Showing papers by "P. J. Gamez-Montero published in 2009"
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
TL;DR: In this article, the authors elucidate the several causes of local thermal equilibrium (LTNE) in saturated porous media and evaluate the influence of structural characteristics of porous materials and the presence of surfactant in the saturating liquid phase.
39 citations
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
TL;DR: In this paper, a study of the influence of friction moments when misalignment effects are deliberately left aside is carried out, and a theoretical and experimental work has been carried out for columns and an actuator characterizing the critical factors that cause the collapse.
19 citations
TL;DR: In this paper, the movement of the shaft of a driven gear in a gear pump is experimentally studied, and three different methods are considered, and the use of a laser micrometer measurement method is validated.
Abstract: The movement of the shaft of a driven gear in a gear pump is experimentally studied. Three different methods are considered, and the use of a laser micrometer measurement method is validated. In order to use the laser micrometer, some modifications are made to the gear pump. Experimental results for different working pressures and rotational velocities are shown. For a low nondimensional working pressure, defined in a similar way as the Sommerfeld load, experimental and numerical results agree very well for relative eccentricity. Nevertheless, experimental results made clear that the role of the lateral plate of the pump is very important for high nondimensional working pressure. A value of 100 is given for the critical nondimensional working pressure in order to avoid wear and slant in the lateral plate. Frequency analysis of the outlet pressure, as well as the precise measurement of the wear in the pump case, support experimental observation of the inability of the journal to retain the shaft for high nondimensional pressure.
8 citations