Hydromechanical characteristics of complex-loaded siding bearing with allowance for nonroundness of the pivot shaft and bush

Prokop’ev, V. N.; Boyarshinova, A. K.; Гаврилов, К.

doi:10.3103/s1052618809040177

Cited by 4 publications

(4 citation statements)

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“…The degree of perfection of bearings with floating bushings is estimated by calculations of the stability characteristics of mobile elements and hydro-mechanical characteristics [21], which include friction losses, dissipation in lubrication, the thickness of the lubricating layer and temperature, the values of the hydrodynamic pressures. Those characteristics allow you to directly or indirectly estimate the heat release rate and the fatigue life of bearings, wear and tendency to galling of friction surfaces.…”

Section: Methods Of the Theoretical Analysismentioning

confidence: 99%

“…Those characteristics allow you to directly or indirectly estimate the heat release rate and the fatigue life of bearings, wear and tendency to galling of friction surfaces. The system of equations of the motion for a flexible asymmetric rotor, which leans on multilayer bearings, is presented by V. Prokopiev et al [21], P. Taranenko et al [15].…”

Section: Methods Of the Theoretical Analysismentioning

confidence: 99%

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

Zadorozhnaya¹,

Sibiryakov²,

Hudyakov³

2017

Tribol. Ind.

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Section: Methods Of the Theoretical Analysismentioning

confidence: 99%

Section: Methods Of the Theoretical Analysismentioning

confidence: 99%

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

Zadorozhnaya¹,

Sibiryakov²,

Hudyakov³

2017

Tribol. Ind.

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“…Постановка задачи, математическа модель и алгоритм расчета ГМХ сложнонагруженных ПС, форма поверхностей которых отличается от круглоцилиндрической, представлена в работе [37]. Массовая концентрация активных абразивных частиц в масле более 0,1 % приводит к резкому повышению максимальной скорости изнашивания подшипника, и данную концентрацию следует считать предельной с точки зрения его предотказного состояния.…”

Section: рис 6 окончаниеunclassified

Calculation-experimental method for determining the prefailure state of complexly loaded journal bearings.

Nikitin¹,

Zadorozhnaya²,

Levanov³

2022

MEI

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The article deals with the types of wear and failures of journal bearings. Based on the physics of failures, a method for determining the pre-failure state of plain bearings is proposed, including: determination of the limiting clearance in the bearing; determination of the limit value of oil viscosity; determination of the limiting value of the ovality of the shaft neck and liners; determination of the maximum area of chipping of the surface of the liners; determination of the limit value of the concentration of active abrasive particles in the lubricant. The solution of these problems is based on the calculation of the determination of the hydromechanical characteristics (HMC) of bearings using the hydrodynamic theory of lubrication, the determination of the zones of contact interaction between the elements of the rolling stock, the duration of the boundary lubrication regime, the amount of wear on the surfaces of the sleeve and the shaft neck. Calculation studies were carried out on the example of calculating the dynamics of the connecting rod bearing of the crankshaft of a heat engine. In particular, it is shown that with a diametrical clearance in the connecting rod bearing of 90–120 μm, the duration of the boundary regime of lubrication is more than 25%, which is the limiting value. Reducing the oil viscosity (measured at 100 С) below 9.5 mPa∙s is unacceptable, as it leads to an increase in the duration of the boundary lubrication regime by up to 42%. For the same reasons, the ellipticity of the liners more than 5 microns is unacceptable. A mass concentration of active abrasive particles in the oil of more than 0.1% leads to a sharp increase in the maximum wear rate of the bearing, and this concentration should be considered the limit in terms of its pre-failure state. The technique allows at the early stages of designing machines, which include hydrodynamic plain bearings, to determine the criteria for their pre-failure state.

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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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Hydromechanical characteristics of complex-loaded siding bearing with allowance for nonroundness of the pivot shaft and bush

Cited by 4 publications

References 0 publications

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

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

Calculation-experimental method for determining the prefailure state of complexly loaded journal bearings.

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

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