Static analysis of the stresses of clutch components with infinitely variable adjustment of the torsional flexibility using MES

Kołodziej, Paweł; Boryga, Marek

doi:10.17814/mechanik.2017.11.178

Cited by 2 publications

(2 citation statements)

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“…The proposed solutions would fulfill the role of a typical flexible system, comprising a shock absorber and helical spring, and at the same time enabling the adjustment of the stiffness to the working conditions of the lifter. In the first structural solution (Kołodziej and Stępniewski, 2007;Kołodziej and Boryga, 2014;Kołodziej and Boryga, 2017), flat springs were used, parallel to the axis (Fig. 8a).…”

Section: Resultsmentioning

confidence: 99%

Stress Analysis of the Sugar Beet Lifter with the Finite Element Method (FEM)

Boryga

Kołodziej

2019

Agricultural Engineering

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The article presents the method of creating a 3D model of a passive lifter with (polder) plowshares, used in sugar beet harvesters, along with stages of its preparation and results of stress analysis. The computer simulation takes into account force timelines obtained during field tests of the tool. The Stress analysis module of the Autodesk Inventor program was used for the analysis, using the finite element method (FEM). The analysis included the elements that constitute the working part of the lifter, whereas elements of the flexible system were omitted. The results confirm that the lifter structure was developed correctly in terms of durability. The highest reduced stresses, calculated according to the Huber-Mises-Hencky (HMH) hypothesis, were 128.4 MPa (the minimum value of the safety factor related to the yield point is 1.61). The paper also discusses the construction of two flexible couplings with infinitely variable torsional stiffness, which can be used as an alternative solution for a typical flexible system: a shock absorber and a helical spring.Keywords: passive sugar beet lifter, stress analysis finite element method (FEM) system with adjustable torsional stiffness

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Section: Resultsmentioning

confidence: 99%

Stress Analysis of the Sugar Beet Lifter with the Finite Element Method (FEM)

Boryga

Kołodziej

2019

Agricultural Engineering

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“…Among the elements capable of changing torsional stiffness designed for use in mechanical drives, pneumatic flexible shaft couplings [21,33], couplings with magnetorheological elastomers [34][35][36], magnetic shaft couplings [37][38][39][40], and also couplings with variable active length leaf springs [41][42][43] can be mentioned.…”

Section: Introductionmentioning

confidence: 99%

Novel Design of Variable Stiffness Pneumatic Flexible Shaft Coupling: Determining the Mathematical-Physical Model and Potential Benefits

Kaššay,

Grega,

Urbanský

et al. 2023

Machines

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Presently, mechanical system vibroisolation is becoming increasingly important. One of the new approaches is semi-active vibroisolation using elements capable of changing a selected mechanical property. These include, among others, pneumatic flexible shaft couplings capable of changing torsional stiffness during operation. The main goal of the article is to examine the potential advantages of a newly patented pneumatic coupling over a current type with the same pneumatic element arrangement. For comparison, parameters determinable from static load characteristics were selected. These parameters are maximum twist angle and torque, average torsional stiffness, and the percentage of torque transmitted by the bellows rubber shell. In all cases, the new coupling had better properties. Since the prototype of the new coupling has not yet been produced, its parameters were determined from its mathematical-physical model. The article contains a full procedure to obtain the static load characteristic of a new coupling type, beginning with the determination of air bellows force/height and volume/height characteristics, then optimum sizes of coupling with regards to the operating range of elements, the dependency of element height on the coupling’s twist angle, and finally the computation of the static load characteristic considering isothermal gas compression. The presented procedure can be applied to any pneumatic bellows where the force/height characteristics of different pressures are given.

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Static analysis of the stresses of clutch components with infinitely variable adjustment of the torsional flexibility using MES

Cited by 2 publications

References 1 publication

Stress Analysis of the Sugar Beet Lifter with the Finite Element Method (FEM)

Stress Analysis of the Sugar Beet Lifter with the Finite Element Method (FEM)

Novel Design of Variable Stiffness Pneumatic Flexible Shaft Coupling: Determining the Mathematical-Physical Model and Potential Benefits

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