Contact problems of a trochoidal-gear pump

Gamez-Montero, Pedro Javier; Castilla, R.; Khamashta, M.; Codina, Esteve

doi:10.1016/j.ijmecsci.2006.06.013

Cited by 49 publications

(63 citation statements)

References 5 publications

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“…[17][18][19] In the previous papers, models of the gear set were 2 dimensional models. For the making of the models, the authors used flat triangular 18 or rectangular 19 elements.…”

Section: Computational Model Of the Gear Systemmentioning

confidence: 99%

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Analysis of the material and design modifications influence on strength of the cycloidal gear system

Biernacki

2015

Int. J. Precis. Eng. Manuf.

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The working unit of the hydraulic gerotor machine is a system of cycloidal gears. In the paper, ways of increasing the load-carrying capacity of the plastic cycloidal gears have been presented. The objective has been achieved through of structural and material modifications. The modifications were introduced while making the numerical models of the cycloidal gear system. The fundamental feature of the modifications is the combination of a plastic and a steel core in the design of the cycloidal gear system. While examining the system, the influence of the plastic-steel combination on the stress and deformation distributions in the operation of the cycloidal gears was verified. The numerical analysis was conducted using the finite elements method. The results of the analysis show that the introduction of the modifications strengthens the cycloidal gear system. Therefore, the conclusion that a system can work in the fluid power gerotor machines dedicated to operating at higher working pressure p seems justified. A result of the analysis is a presentation of solutions which will enable the strengthening and a higher load-carrying capacity of the gear system. Another finding of the research was determination of the maximum value of working pressure p at which the hydraulic gerotor machines with the modified cycloidal gears can operate.

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“…[17][18][19] In the previous papers, models of the gear set were 2 dimensional models. For the making of the models, the authors used flat triangular 18 or rectangular 19 elements.…”

Section: Computational Model Of the Gear Systemmentioning

confidence: 99%

“…Strength analysis of the trochoidal gears in pumps, carried out by means of the finite element method (FEM) by Gamez-Montero et al 18 They proved that the maximum stresses occur in the tooth pair moving around the central point of the toothing.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the material and design modifications influence on strength of the cycloidal gear system

Biernacki

2015

Int. J. Precis. Eng. Manuf.

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“…Research of the gap calculation between the teeth profiles is presented in [8]. Significant publications that relate the stress in the teeth contact of the trochoidal meshing are [9][10][11]. The problems of friction in cycloidal gearing were investigated in [12], [13].…”

Section: Introductionmentioning

confidence: 99%

Modelling and simulation of the load in the epicyclic rotary pump with trochoidal gear profiles

Ivanović

Ilić

Miloradović

et al. 2018

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. This paper presents an analysis of the load distribution in the trochoid pump with the planetary movement of the impeller. There are a lot of theoretical and numerical analyses conducted for the gerotor of the pump with fixed positions of the gear axis. Design of planetary gerotor pump has a different load distribution than gerotor with fixed axes. A planetary gerotor consists of a fixed outer gerotor gear with internal gearing and inner gear with an external gearing. The centre axis of the inner gear has a circular motion around the central axis of the fixed gear, because of the eccentricity on drive shaft. The special shape of the gerotor teeth forms chambers with varying volume that allows the flow and pressure of the fluid. During the pump working process the forces of different direction and intensity are present in each of the working chambers. It is necessary to determine the pressure in each of the chambers in order to obtain the load model of the gerotor. Load model will enable the calculation of load distribution in the zone of the maximum contact stresses. This calculation should help in dimensioning of the pump and the achievement of better performance characteristics.

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“…Among the others, studies on the hydraulic lumped parameters [1,2] and computational fluid dynamics (CFD) [3,4] models, on gear profiles optimization [5,6], contact between gear teeth [7] and friction [8] are just some examples.…”

Section: Introductionmentioning

confidence: 99%

Lumped Parameters Model of a Crescent Pump

Rundo

Corvaglia

2016

Energies

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This paper presents the lumped parameters model of an internal gear crescent pump with relief valve, able to estimate the steady-state flow-pressure characteristic and the pressure ripple. The approach is based on the identification of three variable control volumes regardless of the number of gear teeth. The model has been implemented in the commercial environment LMS Amesim with the development of customized components. Specific attention has been paid to the leakage passageways, some of them affected by the deformation of the cover plate under the action of the delivery pressure. The paper reports the finite element method analysis of the cover for the evaluation of the deflection and the validation through a contactless displacement transducer. Another aspect described in this study is represented by the computational fluid dynamics analysis of the relief valve, whose results have been used for tuning the lumped parameters model. Finally, the validation of the entire model of the pump is presented in terms of steady-state flow rate and of pressure oscillations.

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Contact problems of a trochoidal-gear pump

Cited by 49 publications

References 5 publications

Analysis of the material and design modifications influence on strength of the cycloidal gear system

Analysis of the material and design modifications influence on strength of the cycloidal gear system

Modelling and simulation of the load in the epicyclic rotary pump with trochoidal gear profiles

Lumped Parameters Model of a Crescent Pump

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