JP2005239083A - Pod type propulsion unit and vessel provided with this - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pod type propulsion unit and a vessel provided with this capable of eliminating cavitation generated on a strut of the pod type propulsion unit. <P>SOLUTION: The pod type propulsion unit 10 is provided with the strut 11 having a cross section made to a wing type shape; a pod 12 provided below the strut 11 and having a propeller shaft 4 transmitted with power from a driving means at the inside; and a pod propeller 14 provided on the propeller shaft 4. The strut 11 is fixed to a hull and the pod 12 is turnably provided on the strut 11. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a pod (POD) type propulsion device and a ship equipped with the same.

As a ship provided with a pod-type propulsion device, for example, there is one in which a pod-type propulsion device is additionally provided at a position not interfering behind the main propeller of the ship (for example, see Patent Document 1).
Japanese Patent Laid-Open No. 2003-231497 (see, for example, FIG. 1)

However, in the case of the above-mentioned Patent Document 1, especially when the pod type propulsion device has a rudder angle during high-speed navigation, intense cavitation occurs in the upper half of the strut S (which acts as a rudder) as shown in FIG. There was a problem that happened. In FIG. 8, reference numerals 2, 12, 13, and 14 denote a main propeller, a pod, a fin, and a pod propeller, respectively.
When such cavitation occurs, bubbles generated by cavitation flow downstream, are crushed by entering a high pressure region, and disappear (collapse). Since the disappearance of the bubbles is very instantaneous, it is accompanied by a large impact, which causes noise and hull vibration. Therefore, it is necessary to increase the design strength of the strut, and there is a problem that the manufacturing cost increases.
Also, if this state lasts for a long time, struts that are constantly subjected to repeated stress are gradually eroded so that the surface can be swept away by fatigue, and in the worst case, they will be destroyed. There is a fear.

  The present invention has been made in view of the above circumstances, and provides a pod-type propulsion device capable of eliminating (or reducing) cavitation generated in struts of a pod-type propulsion device and a ship equipped with the same. The purpose is to do.

The present invention employs the following means in order to solve the above problems.
The pod-type propulsion device according to claim 1 is a strut having a wing-shaped cross section, a pod provided below the strut and having a propeller shaft to which power from driving means is transmitted. A pod propeller provided on the propeller shaft, wherein the strut is fixed to the hull, and the pod is rotatably provided to the strut. It is characterized by being.
According to such a pod type propulsion device, only the pod is configured to be rotatable with respect to the hull, and the strut is fixed to the hull so that it does not take a rudder angle as in the past, and at high speed navigation. However, since no cavitation occurs in the struts, it is possible to eliminate noise and impact pressure generated when bubbles are collapsed by cavitation, and noise and hull vibration can be reduced.
In addition, it is not necessary to change the course of the ship by rotating the strut itself, and cavitation does not occur in the strut even during high-speed navigation, so the design strength of the strut can be reduced and the manufacturing cost can be reduced. Can be reduced.

The pod type propulsion device according to claim 2 is characterized in that a fin is provided below the pod and the fin is fixed to the strut.
According to such a pod type propulsion device, the fin is provided on the lower side of the pod (the side deeper than the strut), and this fin serves as a so-called center board so that the ship goes straight ahead. Will be improved.

The pod-type propulsion device according to claim 3 is a strut having a wing-shaped cross section, a pod having a propeller shaft that is provided below the strut and to which power from the driving means is transmitted. A pod propeller provided on the propeller shaft, wherein an upper half of the strut is fixed to a hull, and the lower half of the strut and the pod are respectively It is provided so as to be rotatable with respect to the upper half of the strut.
According to such a pod type propulsion device, the lower strut is configured so that the steering angle of the lower strut can be taken independently independently of the steering angle of the pod. The steering angle of the strut can be taken, and the turning performance of the ship during high-speed navigation can be improved.
In addition, as described with reference to FIG. 8, the upper strut in which cavitation is particularly intense is fixed to the hull, and cavitation does not occur in the upper strut even during high-speed navigation. Noise and impact pressure that occur sometimes can be eliminated, and noise and hull vibration can be reduced.
In addition, during mid- and low-speed navigation, the lower strut and the pod are set to have the same rudder angle, so that the lower strut can serve as a rudder, improving the turning performance of the ship. And at the time of berthing and berthing (especially when you want to move the ship approximately to the side), take the lower strut so that it is almost perpendicular to the hull stern of the hull. Since the resistance in movement can be reduced, the ship can be moved laterally quickly, and the time required for berthing and berthing can be shortened.
The boundary between the upper half of the strut and the lower half of the strut may be set at the substantially central portion in the strut height direction, and is not necessarily set at the central portion (50% position) in the strut height direction. It is not what has been done. That is, the boundary between the upper half of the strut and the lower half of the strut may be set, for example, at a position of 40% to 60% from the upper end of the strut.

The pod type propulsion device according to claim 4 is a strut having a wing-shaped cross section, a pod provided below the strut and having a propeller shaft to which power from driving means is transmitted. A pod-type propulsion device provided on the propeller shaft, wherein a front edge side half of the upper half of the strut is fixed to the hull, and among the upper half of the strut Each of the rear edge side half, the lower half of the strut, and the pod is provided so as to be rotatable with respect to the front edge side half of the upper half of the strut.
According to such a pod type propulsion device, the rear half of the upper half of the strut that does not generate severe cavitation even when the rudder angle is taken during high speed navigation can be further used as a rudder. The turning performance of the ship at the time can be improved.
The boundary between the upper half of the strut and the lower half of the strut may be set at the substantially central portion in the strut height direction, and is not necessarily set at the central portion (50% position) in the strut height direction. It is not what has been done. That is, the boundary between the upper half of the strut and the lower half of the strut may be set, for example, at a position of 40% to 60% from the upper end of the strut.

The pod-type propulsion device according to claim 5 is a strut having a wing-shaped cross section, a pod provided below the strut and having a propeller shaft to which power from driving means is transmitted. A pod propeller provided on the propeller shaft, wherein a front edge side half of the upper half of the strut is fixed to the hull, and the remaining portion of the strut; The pod is configured to be integrally rotatable with respect to a strut fixed to the hull.
According to such a pod type propulsion device, cavitation does not occur even if the steering angle is taken during high-speed navigation, so that noise and impact pressure generated when bubbles due to cavitation are crushed can be eliminated. Hull vibration can be reduced.
In addition, since the configuration of the pod type propulsion device can be substantially the same as that of the conventional pod type propulsion device, the manufacturing cost can be suppressed to about the same level as the conventional pod type propulsion device, and the manufacturing cost can be reduced. Can be kept at the same level as before.
The boundary between the upper half of the strut and the lower half of the strut may be set at the substantially central portion in the strut height direction, and is not necessarily set at the central portion (50% position) in the strut height direction. It is not what has been done. That is, the boundary between the upper half of the strut and the lower half of the strut may be set, for example, at a position of 40% to 60% from the upper end of the strut.

The pod-type propulsion device according to claim 6 includes a strut that is provided on the hull so as to be rotatable about a vertical axis, and a propeller shaft that is provided below the strut and to which power from the driving means is transmitted. A pod-type propulsion device including a pod and a pod propeller provided on the propeller shaft, wherein the pod is provided to be rotatable with respect to the strut.
According to such a pod type propulsion device, during high-speed navigation, the strut is fixed with respect to the hull, and only the pod is rotated to keep the needle or change the needle, thereby generating cavitation in the strut. It can be eliminated, and the noise and impact pressure generated when the bubbles due to cavitation are crushed can be eliminated.

The pod type propulsion device according to claim 7 is characterized in that a fin is provided below the pod, and the fin is provided so as to be rotatable with respect to each of the strut and the pod. To do.
According to such a pod type propulsion device, the fins can be steered independently of each other regardless of the pod or strut rudder angle. By keeping only the rudder angle of the fin that requires a small driving force while keeping the rudder angle fixed, the course of the ship can be maintained (can be maintained), and the power required for maintaining the needle can be reduced. .
Further, during mid- and low-speed navigation, setting the pod and the fin to have the same rudder angle allows the fin to serve as a rudder, so that the turning performance of the ship can be improved.

A ship according to an eighth aspect includes the pod-type propulsion device according to any one of the first to seventh aspects.
According to such a ship, since the occurrence of cavitation in the struts is eliminated, noise and impact pressure generated when bubbles due to cavitation are crushed can be eliminated, and noise and hull vibration can be reduced.

The ship according to claim 9 includes the pod-type propulsion device according to any one of claims 1 to 7 provided at a rear side of the main propeller, and a forward rotation direction of the pod propeller, The main propeller is set so that the forward rotation direction is opposite to each other.
According to such a ship, the main propeller and the pod propeller function as a so-called counter-rotating propeller, and the propulsion efficiency of the ship is improved.

The marine vessel operating method according to claim 10 is a pod having a strut provided on a hull so as to be able to turn around a vertical axis, and a propeller shaft provided below the strut and to which power from driving means is transmitted. And a pod propeller provided on the propeller shaft, and a method of operating a ship having a pod-type propulsion device, wherein the needle-holding or changing of the needle during high-speed navigation takes the rudder angle of the pod. It is performed.
According to such a ship operation method, during high-speed navigation, the pod steer angle is taken to hold or change the needle, and the strut steer angle is not taken (the strut steer angle is maintained at 0 degrees). Therefore, even during high-speed navigation, cavitation does not occur in the strut, so noise and impact pressure generated when bubbles are crushed by cavitation can be eliminated, and noise and hull vibration can be reduced. Can be reduced.
In addition, by taking the rudder angle of the strut together with the pod during medium / low speed navigation or when leaving or berthing, the ship's turning performance is improved and the ship's lateral movement is performed smoothly.

A marine vessel operating method according to claim 11 is a pod having a strut provided in a hull so as to be able to turn around a vertical axis, and a propeller shaft provided below the strut and to which power from driving means is transmitted. And a pod propeller provided on the propeller shaft, and a fin provided below the pod and rotatable relative to each of the strut and the pod. In the above-described operation method, it is characterized in that the holding or changing of the needle during high-speed navigation is performed by taking the rudder angle of the fin.
According to such a ship operation method, during high-speed navigation, the needle is held or changed by taking the rudder angle of the fin and the strut rudder angle is not taken (the strut rudder angle is maintained at 0 degrees). Therefore, even during high-speed navigation, cavitation does not occur in the strut, so noise and impact pressure generated when bubbles are crushed by cavitation can be eliminated, and noise and hull vibration can be reduced. Can be reduced.
Also, by keeping the rudder angle of the pod that requires a large driving force while keeping only the rudder angle of the fin that requires a small driving force, the ship's course can be maintained (can be held). The power required for this can be reduced.
Furthermore, by taking the rudder angle of the strut together with the pod at the time of middle / low speed navigation or at the time of leaving or berthing, the turning performance of the ship is improved and the lateral movement of the ship is performed smoothly.

  According to the present invention, cavitation is not generated in the strut even during high-speed navigation, so that noise and impact pressure generated when bubbles are collapsed due to cavitation can be eliminated, and noise and hull vibration can be reduced. .

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram showing a first embodiment of a pod-type propulsion device according to the present invention, in which (a) is a left side view and (b) is a cross-sectional view taken along the line II of FIG.
The pod type propulsion device 10 in the present embodiment is configured with a strut 11, a pod 12, a fin (auxiliary wing) 13, and a pod propeller 14 as main elements.
In the figure, reference numeral 1 denotes a rear part (hull) of the ship, reference numeral 2 denotes a main propeller that generates a main propulsive force for running the ship, and the main propeller 2 is a drive engine (not shown) such as a diesel engine. In general, it is called “main engine”) and is rotated by receiving driving force.

The strut 11 is fixed to the ship bottom rear part 1 via a support column 3 extending vertically downward from the ship bottom rear part 1, and the cross section thereof is configured to have a streamline (aerofoil type).
The pod 12 is configured so that the appearance of the pod 12 is substantially cylindrical, and the propeller shaft 4, the stator 5, the rotor 6, the electric motor 7, and the like that rotate the pod propeller 14 forward or backward are included therein. The propeller drive mechanism (drive means) is accommodated.
The pod 12 is rotatably attached to the strut 11 via a rotation shaft (not shown), and the upper end of the rotation shaft is provided in the hull (or inside the strut 11). Connected to a drive mechanism (not shown), the pod 12 is rotated with respect to the rear bottom 1 and the strut 11.

The fins 13 are fixed to the struts 11 via struts (not shown), and like the struts 11, the cross section is configured to have a streamline (aerofoil type). That is, the struts 11 and the fins 13 are fixed to the ship bottom rear portion 1, and only the pod 12 is configured to be rotatable with respect to the ship bottom rear portion 1, the struts 11, and the fins 13.
The pod propeller 14 can be rotated forward or reverse by the propeller drive mechanism described above, and has a function of generating a propulsive force by being rotated.
In the pod type propulsion device 10 configured as described above, a propulsive force is generated by the rotation of the pod propeller 14 (and the main propeller 2), the ship is sailed, and the pod 12 is rotated with respect to the rear part 1 of the ship bottom. Thus, a steering function is obtained, and the course direction of the ship can be changed.

According to the pod type propulsion device 10 according to the present embodiment, only the pod 12 is configured to be rotatable with respect to the hull bottom portion 1, and the strut 11 is fixed to the hull bottom portion 1 and has a steering angle as in the conventional case. Since no cavitation occurs in the struts 11 even during high-speed navigation, noise and impact pressure generated when bubbles are collapsed due to cavitation can be eliminated, and noise and hull vibration can be reduced. .
Further, there is no need to change the course direction of the ship by rotating the strut 11 itself, and cavitation does not occur in the strut 11 even at high speed navigation, so the design strength of the strut 11 can be reduced, Manufacturing cost can be reduced.
Furthermore, by providing the fin 13 below the pod 12 (the side deeper than the strut 11), the fin 13 serves as a so-called center board (used for yachts and the like). Can be improved.

A second embodiment of the pod-type propulsion device according to the present invention will be described with reference to FIG.
2A and 2B are diagrams showing a pod-type propulsion device according to a second embodiment of the present invention, where FIG. 2A is a left side view, and FIG. 2B is a view of the pod-type propulsion device as viewed from below the hull.
The pod type propulsion device 20 in the present embodiment is different from that in the first embodiment described above in that the fins 23 are configured to be rotatable with respect to each of the strut 11 and the pod 12. Since other components are the same as those in the above-described embodiment, description of these components is omitted here.
In addition, the same code | symbol is attached | subjected to the member same as 1st Embodiment mentioned above.

  The fins 23 according to the present embodiment are attached to a rotation shaft (not shown) extending downward from the pod 12 or a rotation shaft (not shown) extending from the strut 11 through the pod 12 and extending downward. The strut 11 and the pod 12 are configured to be rotatable with respect to the strut 11 and the pod 12 by a turning drive mechanism (not shown) different from the turning drive mechanism of the pod 12 provided on the pod 12. That is, the steering angle is different from the steering angle of the pod 12.

According to the pod type propulsion device 20 according to the present embodiment, since the fin 23 is configured to be able to take the rudder angle independently independently of the rudder angle of the pod 12, for example, a large driving force is required during high-speed navigation. By keeping only the rudder angle of the fins 23 that requires a small driving force while keeping the rudder angle of the pod 12, the course of the ship can be maintained (keeping can be maintained), and the power required for keeping the needle is reduced. Can be made.
In addition, during mid / low speed navigation, setting the pod 12 and the fin 23 to have the same rudder angle allows the fin 23 to serve as a rudder, thereby improving the turning performance of the ship. it can.
Since other operational effects are the same as those of the first embodiment, description thereof is omitted here.

A third embodiment of a pod-type propulsion device according to the present invention will be described with reference to FIG.
FIG. 3 is a left side view showing a third embodiment of the pod-type propulsion device according to the present invention.
In the pod-type propulsion device 30 in the present embodiment, the lower strut 31 of the strut 11 described above, for example, the lower strut 31 (that is, lower than half in the vertical direction) is the upper strut 32, pod 12, and fin 23. It differs from the thing of 2nd Embodiment mentioned above by the point comprised so that rotation with respect to each of these is possible. Since other components are the same as those in the above-described embodiment, description of these components is omitted here.
In addition, the same code | symbol is attached | subjected to the member same as 2nd Embodiment mentioned above.

  The lower strut 31 according to the present embodiment is attached to a rotation shaft (not shown) extending downward from the upper strut 32 or a rotation shaft (not shown) extending downward from the hull bottom 1 through the upper strut 32. Each of the upper strut 32, the pod 12, and the fin 23 is rotated by a turning drive mechanism (not shown) different from the turning drive mechanism of the pod 12 and the turning drive mechanism of the fin 23 provided on the upper end side of the shaft. It is configured to be rotatable. That is, the steering angle is different from the steering angle of the pod 12 and the steering angle of the fins 23.

According to the pod-type propulsion device 30 according to the present embodiment, the lower strut 31 can be independently and independently taken regardless of the steering angle of the pod 12 and the fin 23. The rudder angle of the lower strut 31 having a large rudder surface can be taken, and the turning performance of the ship during high-speed navigation can be improved.
In addition, as described with reference to FIG. 8, the upper strut 32 where cavitation occurs particularly strongly is fixed to the bottom 1 of the hull, and cavitation does not occur in the upper strut 32 even during high-speed navigation. It is possible to eliminate noise and impact pressure that are generated when bubbles due to crushing, and to reduce noise and hull vibration.
Further, when the vehicle is traveling at a medium or low speed, by setting the lower strut 31, the pod 12, and the fin 23 to have the same rudder angle, the lower strut 31 and the fin 23 serve as a rudder. It is possible to improve the turning performance of the ship, and to make the lower strut 31 substantially orthogonal to the bow tail line of the hull when leaving and berthing (especially when moving the ship substantially sideways). By taking the rudder angle, the resistance in lateral movement can be reduced, so that the ship can be moved laterally quickly, and the time required for berthing and berthing can be shortened.
Since other operational effects are the same as those of the second embodiment, description thereof is omitted here.

A fourth embodiment of the pod-type propulsion device according to the present invention will be described with reference to FIG.
4A and 4B are views showing a fourth embodiment of the pod-type propulsion device according to the present invention, in which FIG. 4A is a left side view, and FIG.
In the pod-type propulsion device 40 in the present embodiment, for example, the rear half (that is, the rear side of the half in the horizontal direction) of the upper strut 32 described above is configured as a flap 33, and the flap 33 is configured as an upper strut. 32 differs from that of the third embodiment described above in that it is configured to be rotatable with respect to 32. Since other components are the same as those in the above-described embodiment, description of these components is omitted here.
In addition, the same code | symbol is attached | subjected to the member same as 1st Embodiment mentioned above.

  The flap 33 according to this embodiment is attached to a hinge shaft (not shown) provided on the upper strut 32, and is rotatable with respect to the upper strut 32 by a drive mechanism (not shown) that drives the hinge shaft. It is configured.

According to the pod type propulsion device 40 according to the present embodiment, since the flap 33 can be used as a rudder, the turning performance of the ship during high-speed navigation can be improved.
The other operational effects are the same as those of the third embodiment, and the description thereof is omitted here.

A fifth embodiment of a pod-type propulsion device according to the present invention will be described with reference to FIG.
5A and 5B are views showing a fifth embodiment of the pod-type propulsion device according to the present invention, in which FIG. 5A is a left side view, and FIG. 5B is a perspective view of the pod-type propulsion device as viewed from above the hull. .
The pod type propulsion device 50 according to the present embodiment is configured such that the flap 33, the lower strut 31, the pod 12, and the fins 23 described above are integrally formed and rotatable with respect to the upper strut 32. This is different from that of the fourth embodiment described above. Since other components are the same as those in the above-described embodiment, description of these components is omitted here.
In addition, the same code | symbol is attached | subjected to the member same as 1st Embodiment mentioned above.

The flap 33, the lower strut 31, the pod 12, and the fin 23 according to the present embodiment are integrally configured, and are rotatably attached to the upper strut 32 via a rotation shaft (not shown). The upper end side of the pivot shaft is connected to a turning drive mechanism (not shown) provided on the hull side, and the flap 33, the lower strut 31, the pod 12, and the fins 23 are attached to the bottom rear portion 1 and the upper strut 32. On the other hand, it can be rotated integrally.
That is, the pod-type propulsion device 50 in the present embodiment is such that the strut portion that causes severe cavitation cannot take the rudder angle, in particular, when the rudder angle of the pod-type propulsion device is taken during high-speed navigation. The portion where cavitation occurs is fixed to the hull bottom 1.

According to the pod-type propulsion device 50 according to the present embodiment, cavitation does not occur even if the rudder angle is taken during high-speed navigation (or very little cavitation occurs). The generated noise and impact pressure can be eliminated (or noise and impact pressure can be made extremely small), and noise and hull vibration can be reduced.
Further, since the configuration of the pod type propulsion device 50 can be made substantially the same as that of the conventional pod type propulsion device, the manufacturing cost can be suppressed to substantially the same level as that of the conventional pod type propulsion device. Costs can be kept at the same level as before.
The other operational effects are the same as those of the fourth embodiment, and the description thereof is omitted here.

In the above-described embodiment, the propeller driving mechanism (driving means) such as the electric motor 7 that outputs the driving force of the pod propeller 14 of the pod type propulsion device has been installed in the pod 12. However, the present invention is not limited to this, and can also be applied to a structure in which a propeller drive mechanism (drive means) such as the electric motor 7 is installed on the hull side.
In the above-described embodiment, the pod 12 provided with the pod propeller 12 in the front portion (that is, the side close to the main propeller 2) has been described, but the present invention is not limited to this. As shown in FIG. 6, the present invention can also be applied to a pod type propulsion device having a pod propeller 14 at the rear portion of the pod 12.
Furthermore, the pod type propulsion device according to the present invention is not only applied to a ship having the main propeller 2, but can also be applied to a ship not having the main propeller 2, as shown in FIG.
Furthermore, two or more pod type propulsion devices according to the present invention can be provided for one ship, and can also be applied to a ship having a rudder at the rear part of the ship bottom.
Note that the boundary between the upper half of the strut and the lower half of the strut in the above-described embodiment may be set at a substantially central portion in the strut height direction, and the central portion (50% of the strut height direction). (Position) is not necessarily set. That is, the boundary between the upper half of the strut and the lower half of the strut may be set, for example, at a position of 40% to 60% from the upper end of the strut.

It is a figure which shows 1st Embodiment of the pod type propulsion device by this invention, Comprising: (a) is a left view, (b) is II sectional view taken on the line of (a). It is a figure which shows 2nd Embodiment of the pod type propulsion device by this invention, Comprising: (a) is a left view, (b) is the figure which looked at the pod type propulsion device from the downward direction of the hull. It is a left view which shows 3rd Embodiment of the pod type propulsion device by this invention. It is a figure which shows 4th Embodiment of the pod type propulsion device by this invention, Comprising: (a) is a left view, (b) is IV-IV arrow sectional drawing of (a). It is a figure which shows 5th Embodiment of the pod type propulsion device by this invention, Comprising: (a) is a left view, (b) is a VV arrow sectional drawing of (a). It is a left side view of the rear part of the ship bottom which shows an example of the ship provided with the pod type propulsion device in addition to the conventional main propeller. It is a left side view of the ship bottom rear part which shows the other example of the ship provided with the pod type propulsion device in addition to the conventional main propeller. It is a schematic perspective view for demonstrating the cavitation which generate | occur | produces in the strut of a pod type propulsion device.

Explanation of symbols

1 Rear hull (hull)
2 main propeller 4 propeller shaft 10 pod type propulsion device 11 strut 12 pod 13 fin 14 pod propeller 20 pod type propulsion device 23 fin 30 pod type propulsion device 31 lower strut 32 upper strut 33 flap 40 pod type propulsion device 50 pod type propulsion device 51 Strut

Claims (11)

A strut having an airfoil cross-section, a pod having a propeller shaft that is provided below the strut and to which power from driving means is transmitted, and a pod propeller provided on the propeller shaft. A pod type propulsion device comprising:
A pod-type propulsion device characterized in that the strut is fixed to a hull and the pod is provided to be rotatable with respect to the strut.   The pod type propulsion device according to claim 1, wherein a fin is provided below the pod, and the fin is fixed to the strut. A strut having an airfoil cross-section, a pod having a propeller shaft that is provided below the strut and to which power from driving means is transmitted, and a pod propeller provided on the propeller shaft. A pod type propulsion device comprising:
The upper half of the strut is fixed to the hull, and the lower half of the strut and the pod are provided so as to be rotatable with respect to the upper half of the strut, respectively. Propeller. A strut having an airfoil shape in cross section, a pod having a propeller shaft that is provided below the strut and to which power from driving means is transmitted, and a pod propeller provided on the propeller shaft. A pod type propulsion device comprising:
The front half of the upper half of the strut is fixed to the hull, and the rear half of the upper half of the strut, the lower half of the strut, and the pod are each of the upper half of the strut. A pod-type propulsion device that is provided so as to be rotatable with respect to the front edge half. A strut having an airfoil cross-section, a pod having a propeller shaft that is provided below the strut and to which power from driving means is transmitted, and a pod propeller provided on the propeller shaft. A pod type propulsion device comprising:
The front half of the upper half of the strut is fixed with respect to the hull, and the remaining portion of the strut and the pod can be rotated integrally with the strut fixed with respect to the hull. A pod-type propulsion device characterized in that it is configured. A strut that is provided on the hull so as to be rotatable about a vertical axis, a pod that is provided below the strut and has a propeller shaft that transmits power from driving means therein, and a pod propeller provided on the propeller shaft A pod-type propulsion device comprising:
A pod-type propulsion device, wherein the pod is provided so as to be rotatable with respect to the strut.   A fin is provided below the pod, and the fin is rotatably provided with respect to each of the strut and the pod. The pod type propulsion device according to item.   A ship comprising the pod-type propulsion device according to any one of claims 1 to 7.   The pod-type propulsion device according to any one of claims 1 to 7 is provided behind the main propeller, and the forward rotation direction of the pod propeller and the forward rotation direction of the main propeller are A ship characterized by being set in opposite directions. A strut provided on the hull so as to be pivotable about a vertical axis; a pod provided below the strut and having a propeller shaft to which power from driving means is transmitted; and a pod propeller provided on the propeller shaft. A method of operating a ship equipped with a pod-type propulsion device comprising:
A method of operating a pod-type propulsion device, characterized in that the holding or changing of the needle during high-speed navigation is performed by taking the rudder angle of the pod. A strut provided on the hull so as to be pivotable about a vertical axis; a pod provided below the strut and having a propeller shaft to which power from driving means is transmitted; and a pod propeller provided on the propeller shaft. A method of operating a ship provided with a pod-type propulsion device provided with a fin below the pod and rotatably provided to each of the strut and the pod,
A method of operating a pod-type propulsion device, wherein the holding or changing of the needle during high-speed navigation is performed by taking the rudder angle of the fin.

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