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Technical Briefs

GEROLAB Package System: Innovative Tool to Design a Trochoidal-Gear Pump

[+] Author and Article Information
P. J. Gamez-Montero1

Department of Fluid Mechanics, LABSON, Technical University of Catalonia, Colom 7, 08222 Terrassa, Spainpjgm@mf.upc.edu

R. Castilla

Department of Fluid Mechanics, LABSON, Technical University of Catalonia, Colom 7, 08222 Terrassa, Spaincastilla@mf.upc.edu

R. Mujal

Department of Electrical Engineering, Technical University of Catalonia, Colom 1, 08222 Terrassa, Spainmujal@ee.upc.edu

M. Khamashta

Department of Mechanical Engineering, LABSON, Technical University of Catalonia, Colom 7, 08222 Terrassa, Spainmunir.khamashta@upc.edu

E. Codina

Department of Fluid Mechanics, LABSON, Technical University of Catalonia, Colom 7, 08222 Terrassa, Spainecodina@mf.upc.edu

1

Corresponding author.

J. Mech. Des 131(7), 074502 (Jun 05, 2009) (6 pages) doi:10.1115/1.3125889 History: Received November 03, 2008; Revised March 19, 2009; Published June 05, 2009

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.

FIGURES IN THIS ARTICLE
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Copyright © 2009 by American Society of Mechanical Engineers
Topics: Stress , Design , Gears , Pumps
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References

Figures

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Figure 1

GEROLAB package system

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Figure 2

Geometrical design parameters; (a) phase 1: design module, and (b) phase 2: volumetric characteristics module

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Figure 3

Input parameter windows in design module for the QZ9Dc46 gear set

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Figure 4

File of results of the design module for the QZ9Dc46 gear set

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Figure 5

Best gear candidate form of design module for the QZ9Dc46 gear set

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Figure 6

Input parameter windows in volumetric characteristics module for the QZ9Dc46 gear set

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Figure 7

Line of contact, external, and internal profile of the gear for the QZ9Dc46 gear set

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Figure 8

Graphic window of chamber volume, volume variation, and instantaneous flow curves; presentation of volumetric capacity value and irregularity flow index for the QZ9Dc46 gear set

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Figure 9

Input parameter windows of material and fluid contact stress for the QZ9Dc46 gear set

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Figure 10

Contact stress versus angle position at the contact point Pk for the QZ9Dc46 gear set

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Figure 11

Input parameter windows for the PZ9e19 gear set

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Figure 12

Line of contact, external, and internal profile of the gear for the PZ9e19 gear set.

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Figure 13

Graphic window of chamber volume, volume variation, and instantaneous flow curves; presentation of volumetric capacity value and irregularity flow index for the PZ9e19 gear set

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Figure 14

Contact stress versus angle position at the contact point Pk for the PZ9e19 gear set

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