Dynamic performance analysis and experimental research of high-speed countercurrent chromatography system
High-speed countercurrent chromatograph is a kind of chromatographic separation equipment that realizes efficient and rapid purification of compounds by centrifugal movement of planetary structures.Its core structure and dynamic performance of the whole machine have a great impact on the stable operation and separation efficiency of the equipment.Based on the structural dynamics equations,the centrifuge mechanism and finite element modeling of the core moving parts of the high-speed countercurrent chromatograph are rationalized and the finite element modeled on the whole machine,and the low-order modal analysis and harmonic response analysis of the whole machine are carried out by ANSYS.At the same time,based on the noise and vibration test system,an experimental platform for dynamic performance acquisition and analysis of the whole machine of high-speed countercurrent chromatograph is designed and built,and the modal experiment of the whole machine is carried out by hammering method and compared and verified.The experimental results show that the simulation value is similar to the overall change trend of the experimental value curve,the frequency response function value at the peak and trough is in good agreement,the relative error between the natural frequency simulation value and the experimental value of each order of the first 6 steps of the whole machine is small,and the average error of the first 6th order is 3.4%.The accuracy of the dynamic modeling of the whole machine and the feasibility of the experimental scheme are proved,the structural weaknesses and optimization objectives are clarified,and the theoretical and experimental basis is provided for the subsequent structural optimization and efficiency improvement of the whole machine.
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