Air injection cavity structure for drag reduction of ship bottom air layer

Abstract

The embodiment of the utility model provides an air injection cavity structure for ship bottom air layer resistance reduction, and relates to the technical field of ship surface resistance reduction and energy conservation, the air injection cavity structure comprises a bottom plate and a through groove, the through groove is formed in the bottom plate, side plates are fixedly connected to the positions, located on the two sides of the through groove, of the top surface of the bottom plate, and a flow guide cover plate is fixedly connected between the two side plates; the rear side of the flow guide cover plate is arc-shaped, a fixing pipe is fixedly connected to the top face of the front side of the flow guide cover plate, and a plurality of air injection assemblies are evenly distributed on the two side plates. The fixing pipe is connected with the air injection equipment of the ship body, and the air inlet pipe is connected with the fixing pipe through the connecting pipeline, so that during use, air enters the inner cavity of the fixing shell through the fixing pipe connecting pipeline and the air inlet pipe in sequence, and is ejected into the inner cavity formed by the side plate and the flow guide cover plate through the air outlet pipe; and the bubbles are discharged from the through grooves under the guidance of the flow guide cover plate, so that the homogenization effect of the bubbles can be improved, and the resistance reduction effect is good.

Description

TECHNICAL FIELD

[0001] The embodiment of the present application relates to the ship surface drag reduction energy-saving technical field, and particularly relates to a jet cavity structure for ship bottom air layer drag reduction. BACKGROUND

[0002] The density of water is 800 times that of air, and the resistance to be overcome by a ship sailing in water is much larger than that in air, and the ship sailing resistance can be divided into viscous resistance and wave resistance according to the properties of fluid. The viscous resistance can be further divided into frictional resistance and viscous pressure resistance. For a low-speed large ship, the viscous resistance accounts for about 80%-90% of the total resistance, so reducing the viscous resistance of the low-speed large ship can effectively achieve the overall drag reduction effect.

[0003] The micro-bubble drag reduction technology in the prior art is one of mature drag reduction technologies, and the frictional resistance of the ship can be effectively reduced by jetting air at the ship bottom, and the drag reduction rate can be as high as 30%. However, the traditional micro-bubble drag reduction technology device has a great influence on the ship bottom during installation, thereby threatening the safety of the ship body and being not conducive to installation and use. In addition, the traditional micro-bubble drag reduction technology adopts a single jetting form to achieve the drag reduction effect, and the uniformity and effect of the bubble discharge are limited, which is not conducive to the improvement of the drag reduction effect.

[0004] Based on the above reasons, the utility model provides a jet cavity structure for ship bottom air layer drag reduction, which can effectively improve the convenience of installation and the effect of drag reduction. Utility model content

[0005] In view of the above problems, the embodiment of the present application provides a jet cavity structure for ship bottom air layer drag reduction to solve the problems of inconvenient installation and limited drag reduction effect of the prior art.

[0006] The embodiment of the present application provides a jet cavity structure for ship bottom air layer drag reduction, which comprises a bottom plate, a through slot is formed in the bottom plate, side plates are fixedly connected to the top surface of the bottom plate on both sides of the through slot, a flow guide cover plate is fixedly connected between the two side plates, the rear side of the flow guide cover plate is arc-shaped, a fixed pipe is fixedly connected to the top surface of the front side, a plurality of jetting assemblies are uniformly arranged on the two side plates, mounting plates are fixedly connected to the top surfaces of the two side plates, and mounting holes are formed in the mounting plates.

[0007] In some embodiments, the jetting assembly comprises a fixed shell, an air inlet pipe is fixedly connected to the top surface of the fixed shell, and an air outlet pipe is fixedly connected to the bottom surface of the fixed shell.

[0008] In some embodiments, the front side of the through slot is arc-shaped, and the rear side wall of the through slot is arc-shaped and tangent to the bottom surface of the rear side of the flow guide cover plate.

[0009] In some embodiments, a fixing plate is fixedly connected to the top surface of the back side of the flow guide cover plate, and a connecting plate is fixedly connected to the top surface of the fixing plate, and the fixing plate and the connecting plate are fixedly connected to the side plate.

[0010] In some embodiments, a flow guide plate is fixedly connected between the front side walls of the two side plates, and the bottom surface of the flow guide plate is fixedly connected to the bottom plate and the top surface of the flow guide plate is fixedly connected to a top plate.

[0011] Through the above scheme, by connecting the fixed pipe with the jet equipment of the ship body, and connecting the air inlet pipe with the fixed pipe through the connecting pipeline, in use, the gas enters into the inner cavity of the fixed shell through the fixed pipe, the connecting pipeline and the air inlet pipe in sequence, and is sprayed out into the inner cavity formed by the side plate and the flow guide cover plate through the air outlet pipe, and is discharged from the through slot through the guidance of the flow guide cover plate, the uniformization effect of the gas bubbles can be improved, and the drag reduction effect is good; in installation, through the setting of the mounting plate and the mounting hole, the device can be conveniently and quickly welded and connected and installed at the bottom of the ship, the structure of the bottom of the ship can be kept unchanged, the existing ship bottom structure does not need to be modified, and therefore the modification of the ship structure has little influence on the structural strength.

[0012] The above description is only a summary of the technical scheme of the embodiments of the present application, in order to more clearly understand the technical means of the embodiments of the present application, the embodiments of the present application can be implemented according to the content of the specification, and in order to make the above and other purposes, characteristics and advantages of the embodiments of the present application more obvious and easy to understand, the specific embodiments of the present application are described below. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced below, and obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creating labor.

[0014] Figure 1 It is a front perspective structural schematic diagram of the present application;

[0015] Figure 2 It is a side perspective structural schematic diagram of the present application;

[0016] Figure 3 It is a transverse cross-sectional perspective structural schematic diagram of the present application;

[0017] Figure 4 It is a perspective structural schematic diagram of the flow guide cover plate of the present application;

[0018] Figure 5 It is a perspective structural schematic diagram of the bottom plate of the present application.

[0019] Reference Signs List:

[0020] 1 bottom plate; 2 through slot; 3 side plate; 4 flow guide cover plate; 5 fixed tube; 6 fixed shell; 7 air inlet pipe; 8 air outlet pipe; 9 mounting plate; 10 mounting hole; 11 fixed plate; 12 connecting plate; 13 flow guide plate; 14 top plate. DETAILED DESCRIPTION

[0021] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0022] The terms “comprise” and “have” and any variations thereof in the specification and claims of the present application and the description of the drawings are intended to cover but not exclude other content. The word “one” or “a” does not exclude the presence of multiple. Unless otherwise specified, the meaning of “multiple” is two or more (including two).

[0023] The orientation words appearing in the following description are the directions shown in the drawings, and are not limited to the specific structure of the present application. For example, in the description of the present application, the orientation or position relationship indicated by the terms “length”, “width”, “thickness”, “upper”, “lower”, “front”, “rear”, “left”, “right”, “inner”, “outer”, “axial direction”, “radial direction”, “circumferential direction” and the like are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and are not intended to indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0024] In addition, the expressions of the indicating directions for describing the operation and structure of each component of the embodiments, such as the height direction, are not absolute but relative, and although the indications are appropriate when each component is in the position shown in the drawings, the directions should be interpreted differently when the positions are changed to correspond to the changes.

[0025] 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 in a broad sense, for example, the "connection" or "connecting" of mechanical structure can mean physical connection, such as fixed connection, detachable connection or integral connection. The "connection" or "connecting" of circuit structure can mean not only physical connection, but also electrical connection or signal connection, for example, it can be direct connection, that is, physical connection, or indirect connection through at least one intermediate element, as long as the circuit is connected. 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.

[0026] In order to facilitate the understanding of the technical solutions of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0027] As shown in Figures 1-5 , the present application provides a kind of for ship bottom gas layer drag reduction jet cavity structure, its characterized in that, bottom plate 1 is equipped with through slot 2, bottom plate 1 top surface is located in the both sides of through slot 2 and is fixedly connected with side plate 3, two side plates 3 are fixedly connected with flow guide cover plate 4 between, flow guide cover plate 4 rear side is arc-shaped and front side top surface is fixedly connected with fixed tube 5, several jet assemblies are evenly distributed and arranged on two side plates 3, jet assembly includes fixed shell 6, fixed shell 6 top surface is fixedly connected with air inlet pipe 7, fixed shell 6 bottom surface is fixedly connected with air outlet pipe 8;

[0028] In the technical scheme of the present embodiment, by connecting the fixed tube 5 with the jet equipment of the ship body, and connecting the air inlet pipe 7 with the fixed tube 5 through the connecting pipeline, in use, the gas enters into the inner cavity of the fixed shell 6 through the fixed tube 5 connecting pipeline and air inlet pipe 7 in turn, and is sprayed into the inner cavity formed by the side plate 3 and the flow guide cover plate 4 through the air outlet pipe 8, and is discharged from the through slot 2 through the guidance of the flow guide cover plate 4, which can improve the homogenization effect of the gas bubbles and improve the drag reduction effect.

[0029] As shown in Figure 3 and Figure 4 , further, the front side of the through slot 2 is arc-shaped, and the rear side wall of the through slot 2 is arc-shaped and tangent to the rear side bottom surface of the flow guide cover plate 4, which facilitates the diffusion of the gas bubbles, so that the gas bubbles fully cover the ship bottom structure and improve the drag reduction effect.

[0030] As shown in Figures 1-3 , further, the rear side top surface of the flow guide cover plate 4 is fixedly connected with a fixed plate 11, and the top surface of the fixed plate 11 is fixedly connected with a connecting plate 12, both the fixed plate 11 and the connecting plate 12 are fixedly connected with the side plate 3, which can improve the stability and firmness of the device.

[0031] AsFigure 1 and Figure 3 As shown, mounting plates 9 are fixedly connected to the top surfaces of both side plates 3, and mounting holes 10 are provided on the mounting plates 9.

[0032] In the technical solution of this embodiment, during installation, the device can be conveniently and quickly welded and installed on the bottom of the ship by setting the mounting plate 9 and mounting holes 10, so that the bottom structure of the ship remains unchanged and there is no need to modify the existing bottom structure of the ship. Therefore, it has basically no impact on the structural strength of the modified ship.

[0033] like Figures 1-3 As shown, a guide plate 13 is fixedly connected between the front side walls of the two side plates 3. The bottom surface of the guide plate 13 is fixedly connected to the bottom plate 1, and a top plate 14 is fixedly connected to the top surface. This can guide the water flow, reduce the resistance of the device, and improve the drag reduction effect.

[0034] Those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of this application and form different embodiments. For example, in the claims, any of the claimed embodiments can be used in any combination.

[0035] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A structure of a jet cavity for reducing the drag of a ship bottom gas layer, characterized by, The utility model relates to a kind of air jet cooling device, including bottom plate (1), the bottom plate (1) is equipped with through slot (2), the top surface of bottom plate (1) is located through slot (2) both sides and is fixedly connected with side plate (3), two The side plate (3) between fixedly connected with flow cover plate (4), the rear side of flow cover plate (4) is arc and front top surface is fixedly connected with fixed pipe (5), two The side plate (3) is evenly distributed and set with several air jet assemblies, the top surface of two side plate (3) is fixedly connected with mounting plate (9), and mounting plate (9) is equipped with mounting hole (10).

2. The air cavity structure for the air layer of the ship bottom according to claim 1, characterized in that, The air jet assembly includes fixed shell (6), the top surface of fixed shell (6) is fixedly connected with air inlet pipe (7), and the bottom surface of fixed shell (6) is fixedly connected with air outlet pipe (8).

3. The air cavity structure for the air layer of the ship bottom according to claim 1, characterized in that, The front side of the through slot (2) is arc-shaped, and the rear side wall of the through slot (2) is arc-shaped and tangent to the rear bottom surface of the flow cover plate (4).

4. The air cavity structure for the air layer of the ship bottom according to claim 1, characterized in that, The rear top surface of the flow cover plate (4) is fixedly connected with a fixed plate (11), the top surface of the fixed plate (11) is fixedly connected with a connecting plate (12), and the fixed plate (11) and the connecting plate (12) are fixedly connected with the side plate (3).

5. The air cavity structure for the air layer of the ship bottom according to claim 1, characterized in that, The front side wall of the two side plates (3) is fixedly connected with a flow guide plate (13), the bottom surface of the flow guide plate (13) is fixedly connected with the bottom plate (1), and the top surface of the flow guide plate (13) is fixedly connected with a top plate (14).

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