JP2018027765A - Vessel propulsion system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vessel propulsion system capable of: improving maneuverability of a vessel while maintaining energy saving performance; and securing redundancy.SOLUTION: A vessel propulsion system comprises: a uniaxial variable pitch propeller 3, as a main propulsion device, with an adjustable blade angle; and lifting type revolving propellers 4, as sub-propulsion devices on each side of a vessel body 2, which have propellers 4b rotating around rotation shafts along a horizontal direction with the rotation shafts configured to be revolvable in the horizontal direction and can be lifted so as to be stored inside the vessel body 2.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a ship propulsion system.

  Conventionally, there has been known a ship propulsion device equipped with a variable pitch propeller capable of adjusting the wing angle of the propeller according to the load condition according to the load condition, speed, sea condition, etc., and improving the propulsion efficiency. (For example, see Patent Document 1 below).

JP 2014-198515 A

  In a propulsion device using such a propeller, it is generally difficult to achieve both propulsion efficiency and energy saving and ship maneuverability and redundancy. In the case of the above-described variable pitch propeller, a vessel equipped with only one axis has excellent propulsion efficiency during straight-ahead navigation, but in situations where fine maneuvering is required, such as when entering or leaving a port, the hull turns slightly. It takes time to not work. This can be said to be a weak point that cannot be ignored for a ship such as a passenger ferry, where the route is relatively short and timeliness is important. In addition, the structure of the variable pitch propeller inevitably becomes complicated, but there is also a problem that there is no alternative means for moving the ship if a trouble such as a failure occurs in the variable pitch propeller equipped with only one shaft in the ship. .

  In order to compensate for these disadvantages, for example, a ship equipped with variable pitch propellers on the left and right sides of the hull has been devised. However, although one can exhibit sufficient performance in terms of maneuverability and redundancy, one variable pitch propeller Compared to the model promoted by, it is inferior in terms of energy saving.

  In view of such circumstances, the present invention intends to provide a marine vessel propulsion system capable of improving ship maneuverability and ensuring redundancy while maintaining energy saving.

  The present invention includes, as a main propulsion device, a uniaxial variable-pitch propeller configured so that the blade angle can be adjusted, and as a sub-propulsion device, a rotation shaft that is disposed along a horizontal direction and that can be swung along a horizontal plane. And a propulsion system for a ship provided with an up-and-down swivel type propeller configured to be retractable to the hull.

  The marine vessel propulsion system according to the present invention is preferably configured by arranging the swivel propellers one by one on the left and right sides of the hull as the auxiliary propulsion device.

  According to the marine vessel propulsion system of the present invention, it is possible to improve the marine vessel maneuverability while maintaining energy saving performance and to achieve an excellent effect of ensuring redundancy.

It is a perspective view which shows an example of the stern structure of the ship to which the propulsion system of the ship by implementation of this invention is applied. It is the schematic which shows the arrangement | positioning seen from the bottom face of the propulsion system of the ship by implementation of this invention.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  1 and 2 show an example of a form of a ship propulsion system according to an embodiment of the present invention. The ship 1 includes a uniaxial variable pitch propeller 3 disposed as a main propeller at the center of the stern of the hull 2, and left and right sides of the hull 2 (in the present embodiment, positions just beside the variable pitch propeller 3) as auxiliary propellers. It comprises a swivel propeller 4 arranged in a single unit.

  The variable pitch propeller 3 is configured to be able to change the blade angle of each blade, and includes a rudder 5 at the rear. The blade angle changing operation is performed by a known mechanism in which each blade is rotated about the radial direction of the variable pitch propeller 3 as a central axis by a hydraulic drive device (not shown). The installation height of the variable pitch propeller 3 is above the baseline of the hull 2.

  The swivel propeller 4 is a propulsion device of a type also referred to as an azimuth propulsion device or an azimuth thruster. And a propeller 4b that rotates. The pod 4a has a built-in mechanism for rotating the shaft of the propeller 4b and other propellers 4b. The pod 4 a is supported at the tip of a support 4 c extending from the stern bottom of the hull 2, and the support 4 c turns 360 ° in the horizontal direction with respect to the hull 2. Thus, the swivel type propeller 4 is configured so that the propeller 4b can be swung along the horizontal plane together with the rotation axis. In addition, the swivel propeller 4 is configured as a liftable swivel propeller 4 that can be retracted into the hull 2 and housed in its entirety including the pod 4a, the propeller 4b, and the support 4c. The propeller 4 b of the swivel propeller 4 is supported at a height above the base line of the hull 2, as with the variable pitch propeller 3.

  In addition, various types can be adopted as the swing type propeller 4. For example, a type in which a device such as an electric motor (not shown) is built in the pod 4a as a power source for the propeller 4b, or power provided in the support 4c from a power source such as an engine (not shown) installed in the hull 2 is used. It is good also as a type which transmits motive power by a transmission mechanism. In the latter case, there are a type called L type, a type called Z type, and the like depending on the arrangement of the power source and the transmission shaft. Furthermore, although illustration is omitted, there are various types of swivel propellers 4 such as a model in which a total of two propellers are arranged before and after each pod and a model in which a cylindrical member for rectification is arranged around the propellers. Are known. In any case, as long as the swivel propeller 4 is liftable, various types can be selected as appropriate in accordance with the compartment configuration in the hull 2 and other circumstances.

  In the present embodiment, the swivel propeller 4 is arranged on the right and left sides of the central variable pitch propeller 3 one by one, but the installation position of the swivel propeller 4 is not limited to this, and the swivel propeller is not limited thereto. 4 may be disposed at any position as long as it is a position where the ship can be maneuvered without delay. However, if the position of the variable pitch propeller 3 provided at the center of the stern of the hull 2 is right and left just like the installation position in the present embodiment, the bottom of the ship with respect to the base line is sufficiently high, and the swivel propeller 4 is used as a base. It can be conveniently placed above the line, which is convenient. Further, when the swivel propeller 4 is used as a thruster, the propeller 4b is operated in a direction perpendicular to the hull 2. At this time, the rudder 5 may obstruct the flow by the propeller 4b. There is also an advantage of not.

  Thus, the marine vessel 1 of the present embodiment includes a uniaxial variable pitch propeller 3 as a main propulsion unit and a propulsion system including a rudder 5 behind the uniaxial variable pitch propeller 3. Compared with ships and the like, high propulsion efficiency is realized, and energy saving performance that is an advantage of the variable pitch propeller 3 can be sufficiently exhibited.

  Further, since a lifting type is adopted as the swivel propeller 4, if the swivel propeller 4 is pulled into the hull 2 during normal navigation except when entering or leaving the port, the swivel propeller 4 can be separated. Therefore, the energy saving performance can be further improved.

  On the other hand, at the time of entering / leaving, etc., by using the left and right turning type propellers 4, the hull 2 can be turned by high maneuverability. Alternatively, at this time, the variable pitch propeller 3 and the swivel propeller 4 may be used in combination as necessary.

  Further, even when trouble such as a failure occurs in the variable pitch propeller 3 as the main propulsion device, the navigation can be continued by driving the turning propeller 4 as the auxiliary propulsion device.

  As described above, in the present embodiment, the main propulsion device includes the uniaxial variable pitch propeller 3 configured so that the blade angle can be adjusted, and is disposed as a sub-propulsion device along the horizontal direction and on the horizontal plane. A propeller 4b that rotates about a rotation axis that can be swung along the center and a liftable swivel propeller 4 that is configured to be retractable into the hull 2 are provided. To achieve energy saving performance. On the other hand, by using the left and right turning propellers 4, the hull 2 can be turned with high maneuverability. In addition, even when a trouble occurs in the variable pitch propeller 3 that is the main propulsion device, it is possible to navigate with the turning type propeller 4 that is the sub propulsion device. In addition, by pulling the swivel propeller 4 into the hull 2, the resistance of the swivel propeller 4 can be reduced, and the energy saving performance can be further improved.

  In this embodiment, as the auxiliary propulsion device (swivel propeller) 4, the swivel propellers 4 are arranged one by one on the left and right sides of the hull 2. Can be placed at a height above the line without difficulty.

  Therefore, according to the present embodiment, the ship maneuverability can be improved while maintaining energy saving, and the redundancy can be secured.

  The marine vessel propulsion system of the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention.

1 Vessel 2 Hull 3 Variable Pitch Propeller (Main Propeller)
4 Revolving propeller (sub propeller)
4b propeller

Claims (2)

  As a main propulsion device, a uniaxial variable pitch propeller configured so that the blade angle can be adjusted is provided, and as a sub propulsion device, a propeller that rotates around a rotating shaft that is arranged along a horizontal direction and that can turn along a horizontal plane. And a propulsion system for a ship provided with an up-and-down swivel propeller configured to be retractable as a whole.   The marine vessel propulsion system according to claim 1, wherein the swivel propellers are arranged one by one on the left and right sides of the hull as the auxiliary propulsion device.

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