Design and experiment of pea windrower equipment with TRIZ theory

In view of the fact that the current mechanization technology of pea harvesting in China is basically blank, in order to realize the matching operation of pea harvesting mechanization and reduce labor input, the first equipment of pea windrower in China was designed. The characteristics of the pea plant with the soft and creeping vines make it difficult for general machines to harvest effectively. At the same time, the machines will be blocked due to the instability of feeding during harvesting. Moreover, the plants are intertwined in the process of pea plant delivery, which is easy to form delivery blockage. These problems greatly reduce the reliability of the machine and increase the difficulty of continuous harvesting. The innovative design of pea windrower equipment was studied for filling the gap of mechanized harvesting of pea crops in China. Firstly, the characteristics of pea were studied and the problems in pea harvesting were analyzed. Then, based on the plant characteristics of pea, "substance-field model" function analysis of cutting system and conveying system was carried out based on "substance-field model" analysis method in TRIZ theory. Meanwhile, "conflict solving principle" was used to analyze and solve the contradictory conflict involved in the overall system. The appropriate solution was obtained and the main mechanism of the windrower was innovated according to the plant characteristics of pea. According to the analysis, the key components such as anti-winding reel and dithering guide plate were designed. The device can solve the intertwined and blocked problem in the harvest process and realize the efficient conveying and laying operation of pea harvester. The equipment of pea windrower was equipped with hybrid power agricultural machinery drive equipment, the usage of hydraulic system to greatly adjust the height of the header. The reel and cutter are driven by electric motor, which simplifies the mechanical transmission system and helps the agricultural machinery to develop towards the direction of energy conservation and environmental protection. Finally, based on the virtual prototype technology, the model of pea windrower was established and the prototype was manufactured. and field experiments were carried out in three experiment places of Henan Nanyang, Inner Mongolia Shangdu, Beijing Pinggu. In the process of the field experiment, windrowers showed strong adaptability, the height of cutting stubble was less than 40 mm and the harvesting efficiency reached 0.13-0.19 hm2/h. In the experiment of Beijing Pinggu, the harvest loss rate was 4.96%, the leakage sowing rate was 4.78%. The results indicated that the pea windrower could meet the requirements of harvesting in different growth stages and different growth modes with neat strips and uniform stubble, and less conveying blockage. The experiments showed that the combination of agricultural machinery and agronomy can achieve a higher level of agricultural mechanization. The study can provide reference for the mechanical equipment research of pea harvest, and it is helpful to break through the bottleneck of mechanization in the key link of pea harvest, realize the popularization and application of pea production technology in China, and accelerate the development speed and quality of pea production mechanization.