Some Methods to Reduce Noise in Toothed Belt Drives

Kagotani, Masanori; Aida, Toshio; Koyama, Tomio; Sato, Susumu; Hoshiro, Takeshi

doi:10.1299/jsme1958.24.723

Cited by 16 publications

(6 citation statements)

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“…In accordance with conducted studies, the main sources of noise associated with the belt-pulley interaction come from vibration of material structure, and friction [33,34]. Characteristic of belt transmissions are constant sounds associated with transverse vibrations of the belt and cyclic impacts from the meshing of the belt and pulley [35][36][37][38][39][40]. The measured amplitude of the sound pressure from the impacts ought to be proportional to the width and speed of the belt.…”

Section: Introductionmentioning

confidence: 52%

A Preliminary Studies of the Impact of a Conveyor Belt on the Noise Emission

et al. 2022

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This article performs a comparative analysis of noise generated by conveyor belts with different design parameters. The study was conducted for belts with the same tensile strength, differing in the physical parameters of the cover rubber. Noise emission measurements were performed on a laboratory belt conveyor. The test on the stand allowed for the determination of the noise emission as a function of variable operating parameters: the tensioning force and linear speed of the belt. Research results indicated a significant impact of speed on the emitted noise. The effect of belt tension on noise emission is small, and it is definitely less significant than the effect of linear speed. The results also show that it is possible to select a conveyor belt that emits less noise under the same operating conditions. The analysis of the results allowed us to determine the impact of the physical parameters of the belt covers on the emitted noise.

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Section: Introductionmentioning

confidence: 52%

A Preliminary Studies of the Impact of a Conveyor Belt on the Noise Emission

et al. 2022

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“…In order to investigate the nonlinear behaviour of power transmission belts, Moon and Wickert [13] considered the case of a flexible elastic string that is driven by an eccentrically mounted drive and idle pulleys. In this case, the excitation is given by w(0, t) = e 0 sin ω m t w(l, t) = e 1 sin(ω m t + θ) (6) where e 0 and e 1 are the dimensionless amplitudes of pulley eccentricities, ω m is the excitation frequency and θ the phase difference between the two ends of the belt span.…”

Section: Belt Transverse Vibration Theorymentioning

confidence: 99%

“…Kubo et al [5] suggested softening the bottom lands of the belt or the tooth tip lands of the pulley, adding an idler on the tight strand and making a non-cylindrical pulley shape, preferring, for example, a barrelled shape. Alternatively, Kagotani et al [6] showed that the noise can be effectively reduced by a suitable selection of the pitch difference between belt and pulley.…”

Section: Noise Generation Mechanisms and Featuresmentioning

confidence: 99%

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A new approach to the measurement of transverse vibration and acoustic radiation of automotive belts using laser Doppler vibrometry and acoustic intensity techniques

Sante

Rossi

2001

Meas. Sci. Technol.

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This work aims at utilizing state-of-the-art and powerful measurement techniques to develop a tool for estimating the acoustic radiation of synchronous belts during the design stage. One of the main objects of this work is that of reducing the large number of tests currently employed. Effective measurement technologies, such as laser and acoustic intensity measurement techniques, are employed to support the entire development of the predicting tool, from the analysis of the noise and vibration phenomena to the validation of the numerical models. The proposed method can also be applied successfully to the analysis of noise generating mechanisms, especially belt vibration responses.In a previous work, it has been shown that the noise radiated at meshing frequency by a belt drive, simply composed of two pulleys and driven by an electric motor, can be estimated using vibration measurements, taken by a scanning laser Doppler vibrometer, as inputs for a boundary element model. The same approach is here extended to a more complex test bench, with an internal combustion engine cylinder head giving additional excitation. The test bench has been designed and realized in order to reduce the noise radiation due to interfering sources (electric motor, cooling system etc) and to make it possible to measure the noise contribution from the belt drive only.Reference noise measurements have been performed by acoustic intensity techniques. The sound power values obtained from these measurements have been compared to those obtained from the boundary element model. The techniques employed in this work have been shown to be able to analyse resonance and meshing phenomena on a real belt drive geometry, as had not been done before, based on the literature survey reported.

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“…The main types of noise generated by a synchronous belt drive have been identified [2][3][4][5][6] as:…”

Section: Introductionmentioning

confidence: 99%

Measurement techniques for the acoustic analysis of synchronous belts

Sante

Revel

Rossi

2000

Meas. Sci. Technol.

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At present, in the automotive field, the noise generated by belt drives is evaluated by using microphones in the proximity of the belt, crankshafts, idlers and so on. Such a method can be misleading, since it may easily include the contributions of other noise sources present during the measurement. Moreover, a large amount of data is needed in order to test various layouts and various running conditions. We present a method for the analysis and prediction of the noise generated by belt drives which consists of two distinct phases in this paper. For simplicity, a two-pulley belt drive has been considered and the results have been validated at the meshing frequency, at which, as has been shown in the existing literature, the phenomenon of noise generation is mainly concentrated. In the first stage of the work, the acoustic power generation of the belt drive being tested was measured by means of acoustic intensity techniques. Subsequently, an acoustic prediction was performed by using vibration data obtained with a scanning laser Doppler vibrometer (SLDV) as inputs for a boundary element code. The SLDV was used because of its capability of measuring in-operation data on the running belt, which would not have been possible using traditional contact sensors (accelerometers and so on). The results obtained in the two phases were finally compared in order to evaluate the relation between the vibratory behaviour and the total acoustic radiation determined experimentally. The experimental and numerical data agree fairly well, adding precious information on the noise generation mechanisms and showing the feasibility of modelling the vibro-acoustic behaviour of belt drives and the possibility of a totally numerical procedure. In particular the implementation of an entirely numerical procedure using, for example, data generated through the use of codes for the dynamic characterization of mechanical systems (multi-body mechanical models and so on) seems foreseeable. In the final section of the present work, the uncertainty arising from the measurement processes of the investigation method presented is also discussed.

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Some Methods to Reduce Noise in Toothed Belt Drives

Cited by 16 publications

References 0 publications

A Preliminary Studies of the Impact of a Conveyor Belt on the Noise Emission

A Preliminary Studies of the Impact of a Conveyor Belt on the Noise Emission

A new approach to the measurement of transverse vibration and acoustic radiation of automotive belts using laser Doppler vibrometry and acoustic intensity techniques

Measurement techniques for the acoustic analysis of synchronous belts

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