Water-Jet Pump and Nozzle System Design
topic
Water-jet loom pump systems use high-pressure piston or diaphragm pumps delivering water at 20 to 60 bar through a convergent nozzle at flow rates of 1 to 3 litres per minute per loom, with nozzle geometry designed to entrain the weft yarn into the water jet core and accelerate the yarn to insertion velocities of 10 to 30 metres per second without yarn breakage from hydraulic drag forces during acceleration.
Role
Defines the hydraulic insertion force and energy efficiency of water-jet weaving through pump pressure and nozzle geometry, with high pump pressure providing the acceleration force needed for heavy filament yarns while minimum required pressure reduces water and energy consumption, and nozzle geometry optimisation determining the insertion reliability for each yarn type and machine speed combination.