Characteristics Of Relief Valve Research Articles

Dynamic Characteristics and Stability Analysis of Conical Relief Valve

The overflow rate of poppet relief valve is established, the dynamics characteristics of poppet relief valve which contains transient flow force and steady flow force is established. Based on this point, the stability conditions of poppet relief valve system are derived using Routh-Hurmitz method. The effect of the design parameters of relief valve on the dynamic characteristics of poppet valve system is analyzed. Using sensitivity analysis, the effects of parameters of the most significant is obtained, that is diameter D of liquid flow cylinder fluid. The results showed that, the established model can largely capture the dynamic characteristics of the relief valve system, the established stability condition can be used as a favorable basis for the design of valve. DOI: http://dx.doi.org/10.5755/j01.mech.25.1.22881

Simulation of Dynamic Characteristic of Reverse Pressure Relief Valve with AMESim

The dynamic characteristics of reverse pressure relief valve were studied by simulation to solve the problems of the outlet pressure fluctuating and structural vibration of launch vehicle gas supply system. A simulation model was established. The pressure and displacement of valve were simulated through AMESim. The results are consistent with the experiment data. The study shows that the dynamic characteristics of the relief valve are related to the damping ratio of the moving elements, the length of the inlet and outlet pipe and the opening degree of the solenoid valve. By adjusting the damping ratio of the moving elements, the gas pressure fluctuation and structural vibration of the valve were restrained.

Impedance and stability characteristics of a relief valve

The hydraulic impedance characteristics of a cartridge-type relief valve are studied through measurement and mathematical modelling. Excellent agreement between the model and measurements is obtained. Most of the model parameters can be evaluated readily from measurement or calculation, though the friction factor and bulk modulus are adjusted to match the model to the measurements. The effect of the various physical parameters on the stability of the valve is discussed. The hydraulic inductance through the damping orifice is shown to have a very strong effect on the impedance and stability.

Impedance and stability characteristics of a relief valve

The hydraulic impedance characteristics of a cartridge-type relief valve are studied through measurement and mathematical modelling. Excellent agreement between the model and measurements is obtained. Most of the model parameters can be evaluated readily from measurement or calculation, though the friction factor and bulk modulus are adjusted to match the model to the measurements. The effect of the various physical parameters on the stability of the valve is discussed. The hydraulic inductance through the damping orifice is shown to have a very strong effect on the impedance and stability.