An Adiabatic Solution of Misaligned Journal Bearings
01 Apr 1985-Journal of Tribology-transactions of The Asme (American Society of Mechanical Engineers)-Vol. 107, Iss: 2, pp 263-267
About: This article is published in Journal of Tribology-transactions of The Asme.The article was published on 1985-04-01. It has received 39 citations till now. The article focuses on the topics: Adiabatic process & Lubrication.
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TL;DR: In this paper, the misalignment caused by shaft deformation is considered when analyzing the lubrication of a journal bearing and the results show that there are obvious changes in film pressure distribution, the highest film pressure, film thickness distribution, and the least film thickness expression of the misaligned journal bearing.
140 citations
TL;DR: In this article, a stochastic process was used to solve the problem of isotropic steady-state characteristics of hydrodynamic journal bearings of finite width, considering two types of misalignment, axial (vertical displacement) and twisting (horizontal displacement).
77 citations
TL;DR: In this paper, a three-dimensional thermohydrodynamic approach adopted in this study in order to consider the thermal field variations is presented, which also includes lubricant film rupture and reformation phenomena by conserving the mass flow rate.
Abstract: Hydrodynamic journal bearings are essential components for supporting and guiding the rotating shafts of high-speed machinery. Manufacturing defects in assembly or thermal distortions may introduce problems during running, such as misalignment. The destructive effects of this kind of running problem have justified the development of a numerical model to predict the bearing operating characteristics under steady-state conditions. The present work presents in detail the three-dimensional thermohydrodynamic approach adopted in this study in order to consider the thermal field variations. This model also includes lubricant film rupture and reformation phenomena by conserving the mass flow rate. In addition, an experimental validation is made by comparison with measurements carried out on our test device for various operating conditions and misalignment torques. The influence of misalignment direction is also investigated by considering numerical and experimental approaches used in the study of bearing behavio...
70 citations
TL;DR: A literature review of misalignment of the journal bearings is presented in this paper, where the basic theory for the misalignments and some results for the circular journal bearing are also presented to show the general trends of the misalignments.
Abstract: Journal bearing misalignment arise generally from the shaft deformation under load, deflection of the shaft, manufacturing and assembly errors, improper installation, and asymmetric loading. During operations, misalignment has a considerable effect on the static and dynamic performances. It could cause wear, vibration and even system failure. In this article, a literature review of misalignment of the journal bearings is presented. The basic theory for the misalignment and some results for the circular journal bearing are also presented to show the general trends of the misalignment.
55 citations
TL;DR: In this article, the effect of journal misalignment as a result of shaft bending under load is studied and the results show obvious changes at distribution and value of oil film pressure, oil film thickness and oil temperature of journal bearing due to journal mis alignment.
Abstract: Journal bearing friction pair system is one of the most general and essential parts used in various mechanical devices. A special test bench is developed for the study on lubrication performance of cylindrical journal bearings. The effect of journal misalignment as a result of shaft bending under load is studied. The results show obvious changes at distribution and value of oil film pressure, oil film thickness and oil temperature of journal bearing due to journal misalignment. The higher the load on the shaft, the larger the journal misalignment resulted from shaft deformation, the more obvious effect on lubrication performance of journal bearing.
45 citations