Stress-Strain State of Pneumatic Flexible Shaft Coupling for Ball Mill Drives

Nemchinov, Serge; Khristenko, Alexander

doi:10.20858/sjsutst.2018.99.12

Cited by 2 publications

(1 citation statement)

References 5 publications

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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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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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Evaluación computacional del compartimiento de carga de una aeronave liviana, usando software libre

Suárez

Quintero-Arboleda²,

Cabrera³

et al. 2022

Ciencia y Poder Aéreo

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Este documento presenta la evaluación estructural del cuerpo de una aeronave ligera de categoría vla (masa máxima al despegue inferior o igual a 1200 kg), usando sofware de dinámica computacional de fluidos (CDF) para evaluar el comportamiento aerodinámico de la aeronave y el método de elementos finitos para evaluar su comportamiento estructural. Para su evaluación estructural la aeronave se dividió en cabina, cuerpo y superficies de vuelo (alas y empenaje). Los modelos completos de la aeronave fueron extraídos del modelo cad, elaborado con el sofware SolidWorks® para cada uno de los subcomponentes de la cabina, el cuerpo y las alas y el empenaje. A partir de los cálculos y simulaciones hechas, se concluyó que la estructura central de la aeronave soporta las fuerzas y momentos aerodinámicos, con valores de esfuerzos por debajo de los valores de fluencia del material y factores de seguridad entre 1.58 y 2.60. Sin embargo, se necesita reforzar la unión del ala al fuselaje para que disminuya el esfuerzo localizado que se produce en esa zona. A diferencia de otros métodos reportados en la literatura que utilizan programas muy especializados y de altos costos, el procedimiento para evaluar la aerodinámica y la estructura central de una aeronave liviana categoría VLA que se desarrolló en este estudio, hizo uso de programas de dominio público, en alrededor de 80 % en el proceso de análisis.

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Stress-Strain State of Pneumatic Flexible Shaft Coupling for Ball Mill Drives

Cited by 2 publications

References 5 publications

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

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

Evaluación computacional del compartimiento de carga de una aeronave liviana, usando software libre

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