WO2022155864A1

WO2022155864A1 - Novel propulsion propeller for ship

Info

Publication number: WO2022155864A1
Application number: PCT/CN2021/073173
Authority: WO
Inventors: 王湘来; 王通; 纪炜
Original assignee: 镇江同舟螺旋桨有限公司
Priority date: 2021-01-22
Filing date: 2021-01-22
Publication date: 2022-07-28
Also published as: DE212021000002U1

Abstract

A propulsion propeller for a ship, comprising an inner propeller hub (1), wherein an outer hub (2) is provided outside the inner propeller hub (1), several inner propeller blades (3) are provided between the inner propeller hub (1) and the outer hub (2), several outer propeller blades (4) are provided on the outer wall of the outer hub (2), each outer propeller blade (4) comprises an inner side edge (41) and an outer side edge (42), several saw teeth (5) are provided on the inner side edge (41) of each outer propeller blade (4), several convex ribs (6) are provided on the surface of each outer propeller blade (4), and the direction of each convex rib (6) is pointed from the center of the outer propeller blade (4) to the circumference of the outer propeller blade (4). The present invention can increase the efficiency of a propeller, reduce noise and increase the propulsion power of a ship.

Description

A new type of marine propulsion propeller

technical field

The utility model relates to a novel marine propulsion propeller.

Background technique

The propeller is the most widely used form of propeller on various ships at present. It can convert about 70% of the mechanical power into propulsion, and has the advantages of simple structure, low cost, convenient use and high efficiency. Entering the 21st century, the situation of environmental and energy problems has become more and more severe. As the main transportation force of commodity logistics, ship transportation consumes a lot of non-renewable energy and emits a lot of polluting gases and greenhouse gases in the process of shipping. In response to this situation, the International Maritime Organization has launched the ship design energy efficiency index, which has been enforced in 2013. Therefore, the development of ship hydrodynamic energy-saving technology is imminent. Improving propeller propulsion efficiency is one of the important development directions of ship hydrodynamic energy-saving technology.

Utility model content

The purpose of this utility model is to provide a new type of marine propulsion propeller with convenient connection in order to solve the above deficiencies of the prior art.

A new type of marine propulsion propeller comprises an inner propeller hub, an outer wheel hub is arranged outside the inner propeller hub, the inner propeller hub and the outer wheel hub are connected by a plurality of inner propeller blades, and a plurality of outer propeller blades are arranged on the outer wall of the outer wheel hub. , the outer blade includes an inner side and an outer side, the inner side of the outer blade is provided with a number of serrations, and the surface of the outer blade is provided with a number of outer ribs, the direction of the outer ribs is from The center of the outer blade points to the circumference of the outer blade.

As a further improvement, the helical direction of the inner blade is opposite to that of the outer blade.

As a further improvement, the number of the inner paddles is 2 to 6 pieces.

As a further improvement, the number of outer blades is 3 to 6 pieces.

As a further improvement, the number of external convex ribs is 2 to 6.

As a further improvement, the shape of the outer convex rib is a curved strip.

Beneficial effects:

The design of the utility model is ingenious, and the propeller of the utility model utilizes the principle of bionics, and the inner side of the outer blade is designed as a zigzag edge, which can not only improve the efficiency, but also effectively reduce the noise, and at the same time Improve propeller efficiency, reduce cavitation pulsation pressure and noise, and improve propeller propulsion efficiency through favorable mutual interference between protrusions;

The utility model adopts the structure that the inner propeller hub and the outer wheel hub are arranged in the vortex area of the propeller, and between the inner propeller hub and the outer wheel hub there are a number of inner propeller blades opposite to the helical direction of the outer propeller blades, so when the propeller rotates during use Push the water back, and the water between the inner hub and the outer hub flows forward, thus improving the condition of the low pressure water flow in front of the propeller, limiting the eddy current in the area of the propeller, strengthening the wake behind the propeller, increasing the The reaction force of the propeller, thereby increasing its efficacy, in order to increase the speed of the ship.

The utility model is provided with an external convex rib on the surface of the outer blade, which mainly converts the centrifugal force into effective thrust, plays a role of paddling water, and increases the propulsion power of the ship when the propeller is in use.

Description of drawings

Figure 1 is a schematic diagram of the overall structure of a new type of marine propulsion propeller;

1. Inner hub 2. Outer hub 3. Inner blade 4. Outer blade 41. Inside edge 42. Outside edge 5. Saw tooth 6. Outer rib.

Detailed ways

In order to deepen the understanding of the present utility model, the present utility model will be described in further detail below with reference to the embodiments and the accompanying drawings. The embodiments are only used to explain the present utility model and do not constitute a limitation on the protection scope of the present utility model.

As shown in Figure 1, a new type of marine propulsion propeller includes an inner hub 1, an outer hub 2, an inner blade 3, an outer blade 4, an inner side 41, an outer side 42, a serration 5 and an outer rib 6.

A new type of marine propulsion propeller comprises an inner hub 1, an outer hub 2 is arranged outside the inner hub 1, the inner hub 1 and the outer hub 2 are connected by 2 to 6 inner blades 3, and the outer hub 2 is connected with the outer hub 2. There are 3 to 6 outer paddles 4 on the outer wall. The outer paddle 4 includes an inner side 41 and an outer side 42. A number of serrations 5 are arranged on the inner side 41 of the outer blade 4. There are 2 to 6 outer convex ribs 6 on the surface, the direction of the outer convex ribs 6 is from the center of the outer blade 4 to the circumference of the outer blade 4, and the shape of the outer convex ribs 6 is a curved strip. The helical direction of the inner blade 3 is opposite to that of the outer blade 4 .

The propeller of the present utility model utilizes the principle of bionics, and the inner side 41 of the outer blade 4 is designed as a zigzag-shaped side. This zigzag-shaped follower edge can not only improve the efficiency, but also can effectively reduce the noise and improve the efficiency of the propeller at the same time. Reduce cavitation pulsation pressure and noise, and improve propeller propulsion efficiency by generating favorable mutual interference between protrusions;

The present invention adopts the structure that the inner hub 1 and the outer hub 2 are arranged in the vortex area of the propeller, and between the inner hub 1 and the outer hub 2 there are a number of inner blades 3 whose helical directions are opposite to the outer blades 4. When in use, the propeller pushes the water backwards when it rotates, and the water between the inner propeller hub 1 and the outer hub 2 flows forward, thereby improving the condition of the low-pressure water flow in front of the propeller, limiting the eddy current in the area of the propeller hub, strengthening the The wake behind the propeller increases the reaction force of the propeller, thereby improving its efficacy and increasing the speed of the ship.

The utility model is provided with an outer rib 6 on the surface of the outer blade 4, which mainly converts the centrifugal force into an effective thrust, plays a role of paddling, and increases the propulsion power of the ship when the propeller is in use.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the within the scope of protection of the present invention.

Claims

A new type of marine propulsion propeller is characterized in that it comprises an inner hub, an outer hub is arranged outside the inner hub, the inner hub and the outer hub are connected by a plurality of inner blades, and the outer wall of the outer hub is provided with a plurality of inner blades. an outer blade, the outer blade includes an inner side and an outer side, the inner side of the outer blade is provided with a number of serrations, and the surface of the outer blade is provided with a number of outer convex ribs. The direction of the ribs is from the center of the outer blade to the circumference of the outer blade.
A new type of marine propulsion propeller according to claim 1, wherein the helical direction of the inner blade is opposite to that of the outer blade.
A new type of marine propulsion propeller according to claim 1, wherein the number of the inner blades is 2 to 6 pieces.
A new type of marine propulsion propeller according to claim 1, characterized in that the number of outer blades is 3-6 pieces.
A new type of marine propulsion propeller according to claim 1, characterized in that the number of the external protruding ribs is 2-6.
A new type of marine propulsion propeller according to claim 1, characterized in that the shape of the outer rib is a curved strip.