Strength and Stability Criteria Limiting Geometrical Dimensions of a Cantilever Impeller

Tkachuk, Mykola; Shut, Olexandr; Marchenko, Andrii; Grabovskiy, Andrey; Lipeiko, Angrii; Polyvianchuk, Andrii; Грицук, Ігор

doi:10.4271/2021-01-5056

Cited by 4 publications

(3 citation statements)

References 16 publications

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“…The rotor is represented by a simplified model of a rotating system structure, which is widely used in applications such as centrifugal pumps or compressors, engines, mixers, and propulsion systems of ships (Kippers et al. , 2010; Tkachuk et al. , 2021; Lu et al.…”

Section: Numerical Algorithmmentioning

confidence: 99%

“…A rotor-bearing model, as shown in Figure 4, is adopted for the numerical simulation in this study. The rotor is represented by a simplified model of a rotating system structure, which is widely used in applications such as centrifugal pumps or compressors, engines, mixers, and propulsion systems of ships (Kippers et al, 2010;Tkachuk et al, 2021;Lu et al, 2022;He et al, 2022). The external loads are mainly applied at one end of the rotor.…”

Section: Scheme Of the Interaction Between Eccentricities And Bearing...mentioning

confidence: 99%

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Influence of deformation-induced misalignment on the performance of hydrodynamic bearings: a comparison between rigid and flexible journal results

Sun,

Liu,

Chocholaty

et al. 2024

ILT

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Purpose Prior investigations concerning misalignment resulting from journal deformation typically relied on predefined misaligned angles. Nevertheless, scant attention has been devoted to the determination of these misaligned angles. Furthermore, existing studies commonly treat the journal as rigid under such circumstances. Therefore, the present study aims to introduce a framework for determining misaligned angles and to compare outcomes between rigid and flexible journal configurations. Design/methodology/approach The bearing forces are considered as an external load leading to journal deformation. This deformation is calculated using the finite element method. The pressure distribution producing the bearing force is solved using the finite difference method. The mesh grids in the finite element and finite difference methods are matched for coupling calculation. By iteration, the pressure distribution of the lubricant film at the equilibrium position is determined. Findings Results show that the deformation-induced misalignment has a significant influence on the performance of the bearing when the journal flexibility is taken into account. The parametric study reveals that the misalignment relies on system parameters such as bearing length-diameter ratio and static load. Originality/value The investigation of this work provides a quantification method of misalignment of hydrodynamic bearings considering the elastic deformation of the journal, which assists in the design of bearing in a rotor-bearing system. Peer review The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-10-2023-0337/

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Section: Numerical Algorithmmentioning

confidence: 99%

Section: Scheme Of the Interaction Between Eccentricities And Bearing...mentioning

confidence: 99%

Influence of deformation-induced misalignment on the performance of hydrodynamic bearings: a comparison between rigid and flexible journal results

Sun,

Liu,

Chocholaty

et al. 2024

ILT

View full text Add to dashboard Cite

show abstract

“…In order to take into account these features and in contrast to traditional procedures, methods of complex generalized parametric modeling of work processes and states have been devised for such structures [15,16].…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Substantiating promising technical solutions for turbo- expander power plants based on the research into working processes and states

Tkachuk,

Lvov,

Kravchenko

et al. 2023

EEJET

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One of the most rational methods of energy utilization of compressed gas in pipelines is to use turbo-expander installations. In particular, these are autonomous turbo-expander power stations. A fundamentally new concept has been devised to improve the technical and economic performance of this type of machines. This concept is not focused on a separate aspect of the plant's operation but on their entire set. In particular, physical principles, structures, and technologies were considered as an object of research. First, effective parameters of gas-dynamic flows and heat-mass transfer were determined based on the modeling of work processes. Secondly, progressive designs of turbo-expander units have been created. Thirdly, technologies for the production of parts and assemblies of turbo-expander units have been developed, which combine, unlike the traditional ones, different types of strengthening for contacting parts in their pair. A method of parametric modeling was used to substantiate the technical solutions of the elements of turbo-expander power plants. This makes it possible to determine the technical characteristics of these installations under a certain set of parameters. By purposeful variation, a recommended set of their parameters was determined, which ensure the improvement of the most important technical characteristics. A specialized database was built, which contains an array of information about the regularities of the influence of variation of significant parameters on various characteristics of turbo-expander power plants. Already on this basis, the problems of synthesis of successful technical solutions of turbo-expander power plants are solved. As a result, their high energy efficiency is ensured. Thus, the efficiency of the expander was achieved at the level of 86 % while the resource increased by 20–25 %. All these solutions were implemented in a number of unique turbo-expander units. Their effectiveness has been demonstrated during operation

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Nonlinear Static Reaction of Elastic Ring with Flanges in Rotor Supports

Tkachuk,

Grabovskyi

et al. 2024

Int Appl Mech

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Strength and Stability Criteria Limiting Geometrical Dimensions of a Cantilever Impeller

Cited by 4 publications

References 16 publications

Influence of deformation-induced misalignment on the performance of hydrodynamic bearings: a comparison between rigid and flexible journal results

Influence of deformation-induced misalignment on the performance of hydrodynamic bearings: a comparison between rigid and flexible journal results

Substantiating promising technical solutions for turbo- expander power plants based on the research into working processes and states

Nonlinear Static Reaction of Elastic Ring with Flanges in Rotor Supports

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