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

Biernacki, Krzysztof

doi:10.1007/s12541-015-0073-6

Cited by 19 publications

(11 citation statements)

References 17 publications

(46 reference statements)

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“…The intertooth radial and axial clearance forecast were introduced together with the limit condition of deformations and stresses. Subsequently, Biernacki [74] debated the selection of the optimum tooth profiles for plastic, and Stryczek et al [75] and Biernacki [76] examined the design modifications that influence the strength in a POM set and a modified plastic set.…”

Section: Methodsmentioning

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: Methodsmentioning

confidence: 99%

A Review of Gerotor Technology in Hydraulic Machines

2019

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“…In another publication, 26 the author suggested including mold inserts in both gears of the gear system. The inserts were made of an aluminum alloy, and the idea of the design was presented.…”

Section: Introductionmentioning

confidence: 99%

New construction of cycloidal gear unit made of plastics

Biernacki

2020

Proceedings of the Institution of Mechanical Engineers, Part C:

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Cycloidal gears constitute the main working unit of the fluid power gerotor machine. The paper presents a way of increasing the load-carrying capacity of cycloidal unit made of plastic. The aim has been reached through design and material modifications. As a result of those modifications, a design concept of the cycloidal gear system, which is different from the structures previously produced, has been created. The introduced modifications are based on the theoretical analysis of stress and deformations that occur in cycloidal gears during their operation. The analysis was conducted by means of the finite element method. Although the main focus was on analyzing the mechanism behind the deformations, an attempt was also made at extending the application scope for finite element method. The analysis by means of finite element method has been conducted for plastic and steel at the same time. This is result of showed design in which plastics and steel form the construction together one integral part. As a result of the analysis, the maximum value of the working pressure at which hydraulic gerotor machines with plastic cycloidal gears can work was determined. Thanks to the use of the finite element method one can point out the way of introduction of plastics in hydraulic machines construction.

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“…Cycloid drive, which has big transmission ratio, compact size and large load capacity including high bending and contact strength, has been the popular gear reducers of small teeth difference planetary applied in precision transmission such as robot and aerospace areas (Li, 2014). A lot of researches about cycloid drives, including conjugate theory (Chang, 2003), meshing characteristics (Hwang, 2007) and mechanical properties (Biernacki, 2015), have been reported. It should be a valuable research topic that a new type of cycloid profile which have these disadvantages in the external drive can be developed.…”

Section: Introductionmentioning

confidence: 99%

Geometry generation principle and meshing properties of a new gear drive

Han

Shi

Liu

et al. 2018

JAMDSM

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The generation principle of composite cycloid is proposed for the tooth profile of external drive. Firstly, a two-link mechanism is developed as the equivalent mechanism to describe the geometric principle of cycloid by introducing the motion transforming method. Then the path curve of n-order cycloid motion is generalized using n+1 link mechanism. The new second-order, third-order and fourth-order composite cycloid equations of tooth profiles, including the corresponding link mechanisms, are derived and compared. It is found that the fourth-order composite cycloid is more suitable and potential for the gear design. Secondly, based on differential geometry and meshing theory, the mathematical models, including original composite cycloid profile, meshing equation, conjugate profile and meshing line are established. Subsequently, the meshing properties, such as contact ratio, sliding ratio and mechanics property analysis are conducted and compared with involute gear drive. Transmission efficiencies under different operating conditions are performed on the FZG gear test rig. Theoretical and experimental results demonstrate that greater contact ratio, smaller sliding ratio, superior bending and contact stress, and high efficiency of the new gear are represented in comparison with the involute gear.

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

Cited by 19 publications

References 17 publications

A Review of Gerotor Technology in Hydraulic Machines

A Review of Gerotor Technology in Hydraulic Machines

New construction of cycloidal gear unit made of plastics

Geometry generation principle and meshing properties of a new gear drive

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