Comparison of the dynamic behaviour of two misaligned crankshaft bearings

Lahmar, Mustapha; Harouadi, Farid; Frihi, Djamel; Maspeyrot, Patrick

doi:10.1243/0954407001528041

Cited by 8 publications

(8 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Zhang et al 2 and Sun et al 3 performed lubrication analysis on plain journal bearings and considered the influence of the inclination of journal. Lahmar et al 4,5 studied the main bearings lubrication performance considering the influence of crankshaft deformation on the inclination of crankshaft journal. The results indicated that the misaligned angle of crankshaft journal significantly reduces the minimum oil film thickness, which is one of the factors that must be considered in lubrication design 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:

View full text Add to dashboard Cite

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.

show abstract

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:

View full text Add to dashboard Cite

show abstract

“…Lahmar et al. 15 used the mobility method of Booker to study the steady-state performances (including friction torque, minimum film thickness and axial flow rate) of crankshaft bearings. Moreover, Lahmar et al.…”

Section: Introductionmentioning

confidence: 99%

“…damping coefficients and stiffness coefficients. Lahmar et al 15 used the mobility method of Booker to study the steady-state performances (including friction torque, minimum film thickness and axial flow rate) of crankshaft bearings. Moreover, Lahmar et al 16 obtained the misalignment effect on the journal centre trajectories.…”

Section: Introductionmentioning

confidence: 99%

“…The papers [14][15][16][17][18][19][20][21][22][23] mentioned above focused on the journal misalignment effects on the performances of journal bearing, while the journal misalignment effects on the rotor-bearing system were not involved. Through the experiments, Arumugam et al 24 presented comprehensive investigations of misalignment effects on the vibration characteristics (vibration responses and system natural frequency) of threelobe journal bearing-rotor system.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Comparison of the characteristics of aerostatic journal bearings considering misalignment under pure-static and hybrid condition

Zhang

Zou

2018

Proceedings of the Institution of Mechanical Engineers, Part J:

View full text Add to dashboard Cite

In this paper, the steady-state characteristics, including film pressure, load capacity, stiffness, misalignment moment of aerostatic bearings considering two types of misalignment (along vertical direction [Formula: see text] and along horizontal direction [Formula: see text]) are studied under pure-static and hybrid condition. The journal misalignment effects on the steady-state characteristics under pure-static condition and hybrid condition are studied comparatively. The results show that the load capacity and stiffness increase with the increase in the degree of journal misalignment under hybrid condition, while they decrease with the increase in the degree of journal misalignment under pure-static condition. Moreover, the journal misalignment along two perpendicular direction effects on the performances of aerostatic bearings are also investigated comparatively and the performances of bearing are found to be more sensitive to the misalignment along horizontal direction.

show abstract

“…Diesel engine main bearings can run fasterF and bear a larger load [10][11][12][13]. Elastic deformation on the surface contact of bearings, as well as the bearings themselves, can affect oil film thickness, oil film pressure, and the force and power consumption of friction, thereby affecting the lubricating properties of the main bearing [14][15]. Therefore, it was not possible to ignore elastic deformation when analysing main bearing lubrication properties.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Diesel Engine Main Bearing Lubrication Under Single-Cylinder Misfiring Situation

Liu¹,

Zheng²,

Li³

2015

IJHT

View full text Add to dashboard Cite

In this paper, flexible multi-body dynamics was coupled with elastohydrodynamic lubrication of main bearings to study the lubricating properties of diesel engine main bearings. Data of bearing forces for diesel engine main bearings under rated conditions and cylinder 1 misfired conditions were analyzed, to provide a basis for the tribology design of a main bearing friction pair and the system optimization of a diesel engine. The result showed that single cylinder misfire had a greater influence on the two adjacent main bearing loads and the axis orbits of the two adjacent main bearings, but less effect on the other main bearing load and axis orbits of the other main bearings.

show abstract

Comparison of the dynamic behaviour of two misaligned crankshaft bearings

Cited by 8 publications

References 0 publications

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

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

Comparison of the characteristics of aerostatic journal bearings considering misalignment under pure-static and hybrid condition

Analysis of Diesel Engine Main Bearing Lubrication Under Single-Cylinder Misfiring Situation

Contact Info

Product

Resources

About