Dynamic Performance Research And Structural Optimization Of Dual-channel Aseptic Brick Packaging Equipment

In recent years, aseptic brick package foods get more and more favour of the consumers.However, due to the monopoly of foreign multinational and lack of research on high-speedaseptic brick package technology, resulting in a costly domestic food aseptic brick packages,restricting the healthy development of aseptic brick package industry.In this paper, based on dual-channel devices aseptic brick package, it mainly studied thedynamic performance of the sealing mechanism, the dynamic performance of suction bagmechanism and dynamic performance of rack and camshafts.Firstly, dynamic performance of the sealing mechanism was analyszd by dynamic finiteelement method. It found that the axis pins of driving shaft and driven shaft and the segments1of driving shaft and driven shaft have structural strength problems. The exsiting problems ofsealing mechanism were optimized by MIGA and NLPQL hybrid optimization strategy, and itobtainned the optimal sealing mechanism model which could enhance the structural strengthand reliability. Also, the disc spring buffering mechanism was designed to ease the shock ofsealing mechanism.Secondly, dynamic performance of spatial suction mechanism was studied by kinematicsmethod. In ADAMS software, combined with reverse theory and lines planning theory, itachieved the inverse kinematics of the cam profile by planning suction head time history withquintic polynomial curve. Through a series of experiments, choosing the optimum cam profileof the issue based on the pressure angle and radius parameters of the reversed cam profiles,and the paper studied the kinematic characteristics of the reversed cam profiles. It alsocompared the former cam profile with the optimized cam profile on kinematics, and the resultshowed that the optimized cam profile were smoother and more precise during themovements.Then, based on Virtual Prototyping, corner feature of suction head was discussed. Itrevealed the relationship between the connecting rod5and6and the initial angle and endangle of suction head. The relationship showed that the connecting rod5should be adjustedfirst to get a proper total corner angle, and then fine-tune the connecting rod6to obtain thedesign requirements of initial angle and end angle during the assembly. The research can helprealize assembly process scientifically and prevent blindness.Finally, the dynamic performace of the rack and camshafts of the machine was analyzed.On the basis of the mode theory, the reseach on vibration characteristic of the rack was undertaken.Vibrational modes and natural circular frequencies of the rack, steel plate1, steel plate2and combinations thereof were obtained. By comparison with the operating frequency, it wasfound that the natural circular frequencies were all far away from the operating frequency andthe resonance would never occur. In addition, the paper obtained the structure forceparameters of the camshafts and rack bearing with the help of ADAMS. Then the finiteelement analysis of the camshafts and rack bearing was under taken by loading the force dataonto the models. The result found that the steel plate2of the rack had hidden danger at work,and strengthen the structure by increasing the support beam at the dangerous part. The results of camshafts showed that the two transmission shafts had no trouble in insufficient structuralstrength.