Research On The Mechanical Characteristics Of The Key Components Of The Escalator

The performance of escalators is directly related to the safety of passengers' lives and property.Most of the safety accidents were caused by fatigue failure and fracture of components.The failure of escalator components is closely related to the loads they are subjected to.In this paper,the mechanical characteristics of key escalator components were simulated.Based on the kinematics theory of chain drive and multi-body dynamics theory,the dynamic simulation model of escalator drive chain system was constructed by RecurDyn software.The simulation study was carried out under two working conditions of no-load and load,and the wear fault conditions were added.The variation rules of chain drive characteristics under normal and wear conditions were obtained.The simulation results show that the kinematics and dynamics characteristics of the chain drive system will be worse after wear,and the impact effect and dynamic load will increase.It can provide some references for the study of wear mechanism and fault diagnosis of escalator drive chain system.Static simulation analysis,modal simulation analysis,fatigue simulation analysis,harmonic response simulation analysis and topology optimization design of 600 mm,800mm and 1000 mm aluminum alloy cascades were carried out by using ANSYS Workbench software.The simulation results show that the position near the transverse support plate of cascade is relatively weak under full load condition.The simulation results show the modal frequency and modal shape of the cascade of each step.It can provide a basis for cascade design and safety detection.Based on the finite element theory of truss,the mechanical characteristics of1160 mm,1360 mm and 1560 mm escalator trusses with 35 degrees inclination under full load were studied by using ANSYS software.The natural frequencies and deformation of each step were studied.The simulation results show that the maximum deformation occurs at the front end of the horizontal section of escalator truss,and the maximum stress occurs near the support position of the upper end of escalator truss.It can provide an effective method for escalator truss design and safety detection.The dynamic simulation method of rigid-flexible coupling of RecurDyn software was used to study the dynamics of ZC1 worm gearing system for escalator.The simulation results of contact stress and bending stress of worm gear teeth were compared with those of analytical method.The results of simulation analysis are closeto the calculated values of theoretical formulas,which shows that the rigid-flexible coupling dynamic analysis of worm pairs meets the expected requirements.It can provide data support for strength checking of worm pairs.