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Jin X.,Henan University of Science and Technology | Du X.,Henan University of Science and Technology | Geng G.,Modern Agricultural Equipment Co. | Ji J.,Henan University of Science and Technology | And 2 more authors.
Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery | Year: 2015

In order to further improve the operation effect and stability of transplanter with chute, the guiding seedling mechanism was chosen as the research object, indoor mixed level uniform design experiment was done under the condition that the length of the connecting rod, initial phase angle of crank and velocity of the 2ZDJ-2 seedling transplanter were made as the experiment factors and lodging rate was made as the experiment indicator. Multivariate non-linear regression model between experiment factors and indicator was built by making statistical analysis of the experiment result, and the influence rule of factorial effect on experiment indicator was analyzed. Optimized solution of experiment factor combination was done within the scope of experiment data by using Matlab software, and repeated verification experiment of optimal factors combination was done. Experiment result showed that the guiding mechanism worked well when the initial phase angle of crank was 70°, the length of the connecting rod was 356 mm, and the velocity was 280 mm/s, under this condition, the erectness percentage was up to 95.5%, and the mechanism worked smoothly. © 2015, Chinese Society of Agricultural Machinery. All right reserved. Source


Bai S.,Shandong University | Zhang J.,Shandong University | Wang C.,Modern Agricultural Equipment Co. | Wang Z.,Shandong University | And 2 more authors.
Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery | Year: 2015

Based on analysis of the reason of nodal diameter transverse vibration of thin type circular saw in sawing the stone, it was found out that the wave of the wavy deformation of traveling wave on the saw edge led to the additional axial force of sawing force. The mathematical model of axial additional force was deduced by traveling wave theory in a rotating coordinate system with the same rotational speed as the diamond circular saw, and then the transverse vibration model of diamond saw blade was built by using the thin plate theory of elastic mechanics. The model was pretreated by using complex analysis theory and some proper mathematical methods. The solving algorithm for transverse vibration model and the simulation program were designed based on the Newmark method. In order to verify the validity of the model, a transverse vibration monitoring experiment was completed in the stone producing spot. The transverse vibration of two positions of the diamond saw blade was measured under different process parameters. The error between simulation result and experimental result was less than 13%, therefore, the correctness of the model was verified. The established transverse vibration model could provide theoretical support for optimization of saw blade structure, design of sawing machine tool, noise reduction in sawing process and improvement of the machining surface quality. ©, 2015, Chinese Society of Agricultural Machinery. All right reserved. Source


Wang J.,Chinese Academy of Agricultural Sciences | Dong X.,Chinese Academy of Agricultural Sciences | Yan H.,Chinese Academy of Agricultural Sciences | Zhang T.,Modern Agricultural Equipment Co. | Zeng Y.,Modern Agricultural Equipment Co.
Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery | Year: 2015

Air-assisted spraying technique research was carried out to increase pesticide efficiency and decrease pesticide loss. The spraying performance was experimentally studied on model 3WQ-3000 trailed air-assisted boom sprayer in small bell stage of corn fields. The effects of four sizes of flat fan nozzles (ST110-02, ST110-04, ST110-05, ST110-06) with air curtain on pesticide efficacy, coverage rate and loss rate were carried out. The experiment results showed that the deposition amount was large at upper part of corn canopy and small at lower part. Air curtain enhanced penetrability, deposited property of droplets and improved the uniformity of distribution at corn canopies. Air-assisted sprayer had significant influence on small size droplets VMD that the pesticide efficacy of ST110-02 flat fan nozzle with air curtain was 83% more than that without air curtain. The optimum pesticide efficacy of ST110-06 flat fan nozzle with air curtain was 41.93%. Air curtain could increase pesticide loss rate on the ground. The best loss rate of ST110-02 flat fan nozzle without air curtain was 13.05%. Compared with the conventional sprayer, the new air-assisted sprayer had better droplet coverage rate and higher penetrability, the average pesticide efficacy was improved by 144.17%, and pesticide loss rate on the ground was reduced by 14.46%. ©, 2015, Chinese Society of Agricultural Machinery. All right reserved. Source


Liu L.,Modern Agricultural Equipment Co. | Liu Z.,Modern Agricultural Equipment Co. | Yang X.,Chinese Academy of Agricultural Sciences | Li C.,Modern Agricultural Equipment Co.
Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery | Year: 2011

The 2BMG-24Q pneumatic no-till wheat planter was designed. Seeds were transported into seeder pipes with high-speed air current to perform precision metering. The wavy disc coulters were used to cut stubble for sowing, and the double disc coulters were used to open furrow for fertilizing. The test results showed that the quanlification percent of seed depth and fertilizer depth were 88.3% and 85.2%, respectively. Source


Jin X.,China Agricultural University | Li S.,Chinese Academy of Agricultural Sciences | Yan H.,Modern Agricultural Equipment Co. | Yang X.,Modern Agricultural Equipment Co. | And 2 more authors.
International Agricultural Engineering Journal | Year: 2012

The field experiment of transplanting tobacco seedling with designed tobacco transplanter was conducted. A mathematical model for co-relating the erectness percentage of block seedling with machine parameters viz. forward speed of machine, penetrating angle of planting apparatus and dip angle of press wheel was established. With the increase in the penetrating angle of planting apparatus and the decrease in the forward speed of machine and the dip angle of press wheel, the erectness percentage of block seedling increased. Parameter optimization of tobacco transplanter was carried out by using the mathematical model and single objective optimization. The optimized values found for the machine parameters are: the forward speed of machine as 0.23 m/s, the dip angel of press wheel as 17°, and the penetrating angle of planting apparatus as 10°. Source

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