The Design And Gripe Of The Main Engine Of The Test-bench Of Electro-hydraulic Of Miniature Rig

With the rapid increase of the national economy,the demand of country forenergy resources continues to increase.But now the difficulty of energy resourcesdevelopment is more challenging than before,the hardness of the rock is harder thanever. Each year,as the exploitation of underground resources to consume the moneyand the cost of the material is getting higher and higher,so it is important for theimprovement of drilling technology and the selection of drilling technology.Thequality of the drill during the drilling process,it influences the construction progress ofthe drilling.It is very important to develop a new type of drill which has theadvantages of high efficiency,low cost and long service life.In view of therequirements for the development and testing of the drill bit by the departments ofgeology,nonferrous metals,coal field,petroleum and so on,we develop the microdrilling test rig of the electro-hydraulic micro drilling rig.Hereinafter referred to as themicro drill rig.It’s very meaningful to test the performance of the newly developeddrill bit.Micro drilling rig can simulate real drilling situation,for example,with the sampletransfer movement,head rotary movement and feeding movement.The micro drillingrig can realize the monitoring, collection,processing and storage of the drillingparameters(the drilling pressure,drilling speed,torque,speed and length) in the drillingprocess.It also can establish the database of the parameters report file.We decomposethe task according to the overall scheme of micro drilling test rig,the overallclassification of the micro drilling test bed is two parts,To determine the basicrequirements of the micro drilling rig,the main components of the micro drilling rigand the overall layout,the working principle of the micro drilling rig.The drilling testbench parameters were calculated,for example,The theoretical calculation of therotary speed,the output torque of the power head and the amount of the liquid pumpare respectively.According to the micro drilling test bench basic requirements werethe sample box,main frame component,a movable cross beam,the power head,an outercover design.The design of the main components of the unified assembly.Micro drilling rig contains hydraulic control system and Parameter detection and control system.Firstly,the classification of hydraulic control systemisbrieflyintroduced.Secondly,according to the design requirements of the micro drilling rig,thehydraulic control system needs to drive the power head into the rotary movement,andit can realize the stepless speed regulation of the hydraulic motor.The loadcharacteristics of the hydraulic control system of the micro drilling system and therotary loop are analyzed.According to the calculation of the drilling parameters（power head rotation speed, output torque, flushing fluid pump volume）and therequirements of micro drilling conditions,we select the hydraulic pump,hydraulicmotor and relative parts,and determine the parameters of micro drilling.The overalldesign of the hydraulic power pump station, which makes it centralize,operateeasily,beautiful appearance and so on.Finally,the design and analysis of the drilling parameters detection and controlsystem of the micro drilling rig are carried out.The principle of parameter detection isbriefly introduced,On drilling pressure,rotary speed,drilling speed and drilling depthdetection principle analysis and we carry out the selection of the correspondingsensor.As a result,during the process of micro drilling,it can stable the overallperformance of the micro drilling rig,teste the stability of the micro drilling rig,andachieve expected target.