Radial Boundary Vibration of Misaligned v-Belt Drives

Moon, J.; Wickert, J. A.

doi:10.1006/jsvi.1999.2258

Cited by 9 publications

(3 citation statements)

References 9 publications

(2 reference statements)

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“…Equations (3), (8), (9), and (10), which describe the transverse vibration of the belt span i and the sheaves' rotations, become…”

Section: Approximate Closed-form Solutionmentioning

confidence: 99%

“…The misalignment of the V-belt drive system sheaves is a mechanical imperfection, which has a great influence on the dynamic behaviour of the system. Indeed, many experimental studies [9] showed that this defect generates transverse vibrations, which are superposed on the mean rigid body motion of the spans as well as slippage and the sound produced by the stick-slip phenomenon at the belt-sheave interface [10]. The lateral misalignment of the sheaves is a periodic source of vibration excitation that depends on these factors: the level of parallel offset misalignment between the sheaves; the bending stiffness of the belt; the pretension; and the belt-to-sheave friction coefficient in addition to other design variables.…”

Section: Equations Of Motionmentioning

confidence: 99%

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Dynamic behaviour of V-belt drive system in the presence of sheaves’ lateral misalignment

Fenina

Fakhfakh

Haddar

2008

Proceedings of the Institution of Mechanical Engineers, Part C:

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This paper presents the effects of lateral misalignment of sheaves, on the transverse span displacements of a serpentine belt drive system that contains a driving sheave, a driven sheave, a belt, and a dynamic tensioner. This defect gives rise to dangerous operating conditions for the system. A hybrid discrete-continuous model is adopted, in which the coupling between the discrete variables describing the rotational motion of the three sheaves and the tensioner arm and the continuous variables describing the transverse motion of the belt spans is taken into account. An analytical method based on the perturbation method is used to determine the explicit expressions of the transverse span displacements and permits the study of the effects of design variables on the dynamic behaviour of the system in the presence of the defect described earlier.

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“…Equations (3), (8), (9), and (10), which describe the transverse vibration of the belt span i and the sheaves' rotations, become…”

Section: Approximate Closed-form Solutionmentioning

confidence: 99%

Section: Equations Of Motionmentioning

confidence: 99%

Dynamic behaviour of V-belt drive system in the presence of sheaves’ lateral misalignment

Fenina

Fakhfakh

Haddar

2008

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…[18]. Moon and Wickert [16] studied the radial belt motions in the case of aligning parallel misaligned pulleys and their effect on the stage of belt engagement. Figure 3 presents enlarged images of the bucking, frictional motion of the V-belt in the groove due to misalignment errors.…”

mentioning

confidence: 99%

The power transmission stability and efficiency of V-belts

Kátai¹,

Szendró

Gárdonyi

2016

Progress in Agricultural Engineering Sciences

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Abstract. The V-belt drive is a rather popular, widely used form of power transmission in agricultural and food industry engineering. At the same time, its stability, the lifetime of V-belt is influenced by several environmental factors, namely in the food industry by the contamination affecting the belt sides, the ambient temperature, humidity and the occasionally aggressive (acidic, alkaline air, air saturated with gases, etc.) medium. In the case of agricultural machinery, the vibration caused by uncertainly oriented pulleys with bearing in different plate structures (often being shaken in the fields) as well as alignment adjustment inaccuracies jeopardize the reliability of the parameters of the drive. Furthermore, the efficiency is determined by several factors together: the slippage occurring during drive transmission, the hysteresis loss resulting from the external and internal friction occurring with the belt entering and exiting the pulley. Experimental equipment and calculation methods were developed to determine the dynamics of temperature increase generated by the belt and pulley relationship. The temperature generated in the V-belt was measured as a function of pretension, pulley diameter and bending frequency. The so-called damping factor characterizing the contact with the pulley (the external friction when entering and exiting the groove) and the hysteresis loss (inner friction) are also determined. On the basis of the damping factor (≈ 400 Ns/m 2 ) of the Vbelt involved in the experiments the other losses (Poth) occurring from the pulley-V-belt contact and internal friction may be estimated. The drive parameters may be optimized with the mathematical model describing the effect of the pulley diameter and belt frequency on the increase in temperature.A standardized calculation method as well as design factors valid for the properly adjusted drive and normal operating conditions determined through empirical and laboratory experiments are used for the sizing of V-belt drives. The lifetime of V-belt drives designed in this way, used in extreme conditions typical of agricultural machinery will not be appropriate and will not provide clear, predictable information for maintenance planning. In such cases the results of our own many lifetime tests conducted in the given circumstances can be safely relied on.The agricultural harvesting machines are large plate-body self-propelled structures on which most of the power supply of the (threshing, cleaning, moving, etc.) machine units handling the crop is realized via belt drives. The distance and angular displacement of the axes involved in the drive can vary within wide limits. The misalignment and angular displacement of the pulleys can be the result of installation instability -due to the plate structure -and the deformation of the plate structure occurring during the * Corresponding author. Phone: +36-28-522080, E-mail: gardonyi.peter@gek.szie.hu 1 Institute of Mechanics and Machinery, Faculty of Mechanical Engineering, Szent István University, Páter K...

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A self-alignment crowned pulley design for high speed paper media transport systems

Kim

Shin

et al. 2013

Microsyst Technol

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Radial Boundary Vibration of Misaligned v-Belt Drives

Cited by 9 publications

References 9 publications

Dynamic behaviour of V-belt drive system in the presence of sheaves’ lateral misalignment

Dynamic behaviour of V-belt drive system in the presence of sheaves’ lateral misalignment

The power transmission stability and efficiency of V-belts

A self-alignment crowned pulley design for high speed paper media transport systems

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