| In order to improve the reliability and service life of the vibration cleaning screen for grain and oilseed, and to provide theoretical guidance for dynamic experimental research and structural optimization design of the vibration cleaning screen, a virtual prototype simplified model and a finite element model of the vibration cleaning screen were established by three-dimensional modeling software and finite element software, and the modal analysis and harmonic response analysis of the whole structure of the vibration cleaning screen were carried out. The results showed that the vibration cleaning screen would not produce harmonic resonance under stable working condition, but it would produce short-term resonance in the start-up and shutdown process. Due to the short time, it had little influence on the structure and vibration of the whole machine. The maximum equivalent stress of the vibration cleaning screen in the working state occurred at the support plate between the rubber spring and the sieve body, and the conclusion was consistent with the literature measurement result. The amplitude of the sieve body was 4.11 mm. The amplitude of the front end point of the sieve body was larger than the rear end point slightly, and the difference was 2.9%. From the engineering point of view, it could be considered that the vibration cleaning screen was performing a reciprocating linear motion. |
