Design And Research On The Working Device Of The Hydraulic Support Carrier

In view of low efficiency and heavy load of hydraulic support handling,this topic carries out the research on underground hydraulic support trackless transportation equipment to improve the design quality of whole machine and the performance of hydraulic system,which has great significance to improve support handling efficiency and construction speed of working face.This article takes the hydraulic support carrier as the research object,and the working device and hydraulic system of support carrier is designed.The dynamic and modal analysis of the working device was carried out using finite element method,and experimental tests were conducted on the prototype of hydraulic support carrier.The main research content is as follows:A detailed discussion was conducted on the environmental characteristics and application scenarios of support carrier.The functional requirements of the hydraulic support carrier were determined.According to the working conditions,the overall scheme of the hydraulic support carrier was designed.The focus is on the design of its working mechanism and walking device,and laying the foundation for mechanical analysis and hydraulic system design.For the working device of the support carrier,a dynamic simulation model and a modal analysis simulation model were established in the finite element analysis software ANSYS.The stress distribution and deformation results of the working device under four different typical working conditions were analyzed,and the key stress positions and maximum deformation of the working device of carrier were determined.The reasons for stress concentration were analyzed,and suggestions for optimizing the structure of the working device were given.In modal analysis,the natural modal frequencies of working device in working conditions 1 and 3 were calculated,and its vibration mode characteristics and maximum displacement under each mode vibration were determined.Modal resonance was avoided in advance during the design process of the support handling vehicle.According to the action requirements of the working device,the design and calculation of hydraulic system have been completed.The AMESim-Simulink joint simulation model for the hydraulic system of the support carrier have been established.According to its functions,the model is mainly divided into a walking motor control circuit,a rotating cylinder control circuit,a sliding oil cylinder control circuit and a lifting oil cylinder control circuit.For the control circuit of walking motor,simulation analysis was conducted on motion speed characteristics of motor under different throttle valve openings,control signals and tunnel geology.Analyzed the response speed and steady-state tracking error of the rotary oil cylinder control circuit and the sliding oil cylinder control circuit when the input signals are sinusoidal and step signals.In addition,the synchronization error of lifting cylinder under eccentric load was analyzed due to the opening of synchronization valve and throttle valve.The simulation results show that the execution mechanisms of support carrier have good stability,good dynamic and static characteristics,which can meet the requirements of bracket handling.This article elaborated on the purpose and content of the hydraulic support carrier test and designed a test plan and system for the hydraulic support carrier.The software and hardware architecture of the hydraulic support carrier test system was provided.The main hardware and selection of test system were introduced.Finally,hydraulic support carrier handling testing,workspace testing,working mechanism stress testing,working mechanism lifting cylinder pressure testing,and working mechanism walking motor flow testing were carried out.There are 75 figures,14 tables and 80 references in this paper.