Design And Research Of A Broken Wire Rope Safety Lock

Aiming at the characteristics of nuclear island prestressed construction lifting platform,such as large load,high reliability requirements,bad outdoor working environment,this paper designed a cam self-locking rope for breaking safety locking system and based on a combination of theoretical analysis,numerical calciulation and experimental verification.The braking characteristics and cushioning characteristics of the safety locking system based on the nuclear island prestressed construction lifting platform were studied.The research results can provide technical reference for the safety locking system research type for this kind of construction lifting platform.First of all,according to the principle of protection for construction personnel and construction equipment when accidentally falling,we set up the brake technical requirements when the prestressed construction platform accidentally falls.According to the technical requirements of brake technology and knowledge of mechanical principles,a complete overall structural model of the safety locking system for prestressed construction platforms was designed to theoretically calculate the mechanical properties of key components.Finally,the assembly design is performed to ensure the correctness of the positional relationship among the components and no interference occurs between them.Based on the structural model of the safety locking system of the prestressed construction platform designed in this paper,the clamping rope groove-wire rope friction model was established to play a key role in braking performance.The experiment was designed to identify the main coefficients of the model and obtain the available parameters.Multi-body dynamics software ADAMS clamping rope groove-wire rope friction model.The ADAMS multi-body dynamics software was used to simulate the whole process of anti-creep locking and braking of the safety locking system of the prestressed construction platform.The simulation results show that the safety locking system of the prestressed construction platform designed in this paper is safe and reliable.To meet the technical specifications.By the multi-body dynamic simulation of structure,when a pre-stressed construction platform accidentally falls,during the braking process of the safety locking system,the clamping rope groove,the steel wire rope,and the cam and the like will receive a very large impact load.Therefore,this chapter based on Hypermesh and Radioss finite element solver for the static strength of the cam structure of the impact of dynamic simulation analysis,to determine the structure of the cam structure in harsh environments,the reliability of the structure.At the same time,ANSYS finite element analysis software was used to numerically simulate the impact resistance of various rubber springs and the viscoelastic materials were numerically simulated.A set of rubber spring damping combinations meeting the requirements of the technical specifications was determined.Finally,the prestressed construction platform is machined to lock the entire structure safely,and the various parts are assembled and tested.The test proves the reliability of the safety locking system designed in this paper.The drop amount measured by the test is slightly larger than the simulation,but the test values under various working conditions all meet the technical requirements.The safety locking system and design research method designed in this paper can provide reference for the design of broken rope protection device for other construction lifting platforms.