Research On Mechanical Characteristics And Optimal Design Of Automatic Expansion Device For Train Pipe And Cable

The large-scale coal production has promoted the development of underground mining equipment towards high-speed,intelligent and large-scale,which has realized the high efficiency and high yield of coal mining.At the same time,there are still problems to be solved,among which the safe and orderly retract and release of cables and liquid pipes supporting various large-scale equipment has become an important part to be solved.At present most of downhole liquid will also in the use of monorail cable and pipe able to transport way,in the process of working face goes to the monorail frequently dismantling alternately,safe hidden trouble,waste of human and material cost,for this problem this paper proposes a translation type equipment train pipe line automatic telescopic device,the device is equipped between equipment trains and the working face,With the advance of the working face,the safe and orderly retracting and releasing of the cable is carried out.The subject of this paper comes from the key project of the key research and development plan of Ningxia Hui Autonomous Region in 2022: the development of large slope-long distance-large step self-moving equipment train in fully mechanized coal mining face,project number: 2022BFE02008.The main research work of this paper is as follows:1.Design the structure and analyze the position and posture of the cable automatic expansion device,establish the hydraulic system and calculate the data.According to the work requirements of pipe line automatic telescopic device design with whole structure and hydraulic principle diagram,attitude to the position of the pipe cable car in roadway using d-h method is analyzed,and then calculated the maximum of pipe line automatic telescopic device working resistance,according to the calculation of the working resistance and the stability of the hydraulic cylinder and hydraulic cylinder of the hydraulic cylinder diameter rod diameter,Finally,according to the requirements of the hydraulic system,the design and calculation of the hydraulic pump station are carried out.2.Compare whether the ball pair is equipped under the roll condition.Replace the hinge structure with the ball pair structure to greatly reduce the torque to the hydraulic cylinder.The ADAMS dynamic model inputs the load of two hydraulic cylinders to the AMESim hydraulic model,and the AMESim hydraulic model outputs the displacement of two hydraulic cylinders to the ADAMS dynamic model,and the co-simulation of the cable automatic expansion device is carried out.The speed and flow rate of the hydraulic cylinder are obtained,and the pressure of the hydraulic cylinder bracket under different working conditions of the two tube cable cars are compared.Finally,there is no synchronous loop in the hydraulic system.The synchronous loop has a good synchronization effect.3.Import the maximum force into Workbench for finite element analysis of the hydraulic cylinder support and frame,analyze the structural weakness and resonance frequency of these two components during work,and import n Code SN Constant(Design Life)module according to the results of finite element analysis and stress curve.The fatigue life of hydraulic cylinder support is analyzed to provide data reference for the next optimization design.4.According to the result of finite element analysis of optimized design of key parts,the first to the parameterized model,then the sensitivity analysis was carried out on the key parts,check the quality,the maximum equivalent deformation,the maximum equivalent stress influence the size of the parameters,and then to the size of the high sensitivity parameters using the Latin hypercube sampling method for the design point take,MOGA genetic algorithm was used to optimize the multi-objective function.After optimization,the maximum equivalent stress and maximum deformation of the hydraulic cylinder support were greatly reduced when the mass was reduced,and the maximum stress of the frame was greatly reduced when the deformation was slightly increased.This paper has 83 figures,16 tables and 80 references.