Research On Buffer Performance Of Steel Strip Plus Rubber Type Over-volume Buffer Device

As the core component connecting the underground and the ground,the vertical hoisting system is not only related to production efficiency,but also to the safety of the workers.Although there are multiple mechanical brake devices and various electrical equipment protection in the vertical lifting system.However,over-volume accidents still occur from time to time,and the over-volume buffer device in the vertical lifting system undoubtedly provides the final guarantee for the safety and reliability of the vertical lifting system.At present,the steel strip type over-volume buffer device has been widely used in vertical lifting systems due to its simple structure and stable buffer performance,but its steel strip is easily broken when subjected to high-speed impact,thereby causing a safety accident.In response to this problem,this paper proposes to replace the steel strip buffer component of the over-buffering device with a combination of steel strip and rubber,which utilizes the elasticity,vibration absorption and buffering capacity of the rubber to reduce the buffer stress on the steel strip and improve the performance of the buffer device.The main research contents are as follows:Firstly,the plastic deformation type(steel belt type,steel belt rubber type)overvolume buffer device was taken as the research object,the structure and working principle were expounded,and the minimum and maximum resistance of the over-volume buffer device were calculated.The steel strip and steel strip plus rubber type buffer components were subjected to force analysis under over-winding conditions.According to the field investigation,the finite element simulation parameters of the buffer component and the steel strip plus rubber buffer components were drawn up,and the simulation comparison analysis was carried out.The analysis results showed that the stress on the buffer component could be effectively reduced after the rubber was added in the middle of the steel strip,and the stress on the buffer component was basically proportional to the deformation amount of the buffer component.Then,for several sets of steel strips with a certain thickness,the finite element analysis was used to simulate the buffer components of different thickness rubber and the same thickness steel strip combination;And the buffer components of same thickness rubber and sandwiched at different positions in the middle of the steel strip was simulated.The analysis results showed that the thickness of the rubber should not be too thick,andthe excessively thick rubber would increase the stress on the buffer component;The stress on the buffer component was minimal when the rubber position was about at the position slightly to the side of the dynamic pressure roller in the middle of the steel strip.Finally,the parameters of the over-volume device buffer component are designed,and the length of the buffer component,the deformation energy absorption and the braking force were calculated from the three aspects of the over-winding distance,the deformation energy absorption of the buffer component and the braking forced of the over-volume buffer device.Based on the results of force analysis and simulation analysis,the structural dimensions of the buffer components were designed and the number of buffer components were determined.Figure [49] table [14] reference [62]...