JP4406690B2 - Pod propeller ship with stern water guide wing - Google Patents

Description

  The present invention relates to a ship equipped with a pod propeller at the stern, and more particularly to a pod propeller ship with a stern water flow guide wing capable of guiding a relative water flow to a region between the propeller at the front end of the pod and the outer surface of the stern bottom.

Conventionally, a ship having a propeller and a rudder at the stern rear end has been developed in which fins for reducing hull resistance are provided on both sides of the stern hull.
By the way, in a ship equipped with a pod propeller at the stern, especially when it has a propeller at the front end of the pod, a stagnation of the relative water flow occurs between the upper half of the propeller and the outer surface of the stern bottom at the time of navigation. However, the development of the countermeasure has not been performed yet.
JP-A-6-298158 JP-A-8-175478

  The present invention can control the water flow guide wings on both sides of the hull ahead of the propeller according to the situation of the pod propeller in order to equalize the relative water flow flowing into the propeller at the pod front end in the pod propeller at the stern. It is an object of the present invention to provide a pod propeller ship with stern water flow guide wings.

In order to solve the above-mentioned problems, the pod propeller ship with stern water guide wing of the present invention is provided with a propeller that is driven to rotate by a drive mechanism in the pod at the front end of the pod along the center line of the hull under the bottom of the stern. comprising a loaded pod propellers, in order to guide the relative water flow during cruising to the area between the halves of the same propeller above the stern the vessel bottom outer plate surface on said propeller, forward of the propeller On both sides of the hull, there are water flow guide vanes attached to the rotation control shafts that project downward from the inside of the ship, and the distance between the water flow guide vanes on both sides of the hull is closer to the bow side than the stern side. The water flow guide vanes are arranged so as to be wide .

  Further, in the pod propeller ship with stern water flow guide wing of the present invention, the pod propeller is provided so that it can be raised and lowered with respect to the hull, and the water flow guide wing is also provided so that it can be raised and lowered with respect to the hull, so that the pod propeller can be raised and lowered. Correspondingly, a control system for raising and lowering the water flow guide vanes is provided.

  Further, the pod propeller ship with stern water flow guide wing of the present invention is provided with a steering mechanism for rotating the pod propeller about the vertical axis with respect to the hull, and the water flow guide corresponding to the rotation of the pod propeller. A control system for controlling the rotation of the wing via the rotation control shaft is provided.

  Further, the pod propeller ship with stern flow guide wing of the present invention is provided with a propeller with stern capable of constituting a contra-rotating propeller facing the propeller in front of the propeller at the pod front end of the pod propeller. An inboard motor for rotationally driving the propeller with the stern is provided, and the power source of the inboard motor and the power source of the motor for rotationally driving the propeller in the pod propeller are configured in common. .

In the pod propeller ship with stern water guide wing of the present invention described above, the stern water guide wings provided on both sides of the hull in front of the propeller at the front end of the pod propeller at the stern during navigation are the water guide wings on both sides of the hull. Relative water flow along the hull is arranged so that the distance between the two is wider on the bow side than on the stern side, and is controlled to rotate through a rotation control shaft that projects downward from the ship to the outside of the ship. Is guided to the region between the upper half of the propeller and the stern bottom skin at the top of the propeller. Thereby, the stagnation of the relative water flow in the region is eliminated, and the introduction of the relative water flow into the propeller is appropriately performed, and thus the propeller efficiency is improved.

  In addition, the pod propeller is provided so as to be able to move up and down with respect to the hull, and the water flow guide wing is also provided so as to be able to move up and down with respect to the hull, and a control system for raising and lowering the water flow guide wing in response to the raising and lowering of the pod propeller. If it is provided, for example, the pod propeller is raised and lowered and the water flow guide vanes are raised and lowered appropriately based on the detection signal from the trim sensor. Relative water flow is sufficiently introduced into the region between the upper stern bottom skin and the propeller efficiency is improved by eliminating stagnation in the region.

  Further, a steering mechanism for rotating the pod propeller about the vertical axis with respect to the hull is provided, and the water flow guide blade is rotated via the rotation control shaft in response to the rotation of the pod propeller during steering. In the case where a control system for dynamic control is provided, the rotation of the water flow guide blade by the rotation control shaft is appropriately performed based on the pod rotation angle (steering angle). Relative water flow is sufficiently introduced into the region between the upper half of the propeller and the stern bottom shell plate surface above the propeller, and the propeller efficiency is improved by eliminating the stagnation in the region. .

  In addition, a propeller with a stern capable of forming a contra-rotating propeller is provided in front of the propeller at the front end of the pod propeller, and an inboard motor for rotationally driving the propeller with the stern is provided. If the power supply of the in-ship motor and the power supply of the pod motor in the pod propeller are configured in common, the advantage of the counter-rotating propeller can be obtained when the ship goes straight, Relative water flow is fully introduced into the area between the upper half and the stern bottom skin surface above it, and the elimination of stagnation in that area provides sufficient efficiency as a counter-rotating propeller In order to drive the propeller in the pod propeller and the inboard motor that rotationally drives the stern propeller By motor and power are commonly constructed, advantages control of both motors is to be easily performed by a simple control means can be obtained.

  In order to respond to changes in the hull trim, a pod propeller is installed so that it can be raised and lowered relative to the hull, and the water depth is maintained appropriately, and the pod propeller is rotated around the horizontal horizontal axis. So that the propeller axis of the pod propeller is kept horizontal.

  1 is a side view partially showing a cross-section of a main part of a pod propeller ship with a stern flow guide wing as an embodiment of the present invention, FIG. 2 is a view taken along arrow AA in FIG. 1, and FIG. FIG. 4 is a stern front view showing a modified example of the present invention corresponding to FIG. 2, and FIGS. 5 and 6 are respectively a water flow guide blade lifting control system and a water flow in the above embodiment. FIG. 7 is a block diagram showing a guide wing rotation control system, FIG. 7 is a stern side view showing a main part of a pod propeller ship with a stern water flow guide wing as another modified example of the present invention, and FIG. 8 is a stern shown in FIG. It is a block diagram which shows the power system of the pod propeller ship with a water flow guide wing.

  As shown in FIGS. 1 to 3, a strut 2 extending from the stern portion 1 to the bottom of the ship along the hull center line 1 </ b> A and a pod propeller 3 </ b> A attached to the lower end of the strut 2 are provided. The pod propeller 3A is provided with a propeller 4 at the front end, and the propeller 4 is driven to rotate by a motor 5 as a driving engine in the pod 3. The rotation of the propeller 4 may be driven by a drive mechanism such as a gear set in the pod that is operated by an inboard motor.

  An intermediate portion of the strut 2 is disposed so as to be able to be lifted and lowered to the opening of the ship bottom skin via a watertight means 21, and an upper end portion of the strut 2 is connected to a lifting portion 22 a of a hydraulic cylinder type lifting drive mechanism 22 via a flange 23. It is connected.

  Further, the upper part of the pod propeller 3A is connected to the lower end of the strut 2 in water via a hydraulic torque hinge mechanism 24, and the pod propeller 3A can be adjusted relative to the stern portion 1 in this way. Is provided.

  In the present embodiment, in the hydraulic torque hinge mechanism 24, the central shaft 24b projecting the fixed blade 24a is provided integrally with the strut 2, and the drum-shaped casing 24d projecting the movable blade 24c is: For example, when the hydraulic oil is supplied from the oil hole a and discharged from the other oil hole b, the pod 3 is rotated clockwise in FIG. become. The hydraulic oil is supplied and discharged by a hydraulic control system including a hydraulic pump (not shown).

  The strut 2 is inserted through the opening of the bottom plate of the ship so that it can also rotate through the watertight means 21, and the middle part of the strut 2 penetrates the fixed base 25a and the rotary base 25b of the turntable 25 on the ship. Extending upwards. An elevating drive mechanism 22 capable of elevating the flange 23 at the upper end of the strut is erected on the turntable 25b. Thus, when the turntable 25 rotates, the strut 2 rotates around the vertical axis together with the lifting drive mechanism 22, and the steering action is performed by the rotation of the pod propeller 3A. .

In the present embodiment, especially during navigation, the relative water flow can be guided to the area between the upper half of the propeller 4 at the front end of the pod propeller 3A and the stern stern bottom skin 1a. Water flow guide wings 7 are attached to the lower end portions of the rotation control shafts 6 that protrude through the hull outer plate in a watertight manner from the inside of the ship to the lower outside of the ship.
The intermediate portion of the rotation control shaft 6 extends upward through the fixed table 8a and the rotating table 8b of the turntable 8 in the ship, and is fixed to the rotating table 8b.

An elevating drive mechanism 10 that can elevate the flange 9 integral with the upper end of the rotation control shaft 6 is erected on the turntable 8b.
Thus, when the turntable 8 is rotated, the rotation control shaft 6 rotates together with the lifting drive mechanism 10 and the flange 9 so that the rotation control of the water flow guide blade 7 can be performed.

  Further, in this embodiment, as shown in FIG. 5, in response to detection signals from the trim sensor 11 and the draft sensor 12 provided on the hull, a torque hinge mechanism 24 as a pod propeller lifting device and a pod propeller lifting device are provided. Are equipped with a comprehensive control system 13 for controlling each of the hydraulic lifting drive mechanism 22 and the hydraulic lifting drive mechanism 10 as a water flow guide blade lifting device.

  Moreover, as shown in FIG. 6, the water flow guide blade rotation control which receives the pod rotation angle signal (steer angle signal) from the turn table 25 as the steering mechanism and controls the turn table 8 as the water flow guide blade rotation device. System 14 is equipped.

  In the pod propeller ship with stern water guide wings of the above-described embodiment, the stern water guide wings 7 provided on both sides of the hull in front of the propeller 4 at the front end of the pod propeller at the stern are sailed from the inside of the ship to the outside of the ship. The relative water flow along the hull is controlled between the upper half of the propeller 4 and the stern bottom skin plate 1a above the propeller 4 by being controlled to rotate through the rotation control shaft 6 protruding downward. Be guided to the area. As a result, the stagnation of the relative water flow in the region is eliminated, the introduction of the relative water flow into the propeller 4 is appropriately performed, and thus the propeller efficiency is improved.

  In addition, the pod propeller 3A is provided so as to be able to move up and down with respect to the hull, and the water flow guide wing 7 is also provided so as to be able to move up and down with respect to the hull so that the water flow guide can be adapted to the detection signals from the trim sensor 11 and the draft sensor 12. Since a water flow guide blade lifting device as a hydraulic lifting drive mechanism 10 for lifting and lowering the blade 7, a hydraulic lifting drive mechanism 22 as a pod propeller lifting device, and a hydraulic torque hinge mechanism 24 as a pod propeller lifting device are provided. The pod propeller 3A is lifted and lowered, and the control of the water flow guide wings 7 is appropriately controlled. As a result, the upper half of the propeller 4 and the stern bottom shell plate surface 1a above the propeller are connected. Relative water flow is sufficiently introduced to the area in between, and elimination of stagnation in the area leads to improved propeller efficiency.

  Further, a steering mechanism is provided as a turntable 25 for rotating the pod propeller 3A about the vertical axis with respect to the hull, and the water flow guide blade 7 is rotated in response to the rotation of the pod propeller 3A during the steering. Since the water flow guide vane rotation control system 14 that performs rotation control via the control shaft 6 is provided, the water flow guide vane 7 is appropriately rotated by the rotation control shaft 6 based on the pod rotation angle (steer angle). The relative water flow is sufficiently introduced into the region between the upper half portion of the propeller 4 and the stern bottom shell plate surface 1a above the propeller. Elimination improves propeller efficiency.

  Further, in order to appropriately cope with the change in the hull trim, as shown in FIG. 5, the pod propeller 3A is hydraulically connected via a comprehensive control system 13 that receives detection signals from the trim sensor 11 and the draft sensor 12. The pod propeller is controlled by a hydraulic torque hinge mechanism 24 that adjusts the height of the hull by the lift drive mechanism 22 to keep the water depth at an appropriate level and rotates the pod propeller 3A around the horizontal horizontal axis. It is controlled so that the 3A propeller axis is kept horizontal.

  FIG. 4 shows a modification of the above-described embodiment corresponding to FIG. 2, and the left and right rotation control shafts 6 that support the water flow guide wings 7 are provided in a C-shape when viewed from the rear according to the ship shape. However, in this case as well, the same operational effects as those of the above-described embodiments can be obtained.

  Further, FIG. 7 shows another modified example of the present invention corresponding to FIG. 1, and in this case as well, as in the embodiment of FIG. A strut 2 and a pod propeller 3A attached to the lower end of the strut 2 are provided. The pod propeller 3 </ b> A includes a propeller 4 at the front end, and the propeller 4 is driven to rotate by a motor 5 in the pod 3.

  In this modified example, a propeller 30 with a stern capable of forming a contra-rotating propeller is provided in front of the propeller 4 at the front end of the pod propeller 3A so as to be opposed to the propeller 4, and the propeller 30 with the stern is driven to rotate. An inboard motor 31 is provided.

  The power supply for the inboard motor 30 and the power supply for the pod motor 5 are configured in common. That is, as shown in FIG. 8, from a generator 33 driven by an inboard motor (gas turbine or diesel engine) 32, to a pod motor 5 and an inboard motor 31 via a switchboard 34a of a battery 34 and a motor control system 35. Is supplied.

  Further, in front of the propeller 4 with the pod and the propeller 30 with the stern, the water flow guide blades 36 are respectively suspended on both sides of the hull. It is performed by means similar to the control means for the water flow guide vanes 7 shown in FIG.

  In the above-described modification, the advantage of the counter-rotating propellers 4 and 30 can be obtained in a straight traveling state of the ship, and the upper half portion of the counter-rotating propellers 4 and 30 and the stern bottom shell plate surface above the upper half The introduction of the relative water flow into the region between the two is sufficiently performed by the action of the water flow guide blade 36, and the elimination of the stagnation in the same region brings about sufficient efficiency as a counter-rotating propeller, and the propeller with stern Advantages of controlling the motors 5 and 31 easily with simple control means, because the in-board motor 31 that rotates 30 and the power source of the pod motor 5 in the pod propeller 3A are configured in common. Is obtained.

  In the embodiment of the present invention, only one pod propeller is provided along the hull center line. However, even when a plurality of pod propellers are arranged in parallel below the stern bottom, the pod propeller with stern water guide vanes of the present invention is also provided. Ship configurations can be used.

It is a side view which shows the principal part of the pod propeller ship with a stern water flow guide wing as one Example of this invention partially in cross section. It is an AA arrow line view of FIG. It is a BB arrow line view of FIG. It is a stern front view which shows the modification of this invention corresponding to FIG. It is a block diagram of the control system with which the pod propeller ship with a stern water flow guide wing | blade of a present Example is equipped. It is a block diagram of the other control system with which the pod propeller ship with a stern water flow guide wing | blade of a present Example is equipped. It is a principal part side view which shows the pod propeller ship with a stern water flow guide wing as other modifications of this invention. It is a block diagram which shows the control system in the modification of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Stern part 1A Hull center line 1a Stern bottom part outer plate surface 2 Strut 3 Pod 3A Pod propeller 4 Propeller 5 Motor 6 Rotation control shaft 7 Water flow guide wing 8 Turntable 8a Fixed stand 8b Turntable 9 Flange
10 Hydraulic lifting drive mechanism for water flow guide vanes
11 Trim sensor
12 Draft sensor
13 Integrated control system
14 Water guide blade rotation control system
21 Watertight means
22 Hydraulic lifting drive mechanism for pod propeller
22a Lifting part
23 Flange
24 Hydraulic torque hinge mechanism
24a fixed wing
24b Center axis
24c movable wing
24d drum casing
25 Turntable
25a fixed base
25b Turntable
30 Propeller with stern
31 Inboard motor
32 prime mover
33 Generator
34 battery
34a Switchboard
35 Motor control system
36 Water guide vane a Oil hole

Claims (4)

A pod propeller mounted with a propeller that is driven to rotate by a drive mechanism in the pod at the front end of the pod along the center line of the hull under the bottom of the stern part, and the stern above the propeller and the upper half of the propeller in order to guide the relative water flow during cruising to the region between the ship bottom outer plate surface, the hull sides of the front than the propeller mounted on the rotating control shaft projecting from inboard respectively to outboard downwardly A stern water flow guide, wherein the water flow guide wings are arranged such that the distance between the water flow guide wings on both sides of the hull is wider on the bow side than on the stern side. Wing pod propeller ship.   The pod propeller is provided so that it can be raised and lowered with respect to the hull, and the water flow guide wing is also provided so that it can be raised and lowered with respect to the hull, and a control system for raising and lowering the water flow guide wing in response to the raising and lowering of the pod propeller is provided. The pod propeller ship with stern water guide vanes according to claim 1, wherein the pod propeller ship is provided.   A steering mechanism for rotating the pod propeller about the vertical axis with respect to the hull is provided, and the water flow guide wing is controlled to rotate through the rotation control shaft in response to the rotation of the pod propeller. The pod propeller ship with stern water flow guide wing according to claim 1 or 2, further comprising a control system.   A propeller with a stern capable of constituting a contra-rotating propeller is provided in front of the propeller at the pod front end of the pod propeller, and an inboard motor for rotating the propeller with the stern is provided. The stern according to any one of claims 1 to 3, wherein a power source of the inboard motor and a power source of a motor for rotationally driving the propeller in the pod propeller are configured in common. Pod propeller ship with water flow guide wings.

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