KR20170056205A - Light weight propeller for ship and manufacturing method of this propeller - Google Patents

Light weight propeller for ship and manufacturing method of this propeller Download PDF

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Publication number
KR20170056205A
KR20170056205A KR1020150159549A KR20150159549A KR20170056205A KR 20170056205 A KR20170056205 A KR 20170056205A KR 1020150159549 A KR1020150159549 A KR 1020150159549A KR 20150159549 A KR20150159549 A KR 20150159549A KR 20170056205 A KR20170056205 A KR 20170056205A
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KR
South Korea
Prior art keywords
propeller
overlay
blade
core
winding
Prior art date
Application number
KR1020150159549A
Other languages
Korean (ko)
Inventor
이강복
Original Assignee
알라딘기술 주식회사
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Publication date
Application filed by 알라딘기술 주식회사 filed Critical 알라딘기술 주식회사
Priority to KR1020150159549A priority Critical patent/KR20170056205A/en
Publication of KR20170056205A publication Critical patent/KR20170056205A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H1/00—Propulsive elements directly acting on water
    • B63H1/02—Propulsive elements directly acting on water of rotary type
    • B63H1/12—Propulsive elements directly acting on water of rotary type with rotation axis substantially in propulsive direction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/56—Winding and joining, e.g. winding spirally
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D99/00—Subject matter not provided for in other groups of this subclass
    • B29D99/0025—Producing blades or the like, e.g. blades for turbines, propellers, or wings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H5/00—Arrangements on vessels of propulsion elements directly acting on water
    • B63H5/07—Arrangements on vessels of propulsion elements directly acting on water of propellers

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • Composite Materials (AREA)
  • Moulding By Coating Moulds (AREA)

Abstract

The present invention relates to a lightweight propeller for a ship, having a light weight due to a high strength composite material, to stably transfer rotary power while miniaturizing the specifications of a shaft, which transfers the rotary power to a propeller, etc., and a manufacturing method thereof. According to the present invention, the propeller comprises: a boss including multiple blade connection parts formed around the outer circumference; and a blade connected to each blade connection part of the boss. The blade comprises: a core unit in a shape of a curved flat plate; an overlay unit to cover one or both surfaces of the core unit, and formed with multiple layers made of carbon fiber fabric, glass fiber fabric, or fiber reinforced plastic, wherein grain of each layer is alternately formed; and a winding unit formed by wining carbon or glass fiber multiple times together with the core unit and the overlay unit.

Description

TECHNICAL FIELD [0001] The present invention relates to a lightweight propeller for a ship,

The present invention relates to a lightweight propeller for a ship and a method of manufacturing the same, and more particularly, to a lightweight propeller for a ship, which is made of a high strength composite material so as to be lightweight, A lightweight propeller for a ship, and a method of manufacturing the same.

Ship propellers are made of non-ferrous materials such as nickel, aluminum and copper to ensure corrosion resistance and excellent strength. These materials are not only expensive but they are also very heavy.

On the other hand, there are various kinds of ship propellers, such as a fixed pitch propeller (FPP) fixed to a hub connected with a rotary shaft, a variable pitch propeller A contra-rotating propeller (CRP), which converts the rotational force exiting from a controllable pitch propeller (CPP) and a front propeller into a propelling force by a rear propeller rotating in a direction opposite to the front propeller, ).

Among them, the dual inversion propeller is excellent in the straightness of the route, low vibration, low noise, and excellent thrust of the propeller because the torque balance maintained by the propeller is increased and the heeling moment of the hull is decreased.

However, in the case of a double-inverted propeller, when the propeller is made of a non-ferrous material such as nickel, aluminum or copper, since the propeller is composed of two propellers before and after, it is necessary to increase the size of the shaft which supports the propeller and transmits the rotational force And there is a problem that a larger force is required to rotate the propeller.

KR 10-2015-0065081 A

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made to solve the above problems occurring in the prior art, and it is an object of the present invention to provide a lightweight propeller for a ship and a method of manufacturing the propeller by reducing the weight of the propeller by forming the propeller into a lightweight high strength composite material The purpose is to do.

According to a preferred embodiment of the present invention to solve the above-mentioned problems, a boss having a plurality of blade joints formed along an outer circumference and a blade joined to each blade joint of the boss, Includes: a core portion having a flat curved plate shape; An overlay part which is composed of a plurality of layers of carbon fiber fabric, glass fiber fabric or fiber reinforced plastic covering one side or both sides of the core part and in which the layers are staggered from each other; And a winding part formed by winding the carbon fiber or the glass fiber many times together with the core part and the overlay part.

According to another embodiment of the present invention, a lightweight propeller for a ship is provided, wherein the core portion is made of a hardened carbon fiber fabric, a glass fiber fabric or a fiber reinforced plastic.

According to another embodiment of the present invention, a lightweight propeller for a ship is provided, wherein a plurality of through holes are formed in the core portion.

According to another embodiment of the present invention, there is provided a lightweight propeller for a ship, wherein a part of the area between the core part and the overlay part or between some layers of the overlay part is interposed.

According to another embodiment of the present invention, a lightweight propeller for a ship is provided, wherein a connecting member connecting adjoining blades is located in the space between the blades.

According to another embodiment of the present invention, there is provided a lightweight propeller for a ship, wherein a metal coating layer is further formed on an outer surface of the winder.

According to another embodiment of the present invention, there is provided a method of manufacturing a semiconductor device, comprising the steps of: a) fabricating a flat, curved core portion; b) laminating a carbon fiber fabric, a glass fiber fabric or a fiber reinforced plastic on one side or both sides of the core part a plurality of times so as to stagger each other to form an overlay part; c) winding the core part and the overlay part together by carbon fiber or glass fiber several times to form a winding part; d) hot molding the core, the overlay and the entire winding to complete the blade; And e) assembling the blade with a boss. The present invention also provides a method of manufacturing a lightweight propeller for a ship.

According to another embodiment of the present invention, a step of forming a metal coating layer on the surface of the winding portion is further provided between steps d) and e).

According to still another embodiment of the present invention, the step of forming the covering member on the surface of the core portion or a part of the overlay portion is further performed during the step a) and the step b) or the step b) Of a lightweight propeller for a ship.

The marine propeller according to the present invention is formed in a light weight because all or part of the blades are made of fiber reinforced plastic and fibers. Accordingly, the size of the shaft for transmitting the rotational force to the propeller can be reduced and only a small amount of force is required to rotate the propeller.

The blades are stacked so that the overlay portions constituting the blades are composed of a plurality of layers and the streaks of the respective layers are staggered from each other. Since the fibers are wound many times around the overlay portions, the blades can be stably supported by even small shafts .

1 is a perspective view of a propeller for a ship according to the present invention and a sectional view of a blade constituting the propeller.
Fig. 2 is a perspective view of a case where the propeller further comprises a connecting member.
FIG. 3 shows a flowchart of a method for manufacturing a propeller for a ship according to the present invention.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a marine propeller and a method of manufacturing the same, and is characterized in that lightweight and excellent strength can be exhibited by using carbon fiber, glass fiber, and fiber reinforced plastic in combination.

The marine propeller according to the present invention is of particular utility in a double inverted propeller, but it is of course also applicable to other types of propellers.

Fig. 1 (a) is a perspective view of a marine propeller 1 according to the present invention, and Fig. 1 (b) is a sectional view of a blade 20 constituting the propeller 1. As shown in Fig.

The propeller 1 for a ship according to the present invention comprises a boss 10 having a plurality of blade joints formed along the outer circumference as a general propeller and a blade 20 joined to each blade joint of the boss 10 And each blade 20 includes a core portion 21, an overlay portion 22, and a winding portion 23.

The core portion 21 is positioned in the middle of the cross section of the blade 20 and has a generally curved surface shape similar to the shape of the blade 20 to serve as a skeleton of the blade 20. [

The core portion 21 is made of a plastic such as a hardened carbon fiber, glass fiber, Kevlar fiber, or aramid fiber, or reinforced by these fibers.

The fabrics and reinforced plastics described above are excellent in mechanical strength and heat resistance and light in weight, so that the blades can be formed to be light in weight while satisfying the required strength.

When the core portion 21 is made of the above-described kind of fabric, it is preferable that the core portion 21 is laminated with a plurality of layers in terms of improving the strength.

The core portion 21 is preferably formed with a bolt hole or the like for joining the blade 20 to the boss 10. In this case, the bolt hole portion may be formed of a metal.

The overlay portion 22 covers one side or both sides of the core portion 21 and is composed of a plurality of layers made of carbon fiber fabric, glass fiber fabric or fiber reinforced plastic. In addition, each layer constituting the overlay portion 22 is formed such that the teeth are staggered from each other.

Since the overlay portion 22 has a plurality of layers, the strength of the blades is further improved and the blades of the overlay portions 22 are staggered so that the blades can have excellent strength against loads acting in any direction do.

The overlay portion 22, like the core portion 21, may also be made of a fabric of Kevlar fiber or aramid fiber.

The winding part 23 is formed by winding the core part 21 and the overlay part 22 together with carbon fiber or glass fiber many times and includes an overlay part 22 and a core part 21, And the winding part 23 having a plurality of turns is formed of a plurality of layers, so that the strength of the blade is further enhanced.

As the fiber, carbon fiber, glass fiber, Kevlar fiber or aramid fiber can be used.

As described above, the propeller 1 according to the present invention is lightweight and has excellent strength because the blade is made of fiber reinforced plastic or fiber. Accordingly, even if the size of the shaft supporting the propeller is reduced, the propeller can be stably supported and a relatively small force is required to rotate the propeller.

The core portion 21 may include a plurality of through holes 21a.

The through hole 21a is formed in the surface of the core portion 21 so as to increase the adhesion of the overlay portion 22 to the core portion 21 and to increase the adhesion of the fiber reinforcement 22 constituting the overlay portion 22 And contributes to the integration of the overlay portions 22 when the overlay portions 22 are formed on both sides of the core portion 21 by the inflow of the plastic.

A small projection may be formed in the core portion 21 instead of a through hole.

A covering member 24 may be interposed between the core portion 21 and the overlay portion 22 or between some layers of the overlay portion 22. [

The thickness of the blades 20 varies over the entire area, and the covering members 24 are interposed in a portion where the thickness of the blades is to be formed to control the thickness of the blades.

The covering member 24 may be made of a material such as urethane or the like and may have a volume, or may be formed by laminating the same material as the material of the overlay portion 22 a plurality of times.

A metal coating layer 25 may be further formed on the outer surface of the winding portion 23.

The metal coating layer 25 smoothes the surface of the blade 20, thereby reducing the blurring phenomenon caused when the propeller is rotated, and can further increase the surface strength of the blade.

A connecting member 30 connecting the adjacent blades 20 may be located in the space between the blades 20. 2 is a perspective view of a propeller 1 further comprising a connecting member 30. As shown in Fig.

Different forces may be applied to each blade of the propeller depending on the shape of the ship or water depth. The connecting member 30 connects each blade 20 to prevent a large deformation from occurring in only one of the blades.

It is preferable that the connecting member 30 is formed to match the curved surface angle of the adjacent blades 20 so as to reduce the resistance with water.

The connecting member 30 may be made of a metal or a fiber reinforced plastic and may be integrally formed with the core portion 21 for firm connection between the connecting member 30 and the blade 20, 23 can be formed.

Hereinafter, a method of manufacturing a marine propeller as described above will be described in detail. Fig. 3 shows a flowchart of a propeller manufacturing method for a marine vessel.

A method for manufacturing a marine propeller according to the present invention comprises the steps of: a) fabricating a flat curved core portion (21); b) forming an overlay portion 22 by laminating a plurality of carbon fiber fabrics, glass fiber fabrics or fiber-reinforced plastics on one side or both sides of the core portion 21 so as to stagger each other, step; c) winding the core part (21) and the overlay part (22) together several times with carbon fiber or glass fiber to form a winding part (23); d) high temperature molding the whole of the core part (21), the overlay part (22) and the winding part (23) to complete the blade (20); And e) assembling the blade (20) with the boss (10).

Hereinafter, each step of the propeller manufacturing method will be described in detail. Since the boss of the propeller is not so different from that of the general propeller, the method of manufacturing the boss is not described separately.

a) fabricating the core portion 21;

A core portion 21 to be a skeleton of the blade 20 is manufactured.

As described above, the core portion 21 has a flat curved plate shape and is made of a fabric of various fibers or a fiber reinforced plastic.

When the core portion 21 is made of a fabric of various kinds of fibers, the fiber-reinforced plastic is laminated a plurality of times in a frame having the same space as that of the core portion 21.

A bolt hole or the like may be formed in the core portion 21 to bond the blade 20 to the boss. When the propeller having the connecting member 30 is manufactured, The joint portion is formed so as to protrude integrally with the body of the core portion 21. The bolt hole and the like for joining with the boss must not be closed to the overlay portion 22 and the winding portion 23 even if the subsequent steps are performed.

b) forming an overlay portion (22);

An overlay part 22 made of a fiber reinforced plastic or the like is formed on one side or both sides of the core part 21 manufactured in step a).

The overlay portion 22 is formed by stacking a plurality of fiber-reinforced plastics or the like many times so that the grain of each layer is staggered from each other, so that the blade can have a high strength against a force acting in any direction.

It is preferable that the overlay portion 22 has about 10 layers.

Since the overlay portion 22 is formed on the core portion 21 formed as a curved plate close to the shape of the already designed blade, this step can be carried out without a separate frame.

The step of forming the covering member 24 on the surface of the core portion 21 or a part of the overlay portion 22 may be further carried out during the step a) and the step b) or the step b) .

The covering member 24 is a member for changing the thickness of the cross section of the blade 20 as described above. The covering member 24 is a member for covering the cover core portion 21 and the overlay portion 22 by the overlay portion 22 laminated on the core portion 21. [ (Not shown).

When the covering member 24 is made of the same material as the overlay portion 22, the overlay portion 22 may be formed by attaching the member to a predetermined position. And a carbon fiber-reinforced plastic or the like is laminated only on a predetermined portion.

c) forming a winding part (23);

The core portion 21 and the overlay portion 22 are wound together a plurality of times by carbon fiber or glass fiber to form a winding portion 23. [

The winding part 23 is formed by bundling and integrating the formed core part 21 and the overlay part 22 so that each layer of the overlay part 22 and the overlay part 22 and the core part 21 are more closely contacted. It does.

d) high temperature molding step;

The core portion 21, the overlay portion 22 and the winding portion 23 are entirely subjected to high-temperature molding to complete the blade 20.

The constituent parts of the blade 20 may be formed of different materials and are composed of a plurality of layers, so that there may be a minute gap or a complete integration between the constituent parts or each layer.

In this step, the overlay 22 and the core 21, the overlay 22 and the winding 23 are in close contact with each other while softening the fiber-reinforced plastic, So that the integrity of the blade constituent parts is further improved.

The temperature of the high-temperature molding should be such that the fiber-reinforced plastic is softened but not completely melted.

e) blade assembly step;

By completing the steps a) to d), the completed blade 20 is assembled with the boss 10 to complete the propeller.

The blade 20 and the boss may be joined by bolting the bolt to the bolt hole formed in the core portion 21 of the blade 20 or by welding when the core portion 21 is made of metal.

Between step d) and step e), a step of forming a metal coating layer 25 on the surface of the winding part 23 may be further performed.

This step may be performed by conventional methods of thinly coating the surface of an object with a metal.

Between the step d) and the step e), the surface of the winding part 23 may be further polished and smoothed.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. And thus fall within the scope of the present invention.

1: Propeller 10: Boss
20: blade 21: core part
21a: Through hole 22: Overlay part
23: winding part 24:
25: metal coating layer 30: connecting member

Claims (9)

A boss (10) having a plurality of blade joints formed along the outer periphery, and a blade (20) joined to each blade joint of the boss (10)
The blade (20)
A core portion 21 in the form of a flat curved plate;
An overlay part 22 covering the one side or both sides of the core part 21 and composed of a plurality of layers made of a carbon fiber fabric, a glass fiber fabric or a fiber reinforced plastic, and having a staggered configuration of the layers; And
And a winding part (23) formed by winding the carbon fiber or the glass fiber many times together with the core part (21) and the overlay part (22).
The method according to claim 1,
Characterized in that the core portion (21) is made of a hardened carbon fiber fabric, a glass fiber fabric or a fiber reinforced plastic.
The method according to claim 1,
And a plurality of through holes (21a) are formed in the core portion (21).
The method according to claim 1,
Characterized in that a part of the gap between the core part (21) and the overlay part (22) or a part of the overlay part (22) is interposed therebetween.
The method according to claim 1,
Characterized in that a connecting member (30) connecting adjacent blades (20) is located in the space between the blades (20).
The method according to claim 1,
And a metal coating layer (25) is further formed on the outer surface of the winding part (23).
a) fabricating a flat, curved core portion (21);
b) forming an overlay portion 22 by laminating a plurality of carbon fiber fabrics, glass fiber fabrics or fiber-reinforced plastics on one side or both sides of the core portion 21 so as to stagger each other, step;
c) winding the core part (21) and the overlay part (22) together several times with carbon fiber or glass fiber to form a winding part (23);
d) high temperature molding the whole of the core part (21), the overlay part (22) and the winding part (23) to complete the blade (20); And
e) assembling the blade (20) with the boss (10).
8. The method of claim 7,
Wherein the step of forming the metal coating layer (25) on the surface of the winding portion (23) is further performed between the step d) and the step e).
8. The method of claim 7,
It is preferable that the step of forming the covering member 24 on the surface of the core portion 21 or a part of the overlay portion 22 is further performed during the step a) and the step b) A method of making a lightweight propeller for a ship.
KR1020150159549A 2015-11-13 2015-11-13 Light weight propeller for ship and manufacturing method of this propeller KR20170056205A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020525356A (en) * 2017-06-29 2020-08-27 シーエヌアイエム グループ Propeller pump type hydraulic propulsion device and ship equipped with the device
CN111976936A (en) * 2020-08-18 2020-11-24 安徽志恒智能装备制造有限公司 Efficient propeller for steamship and production process

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020525356A (en) * 2017-06-29 2020-08-27 シーエヌアイエム グループ Propeller pump type hydraulic propulsion device and ship equipped with the device
CN111976936A (en) * 2020-08-18 2020-11-24 安徽志恒智能装备制造有限公司 Efficient propeller for steamship and production process
CN111976936B (en) * 2020-08-18 2021-07-16 安徽志恒智能装备制造有限公司 Efficient propeller for steamship and production process

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