EFEITO DE PULVERIZADOR COM ASSISTÊNCIA A AR NOS NÍVEIS DE RUÍDO EMITIDOS POR TRATOR AGRÍCOLA
EFEITO DE PULVERIZADOR COM ASSISTÊNCIA A AR NOS NÍVEIS DE RUÍDO EMITIDOS POR TRATOR AGRÍCOLA
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DOI: https://doi.org/10.22533/at.ed.7032401049
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Palavras-chave: Mecanização agrícola; Ergonomia; Norma NR 15.
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Keywords: Agricultural mechanization; Ergonomics; Standard NR 15.
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Abstract: 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. Thus, this work aimed to quantify the noise levels emitted by an agricultural tractor, considering different engine speeds, to evaluate the influence of air-assisted sprayer activation on noise levels, at the tractor's operating station and one meter away, to demonstrate the effects that people working close to the mechanized assembly are exposed to. The trial was conducted in an experimental area at the Federal University of Pampa - Campus Alegrete, in the city of Alegrete/RS. As a noise source, a 75 hp (55.2 kW) agricultural tractor was used, coupled to a sprayer with air assistance on the spray bars, and noise levels were captured using a meter. portable sound level meter (digital decibel meter). The treatments were composed of three spray bar air assistance conditions (off, medium, and maximum) and four engine speed levels (1400, 1600, 1800 and 2000 rpm). It was observed that the highest noise levels occurred when the air assistance was operating at its maximum level and at higher speeds, at the operating station; while noise levels reduced as the speed was lowered and the clearance radius increased. Therefore, the variables had a significant effect on noise levels in both locations evaluated.
- Stefani Refatti Moraes
- Vilnei de Oliveira Dias
- Eracilda Fontanela
- Jhon Pablo Lima Cornélio
- Lanes Beatriz Acosta Jaques
- Maria Eduarda Hitz
- Natália do Nascimento Garcez
- Vitor Romário Charão Nunes