| 摘要 |
FIELD: shipbuilding; water-jet propellers of smaller ships. SUBSTANCE: water-jet propeller has housing 1, flow straightener 2, swivel nozzle 3 which are connected in succession and fitted on propeller shaft 4. Inlet hole of water conduit 1 is closed with rectangular protective grate 4 provided with knives made in form of tear-shaped longitudinal section. Fairing 7 and impeller 8 are fitted on propeller shaft 4 inside water conduit. Blades of impeller 8 are located at varying pitch: pitch is lesser at blade tip and is larger at its root. Swivel 3 is provided with adjustable astern running damper 9. EFFECT: increased speed of ship due to increased power of water-jet propeller through reduction of power loss factor. |
