| Friction hoist system plays an important role in the production of many coal mines in China.With the deepening of coal mining depth,the use of multi rope friction hoist is more and more widespread.The utility model relates to a new rope replacing device for a wire rope,namely a fast rope changing device driven by potential energy.It is characterized by the use of energy conversion.It will be the gravitational potential energy into hydraulic energy to reduce energy consumption and the effect of heating system.Through the industrial test,it is proved that the device can finish the task of replacing the wire rope smoothly and safely.As a professional rope changing device for mass customization,in order to improve the safety detection means,improve the performance of the plant,improve the efficiency of the experiment and get the reliable parameters of the device,at the same time,in order to provide a reference for the fault diagnosis of the rope equipment,as well as the subsequent optimization of the equipment to help,this paper designs a set of experimental platform for the new potential energy driven rope changing device.The experimental platform can complete all kinds of tasks,such as data acquisition,rope movement monitoring,product inspection and so on.The experimental platform can ensure that the parameters of the rope changing device reach the optimum state when they arrive at the site and achieve the purpose of safe rope change.This paper first introduces each component and working principle of the fast changing rope device driven by potential energy.Through the field test,the rope winding device and the potential energy drive link have a more profound understanding.On this basis,the initial scheme of the experimental platform is put forward.The scheme makes full use of the resource of the rope changing device so that the step cylinder assembly of the experimental object,namely the rope changing device,can be well connected with the experimental cylinder of the experimental platform.This can improve the efficiency of the experiment.In order to detect the initial program function,the three-dimensional model of mechanical system is established.The dynamic simulation model is established by using ADAMS software and the hydraulic simulation model is established by AMESim.The mechanical and hydraulic simulation is carried out by two software.The simulation results are as follows the initial scheme can achieve the expected function,the effects of different thrust and operating time on the experimental platform are different and when the running time is the same,the greater the thrust,the more obvious the system vibration and at the same time,the shorter the running time,the more obvious the vibration of the system.In this paper,a reasonable running time interval corresponding to the weight of the rope in the rope changing operation is given.It can be seen from the dynamiccharacteristic curve that the overall performance of the experimental platform needs to be improved.In order to improve the overall performance of the experimental platform,this paper proposes the use of electro-hydraulic proportional technology,feedback control technology to optimize the experimental platform.Through the establishment of the mathematical model of the optimization scheme,first of all,we have a deep understanding of the optimization scheme in theory.The control simulation model of optimization scheme is established by using Simulink software.The model is combined with the hydraulic simulation model for hydraulic and control simulation.The simulation results show that the overall performance of the experimental platform has been greatly improved.In the operation speed and operation stability performance is particularly evident.The operating speed of the experimental platform is more than 160mm/s and the maximum acceleration value is 0.045m/s2.Through optimization,the experimental platform can basically achieve the expected function and performance in the initial design stage. |
PDF Full Text Request