Desempenho de um trator em função do tipo de pneu, da lastragem e da velocidade de trabalho

Lopes, Afonso; Lanças, Kléber Pereira; Silva, Rouverson Pereira da; Furlani, Carlos Eduardo Angeli; Nagaoka, Alberto Kazushi; Reis, Gustavo Naves dos

doi:10.1590/s0103-84782005000200018

Cited by 7 publications

(12 citation statements)

References 2 publications

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“…The specific consumption for different ballasts was not significant. These results disagree with those observed by Lopes et al (2005), who evaluating the performance of an agricultural tractor 4 x 2 TDA, of 89 kW (121 cv (hp)) maximum engine power, pulling a drag scarifier combined with a harrowing roller and cutting wheels with seven angled straight rods and ferrules without wing with 7 cm wide, the lowest specific consumption found with ballasting being 75% of water in the tire. For consumption per area the result of variance analysis was significant for the working depth factor, being greater in depth of 0.40 m result that may be associated with greater ground area mobilized by scarifier rods and also by higher tensile force required by the equipment to overcome the resistance offered by the soil.…”

Section: Resultscontrasting

confidence: 94%

“…It can be observed in the unfolding of the ballasting in the depths (C) that the only one that differed significantly was L1, corresponding to 0% of liquid ballast, with the lowest value in the depth P3 (0.40 m) a result that may be associated with higher slippage of the tractor in that same treatment that contributed to reduce the speed and consequently lower the overall work rate. Lopes et al (2005) evaluating the performance of a tractor on red eutroferric Oxisol also found that the field capacity was lower when he worked without liquid ballast in the tire. According to the values presented for the unfolding of the depths within the ballasting (D), it is observed that only the depth P3 (0.40 m) shows significant difference with lower values in the evaluated ballasting L1 and L2 (0 and 75% water), a result that can be associated with the fact that greater working depth mobilize greater ground area P1 -0.26; P2 -0.32 and P3-0.46 m 2 respectively, contributing for speed reduction, directly affecting the overall work rate.…”

Section: Resultsmentioning

confidence: 99%

“…Compagnon et al (2013) on evaluating the performance of the tractor-scarifier assembly in two different depths, concluded that the greater the depth of the scarifier work, the greater the increase in consumption and operating time, fuel tensile strength, power, and slipping of the bar and front wheeled of the tractor. Lopes et al (2005) evaluated the tractor performance depending on the type of ballast, tires and working speed and concluded that the combination of ballast condition and the range selected for output variables in the bar and effective field capacity, allowed the tractor to work more efficiently at the speed 4.57 km h -1 in the tillage operation with the scarifier.…”

Section: Introductionmentioning

confidence: 99%

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Operating and energetic performance of the assembly tractor-scarifier in different liquid ballasting and working depths

Santos¹,

MendonÃ§a²,

Santos³

et al. 2016

Afr. J. Agric. Res.

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The working depth and ballasting are factors that can influence directly the operational and energy performance of a mechanized set. The objective of this study was to evaluate the operational and energetic performance of the set tractor-scarifier, working at three depths under two ballasting conditions. The study was conducted in the experimental area of mechanization of the Department of Agricultural Engineering at the Federal University of Ceará in Fortaleza. The experimental design was of randomized blocks in a factorial scheme 2 x 3, with four replications, with two liquid ballasting (0 and 75% water) and three working depths (0.15; 0.30 and 0.40 m). The parameters evaluated were the soil water content, periodic and specific consumption of fuel, the overall work rate, slipping of the front and rear wheels of the tractor, travel speed, specific operational resistance, mobilized and lifting area, blistering, strength and power in the drawbar. The ballasting with 75% of water associated with a lower depth provided greater operational field capacity, lower demand for strength and power in the drawbar with lower fuel consumption by area.

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Section: Resultscontrasting

confidence: 94%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Operating and energetic performance of the assembly tractor-scarifier in different liquid ballasting and working depths

Santos¹,

MendonÃ§a²,

Santos³

et al. 2016

Afr. J. Agric. Res.

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“…Assim Levien (1999), utilizando-se do mesmo trator, escarificador e tipo de solo, operando a uma profundidade média de 17 cm, encontrou valores inferiores para os parâmetros: velocidade média (2,62 km h -1 ), força média de tração (38,22 kN), potência média de tração (27,78kW) e capacidade de campo teórica (0,73 ha h -1 ). Enquanto Lopes et al (2005), utilizando-se também do mesmo trator, tipo de pneu e trabalhando com o escarificador composto de 7 hastes, com uma profundidade média de 30 cm, constataram uma potência média inferior a 22,66kW. A potência encontrada nesse estudo foi de 33,21 kW, pois o mesmo trabalhou com uma velocidade maior 3,18 km ha -1 .…”

Section: Profundidadeunclassified

“…Os autores obtiveram valores superiores para força e potência média de tração. Na operação de gradagem pesada Lopes et al (2005), utilizando-se trator JD 6600 encontraram valores semelhantes para a grade pesada, não diferindo da capacidade de campo teórica encontrada no presente trabalho que foi de 1,12 e 1,10, pois os referidos autores encontraram valores acima de 1,01 ha -1 .…”

Section: Profundidadeunclassified

Caracterização física do solo e desempenho operacional de máquinas agrícolas na implantação da cultura do sorgo forrageiro

Rodrigues¹,

Fernandes

Nascimento

et al. 2011

Sem. Ci. Agr.

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O sorgo forrageiro pode ser cultivado em áreas e situações ambientais secas e quentes, onde a produtividade de outras forrageiras pode ser normalmente antieconômica. O objetivo do trabalho foi analisar o desempenho operacional de máquinas agrícolas na implantação da cultura do sorgo forrageiro em quatro sistemas de preparo do solo: semeadura direta; gradagem pesada + semeadura; gradagem pesada + duas gradagens leves + semeadura; cultivo reduzido + semeadura e quatro velocidades de semeadura: 3, 5, 6 e 9 km h -1. O experimento foi instalado em condições de campo, na FCA/UNESP, Campus de Botucatu -SP. Os dados obtidos foram submetidos à análise de variância em esquema fatorial simples, 4 x 4, sendo o delineamento experimental em blocos ao acaso com parcelas subdivididas. Foram estudados o desempenho operacional das máquinas agrícolas, as características físicas do solo, o teor de água e a produtividade de massa seca e verde do sorgo. Concluiu-se que o desempenho operacional de máquinas agrícolas na implantação da cultura do sorgo forrageiro é influenciado pela velocidade de semeadura e pelo sistema de preparo do solo. O escarificador foi o equipamento que exigiu do trator a maior força média de tração, potência média de tração, patinagem e apresentou a menor velocidade média de trabalho para os sistemas de preparo estudados. O sorgo forrageiro apresentou maiores produtividades no sistema de semeadura direta na velocidade de 5 km h AbstractForage sorghum can be grown in areas presenting dry and hot environmental situations where the yield of other grasses can often be uneconomical. The objective of this study was to analyze the operating performance of agricultural machines in the deployment of sorghum forage in four tillage systems, as follows: no-tillage system, disk harrow + seeding, disk harrow + two light disking + seeding, minimum tillage + seeding and four seeding different speeds, as follows: 3, 5, 6 and 9 km h -1 . The study was performed under field conditions in FCA / UNESP, Botucatu County, SP, Brazil. The data were subjected to variance analysis in a simple factorial 4 x 4, and a random block design with split plots. Operational performance of the agricultural machinery, physical characteristics the soil, its water content and the yield of dry matter and green sorghum were determined. The operational performance of agricultural machines in the deployment of sorghum forage is influenced by the sowing speed and the soil tillage system used. Chisel plow was the equipment that required the highest mean traction force, mean traction and slip, as well as the lowest mean speed for the studied tillage system. Forage sorghum

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Operational and energy performance of the tractor-scarifier assembly: Tires, ballasting and soil cover

Lopes

Chioderoli

Monteiro

et al. 2019

Rev. bras. eng. agríc. ambient.

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The heights of tire claws, tractor ballasting and soil cover can influence the operational and energy performance of the tractor-scarifier assembly. The objective of this study was to analyze the operational and energy performance of the tractor-scarifier assembly as a function of the heights of the tire claws, ballasting and rolling surface. The experiment was conducted at the experimental area of the Fazenda Experimental do Vale do Curu of the Universidade Federal do Ceará in Pentecoste municipality, CE, Brazil. The experiment was carried out in a randomized block in a 2 × 2 × 2 factorial arrangement with four repetitions. The treatments comprised two tire claw heights (T1-28% and T2-100%), two ballasts (B1-100% of solid and 75% liquid weights and B2 - 0% of solid and liquid weights), and two soil surfaces (S1 - soil with 4200 kg of straw ha-1 and S2 - mobilized soil). Worn tires provided a lower bar force (12.88 kN) and power requirement (20.06 kW) and a greater effective and operative field capacity of the tractor-scarifier assembly. The lowest slippage of the front wheels of the tractor was recorded for the worn tires (4.81%).For the rear wheels, slippages were found on the new tires (10.96%), and a higher speed of displacement was found for worn tires (5.54 km h-1). Lower specific fuel consumption was found for the mobilized soil (534.68 g kWh-1); furthermore, the hourly consumption of fuel and the consumption per area were not significantly affected by the treatments analyzed.

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Desempenho de um trator em função do tipo de pneu, da lastragem e da velocidade de trabalho

Cited by 7 publications

References 2 publications

Operating and energetic performance of the assembly tractor-scarifier in different liquid ballasting and working depths

Operating and energetic performance of the assembly tractor-scarifier in different liquid ballasting and working depths

Caracterização física do solo e desempenho operacional de máquinas agrícolas na implantação da cultura do sorgo forrageiro

Operational and energy performance of the tractor-scarifier assembly: Tires, ballasting and soil cover

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