A study on the circumferential groove effects on the minimum oil film thickness in engine bearings

Cho, Michael; Shin, Hyung Ju C.; Han, Dong

doi:10.1007/bf03184459

Cited by 8 publications

(5 citation statements)

References 10 publications

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“…Several common types of oil groove shapes, including transverse groove (Janakiraman et al , 2015), axial groove (Zhang et al , 2019), helical groove (Khan and Stolarski, 1994), numeral eight-shaped groove and crisscross groove, have been used in the industrial manufacturing and achieved the certain practical results. On this basis, researchers have put forward plenty of novel lubricant groove designs, such as elliptical grooves (Yen and Chen, 2009), herringbone grooves (Wang and He, 2018), circumferential groove (Cho et al , 2000) and parabolic groove (Liu et al , 2016), to enhance the comprehensive properties of journal bearing. The relevant scholars have used a variety of research techniques consisting of theoretical calculation, finite element analysis, numerical simulation and experimental measurements, to explore the impacts of groove shape on the hydrodynamic characteristics, load-carrying capacity and abrasive wear of journal bearing (Sun et al , 2014; Zhu et al , 2018).…”

Section: Introductionmentioning

confidence: 99%

The influences of lubricant groove shape on the tribological properties of journal bearing under the grease lubrication conditions

Yan

Xue

Wei

et al. 2021

ILT

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Purpose This paper aims to elucidate the effects of lubricant groove shape, vertical load, swing angle and grease injection cycle on the friction and wear performances of journal bearings under the grease lubrication condition. Design/methodology/approach Three different types of lubricant grooves, namely, numeral eight-shaped, axial straight line-shaped and circular blind hole-shaped, were designed and machined in the bearing bush of journal bearings. The tribological behaviors of these journal bearings were investigated on the self-developed reciprocating swing friction and wear tester. Experimental data including the friction coefficient, the friction temperature, the wear loss and wear time were analyzed in detail. The wear morphologies of friction pairs were observed by scanning electron microscope and confocal laser scanning microscope. Findings The load carrying capacity and service life of the journal bearing with circular blind hole-shaped lubricant grooves are not affected. However, the load carrying capacities of journal bearings with numeral eight-shaped and axial straight line-shaped lubricant grooves are declined. The coverage areas of lubricating grease in the bearing bush are associated with the swing angle. The smaller the swing angle is, the more limited the coverage areas of lubricating grease get. Among these journal bearings, the maintenance-free time of journal bearing with circular blind hole-shaped lubricant grooves is the longest because of its large grease storage capacity. Originality/value The journal bearing with circular blind hole-shaped lubricant grooves exhibits the excellent antifriction and wear-resistant properties, making it suitable for the application in the low-speed and heavy-load engineering conditions.

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Section: Introductionmentioning

confidence: 99%

The influences of lubricant groove shape on the tribological properties of journal bearing under the grease lubrication conditions

Yan

Xue

Wei

et al. 2021

ILT

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“…Sun andGui (2005) , Sun et al (2010) adopted different models to study the characteristics of bearing lubrication under different journal misalignments. Cho et al (2000) studied the circumferential groove effect on the minimum oil film thickness. All the papers above did not combine the crankshaft with the bearing to analyze the lubrication.…”

Section: Introductionmentioning

confidence: 99%

Factors influence the lubrication characteristics investigation and optimization of bearing based on neural network

Gong

2016

ILT

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Purpose This paper aims to give the guidance for the design of the bearing. Design/methodology/approach The finite element method, the multi-body dynamics method, the finite difference method and the tribology are combined to analyze the lubrication. Findings The performance parameters of crankshaft-bearing system such as the misalignment, the oil filling ratio and the oil groove are also investigated. Misalignment causes the pressure to incline on one side and the pressure increases obviously. Filling ratio has great relationship with pressure distribution; the factors influencing the filling ratio are also analyzed. Different oil groove models are investigated, as it can provide the theory for oil groove design, and three factors above are always combined to influence the lubrication characteristics. Originality/value The optimization of bearing system is conducted by orthogonal test and neural network, unlike the linear optimization theory. Neural network uses the nonlinear theory to optimize crankshaft-bearing system.

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“…Where increasing L/D ratio exert a destabilization effect. Myung et al 11 presented the effects of circumferential groove on the minimum oil film thickness in engine bearings. The fluid film pressures are calculated by using the infinitely short bearing theory for the convenience of analysis.…”

Section: Introductionmentioning

confidence: 99%

Determination of optimum configuration among different configurations of two-axial groove hydrodynamic bearings

Joy

Roy

2016

Proceedings of the Institution of Mechanical Engineers, Part J:

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A steady-state hydrodynamic analysis of two-axial groove oil journal bearing is investigated in this paper. A computer program is developed to calculate the steady-state hydrodynamic characteristics. To study the various steady-state hydrodynamic characteristics of oil journal bearing, the nondimensional Reynolds’ equation is solved to obtain nondimensional values of load-carrying capacity, flow rate, attitude angle, and friction variable. Nature of design parameters for different groove configurations is studied and using genetic algorithm, an optimized groove location is obtained for two-axial grooved bearing. It has been found that placing the groove on different locations have greater influence on the design parameters such as nondimensional oil flow rate, frictional variable, and nondimensional load-carrying capacity. From numerical simulation of two-axial groove bearing it has been found that the frictional variable and nondimensional load-carrying capacity is better for up–horizontal configuration and flow rate shows a maximum value for some up–up configuration.

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A study on the circumferential groove effects on the minimum oil film thickness in engine bearings

Cited by 8 publications

References 10 publications

The influences of lubricant groove shape on the tribological properties of journal bearing under the grease lubrication conditions

The influences of lubricant groove shape on the tribological properties of journal bearing under the grease lubrication conditions

Factors influence the lubrication characteristics investigation and optimization of bearing based on neural network

Determination of optimum configuration among different configurations of two-axial groove hydrodynamic bearings

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