06-09-2016, 11:19 AM
Theoretical study on spiral sugarcane-lifting mechanism of sugarcane harvester and virtual prototype simulation
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This paper tries to put forward a new method to study the acting process between sugarcane and spiral sugarcane-lifting mechanism of sugarcane harvester. Based on vegetal state and the inherent mechanics performance of sugarcane in field, a physical model of sugarcane was developed in this paper applying Finite Element Method. Based on this model, the theory of interacting process between spiral sugarcane-lifting mechanism of sugarcane harvester and sugarcane was established in this paper. This paper established the theoretical equations of all key parameters. Applying the theory, a Virtual Prototype(VP) system of interacting between sugarcane-lifting mechanism and sugarcane was developed. Most key parameters of structure and dynamics of sugarcane-lifting mechanism are included in this VP system. Virtual tests were carried out. The influence of key parameters on sugarcane-lifting were studied. Some new phenomena were found in simulation and test. These new phenomena can be interpreted well applying the theory deduced by this paper. Based on he theoretical research and simulation, a new sugarcane-lifting mechanism was designed. After the theoretical research and simulation, high speed photography test was carried out in sugarcane harvesting. The test result is satisfactory.
Study on the Cutting Mechanism of Sugarcane Stem
LIU Qing-ting1, OU Ying-gang1, QING Shang-le2, WANG Wan-zhang3 (1.College of Engineering, South China Agricultural University, Guangzhou 510642, China; 2.Hunan Engineering College, Xiangtan 411101, China; 3.Mechanical and Electrical College, Henan Agricultural University, Zhengzhou 450002, China)
The sugarcane is one of the main economic crops in China. However, the sugarcane harvester has the disadvantages of irregular cutting stubble, high head-broken rate, and great losses, which badly influence the properties of sugarcane harvester and its application. Hence, this paper summarizes the research results in the internal or external, including the physics and mechanics characteristics of sugarcane’s stem, cutter, blade, and the cutting theory. This paper also puts forward to research the cutting mechanism by combining the material characteristic of sugarcane’s stem with its physics and mechanics characteristic, which has more scientific. The result shows that the computer simulation technology is an effectual way to study the cutting mechanism of sugarcane’s stem.
【Key Words】: agricultural engineering sugarcane stem summary characteristic of mechanics cutting mechanism
Experimental research on factors affecting the cutting quality of sugarcane cutter
Yang Jian1, Liang Zhaoxin2, Mo Jianlin2, Wang Rugui1, Gu Meiying2(1.College of Mechanical Engineering, Guangxi University, Nanning 530005, China;2.Guangxi Zhuang Autonomy Research Institute of Agricultural Machinery, Nanning 530001, China)
To decrease the broken root rate of sugarcane cutter in cutting sugarcane (summarized as broken rate below), and to increase sugarcane cutter cutting quality, the authors carried out test-bed trial, established mathematics model, studied the factors affecting the cutting quality of sugarcane cutter, at the same time, synthetically optimize the factors affecting the cutting quality of sugarcane cutter. The results show that trial factors have great effects on cutting quality, and the optimized results can decrease broken rate efficiently. When sugarcane is cut in dry or wet field, the broken rate is less than 14 percent.
A Kinematic Model of the Dual Basecutter of a Sugar Cane Harvester
Abstract
A model has been developed which describes the basecutter kinematics of the dual basecutter sugar cane harvester. The model calculates the maximum permissible velocity ratio (forward speed/disc rotational speed) to maintain total blade coverage of the cane crop and to prevent contact between the discs and uncut stalks, for a given set of basecutter and crop parameters. The model is used to investigate the effects of variation in the crop parameters on the maximum permissible forward speed of the harvester. Within reasonable limits of sugar cane crop parameters and to avoid disc contact, the maximum harvester forward speed in a narrow row of loosely supported thin stalks is over double that for a wide row of firmly held thick stalks.
Adaptability of small-sized sugarcane harvesters in Okinawa
Abstract
Small-sized sugarcane harvesters (SSHs) were field-tested to evaluate their performance and adaptability with the aim of improving their operation under wet conditions caused by frequent rain during the harvesting season. SSHs performed better than larger machines in wet fields, harvesting 120 t/ha of yield and lodged sugarcane. Harvesting losses with SSHs were almost the same as those with middle-sized harvesters (MSHs) in small fields with narrow headlands. Stool damage, stools pulled out and extraneous matter in wet fields where SSHs were used were lower than those where MSHs were used. In addition, SSHs can work in the narrow row spacing, resulting in increased productivity. Overall, it was shown that SSHs were highly adaptability in the wet sugarcane fields of Okinawa.
Paper Title:
Optimal Design for Cutting Mechanism of the Sugarcane Planting
Abstract
In this paper, mainly according to the selection of sugar cane seeds and the quality requirements for cutting, we design a cutting mechanism not only to cut off the sugar cane , but also can ensure the cutting sugarcane planting to achieve the agronomic requirements for sugar cane . The institution's overall ideas are as follows: first,measure different kinds of sugar cane planting in different cutting force and cutting speed in case of broken head.After preliminary analysis,gain cutting force,cutting speed ,the diameter of sugar cane ,the species of sugar cane ,cutting blade edge angle, cutting angle and cutting mode correlation.Then select the power transfer device and the working parts of the disk and blade according to the obtained data.Last design drive of belt wheel, drive shaft, bearing type, bearing cover through calculation and checking.The successful design and development of the institution of sugar cane cutting mechanism will be able to greatly reduce the labor intensity and production costs in the process of sugarcane planting.
Y. Z. Li, Q. Zhou, W. Wang, W. He, L. J. Jiang, "Optimal Design for Cutting Mechanism of the Sugarcane Planting", Applied Mechanics and Materials, Vols. 271-272, pp. 589-593, Dec. 2012Paper Title:
The Calibration of Key Parameters for Sugarcane Harvester Basecutter
Abstract
in order to calibrate the critical work parameters and structure parameters impacting the broken rate in the working of sugarcane harvester cutter, we establish the kinematics model of the cutter. analyse the matching conditions of running speed and cutter speed, the mechanism of the structural parameters in working . We use cubic regression analysis to establish the mathematical model associating the broken rate and the parameters and we discover the running speed play a dominant role. For the model ,we use the PSO (Particle Swarm Optimization) to obtain the optimal value of the parameters and research how the working parameters impact the broken rate under the optimal structural parameters. Finally, the field test of the prototype proves that the broken rate can be reduced to 2.12% under the optimal parameters.