关键词: 香蕉秸秆, 粉碎还田机, 粉碎刀片, 静力学分析, 动力学分析

Abstract: A selfpropelled banana straw crushing and returning machine was designed to solve the problems of winding and poor crushing effect of banana straw crushing implements in the operation process in Hainan Province. The working process of machine was expounded, and the theoretical analysis of the feeding device and the crushing device was carried out to determine the operating parameters of the devices respectively. The results of the static analysis with ANSYS showed that the maximum equivalent force of the crushing knife under normal operation was 260.91 MPa and the maximum deformation was 0.159 88 mm, which was lower than the maximum yield strength of the tool material, and could ensure the reasonability and applicability of the machine. The dynamic simulation test of the crushing process was carried out, the linear speed of the knife and the cutting angle were selected as the test factors, and the maximum stress and energy loss on the straw were the evaluation indexes. The results showed that the optimal parameter combination was that the linear speed was 30 m/s, the cutting angle was 15°, and the maximum stress on straws was 12.885 2 MPa, the energy loss was 3.50 J. The research results can provide theoretical reference for further optimization design of the machines, and provide technical reference for the development of intelligence banana straw crushing and returning to the field.

Key words: banana straw, crushing and returning machine, crushing blade, static analysis, dynamics analysis