KR20140131767A - A rudder for a ship - Google Patents
A rudder for a ship Download PDFInfo
- Publication number
- KR20140131767A KR20140131767A KR20130050791A KR20130050791A KR20140131767A KR 20140131767 A KR20140131767 A KR 20140131767A KR 20130050791 A KR20130050791 A KR 20130050791A KR 20130050791 A KR20130050791 A KR 20130050791A KR 20140131767 A KR20140131767 A KR 20140131767A
- Authority
- KR
- South Korea
- Prior art keywords
- rudder
- bulb
- propeller
- rudder body
- respect
- Prior art date
Links
Images
Classifications
-
- 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
- B63H1/14—Propellers
- B63H1/28—Other means for improving propeller efficiency
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H25/00—Steering; Slowing-down otherwise than by use of propulsive elements; Dynamic anchoring, i.e. positioning vessels by means of main or auxiliary propulsive elements
- B63H25/06—Steering by rudders
- B63H25/38—Rudders
- B63H25/382—Rudders movable otherwise than for steering purposes; Changing geometry
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H25/00—Steering; Slowing-down otherwise than by use of propulsive elements; Dynamic anchoring, i.e. positioning vessels by means of main or auxiliary propulsive elements
- B63H25/06—Steering by rudders
- B63H25/38—Rudders
- B63H2025/388—Rudders with varying angle of attack over the height of the rudder blade, e.g. twisted rudders
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
Abstract
The rudder main body includes a rudder body rotatably installed at the rear of the propeller, and a rudder bulb installed at the rudder body. The rudder bulb has an asymmetrical shape at the left and right ridges, Thereby reducing the frictional resistance of the rudder bulb to the wake of the propeller and improving the propulsion efficiency of the propeller.
Description
BACKGROUND OF THE
In general, ships use rudders as means for adjusting the direction of travel.
Such a marine rudder comprises a rudder body rotatably mounted on the hull at the rear of the propeller and a rudder bulb installed in the rudder body.
When the rudder body rotates at a certain rudder angle and has a certain angle of attack in the flow of fluid, the vertical component of the lift acting on the rudder body is the tangent force Lt; / RTI >
In the prior art, cavitation occurs due to the characteristic of the wake of the propeller, that is, the resistance acting on the rudder due to the rotation of the propeller due to the rotation of the propeller, and the lift acting on the rudder is opposite to each other, The shape of the rudder has been improved due to the problem that the lateral force is lowered.
However, in the prior art, since the rudder bulb is formed in a bilaterally symmetrical shape, there is a problem that the wake of a propeller having an asymmetric flow velocity distribution can not be effectively rectified.
SUMMARY OF THE INVENTION It is an object of the present invention to provide a rudder for a marine vessel which can improve propulsion efficiency of a propeller by using a rudder body as a twisted structure.
In order to achieve the above object, the present invention provides a rudder structure comprising: a rudder body rotatably installed on a hull at a rear side of a propeller; and a rudder bulb installed in the rudder body, wherein the rudder bulb has an asymmetrical shape, The rudder body has a twisted structure in the vertical direction.
In addition, in the present invention, it is preferable that the rudder body is formed such that the twisted angle becomes gradually larger toward the upper and lower direction with respect to the center portion.
Further, in the present invention, it is preferable that the rudder body is twisted left and right by 5 degrees with respect to a vertical line.
Further, in the present invention, it is preferable that the gradient of the port is 1 to 30 degrees with respect to the bulb axis, and the gradient of the star is 0 to 15 degrees with respect to the bulb axis.
As described above, the present invention improves the structure of the rudder bulb to an asymmetrical shape, thereby reducing the frictional resistance of the rudder bulb to the wake of the propeller and improving the propelling efficiency of the propeller.
1 is a partial side view of a ship including a ship rudder according to the present invention.
2 is a plan view of a marine rudder according to the present invention.
3 shows a cross-sectional view of a rudder bulb according to the present invention.
4 is a side view of a rudder body according to the present invention.
5 is a front view of a rudder body according to the present invention.
Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a partial side view of a ship including a ship rudder according to the present invention, FIG. 2 is a plan view of a ship rudder according to the present invention, and FIG. 3 is a sectional view of a rudder bulb according to the present invention.
1, the present invention relates to a marine rudder mounted on the rear portion of a
When the
When the
A rudder body (20) is mounted on a rotatable rudder stock (21) to control the position of the rudder body (20).
The
The
Here, the
The asymmetry of the
That is, the
Here, the right-side bulb angle?, Which is the slope of the starboard, is 0 to 15 degrees with respect to the first reference line P1, and the left-side bulb angle? ~ 30 °.
That is, the right-side bulb angle? Is smaller than the left-side bulb angle?.
The
As described above, the
Therefore, the wake velocity of the
The
The wake of the propeller is oriented in correspondence with the rotation of the
Here, the
The
It is preferable that the
It is preferable that the
The asymmetric shape of the
The shape of the cross section of the
In the
That is, the asymmetry of the
Here, the inclination degrees of the
Next, look at the rudder body structure.
FIG. 4 is a side view of the rudder body according to the present invention, and FIG. 5 is a front view of the rudder body according to the present invention.
As shown in Figs. 4 and 5, the
Referring to each cross section of the
However, the
The
4 and 5, the symbol? Indicates the right twist angle in which the
The second
Accordingly, the
The present invention is not limited to the above-described embodiments, and many modifications may be made by those skilled in the art without departing from the scope of the present invention.
1: Ships
10: Propeller
11: rudder stock
12: Hub
20: rudder body
21: rudder stock
30: Rudder bulb
31: port side
32: starboard side
33:
34: Tapered part
40: rudder body front end portion
41: rudder body center
42: rudder body twist left side
43: rudder body twist right side
50: rudder body rear end
61: first rudder body section
62: second rudder body section
63: third rudder body section
100: Vertical line
200: Horizon
A: First section of bulb
B: 2nd section of bulb
C: Third section of bulb
J1: Rudder bulb Contact point between starboard and rudder body
J2: Contact point of rudder bulb port and rudder body
P1: first reference line
P2: Second baseline
α: starboard bulb angle
β: Positive valve angle
γ: Right twist angle
δ: Left twist angle
Claims (4)
Wherein a starboard bulb has an asymmetrical shape at the port side and the starboard side,
Wherein the rudder body has a twisted structure in a vertical direction.
Wherein the rudder body is formed such that the twisted angle gradually increases toward the up and down direction with respect to the center portion.
Wherein the rudder body is twisted left and right by 5 degrees with respect to a vertical line.
Wherein the port has a slope of 1 to 30 degrees with respect to a second reference line and a slope of 0 to 15 degrees with respect to a first reference line of the starboard.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR20130050791A KR20140131767A (en) | 2013-05-06 | 2013-05-06 | A rudder for a ship |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR20130050791A KR20140131767A (en) | 2013-05-06 | 2013-05-06 | A rudder for a ship |
Publications (1)
Publication Number | Publication Date |
---|---|
KR20140131767A true KR20140131767A (en) | 2014-11-14 |
Family
ID=52453033
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR20130050791A KR20140131767A (en) | 2013-05-06 | 2013-05-06 | A rudder for a ship |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR20140131767A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109070986A (en) * | 2016-03-31 | 2018-12-21 | 三井易艾斯造船有限公司 | Ship rudder and ship |
KR20190086201A (en) | 2018-01-12 | 2019-07-22 | 주식회사 파커이엔지 | High performance rudder for ship |
KR20210026136A (en) | 2019-08-29 | 2021-03-10 | (주)디에이취엠씨 | Rudder for ship having rudder bulb |
-
2013
- 2013-05-06 KR KR20130050791A patent/KR20140131767A/en not_active Application Discontinuation
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109070986A (en) * | 2016-03-31 | 2018-12-21 | 三井易艾斯造船有限公司 | Ship rudder and ship |
KR20190086201A (en) | 2018-01-12 | 2019-07-22 | 주식회사 파커이엔지 | High performance rudder for ship |
KR20210026136A (en) | 2019-08-29 | 2021-03-10 | (주)디에이취엠씨 | Rudder for ship having rudder bulb |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
WITN | Withdrawal due to no request for examination |