Fig 1.
Schematic diagram of fluid end of a reciprocating pump.
Fig 2.
Schematic diagram of discharge side of a pump valve.
Table 1.
Nomenclature.
Fig 3.
Schematic diagram of forces applied to valve.
Fig 4.
Schematic showing the division of fluid zones required for dynamic mesh motion.
Fig 5.
Computational regional boundary constraints.
a) Valve components; b) fluid-structure interaction.
Fig 6.
Time function for pump valve cycle.
a) Time function definition for loading forces; b) time function definition for moving wall displacement.
Fig 7.
Meshing of valve body and fluid zones.
a) Mesh of valve body; b) Mesh of divided fluid zones.
Fig 8.
Flow chart of valve motion analysis of a reciprocating pump.
Fig 9.
Test principle diagram of valve motion.
1) Torque speed sensor; 2) angular displacement sensor; 3) inhalation flow sensor; 4) temperature sensor; 5) pressure sensor; 6) displacement sensor; 7) vibration sensor; 8) discharge pressure sensor; 9) discharge flow sensor; 10) temperature sensor.
Table 2.
Experimental valve quality and spring stiffness.
Fig 10.
Data acquisition system schematic diagram.
Fig 11.
Curve of valve motion as a function of time with different spring stiffnesses.
a) Displacement curve comparison; b) velocity curve comparison.
Fig 12.
Curve of valve motion as a function of time with different valve masses.
a) Displacement curve comparison; (b) velocity curve comparison.
Fig 13.
Curve of fluid velocity of valve clearance as a function of time.
a) Fluid velocity curves of different spring stiffnesses; b) fluid velocity curve of different valve masses.
Fig 14.
Curve of valve opening resistance and shut-off lag angle with respect to valve quality.
Fig 15.
Curve of valve opening resistance and shut-off lag angle with respect to spring stiffness.
Fig 16.
Stress and strain curve of valve components with pump valve velocity under impact contact.
a) Valve body; b) valve seat; c) sealing gasket.
Fig 17.
Curve of valve lift and maximum displacement under identical conditions.
a) Valve lift curve with collection point; b) maximum displacement curve with respect to spring stiffness.