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Propulsion system for ship

A propulsion system and marine technology, applied in the direction of ship propulsion, water action propulsion components, propulsion components, etc., can solve difficult problems such as power density, and achieve the effect of high operational reliability and low bending stiffness

Inactive Publication Date: 2006-02-22
KONGSBERG MARITIME SWEDEN AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For known designs, it is difficult to achieve power densities greater than 1 kW / kg for waterjets with inlet diameters greater than 1 m, which is an undesirable and serious limitation

Method used

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  • Propulsion system for ship
  • Propulsion system for ship
  • Propulsion system for ship

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] Figure 1 shows a thruster arrangement according to the invention in vertical section. The stator case 1 is securely mounted to the rear of the hull by bolts 2 or the like. A propeller housing 3 in the form of a conical front is mounted on the stator part 1 by means of bolts 4 or similar. The inlet of said front part of the propeller housing 3 (with a certain diameter D) is aligned with a forwardly extending tubular water inlet, known per se (not shown). The journal 11 is firmly connected in rotation and bending to the shaft 12 by means of a first coupling 11B and via a rotating propeller bottom 13 .

[0027] The conical housing 5 , whose tip is pointing backwards, is fixed firmly in the stator housing 1 by means of non-rotating guide vanes 1A. Inside the housing 5 there is a bearing seat 6 which is mounted via a screw 7 approximately in the center of the housing and serves to support the bearing arrangement 9 , 16 for the journal on the drive shaft 12 . To allow wate...

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PUM

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Abstract

A propulsion system for ships having an impeller (13, 14), a stator shell (1), and an impeller housing (3) for achieving a water jet, a shaft (11, 12) for the propulsion of the impeller (13), and a bearing arrangement for the shaft (11, 12) in the stator shell (1), and preferably a sealing (15) of the shaft (11, 12) in the impeller housing (3), wherein the shaft (11, 12) consists of a light weight shaft, which has considerably lower bending rigidity than a homogenous, conventional steel shaft, and the driving force is transmitted via at least one non-flexible coupling (11B, 12A) and via the bearing arrangement which is rigid as to bending and handles the axial load, to the stator shell (1), such that a high power density is achieved.

Description

field of invention [0001] The invention relates to a marine propulsion system, which includes one or several propellers installed on each shaft, and the propellers generate driving force to drive the ship forward. The propeller, which rotates within the propeller housing by means of a drive shaft, is provided with propeller blades, producing a rearward jet. Background technique [0002] Generally known marine propulsion devices, preferably propulsion devices for the rapid movement of military and civilian vessels by means of water jets, comprise propellers. A casing surrounding the rotating propeller provided with blades is fixedly mounted at the rear of the hull. The propeller is generally driven by a steel shaft which extends towards the shank through a suitable structure which in turn is driven by one or more motors located within the hull. A tubular water inlet sloping slightly downwards in the direction of motion is provided at the front of the propeller housing in or...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B63H11/08B63H20/14B63H23/32B63H23/34F16C3/02F16C17/14F16C19/10F16C19/36F16C19/54F16C33/66F16C33/76
CPCB63H11/08B63H2011/081B63H23/34B63H23/321
Inventor 詹斯·托恩布拉德克里斯特尔·黑格尔斯文-冈纳·卡尔森冈纳·斯蒂拉德
Owner KONGSBERG MARITIME SWEDEN AB