Contact problems of a trochoidal-gear pump
TL;DR: In this article, the authors presented a simplified analytical model of a trochoidal-type machine when friction at the contact points is neglected and evaluated the performance of the gear set through the calculation of the normal maximum contact stress in the gear teeth.
About: This article is published in International Journal of Mechanical Sciences.The article was published on 2006-12-01. It has received 50 citations till now. The article focuses on the topics: Contact force & Contact mechanics.
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TL;DR: This work highlights the development history and focuses particularly on the research of piezoelectric pumps in four aspects: configuration design, working mode, optimization and application, respectively, and attempts to provide both a guidance for piezOElectric pump researchers on improving their output performances and a resource for those outside the field who wish to identify the best piezoeselectric pump for a particular application.
66 citations
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
Cites background from "Contact problems of a trochoidal-ge..."
...[23] presented a simple analytical model of trochoidal-type machine where contact friction is neglected....
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TL;DR: The mechanism of induction of stresses and deformations in plastic cycloidal gears used in gerotor pumps has been analyzed using the finite element method and the ABAQUS program as discussed by the authors.
Abstract: The mechanism of induction of stresses and deformations in plastic cycloidal gears used in gerotor pumps has been analysed using the finite element method and the ABAQUS program. It has been found that the gear system remains under the influence of the mechanical load resulting from the torque on the pump shaft and the hydraulic load resulting from the activity of pressure in the intertooth displacement chambers. It has also been discovered that the intertooth forces and stresses are formed only in the part of the gear that can be referred to as ‘active’. In the other part of the gear, forces and stresses do not occur, and the part can be referred to as ‘passive’. Another finding of the research is that gear deformations occur such that the teeth of the external gear are deformed and moved in the direction of the active part of the mesh, and the teeth of the internal gear in the direction of the passive part. Thus, radial and axial intertooth clearances are formed, which result in internal leakages in the...
41 citations
12 Feb 2010
TL;DR: In this paper, the analysis of the forces and moments between gears in contact with a gerotor pump was performed to reach a more accurate solution for the problems related to load distr...
Abstract: This article presents the analyses of the forces and moments between gears in contact with a gerotor pump. The objective was to reach a more accurate solution for the problems related to load distr...
32 citations
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899 citations
TL;DR: In this article, the authors present geometric and kinematic aspects that constitute a premise to the modelling and simulation of gerotor lubricating oil pumps, and two approaches to modelling are presented.
Abstract: The paper presents geometric and kinematic aspects that constitute a premise to the modelling and simulation of gerotor lubricating oil pumps. With reference to a commercial oil pump two different modelling approaches of the pumping elements are addressed: the classical integralderivative approach and the new derivative-integral approach. The latter, based on volumes swept by vector rays, is easier to implement and requires less computer time at equal accuracy. Two approaches to modelling are also detailed that feature different reticulations of the pump and consequently involve a different number of ordinary differential equations (ODE). Depending on the extent and detail of expected informations, either 4 or N+2 ODE must be solved, N being the number of variable volume chambers in the pump. Finally, numerical results of the simulation code, developed in the AMESim environment, have been compared with experimental results presented elsewhere [4].
68 citations
36 citations
TL;DR: In this article, the relevance of testing as an essential counterpart to simulation is stressed, and original modelling techniques are also proposed that provide a unified approach to volumetric pumps studies.
Abstract: With special reference to gerotor lube pumps the paper details how a simulation environment can be instrumental in design development. The relevance of testing is stressed as an essential counterpart to simulation. Original modelling techniques are also proposed that provide a unified approach to volumetric pumps studies.
26 citations
TL;DR: A novel contact detection algorithm in the framework of the contact problem analysis with the finite element method using Overhauser splines is presented, which provides more accurate contact stress predictions than other already established methods.
25 citations