| When facing dangerous accidents at sea,marine life-saving systems can ensure that people escape safely to sea level.Systems have attracted more and more attention from many researchers.Marine life-saving systems need to face various harsh conditions at sea.Whether it can be deployed and recovered normally depends on the performance level of the life-saving winch.Therefore,it is very necessary to design a winch with the advantages of convenient operation,high reliability,and compact structure.This carried out a series of analysis and research work.First,according to the requirements for the use of marine life-saving systems and the standards of the International Convention for the Safety of Life at Sea,the overall scheme of the winch structure is determined through comparative research,and a compact,manual-electric hybrid life-saving winch model is constructed,and further complete the motion analysis of each key module of the winch.Secondly,the dynamic model of the planetary gear transmission system is established by using the lumped parameter method,and the dynamic analysis is carried out.By investigating the displacement and deformation of the single-stage planetary gear system,a single-stage linear dynamic equation is derived and established,and further considering the damping,deformation and meshing stiffness between gears,a single-stage nonlinear dynamic equation is established.On this basis,the coupling between the various levels is considered,the multi-stage planetary gear transmission system is analyzed,and the inherent characteristics of the system are revealed.Thirdly,the kinematics and dynamics analysis are carried out using Adams virtual prototype.Through virtual prototype simulation,the speed of each component and the transmission ratio of the system are obtained,and the theoretical analysis results are verified;the simulation analysis of the release and recovery process is carried out,and the operating speed of the planetary gear transmission system and the meshing force status of each gear pair are obtained,and it is determined that it is suitable for use Claim.Verify that the change trend of the meshing force curve is the same as that of the applied load curve.Furthermore,the vibration analysis bases on Matlab and virtual prototype is carried out for the winch system under load conditions,and it is obtained that the change trend of the theory and the simulation results are the same,which verifies the stable operation of the winch.In addition,the dynamic response frequency of the system is calculated with the aid of the Vibration software,and the response frequency is compared with the natural frequency to verify whether the system is in resonance.Finally,the influence of the rigid and flexible lower ring gear on the planetary gear train is analyzed.The system dynamics coupling model is established,and the coupling model is theoretically analyzed.Using Romax Designer to define the rigid-flexible ring gear of the three-stage planetary gear system,and analyze the influence of the entire gear train.Under flexible and rigid conditions,obtain the maximum bending stress of each gear,the maximum contact stress of the tooth surface,the gear contact safety factor and the bending safety factor values,and compare the influence of the maximum value under different conditions;verify the displacement of each gear and planetary gear under flexible and rigid conditions. |
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