Kinematic analysis and testing of vibratory sieving mechanism for Cyperus esculentus L. harvester

In order to solve the problems of great difficulty in artificial harvesting, low harvesting efficiency, and high loss rate, a harvesting method of first threshing and then separating was put forward, and a screening device was designed for the harvesting and screening of Cyperus esculentus L.. The device was mainly composed of a threshing system and a vibrating screen sorting system. The matrix method was used to analyze the kinematic theory of the vibrating screen mechanism. The ADAMS software was used to simulate the mechanism, obtain the displacement, velocity, and acceleration graphs of each point of the screen surface, analyze the motion change law of each point, and find the key factors affecting the motion of the screen surface. This paper took crank speed, screen angle, and amplitude as test factors, screening efficiency, and loss rate as the test indexes, and used Design-Expert software to analyze. The results showed that when the crank speed was 236.51 rad/min, the screen angle was 6.7°, the amplitude was 3.98 mm, the screening efficiency was 96.56%, and the loss rate was 1.83%, which meets the design requirements of the Cyperus esculentus L. harvester.