Structure parameter design and bench test research of paddy field blades

Abstract

Aiming at the problems of high labor intensity and low efficiency in manual operation during the pulping process of rice seedling nursing in thin mud in hilly and mountain areas, this paper designed a new type of paddy field blade for seedling nursing, and utilized a rice nursery pulper to help manual operation complete the pulping process. It created a mathematical model of mud-throwing mass and operating power in the operation process of paddy field blade, and obtained the main structure factors that influenced the mud-throwing mass and operating power of paddy field blade, which included the area of mud splashing board, the angle between the front cutting edge and the mud splashing board, and the inclination angle between the front cutting surface and the mud splashing board. To further analyze the degree of influence of the blade’s main structure parameters on mud-throwing mass and operating power, it used EDEM discrete element simulation software to establish a discrete element simulation model of paddy field blade and mud particle system, performed simulation analysis with the method of orthogonal experimental design, and conducted a bench test for comparison. The results showed that: (1) the degree of influence of the three structure parameters on mud-throwing mass and operating power from large to small in order was the area of mud splashing board > the inclination angle between front cutting surface and mud splashing board > the angle between front cutting edge and mud splashing board; (2) the maximum relative error for mud-throwing mass between simulation analysis and bench test was 4.53%, and that for operating power was 8.67%; and (3) three reference parameters combinations were selected by P2-1/M2 graph, the mud-throwing mass of the three combinations was 40.43%, 27.52% and 0.16% higher than that of the original blade, and the power consumed was 13.99%, 21.83% and 36.65% lower than that of the original blade, indicating that the new paddy field blade had good operating performance.

Simulation Analysis and Optimization Design of Paddy Field Mud Spreader Blades for Uniform Dispersion

“…However, it should be noted that mud spreader blades possess structural characteristics that differ from commonly used agricultural machinery blades; thus, their operational characteristics when interacting with mud exhibit distinctions from ordinary blades. Consequently, a series of studies on technical aspects and methods for utilizing paddy field machinery have been conducted by researchers [28][29][30][31][32][33][34][35][36][37]. Zhang, Y. et al [38] optimized the operational parameters of a weeder blade used in rice fields, and their results demonstrated that the optimized blade achieved satisfactory performance according to agronomic requirements.…”

Optimization of the Structural and Motion Parameters of Blade Cutters in Paddy Field Pulping Machines

“…In order to improve the operational performance of blade cutters, Xie Y et al [32,33] optimized the structural parameters of the blades for use in paddy fields using a CFD method, and the results showed that the optimal blade performance was greatly improved. Chen C et al [34] optimized the design of blades in rice seedling growth trays for mud homogenization through discrete element simulations. Ding Q et al [35] utilized reverse engineering technology to determine the essential geometric parameters of the pulping blade, subsequently investigating both the operational aspects and design methodology of said blade.…”