Design and experiment of separation equipment of rindpithleaf for corn stalk
1. College of Engineering, Northeast Agricultural University, Harbin, Heilongjiang 150030, China; 2. Key Laboratory of Swine Facilities Engineering, Ministry of Agriculture, Harbin, Heilongjiang 150030, China
Abstract： To solve the problems of poor adaptability and low productivity and separation rate of the existing separation equipment of rindpithleaf for corn stalk, a separation equipment of rindpithleaf for corn stalk was designed with simple structure and high reliability. The equipment was mainly composed of leafstripping, stalkspreading and pithstripping device. Combining cartesian coordinate with polar coordinate principle， the leafstripping mechanism was designed， and the pithstripping mechanism was also designed based on cutting pithstripping and dropping principles. The main affecting factors on separation performance were taken as experimental factors, and leafstripping rate and pith residue rate were chosen as evaluation indexes to carry out the orthogonal experiment by the experimental device. The results show that when the spring diameter ， the feed linear speed of feed roller and the rotation speed of leafstripping roller are respective 1.4 mm，1 m·s-1 and 700 r·min-1, and the leafstripping rate can be controlled in the optimal range. Under the conditions with the number of pithstripping knives of 6, the gap between top plate and pithstripping knives of 1.8 mm, the rotating speed of pithstripping roller of 780 r·min-1 and the installation angle of pithstripping knives of 45°, the pith residue rate can be controlled in the optimal range. According to the above optimization parameters, the experimental results of the designed separation equipment show that the leafstripping rate is 97.5%, and the pith residue rate is 2.8%. The rind is intact with uniform pith particles, which meets the operating requirements of the separation of rindpithleaf of corn stalk.
