Unification of epitrochoid origin profile design approaches for external lobed star member used in hydrostatic and gear units

Nag, Abhijit; Maiti, Rishi

doi:10.1177/0954406212448365

Cited by 14 publications

(12 citation statements)

References 30 publications

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“…Maiti [12][13][14][15] was a pioneer in the study of hydraulic motors, especially the orbital rotor low-speed high-torque (LHST) type. Years later and for conventional profiles, a new proposal in the study of hydrostatic and gear units by means of published literature was presented by Nag and Maiti [146]. This proposal, based on the geometry of the profiles and the integration of three geometric design approaches, evolved to new formulae to help the profile selection.…”

Section: Hydraulic Orbital Motorsmentioning

confidence: 99%

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: Hydraulic Orbital Motorsmentioning

confidence: 99%

A Review of Gerotor Technology in Hydraulic Machines

2019

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“…11 The research outlined above has not exhausted the topic, however. In particular, the question of the source of gear deformations, and consequently of the clearances in the pump, remains unanswered.…”

Section: Introductionmentioning

confidence: 97%

Selection of the optimum tooth profile for plastic cycloidal gears

Biernacki

2014

Proceedings of the Institution of Mechanical Engineers, Part C:

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Cycloidal gears make up the main working unit of hydraulic gerotor machines. In the article, a question of a more efficient application of plastics in building the gears is discussed. The discussion is based on a numerical strain analysis which was done by means of the finite elements method. The stress and deformation values in the operating cycloidal gears were specified. The numerical analysis was carried out in two stages in order to determine the optimum gear tooth profile. The profile depends on the tooth height and on the tooth correction coefficient. At the first stage, the optimum tooth height coefficient was calculated. Having determined the optimum value , the analysis was continued, and at the second stage, the optimum correction coefficient v for the gears at an earlier selected constant value was defined. The analysis results were useful in selecting parameters for determining the geometrical characteristics of the cycloidal gears. The parameters were then used in defining the most suitable tooth profile for the hydraulic machine featuring the cycloidal gears.

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“…9 Other papers concerned estimating of the value of the gerotor machines working parameters 10 as well as their geometry. 11 Maiti, Nag and Nagao suggested a way of determining the starting torque depending on the position of the drive shaft 10 as well as uniforming of the geometric design solutions. 11 Gamez-Montero and E. Codina carried out in-depth theoretical and practical research.…”

Section: Introductionmentioning

confidence: 99%

“…11 Maiti, Nag and Nagao suggested a way of determining the starting torque depending on the position of the drive shaft 10 as well as uniforming of the geometric design solutions. 11 Gamez-Montero and E. Codina carried out in-depth theoretical and practical research. 12,13 In their paper 12 they presented analysis which allowed determination of the dynamic properties of the trochoidal pump.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the material and design modifications influence on strength of the cycloidal gear system

Biernacki

2015

Int. J. Precis. Eng. Manuf.

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The working unit of the hydraulic gerotor machine is a system of cycloidal gears. In the paper, ways of increasing the load-carrying capacity of the plastic cycloidal gears have been presented. The objective has been achieved through of structural and material modifications. The modifications were introduced while making the numerical models of the cycloidal gear system. The fundamental feature of the modifications is the combination of a plastic and a steel core in the design of the cycloidal gear system. While examining the system, the influence of the plastic-steel combination on the stress and deformation distributions in the operation of the cycloidal gears was verified. The numerical analysis was conducted using the finite elements method. The results of the analysis show that the introduction of the modifications strengthens the cycloidal gear system. Therefore, the conclusion that a system can work in the fluid power gerotor machines dedicated to operating at higher working pressure p seems justified. A result of the analysis is a presentation of solutions which will enable the strengthening and a higher load-carrying capacity of the gear system. Another finding of the research was determination of the maximum value of working pressure p at which the hydraulic gerotor machines with the modified cycloidal gears can operate.

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Unification of epitrochoid origin profile design approaches for external lobed star member used in hydrostatic and gear units

Cited by 14 publications

References 30 publications

A Review of Gerotor Technology in Hydraulic Machines

A Review of Gerotor Technology in Hydraulic Machines

Selection of the optimum tooth profile for plastic cycloidal gears

Analysis of the material and design modifications influence on strength of the cycloidal gear system

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