Avaliação Do Nível De Ruído Emitido Por Um Trator Agrícola Acoplado a Uma Colhedora De Milho

Damasceno, Flávio Alves; Soares, Cláudio M.; Oliveira, Carlos Eduardo Alves; Ferraz, Gabriel Araújo e Silva; Saráz, Jairo Alexander Osorio

doi:10.13083/reveng.v27i5.889

Cited by 7 publications

(7 citation statements)

References 3 publications

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“…Abnt, 2017) andNR-15 (MTP, 2022), which is 85 dB(A) for 8 h of daily exposure.Souza et al (2005) andSouza et al (2006) found noise levels between 73 and 87 dB(A) in the coffee harvesting operation, using engines similar to the one used in this work Damasceno et al (2019). also found a reduction in the noise level when moving away from the emitting source of a tractor pulling a corn harvester.Although the noise values obtained in this work are below 85 dB(A), according to the Environmental Risk Prevention Program, if the values found are below the tolerance threshold and above the action level (80 dBA),…”

supporting

confidence: 60%

Construction of low-cost benches to assist in teaching machine elements and small engine testing

Oliveira

Souza

Arcoverde

et al. 2022

Int J Innov Educ Res

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The teaching practice in technical, technological, and engineering education requires well-structured laboratories with didactic resources that provide the actors in the teaching and learning process with better interaction between the topics covered and the search for a practice. Thus, it is fundamental that lecturing institutions have teaching resources in their laboratories that the lecturers would use to improve their teaching-learning process. A teaching bench is a good option among the previous didactic models. The machine elements didactic benches allow a better explanation and application of the relationships between the various mechanical elements and related several subjects. For this reason, this work aims to build two didactic benches to assist the teaching-learning process under technical and didactic standards for teaching courses and/or related subjects of machine elements and later performance of engine bench tests to ensure its operation. The first didactic bench aims to assist in classes in relevant subjects involving machine elements. It has several components in it, and its characteristics and functionalities can be visualized. It has an electric engine for activation and a Prony brake type that measures the motor's torque and power demands. Additionally, it allows the student to visualize the correlations of the various calculations with practice, such as transmission ratio, torque, and power. The second didactic bench concerns the analysis of internal combustion or electric engines' functionalities, in which several parameters are analyzed, such as speed motor, torque, power, and fuel consumption. The engine bench has a load cell, rotation sensor, and Prony brake type initially adapted to test two engine models (electric and internal combustion). This work was developed using machine design methodology, highlighting the informational, conceptual, preliminary, and detailed design. The didactic bench tests ensured that they could be used in the teaching-learning process for engineering students. Moreover, with the construction of the small engine test bench, it is possible to evaluate internal combustion engine operating parameters, such as power, strength, rotation, and fuel consumption.

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supporting

confidence: 60%

Construction of low-cost benches to assist in teaching machine elements and small engine testing

Oliveira

Souza

Arcoverde

et al. 2022

Int J Innov Educ Res

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“…The use of personal protective equipment is essential to preserve the physical integrity of machine operators and should be used in short working distances of these (Damasceno et al, 2019;Poje et al, 2016;Oliveira et al, 2020) , even if the levels inside the cabin have reached levels below the critical values recommended by the NR15 standard, in a preventive way it may be interesting to use personal protective equipment (Baesso et al, 2017) in all operations with agricultural tractors.…”

Section: Resultsmentioning

confidence: 99%

A CABINE DOS Can the tractor's cabin allow the noise at the operator's station?PODE ATENUAR O RUÍDO NO POSTO DO OPERADOR?

Filho

Lanças

2022

Braz J Biosyst Eng

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Constant exposure to high noise levels can cause health problems for agricultural machinery operators. Machines equipped with closed cabs can attenuate noise and preserve the operator from an unhealthy condition. Some studies show that in cabin tractors it is possible to renounce the use of hearing protection, however indoor equipment and air conditioning can reach high levels of noise, which need to be further investigated. The present study aimed to evaluate the noise emitted by a cabined agricultural tractor, in different points, inside and outside cabin, in the engine rotations of 800rpm, 2180rpm and 2500rpm. In each reading, 100 noise intensity values were automatically collected, over two minutes with the aid of a digital decibel meter device. The results were compared with the levels assumed by Annex 1 of the regulatory Brazilian standard NR 15, and it was found that the cabin was able to isolate the noise emitted by the engine and its external components in 15%, however, the internal noise reached 81dB(A). The cabin can attenuate external noise and offer a healthy working environment, however, in long working hours it is recommended to use personal protective equipment such as ear protectors.

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“…Older tractors, due to the materials used in their components and ergonomic deprivation, emit higher noise levels and, for the most part, do not have a cab for acoustic insulation (MION et al, 2009;BAESSO et al, 2017;CHAIBEN NETO et al, 2020;GOMES et al, 2021). The absence of a cabin causes an increase of approximately 15 dB(A) in the noise level, since noise occurs around the cabin above the recommended limit of 85 dB(A), indicating extremely uncomfortable working conditions (SANTOS FILHO et al, 2004;RINALDI et al, 2008;DAMASCENO et al, 2019;FARIAS & SCHLOSSER, 2020).…”

Section: Noise Levels In Agricultural Tractorsmentioning

confidence: 99%

“…However, the activation of implements driven or driven by power take-off (PTO) requires greater engine power, raising the noise levels emitted directly or indirectly (DAMASCENO et al, 2019). Due to the greater effort of the engine, required by the implements, soil preparation operations with plows, harrows, subsoilers and scarifiers, present the highest noise levels, exceeding the daily exposure limits established by NR-15, reaching a value above 96 dB(A), making the use of PPE necessary (ARCOVERDE et al, 2011;WEDGE;SOUZA, 2012;EGELA & HAMED, 2017).…”

Section: Sources Of Noise In Tractorsmentioning

confidence: 99%

Noise in agricultural machinery: Modernization and workers' health

Moraes,

Dias,

Cornélio

et al. 2023

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The evolution of agricultural mechanization improved operational and productive performance, reducing human physical effort, and increasing productivity per area. However, the worker remains exposed to various occupational risks when operating an agricultural machine, whether physical, chemical, or biological, increasing the incidence of occupational diseases. The noise generated by agricultural operations is considered one of the main ergonomic factors harmful to the machinery operator and people close to the noise range, affecting not only hearing, but well-being and performance when carrying out work, increasing the possibility of accidents. In research carried out using a mechanized tractor-sprayer set with air assistance in the spray bars, as a way of evaluating the influence of implementing implements on the noise levels emitted by agricultural tractors, an increase in sound intensity was observed when air assistance was used. it was switched on, mainly, in places closer to the noise source, and when the tractor was operating at higher engine speeds. The effects of exposure to noise generated by machinery and agricultural implements are better perceived in the long run, when their effects become more severe. The modernization of the mechanization sector has made it possible to attenuate the noise perceived by operators using cabins, however, employees working in proximity are also exposed to sound emissions, making it essential to use personal protective equipment (PPE), such as ear protectors.

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Avaliação Do Nível De Ruído Emitido Por Um Trator Agrícola Acoplado a Uma Colhedora De Milho

Cited by 7 publications

References 3 publications

Construction of low-cost benches to assist in teaching machine elements and small engine testing

Construction of low-cost benches to assist in teaching machine elements and small engine testing

A CABINE DOS Can the tractor's cabin allow the noise at the operator's station?PODE ATENUAR O RUÍDO NO POSTO DO OPERADOR?

Noise in agricultural machinery: Modernization and workers' health

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