Misalignment analysis of journal bearing influenced by asymmetric deflection, based on a simple stepped shaft model

He, Zhenpeng; Zhang, Junhong; Xie, Weisong; Li, Zhouyu; Zhang, Guichang

doi:10.1631/jzus.a1200082

Cited by 31 publications

(14 citation statements)

References 15 publications

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“…They concluded that the temperature increases with increasing misalignment. He et al [85] in 2012 investigated the effect of the journal misalignment caused by an asymmetric rotor structure. They simplified the rotor system as a step shaft problem based on the structure stiffness equivalent characteristic.…”

Section: Thermal Effectsmentioning

confidence: 99%

On the Characteristics of Misaligned Journal Bearings

Jang

Khonsari

2015

Lubricants

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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.

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Section: Thermal Effectsmentioning

confidence: 99%

On the Characteristics of Misaligned Journal Bearings

Jang

Khonsari

2015

Lubricants

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“…Liu et al [5][6][7][8] analyzed the influence of the misalignment of journal on the lubrication characteristics of bearings, and indicated that the misalignment of journal is one of factors that should be considered in the lubrication study of bearings. Zhen et al [9] examined the effect of the misalignment of journal on the lubrication characteristics of bearing on the basis of considering the influence of the specific structure of stepped shaft on the inclination angle of shaft. Isaksson et al [10] theoretically and experimentally investigated the influence of surface roughness on the tribological property of hybrid bearing, and pointed out that the theoretical simulation results are in agreement with the experimental values.…”

Section: Introductionmentioning

confidence: 99%

Effect of the axial movement of misaligned journal on the performance of hydrodynamic lubrication journal bearing with rough surface

Sun

Zhu

et al. 2019

Mechanics & Industry

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Generally, the movement of journal along the direction of bearing axis under the combined action of various factors is neglected in the lubrication study of bearing, which is quite different from the actual working condition of bearing in the shaft-bearing system. In this paper, with a comprehensive consideration of the axial movement of journal, the surface topography of journal and bearing and the misalignment of journal, a new model about the hydrodynamic lubrication of misaligned journal bearing is established based on the average Reynolds equation. Considering the effect of the axial movement of misaligned journal, the lubrication characteristics parameters of rough journal bearing is presented and mainly discussed. The results show that the axial movement of misaligned journal has a distinct effect on the bearing lubrication characteristics. The influence of the axial movement of misaligned journal on the bearing lubrication characteristics is slightly reduced when considering the surface roughness.

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“…Liu et al 6 studied the tribological properties of main bearings during starting-up process for an engine at different starting temperatures. He et al 7 found that the journal inclination had a very significant effect on the oil film pressure distribution based on a simple stepped shaft model. Sun et al, 8 Wei et al, 9 and Sun et al 10 compared the effects of the overall engine block and single bearing housing model on lubrication performances of engine main bearings.…”

Section: Introductionmentioning

confidence: 99%

Numerical study on lubrication performance of engine main bearing with rough surface considering axial movement of crankshaft

Sun

Zhu

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part D:

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In actual operation of an engine, the crankshaft will move along the axis direction of engine main bearings under the combined influence of various influencing factors. Considering the axial movement and crankshaft deformation, a new lubrication model of engine main bearings with rough surface was built based on the average Reynolds equation. The influence of axial movement of deformed crankshaft on performance of main bearing with rough surface was studied. In this study, the axial movement law of deformed crankshaft is measured through experiment, and the finite element method was applied to solve the tilting of crankshaft in the bearing bore resulted from the crankshaft deformation. The results show that the axial movement of deformed crankshaft has a significant impact on performance of main bearing with rough surface. No matter whether or not the surface roughness is considered, the journal center trajectories of main bearings are unclosed three-dimensional space curve due to the axial movement of deformed crankshaft. The influence level of the axial movement of deformed crankshaft on lubrication characteristics of main bearings is directly related to the surface roughness. The influence trend and level of the surface roughness on lubrication characteristics of main bearings are obviously changed when considering the axial movement of crankshaft.

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Misalignment analysis of journal bearing influenced by asymmetric deflection, based on a simple stepped shaft model

Cited by 31 publications

References 15 publications

On the Characteristics of Misaligned Journal Bearings

On the Characteristics of Misaligned Journal Bearings

Effect of the axial movement of misaligned journal on the performance of hydrodynamic lubrication journal bearing with rough surface

Numerical study on lubrication performance of engine main bearing with rough surface considering axial movement of crankshaft

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