矿用车辆失压制动系统制动阀静态特性研究OA

Pressure-loss braking systems are widely used in mining vehicles.To understand the static characteristics of the brake valve,which is a core component in the brake system,and to improve the design theory of the brake system,a static mathematical model of the brake valve is established based on a detailed analysis of its structure and working principle.With different pedal forces as inputs,the variation law of the static braking pressure of the brake valve is studied,and the influence law and sensitivity of the main structural parameters of the brake valve on both the braking pressure and the maximum braking pressure are revealed.Finally,the theoretical calculation model is validated by using a full-vehicle braking system as the experimental platform.The results show that the static braking pressure of the brake valve is constrained by multiple factors.When the pedal force increases to a level sufficient to initiate pressure release,the braking pressure varies linearly with the pedal force.The greater the pedal force,the lower the braking pressure,but the maximum braking pressure is only related to the structural parameters of the brake valve.The sealing length,bias spring stiffness,and pressure regulating spring stiffness have a significant impact on the static characteristics of the brake valve,while the spool diameter and pressure regulating spring stiffness have a notable effect on the maximum braking pressure.