Research On Electro-hydraulic Control System Of Mine Increasing Constant Torque Constant Deceleration Conversion Device

Mine hoist is the key transportation equipment for connecting uphole and downhole in coal mine production.The hoist brake system is the main device to ensure the safe operation of the hoist.Especially when a safety accident occurs,the hoist can be parked in a timely and effective manner to avoid further expansion of the accident.As the depth of coal mining increases,there is a higher demand for the lifting speed,lifting load and lifting distance of the hoist.Therefore,the impact and vibration of the conventional two-stage braking method on the hoist will be more severe,and the mechanical structure of the hoist will be damaged.For the friction hoist,even the wire rope will slip,resulting in further expansion of the accident.The constant deceleration braking mode is to make the hoist stable stop at a given deceleration under any working condition in an emergency situation,which avoids the shortage in the constant torque braking mode.At present,if we want to transform the constant torque braking method into the constant deceleration braking mode,we have to replace the Complete hydraulic station,resulting in high transformation cost and long transformation period.If you can add a set of equipment to the original constant torque brake system and realize the transformation of constant torque braking to constant deceleration braking,this will be of great significance to the transformation of the hoist brake mode.Therefore,this paper studies the hydraulic system and control system based on the original constant torque constant deceleration conversion device.According to the design principle of the constant torque constant deceleration conversion device and the relevant specifications of the industry,the constant torque constant deceleration conversion device has been designed.Finishing model and Simulation Analysis of Electro-hydraulic Proportional Relief Valve and Constant Deceleration Conversion Device Hydraulic System using AMESim.In the control system of the constant torque constant deceleration conversion device,a more intelligent fuzzy neural network PID control algorithm is applied to the constant torque constant deceleration conversion device control system.The design of the controller is completed according to the principle of fuzzy neural network PID.And Co-simulation of AMESim and Simulink is used to complete the Co-simulation of the control system and the hydraulic system.According to the function and working environment of the constant torque constant deceleration conversion device,PLC is selected as the core controller of the control system.Use TIA to design the software and human-machine interface of the control system.Use a designed and processed constant torque constant deceleration converter implement experimental verification.Test and analyze the performance of the electrohydraulic proportional relief valve.Test the performance of a constant deceleration converter system.Test results can meet the relevant requirements of the industry.