Auxiliary propulsion energy-saving device for ship hydrodynamics

An energy-saving device and auxiliary propulsion technology, applied in the direction of rotary propellers, rotary propellers, etc., can solve problems such as weakening of the effect, achieve the effect of reducing the power of the main engine and improving the propulsion efficiency

Inactive Publication Date: 2015-08-12
708TH RES INST OF CSSC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, with the development of ship shape line technology, new ship types make the effect of the original ship hydrodynamic energy-saving technology gradually weaken, and it is necessary to develop hydrodynamic technology suitable for new ship types

Method used

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  • Auxiliary propulsion energy-saving device for ship hydrodynamics
  • Auxiliary propulsion energy-saving device for ship hydrodynamics
  • Auxiliary propulsion energy-saving device for ship hydrodynamics

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Embodiment approach

[0025] Such as figure 1 and figure 2 As shown, one end of the second hydrofoil 2 is fixed on the outside of the first hydrofoil 1, and the other end is centered on the axis of the propeller and radially distributed outward. The sectional view of the second hydrofoil is specifically as follows Figure 4 As shown (plane a is the back of the wing, and plane b is the airfoil); the farthest distance between the second hydrofoil 2 and the propeller axis is equal to the radius of the propeller.

[0026] In a preferred embodiment of the present invention, one end of the second hydrofoil 2 is fixed on the outside of the first hydrofoil 1, and the other end is centered on the axis of the propeller, radially distributed outward, and the distance between the second hydrofoil 2 and the axis of the propeller is the farthest It is equal to the propeller radius, and the number is 2 to 4 pieces. Its main function is to change the flow direction within the large radius range of the propeller,...

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Abstract

The invention discloses an auxiliary propulsion energy-saving device for ship hydrodynamics. The energy-saving device is arranged ahead of a propeller and located outside of a ship hull opposite to rotation direction of the propeller. The energy-saving device comprises two support arms, a first hydrovane and second hydrovanes. The two support arms are of hydrovane shapes. One ends of the support arms are fixedly connected with a ship hull plate. The first hydrovane is in the shape of a semi-circular ring. Two ends of a semi-circular ring of the first hydrovane are fixedly connected with the other ends of the two support arms. Therefore, a fan-shaped structure is formed. One ends of the second hydrovanes are fixed outside of the first hydrovane and the other ends of the second hydrovanes are distributed outwardly in a radial pattern with the axis of the propeller as the center. The longest distance between each second hydrovane and the axis of the propeller is equal to the radius of the propeller. The auxiliary propulsion energy-saving device for ship hydrodynamics has following beneficial effects: because of the first hydrovane, flow equalization particularly close to a propeller hub within the small radius range of the propeller is achieved; the second hydrovanes change the flow direction within the large radius range of the propeller; tangential flow opposite to the rotation direction of the propeller is formed; and propulsive efficiency of the propeller is boosted.

Description

technical field [0001] The invention relates to an energy-saving device, in particular to a ship hydrodynamic auxiliary propulsion energy-saving device which is suitable for the flow in front of the propeller and can provide propeller pre-rotation. Background technique [0002] With the increasing global greenhouse effect, IMO (International Maritime Organization) has put forward higher requirements for energy saving and emission reduction during ship navigation, which are mainly reflected in two quantitative restrictions. First, the emission reduction requirements in ship design are EEDI (Ship Energy Efficiency Index) index, and the second is the EEOI (Ship Energy Efficiency Operation Index) index for emission reduction requirements during ship navigation. The former requires that the EEDI (Ship Energy Efficiency Index) index of new ships be reduced by 30% by 2025. Undoubtedly, to achieve the emission reduction target in such a short period of time will be extremely severe...

Claims

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Application Information

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IPC IPC(8): B63H1/28
Inventor 蔡跃进王金宝张越峰于海
Owner 708TH RES INST OF CSSC
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