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| Registros recuperados: 10 | |
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| 大友, 功一; 岸本, 正; OHTOMO, Koichi; KISHIMOTO, Tadashi. |
| トラクタのけん引性能を評価するための一つの方法として, 2輪駆動トラクタのけん引効率の予測を行なった。予測精度を検討するために, トラクタの機体条件ならびに平均円すい指数からけん引効率等を予測すると共に, 土壌密度を変えた圃場でけん引性能試験を行ない実測データを収集した。けん引力およびけん引効率の実測値の予測値に対する偏差と予測最大値との比を偏差率として定義し求め, 予測精度を検討した。その結果, 全データの偏差率の平均値は, けん引力で0.07%, けん引効率で-0.29%となり, 提案モデルは高い精度で予測できることを示した。 A prediction of the tractive efficiency of a two-wheel drive tractor was conducted with tractor dimensions and average cone indexes. Experimental data in a field for the discussion of the prediction accuracy were obtained through tractor drawbar pull tests. The deviations of the measured data to the predicted one of drawbar pull and tractive efficiency were calculated，and the deviation rates which were defined as the ratio of the deviation to the predicted maximums of the drawbar pull and the... |
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Palavras-chave: トラクタ; けん引力; けん引効率; 円すい指数; 予測モデル; Tractor; Drawbar pull; Tractive effciency; Cone index; Prediction model. |
| Ano: 2000 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/2955 |
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| Azadbakht, Mohsen; Kiapey, Ali; Jafari, Ali. |
| Leaves scattered on the parks, passages, and other places have a detrimental effect on the beauty of the environment, and decrease photosynthesis, hence, the efficiency of plants. Leaves are also used in the production of peat. This makes using leaves collectors in parks, and organizations with a green space useful. Due to the fact that leaves take up a high volume, their transportation is difficult. Using the machine introduced in this paper which was equipped with a suction-blower system, increases efficiency, and at the same time decreases the costs of green space, and their workforce cost. Focusing on overcoming the mentioned difficulties, this study was carried out in order to design and produce a tractor powered leaves collector equipped with... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Leaves collector; Blower system; Suction system; Design; Power; Tractor. |
| Ano: 2014 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2850 |
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| Servadio, Pieranna; Belfiore, Nicola Pio. |
| In this paper, according to ISO 2631/1, 1997, the influence of the mechanical vibrations on human health is evaluated and assessed with four methods: the health guidance caution zones (HGCZ), the estimated vibration dose value (eVDV), the fourth power vibration dose value (VDV), a combination of various methods presented in literature. The normative refers to the HGCZ, which involves the average RMS vibration emission level and its exposure time during a given working day. Values of crest factor for the operator seat showed that Z-axis was the more solicited, even if all the crest factor values are below 9. Results of mechanical vibration in respect of comfort and health, according with the method of the HGCZ, showed that only case B, at higher forward... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agricultural Engineering; Tractors; Vibrations; Ergonimics whole body vibration; Tractor; Comfort; Health risk; Tyres. |
| Ano: 2013 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2544 |
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| Farzad Jalilian tabar; Hekmat Rabbani; Agricultural Machinery Department, Razi University of Kermanshah, Iran; Alinejat Lorestani; Agricultural Machinery Department, Razi University of Kermanshah, Iran; Payam Javadikia; Agricultural Machinery Department, Razi University of Kermanshah, Iran; Rashid Gholami; Agricultural Machinery Department, Razi University of Kermanshah, Iran;. |
| Tractors have been used for transportation on roads by many farmers in addition to use in the field operations. MF285 tractor is the popular kind of tractor in Iran (about 30% of all tractors) and almost this tractor has been used without cabin. Despite the problems caused by noise from the tractors and all its adverse effects on users and observers, no comprehensive research has been done on them. The result of this research indicate that the noise level of MF285 tractor, in 2250 r/min engine speed, will be 90 dB(A) which in comparison with the standard value, 85 dB(A), is dangerous for operator’s ears. The test site was prepared according to the international standards. The noise emitted by tractor in three gears (2, 3 and 4) and three speeds (1,500,... |
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Palavras-chave: Noise; Tractor; Sound pressure level; Ergonomics. |
| Ano: 2012 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2096 |
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| Okoko, Paul; Umani, Kingsley Charles; Onwe, David Nwabueze. |
| Selection and matching of appropriate tillage implements for a given farming operation are dependent on the data available on draft parameters for the particular tillage implement. Spring tine cultivator is one of the primary tillage implements commonly used by farmers in the study location. Performance information of spring tine cultivator is vital to enable the cost of tillage operation to be reduced. Field experiments were performed using spring tine cultivator and tractor at three tillage depths (10, 20 and 30 cm) and five tractor speeds (3.6, 5.4, 7.2, 9.0 and 10.8 km/hr) to determine the implement travel speed. The effects of tillage depth and implement travel speed on draft force, unit draft, vertical specific draft, horizontal specific draft and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Tillage; Draft; Unit draft; Specific draft; Coefficient of pull; Tractor; Spring tine cultivator. |
| Ano: 2023 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/7061 |
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| Perin,Gismael F.; Schlosser,José F.; Galon,Leandro; Rodrigues,Fabrício A.; Frantz,Ulisses G.. |
| ABSTRACT The use of fuels for agricultural Diesel engines cycle, both of mineral origin (Diesel) or vegetable and animal origin (biodiesel) can significantly alter its performance. Therefore, the aim of this study was to quantify the change in torque, power and consumption of agricultural Diesel engine fuel using minerals and vegetables fuels. It was used a tractor power take-off coupled to a magnetic brake dynamometer (for measuring speed and torque for subsequent calculation of power), and a flow meter (for measuring the hourly fuel consumption and specific fuel consumption calculation). Eleven different fuels (S10 mineral diesel with 5%, 10%, 15%, 20% and 50% biodiesel and mineral diesel S500 with 5%, 10%, 15%, 20% and 50% biodiesel, have been used pure... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Test; Dynamometer; Tractor; Torque; Power. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000100091 |
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| Afsharnia, Fatemeh. |
| The use of tractors for agricultural works showed an important role to mechanized agricultural sector. A repairable mechanical system (as agricultural tractor) is subject to deterioration or repeated failure. In this study, the regression model was used to predict the failure rate of MF399 tractor. The machine failure pattern was carefully studied and key factors affecting the failure rate were identified in five regions of Khouzestan province. Results showed that different annual use hours and maintenance policies affected failure rate. According to the data, the MF399 tractors included in 300-1000 annual use hours were commonly in a randomized breakdown period during their useful life but these tractors tend to enter the wear out period in the 1200-2000... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Failure rate; Tractor; Maintenance condition; Khouzestan. |
| Ano: 2014 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2964 |
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| Registros recuperados: 10 | |
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