Design and Experiment of Seed Corn Peeling Mechanism Based on TRIZ Theory

LIU Lei, LIU Lihan, DU Yuefeng, MAO Enrong, ZHANG Yan’an, YANG Fan

Abstract

Compared with field corn, seed corn peeling operation has higher agronomic requirements on the bracts peeling rate, grains crushing rate, and grains falling rate. Because of the lack of efficient and low-loss peeling means for seed corn ear, TRIZ theory combined with explicit dynamics simulation and high-speed camera technology was used to study the design method of seed corn peeling mechanism. Firstly, based on TRIZ theory, the critical structural design of the seed corn peeling mechanism was solved, and the detailed design of the peeling mechanism was completed. Secondly, LS-DYNA was used to simulate the explicit dynamics of the peeling system-seed corn ears. The movement process and stress of seed corn ears were analyzed, which verified the rationality of the peeling mechanism design. In addition, a high-speed camera test-bed was set up. Through the frame-by-frame analysis of a high-speed camera in the peeling process of seed corn and compared with the simulation results, the maximum error of speed under three working conditions was 0.035m/s, 0.066m/s and 0.095m/s, respectively, which verified the rationality of the sectional design of peeling roller. Finally, the seed corn peeling experiment was carried out by selecting the net rate of bract leaf peeling, the rate of grain breaking and the rate of falling grains as performance indexes. Under three working conditions, the test results met the performance index requirements of the seed corn peeling mechanism.

 

Keywords: seed corn, peeling mechanism TRIZ theory, explicit dynamics simulation, high-speed camera experiment

 


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