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KR-102962884-B1 - MARINE DUCTED PROPELLER JET PROPULSION SYSTEM

KR102962884B1KR 102962884 B1KR102962884 B1KR 102962884B1KR-102962884-B1

Abstract

The present invention relates to a jet propulsion unit for a marine vessel comprising a diffuser/confuser; a steering control nozzle assembly; and a radius. The radius is introduced at a transition point between the diffuser/confuser and the steering control nozzle assembly so that the diffuser/confuser can control the shape of the water flow exiting the propulsion unit and also control corresponding acceleration for large pressure differences presented by a wide range of vessel speeds, maneuvers, and sea conditions.

Inventors

  • 브로이나우스키 스테판

Dates

Publication Date
20260512
Application Date
20140317
Priority Date
20130315

Claims (9)

  1. A marine ducted propeller jet propulsion device including a propulsion system (10), An intake area (100) having an inlet housing (104), and The impeller section (200) located downstream of the intake section (100) includes a diffuser housing and an impeller housing (251) having a diffuser (242) and an impeller (202), and An exhaust zone (400) located downstream of the impeller zone (200) and comprising a steering nozzle assembly having an upper steering nozzle (401) and a lower steering nozzle (402), and A passage (102, 110, 122) extending from the intake opening (106) of the intake area (100) formed on the lower surface of the hull to the outlet of the steering nozzle assembly, and Multiple internal housing parts and, It includes a buried exhaust gas housing (500) configured so that the heat of the engine exhaust gas heats the diffuser housing and the steering nozzle assembly, and The inlet housing (104), impeller housing (251), diffuser housing, upper steering nozzle (401), and lower steering nozzle (402) create a flow path for water flow on a volumetric basis, and The Euro has a length and an axial cross-sectional area, The axial cross-sectional area of the flow path is adjusted along the length of the flow path by increasing the outer size of the passage (102, 110, 122) or increasing the radius of the axial cross-sectional area to accommodate the volume of multiple internal housing parts while maintaining a regularly decreasing volume of water from the intake zone (100) to the exhaust zone (400), and the flow path reduces turbulence and improves plug-flow of water flow, The exhaust zone (400) further includes a bleeder hole so that captured air introduced into the propulsion system (10) can exit to the exhaust gas housing, a marine ducted propeller jet propulsion device.
  2. In paragraph 1, A plurality of internal housing components include an impeller intake port (203), a drive shaft (204), a guide vane (206), a directional vane (208); an impeller (202), an impeller blade (250), an impeller hub (252); a diffuser/confuser hub (243), a diffuser/confuser vane (244), a diffuser/confuser blade (245); a steering shaft (501) having a positioning vane; and a marine ducted propeller jet propulsion device comprising a spoke vane, a flow control vane, and a straight vane.
  3. In paragraph 1, A marine ducted propeller jet propulsion device further comprising an extended outlet radius (246) that enables a less angular transition from the diffuser/confuse housing to the upper steering nozzle by being introduced at the transition point between the diffuser/confuse housing (242) and the upper steering nozzle (401).
  4. In paragraph 1, The lower steering nozzle (402) is a marine ducted propeller jet propulsion device that is interchangeable to allow adjustment of the steering nozzle.
  5. In paragraph 1, A ducted propeller jet propulsion device for marine use, wherein the lower steering nozzle (402) includes a steering vane, the steering vane can be retracted and maintains the lower steering nozzle (402) in a straight position when the vessel is moving.
  6. In paragraph 1, A marine ducted propeller jet propulsion device further comprising intake straight vanes (208) positioned on both sides of an inlet housing (104) and guiding water flow from the inlet to the impeller housing (251).
  7. In paragraph 1, The lower steering nozzle (402) is detachably attached to the end of the upper steering nozzle (401), and The lower steering nozzle (402) has a ratio of inlet diameter to outlet diameter proportional to the required volumetric velocity ratio adjustment required to fine-tune the required outflow, for a marine ducted propeller jet propulsion device.
  8. In Paragraph 7, A marine ducted propeller jet propulsion device further comprising a straight vane that controls water flow through the radius of the steering nozzle by being positioned around the interior of an interchangeable lower steering nozzle (402).
  9. In paragraph 1, The impeller housing (251) includes a replaceable blade assembly impeller (202), and The interchangeable blade assembly impeller (202) includes an impeller hub (252) and an impeller blade (250), and The impeller blade (250) is fixed along a convex surface inclined outwardly toward the impeller hub (252), and A marine ducted propeller jet propulsion device, wherein the replaceable blade assembly impeller (202) is configured to allow replacement of individual impeller blades (250) on the replaceable blade assembly impeller (202) in case of damage, and configured to allow changing the pitch of the impeller blades (250) for different uses.

Description

Marine Ducted Propeller Jet Propulsion System Cross-reference regarding related applications This application claims priority to U.S. Provisional Patent Application No. 61/799,274, filed on March 15, 2013, titled "MARINE DUCTED PROPELLER JET PROPULSION SYSTEM," which is incorporated herein by reference. Technical field of the present invention The present disclosure relates to exemplary embodiments of a ducted propeller jet propulsion system for marine applications, and specifically, to exemplary embodiments of an impeller assembly and duct design of a ducted propeller jet propulsion unit for marine applications. The use of jet propulsion devices in marine craft is a well-known technology. Although jet propulsion energy consumption is not significantly more efficient than that of conventional propeller systems, jet propulsion offers many advantages over single propellers, particularly in terms of shallow water and maneuverability. However, due to certain general problems associated with marine jet propulsion, it is not widely accepted in marine craft. For example, marine jet propulsion poses significant design challenges due to unstable performance at the inlet of the jet propulsion unit under various speeds, depths, sea conditions, and excessive water pickup, which can cause balling. Another common problem is cavitation. Cavitation manifests as an uneven pressure load (net positive suction head) on the impeller. Cavitation can be generated by excessive radial acceleration of the fluid, excessive vortices and turbulence in the fluid column, and pressure changes, which cause unintended incomplete evaporation of fluid throughput associated with the vacuum generated by impeller operation. Therefore, it would be desirable to design a jet propulsion unit for a marine vessel in which each component works synergistically to provide a constant column of water even at high output, while ensuring that the water throughput is neither turbulent nor swirling to eliminate the effects of cavitation and pressure changes. Furthermore, the unit must possess maximum adaptability to cope with the marine vessel's full speed range and various loads on the unit from its prime mover, without generating the aforementioned effects of bowling and cavitation. A jet propulsion unit of a marine vessel comprises a diffuser/confusor; a steering control nozzle assembly; and a radius. The radius is introduced at a transition point between the diffuser/confusor and the steering control nozzle assembly so that the diffuser/confusor can control the shape of the water flow exiting the propulsion unit and also control corresponding acceleration for large pressure differences presented by a wide range of vessel speeds, maneuvers, and sea conditions. The foregoing and other purposes of the present disclosure will become clear from the following detailed description taken together with the accompanying drawings and claims, in which similar reference numbers throughout the specification refer to similar parts, wherein: FIG. 1 is an exemplary diagram of a ducted propeller jet propulsion device for marine use according to an exemplary embodiment of the present disclosure; FIG. 2 is an exploded view of a marine ducted propeller jet propulsion device according to an exemplary embodiment of FIG. 1; FIG. 3 is an exploded view of a marine ducted propeller jet propulsion device according to an exemplary embodiment of FIG. 1; FIG. 4 is an exploded view of a marine ducted propeller jet propulsion device according to an exemplary embodiment of FIG. 1; FIG. 5 is an exemplary diagram of an impeller and a diffuser of a marine ducted propeller jet propulsion device according to an exemplary embodiment of FIG. 1; FIG. 6 is an exemplary diagram of an impeller hub and a diffuser hub of a marine ducted propeller jet propulsion device according to an exemplary embodiment of the present disclosure; FIG. 7 shows various drawings of an impeller of a marine ducted propeller jet propulsion device according to an exemplary embodiment of the present disclosure; FIG. 8 is a variety of drawings of a diffuser/confuser of a marine ducted propeller jet propulsion device according to an exemplary embodiment of the present disclosure; FIG. 9 is an exemplary diagram of a ducted propeller jet propulsion device for marine use according to an exemplary embodiment of the present disclosure; FIG. 10 is a drawing of various trims of a marine ducted propeller jet propulsion device according to an exemplary embodiment of the present disclosure. In the drawings, the same reference numbers and letters are used to denote similar features, elements, parts, or sections of the illustrated embodiments unless otherwise noted. Additionally, although the present disclosure will now be described in detail with reference to the drawings, it will be done together with exemplary embodiments. Changes and modifications may be made to the described embodiments without departing from the scope and spirit of t