Characteristic Analysis of Digital Large Flow Emulsion Relief Valve

Table 1

Simulation parameters of each component of relief valve.

Element	Parameter name	Numerical value
Pilot valve	Spool quality (kg)	0.01
	Spool diameter (mm)	5
	Seat aperture (mm)	3.8
	Maximum displacement of the spool (mm)	30
	Pressure regulating spring preload (N)	429
	Regulating spring stiffness (N/mm)	14.3
	Pilot valve front cavity volume (m^3)	1.2  10^–6
Emulsion	Temperature (°C)	40
	Density (kg/m^3)	890
	Dynamic viscosity (Pa·s)	0.792  10^–3
Main valve	Spool quality (kg)	0.06
	Spool diameter (mm)	50
	Seat aperture (mm)	49
	Maximum displacement of the spool (mm)	18
	Pressure regulating spring preload (N)	654
	Regulating spring stiffness (N/mm)	9.038
	Main valve front cavity volume (m^3)	2  10^–4
Damping hole	Damping aperture (mm)	1.2
	Damping hole length (mm)	14.4
	Two orifice diameter relationship	Same