CN111717363B

CN111717363B - Ship bow rudder system of container ship

Info

Publication number: CN111717363B
Application number: CN202010626060.XA
Authority: CN
Inventors: 李博洋; 李雅静; 杨倩倩; 韩兆林; 崔莹; 张荣秀
Original assignee: Qingdao University of Science and Technology
Current assignee: Shenzhen Hongyue Information Technology Co ltd
Priority date: 2020-07-02
Filing date: 2020-07-02
Publication date: 2021-07-16
Anticipated expiration: 2040-07-02
Also published as: CN111717363A

Abstract

A ship bow rudder system of a container ship, the system mainly comprising: the device comprises a ship bow rudder, the rear end of a bulbous bow, a rotating shaft, a rudder stock, a shifting fork, an oil cylinder, a ram, a cylindrical pin, a working oil port A, a working oil port B and a ship bow rudder rear body. Under the trend of gradually enlarging the size of a ship, the invention mainly aims at the problems of poor turning performance and maneuverability and the like caused by longer ship length of a large-sized ship and provides the method that a ship bow rudder is arranged in front of the ship, as most of seawater near the bow flows in a laminar flow mode, the steering force of the ship bow rudder is concentrated, the generated ship turning moment is larger, and the turning performance of the ship bow rudder is better, the steering effect of the ship bow rudder is better.

Description

Ship bow rudder system of container ship

Technical Field

The invention belongs to the technical field of ships, and particularly relates to a bow rudder system of a container ship.

Background

With the increasing demand of people on the circulation speed of goods, the goods transportation carriers are continuously changed, and in the shipping industry, an important change of the goods transportation carriers is that a convenient and efficient container ship gradually replaces a traditional dry and miscellaneous cargo ship, and the goods transportation carriers gradually become the main force of marine transportation.

Moreover, as the main scale of the ship is larger, the economic benefit is more obvious, and therefore, since the 20 th century and the 90 th century, the container ship formally enters a large-scale era and gradually presents a brand new development trend along with the gradual maturity of key technologies such as high-strength hull materials, high-power marine engines and the like.

At present, the container ship in the international ship shipping market mainly shows the development trend of large-scale, economy and environmental protection. From the current ship type, the container ship with the length of more than 8000TEU generally exceeds 350m, and the length of 24000TEU is close to 400 m. The main dimension of the container ship is continuously increased, so that the difficulty of the container ship is increased when the container ship is in maneuvering navigation, the gyration performance and the maneuverability, namely the maneuverability, are deteriorated, and in order to solve the problem, the large container ship is provided with a side pushing device under the common condition. However, although the side pushing device of the ship increases the maneuverability of the ship to a certain extent, disadvantages are correspondingly brought, for example, the ship installation side pushing device is high in investment cost, and the side pushing device is arranged to be required to be provided with an opening on the ship body, so that the sailing resistance of the ship is increased to a certain extent, and moreover, the side pushing device of the ship consumes a large amount of electric power of the ship when working, so that more fuel consumption of the ship is inevitably caused, the economy of the ship is reduced, and the emission of the ship is increased. Therefore, in order to overcome the disadvantages of poor maneuverability due to the large size of the container ship and the installation of the side thrust device, it is important to develop a device capable of overcoming the disadvantages.

The bulbous bow is an effective measure for reducing the total resistance of the ship, and the rapidity of the ship can be correspondingly improved. During the navigation of the ship, the wave trough of the wave formed by the bulb bow and the wave crest of the head transverse wave of the main ship body are just at the same position, and favorable interference is formed near the bow of the ship, so that the wave height of the formed synthetic wave is correspondingly reduced, and the wave-making resistance of the ship body is reduced. On a large container ship with higher requirement on navigational speed, the bulb is long and narrow, the front section of the bulb is flat, and based on the characteristic of the bulb of the container ship, the front end part of the bulb can be changed into a ship rudder, namely, a rudder blade is added to the bow part, so that the ship has the function of changing the course by rotating the rudder blade of the bow under the condition of not influencing the original function of the bulb, and the device has great practical application significance under the large trend of large-scale ships.

Disclosure of Invention

The present invention has been made in view of the above-mentioned problems, and provides a rudder system for a container ship, the system comprising: the device comprises a ship bow rudder, the rear end of a bulbous bow, a rotating shaft, a rudder stock, a shifting fork, an oil cylinder, a ram, a cylindrical pin, a working oil port A, a working oil port B and a ship bow rudder rear body.

The ship bow rudder and the rear end of the bulb bow jointly form the bulb bow of the ship, the ship bow rudder and the rear end of the bulb bow are connected through a rotating shaft, and the ship bow rudder and the bulb bow can rotate relative to each other. The rear end of the bulbous bow is rigidly connected with the ship body, and the curvature of the joint is continuous. Meanwhile, the connection between the rear end of the bulbous bow and the bow rudder also keeps curvature continuity.

Compared with the rear end of the bulbous bow, the bow rudder is flat, and the shape of the rear body of the bow rudder is a rotating surface, so that even if the bow rudder rotates relative to the bulbous bow, the curvature of the connecting part of the rear end of the bulbous bow and the rear body of the bow rudder in the bow rudder can be kept continuous, the sealing performance of the connecting part is good, and seawater can not enter the interior of the bulbous bow when the bow rudder rotates. The steering effect of the ship bow rudder is good, so that the steering angle of the ship bow rudder can be set to be not more than 25 degrees.

The rudder stock is positioned in the bulb bow, one end of the rudder stock is rigidly fixed at the rear body of the bulb bow, and the other end of the rudder stock is rigidly connected with the shifting fork.

The shifting fork is fixed on the ram through a cylindrical pin, two ends of the ram are respectively sleeved with an oil cylinder, and the other side connected with the oil cylinder ram is respectively provided with a working oil port A and a working oil port B. The hydraulic oil can enter from the working oil port A and flow out from the working oil port B, or enter from the working oil port B and flow out from the working oil port A to control the ram to move along the oil cylinder, so that a cylindrical pin and a shifting fork fixed on the ram are driven to move, and the ship bow rudder is controlled to carry out left-turn rudder and right-turn rudder.

The invention has the beneficial effects that:

1. the laminar flow state of the seawater near the bow rudder is more obvious than that near the stern, so the hydrodynamic thrust generated by the unit rudder blade area of the bow rudder is larger, the ship turning effect is better, and the maneuverability of the ship can be greatly improved by installing the bow rudder.

2. The system can replace a side pushing device of a ship to a certain extent, not only can save the investment cost for installing the side pushing device, but also can avoid the large consumption of electric power for steering when the ship is in maneuvering navigation, and simultaneously can avoid the large increase of the friction resistance of the ship caused by the existence of holes on the surface of the ship body due to the installation and the side pushing of the ship, and reduce the energy consumption of the ship.

3. Because the system of the invention has the performance of steering at the ship head part under the condition of keeping the traditional bulb, compared with the traditional bulb, the length of the ship bow rudder and the bulb of the device of the invention in the ship length direction is longer, the molded line transition of the underwater ship body is smoother, the wave breaking resistance in the advancing process of the ship can be correspondingly reduced, the energy consumption of the ship is reduced, and the economy is improved.

4. Under the trend that the ship is gradually enlarged, the system can greatly improve the maneuverability of the ship on the premise of paying less cost, and the method is simple and easy to realize, so the method has a good application prospect.

Drawings

FIG. 1 is a system diagram of the present invention;

FIG. 2 is a front view of a stem rudder and a rear end of a bulb etc. in the present invention;

FIG. 3 is a side view of the stem rudder and aft end of the bulb, etc. of the present invention;

FIG. 4 is a schematic view of a stem rudder and a rear end of a bulbous bow, etc., in the present invention;

FIG. 5 is a three-dimensional model of a stem rudder, etc., in the present invention;

FIG. 6 is a schematic illustration of the system of the present invention installed on a vessel;

FIG. 7 is a schematic view of the apparatus of the present invention in a normal, fixed speed position of the vessel;

FIG. 8 is a schematic view of the apparatus of the present invention when the vessel is turning left;

fig. 9 is a schematic view of the arrangement of the present invention in a left turn of the vessel;

FIG. 10 is a schematic view of the apparatus of the present invention with the vessel rudder right;

fig. 11 is a schematic view of the state of the device of the invention when the ship is steered on the right;

1. a ship bow rudder; 2. the rear end of the bulbous bow; 3. a rotating shaft; 4. a tiller; 5. a shifting fork; 6. an oil cylinder; 7. a ram; 8. a cylindrical pin; 9. a working oil port A; 10. a working oil port B; 11. a bow rudder afterbody.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and examples.

A rudder system of a container ship, as shown in fig. 1 and 5, comprising: the device comprises a ship bow rudder (1), a bulbous bow rear end (2), a rotating shaft (3), a rudder stock (4), a shifting fork (5), an oil cylinder (6), a ram (7), a cylindrical pin (8), a working oil port A (9), a working oil port B (10) and a ship bow rudder rear body (11). Wherein, the rear end (2) of the bulbous bow is rigidly connected with the ship body, and the curvature of the connection part is continuous.

The ship bow rudder (1) and the bulb rear end (2) are connected through the rotating shaft (3) and can rotate relatively, as shown in figures 2, 3 and 4, meanwhile, the connection between the bulb rear end (2) and the bow rudder rear body (11) in the ship bow rudder (1) also keeps continuous curvature, compared with the bulb rear end (2), the shape of the ship bow rudder (1) is flat, the shape of the bow rudder rear body (11) is a rotating surface, as shown in figures 5 and 6, so even if the ship bow rudder (1) rotates relative to the bulb rear end (2), the curvature of the connection between the bulb rear end (2) and the bow rudder rear body (11), namely the curvature of the connection can also keep continuous, the sealing performance of the connection is good, and when the ship bow rudder (1) rotates, seawater cannot enter the interior of the bulb. Because the rudder turning effect of the ship bow rudder (1) is good, the rudder angle of the ship bow rudder (1) is within 25 degrees, and the rudder angle can be matched with the stern rudder to meet the rudder turning requirement of the ship during maneuvering navigation, so that the rudder angle of the ship bow rudder (1) can be set to be not more than 25 degrees.

The rudder stock (4) is positioned in the bulb, one end of the rudder stock (4) is rigidly fixed at the rear body (11) of the bulb rudder, and the other end is rigidly connected with the shifting fork (5), as shown in figure 5.

As shown in figure 1, the shifting fork (5) is fixed on the ram (7) through a cylindrical pin (8), two ends of the ram (7) are respectively sleeved with an oil cylinder (6), and the other side where the oil cylinder (6) is connected with the ram (7) is respectively provided with a working oil port A (9) and a working oil port B (10). The hydraulic oil can enter from the working oil port A (9) and flow out from the working oil port B (10), or enter from the working oil port B (10) and flow out from the working oil port A (9) to control the ram (7) to move along the oil cylinder (6), so that a cylindrical pin (8) and a shifting fork (5) fixed on the ram (7) are driven to move, and the rudder angle of the ship bow rudder (1) is controlled.

When the ship sails at a constant speed in the sea, the state of the device is shown in figure 7, the rudder angle of the ship bow rudder (1) in constant-speed sailing is 0 degree, and the bulbous bow formed by the ship bow rudder (1) and the rear end (2) of the bulbous bow plays a role in reducing the total resistance of the common bulbous bow and does not have the effect of the rudder any more.

When the ship is in power-driven navigation, the ship speed is low. At the moment, if the ship needs to steer left, hydraulic oil can be controlled by the control system to enter from the working oil port A (9) and flow out from the working oil port B (10) to push the striker (7) to move rightwards along the oil cylinder (6), so that the rudder stock (4) is driven to move through the cylindrical pin (8), and the ship bow rudder (1) also realizes rotation around the rotating shaft (3) as the rudder stock (4) and the ship bow rudder (1) are rigidly fixed, as shown in fig. 8 and 9.

When the ship needs to turn right, the control system can control hydraulic oil to flow in from the working oil port B (10) and enter from the working oil port A (9), so that the ram (7) is pushed to move leftwards along the oil cylinder (6), and then the right steering is realized, as shown in fig. 10 and 11.

It should be noted that the system of the invention is not only aimed at the rudder effect, but also the rear end (2) of the bulb bow in the system of the invention still has the function of reducing the wave making resistance originally, and after the bow rudder (1) is added, the molded line of the front end of the bow is smoother, and the resistance generated when the ship sails can be correspondingly reduced when the ship sails at the normal fixed speed.

The container ship is selected as the installation object of the system, because the container ship has higher requirement on the speed, the rear end (2) of the bulb bow is flatter and is easier to be matched with the ship bow rudder (1), but the system can be installed not only for the ship which is suitable for the molded lines of other bulb bow rear ends (2) but also for the container ship, so that the ship can obtain better maneuverability.

The foregoing is merely a preferred embodiment of the present invention and the specific embodiments described herein are merely illustrative of the invention and are not intended to be limiting. It should be noted that modifications and adaptations may occur to those skilled in the art without departing from the principles of the present invention and should be considered within the scope of the present invention.

Claims

1. The ship bow rudder system of the container ship is characterized in that: the device comprises a ship bow rudder (1), a bulb bow rear end (2), a rotating shaft (3), a rudder stock (4), a shifting fork (5), an oil cylinder (6), a ram (7), a cylindrical pin (8), a working oil port A (9), a working oil port B (10) and a ship bow rudder rear body (11);

the ship comprises a ship bow rudder (1) and a bulb rear end (2), wherein the ship bow rudder (1) and the bulb rear end (2) jointly form a bulb of the ship, the ship bow rudder (1) and the bulb rear end (2) are connected through a rotating shaft (3) and can rotate relatively, the bulb rear end (2) and a ship bow rudder rear body (11) in the ship bow rudder (1) are connected to keep curvature continuous, a rudder stock (4) is located inside the bulb, one end of the rudder stock (4) is rigidly fixed to the ship bow rudder rear body (11), the other end of the rudder stock is rigidly connected with a shifting fork (5), the shifting fork (5) is fixed to a striker (7) through a cylindrical pin (8), oil cylinders (6) are sleeved at two ends of the striker (7) respectively, and a working oil port A (9) and a working oil port B (10) are arranged on the other side where the oil cylinders (6) and the striker (7) are connected respectively.

2. The rudder system for a container ship according to claim 1, wherein: the shape of the bow rudder afterbody (11) is a surface of revolution.

3. The rudder system for a container ship according to claim 1, wherein: in the system, the rudder angle of the ship bow rudder (1) is set to be not more than 25 degrees.