Modeling of the Meshing of Trochoidal Profiles With Clearances

Ivanović, Lozica; Devedzic, Goran; Cukovic, Sasa; Mirić, Nenad

doi:10.1115/1.4005621

Cited by 51 publications

(26 citation statements)

References 27 publications

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“…Ivanović has performed a great amount of work related to gerotor pumps as previously exposed. This time, the works of Ivanović et al [110][111][112][113] are preferentially classified as analytical methods to predict operating characteristics. Mathematical models of meshing, contact forces and influence of the clearances were presented with numerical examples, as shown in Figure 18.…”

Section: Methodsmentioning

confidence: 99%

“…These two 3D-models were used Figure 18. Minimum clearance height variation during one rotation (360º) and during one phase (60º) for a gerotor pump unit with fixed axes (Ivanović et al [110]).…”

Section: Integrated Methodsmentioning

confidence: 99%

“…New works of Ivanović et al [110][111][112][113] are once more selected as basic readings to predict operating characteristics in gerotor pumps by using analytical methods; •…”

mentioning

confidence: 99%

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A Review of Gerotor Technology in Hydraulic Machines

2019

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Over the years, numerous investigations have established the gerotor fundamentals. This work aims to provide a complete review of the literature from the last decade, focusing on the articles published in the past five years on gerotor technology in hydraulic machines. The report gives a catalogue of guidelines based on the trochoidal-envelope definition, a background analysis, the worldwide distribution of articles in each continent and country and the most frequently used keywords in the field. The paper identifies state-of-the-art research, and reports on current mainstream ideas. From the historical background, this literature review reports the current approaches in gerotor pumps (geometry and performance approaches, modeling and numerical simulations), orbital motors and new concepts. The report will serve as a guide and a directory for novel engineers working with gerotor technology in hydraulic machines. Another intention of this paper is to disseminate the works of the researchers who use this technology around the world, and to provide a scenario for future international collaboration. The paper gives an account of the disparity between academia and engineering applications. There is currently very little published literature on design and production methodologies for gerotor pumps and orbital motors. Hence, the future goal is to collect recommendations that combine academia and industry expertise to make better use of these extensive studies in the field.

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Section: Methodsmentioning

confidence: 99%

Section: Integrated Methodsmentioning

confidence: 99%

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A Review of Gerotor Technology in Hydraulic Machines

2019

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“…With regard to the first subject, it is important to underline the studies by Litvin, who applied the theory of gearing [10] to cycloidal gerotors in [11], providing a general mathematical framework that is able to describe any kind of rotor profile, and to describe the geometrical conditions that may cause discontinuities in the gear profiles. Other formulations on the same problem, including an original geometrical interpretation by Mimmi, can be found in [12][13][14], while the pump dynamics has been investigated by Ivanovic and colleagues [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Optimization of Gerotor Pumps with Asymmetric Profiles through an Evolutionary Strategy Algorithm

2019

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Gerotor pumps are widely used for fuel and lubricating oil distribution, since they provide an economic and compact solution for low-pressure fluid systems. Made of two internally coupled gears, their behavioral and operative performances are strictly tied to their geometrical designs. Traditionally, the external gear features circular lobes that give origin to a cycloidal profile for the internal rotor. In this paper, the use of profiles based on asymmetric lobes made of elliptic arcs is further explored and expanded. At first, a complete mathematical framework describing the pump geometry and its dynamic behavior is provided, while algorithms used to compute a selected number of performance indexes are presented and when possible, verified. Hence, a single-objective optimization procedure is applied to the traditional cycloidal profile, in order to minimize each of the following quantities: the flow rate irregularity, the expected wear rate, and the estimated rotor mass. Finally, a multi-objective optimization process based on evolutionary strategy is employed, to obtain several asymmetric profiles minimizing the combination of two or more performance indexes. The results are hence compared, and the merits associated with the use of asymmetric lobes are presented.

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“…The most important investigations of the hydraulic pump parameters are given in [2], [4], [5], the model of computer dynamics of the fluid could be found in [6], and profile of the gears in [7]. Research of the gap calculation between the teeth profiles is presented in [8]. Significant publications that relate the stress in the teeth contact of the trochoidal meshing are [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Modelling and simulation of the load in the epicyclic rotary pump with trochoidal gear profiles

Ivanović

Ilić

Miloradović

et al. 2018

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. This paper presents an analysis of the load distribution in the trochoid pump with the planetary movement of the impeller. There are a lot of theoretical and numerical analyses conducted for the gerotor of the pump with fixed positions of the gear axis. Design of planetary gerotor pump has a different load distribution than gerotor with fixed axes. A planetary gerotor consists of a fixed outer gerotor gear with internal gearing and inner gear with an external gearing. The centre axis of the inner gear has a circular motion around the central axis of the fixed gear, because of the eccentricity on drive shaft. The special shape of the gerotor teeth forms chambers with varying volume that allows the flow and pressure of the fluid. During the pump working process the forces of different direction and intensity are present in each of the working chambers. It is necessary to determine the pressure in each of the chambers in order to obtain the load model of the gerotor. Load model will enable the calculation of load distribution in the zone of the maximum contact stresses. This calculation should help in dimensioning of the pump and the achievement of better performance characteristics.

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Modeling of the Meshing of Trochoidal Profiles With Clearances

Cited by 51 publications

References 27 publications

A Review of Gerotor Technology in Hydraulic Machines

A Review of Gerotor Technology in Hydraulic Machines

Optimization of Gerotor Pumps with Asymmetric Profiles through an Evolutionary Strategy Algorithm

Modelling and simulation of the load in the epicyclic rotary pump with trochoidal gear profiles

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