Ducted propeller support partition pre-swirl deflector

A technology of deflector and ducted propeller, which is applied in transportation and packaging, ship construction, ship propulsion, etc. It can solve the problems of reduced propulsion efficiency, large flow unevenness, propeller cavitation, etc., and can improve vibration and cavitation performance , Improve propulsion efficiency, and flexibly adjust the effect

Active Publication Date: 2021-04-06
CHINA SHIP SCIENTIFIC RESEARCH CENTER (THE 702 INSTITUTE OF CHINA SHIPBUILDING INDUSTRY CORPORATION)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the prior art, ducted propellers or combined propellers with ducts have a single supporting structure, which is generally composed of a flat plate without an angle of attack or a wing plate with a certain angle of attack with the incoming flow. Certain rectification and pre-rotation effects
However, when the ducted propeller is located behind the ship, under the action of multi-directional incoming flow, due to the long distance from the root of the existing support to the top in contact with the duct, and the influence of the walls at both ends, the unevenness of the flow in the radial direction behind the support is often very large. Large, it is easy to cause partial premature cavitation of the propeller, the decrease of propulsion efficiency, and the increase of bearing force, which greatly affects the hydrodynamic performance and cavitation performance of the propeller

Method used

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  • Ducted propeller support partition pre-swirl deflector
  • Ducted propeller support partition pre-swirl deflector
  • Ducted propeller support partition pre-swirl deflector

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The deflector 3 is located between the deflector ring and the inner wall of the conduit 6 .

[0047] The outer guide vane 33 is fixed on the inner wall of the duct 6, and the inner guide vane 34 is embedded on the wall of the guide ring; the adjustment mechanism 9 is installed between the guide ring and the inner guide vane 34, and the worm wheel 91 moves along Tangentially through the inner guide vane 34 wall, one end of the worm 92 meshes with the worm wheel 91, and the other end of the worm 92 extends to the outside of the guide ring.

[0048] The inner guide vane 34 is provided with a through groove 341 for the worm wheel 91 to pass through, and the inner top surface of the through groove 341 is provided with a circular hole penetrating upwards, and the rotating shaft 32 at the bottom of the movable guide vane 31 is accommodated in the circular hole.

Embodiment 2

[0050] The deflector 3 is located between the deflector ring and the outer wall of the propeller hub 7 .

[0051] The inner guide vane 34 is fixed on the outer wall surface of the propeller hub 7, the outer guide vane 33 is embedded on the wall surface of the guide ring; the adjustment mechanism 9 is installed between the guide ring and the outer guide vane 33, and the worm wheel 91 moves along The tangential direction of the ring runs through the wall of the outer guide vane 33 , one end of the worm 92 meshes with the worm wheel 91 , and the other end of the worm 92 extends to the outside of the guide ring.

[0052] The guide ring and the guide vane 3 located inside or outside the guide ring realize the partition inside the ducted propeller. Through the partition pre-rotation guide device, especially the adjustable guide vane 3, the flow field in the area is realized. The flexible adjustment of the uniformity not only improves the propulsion efficiency of the propeller, but a...

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PUM

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Abstract

The invention relates to a pre-swirling deflector for ducted paddle support partitions, including a paddle hub, a plurality of paddle supports are evenly distributed along the circumferential direction on the wall surface of the paddle hub, a plurality of paddle support outer ends are jointly installed with a conduit, and the end of a single paddle support is connected to the conduit Fixed installation, multiple propeller supports located between the propeller hub and the duct are jointly embedded with a guide ring, the propeller hub, guide ring and guide tube are axially concentric, located on the guide ring between adjacent propeller supports along the Guide vanes are installed radially; the guide vanes include inner guide vanes and outer guide vanes located at both ends, and movable guide vanes are installed in rotation between the outer guide vanes and inner guide vanes; the movable guide vanes are driven by the adjustment mechanism Relative to the deflection of the inner guide vane and the outer guide vane; the invention realizes the flexible adjustment of the uniformity of the flow field by installing the pre-rotation guide device, especially the adjustable guide vane, which not only improves the propulsion efficiency, but also greatly improves the vibration And cavitation performance, and effectively strengthen the strength of the overall structure.

Description

technical field [0001] The invention relates to the technical field of ducted propeller propellers, in particular to a ducted propeller supporting zone pre-swirl deflector. Background technique [0002] In the prior art, ducted propellers or combined propellers with ducts have a single supporting structure, which is generally composed of a flat plate without an angle of attack or a wing plate with a certain angle of attack with the incoming flow. Certain rectification and pre-rotation effects. However, when the ducted propeller is located behind the ship, under the action of multi-directional incoming flow, due to the long distance from the root of the existing support to the top in contact with the duct, and the influence of the walls at both ends, the unevenness of the flow in the radial direction behind the support is often very large. Large, it is easy to cause partial premature cavitation of the propeller, decrease of propulsion efficiency, and increase of bearing forc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B63H5/15
CPCB63H5/15
Inventor 周斌李亮王磊李立业
Owner CHINA SHIP SCIENTIFIC RESEARCH CENTER (THE 702 INSTITUTE OF CHINA SHIPBUILDING INDUSTRY CORPORATION)
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