Distorted assembled batten structure, boat and manufacturing method

Abstract

The present application relates to the technical field of ship, especially to a twisted combined deadwood structure, a ship and a manufacturing method, the twisted combined deadwood structure comprises a deadwood body, the deadwood body is located in front of a propeller, the deadwood body comprises a first flow guide part and a second flow guide part connected with each other, the first flow guide part is fixedly arranged at the lower end of the stern of the ship body, and the second flow guide part and the first flow guide part are both twisted; two flow guide fins, the two flow guide fins are fixedly arranged on the deadwood body, the two flow guide fins are symmetrical about the center longitudinal section of the ship body, and the longitudinal section of the flow guide fin is in the shape of an inverted airfoil section.The deadwood body in the present application can make the water flow produce a speed opposite to the rotation direction of the propeller, thereby improving the efficiency of the propeller; the flow guide fin in the present application can improve the wake at the propeller disc surface, which is conducive to the design of the propeller and improves the working efficiency of the propeller.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ships, in particular to a twisted combined deadwood structure, a ship and a manufacturing method. BACKGROUND

[0002] Ships play a very important role in the transportation industry. For the shaftless barge type, a deadwood is usually arranged below the stern of the ship, which is symmetrical left and right along the water flow direction, and the deadwood is used to maintain the stability of the heading. However, this deadwood structure can only maintain the stability of the heading. During the navigation of the ship, the upper water flow near the position of the stern propeller is blocked by the ship body, and the water flow speed will slow down, while the lower water flow not blocked by the ship body will maintain the original flow speed, resulting in inconsistent water flow speed at the propeller disc surface, low propeller rotation efficiency, poor rotation stability, and easy to produce cavitation.

[0003] Therefore, a twisted combined deadwood structure, a ship and a manufacturing method are needed to solve the above problems. SUMMARY

[0004] The present application aims to provide a twisted combined deadwood structure, a ship and a manufacturing method, which can improve the flow speed and direction of the water flow at the propeller disc surface, thereby improving the working efficiency and rotation stability of the propeller and reducing the possibility of cavitation.

[0005] To achieve this purpose, the present application adopts the following technical solutions:

[0006] The twisted combined deadwood structure comprises:

[0007] a deadwood body, the deadwood body is located in front of the propeller, the deadwood body comprises a first flow guide part and a second flow guide part connected to each other, the first flow guide part is fixedly arranged at the lower end of the stern of the ship body, the first flow guide part and the second flow guide part are twisted, the rotation direction of the first flow guide part is opposite to the rotation direction of the upper half of the propeller, and the rotation direction of the second flow guide part is opposite to the rotation direction of the lower half of the propeller;

[0008] two flow guide fins, the two flow guide fins are fixedly arranged on the deadwood body, the two flow guide fins are symmetrical about the center longitudinal section of the ship body, and the longitudinal section of the flow guide fin is in the shape of an inverted airfoil.

[0009] Further, the cross-sectional area of the deadwood body gradually decreases in the direction from the first flow guide part to the second flow guide part.

[0010] Further, the end face of the deadwood body towards the ship body is conformal to the lower end face of the stern of the ship body.

[0011] Further, an end surface of the deadwood body away from the ship body is parallel to a horizontal plane.

[0012] Further, a center horizontal line of the propeller is located on a connecting surface of the first flow guide part and the second flow guide part.

[0013] Further, the first flow guide part and the second flow guide part are integrated structures.

[0014] Further, a lower end surface of the flow guide fin is arc-shaped.

[0015] Further, an included angle between the flow guide fin and a horizontal plane is 3°-12°.

[0016] A ship, comprising a ship body and a twisted combined deadwood structure as described above, the twisted combined deadwood structure being fixedly arranged on a lower end surface of a stern part of the ship body and located in a middle part of the ship body.

[0017] A manufacturing method for designing a twisted combined deadwood structure as described above, comprising the following steps:

[0018] S1, performing a CFD simulation experiment on a ship to obtain a flow line of a propeller center line;

[0019] S2, determining a position of the deadwood body according to the flow line, i.e., an intersection position of the first flow guide part and the second flow guide part;

[0020] S3, manufacturing the deadwood body according to the intersection position and in a structure shape of being wide at an upper part and narrow at a lower part along a height direction of the deadwood body;

[0021] S4, determining an included angle between a flow guide fin and a horizontal plane according to a size of the propeller and the CFD simulation experiment;

[0022] S5, fixing the flow guide fin on the deadwood body.

[0023] The present application has the following beneficial effects:

[0024] The twist combined barge structure provided by the application is characterized in that the barge body is located in front of the propeller, the barge body comprises a first flow guide part and a second flow guide part connected with each other, the first flow guide part is fixedly arranged at the lower end of the stern of the ship body, the first flow guide part and the second flow guide part are both twist-shaped, the rotation direction of the first flow guide part is opposite to the rotation direction of the upper half of the propeller, and the rotation direction of the second flow guide part is opposite to the rotation direction of the lower half of the propeller; the flow guide fins are fixedly arranged at the two sides of the barge body, and the longitudinal section of the flow guide fins is in the shape of an inverted airfoil section. By designing the first flow guide part and the second flow guide part to have different rotation directions, the direction of the water flow can be changed, so that the direction of the water flow is opposite to the rotation direction of the propeller, the thrust is increased during the rotation of the propeller, and the efficiency of the propeller is improved. In addition, by arranging the flow guide fins, part of the water flow with a constant lower layer flow rate is guided into the upper layer water flow with a slow flow rate hindered by the ship body, the flow rate difference between the upper layer water flow and the lower layer water flow is reduced, the propeller is less affected by the uneven water flow rate, the possibility of cavitation is reduced, the stability of the rotation of the propeller is ensured, and the rotation efficiency of the propeller is improved.

[0025] The ship provided by the application comprises a ship body and the twist combined barge structure as described above, the twist combined barge structure is fixedly arranged on the lower end surface of the stern of the ship body and located in the middle of the ship body. By arranging the twist combined barge structure, the flow rate and flow direction of the water flow at the propeller disc surface can be improved, and the working efficiency and rotation stability of the propeller are improved.

[0026] The manufacturing method provided by the application is used for designing the twist combined barge structure as described above, the flow rate and flow direction of the water flow at the propeller disc surface can be improved, and the working efficiency and rotation stability of the propeller are improved. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a front view of the twist combined barge structure of the application;

[0028] Figure 2 is a side view of the twist combined barge structure of the application;

[0029] Figure 3 is a sectional view of the barge body in the twist combined barge structure of the application;

[0030] Figure 4 is a three-dimensional view of the barge body in the twist combined barge structure of the application.

[0031] IN THE DRAWINGS:

[0032] 1, ship body; 11, propeller; 2, barge body; 21, first flow guide part; 22, second flow guide part; 3, flow guide fin. DETAILED DESCRIPTION

[0033] The technical solutions of the present application will be further described below in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application. In addition, it should be noted that only the parts related to the present application are shown in the drawings for the convenience of description, but not all.

[0034] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood broadly, for example, it can be fixed connection, or detachable connection; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium, or internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0035] In the present application, unless otherwise explicitly specified and limited, "on" or "under" of the first feature to the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, "on", "above" and "above" of the first feature to the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. "Below", "below" and "below" of the first feature to the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0036] The ship plays a very important role in the transportation industry. Among them, for the shaftless barge type, a wooden prop is usually arranged below the stern of the ship, which is symmetrical left and right along the direction of water flow, and the wooden prop is used to maintain the stability of the heading. But this wooden prop structure can only play the role of maintaining the stability of the heading. In the process of ship navigation, because the upper water flow near the position of the stern propeller is blocked by the ship body, the water flow speed will slow down, while the lower water flow not blocked by the ship body will maintain the original flow speed, resulting in inconsistent water flow speed at the propeller disc surface, which makes the rotating working efficiency of the propeller lower and the rotating stability of the propeller poorer.

[0037] In order to solve the above problems, improve the flow speed and direction of the water flow at the propeller disc surface, and improve the working efficiency and rotating stability of the propeller, as shown in Figures 1-4 The present application provides a twisted combination wooden prop structure. The twisted combination wooden prop structure comprises a wooden prop body 2 and two guide fins 3.

[0038] The first flow guide part 21 and the second flow guide part 22 are designed to be different in rotation direction, so that the direction of the water flow is opposite to the rotation direction of the propeller 11, thereby increasing the thrust during rotation of the propeller 11, and improving the efficiency of the propeller 11.

[0039] The first flow guide part 21 and the second flow guide part 22 are designed to be different in rotation direction, so that the direction of the water flow is opposite to the rotation direction of the propeller 11, thereby increasing the thrust during rotation of the propeller 11, and improving the efficiency of the propeller 11.

[0040] Further, the cross-sectional area of the wood body 2 gradually decreases in the direction from the first flow guide part 21 to the second flow guide part 22. By designing the wood body 2 to be wide at the top and narrow at the bottom, the top end surface of the wood body 2 can be ensured to have sufficient area for stable connection with the ship body 1, thereby ensuring the stability of the fixed connection between the wood body 2 and the ship body 1. By designing the lower end to be narrow, the resistance of the ship during navigation can be reduced.

[0041] Further, the end surface of the wood body 2 facing the ship body 1 is conformal to the lower end surface of the stern of the ship body 1. By designing the upper end surface of the first flow guide part 21 to be conformal to the end surface of the ship body 1, the first flow guide part 21 can be effectively fitted with the ship body 1 during installation, and the first flow guide part 21 can be stably connected with the ship body 1 after welding and installation.

[0042] Further, the end surface of the wood body 2 away from the ship body 1 is parallel to the horizontal plane. Through the above arrangement, the resistance of the second flow guide part 22 in water can be reduced, and the resistance of the ship during navigation can be reduced.

[0043] Further, the center horizontal line of the propeller 11 is located on the connecting surface of the first flow guide part 21 and the second flow guide part 22. Since the rotation direction of the upper half of the propeller 11 is opposite to the rotation direction of the lower half of the propeller 11 during the rotation of the propeller 11, by locating the center horizontal line of the propeller 11 on the connecting surface of the first flow guide part 21 and the second flow guide part 22, the first flow guide part 21 corresponds to the upper half of the propeller 11, and the second flow guide part 22 corresponds to the lower half of the propeller 11. By changing the direction of part of the water flow by the first flow guide part 21, which is opposite to the direction of the upper half of the propeller 11, the thrust of the rotation of the propeller 11 is increased; similarly, by changing the direction of part of the water flow by the second flow guide part 22, which is opposite to the direction of the lower half of the propeller 11, the thrust of the rotation of the propeller 11 is increased. In the above manner, the reverse thrust of the rotation of the propeller 11 can be improved, thereby improving the speed of the ship.

[0044] Further, the first flow guide part 21 and the second flow guide part 22 are integrated. Through the above arrangement, it can be ensured that the deadwood body 2 has sufficient strength, and there is no risk of breaking during the navigation of the ship. Moreover, the separation of the first flow guide part 21 and the second flow guide part 22 avoids corrosion of the connecting part by seawater, reducing the difficulty of construction.

[0045] Further, the lower end surface of the flow guide fin 3 is arc-shaped. By designing the lower end surface of the flow guide fin 3 to be arc-shaped, it can be ensured that the water flow flows smoothly from below the flow guide fin 3, thereby avoiding a large resistance of the flow guide fin 3.

[0046] Further, the angle between the flow guide fin 3 and the horizontal plane is 3°-12°. Specifically, the corresponding angle degree can be determined according to the size of the propeller 11. By arranging the flow guide fin 3 at an angle with the horizontal plane, part of the lower water flow can be guided to the upper half of the propeller 11, improving the wake of the propeller 11. Not only is it beneficial to the design of the propeller 11, but also improves the rotation efficiency of the propeller 11. In the present embodiment, the flow guide fin 3 is arranged on the first flow guide part 21 and located at the connecting surface of the first flow guide part 21 and the second flow guide part 22.

[0047] The present embodiment also provides a ship, which comprises a ship body 1 and a twisted combined deadwood structure as above, the twisted combined deadwood structure being fixedly arranged on the lower end surface of the stern of the ship body 1 and located at the middle part of the ship body 1, thereby improving the flow velocity and direction of the water flow at the propeller disc and improving the working efficiency and rotation stability of the propeller 11.

[0048] The present embodiment also provides a manufacturing method for designing the twisted combined deadwood structure as above, comprising the following steps:

[0049] S1, a CFD simulation experiment is performed on the ship to obtain a flow line of a center line of the propeller 11;

[0050] S2, a position of the flow line at the dummy wood body 2, that is, an intersection position of the first flow guide part 21 and the second flow guide part 22 is determined;

[0051] S3, the dummy wood body 2 is manufactured according to the intersection position and in a structure shape of being wide at the top and narrow at the bottom along a height direction of the dummy wood body 2;

[0052] S4, an angle between the flow guide fin 3 and a horizontal plane is determined according to a size of the propeller 11 and the CFD simulation experiment;

[0053] S5, the flow guide fin 3 is fixedly arranged on the dummy wood body 2.

[0054] Obviously, the above embodiments of the present application are merely exemplary and are not intended to limit the embodiments of the present application. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, all the embodiments are not required to be exhausted. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A twisted combination baulk structure characterised in that, The invention relates to a twisted combined deadwood structure, comprising: a deadwood body (2) located in front of a propeller (11), the deadwood body (2) comprising a first flow guide part (21) and a second flow guide part (22) connected to each other, the first flow guide part (21) being fixedly arranged at the lower end of the stern of a hull (1), the second flow guide part (22) and the first flow guide part (21) both being twisted, the rotation direction of the first flow guide part (21) being opposite to the rotation direction of the upper half of the propeller (11), and the rotation direction of the second flow guide part (22) being opposite to the rotation direction of the lower half of the propeller (11); two flow guide fins (3) fixedly arranged on the deadwood body (2), the two flow guide fins (3) being symmetrical about the center longitudinal section of the hull (1), the longitudinal section of the flow guide fin (3) being in the shape of an inverted airfoil section; the cross-sectional area of the deadwood body (2) gradually decreases in the direction from the first flow guide part (21) to the second flow guide part (22).

2. The twisted combination baulk structure according to claim 1, wherein the end face of the deadwood body (2) facing the hull (1) is conformal to the lower end face of the stern of the hull (1).

3. The twisted combination baulk structure according to claim 1, wherein the end face of the deadwood body (2) away from the hull (1) is parallel to the horizontal plane.

4. The twisted combination baulk structure according to claim 1, wherein the center horizontal line of the propeller (11) is located on the connecting surface of the first flow guide part (21) and the second flow guide part (22).

5. The twisted combination baulk structure according to claim 1, wherein the first flow guide part (21) and the second flow guide part (22) are in an integrated structure.

6. The twisted combination baulk structure according to claim 1, wherein the lower end face of the flow guide fin (3) is in the shape of an arc.

7. The twisted combination baulk structure according to claim 1, wherein the included angle between the flow guide fin (3) and the horizontal plane is 3°-12°.

8. A vessel characterised in that a ship comprising a hull (1) and a twisted combined deadwood structure as claimed in any one of claims 1-7, the twisted combined deadwood structure being fixedly arranged on the lower end face of the stern of the hull (1) and located in the middle part of the hull (1).

9. A manufacturing method, characterized by, a method for manufacturing a twisted combined deadwood structure as claimed in any one of claims 1-7, comprising the following steps: S1, performing a CFD simulation experiment on a ship to obtain the flow lines of the center line of a propeller (11); S2, determining the position of a deadwood body (2) according to the flow lines, i.e. the position of the intersection of a first flow guide part (21) and a second flow guide part (22); S3, manufacturing the deadwood body (2) according to the intersection position in the structure shape of being wide at the top and narrow at the bottom along the height direction of the deadwood body (2); S4, determining the included angle between a flow guide fin (3) and the horizontal plane according to the size of the propeller (11) and the CFD simulation experiment; S5, fixing the flow guide fin (3) on the deadwood body (2).

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