Research On Dynamic Vibration Reduction Technology In Gearbox Of Fiber Filter Rod Making Machine Group

The gearbox, which is widely used, is regarded as one of the most basic and importanttransmission devices in mechanical equipments. With the development of mechanicalsystems towards higher speed, efficiency, precision and automation, gearbox is asked forhigher request in dynamic performance, which leads to its vibration becomes prominent,especially the resonance problem. The existing vibration reduction technologies mostlyfocus on improvements of design, machining and assembly causing resonance problemscouldn’t be solved. So that the dynamic vibration reduction technology is put forward.The gearbox of fiber filter rod making machine group was studied. Modal analysisand harmonic response analysis were used to get natural frequencies, vibration modes andthe frequency for vibration reduction. Based on the theory of dynamic vibration reduction,dynamic vibration absorber was designed and installed. Dynamic analysis was made toobtain response curves compared with those without vibration absorber to examine itseffectiveness. The nonlinear dynamic vibration reduction system was simulated and systemparameters’ effects were discussed. Dynamic vibration reduction system of gearbox wassimulated and the analysis results were compared with those obtained with FEA’s.Based on the analysis results, the first order natural frequency is confirmed as thefrequency for dynamic vibration reduction. The single-degree-of-freedom linear dynamicvibration absorber without damping has been designed. The analysis results show that thegearbox’s vibration displacement is reduced greatly proving dynamic vibration absorber iseffective. The numerical analysis results are in keeping with FEA’s indicating that thedynamic vibration reduction technology is feasible. The simulation results of the nonlineardynamic vibration reduction system show that the dynamic vibration absorber’seffectiveness can be improved by choosing appropriate parameters. The effectiveness ofdynamic vibration absorber in gearbox is improved by considering nonlinear factors.