Predictive analysis of rotor machines fluid-film bearings operability

Polyakov, Roman; Majorov, Sergey; Kudryavcev, Igor; Krupenin, N. V.

doi:10.21595/vp.2020.21379

Cited by 8 publications

(6 citation statements)

References 9 publications

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“…In order to obtain the most accurate values of polynomial coefficients ( 𝑎 4 1 , 𝑎 3 1 , 𝑎 2 1 , 𝑎 1 1 , 𝑎 0 ) in relation to those obtained by an analytical approach, programming was performed to obtain real polynomial coefficients using the mathematical program MATLAB.…”

Section: Development Of An Optimization Model For Vibrodiagnostic Mai...mentioning

confidence: 99%

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Optimization Model of Vibrodiagnostic Maintenance of Turbogenerators

Josimović,

Bogićević,

Serban-loan

2023

adeletters

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In optimizing the vibrodiagnostics of thermal power plants, a mathematical model was developed and used to increase the power plants’ safety and operational characteristics. The choice of diagnostic condition parameters of the components was made based on optimization characteristics that affect the accuracy of the solution and operational readiness of the thermal power plant. The research aimed to develop a universal model by analyzing more optimized vibrodiagnostics of the turbogenerator, which achieves high operational reliability, high safety, an extension of service life, an extension of working life, a reduction of overhaul time, etc. The application of the model represents the concept of optimization with the checking of condition parameters, which is applied to turbogenerator assemblies that have a continuous change of condition parameters as a function of the monitoring time, for which the functional dependence between the intensity of the parameter change and the operating time can be determined.

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Section: Development Of An Optimization Model For Vibrodiagnostic Mai...mentioning

confidence: 99%

“…Turbogenerators represent a crucial part of equipment in thermal power plants [1,2]. The main criteria for the turbogenerator operation are high reliability, many starts, and flexible work [3].…”

Section: Introductionmentioning

confidence: 99%

Optimization Model of Vibrodiagnostic Maintenance of Turbogenerators

Josimović,

Bogićević,

Serban-loan

2023

adeletters

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“…A large number of research works focus on the development of a calculation model for radial sliding bearings with metal coating [1][2][3][4][5][6][7][8][9][10][11][12]. However, lubrication on fused coatings is not a self-sustaining process.…”

Section: Introductionmentioning

confidence: 99%

Calculation model for lubrication of bearings with unconventional support surface profile and fusible shaft surface coating

Badakhov

Zinoviev²,

Мукутадзе³

et al. 2023

E3S Web of Conf.

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This research work uses the true viscous fluid flow equation for the thin layer, the continuity equation, and the equation describing the radius of the fused shaft coated with a metal alloy taking into account the mechanical energy dissipation rate formula to find the asymptotic and the exact self-similar solution for the zero and first-order approximation for the radial sliding bearing with the support profile adapted to friction and lightalloy coating for incomplete filling of the working gap. We obtained the analytical dependencies for the fused surface radius of metal coating and the speed and pressure field. Besides, we determined the key operating parameters of the reviewed friction couple, the carrying capacity, and the friction force. The authors assess the impact of the parameters associated with the fusing of the coating of the friction-adapted support profile and the length of the loaded area on the carrying capacity and the friction force.

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“…The use of such materials considerably improves the performance of tribounits. However, existing design methods do not sufficiently take into account the specifics of low-melting metal and porous coatings, their rheological properties, as well as their universal nature [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

“…Taking into account (7) and ( 8), we get the following system of dimensionless equations and their boundary conditions:…”

Section: Introductionmentioning

confidence: 99%

Increase of wear resistance of tribocontact with low-melting metal and porous coating

et al. 2023

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The paper is devoted to one of the most important problems of increasing wear resistance of tribosystems due to the application of low-melting metal and porous coatings on tribocontact surfaces. The asymptotic and self-similar solution for zero and first approximation was found based on the true viscous fluid flow equation for the “thin layer”, equations of continuity, an equation describing the flow of a lubricant in the body of a porous surface coating of a bearing ring; and an equation describing the profile of the molten surface contour of a bearing ring coated with a low-melting metal alloy, i.e. as a result, excluding the metal coating melt and considering the melt the velocity and pressure fields in the lubricating and porous layers are determined; as well as the load capacity and the friction coefficient, which allows determining the increase of wear resistance – increase of hydrodynamic pattern due to porous and low-melting metal coating of contact surfaces of the tribosystem.

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Predictive analysis of rotor machines fluid-film bearings operability

Cited by 8 publications

References 9 publications

Optimization Model of Vibrodiagnostic Maintenance of Turbogenerators

Optimization Model of Vibrodiagnostic Maintenance of Turbogenerators

Calculation model for lubrication of bearings with unconventional support surface profile and fusible shaft surface coating

Increase of wear resistance of tribocontact with low-melting metal and porous coating

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