A simulation model of Gerotor pumps considering fluid–structure interaction effects: Formulation and validation

Pellegri, Matteo; Manne, Venkata Harish Babu; Vacca, Andrea

doi:10.1016/j.ymssp.2020.106720

Cited by 20 publications

(7 citation statements)

References 23 publications

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“…[K]{x} = {F} (11) where [K] is the stiffness matrix; {x} is the displacement vector; and {F} is the force vector.…”

Section: One-way Fsimentioning

confidence: 99%

“…For a semi-open impeller, compared with a closed impeller, the stress is relatively small and the manufacturing process is simple. A semi-open impeller is generally used to transport liquids that easily precipitate or those containing granular media [10,11]. When the natural frequency of the pump is the same as the hydraulic excitation frequency, resonance will occur, which can affect the safety and stability of pump operation [12,13].…”

Section: Introductionmentioning

confidence: 99%

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Analysis of Stress–Strain Characteristics and Signal Coherence of Low-Specific-Speed Impeller Based on Fluid–Structure Interaction

Qiao,

Sun,

Zhu

et al. 2023

JMSE

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In this study, an analysis of a low-specific-speed pump is carried out based on the methods of one-way and two-way fluid–structure interactions (FSIs). This study analyzes the influence of FSIs on the internal flow field and external characteristics of the pump. Utilizing a two-way FSI, the signal coherence analysis method is employed to analyze the coherence of signals between the flow field and the structural field. Addressing the issue of a lack of a connection between the two signals, this study bridges a gap in the existing research. The results indicate that different interaction methods have certain influences on impeller stress and deformation. However, in both coupling modes, the maximum deformation and the maximum equivalent stress have the same distribution position. The head error obtained using the two-way coupling method is lower than that of the uncoupled results, which indicates that the two-way FSI calculation results are closer to the experimental results. The pressure pulsation signals at the interface of the impeller and volute exhibit strong coherence with the structural field signals. For low-specific-speed centrifugal pumps, establishing a clear connection between the flow field signals and structural field signals will help guide further optimization of their performance through design.

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“…[K]{x} = {F} (11) where [K] is the stiffness matrix; {x} is the displacement vector; and {F} is the force vector.…”

Section: One-way Fsimentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analysis of Stress–Strain Characteristics and Signal Coherence of Low-Specific-Speed Impeller Based on Fluid–Structure Interaction

Qiao,

Sun,

Zhu

et al. 2023

JMSE

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“…To study pumps, advanced numerical methods are used to study in detail the pressure in the pumped liquid, the stresses in the teeth, the temperature distribution in the liquid and gears, as well as visualize the results of the study and the design stages of the pump. These methods are: finite element [11], computational fluid dynamics (CFD) simulations [12], Virtual Prototype [13] and articles combining these methods [14 -16].…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Perspective directions of mechanical power transmission research

2022

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A lot of publications are devoted to the study of gear transmission, which cover all the features of their design, operation and repair. An in-depth analysis of factors that were not taken into account a decade ago was carried out. The efficiency of the drive, taking into account air resistance, and the stress-strain state of the tooth, taking into account centrifugal deformations, were determined. Thus, there are constant complication of the tasks that researchers set themselves. At the same time, recent achievements in the natural sciences have led to a narrowing of the field of use of gears. Thus, the electric motor replaced the internal combustion engine, which was an important object of research for mechanical engineers. The widespread use DC motors with speed control has led to the abandonment of gearboxes in electric vehicles and metalworking machines. Application of mechanical gears in devices. starting with ordinary watches, and ending with the mechanisms of computer disk drives, is a thing of the past. Further in-depth studies of gears, in some cases, don’t make sense, since the object of research disappears. It is important to identify areas of research that remain relevant in the 21st century. First of all, these are transmission studies that use the latest achievements in other areas of science. These include: the use of new materials in gears; use of new forms of tooth profiles and longitudinal forms of the tooth, without technological restrictions; analysis of the operation of the gear drive based on indirect indicators - the spectrum of noise and thermal fields of housings. Also, the study of gears in which the tooth is a working body, such as chain conveyors and pumps, will never lose relevance. Or, in which the gear train combines a number of functions, for example, the worm gears of elevators, which reduce the angular velocity and serve as a fuse.

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“…In this situation, one rotation of the shaft results in a multiplied number of revolutions of the yoke and of the driving (basic) gear connected to it. When the external gear (Figure 7a) is driven, according to Equation (24), the number of rotations is n 1 = z 1 , and when the internal gear (Figure 7b) is driven, according to Equation (25), the number of rotations is n 1 = z 2 . As a result, the delivery (capacity) of an orbital machine is determined by the formula:…”

Section: Hydraulics Of Gerotor and Orbital Machines 31 Delivery (Camentioning

confidence: 99%

Synthetic Approach to the Design, Manufacturing and Examination of Gerotor and Orbital Hydraulic Machines

Stryczek

2021

Energies

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Gerotor technology is an important research area in the field of hydraulics which attracts the attention of both academic scientists and industry. Despite the numerous publications announced by academics, as well as a considerable number of projects made by industry, the subject has not been exhausted. This paper presents a new approach to gerotor technology which has been formed by gathering the authors’ knowledge of gerotors in a synthetic form. The following scientific and technical results have been obtained: (1) A uniform system of parameters and basic concepts regarding toothing and cycloidal gearing (z, m, λ, v, g) which is consistently used to describe the geometry, kinematics, hydraulics and manufacture of those elements; (2) description of the geometry and kinematics of the epicycloidal and hypocycloidal gears with the use of the adopted system of parameters. Additionally, the epicycloidal/hypocycloidal double gearing is presented, which is an original idea of the authors; (3) description of the hydraulics of the gerotor and orbital machines, and in particular: (i) determination of equations for delivery (capacity) q and irregularity of delivery (capacity) δ using the above-mentioned system of basic parameters; (ii) formulation of the principles of designing internal channels and clearances in the gerotor machines and presentation of the original disc distributor in the epicycloidal/hypocycloidal orbital motor; (iii) presentation of the methods of manufacturing the epicycloidal and hypocycloidal gearings with 12 examples of the systems implemented in practice; (4) presentation of the research methods applied for the examination of the gerotor machines, combining computer simulation and experimental research into a coherent and cohesive whole which results in the effect of research synergy. Such a synthesis of knowledge may serve the improvement, creation and investigation of gerotor and orbital machines carried out by academics and industry.

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A simulation model of Gerotor pumps considering fluid–structure interaction effects: Formulation and validation

Cited by 20 publications

References 23 publications

Analysis of Stress–Strain Characteristics and Signal Coherence of Low-Specific-Speed Impeller Based on Fluid–Structure Interaction

Analysis of Stress–Strain Characteristics and Signal Coherence of Low-Specific-Speed Impeller Based on Fluid–Structure Interaction

Perspective directions of mechanical power transmission research

Synthetic Approach to the Design, Manufacturing and Examination of Gerotor and Orbital Hydraulic Machines

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