or high-speed applications [1][2][3][4][5][6]. Typical applications in the process industry are represented by machines with medium/large diameter shafts, even operating at low Sommerfeld numbers [7], and characterized by both low tangential speeds and high loads. Conversely, other applications, such as in power generation or in the oil & gas fields, can be characterized by high speeds and low loads.…”

“…In this paper, the case of a steel roll forming machine equipped with several oil-film journal bearings [7][8][9] operating in different conditions is considered.…”