Abstract
In order to solve the problems of serious soil reflux and poor stability of ditch depth in the existing ditching organic fertilizer fertilization device in grey desert and loess orchards, rotary tillage theory and software simulation were used to conduct kinematic analysis of soil particles and ditching blade in the ditching process, and meanwhile, modeling and simulation are carried out for sand soil particles by using EDEM software, so as to determine the action mechanism of soil, blade and fairing in ditching process of grey desert and loess. The abstract on this basis, the quadratic orthogonal regression-rotation combination experiment was designed. The soil bin test was carried out by taking the cutter wheel speed, ditching depth and inclination of curved surface as the influencing factors, and the throwing distance and the stability of ditch depth as the test indexes. And it was concluded that the order of the influence of the operating parameters of the ditching device on the soil throwing distance is ditching depth > inclination of curved surface > cutter speed, and the order of the influence on the stability of the ditch depth is ditching depth > cutter speed > Inclination of curved surface. Finally, the optimized operating parameters of the ditching device are as follows: the cutter wheel speed is 119.61 r·min−1, the inclination of curved surface is 30.07°, the ditching depth is 35.52 mm, the soil throwing distance is 57.31, and the stability of ditch depth is 87.43. With these parameters as test objects, 10 groups of single factor tests were carried out to obtain that the soil throwing distance is 58.33, and the stability of ditch depth is 86.51, which were basically consistent with the expected results of the optimization test, and also in line with the relevant agronomic standards.
Highlights
For the organic fertilizer ditching device researched by the group, theoretical analysis is made on the operation trajectory and operation flow of disc-type ditchers, combined with the phenomenon of grey desert and loess backflow, the mechanism of ditching grey desert and loess throwing is studied, the critical conditions of starting throwing are analyzed, the collision between the thrown up grey desert and loess particles and the guide hood is simulated by using EDEM software to explore its collision characteristics, and the operating parameters of the ditching device are optimized according to the soil bin test to improve the operation quality
2g(h1 + lz ) + Vpy py g where, t1 is the time when the soil particles rise to the collision point after being thrown out, and t2 is the time when the soil particles fall from the collision point to the ground. h1 is the displacement in the Z-axis direction of the soil particles rising to the collision point after being thrown out. It can be seen from the above formula that the throwing distance of soil particles is related to the rotating speed of the cutter wheel and the positions of the cutter wheel blade and the soil particles in the z-axis direction
From the analysis of the movement of soil particles under the action of the deflector hood to Section 2.1.3, it is known that the throwing distance of soil particles is related to the cutter wheel speed of the cutter disc, the position of the Z-axis direction where the soil particles of the cutter disc blade are located, and the inclination of curved surface of the deflector hood, the cutter wheel speed, ditching depth, and inclination of curved surface are selected as the test factors
Summary
Upon the analysis of II S245 rotary colter’s structural parameters and its mechanism of plowing and throwing, Luo Haifeng established a mathematical model of colter’s transverse throwing and pointed out that the main influencing factors of the distance of transverse throwing were the colter’s bending angle and the friction coefficient between the colter and earth [10]; in order to track the earth’s displacement distance, Fang Huimin established a model of plowing and throwing of earth based on discrete elements and concluded that the distance of horizontal and lateral throwing of earth was increased with the higher rotation speed of colters [11]; after analyzing the plowing, smashing and throwing of earth by colters, Ren Shuguang established a differential equation of earth particles’ movement and verified the plowing and throwing process through Matlab simulation and field test, obtaining the optimal parameter portfolio for plow colters’ motion during throwing of earth [12]; Professor Jun Sakai from Kyushu. For the organic fertilizer ditching device researched by the group, theoretical analysis is made on the operation trajectory and operation flow of disc-type ditchers, combined with the phenomenon of grey desert and loess backflow, the mechanism of ditching grey desert and loess throwing is studied, the critical conditions of starting throwing are analyzed, the collision between the thrown up grey desert and loess particles and the guide hood is simulated by using EDEM software to explore its collision characteristics, and the operating parameters of the ditching device are optimized according to the soil bin test to improve the operation quality
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
