Combined influence of geometric imperfections and misalignment of journal on the performance of four pocket hybrid journal bearing
TL;DR: In this article, the effect of misalignment of journal in conjunction with geometric imperfections of journal on the performance of four pocket hybrid journal bearing system has been investigated and the numerically simulated results indicate that the performance gets significantly deteriorated due to the geometric imperfection and mis alignment of journal.
About: This article is published in Tribology International.The article was published on 2016-05-01. It has received 25 citations till now. The article focuses on the topics: Reynolds equation & Bearing (mechanical).
Citations
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TL;DR: In this paper, the performance of a rotor system supported by externally pressurized air bearing was investigated and the effect of angular misalignment to the pressure distribution in the air bearing is obtained.
41 citations
TL;DR: In this article, the influence of journal misalignment on the static and dynamic performance of aerostatic journal bearings has been analyzed and an effective numerical approach was proposed to solve the unsteady Reynolds equation.
29 citations
TL;DR: This review offers a comprehensive summary of potential problems and possible solutions in the large-scale hydrostatic bearing design, and simultaneously serves as a supporting material to overcome potential obstacles that might emerge during manufacturing, assembly, and service.
21 citations
TL;DR: In this article, the effect of shape errors on the dynamic behavior of externally pressurized air journal bearings is studied and a semi-implicit numerical scheme is used in order to reduce the computing time.
19 citations
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TL;DR: In this paper, the performance of a 100 mm diameter plain journal bearing submitted to a misalignment torque was evaluated for rotational speeds ranging from 1500 to 4000 rpm with a maximum static load of 9000 N and a misaligned torque varying from 0 to 70 N.
Abstract: The present study deals with the experimental determination of the performance of a 100 mm diameter plain journal bearing submitted to a misalignment torque. Hydrodynamic pressure and temperature fields in the mid-plane of the bearing, temperatures in two axial directions, oil flow rate, and minimum film thickness, were all measured for various operating conditions and misalignment torques. Tests were carried out for rotational speeds ranging from 1500 to 4000 rpm with a maximum static load of 9000 N and a misalignment torque varying from 0 to 70 N.m. The bearing performances were greatly affected by the misalignment. The maximum pressure in the mid-plane decreased by 20 percent for the largest misalignment torque while the minimum film thickness was reduced by 80 percent. The misalignment caused more significant changes in bearing performance when the rotational speed or load was low. The hydrodynamic effects were then relatively small and the bearing offered less resistance to the misalignment.
115 citations
55 citations
TL;DR: In this article, the performance characteristics of a capillary-compensated hole-entry hybrid misaligned journal bearing have been studied theoretically, where the journal of the bearing is allowed to tilt on an axial plane containing the load vector and on a plane perpendicular to the axial surface of the hull.
36 citations
TL;DR: In this article, the analysis of a non-recessed worn hybrid journal bearing with orifice restrictors was performed using Newton-Raphson method, FEM is used for solving Reynolds equation governing the flow of lubricant in the bearing clearance space.
35 citations
TL;DR: In this paper, an analysis for calculation of the dynamic force and moment response in turbulent flow, orifice compensated hydrostatic journal bearings is presented, where the fully developed flow of a barotropic liquid is described by variable properties, bulk flow equations and local turbulent friction factors based on bearing surface condition.
Abstract: An analysis for calculation of the dynamic force and moment response in turbulent flow, orifice compensated hydrostatic journal bearings is presented. The fully developed flow of a barotropic liquid is described by variable properties, bulk-flow equations and local turbulent friction factors based on bearing surface condition. Bearing load and moments and, dynamic force and moment coefficients are calculated for perturbations in journal center displacements and misaligned journal axis rotations. Numerical results for the effect of static misalignment angles in the plane of the eccentricity vector are presented for a water lubricated hydrostatic bearing. The predictions show that journal axis misalignment causes a reduction in load capacity due to loss in film thickness, increases the flow rate and produces significant restoring moments (couples). Force and moment coefficients due to dynamic journal axis rotations are also discussed. 37 refs.
32 citations