Design And Analysis Of The Manual Pressurization Device For The Initial Supporting Force Of The Hydraulic Support

The initial supporting force of the hydraulic support is the key parameter of the support equipment for the coal mining face,and its size has a great influence on the normal support and safe,high-efficiency production of the coal face.with the continuous progress of fully mechanized mining technology in thick coal seam and the increasing of mine mining depth,the serious shortage of support force and uneven distribution of the support are caused,the increasing mining depth has put forward higher requirements for the support and supporting performance of hydraulic support.Therefore,the dissertation designs and analyzes the manual booster device for hydraulic support initial support,improves the initial support force of the support,prevents the roof from falling,and increases the stability of the top plate.Firstly,the paper analyzes the support column loop system and its bearing process based on the research of the existing hydraulic support,and confirms the use of manual pressurizing device for pressurization through comparative analysis of various pressurized methods.Based on the design of pressure-increasing control loops,a design scheme combining hydraulic transmission and mechanical design was determined.Secondly,according to the design scheme,the structural parameters of the manual pressurization device for the initial support force of the hydraulic support are designed.The structural design of the cylinder body,the piston.the main valve body and the connecting piece of the booster cylinder is completed,and the three-dimensional modeling of the manual pressurizing device is completed using the Solidworks modeling software.Based on this,according to the structural features of the pressure booster control valve of the manual supercharger,a two-dimensional flow field model was developed to analyze the FLUENT flow field characteristics,and completed of pressure,velocity and vector cloud diagram analysis under different valve opening degree,analyzed of flow field changes at different opening degrees and suggestions for optimization,verified the rationality of the structure of'the pressure control valve design.At the same time,simulated and analyzed the manual supercharging valve,the manual supercharger control loop and the support column lifting frame system loop based on the AMESim hydraulic simulation platform,simulating the working performance and the dynamic characteristics of the control loop of the manual supercharger.Finally,by comparing and analyzing the simulation curves,the manual pressurization device trial and the down-hole site installation test,it is proved that the design of the manual pressurization device meets the expected pressurization requirement,and its structural design is reasonable and the pressurization effect is obvious.Based on the traditional structural design theory,the design analysis and test of the manual booster device for the hydraulic support initial support force by use of virtual simulation and analysis of flow field characteristics proves that this booster device can meet the support and safe production requirements for the fully-mechanized mining face with large mining height.And this supercharging device has good adaptability,high versatility,and stable and reliable pressurization.The research results have certain reference value for the stability of the hydraulic support lifting system under the fully mechanized coal mining face and the safe production of the coal mining face,and provide a certain theoretical support for the design and application of the initial support force booster device for the support.It provides a theoretical basis and valuable experience for the follow-up study of the hydraulic support's initial supporting force.It also provides new ideas for the development of the coal mine comprehensive mining equipment and has broad application prospects and popularization and application value.