Curved culvert type marine propeller

A marine propeller and ducted technology, applied in the direction of rotating propellers, rotating propellers, etc., can solve the problems of uneven force, difficult cavitation, low work efficiency, etc.

Active Publication Date: 2015-07-15
中交四航局江门航通船业有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to overcome the shortcomings of traditional civil ship propellers, which are prone to cavitation, uneven force, low work efficiency and unsuitable for composite materials, and provide a kind of propeller suitable for small civil ships, which is not easy to produce cavitation, suffer from Curved ducted marine propeller with uniform force, high work efficiency, and suitable for composite materials

Method used

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  • Curved culvert type marine propeller
  • Curved culvert type marine propeller
  • Curved culvert type marine propeller

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Embodiment Construction

[0023] The present invention is further described below in conjunction with accompanying drawing.

[0024] refer to figure 1 , figure 2 and image 3, the curved ducted marine propeller is mainly composed of a coupling part 2, a paddle shaft 5, a curved duct 6, a blade 8, and a tail cone 9. The paddle shaft 5 and the tail cone 9 are connected together in turn, and several blades 8 Fixed on the paddle shaft 5, the curved duct 6 is covered on the outside of several blades 8, and the inner surface of the curved duct 6 is connected with the tip of several blades 8. The shaft coupling part 2 connects the curved duct type marine propeller and the ship shaft 1 together.

[0025] refer to Figure 5 , the curved duct 6 is trumpet-shaped, and the curved duct 6 is respectively the duct front edge 17, the duct throat 18, and the duct rear edge 19 from front to back. The cross-sectional diameter of the duct front 17 is the largest, and the duct throat 18 has the smallest cross-section...

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Abstract

The invention provides a curved culvert type marine propeller, relating to marine propellers. The curved culvert type marine propeller mainly comprises a coupling component, a propeller shaft, a curved culvert, propeller blades and a tail cone, wherein the curved culvert type marine propeller is driven to rotate according to a rotation direction by a ship shaft so as to drive a ship to travel forwards. When the ship travels forwards, the cross section diameter of the front edge of the culvert is far greater than that of a throat of the culvert, resistance is generated by the front edge of the culvert, then, the hydrostatic pressure of a water absorbing area in the front edge of the culvert is increased, thus, the air bubble limit of the propeller is delayed, and the degree of cavitation is lowered, so that noise and vibration are lowered, the cavitation is lowered, and the performance of the propeller is improved; blade tips of the propeller blades of the curved culvert type marine propeller are connected together with the internal surface of the curved culvert, so that the curved culvert type marine propeller can be high in structural strength and rigidity and is suitable for being made from composite materials which are represented by carbon fiber reinforced plastics.

Description

technical field [0001] The invention relates to a curved ducted marine propeller, which relates to a marine propeller, in particular to a curved ducted marine propeller. Background technique [0002] There are many types of marine propellers. The common civil ship propellers mainly include ordinary propellers, ducted propellers (also called duct propellers, referred to as duct propellers), and adjustable pitch propellers. [0003] A common propeller consists of blades and a hub. The connecting part of the propeller and the ship shaft is called the propeller hub, and the propeller hub is a truncated cone. In order to reduce the water resistance of the propeller, a hub cap is installed at the rear end of the propeller hub, and the hub cap and the propeller hub together form a streamlined shape. Ordinary propellers are usually three or four blades, and the blades are fixed on the hub. When looking forward from behind the stern, one side of the propeller blade is called the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B63H1/14B63H1/26B63H1/28
Inventor 赵晓东
Owner 中交四航局江门航通船业有限公司
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