Analysis Of Electro-mechanical Conversion Device For Mine Solenoid Valve And Its Characteristics

The hydraulic support electro-hydraulic control system is an important part of the fully mechanized mining face,which plays a decisive role in the high productivity and efficiency of the face.The mine electromagnetic pilot valve is an important part of the hydraulic support electro-hydraulic control system.The hydraulic support completes the predetermined action by controlling the on and off of the main valve.As the core component of the electromagnetic pilot valve,the electro-mechanical conversion device directly restricts the normal operation of the entire electro-hydraulic control system.In mining conditions,in order to ensure the safety of the underground,the electromechanical conversion device needs to meet the intrinsic safety conditions,that is,to meet the operating requirements of the working conditions under the condition of low power consumption.Therefore,two different mine solenoid valve electromechanical conversion devices are designed and analyzed.Firstly,the classification of electromechanical conversion devices and the current research status at home and abroad are first analyzed,then the advantages and disadvantages of each electromechanical conversion device are analyzed,and on this basis,two electro-mechanical conversion devices,electromagnet and voice coil motor,which are suitable for mine solenoid valves,are proposed.Secondly,based on the related theories of electromagnetic field and magnetic circuit,this paper carries out mathematical modeling of electromagnet and voice coil motor,and their respective dynamic response processes are analyzed.The force analysis of the electromechanical conversion device on the mine solenoid valve is carried out,and the load on it is calculated.Based on this,the material selection and structure design of the electromagnet and voice coil motor are carried out.Thirdly,by using Ansoft Maxwell to analyze the dynamic and static characteristics of the electromagnet and the voice coil motor,respectively,the magnetic induction intensity and magnetic flux change of the two in the magnetic field are studied respectively,and the force displacement characteristics of the two are analyzed,and the electromagnetic force,air gap,and The relationship between the magnetic potential;in addition,the influence of the structure and key parameters on the electromagnetic force characteristics of the electromagnet and the voice coil motor was studied separately,and the structure is optimized.Finally,the dynamic characteristic curves of the electromagnet and the voice coil motor under no-load and load conditions are studied.By using different frequency PWM signals to excite,the dynamic response curve of the electromagnet under no-load and the corresponding current are obtained.Parameters and the fastest frequency response,and the dynamic characteristics of the electromagnet under no load and load are obtained through experiments;the dynamic response curve of the voice coil motor under no load and load is also studied,and the corresponding current parameters and the fastest frequency response are obtained.Through the above analysis,the designed electromagnet and voice coil motor can meet the requirements of the corresponding working conditions to complete the predetermined action under the mine intrinsic safety conditions.This article provides a theory for the design and research of the electromechanical conversion device on the mine solenoid valve And engineering reference value.