Research On Mechanical Characteristics And Optimal Design Of Train Power Device With Self-moving Equipment

As one of the most common transportation equipment in the coal mine underground roadway equipment transportation system,the equipment train is widely used in the equipment transportation of the underground roadway in the coal mine,and the performance and reliability of the equipment train directly affect the production efficiency of the coal mine.Therefore,the mechanical characteristics analysis and structural optimization design of the power unit(hereinafter referred to as the anchor traction device)of the equipment train are of great significance to improve the underground work efficiency and reduce the occurrence of accidents caused by the failure of transportation equipment.The topic of this thesis is from the key project of the key project of the key R&D plan of Ningxia Hui Autonomous Region in 2022: the development of large-slope-long-distance-large-step self-moving equipment train in the comprehensive mining face of coal mine(project number: 2022BFE02008).The main work of the thesis is as follows:1.This paper first introduces the research background and significance,briefly summarizes the power device of the new self-moving equipment train,and compares the current situation of underground equipment transportation at home and abroad,and concludes the necessity of developing large-slope-long-distance-large-step self-moving equipment train.2.A brief overview of the anchor traction device,including: structural composition,working principle and bearing principle;Secondly,combined with the overview of the working face and the working environment of the anchor traction device,the working conditions of the anchor traction device are divided into conventional working conditions and impact load conditions.Then,according to the different operating conditions of the self-moving equipment train,the load of the anchoring traction device under normal working conditions is calculated.Finally,according to the overview of Jiangjiahe Coal Mine,the type of shock load of the anchor traction device is determined,which provides data support for the reliability analysis of the anchor traction device later.3.The model of the anchoring traction device is simplified into a plane model,and the plane mechanics of the top beam and the main support beam of the anchoring traction device are analyzed respectively,and the main factors affecting the force of the main support beam of the anchoring traction device are analyzed.Secondly,the space mechanics analysis of the main support beam of the anchoring traction device is carried out,and the general law of the working height and the main support beam affected by the load is obtained.Finally,according to the mechanical vibration theory under dynamic load,the vibration model of the anchorage traction device is obtained,the dynamic model of the anchorage traction device is established and solved,and the relationship between the influence of the external excitation force of the anchor traction device under the working state and the response of the i-order inherent mode shape is obtained,which provides a theoretical basis for the study of the mechanical characteristics of the dynamic response of the anchorage traction device in the future.4.Using the ANSYS Workbench module,the static analysis of the anchor traction device was carried out,including the establishment of finite element static model,the application of boundary load conditions,the definition of working load and the simulation solution,and it was concluded that the strength,stiffness and safety factors of the anchor traction device as a whole,the main support beam and the base at different slopes and heights met the reliability requirements.Then,with the help of Hyper Mesh combined with ANSYS and ADAMS,the transient dynamics analysis of the main support beam was carried out,and based on the simulation of rigid-flex coupling model,it was concluded that the strength,stiffness and safety factor of the main support beam of the anchor traction device met the reliability requirements under impact load.Finally,combined with the modal analysis of the main support beam,it is concluded that the main support beam will not resonate under working conditions.5.ANSYS Workbench software was used to perform multi-objective optimization of the anchored traction unit’s main support beam.Firstly,the optimization model of the main support beam is constructed based on the radial basis neural network model(RBF)and the Kriging model,and then two optimization models are constructed on the basis of the CCD experimental method,and the radial basis neural network model is selected after the accuracy comparison.Finally,the multi-objective genetic algorithm(MOGA)is used to solve the objective function.The optimization results improve the strength and stiffness of the main support beam,and the quality decreases.The paper has 48 figures,12 tables and 62 references.