Theoretical and Experimental Investigations of the Rotor Vibration Amplitude of the Turbocharger and Bearings Temperature

Zadorozhnaya, E.; Sibiryakov, S.; Hudyakov, V.

doi:10.24874/ti.2017.39.04.04

Cited by 16 publications

(11 citation statements)

References 14 publications

(18 reference statements)

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“…The calculation of the dynamics of a flexible rotor was carried out in the developed software. Experimental data obtained at the stand (Zadorozhnaya et al , 2017) were used as boundary conditions. The speed range varied from 48,000 to 95,000 rpm.…”

Section: Modelling Methodsmentioning

confidence: 99%

Modelling the thermal state of a turbocharger bearing housing when calculating the rotor dynamics at transient modes

Zadorozhnaya

Hudyakov

Polyacko

et al. 2021

ILT

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Purpose The reliability of various mechanisms and machines is determined by the durability of tribo-units, which must ensure operation at high temperatures and an extended range of rotor shaft speeds. The best performance of the bearing assembly is achieved with hydrodynamic lubrication, which depends on optimal operating conditions and temperature conditions. The purpose of this paper is determining the thermal state of the turbocharger (TCR) bearings. Design/methodology/approach The simulation was carried out in the ANSYS Fluent software package. The boundary conditions for the calculation were obtained from experimental data. The experiments were carried out at a specialized stand created at the scientific and production association “Turbotekhnika”. Findings The result of the simulation was the determination of temperatures and thermal fields in the TCR housing. The data obtained testify to the uneven thermal loading of the bearings. When calculating the dynamics of the rotor, transient modes are considered. The results are the trajectories of the rotor in the space of the bearing clearance. The thickness of the lubricating layer was calculated as a parameter that determines the hydrodynamic friction regime. The thermal state of the TCR elements was evaluated at all the considered rotor speeds. The flexible axis of the rotor was obtained at different speeds. Originality/value The paper presents a model of heat transfer in a TCR housing and rotor dynamics, based on numerical methods, which will help in the design of TCRs and journal bearings.

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Section: Modelling Methodsmentioning

confidence: 99%

Modelling the thermal state of a turbocharger bearing housing when calculating the rotor dynamics at transient modes

Zadorozhnaya

Hudyakov

Polyacko

et al. 2021

ILT

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“…The calculation of the gas dynamics of the turbine compressor impellers was carried out in the ANSYS Fluent software package. Experimental data obtained at the stand [23] were used as boundary conditions. The speed range varied from 48000 to 95000 rpm.…”

Section: Calculation Of Gas Dynamic Processesmentioning

confidence: 99%

Simulation of heat transfer in a turbocharger bearing housing

Zadorozhnaya¹,

Hudyakov²,

Sibiryakov³

2022

tribomat

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Modern world trends in engine building are characterised by the production of forced engines. The most popular and promising forcing method is the use of a turbocharger. The efficiency of journal bearings determines the reliability of TCR, which should be structurally simple, compact, reliable and inexpensive, while providing acceptable characteristics of rotor dynamics, noise, vibration and stiffness speeds. The best performance of the bearing unit is achieved with hydrodynamic lubrication, which depends on optimal operating and temperature conditions. The maximum operating temperature of the bearing assembly must be taken into account at the design stage. The purpose of this article is to develop an algorithm for calculating the heat transfer in the turbocharger bearing housing in order to assess the effect of the thermal state of the radial bearing on its performance and on the dynamics of the rotor. The simulation was carried out in the ANSYS software package and the developed software. The boundary conditions for the calculation were obtained from experimental data. The result of the simulation was the determination of temperatures and thermal fields in the turbocharger housing, as well as the values of the change in clearances under the influence of thermal expansion of parts. Verification of the results was carried out on the basis of comparison with the results obtained by other authors. Conclusions were drawn about the effect of thermal deformations on the rotor dynamics and the hydromechanical characteristics of the bearing.

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“…Figure 2 shows that 90% of the particles have a diameter of 0.88-3.5 µm and 10% are particles with a diameter of 3.5-17.4 µm. The particle size of the friction geo-modifiers is at the level of minimum oil film thickness in engine bearings such as a connecting rod bearing and main bearing [12][13][14], also bearings of turbocharger rotors of internal combustion engines [15,16].…”

Section: Geo-modifier Of Frictionmentioning

confidence: 99%

Influence of Friction Geo-modifiers on HTHS Viscosity of Motor Oils

Levanov

Zadorozhnaya

Vichnyakov

2018

Proceedings of the 4th International Conference on Industrial Engineering

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Motor oil of the internal combustion engine is a means to deliver particles of friction geo-modifiers to the friction surfaces. In this case, the influence of friction geo-modifiers such an important parameter as engine oil HTHS viscosity is of practical interest. The purpose of this article is to determine the HTHS viscosity multigrade engine oils of SAE class 5W-40 with different concentrations of friction geo-modifiers on the basis of pure serpentine. The tapered bearing simulator TBS 2100E TANNAS was used to measure the viscosity of oils at shear rates 10 6 s −1 . A lubricating composition was prepared using two samples of multigrade engine oils viscosity grade SAE 5W-40. The mass concentration of the friction geomodifiers was 0.1, 0.3, and 0.5% in each sample. The friction geo-modifiers lead to insignificant decrease in HTHS viscosity multigrade engine oil of viscosity grade SAE 5W-40. The viscosity decreased on 3.5-6.5% for the analyzed samples of motor oils. Therefore, the working conditions of the bearings of the crankshaft are changed insignificantly at the introduction of the friction geo-modifiers in motor oil.

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Theoretical and Experimental Investigations of the Rotor Vibration Amplitude of the Turbocharger and Bearings Temperature

Abstract: A B S T R A C T One of the most urgent issues of the modern world and domestic automobile and tractor production is the problem of the production of

Cited by 16 publications

References 14 publications

Modelling the thermal state of a turbocharger bearing housing when calculating the rotor dynamics at transient modes

Modelling the thermal state of a turbocharger bearing housing when calculating the rotor dynamics at transient modes

Simulation of heat transfer in a turbocharger bearing housing

Influence of Friction Geo-modifiers on HTHS Viscosity of Motor Oils

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