Design of Rice Straw Fiber Crusher and Evaluation of Fiber Quality

Abstract

In the comprehensive development and utilization of crop straw, it is key to separate the fibers in the straw through a certain process or equipment. In order to obtain rice straw fiber material, the straw fiber crusher was designed using SOLIDWORKS software, and its grinding process was simulated using EDEM software to verify the feasibility of the machine principle and structural rationality. The grinding wheel speed, screw feed shaft speed, and grinding wheel clearance were used as test factors to design a three-factor, five-level test using Design Expert 13, obtaining a grinding wheel speed of 1250 r·min−1, a screw feed shaft speed of 40 r·min−1, and a wheel clearance 0.21 mm, which can achieve a theoretical kWh output of 45.8 kg/(kW·h) and a tensile index of 112.5 N·mg−1. We aimed to establish a model of the pore channel of the specimen, analyze the characteristics of the model within the unit area of different specimens, investigate the intrinsic relationship between the tensile index and the image pore channel coefficient of the straw fiber specimen, and to verify the feasibility and rationality of using the tensile index to evaluate the quality of straw fiber.