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

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.

Magnet-Sleeve-Sealed Mini Trochoidal-Gear Pump Prototype with Polymer Composite Gear

“…However, the selection of the design parameters that has led to the geometry of these standard sets is not clear, at least in the available information sheets. In this work, the design parameters of the selected standard trochoidal-gear set that characterizes the performance of contact stress, volumetric characteristics, and flow irregularity are investigated by means of GeroLAB Package System [29], along with the authors' methodology based on best practice rules [3].…”

“…Fluid-mechanical characteristics are analytically simulated by means of GeroLAB Package System [29] under certain working conditions. Performance indexes such as the volumetric characteristics (chamber volume, volume variation, instantaneous flow, and irregularity flow index, as the rate between the difference of maximum-minimum volume and the average volume) and the maximum contact stress can then be obtained.…”

“…Contact stress history of the first contact point (P k1 in Figure 1) for a complete revolution of the outer gear [29] (a) sintered metal inner gear; (b) POM inner gear.…”

Design of Gerotor Oil Pump with 2-Expanded Cardioids Lobe Shape for Noise Reduction

“…Previous studies on gerotor lobe shape design mostly focused only on the trochoid curves (cycloid, epitrochoid and hypotrochoid), which have been used in a broad array of applications [2][3][4][5]. Mimmi presented a method for avoiding undercutting of cycloid pumps and determined the analytical expression of the limit curve [2].…”

Elliptical lobe shape gerotor pump design to minimize wear

“…Soon Kwon et al [7] proposed an analytical wear model of a gerotor pump without hydraulic effects namely wear rate proportional factor (WRPF). Gamez-Montero et al [8] developed an innovative tool to design a trochoidal-gear pump which able to calculate and plot volumetric and kinematic characteristics of the pump. Demenego et al [9] modified the geometry of rotor profiles of a cycloidal pump which provides only one pair of teeth is in mesh at every instant.…”