SIDE-INTAKE PISTON WATER JET PROPULSOR

摘要

A piston water jet propulsor for propelling marine vehicles employs the concept of the Side-Intake of water and generates thrust through piston's reciprocating motion in cylinder. The concept of the Side-Intake opens water intake holes on the side and near the discharge end of the cylinder wall with a rotational and electric-magnetic actuated valve to control the intake holes open for water intake or closed during water discharge through the nozzle at the end of the cylinder. The principle feature of the Side-Intake is the separation of the cylinder into a dry and a wet compartment at any time piston moves. The dry compartment is always at atmospheric condition, which allows the piston encounters only air resistance during its recovering stroke. The Side-Intake Piston Water Jet Propulsor requires at least a 2-cylinder system to maintain a continuous water intake and discharge. The preferred embodiment is a Side-Intake Piston Water Jet Propulsor with 4 cylinders.