Performance comparison of epitrochoidal, hypotrochoidal, and cycloidal gerotor gear profiles

Robison, Andrew J.; Vacca, Andrea

doi:10.1016/j.mechmachtheory.2020.104228

Cited by 9 publications

(2 citation statements)

References 21 publications

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“…There is considerable research and analysis of gerotor or trochoidal pump efficiency [15][16][17][18][19]. These studies can, with appropriate modifications, also be applied to cycloid drives.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Power Losses in Constrained Cycloid Drive

2023

Teh. vjesn.

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The aim of this paper is to present a theoretical model for efficiency evaluation of a simple cycloid drive train with one degree of freedom (DOF) or constrained cycloid drive. In order to evaluate the efficiency, it is necessary to find the losses generated in the simple cycloid drive, where only losses depending on the load were considered. Expressions for determining speed ratios, efficiency, velocities and forces acting inside the cycloid drive are presented. These expressions are implemented in the theoretical model, where the places where the losses occur are defined. A computer program was created to facilitate analysis and obtain loss values based on different input data. Only load-dependent losses were considered in the theoretical model and computer program. In order to verify the theoretical model, experimental measurements were performed. A physical model of the simple cycloid drive train was created and analyzed on the test bench. The results for "S1" operating mode, i.e. when shaft 2 is stopped, show a mean value of the efficiency of 63.49%, for experimental measurements, while the mean value for theoretical analysis is 65.25%. For the operating mode "S2", i.e. with shaft 1 stopped, the mean value of the experimental measurements of the efficiency is 60.9%, while the theoretical mean value is 62.82%.

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Section: Introductionmentioning

confidence: 99%

Analysis of Power Losses in Constrained Cycloid Drive

2023

Teh. vjesn.

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“…When the question of how to choose the gear set to improve performance indexes arises, optimization has come to assist. Focusing on works of the past five past years, Robinson and Vacca [24,25] and De Martin et al [26] have published complete studies in multi-objective optimization to traditional circular-toothed profiles. As a result, the procedure pinpointed that the industry was able to find optimal solutions at almost the same level as the state-of-the-art pump designs.…”

Section: Introductionmentioning

confidence: 99%

Taguchi Techniques as an Effective Simulation-Based Strategy in the Design of Numerical Simulations to Assess Contact Stress in Gerotor Pumps

Gamez-Montero

Gil

2022

Energies

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The contact problem of a trochoidal gear is a drawback and a well-known performance indicator of a gerotor pump. Although numerical simulations aid in the evaluation of contact stress, the difficult task of determining geometrical parameters, operating conditions, and the number of simulations to run falls to the designer. This paper presents the Taguchi techniques as an effective simulation-based strategy to narrow down the geometrical parameter combinations, reducing the solution space and optimizing the number of simulations. The work is first focused on the validation of the proposed numerical model by means of published contact stress results of recognized researchers in the field, as well as the unification of nomenclature and notation. Then, the Taguchi approach is based on a sequence of four experiments, ranging from the screening case with two levels and seven parameters to multiple levels and four parameters with three software input operating conditions (temperature, torque, and friction coefficient) emulating noise effects. The contact stresses of 128 gear sets, having common volumetric capacity and dimensional constraints to detach mechanical performance from flow rate and casing, were analyzed. Results prove the feasibility of the proposed methodology by identifying the most suitable gear set configuration and predicting the quantifiable performances of a real-working gerotor pump.

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Kinematics and geometrical admissibility conditions of balanced vane pumps with twin lip vanes

Guerra

Battarra

2022

Mechanism and Machine Theory

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Performance comparison of epitrochoidal, hypotrochoidal, and cycloidal gerotor gear profiles

Cited by 9 publications

References 21 publications

Analysis of Power Losses in Constrained Cycloid Drive

Analysis of Power Losses in Constrained Cycloid Drive

Taguchi Techniques as an Effective Simulation-Based Strategy in the Design of Numerical Simulations to Assess Contact Stress in Gerotor Pumps

Kinematics and geometrical admissibility conditions of balanced vane pumps with twin lip vanes

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