A self-sustaining airship drag reduction device

Abstract

The application discloses a self-gas-keeping ship drag reduction device, which is composed of multiple groups of drag reduction units, and each drag reduction unit comprises a main air film box and a plurality of auxiliary air film boxes. The bottom of the main air film box is provided with a main air film cavity, and the auxiliary air film boxes are evenly arranged in the main air film cavity. Each group of auxiliary air film boxes is connected with the inner wall of the top of the main air film cavity through a flexible piece. The bottom of each group of auxiliary air film boxes is provided with an auxiliary air film cavity. The main air film cavity and each group of auxiliary air film cavities are connected with a gas supply system such as an air compressor on the ship through an air inlet pipe to obtain gas for filling. Air film gaps are formed between adjacent auxiliary air film boxes and between the auxiliary air film boxes and the main air film box. The main air film box is provided with a sealing film for plugging the air film gaps. The application keeps air existing in the contact part between the ship body and water, reduces the energy consumption by reducing the running resistance of the ship, and realizes the air-keeping effect by arranging multiple groups of auxiliary air film boxes in the main air film cavity of each group of main air film boxes.

Description

TECHNICAL FIELD

[0001] The present application relates to a ship energy-saving device, in particular to a self-preservation air ship drag reduction device. BACKGROUND

[0002] When the ship is running, because the ship body and the water contact part will occur viscous resistance and wave resistance, so the energy to push the ship forward is mostly consumed by viscous resistance and wave resistance. The frictional resistance of air and water is small. Therefore, a self-preservation air ship drag reduction device is designed to ensure that there is air in the contact part of the ship body and water at all times, thereby reducing the energy consumption by reducing the running resistance of the ship. SUMMARY

[0003] The purpose of the present application is to provide a self-preservation air ship drag reduction device to solve the above technical problems.

[0004] To achieve the above purpose, the present application provides the following technical scheme: a self-preservation air ship drag reduction device, the drag reduction device is composed of a plurality of drag reduction units fixed to the outer wall of the bottom of the ship, the drag reduction unit includes a main air film box and a secondary air film box, the bottom of the main air film box is provided with a main air film cavity, the secondary air film box is uniformly filled and arranged in the main air film cavity, each group of secondary air film box and the inner wall of the top of the main air film cavity are connected by a flexible piece, the bottom of each group of secondary air film box is provided with a secondary air film cavity, the main air film cavity and each group of secondary air film cavity are connected by an air pipe and a gas supply system such as an air compressor on the ship to obtain gas for filling, the adjacent secondary air film boxes and the secondary air film boxes and the main air film boxes are all formed with air film gaps, and the main air film box is provided with a sealing film for plugging the air film gap.

[0005] Preferably, the secondary air film box is a hexagonal box with an open bottom, and a plurality of secondary air film boxes form a honeycomb structure arrangement in the column air film cavity.

[0006] Preferably, the flexible piece is a polyester filament.

[0007] Preferably, the flexible piece is a polyethylene filament.

[0008] Preferably, the flexible piece is a metal chain.

[0009] Preferably, the flexible piece is a metal chain.

[0010] Preferably, the sealing film is a silica gel film.

[0011] Preferably, the secondary air film box is provided with a resistance sensor.

[0012] Preferably, the main air film box is provided with a ship side wave inductor.

[0013] Compared with the prior art, the present application has the following advantages:

[0014] The air film box is composed of several regular hexagon sub-air film boxes and a main air film box, and the basic units are combined according to the shape and area of the ship body, so that the air can exist in the contact part of the ship body and water at all times, the air leakage time in the main air film cavity is reduced to realize air preservation, the running resistance of the ship is reduced, and the energy consumption is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0016] Fig. 1 is a structural diagram of the present application highlighting the main air film box and the sub-air film box;

[0017] Fig. 2 is a schematic diagram of the sealing film of the present application;

[0018] Fig. 3 is a sectional view schematic diagram of the present application highlighting the position of the flexible part.

[0019] In the drawings, the components represented by each number are listed as follows:

[0020] 1, drag reduction unit; 101, main air film box; 102, sub-air film box; 103, sealing film; 104, flexible part; 2, main air film cavity; 3, sub-air film cavity; 4, air film gap; 5, air inlet pipe. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be described clearly and completely in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0022] Please refer to Figs. 1-3 , the present application provides a technical solution:

[0023] The application discloses a self-preservation air ship drag reduction device, which is composed of a plurality of groups of drag reduction units 1 fixed to the outer wall of the bottom of the ship, the number of the drag reduction units 1 is adaptively determined according to the size of the bottom area of the ship body, each group of the drag reduction units 1 comprises a main air film box 101 and a secondary air film box 102, the plurality of groups of the drag reduction units 1 can be fixed to the bottom of the ship through the main air film box 101, the fixing can adopt welding or fixing a support with an adaptive shape on the bottom of the ship, and then the main air film box 101 is fixed to the bottom of the ship through the support, a main air film cavity 2 is arranged at the bottom of the main air film box 101, the secondary air film boxes 102 are uniformly arranged in the main air film cavity 2, and each group of the secondary air film boxes 102 and the inner wall of the top of the main air film cavity 2 are connected through a flexible piece 104, wherein the flexible piece 104 can be in a rope structure, the flexible piece 104 is preferably made of a material with wear resistance, corrosion resistance, flexible bending, low elongation and certain strength, for example, the flexible piece 104 can be made of polyester silk, chinlon silk, ethylene silk and metal chain and the like, and the selection is specifically made according to the main water area where the ship sails, the flexible piece 104 mainly serves to connect the secondary air film box 102 with the main air film box 101 and enable the secondary air film box 102 to swing freely in the main air film box 101, and it should be noted that the vertical connection of the secondary air film box 102 and the main air film box 101 is achieved by suspending the secondary air film box 102 in the main air film box 101 at the gravity center balance point of the secondary air film box by using the material with low elongation and flexible bending.

[0024] A secondary air film cavity 3 is arranged at the bottom of each group of the secondary air film boxes 102, the main air film cavity 2 and each group of the secondary air film cavities 3 are connected with a gas supply system such as an air compressor on the ship through an air inlet pipe 5 to obtain gas for filling, a plurality of air inlet pipes 5 can be arranged in a bundle, and the arrangement can be adaptively adjusted according to the fixing mode of the main air film box 101 and the bottom of the ship, the air film gaps 4 are formed between adjacent secondary air film boxes 102 and between the secondary air film boxes 102 and the main air film box 101, a sealing film 103 for plugging the air film gaps 4 is arranged in the main air film box 101, the sealing film 103 can be made of a silica gel film or other material film, mainly for realizing the sealing of the air film gaps 4, limiting the gas from being discharged from the main air film cavity 2 through the air film gaps 4 between the secondary air film boxes 102 and the main air film box 101 and between adjacent secondary air film boxes 102, and the soft film can limit the left-right swinging of the secondary air film boxes 102 and cannot limit the up-down movement of the secondary air film boxes 102.

[0025] Wherein the secondary air film box 102 is vertically suspended by flexible member, the bottom height is equal to the bottom end surface of the primary air film box 101, when the bottom of the ship is below the horizontal plane, the air supply system pumps air into the primary air film cavity 2 and the secondary air film cavity 3 through the air inlet pipe 5 and discharges water, the water level of the primary air film cavity 2 is to the position of the sealing membrane 103 after discharging water, the primary air film box 101 is connected with the ship side wave sensor, when the ship side wave sensor senses that the state of the sealing membrane 103 changes, the signal is transmitted to the control system in the ship, and the corresponding pressure adjustment of the primary air film cavity 2 is driven, so that the air pressure in the primary air film cavity 2 returns to the set value. The secondary air film box 102 is provided with a resistance sensor, when the resistance sensor detects that water enters the secondary air film cavity 3, the resistance sensor transmits a signal to the control system in the ship, the valve of the air inlet pipe 5 connected with the secondary air film cavity 3 is opened, air is pumped into the secondary air film cavity 3 through the air compressor, water in the secondary air film cavity 3 is discharged, so that the water level is at the position of the sealing membrane 103, wherein after air is pumped into the primary air film cavity 2, the secondary air film box 102 is in a gas wrapped environment, the resistance received during the swing of the ship during operation is smaller, the secondary air film box 102 is connected with the primary air film box 101 through the flexible member 104, when the ship moves, the secondary air film box 102 reduces the swing amplitude due to small resistance, ensures the stability of the internal air pressure, reduces the adverse factors of air leakage in the secondary air film cavity 3, and since multiple secondary air film cavities 3 are arranged in the primary air film cavity 2, the air leaked outward due to the swing of the secondary air film box 102 in the middle is supplemented into the surrounding adjacent secondary air film boxes 102, and the air is not leaked to the outside of the primary air film box 101 as soon as it is leaked, thereby reducing the frequency of air supplement of the air compressor to the primary air film cavity 2 and the secondary air film cavity 3, thereby reducing the energy consumption.

[0026] Specifically, the secondary air film box 102 is a hexagonal box with an open bottom, and multiple groups of secondary air film boxes 102 are arranged in a honeycomb structure in the column air film cavity. The secondary air film boxes 102 arranged in a regular hexagon can increase the stability of the resistance reduction device more. It should be noted that after the secondary air film boxes 102 arranged in a regular hexagon are arranged in the primary air film cavity 2, when the secondary air film boxes 102 cannot be arranged in a complete regular hexagon between the primary air film cavity 2 and the outermost secondary air film box 102, in order to avoid too large gap, the secondary air film boxes 102 arranged in a partial regular hexagon can be arranged.

[0027] Referring to Figs. 1-3 When the device is used, multiple resistance reduction units 1 are fixed to the adaptive position of the bottom of the ship, after the multiple resistance reduction units 1 are all submerged below the horizontal plane, air is pumped into the primary air film cavity 2 and the secondary air film cavity 3 through the air compressor, water in the primary air film cavity 2 and the secondary air film cavity 3 is discharged, until the water is submerged to the position of the sealing membrane 103, so that air exists in the contact part between the ship body and the water, and the ship driving resistance is reduced.

[0028] During the running, the ship shakes and the main air film box 101 shakes simultaneously, which causes the air pressure in the main air film cavity 2 to change, the ship side wave sensor will transmit the monitoring signal to the control system, the control system will open the valve corresponding to the air inlet pipe 5 and adjust the pressure to the main air film cavity 2 according to the air pressure change value, so that the sealing film 103 is in the best state; when the secondary air film box 102 shakes and causes the gas in the secondary air film cavity 3 to leak to the threshold value set by the resistance sensor, the resistance sensor in the corresponding secondary air film cavity 3 will transmit the monitoring signal to the control system, and the valve of the air inlet pipe 5 connected with the corresponding secondary air film box 102 is opened, and then the air compressor is pumped to make the air pressure in the secondary air film cavity 3 reach the required threshold value.

[0029] In the above manner, the ship body and the water contact part can always have stable air, that is, the running resistance of the ship can be reduced, so that the energy consumption is reduced.

[0030] In the description of the present application, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inner", "front", "central", "both ends" and the like indicate the orientation or positional relationship based on the orientation or positional relationship of the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0031] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "setting", "connecting", "fixing", "screw connection" and the like should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited, the above-mentioned terms in the present application can be understood according to the specific meaning of the above-mentioned terms in the present application by the person skilled in the art according to the specific situation.

[0032] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that modifications can be made to the embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A drag reduction device for a self- sustaining airship, characterized by: The drag reduction device consists of multiple drag reduction units (1) fixed to the outer wall of the bottom of the ship. Each drag reduction unit (1) includes a main air film box (101) and an auxiliary air film box (102). The main air film box (101) has a main air film cavity (2) at its bottom. The auxiliary air film boxes (102) are evenly filled in the main air film cavity (2). Each auxiliary air film box (102) is connected to the inner wall of the top of the main air film cavity (2) by a flexible component (104). The bottom of the membrane box (102) is provided with a secondary air membrane chamber (3). The main air membrane chamber (2) and each group of secondary air membrane chambers (3) are connected to the air supply system on the ship through air pipes (5) to obtain gas for filling. Air membrane gaps (4) are formed between adjacent secondary air membrane boxes (102) and between secondary air membrane boxes (102) and main air membrane boxes (101). The main air membrane box (101) is provided with a sealing membrane (103) for sealing the air membrane gaps (4).

2. A drag reduction device for a self- preserving vessel as claimed in claim 1, wherein: The auxiliary air membrane box (102) is a hexagonal box with an open bottom, and multiple sets of auxiliary air membrane boxes (102) are arranged in a honeycomb structure inside the main air membrane cavity.

3. A drag reduction device for a self- preserving vessel as claimed in claim 1, wherein: The flexible component (104) is made of polyester yarn.

4. A drag reduction device for a self- preserving vessel as claimed in claim 1, wherein: The flexible component (104) is nylon yarn.

5. A self-protecting air-cushioned ship drag reduction device according to claim 1, characterized in that: The flexible member (104) is Gather Ethylene yarn.

6. A drag reduction device for a self- preserving airship vessel as defined in claim 1, wherein: The flexible component (104) is a metal chain.

7. A self-protecting air-cushioned ship drag reduction device according to claim 1, characterized in that: The sealing membrane (103) is made of silicone.

8. A self-protecting air-cushioned ship drag reduction device according to claim 1, characterized in that: The auxiliary air film box (102) is equipped with a resistance sensor.

9. A self-protecting air-cushioned ship drag reduction device according to claim 1, characterized in that: The main air film box (101) is equipped with a ship's side wave sensor.

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