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E. Codina

Bio: E. Codina is an academic researcher from Polytechnic University of Catalonia. The author has contributed to research in topics: Gear pump & Bond graph. The author has an hindex of 8, co-authored 8 publications receiving 161 citations.

Papers
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Journal ArticleDOI
TL;DR: In this paper, the authors describe the behavior of actuators under load capacity with experimental validation, characterizing the critical factors that cause the collapse and proposing useful design criterions.

46 citations

Journal ArticleDOI
01 May 2007
TL;DR: In this article, the authors describe an extensive study of trochoidal-gear pumps, and apply the bond graph technique to simulate the instantaneous flow, taking into account different types of leakage by modelling them.
Abstract: The present paper describes an extensive study of trochoidal-gear pumps. As described in part 1 of the current paper, geometry and kinematics of trochoidal profiles and volumetric characteristics were considered to different extents. The bond graph technique was applied to model a trochoidal-gear pump based upon an ideal representation in order to simulate the instantaneous flow where the intricate aspects of leakage had been deliberately left aside. Nevertheless, leakage and interaction of the flow inside the pump are now presented in Part 2. The bond graph technique is applied to model a trochoidal-gear pump based upon a real representation in order to simulate the instantaneous flow, taking into account the different types of leakage by modelling them. Results from simulation of both models are compared and significant conclusions are obtained. The paper also examines the experimental determination of the flow ripple. A convenient method of experimentally measuring the so-called ‘secondary sour...

31 citations

Journal ArticleDOI
TL;DR: In this article, an integrated package system for the improvement of the design methodology of a trochoidal gear, which works as a part of a hydraulic pump, is introduced. But the existing methodologies and software fail to thoroughly address the design by taking into account both performance indexes: volumetric characteristics and teeth contact stress.
Abstract: An innovative tool for the improvement of the design methodology of a trochoidal gear, which works as a part of a hydraulic pump, is introduced. For the past few years, new, specific, and demanding applications of this type of pumps have demanded to maximize efficiency and to reduce manufacturing costs by improving its two main performance indexes: volumetric characteristics and teeth contact stress. The existing methodologies and software fail to thoroughly address the design by taking into account both performance indexes. The software presented is an integrated package system, which is composed of three basic modules: design, volumetric characteristics, and contact stress module. As a result, by consecutively following each module, this new tool allows to find the better gear set for the concrete initial required design parameters. An application using the GEROLAB package system methodology is carried out to obtain the best candidate, which is compared and contrasted with a gear set of a specific gerotor pump unit. As a conclusion, this new software aims to lead the designer to a better design by improving performance indexes of a new born gerotor pump project.

23 citations

Journal ArticleDOI
01 May 2007
TL;DR: The bond graph technique is applied to model a trochoidal-gear pump based upon an ideal representation in order to simulate the instantaneous flow and a convenient method of experimentally measuring the so-called ‘secondary source’ method is presented.
Abstract: The current paper presents an extensive study aimed at trochoidal-gear pumps. In recent years their important application in the automotive industry, where trochoidal-gear pumps are increas...

20 citations

Journal ArticleDOI
TL;DR: The use of air bubbles for the analysis of the turbulence in the suction chamber of a gear pump with Time Resolved Particle Image Velocimetry (TRPIV) is considered in this article.

20 citations


Cited by
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Journal ArticleDOI
24 Aug 2017-Energies
TL;DR: In this article, a review of the different methodologies used in the last years for the simulation of the flow rates generated by Gerotor, external gear and crescent pumps is presented.
Abstract: Gear pumps represent the majority of the fixed displacement machines used for flow generation in fluid power systems. In this context, the paper presents a review of the different methodologies used in the last years for the simulation of the flow rates generated by gerotor, external gear and crescent pumps. As far as the lumped parameter models are concerned, different ways of selecting the control volumes into which the pump is split are analyzed and the main governing equations are presented. The principles and the applications of distributed models from 1D to 3D are reported. A specific section is dedicated to the methods for the evaluation of the necessary geometric quantities: analytic, numerical and Computer-Aided Design (CAD)-based. The more recent studies taking into account the influence on leakages of the interactions between the fluid and the mechanical parts are explained. Finally the models for the simulation of the fluid aeration are described. The review brings to evidence the increasing effort for improving the simulation models used for the design and the optimization of the gear machines.

76 citations

Journal ArticleDOI
TL;DR: In this article, the evolution of the boundaries of the domain is very complex, and an arbitrary Lagrangian-Eulerian (ALE) formulation is used with mesh deformation and local remeshing.

67 citations

Journal ArticleDOI
TL;DR: In this article, the tip width of the inner rotor is controlled by inserting a circular-arc curve between the hypocycloid and epicycloid curves, and the outer rotor is designed using the closed-form equation for the internal rotor and the width correction coefficient.
Abstract: In the case of internal gear pumps, the eccentricity of the outer rotor, which resembles a circular lobe, must be limited to a certain value in order to avoid the formation of cusps and loops; furthermore, the tip width of the inner rotor, which has a hypocycloid curve and an epicycloid curve, should not be allowed to exceed the limit value. In this study, we suggest that the tip width of the inner rotor be controlled by inserting a circular-arc curve between the hypocycloid and epicycloid curves. We also suggest that the outer rotor be designed using the closed-form equation for the inner rotor and the width correction coefficient. Thus, it is possible to design a gerotor for which there is no upper limit on the eccentricity, as in this case, undercut is prevented and there is no restriction on the tip width. We also develop an automated program for rotor design and calculation of the flow rate and flow rate irregularity. We demonstrate the superior performance of the gerotor developed in this study by analyzing the internal fluid flow using a commercial computational fluid dynamics (CFD)-code.

55 citations

Journal ArticleDOI
TL;DR: In this article, the authors developed a general mathematical model of trochoidal gearing that can be applied for Gerotor pumps and cyclo reducers, where the inner gear profile is described by peritrochoid equidistance and the outer gear profile by circular arc.
Abstract: This paper explains development of the general mathematical model of trochoidal gearing that can be applied for gerotor pumps and cyclo reducers. The model analyzes geometry and physics of the gearing pair in trochoidal pump where the outer gear has one tooth more than the inner gear. The inner gear profile is described by peritrochoid equidistance and the outer gear profile by circular arc. Mathematical model of gearing with clearances is based on the principle of an ideal profile development. Minimum clearance height between teeth profiles in relation to instantaneous gear ratio is determined. The influence of gear profile geometrical parameters on gearing process, clearance height change, and pulsation of drive moment is analyzed and presented in numerical examples. Obtained results can be used for the design of the trochoidal gearing where accurate and silent operation is required. [DOI: 10.1115/1.4005621]

51 citations

01 Jan 2010
TL;DR: In this paper, the authors present a table of contents and a list of attributes for each of the following categories: Table of Contents V Table of Contents VI List of TABLES VII List of Figures VIII List of FIGURES IX List of Symbols
Abstract: II ACKNOWLEGEMENTS V TABLE OF CONTENTS VI LIST OF TABLES XII LIST OF FIGURES XIII LIST OF SYMBOLS XXVIII Chapter

47 citations