Bubble resistance reduction device and ship

Abstract

The invention belongs to the technical field of ship resistance reduction devices, and discloses a bubble resistance reduction device and a ship. The bubble drag reduction device comprises a gas generator, a bubble generator and a bubble breaker. The gas generator can generate compressed gas. The bubble generator is installed at the bottom of the ship and communicates with the gas generator, and compressed gas generates first bubbles through the bubble generator to be discharged. And the bubble breaker is positioned at the downstream of the bubble generator and is communicated with the bubble generator. The bubble breaker has an open state and a closed state, when the bubble breaker is in the open state, the first bubbles are broken into second bubbles through the bubble breaker, and the second bubbles flow into the bottom of the ship; when the bubble breaker is in a closed state, the first bubbles are directly discharged and flow into the bottom of the ship, the universality is high, and the drag reduction effect is good; structural operation is simple, and cost is low. The ship comprises a ship body and the bubble drag reduction device, and the bubble drag reduction device is located at the bottom of the ship body, so that the ship is high in overall operation efficiency and low in cost.

Description

Technical Field

[0001] The present invention relates to the technical field of ship drag reduction devices, and in particular to a bubble drag reduction device and a ship. Background Art

[0002] Usually, when a ship is sailing, bubbles are supplied to the outside of the ship below the waterline to reduce the friction between the ship and the water, thereby improving navigation efficiency. When a ship is sailing in open waters, water resistance is dominant, and evenly distributed small-sized bubbles have a better drag reduction effect, improving the operational efficiency of the ship when sailing in open waters. When a ship is sailing in icy waters, ice resistance is dominant, and large-sized bubbles can effectively reduce the ice resistance of the ship and improve the operational efficiency of the ship when sailing in icy waters. However, the bubble drag reduction system in the prior art can only produce bubbles of one size, which cannot meet the requirements of ships sailing in open waters and icy waters at the same time.

[0003] Therefore, it is urgent to propose a bubble drag reduction device and a ship to solve the above problems. Summary of the invention

[0004] The first object of the present invention is to provide a bubble drag reduction device, which has high universality and good drag reduction effect; the structure is simple to operate and the cost is low.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] The air bubble drag reduction device comprises:

[0007] a gas generator capable of generating compressed gas;

[0008] A bubble generator, which is installed at the bottom of the ship and is connected to the gas generator, and the compressed gas is discharged by generating first bubbles through the bubble generator;

[0009] A bubble breaker, the bubble breaker is located downstream of the bubble generator and is connected to the bubble generator. The bubble breaker has an open state and a closed state. When the bubble breaker is in the open state, the first bubble is broken by the bubble breaker to become a second bubble, and the second bubble flows into the bottom of the ship. When the bubble breaker is in the closed state, the first bubble is directly discharged and flows into the bottom of the ship.

[0010] As an optional technical solution of the bubble drag reduction device, the bubble generator is embedded in the ship.

[0011] As an optional technical solution for the bubble drag reduction device, the bubble generator includes a top plate, a side plate and a nozzle plate. The top plate is connected to the gas generator. The nozzle plate is located below the top plate. Nozzle holes are evenly arranged on the nozzle plate. The side plate connects the top plate and the nozzle plate. The top plate, the side plate and the nozzle plate are arranged to form a compression chamber. The compressed air enters the compression chamber and is discharged from the nozzle hole to form the first bubble.

[0012] As an optional technical solution for the bubble drag reduction device, the aperture of the nozzle hole is 0.01m-0.1m.

[0013] As an optional technical solution for the bubble drag reduction device, the bubble generator also includes a partition, which is located in the compression chamber and divides the compression chamber into a plurality of chambers. The plurality of chambers are evenly arranged along the length direction of the ship, and each of the chambers is connected to the gas generator.

[0014] As an optional technical solution for the bubble drag reduction device, the bubble breaker includes a baffle, which is connected to the outer periphery of the nozzle plate. When the bubble breaker is in the open state, the nozzle plate and the baffle are arranged to form a crushing chamber, and the first bubble can be interrupted and crushed by the water flow entering the crushing chamber to form the second bubble, and the second bubble is discharged and flows into the bottom of the ship; when the bubble breaker is in the closed state, the baffle can be turned outward and flush with the bottom of the ship, and the first bubble is directly discharged and flows into the bottom of the ship.

[0015] As an optional technical solution of the bubble drag reduction device, the compression chamber and the crushing chamber are both located near the bow of the ship.

[0016] As an optional technical solution of the bubble drag reduction device, the height H of the crushing chamber is less than 0.5m.

[0017] As an optional technical solution of the bubble drag reduction device, the gas generator includes an air compressor and an air pipeline, and the air compressor is connected to the bubble generator through the air pipeline.

[0018] A second object of the present invention is to provide a ship having high overall operating efficiency and low cost.

[0019] To achieve this object, the present invention adopts the following technical solutions:

[0020] A ship comprises a hull and the above-mentioned bubble drag reduction device, wherein the bubble drag reduction device is located at the bottom of the hull.

[0021] Beneficial effects of the present invention:

[0022] The bubble drag reduction device provided by the present invention comprises a gas generator, a bubble generator and a bubble breaker. The gas generator can generate compressed gas, and the compressed gas is discharged by generating a first bubble through the bubble generator. The bubble breaker has an open state and a closed state. When the bubble breaker is in the open state, the first bubble is broken into a second bubble by the bubble breaker, and the second bubble flows into the bottom of the ship. The second bubble is small in size, which has a good drag reduction effect on the ship and improves the operation efficiency of the ship when sailing in open waters. When the bubble breaker is in the closed state, the first bubble is directly discharged and flows into the bottom of the ship. The first bubble is large in size, which can effectively reduce the ice resistance of the ship and improve the operation efficiency of the ship when sailing in ice waters. Therefore, the bubble drag reduction device can choose to open or close the bubble breaker as needed, so that the large-sized first bubble or the small-sized second bubble can play a drag reduction role, which increases the universality of the bubble drag reduction device; and the overall drag reduction effect of the bubble drag reduction device is improved, thereby improving the overall operation efficiency of the ship. At the same time, the size of the bubble can be adjusted by only choosing to open or close the bubble breaker, and the structure is simple to operate and the manufacturing cost is low.

[0023] The ship provided by the present invention, because it is equipped with the above-mentioned bubble drag reduction device, can generate bubbles of two sizes, larger and smaller, so that the ship can meet the navigation requirements in open waters and icy waters at the same time, thereby making the overall operation efficiency of the ship high and the cost low. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a structural schematic diagram of a ship equipped with a bubble drag reduction device provided by an embodiment of the present invention;

[0025] Figure 2 The structure of the bubble drag reduction device provided by the embodiment of the present invention is schematically shown in FIG. Figure 1 ;

[0026] Figure 3 The structure of the bubble drag reduction device provided by the embodiment of the present invention is schematically shown in FIG. Figure 2 ;

[0027] Figure 4 It is a schematic diagram of the structure of the nozzle plate of the bubble drag reduction device provided in an embodiment of the present invention.

[0028] In the figure:

[0029] 100, gas generator; 110, air compressor; 120, air duct; 200, bubble generator; 210, top plate; 220, side plate; 230, nozzle plate; 231, nozzle hole; 240, partition; 250, first bubble; 300, bubble breaker; 310, baffle; 320, second bubble. DETAILED DESCRIPTION

[0030] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0031] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0033] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0034] The bubble drag reduction device provided in this embodiment has high universality and good drag reduction effect; it has simple structure and operation and low cost.

[0035] Specific as Figures 1 to 3As shown, the bubble drag reduction device includes a gas generator 100, a bubble generator 200 and a bubble breaker 300. The gas generator 100 can generate compressed gas. The bubble generator 200 is installed at the bottom of the ship and is connected to the gas generator 100. The compressed gas is discharged through the bubble generator 200 to generate the first bubble 250. The bubble breaker 300 is located downstream of the bubble generator 200 and is connected to the bubble generator 200. The bubble breaker 300 has an open state and a closed state. When the bubble breaker 300 is in the open state, the first bubble 250 is broken by the bubble breaker 300 to become the second bubble 320, and the second bubble 320 flows into the bottom of the ship; when the bubble breaker 300 is in the closed state, the first bubble 250 is directly discharged and flows into the bottom of the ship.

[0036] It should be noted that the size of the first bubble 250 is larger than the size of the second bubble 320 .

[0037] Based on the above design, the gas generator 100 can generate compressed gas, and the compressed gas is discharged by generating the first bubble 250 through the bubble generator 200. The bubble breaker 300 has an open state and a closed state. When the bubble breaker 300 is in the open state, the first bubble 250 is broken by the bubble breaker 300 to become the second bubble 320, and the second bubble 320 flows into the bottom of the ship. The second bubble 320 is small in size and has a good drag reduction effect on the ship, thereby improving the operational efficiency of the ship when sailing in open waters. When the bubble breaker 300 is in the closed state, the first bubble 250 is directly discharged and flows into the bottom of the ship. The first bubble 250 is large in size, which can effectively reduce the ice resistance of the ship and improve the operational efficiency of the ship when sailing in ice waters. Therefore, the bubble drag reduction device can choose to open or close the bubble breaker 300 as needed, so that the large-sized first bubble 250 or the small-sized second bubble 320 can play a drag reduction role, thereby increasing the universality of the bubble drag reduction device; and the overall drag reduction effect of the bubble drag reduction device is improved, thereby improving the overall operational efficiency of the ship. At the same time, the size of the bubbles can be adjusted simply by turning on or off the bubble breaker 300, and the structure is simple to operate and has low manufacturing cost.

[0038] Furthermore, the bubble generator 200 is embedded in the ship to prevent the bubble generator 200 from being exposed and increasing the resistance of the ship.

[0039] In this embodiment, Figure 4As shown, the bubble generator 200 includes a top plate 210, a side plate 220 and a nozzle plate 230. The top plate 210 is connected to the gas generator 100. The nozzle plate 230 is located below the top plate 210. The nozzle plate 230 is evenly provided with nozzle holes 231. The side plate 220 connects the top plate 210 and the nozzle plate 230. The top plate 210, the side plate 220 and the nozzle plate 230 are surrounded to form a compression chamber. The compressed air enters the compression chamber and is discharged from the nozzle hole 231 to form a first bubble 250. The bubble generator 200 has a simple structure, a simple mechanism for generating the first bubble 250, and a low manufacturing cost, thereby reducing the manufacturing cost of the bubble drag reduction device. Optionally, the aperture of the nozzle hole 231 is 0.01m-0.1m. Exemplarily, the aperture can be 0.01m, 0.03m, 0.05m, 0.07m, 0.09m or 0.1m, etc.

[0040] Furthermore, the bubble generator 200 further includes a partition 240, which is located in the compression chamber and divides the compression chamber into a plurality of chambers, the plurality of chambers are evenly arranged along the length direction of the ship, and each chamber is connected to the gas generator 100. This arrangement enables the nozzle plate 230 to correspond to a plurality of chambers, and each chamber is independently air-intaked, so that the airflow can be controlled and the pressure distribution on the nozzle plate 230 can be adjusted to avoid uneven pressure distribution on the nozzle plate 230.

[0041] The number of chambers is determined according to the length dimension (L in the figure) of the bubble generator 200 along the length direction of the ship. It should be noted that the length dimension of each chamber along the length direction of the ship does not exceed 0.5m. For example, the length dimension of each chamber along the length direction of the ship can be 0.1m, 0.2m, 0.3m or 0.4m, etc.

[0042] In this embodiment, the number of chambers is three, but it can also be two, four, five or six, etc., which is not limited in the present invention.

[0043] The bubble breaker 300 includes a baffle 310, which is connected to the outer periphery of the nozzle plate 230. When the bubble breaker 300 is in an open state, the nozzle plate 230 and the baffle 310 are arranged to form a crushing chamber, and the first bubble 250 can be sheared and crushed by the water flow entering the crushing chamber to form a second bubble 320, and the second bubble 320 is discharged and flows into the bottom of the ship; when the bubble breaker 300 is in a closed state, the baffle 310 can be turned outward to be flush with the bottom of the ship, and the first bubble 250 is directly discharged and flows into the bottom of the ship. The opening and closing of the bubble breaker 300 is realized by folding the baffle 310 to adjust the position of the baffle 310, the structure is simple to operate, and the large-sized first bubble 250 is sheared by the turbulence of the water flow to form a uniformly distributed small-sized second bubble 320, the conversion mechanism is simple, and the cost is low.

[0044] In order to achieve a crushing effect and prevent the second bubbles 320 from colliding and disappearing, the height H of the crushing chamber cannot be too large. Preferably, the height H of the crushing chamber is less than 0.5 m. For example, H can be 0.1 m, 0.2 m, 0.3 m, or 0.4 m.

[0045] In order to cover the bottom of the ship with the first bubbles 250 or the second bubbles 320, the compression chamber and the crushing chamber are both located near the bow of the ship. When the ship moves forward, the first bubbles 250 or the second bubbles 320 flow out and move backward relative to the ship to cover the entire bottom of the ship.

[0046] It should be noted that the direction of the arrow in the figure is the direction of water flow.

[0047] Continue as Figure 1 As shown, the gas generator 100 includes an air compressor 110 and an air pipeline 120 , and the air compressor 110 is communicated with the bubble generator 200 through the air pipeline 120 .

[0048] This embodiment also provides a ship with high overall operating efficiency and low cost.

[0049] Specific as Figure 1 As shown, the ship includes a hull and the above-mentioned bubble drag reduction device, which is located at the bottom of the hull. Due to the installation of the above-mentioned bubble drag reduction device, bubbles of larger and smaller sizes can be generated, so that the ship can meet the navigation requirements in open waters and ice waters at the same time, thereby making the overall operation efficiency of the ship high and the cost low.

[0050] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. Bubble drag reduction device, characterized in that: include: A gas generator (100), wherein the gas generator (100) is capable of generating compressed gas; a bubble generator (200), the bubble generator (200) being installed on the bottom of the ship and being in communication with the gas generator (100), the compressed gas being discharged after generating first bubbles (250) through the bubble generator (200); A bubble breaker (300), the bubble breaker (300) is located downstream of the bubble generator (200) and is in communication with the bubble generator (200), the bubble breaker (300) has an open state and a closed state, when the bubble breaker (300) is in the open state, the first bubble (250) is broken by the bubble breaker (300) to become a second bubble (320), and the second bubble (320) flows into the bottom of the ship, when the bubble breaker (300) is in the closed state, the first bubble (250) is directly discharged and flows into the bottom of the ship.

2. The bubble drag reduction device according to claim 1, characterized in that: The bubble generator (200) is embedded in the ship.

3. The bubble drag reduction device according to claim 2, characterized in that: The bubble generator (200) comprises a top plate (210), a side plate (220) and a nozzle plate (230); the top plate (210) is connected to the gas generator (100); the nozzle plate (230) is located below the top plate (210); nozzle holes (231) are evenly arranged on the nozzle plate (230); the side plate (220) connects the top plate (210) and the nozzle plate (230); the top plate (210), the side plate (220) and the nozzle plate (230) are surrounded to form a compression chamber; the compressed air enters the compression chamber and is discharged from the nozzle hole (231) to form the first bubble (250).

4. The bubble drag reduction device according to claim 3, characterized in that: The diameter of the nozzle hole (231) is 0.01m-0.1m.

5. The bubble drag reduction device according to claim 3, characterized in that: The bubble generator (200) further comprises a partition (240), wherein the partition (240) is located in the compression chamber and divides the compression chamber into a plurality of chambers, wherein the plurality of chambers are evenly arranged along the length direction of the ship, and each of the chambers is connected to the gas generator (100).

6. The bubble drag reduction device according to claim 3, characterized in that: The bubble breaker (300) comprises a baffle (310), wherein the baffle (310) is connected to the outer periphery of the nozzle plate (230); when the bubble breaker (300) is in the open state, the nozzle plate (230) and the baffle (310) are arranged to form a crushing chamber, and the first bubble (250) can be broken by the water flow entering the crushing chamber in the crushing chamber to form the second bubble (320), and the second bubble (320) is discharged and flows into the bottom of the ship; when the bubble breaker (300) is in the closed state, the baffle (310) can be turned outward to be flush with the bottom of the ship, and the first bubble (250) is directly discharged and flows into the bottom of the ship.

7. The bubble drag reduction device according to claim 6, characterized in that: The compression chamber and the crushing chamber are both located near the bow of the ship.

8. The bubble drag reduction device according to claim 6, characterized in that: The height H of the crushing chamber is less than 0.5 m.

9. The bubble drag reduction device according to claim 1, characterized in that: The gas generator (100) comprises an air compressor (110) and an air pipe (120), and the air compressor (110) is in communication with the bubble generator (200) through the air pipe (120).

10. A vessel, characterized in that It comprises a ship body and the bubble drag reduction device according to any one of claims 1 to 9, wherein the bubble drag reduction device is located at the bottom of the ship body.

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