Modification of a machine for chopping rice straw using circular saw (original) (raw)
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DEVELOPMENT OF RICE STRAW CHOPPER
A prevailing machine suitable for different kinds of crop residues was selected for development to improve its performance and productivity to be suitable for chopping rice straw. The idea of development of the original machine is supplying a new pre-cutting device to help the main machine to reduce the required time to chop the rice straw to the suitable cutting length. This device would improve the performance and increase productivity of the original machine. The pre-cutting device was a rotor with 11 flanges and equipped with 4 straight blades for each flange. Each blade was fitted to the flange by 3 screw bolts, which were arranged in a spiral In an experiment on fresh rice straw to test the performance of the machine and the optimum values of affecting parameters, the original machine failed to chop rice straw and faced clogging many times, while the prototype machine gave the best result at 2000 rpm and the productivity was 0.95 ton/h at 14% moisture content and straw was at desirable, processable and compostable lengths. The costs of cutting one ton of rice straw was 19.6 LE which was cheaper than that obtained from the original one.
A combined machine for collecting and chopping rice straw
Heliyon
Due to the recent high prices of livestock feed in the world and the new sustainable management practices of rice straw, livestock farmers are obligated to either use or purchase rice straw and cut it to desired lengths to feed ruminants. Therefore, this study aimed to construct a combined machine for collecting and chopping rice straw for lengths preferred in feeding ruminants. The combined machine comprises three main units: a picking up unit, a chopping unit, and a takeout unit. Field experiments were performed on average rice straw moisture content of 25% (w.b.) to evaluate the performance of the combined machine, under factors of 1.3, 1.6, 1.9, and 2.2 km h À1 forward speeds, elevator velocities of 0.79, 0.94, and 1.10 m s À1 , and chopping knives rotational speeds of 1600, 2000 and 2400 rpm. The obtained results indicated that the consumed specific energy was 90.94 kWh ha À1 to achieve the highest field capacity of 0.24 ha h À1 , with collecting efficiency of 95.30% at a forward speed of 2.2 km h À1 , elevator velocity of 1.10 m s À1 and rotational speed of 2400 rpm for chopping knives. In order to achieve the highest chopping quality of 95%, it is recommended to operate the elevator velocity at 0.79 m s À1 , rotate chopping knives at 2400 rpm, and drive the tractor at a forward speed of 1.3 km h À1. The total operating cost of the combined machine is lower than the traditional methods by about 49.84%.
DEVELOPMENT OF A MACHINE FOR CHOPPING WOOD RESIDUES
Wood Research, 2021
CAD software and FEM analysis were used to modify the drum of threshing machine into machine for chopping wood residues. The operating parameters that affecting the performance of the chopping machine are drum speed (450, 1000 and 1200 rpm), three stages of serrated disk arrangement clearance between drum flail knives (0.7, 1.5 and 3 cm) and three levels of feeding capacity (W1 300, W2 = 360 and W3 = 420 kg. h-1). The developed machine was operated by the addition of two types of knives (sharp free knives + serrated discs) to the original knife existing already in the machine. The machine was evaluated in terms of production capacity, cutting efficiency, power requirements and energy consumption. Using the modified (serrated) saw disk mill and flail knives reduced the energy requirement for chopping and raised fine degree of the chopped materials and solve the clogging problem. The cutting productivity and cutting efficiency raised with reducing the clearance between flail knives (0.7, 1.5 and 3 cm) while the power requirements and energy consumption reduced.
A Review on Design of Multi–purpose Cutting Machine for Agricultural Uses
International Journal for Research in Applied Science and Engineering Technology, 2022
India is an agricultural country. In which 65% people are farmers. As, the population of india is increased, the demand of food is also increasing. In these circumstances, we need a fast cutting process instead of traditional cutting methods. In the past, agricultural activities were carried out with manual force. But today in most of our country there is a shortage of manpower; therefore labor is not available when required. So the labour cost for cutting of sugarcanes seed, groundnut and straw cutting only skilled labours are required. To minimize the labour cost and to get work done in minimum, time at cheap cost this machine is designed. It is simple in construction. It does not need skilled labour
Design, development and performance evaluation of small-scale fodder chopping machine for farmers
Research in Agricultural Engineering
A straw chopper is a mechanical device used to uniformly chop fodder into small pieces to mix it together with other grass and then feed it to livestock. The objective of this research was to design and develop an animal fodder chopping machine to be utilised by dairy farmers within their purchase range. The drawing of these machine parts was undertaken in AutoCAD software and the construction was performed in a local workshop. After development of this machine, performance tests were carried out on a farm. The chopping machine tests were carried out with commonly grown fodder (namely: straw, grass, and maize) in Bangladesh. The performance evaluation of the developed machine was carried out in terms of the chopping efficiency, machine productivity, and energy consumption. The economic analysis of the straw chopping machine was assessed by indicating the cost effectiveness to the poor farmers. Analysis of the data in regard to chopping efficiency and machine productivity varied from...
ZANCO JOURNAL OF PURE AND APPLIED SCIENCES, 2020
Wheat straw is a valuable by-product of grain harvesting in Kurdistan region basically for livestock feeding. It is thrown behind the harvester on the ground in different forms like heaps, windrows or spread in the field. Straw collecting in the field needs a lot of labor; it is also a costly and time-consuming operation. Recently, there has been a new operation in the field of straw chopping machines which picks up the straw from the ground, cuts and blows it to a trolley and all of this in one operation. This study was conducted to find the effect of some operational factors on the machines performance. The results show that collecting the straw as windrows in the field by the straw chopping machine gives better performance than the heaps. A tractor with 72 HP is sufficient for operating the straw picking-up and chopping machine with a trolley behind. Five different forward speeds (S1=3.12, S2=4.22, S3=5.21, S4=6.31 and S5=7.51) km/h were examined for straw picking-up and chopping as windrows to find their effects on the performance of the machine, it was found that with S3 or S4, the machine shows the best performance in terms of fuel and time consumption, throughput capacity, straw recovery, throughput efficiency and acceptable slippage percentage.
DESIGN AND ANALYSIS OF CROP CUTTER
This title presents the concept for design and analysis of crop cutter. The crop cutting is important stage in agriculture field. Currently in India former used conventional method for the crop cutting i.e. the conventional method for crop cutting is as manually cutting using labour but this method is lengthy and time consuming.This project aim is to design and analysis of small field crop cutter machine for small height crop. To analysis cutting rollerand horizontal cutting blade by using Pro-eand anises software. The machine consists of petrol engine to operate cutting roller and blade. When compare to manual crop cutting by and this machine has a capacity to cut the crop in faster. This machine to helpful for both the small as well as big farm.
Design and Production of Rotary Type Machine for Chop Up Organic Waste Plantation
MATEC Web of Conferences
Agricultural organic waste chopping machine are tools that can be used to chop leaves, twigs and could be used to help farmers in processing of the agricultural disposal products such as stalks and corn stalks, cassava stems, rice stalks in order to accelerate farmers in processing of those disposal in order that the plantation land can be prepared immediately for subsequent cultivation, as well as the chopped products can be reused for various purposes such as animal feeds and composts fertilizer. The research of this engineering method is carried out with the following stages: (1) study of the characteristics of several organic wastes to be enumerated, (2) analysis of the Chopping machine elements, consists of Chopping Blades, the house of the chopper blades, hopper, frame and transmission system. (3) A Prototype chop up mechanism manufacturing. And (4) Functional testing machine. The Copping Machine design resume as follows: Production capacity of enumeration 220 kg / hour. The cutting mechanism uses 2 static blades and 6 rotary blades. Transmission system using Belt-Pulley mechanism. The 24 Hp Diesel engine is used.
Design modification of conventional wheat straw chopper
Agriculture has straight and indirect contribution to boost the economy of Pakistan.wheat and paddy are among the major rotational crops of Pakistan. The straw management in combine harvested in wheat fields is a major problem. In the past the residual wheat straw in convectional harvesting was burnt in the field which resulted lossesof 80% of Nitrogen, 25% P, 21% K and 4% to 60% S.To overcome this problem, locally available wheat straw chopper is used for cutting and collecting the wheat straw left behind the combine harvesters. These locally developedwheat straw choppers are heavy in weight having lowermachine efficiency. A wheat straw chopper has beenmodified using locally available materials making it light weight and more efficient. The performance evaluation of wheat straw chopper has been carried out in the field and further improvements have been incorporated to increase its field efficiency. The modified wheat straw chopper has been tested for its performance at Chakra Farms of the University of Agriculture, Faisalabad during the wheat harvesting season. The experiment was consisted of factorial completely randomized design. Three wheat varieties V1 (Sehar-2006), V2 (Lasani) and V3 (Faisalabad-2008) were selected in which modified wheat straw chopper was operated at two different tractor forward speeds S1 (1.77 km/h) and S2(2.42 km/h) and at two different levels of moisture contents M1(moisture at the same day of combining), M2(moisture after one day of combining). Results showed that wheat straw yield (kg ha-1) for V1, V2 and V3 was found to be 1425, 1118 and 1179 kg/ha respectively. Effect of moisture on wheat straw yield (kg/ha) was found to be significant, and higher wheat straw yield (kg/ha) was found to be at moisture content level M1.The wheat straw yield and efficiency of the wheat straw chopper was found to be higher at S1(1.77 km/h) which is for wheat variety V1 and 67.96% respectively.The average fuel consumption was found to be 9.3 L/ha.Breakeven point of the wheat straw chopper was occurred at 225 hours of use.
Design and Fabrication of Multi-Purpose Cutting Machine for Agricultural Uses
International Journal for Research in Applied Science & Engineering Technology (IJRASET), 2022
As agriculture is one of the main occupations in India, it is very essential to discover and implement new ideas in this field, although a lot of work has been done in this area. It is a pity that these ideas are not properly implemented in the real field. This is due to the high cost and difficult for the rural population. Multipurpose agricultural cutting equipment is the basic and main equipment involved in agriculture for maximum performance. The conventional method of planting and growing crops is a laborious process, and therefore there is a shortage of manpower, resulting in a delay in agriculture to overcome these difficulties. Multipurpose agricultural equipment is designed. Agriculture plays a vital role in the Indian economy. Over 70% of rural households depend on agriculture. Agriculture is an important sector of the Indian economy, contributing approximately 8.4% to the total GDP and providing employment for over 60% of the population. Indian agriculture has experienced impressive growth over the past few decades.