The Secrets of Screw Pump Suction and Discharge
The inlet and outlet structure of a screw self-priming pump resembles a precise gear meshing system:
Inlet Design: A spiral groove forms a vacuum channel, creating a negative pressure zone during rotation, continuously drawing in liquid.
Sealed Chamber: Adjacent screws mesh to form a closed chamber, driving the medium in a directional direction.
Outlet Layout: The gradually increasing pressure in the chamber eventually converges into the outlet manifold, completing a smooth delivery.
The Three Pillars of Self-Priming Capability
The secret to this pump type's priming-free operation lies in:
Gas-Liquid Separation Chamber: Special diffuser Structural design reduces flow velocity, allowing gas to escape.
Backflow compensation design: Partial liquid circulation forms a sealing liquid ring.
Precision screw clearance: A micro-clear gap of 0.1-0.3mm prevents backflow and reduces internal leakage.
Flexible adaptability to different operating conditions: Amazing performance differences in different scenarios:
Viscous liquids: The progressive screw delivery is particularly suitable for handling high-viscosity media.
Gas-containing fluids: The self-priming structure can handle mixtures with a gas content of less than 15%.
Intermittent operation: Maintains ideal self-priming capability even during 72-hour downtime.
