JPWO2017018357A1 - Rudder arrangement structure of ship - Google Patents

Abstract

Provided is a rudder arrangement structure for a ship that can shorten the rudder cord length and facilitate stern arrangement while achieving both maneuverability and propulsion performance. A rudder arrangement structure of a ship having one propeller and a plurality of rudders, wherein a plurality of rudder rotation shafts are provided asymmetrically in the propeller surface of the propeller, and a plurality of rudders are asymmetrical in the propeller surface of the propeller Deploy. In a ship having one propeller 1 and two rudders 10 and 11, the rotation axis A10 of one rudder 10 of the two rudders is provided in the center of the propeller surface 3, and the rotation axis A11 of the other rudder 11 is propeller. Provided on the side where the propeller 1 descends (the starboard S side) during rotation in the plane 3. [Selection] Figure 1

Description

  The present invention relates to a rudder arrangement structure for a ship.

Conventionally, as shown in FIG. 8, a propeller 1 attached to a propeller shaft 2 and a rudder 100 attached to a rudder horn 4 are arranged on a stern portion of a hull 5 of a ship. It is designed to rotate around A. Here, there is the code length is Longitudinal length as the shape elements of the rudder, than the code length L ₁ of the rudder 100a shown in FIG. 8 (a), the code length of the rudder 100b shown in FIG. 8 (b) L ₂ is shorter. Further, the propeller 1 in FIG. 8B is located behind the propeller 1 in FIG.

  On the other hand, regarding the arrangement of the propeller and the rudder, in a ship having one propeller and one rudder, as shown in FIG. 9, the rudder 100 is located on the hull center line C behind the propeller 1 (on the extension line of the propeller shaft 2). Is placed. FIG. 9A is a view of the arrangement of the propeller and the rudder as seen from the rear of the hull, and FIG. 9B is a view of the arrangement of the propeller and the rudder as seen from above the hull. Reference numeral 3 indicates a propeller surface drawn by the propeller 1 during rotation, and an arrow around the propeller surface 3 indicates a rotation direction of the propeller 1. Moreover, the code | symbol P has shown the port direction, and the code | symbol S has shown the starboard direction.

Further, regarding the arrangement of the propeller and the rudder, in a ship having one propeller and two rudders, as shown in FIG. 10, the hull center line C (an extension line of the propeller shaft 2) behind the propeller 1 is directed to both sides. The rudder 101, 102 is arranged at a position separated by an equal distance (D ₁₀₁ = D ₁₀₂ ). FIG. 10A is a view of the arrangement of the propeller and the rudder as seen from the rear of the hull, and FIG. 10B is a view of the arrangement of the propeller and the rudder as seen from above the hull. Reference numeral 3 indicates a propeller surface drawn by the propeller 1 during rotation, and an arrow around the propeller surface 3 indicates a rotation direction of the propeller 1. Moreover, the code | symbol P has shown the port direction, and the code | symbol S has shown the starboard direction. Therefore, the rudders 101 and 102 are in a state of being symmetrically disposed in the propeller surface 3 of the propeller 1.

  Further, regarding the arrangement of the propeller and the rudder, Patent Document 1 and Patent Document 2 describe an invention in which rudders are disposed on both sides of the hull separately from one rudder arranged on the hull center line behind the propeller. ing.

  Patent Document 3 describes an invention in which the left and right rudder is twisted to make the rudder itself asymmetrical, thereby reducing the resistance caused by the propeller wake behind the rudder and improving the propulsion performance. Has been.

Japanese Utility Model Publication No. 4-1098 Japanese Utility Model Publication No. 61-171691 JP 2010-95239 A

  By the way, when the total length of the ship is restricted due to port restrictions, etc., it is difficult to arrange the propeller and rudder, and when the stern enlargement due to the enlargement of the hull form and the main engine increases, the performance deteriorates and it is difficult to improve the performance. is there.

  On the other hand, as shown in FIG. 8B, if the rudder cord length can be shortened, the stern arrangement can be facilitated and the degree of stern enlargement can be reduced. As a result, the maneuvering performance will deteriorate.

  On the other hand, it is conceivable to improve the steering performance by increasing the number of rudder like the rudder 101, 102 shown in FIG. 10 or the rudder added to the both sides of the hull shown in Patent Document 1 and Patent Document 2. An increase in the number of rudder leads to deterioration in propulsion performance.

  The invention described in Patent Document 3 is intended to improve propulsion performance by making the left and right rudder shapes asymmetrical to the left and right, and is not intended to improve steering performance.

  The present invention solves the above-described conventional problems, and provides a rudder arrangement structure for a ship capable of achieving both maneuverability and propulsion performance while shortening the cord length of the rudder to facilitate stern arrangement. Is.

  In order to solve the above problems, a rudder arrangement structure of a ship according to the present invention is a rudder arrangement structure of a ship having one propeller and a plurality of rudders, and the rotation shafts of the plurality of rudders are in the propeller plane of the propeller. The rudder is provided in a laterally asymmetric manner, and the plurality of rudders are arranged in a laterally asymmetric manner in a propeller surface of the propeller.

  “To provide the rudder's rotation axis in the propeller plane” means that the propeller surface drawn when the propeller rotates when the horizontal position (position in the hull width direction) of the rudder's rotation axis is viewed from the rear of the hull. It is included within the range in the left-right direction. Also, “the rudder's rotation axis is asymmetrical” means that the position of the rudder's rotation axis in the left-right direction (the position in the hull width direction) is viewed from the rear of the hull, and the center of the propeller surface is the reference. This means that the positions of the rotation axes of the left and right rudder are not symmetrical.

  Similarly, “arrange the rudder in the propeller plane” means the range of the propeller plane drawn in the horizontal direction of the propeller when the rudder's horizontal position (position in the hull width direction) is viewed from the rear of the hull. It is contained within. In addition, “arrange the rudder asymmetrically” means the position of the left and right rudder when the position of the rudder in the left-right direction (position in the hull width direction) is viewed from the rear of the hull, with the center of the propeller surface as the reference. Is not symmetric.

  Preferably, the rotation axis of one rudder among the plurality of rudders is provided in the center of the propeller surface.

  Preferably, a rotation axis of a rudder other than the rudder provided with a rotation axis at the center in the propeller plane is provided on either the left or right side in the propeller plane.

  Preferably, a rotation shaft of a rudder other than the rudder provided with a rotation shaft in the center of the propeller surface among the plurality of rudders is provided on a side where the propeller descends when rotating in the propeller surface. To do.

  Preferably, the rotation axis of one rudder among the plurality of rudders is provided on the left or right side in the propeller surface with a space from the center, and the rotation axes of the remaining rudder among the rudder are It is characterized in that it is provided on the opposite side of the propeller surface with a larger distance from the center.

  Preferably, the plurality of rudders are two.

  According to the present invention, in a rudder arrangement structure of a ship having one propeller and a plurality of rudders, a plurality of rudders are provided on the propeller surface of the propeller in a left-right asymmetric manner, thereby providing a plurality of rudders with a propeller surface of the propeller. Since it can arrange | position asymmetrically in the inside, the rectification | straightening effect of the propeller backflow by the propeller rotating in one direction can be acquired. Therefore, when the cord length of the rudder is shortened to facilitate the stern arrangement, the maneuvering performance is improved as compared with one rudder, and the propulsion performance is less likely to be deteriorated than when the plural rudders are arranged symmetrically. Further, since the cord length of the rudder can be shortened to facilitate the stern arrangement and an elongated hull form with a small resistance can be designed, the propulsion performance of the hull itself can be improved.

  Moreover, when the rotation axis of one rudder is provided in the center in the propeller plane among the plurality of rudders, the rudder disposed in the center is arranged in the center in the propeller plane. Can bring out more performance.

  In addition, when the rotation axis of a rudder other than the rudder provided with a rotation axis in the center of the propeller surface is provided on either the left or right side of the propeller surface, the multiple rudder can be easily left and right. It can be arranged asymmetrically.

  In addition, when a rotation shaft of a rudder other than the rudder provided with a rotation shaft in the center of the propeller surface is provided on the side where the propeller descends during rotation within the propeller surface, the rotation is performed in one direction. The propeller rectification effect of the propeller wake can be enhanced, and the steering performance and propulsion performance can be made compatible at a high level.

  In addition, a rotation axis of one rudder among the plurality of rudder is provided on either side of the propeller surface at a distance from the center, and a rotation axis of the remaining rudder among the plurality of rudder is opposite to the propeller surface. If the rudder is provided at a larger distance from the center, a plurality of rudder can be easily arranged asymmetrically even if the rudder is not arranged at the center.

  Further, when there are two rudders, since the number of rudders is small, they can be arranged asymmetrically without making the structure too complicated.

  As described above, according to the present invention, it is possible to provide a rudder arrangement structure for a ship that can shorten the rudder cord length and facilitate stern arrangement while achieving both maneuverability and propulsion performance.

It is a figure which shows the rudder arrangement structure of the ship which concerns on Embodiment 1 of this invention. It is a figure which shows the rudder arrangement structure of the ship which concerns on Embodiment 2. FIG. It is a figure which shows the rudder arrangement structure of the ship which concerns on Embodiment 3. FIG. It is a figure which shows the rudder arrangement structure of the ship which concerns on Embodiment 4. FIG. It is a figure which shows the rudder arrangement structure of the ship which concerns on Embodiment 5. FIG. It is a figure which shows the rudder arrangement structure of the ship which concerns on Embodiment 6. FIG. It is a figure which shows the rudder arrangement structure of the ship in an Example and a comparative example. It is a side view which shows the stern part of a ship. It is a figure which shows the rudder arrangement structure of the ship which concerns on a prior art example. It is a figure which shows the rudder arrangement structure of the ship which concerns on a prior art example.

  Next, with reference to FIG. 1 thru | or FIG. 6, the rudder arrangement structure of the ship which concerns on embodiment of this invention is demonstrated. First, matters common to the following first to sixth embodiments will be described.

  The following embodiment relates to an arrangement structure of the propeller 1 and the rudder 100 arranged at the stern portion of the hull 5 of the ship shown in FIG. And by using the rudder 100b with a short cord length as shown in FIG. 8 (b) for the rudder 100a with a long cord length as shown in FIG. And propulsion performance. In FIG. 8, only one rudder is shown, but the following embodiments are arranged with a plurality of rudders for one propeller.

  Further, in each of FIGS. 1 to 6, (a) is a view of the arrangement of the propeller and the rudder as seen from the rear of the hull, and (b) is a view of the arrangement of the propeller and the rudder as seen from above the hull. . Reference numeral 3 indicates a propeller surface drawn by the propeller 1 during rotation, and an arrow around the propeller surface 3 indicates a rotation direction of the propeller 1. Moreover, the code | symbol P has shown the port direction, and the code | symbol S has shown the starboard direction. Moreover, the code | symbol A has shown the rotating shaft of each rudder. And the position in the left-right direction (position in the hull width direction) of each rudder is determined by where the rotation axis A is provided in the left-right direction.

  Each drawing is intended to explain the position where the rudder is placed, and for the sake of simplicity, the rudder has a quadrilateral shape. Of course it is possible. Moreover, in this embodiment, the shape and magnitude | size of several rudder shall be the same, and shall move interlockingly.

FIG. 1 is a view showing a rudder arrangement structure for a ship according to the first embodiment. Two rudders 10 and 11 are arranged behind the propeller 1. The rudders 10 and 11 are attached to the ladder horns 4 and 4 so as to rotate about the rotation axes A ₁₀ and A ₁₁ , respectively. The two rotation axes A ₁₀ and A ₁₁ are both provided in the propeller surface 3 of the propeller 1 in the left-right direction (the port-side P direction and the starboard-S direction). Of the two rotation axes A ₁₀ and A ₁₁ , one rotation axis A ₁₀ is provided at the center in the left-right direction within the propeller surface 3 (on the hull center line C behind the propeller 1). The other rotation shaft A ₁₁ is provided on the right side (starboard S side) in the propeller surface 3 with a space D ₁₁ between the rotation shaft A ₁₁ and the rotation shaft A ₁₀ . The two rotation axes A ₁₀ and A ₁₁ are provided asymmetrically in the propeller surface 3. As is apparent from the direction of rotation of the propeller 1, the rotary shaft A ₁₁ is starboard S side provided is the side which the propeller 1 is lowered at the time of rotation of the propeller 1.

In this way, by providing the two rotational axes A _10, A ₁₁ asymmetrically into the propeller plane 3, rudder 10 and 11 are arranged asymmetrically in the propeller plane 3.

FIG. 2 is a diagram illustrating a rudder arrangement structure of a ship according to the second embodiment. Two rudders 20 and 21 are arranged behind the propeller 1. The rudder 20 and 21 are attached to the ladder horns 4 and 4 so as to rotate about the rotation axes A ₂₀ and A ₂₁ , respectively. The two rotation shafts A ₂₀ and A ₂₁ are both provided in the propeller surface 3 of the propeller 1 in the left-right direction (the port P direction and the starboard S direction). Of the two rotating shafts A ₂₀ and A ₂₁ , one rotating shaft A ₂₀ is provided at the center in the left-right direction in the propeller surface 3 (on the hull center line C behind the propeller 1). The other rotation axis A ₂₁ is provided on the right side (starboard S side) in the propeller surface 3 with a space D ₂₁ between the rotation axis A ₂₀ and the rotation axis A ₂₀ . The two rotation axes A ₂₀ , A ₂₁ are provided asymmetrically in the propeller surface 3. As is apparent from the rotation direction of the propeller 1, the starboard S side on which the rotation axis A ₂₁ is provided is the side on which the propeller 1 descends when the propeller 1 rotates. Further, the rotation axis A ₂₁ in the second embodiment is arranged closer to the starboard S side than the rotation axis A _{11 in the} first embodiment (D ₁₁ <D ₂₁ ).

As described above, the two rotating shafts A ₂₀ and A ₂₁ are provided in the propeller surface 3 so as to be asymmetrical in the left-right direction, whereby the rudder 20, 21 is disposed in the propeller surface 3 asymmetrically in the left-right direction.

FIG. 3 is a diagram illustrating a rudder arrangement structure of a ship according to the third embodiment. Three rudders 30, 31, 32 are arranged behind the propeller 1. The rudder ₃₀ , ₃₁ , ₃₂ is attached to the ladder horns 4, 4, 4 so as to rotate about the rotation axes A ₃₀ , A ₃₁ , A ₃₂ , respectively. All of the three rotation axes A ₃₀ , A ₃₁ , A ₃₂ are provided in the propeller surface 3 of the propeller 1 in the left-right direction (the port P direction and the starboard S direction). Of the three rotary shafts A ₃₀ , A ₃₁ , A ₃₂ , one rotary shaft A ₃₀ is provided at the center in the left-right direction within the propeller surface 3 (on the hull center line C behind the propeller 1). Then, one of the remaining rotation shafts A ₃₁ is provided on the right side (starboard S side) in the propeller surface 3 with a space D ₃₁ between the rotation shaft A ₃₀ and the rotation shaft A ₃₀ . The other rotation axis A ₃₂ is provided on the right side (starboard S side) in the propeller surface 3 with a gap D ₃₂ between the rotation axis A ₃₀ and the rotation axis A ₃₀ . The three rotation axes A ₃₀ , A ₃₁ , A ₃₂ are provided in the left and right asymmetrical manner in the propeller surface 3. As is apparent from the rotation direction of the propeller 1, the starboard S side on which the rotation axes A ₃₁ and A ₃₂ are provided is the side on which the propeller 1 descends when the propeller 1 rotates.

As described above, the three rotating shafts A ₃₀ , A ₃₁ , A ₃₂ are provided in the propeller surface 3 so as to be laterally asymmetric, so that the rudder 30, 31, 32 is disposed in the propeller surface 3 so as to be laterally asymmetric.

FIG. 4 is a view showing a rudder arrangement structure of a ship according to the fourth embodiment. Three rudders 40, 41, 42 are arranged behind the propeller 1. The rudder ₄₀ , ₄₁ , ₄₂ is attached to the ladder horns 4, 4, 4 so as to rotate about the rotation axes A ₄₀ , A ₄₁ , A ₄₂ , respectively. All of the three rotation axes A ₄₀ , A ₄₁ , A ₄₂ are provided in the propeller surface 3 of the propeller 1 in the left-right direction (the port P direction and the starboard S direction). Of the three rudders, one rotation axis A ₄₀ is provided at the center in the left-right direction in the propeller surface 3 (on the hull center line C behind the propeller 1). Then, one of the remaining rotation shafts A ₄₁ is provided on the right side (starboard S side) in the propeller surface 3 with a space D ₄₁ between the rotation shaft A ₄₀ and the rotation shaft A ₄₀ . The other rotation axis A ₄₂ is provided on the left side (left side P side) in the propeller surface 3 with a space D ₄₂ between the rotation axis A ₄₀ and the rotation axis A ₄₀ . The distance D ₄₁ > the distance D ₄₂ , and the three rotation axes A ₄₀ , A ₄₁ , A ₄₂ are asymmetrically provided in the propeller surface 3.

As described above, the three rotating shafts A ₄₀ , A ₄₁ , and A ₄₂ are provided in the propeller surface 3 so as to be laterally asymmetric, so that the rudder 40, 41, 42 is disposed in the propeller surface 3 in a laterally asymmetric manner.

FIG. 5 is a view showing a rudder arrangement structure of a ship according to the fifth embodiment. Two rudders 51 and 52 are arranged behind the propeller 1. The rudders 51 and 52 are attached to the ladder horns 4 and 4 so as to rotate about the rotation axes A ₅₁ and A ₅₂ , respectively. The two rotation axes A ₅₁ and A ₅₂ are both provided in the propeller surface 3 of the propeller 1 in the left-right direction (the port P direction and the starboard S direction). In the fifth embodiment, the rotation axis is not provided at the center in the left-right direction in the propeller surface 3 (on the hull center line C behind the propeller 1). Of the two rotation axes A ₅₁ and A ₅₂ , one rotation axis A ₅₁ is located on the right side (starboard S side) in the propeller surface 3 and in the center in the left-right direction (on the hull center line C behind the propeller 1). They are spaced apart D ₅₁ between. The other rotation axis A ₅₂ is provided on the left side (the port side P side) in the propeller surface 3 with a space D ₅₂ between the center in the left-right direction (on the hull center line C behind the propeller 1). ing. The distance D ₅₁ > the distance D ₅₂ , and the two rotation axes A ₅₁ , A ₅₂ are provided asymmetrically in the propeller surface 3. In other words, the rotation axis A ₅₁ is provided on the opposite side of the propeller surface 3 from the rotation axis A ₅₂ with a larger distance from the center. In addition, it is also possible to reverse the left and right intervals so that the interval D ₅₁ <the interval D ₅₂ .

In this way, by providing the two rotational axes A _51, A ₅₂ asymmetrically into the propeller plane 3, rudder 51 and 52 are arranged asymmetrically in the propeller plane 3.

FIG. 6 is a view showing a rudder arrangement structure of a ship according to the sixth embodiment. Two rudders 60 and 61 are arranged behind the propeller 1. The rudders 60 and 61 are attached to the ladder horns 4 and 4 so as to rotate about the rotation axes A ₆₀ and A ₆₁ , respectively. The two rotation axes A ₆₀ and A ₆₁ are both provided in the propeller surface 3 of the propeller 1 in the left-right direction (the port P direction and the starboard S direction). Of the two rotation axes A ₆₀ and A ₆₁ , one rotation axis A ₆₀ is provided at the center in the left-right direction in the propeller surface 3 (on the hull center line C behind the propeller 1). The other rotation axis A ₆₁ is provided on the left side (left side P side) in the propeller surface 3 with a gap D ₆₁ between the rotation axis A ₆₀ and the rotation axis A ₆₀ . The two rotation axes A ₆₀ and A ₆₁ are provided asymmetrically in the propeller surface 3. As is apparent from the rotation direction of the propeller 1, the port side P side on which the rotation axis A ₆₁ is provided is a side on which the propeller 1 rises when the propeller 1 rotates.

In this way, by providing the two rotational axes A _60, A ₆₁ asymmetrically into the propeller plane 3, rudder 60 and 61 are arranged asymmetrically in the propeller plane 3.

  Next, the effect in the said embodiment is demonstrated. In any one of the first to sixth embodiments, in the rudder arrangement structure of a ship having one propeller 1 and a plurality of rudders, the rotation shafts of the plurality of rudders are provided asymmetrically in the propeller surface 3 of the propeller 1. A plurality of rudders are arranged asymmetrically in the propeller surface 3 of the propeller 1. Since the rotation direction of the propeller 1 is one direction, in order to obtain a rectification effect with respect to the propeller wake by the propeller 1, the left-right asymmetry as in this embodiment is used instead of the conventional left-right symmetrical rudder arrangement structure. The rudder arrangement structure is suitable.

  According to the rudder arrangement structure of a ship according to Embodiments 1 to 6, it is possible to obtain a rectifying effect of the propeller wake by the propeller 1 rotating in one direction. Therefore, when the cord length of the rudder is shortened to facilitate the stern arrangement, the maneuvering performance is improved as compared with one rudder, and the propulsion performance is less likely to be deteriorated than when the plural rudders are arranged symmetrically. Further, since the cord length of the rudder can be shortened to facilitate the stern arrangement and an elongated hull form with a small resistance can be designed, the propulsion performance of the hull itself can be improved.

  Moreover, according to the rudder arrangement structure of the ship which concerns on Embodiment 1,2,3,4,6, by providing the rotating shaft of one rudder in the center in the propeller surface 3 among several rudder, several rudder Among them, one rudder can be arranged in the center of the propeller 3 surface, and the performance of the rudder arranged in the center can be further extracted.

  Moreover, according to the rudder arrangement structure of the ship which concerns on Embodiment 1,2,3,6, the rotating shaft of rudder other than the rudder which provided the rotating shaft in the center in the propeller surface 3 among several rudders is used for the propeller surface. By providing it on either the left or right side in 3, a plurality of rudders can be easily arranged left-right asymmetrically.

  Moreover, according to the rudder arrangement structure of the ship which concerns on Embodiment 1, 2, 3, the rotating shaft of rudder other than the rudder which provided the rotating shaft in the center in the propeller surface 3 among several rudders is set in the propeller surface 3. By providing the propeller 1 on the side where the propeller 1 descends during the rotation, the rectifying effect of the propeller wake by the propeller 1 rotating in one direction can be enhanced, and the steering performance and the propulsion performance can be made compatible at a high level.

  Further, according to the rudder arrangement structure of the ship according to the fifth embodiment, the rotation axis of one rudder among the plurality of rudders is provided on either the left or right side in the surface of the propeller 3 with an interval from the center. Even if the rudder is not placed in the center, the remaining rudder rotation shafts are placed on the opposite side of the propeller surface at a larger distance from the center, making it easy to place multiple rudder asymmetrical can do.

  Moreover, according to the rudder arrangement structure of the ship which concerns on Embodiment 1,2,6, since there are few rudder, it arrange | positions asymmetrically right and left, without making a structure so complicated by using several rudder. be able to.

  As mentioned above, according to the rudder arrangement structure of the ship concerning this embodiment, the rudder arrangement structure of a ship which can make steering performance and propulsion performance compatible while shortening the cord length of a rudder and making stern arrangement easy is provided. can do.

  In order to investigate the influence of the rudder arrangement behind the propeller, a resistance / self-propulsion test was conducted in the circulating water tank to evaluate the propulsion performance. FIG. 7 is a diagram showing a rudder arrangement structure of a ship in the example and the comparative example.

Example 1
As shown to Fig.7 (a), the two rudders 10 and 11 were arrange | positioned in the propeller surface 3 of the propeller back. Of the two rudders, one rudder 10 (rotation axis A ₁₀ ) is arranged at the center in the left-right direction in the propeller surface 3 (on the hull center line C behind the propeller 1), and another rudder 11 (rotation axis A). _11), on the right side of the propeller plane 3 (starboard S side), and spaced apart _{D 11} between the rudder 10 (rotation axis _{a 10).}
D ₁₁ = propeller surface 3 diameter × 0.211

(Example 2)
As shown in FIG. 7B, two rudders 60 and 61 are arranged in the propeller surface 3 behind the propeller. Of the two rudders, one rudder 60 (rotation axis A ₆₀ ) is arranged at the center in the left-right direction in the propeller surface 3 (on the hull center line C behind the propeller 1), and another rudder 61 (rotation axis A). _60), on the left side of the propeller plane 3 (the port P side), and spaced apart _{D 61} between the rudder 60 (rotation axis _{a 10).}
D ₆₁ = propeller surface 3 diameter × 0.211

(Comparative Example 1)
As shown in FIG. 7C, two rudders 101 and 102 are arranged in the propeller surface 3 behind the propeller. Of the two rudders, one rudder 101 (rotation axis A ₁₀₁ ) is located on the right side (starboard S side) in the propeller surface 3 and between the center in the left-right direction (on the hull center line C behind the propeller 1). and spaced _{D 101.} The other rudder 102 (rotation axis A ₁₀₂ ) has a distance D ₁₀₂ between the left side in the propeller surface 3 (on the port P side) and the center in the left-right direction (on the hull center line C behind the propeller 1). Arranged. The interval D ₁₀₁ = the interval D ₁₀₂ .
D ₁₀₁ = D ₁₀₂ = diameter of propeller surface 3 × 0.211

(Comparative Example 2)
As shown in FIG. 7D, two rudders 201 and 202 are arranged in the propeller surface 3 behind the propeller. Of the two rudders, one rudder 201 (rotation axis A ₂₀₁ ) is located on the right side (starboard S side) in the propeller surface 3 and between the center in the left-right direction (on the hull center line C behind the propeller 1). The interval D ₂₀₁ was arranged with a gap. The other rudder 202 (rotation axis A ₂₀₂ ) has a distance D ₂₀₂ between the left side (port side P side) in the propeller surface 3 and the center in the left-right direction (on the hull center line C behind the propeller 1). Arranged. The interval D ₂₀₁ = the interval D ₂₀₂ .
D ₂₀₁ = D ₂₀₂ = propeller surface 3 diameter × 0.141

  With respect to the above four rudder arrangements, the BHP (horsepower) -based propulsion performance improvement effect was measured based on Comparative Example 1. The measurement results are shown in Table 1.

  The improvement effect of about 5.2% in Example 1 was confirmed with respect to the comparative example 1 used as the reference. In Example 2, an improvement effect of about 3.6% was confirmed. This is an improvement in the self-propulsion factor of thrust reduction rate and wake coefficient due to the asymmetrical rudder arrangement. Moreover, it was confirmed that the propulsion performance is better when one rudder is arranged on the starboard S side with respect to the right rotating propeller.

  In addition, an improvement effect of about 4.5% was confirmed in Comparative Example 2 in which the two rudders were moved to the central portion with respect to Comparative Example 1 as a reference. As described above, when the two rudders are arranged symmetrically, the wake effect tends to be improved by bringing the two rudders to the center. Therefore, even when the two rudders are arranged asymmetrically in the propeller surface, it is considered that the propulsion performance can be further improved by reducing the distance between the two rudders.

  As mentioned above, although the rudder arrangement structure of the ship which concerns on embodiment of this invention was demonstrated, this invention is not necessarily limited to embodiment mentioned above, Other various changes are possible.

  For example, in the said embodiment, although the magnitude | size and shape of several rudder were made the same, it is good also as a different magnitude | size and a little shape.

  Further, although the plurality of rudders are moved in conjunction with each other, they may be moved independently.

  Further, although the propeller is rotated clockwise as viewed from the rear of the hull, it may be counterclockwise.

  Further, the number of the plurality of rudders may be four or more.

  Further, another rudder may be additionally arranged outside the propeller surface or in front of the propeller.

  In the present invention, “left-right asymmetric” means that the arrangement of the rudder with respect to the rotation axis of the rudder is left-right asymmetric, and that the shape of the left and right rudder itself is left-right asymmetric. It doesn't mean. However, as long as the arrangement of the rudder with respect to the rotation axis of the rudder is left-right asymmetric, the shape of the left and right rudder itself may be left-right asymmetric.

DESCRIPTION OF SYMBOLS 1 Propeller 2 Propeller shaft 3 Propeller surface 4 Ladder horn 5 Hull 10 Rudder 11 Rudder 20 Rudder 21 Rudder 30 Rudder 31 Rudder 32 Rudder 40 Rudder 41 Rudder 42 Rudder 51 Rudder 52 Rudder 60 Rudder 61 Rudder 100 Rudder 101 Rudder 102 Rudder 201 Rudder 202 Rudder A Rotating shaft

Claims (6)

  A rudder arrangement structure of a ship having one propeller and a plurality of rudders, wherein the rotation axes of the plurality of rudders are provided asymmetrically in the propeller plane of the propeller, and the plurality of rudders are within the propeller plane of the propeller. A ship rudder arrangement structure characterized by being arranged asymmetrically to the left and right.   The rudder arrangement structure of a ship according to claim 1, wherein a rotation shaft of one rudder among the plurality of rudders is provided in the center of the propeller surface.   The rotating shaft of a rudder other than the rudder provided with a rotating shaft at the center in the propeller surface among the plurality of rudders is provided on either the left or right side in the propeller surface. Rudder arrangement structure of the ship.   The rotation shaft of a rudder other than the rudder provided with a rotation shaft in the center of the propeller surface among the plurality of rudders is provided on a side where the propeller descends during rotation in the propeller surface. The rudder arrangement structure of the ship as described in 2.   Among the plurality of rudders, a rotation axis of one rudder is provided on either the left or right side in the propeller surface with a space from the center, and among the plurality of rudders, a rotation axis of the remaining rudder is disposed in the propeller surface. The rudder arrangement structure for a ship according to claim 1, wherein the rudder arrangement structure is provided on the opposite side with a larger interval from the center.   The rudder arrangement structure for a ship according to any one of claims 1 to 5, wherein the plurality of rudders are two.

Images