Research On Deformation Law Of Steel Wire Rope And Reel Of Multi-point Lifting System In Ultra-deep Mine

Ultra-deep mine hoisting system in operation,Under the influence factors such as high speed and heavy load,the length of the wire rope will be asynchronous,and then the tension difference will occur.In improving system operation,whether the parameters in the acceleration state acceleration process are set properly,whether there is any influence between the wire rope under the large tension condition on the deformation of the winding rope area of the reel.To deal with these problems,this paper is funded by the National Key Basic Research and Development Program(973 Program),“Deformation Detuning Law of Super Deep Mine Hoisting System and Synchronous Control of Parallel Drives”(Project No.2014CB049403),Taking ultra-deep mine multi-point multi-layer winding lifting system as research object,The operation parameters in the acceleration process of the ultra-deep mine hoisting system,the multi-point multi-layer lifting and lifting,the influence of the heavy load on the reel production area,the winding error and the influence of the rope-out form on the wire rope length difference were comprehensively studied.In order to provide reliable theoretical support for the design of multi-point multi-layer winding lifting system for ultra-deep mine layers in China in the future.The main research contents and results of the thesis are as follows:The similarity theory is used to prove the similar relationship between the experimental simulation platform and the ultra-deep mine test platform,and the test bench dynamics simulation platform is established.It is concluded that the speed of the ultra-deep mine hoisting system is 10 times that of the test rig,and there is a specific ratio relationship between the length and the force dimension.Therefore,the simulation results of the test bench can be extended to the ultra-deep mine hoisting system according to the similarity theory,and the mechanical and dynamic characteristics of the ultra-deep mine hoisting system under high speed and heavy load can be studied by the low-speed test bed simulation system.Based on the actual parameters of the test bench,the basic model of the test bench was established using Creo software.The Recurdyn multi-body dynamics software is used to establish the rigid-flexible coupled multi-body dynamics simulation platform of the test bench,which provides certain conditions for the study of the deformation and detuning of the mine lifting system.The rigid-flexible multi-body dynamics software was used to analyze the acceleration phase of the mine hoist system in time and space,and the optimal operating parameters of the ultra-deep mine hoist system during the accelerated operation phase were proposed.For the ultra-deep mine hoisting system,during the acceleration and acceleration process,regardless of the speed or acceleration of the hoisting system,the tension difference of the wire rope is within 10%.In the accelerated lifting phase,the maximum tension difference of the wire rope appears in the inflection point of the acceleration phase and the uniform velocity phase,Through the calculation of the dynamic tension coefficient of the steel wire rope and the parameter selection based on the similarity theory,in order to ensure the stability of the initial lifting of the lifting system,select the speed of the uniform speed.16m/s,the acceleration of the acceleration phase of 0.5m/s~2 is the most suitable for improving the motion parameters of the system.At the same time,in order to ensure the operating efficiency of the multi-rope winding type lifting system and meet the project speed running index(?18m/s),the wire rope diameter or elastic modulus can be appropriately increased under the conditions of other operating parameters to make the lifting system efficient and stable.run.In the acceleration phase of the wire rope lifting,under the condition of speed and acceleration change,the dynamic tension change position of the wire rope is within a fixed interval,from this,it can be concluded that the triggering condition for the vibration of the wire rope is the contact excitation during the second transition of the wire rope and the inter-turn transition device.The deformation formula of the deflection curve of the rope-wrapped area when the reel is subjected to three-layer winding under the condition of gradient load is established,and the model is extended to the deformation of the winding rope area of the ultra-deep mine lifting system.The results are compared with the simulation results,and the theoretical model of the deformation of the ultra-deep mine rope area is well verified.When the rope-wound area is subjected to the gradual load,its maximum point of deflection is at its middle position.In order to reduce the deformation of the rope-wrapping area and the reel,it is necessary to strengthen the structural strength of the middle portion of the rope-wrapping area.The drum wrap area is deformed due to the influence of the gradual load,and also affects the length difference between the ropes.In the process of winding the wire rope,the amount of unwinding between the winding gap and the ring will have an influence on the winding of the wire rope,and the amount of unsynchronization between the two rope regions has a greater influence on the variation of the length of the wire rope.Therefore,in the multi-point lifting process of the ultra-deep mine,it is necessary to ensure that the synchronization amount of the two steel ropes in the two rope-wrapping areas is within one circle of the asynchronous amount.When the rope angles of the two rope-wrapped areas are the same,the length of the wire rope wound by the rope-out method is obviously larger than that of the lower rope,that is,the use of the rope-out method during the winding process of the drum is more advantageous for system lifting.