Bubble breaking spray head for ship resistance reduction

Abstract

The utility model relates to the technical field of ship bubble resistance reduction, in particular to a bubble breaking spray head for ship resistance reduction, which comprises a bubble breaking spray head, the bubble breaking spray head comprises a hydraulic motor, a rotating shaft and a plurality of triangular blocks, the hydraulic motor is connected with the rotating shaft, and the triangular blocks penetrate through the rotating shaft. The triangular blocks are fixed to the rotating shaft, the hydraulic motor is installed at one end of the bottom of the storage box, grooves for storing the triangular blocks are formed in the bottom of the storage box, the storage box is installed at the bottom of the ship, and a plurality of circular spraying holes are formed in the top of the storage box. According to the bubble breaking sprayer, the hydraulic motor is adopted to drive the triangular blocks on the rotating shaft to unfold from the interior of the storage box, gas entering the storage box is scattered through the triangular blocks to form small bubbles, the small bubbles are attached to the ship bottom to achieve the resistance reduction effect, the gas inlet pipeline is composed of the Laval pipe, water flow is prevented from flowing into a cabin, and the safety of a ship is improved. The device is simple in composition, high in operability and recoverability and convenient to install and maintain.

Description

Technical Field

[0001] The utility model relates to the technical field of ship bubble drag reduction, in particular to a bubble breaking nozzle used for ship drag reduction. Background Art

[0002] With the rapid development of the global shipping industry, the issue of ship energy consumption and emissions has become an increasingly important research topic. When ships navigate the water, they consume significant amounts of energy due to the viscosity and fluid resistance of the water. This not only increases operating costs but also leads to increased greenhouse gas emissions. Drag reduction technology, as an important means of improving ship fuel efficiency and reducing emissions, has received widespread attention in recent years. Bubble drag reduction technology is an advanced method that uses air to form a bubble layer on the bottom of a ship to reduce frictional resistance between the hull and the water. This technology releases tiny bubbles from the bottom of the ship to reduce the friction coefficient between the hull and the water, thereby effectively reducing drag, increasing speed, and reducing energy consumption.

[0003] Traditional ship bubble drag reduction technology suffers from low exhaust efficiency, making it difficult for bubbles to be evenly distributed across the hull bottom. This can easily lead to insufficient injection pressure for the air-water mixture, weakening the bubble drag reduction effect. Therefore, there is an urgent need for a drag reduction device with better drag reduction, convenient recovery and release, and greater applicability. To this end, a bubble-breaking nozzle for ship drag reduction is provided. Utility Model Content

[0004] The purpose of the utility model is to provide a bubble breaking nozzle for ship drag reduction in view of the defects of the prior art, so as to solve the problems raised by the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a bubble-breaking nozzle for ship drag reduction, comprising a bubble-breaking nozzle, the bubble-breaking nozzle being composed of a hydraulic motor, a rotating shaft and a plurality of triangular blocks, the hydraulic motor being connected to the rotating shaft, the rotating shaft being passed through by a plurality of triangular blocks, the plurality of triangular blocks being fixed on the rotating shaft, the hydraulic motor being mounted on one end of the bottom of a storage box, the bottom of the storage box being provided with a groove for storing the triangular blocks, the storage box being mounted on the bottom of the ship, the top of the storage box being provided with a plurality of circular spray holes, the circular spray holes being connected to expansion tubes, the top of the expansion tube being connected to a connecting tube, the connecting tube and the expansion tube constituting a Laval tube.

[0006] As a preferred technical solution of the present invention, the main shaft of the hydraulic motor is connected to the rotating shaft via a coupling, and the triangular blocks are mounted on the rotating shaft via bolts.

[0007] As a preferred technical solution of the present invention, the triangular block is an equilateral triangle, and the depth and width of the groove at the bottom of the storage box are equal to the height of the equilateral triangle.

[0008] As a preferred technical solution of the present invention, the diameter of the connecting tube is smaller than the diameter of the expansion tube.

[0009] As a preferred technical solution of the present invention, the hydraulic motor is connected to the hydraulic oil pump through a hydraulic oil pipe.

[0010] As a preferred technical solution of the present invention, the expansion tube is fixedly connected to the top of the storage box by a sealing gasket and bolts, and the center of the expansion tube and the circular spray hole are on the same straight line.

[0011] Compared with the existing technology, the beneficial effects of the present invention are as follows: the bubble crushing nozzle adopts a hydraulic motor to drive a plurality of triangular blocks on the rotating shaft to unfold from the storage box, so that the gas entering the storage box is broken up by a plurality of triangular blocks to form small bubbles, which are attached to the bottom of the ship to form a drag reduction effect, so that the bubbles are evenly distributed on the bottom of the ship.

[0012] The air intake pipe is composed of Laval tube to prevent water from flowing into the cabin and improve the air bubble drag reduction effect. The device has simple composition, strong operability and recyclability, low cost and easy installation and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural diagram of the utility model;

[0014] Figure 2 It is a schematic diagram of the three-dimensional structure of the utility model.

[0015] In the figure: 1. triangular block; 2. rotating shaft; 3. hydraulic motor; 4. circular spray hole; 5. Laval tube; 6. storage box; 7. expansion tube; 9. connecting tube. DETAILED DESCRIPTION

[0016] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more precise definition of the protection scope of the present invention.

[0017] Example: See Figure 1-2The utility model provides a technical solution: a bubble crushing nozzle for ship drag reduction, including a bubble crushing nozzle, which is composed of a hydraulic motor 3, a rotating shaft 2 and a plurality of triangular blocks 1. The hydraulic motor 3 is connected to the rotating shaft 2, and the rotating shaft 2 is penetrated by a plurality of triangular blocks 1. The plurality of triangular blocks 1 are fixed on the rotating shaft 2. The hydraulic motor 3 is installed on one end of the bottom of the storage box 6. The bottom of the storage box 6 is provided with a groove for storing the triangular blocks 1. The storage box 6 is installed on the bottom of the ship. The top of the storage box 6 is provided with a plurality of circular spray holes 4. The circular spray holes 4 are connected to the expansion tubes 7. The top of the expansion tube 7 is connected to the connecting tube 9. The connecting tube 9 and the expansion tube 7 constitute a Laval tube 5.

[0018] The internal and external pressures before jetting satisfy the following formula:

[0019] P5=P out

[0020] Where: P5 represents the internal pressure of Laval tube 5, P out Indicates the external pressure of the circular nozzle hole 4.

[0021] When the ship uses jet to reduce drag, the jet system pressure should meet the following requirements:

[0022] P5>P4>P out

[0023] Where: p5 represents the Laval tube pressure, P4 represents the fumarole pressure, P out Indicates external water pressure.

[0024] The main shaft of the hydraulic motor 3 is connected to the rotating shaft 2 through a coupling, and the triangular blocks 1 are mounted on the rotating shaft 2 through bolts.

[0025] The triangular block 1 is an equilateral triangle, and the depth and width of the groove at the bottom of the storage box 6 are equal to the height of the equilateral triangle, so that the triangular block 1 can be easily stored in the groove.

[0026] The diameter of the connecting pipe 9 is smaller than that of the expansion pipe 7 and is used to prevent water from flowing into the cabin.

[0027] The hydraulic motor 3 is connected to the hydraulic oil pump through a hydraulic oil pipe, and the hydraulic oil pump sucks oil to realize the forward and reverse rotation of the hydraulic motor 3.

[0028] The expansion tube 7 is fixedly connected to the top of the storage box 6 by a sealing gasket and bolts, and the center of the expansion tube 7 and the circular spray hole 4 are on the same straight line.

[0029] Working principle: a kind of bubble breaking spray head for ship drag reduction, when ship starts drag reduction, hydraulic motor 3 drives rotating shaft 2 to rotate and open triangular block 1, let the side of high vertical groove of triangular block 1, air is introduced into circular spray hole 4 by Laval pipe 5, at this time air will accumulate in groove 6, under the action of water flow, the gas in groove 6 is scattered by triangular block 1, form fine bubbles, adhere to the bottom of ship to form drag reduction effect, when ship completes drag reduction effect, using hydraulic motor 3 drives rotating shaft 2 to reverse rotation, and recycles triangular block 1 to the inner wall of groove 6.

[0030] The above embodiments only express the implementation of the present application, and the description is more specific and detailed, but it cannot be understood as the limitation of the scope of the utility model patent. It should be pointed out that for ordinary skilled person in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which belong to the protection scope of the present application.

Claims

1. A bubble breaking nozzle for ship drag reduction, comprising a bubble breaking nozzle, characterized in that: The bubble crushing nozzle is composed of a hydraulic motor (3), a rotating shaft (2) and a plurality of triangular blocks (1); the hydraulic motor (3) is connected to the rotating shaft (2); the rotating shaft (2) is provided with a plurality of triangular blocks (1); the plurality of triangular blocks (1) are fixed on the rotating shaft (2); the hydraulic motor (3) is installed on one end of the bottom of a storage box (6); the bottom of the storage box (6) is provided with a groove for storing the triangular blocks (1); the storage box (6) is installed on the bottom of a ship; the top of the storage box (6) is provided with a plurality of circular spray holes (4); the circular spray holes (4) are connected to an expansion tube (7); the top of the expansion tube (7) is connected to a connecting tube (9); the connecting tube (9) and the expansion tube (7) constitute a Laval tube (5).

2. The bubble breaking nozzle for ship drag reduction according to claim 1, characterized in that: The main shaft of the hydraulic motor (3) is connected to the rotating shaft (2) via a coupling, and the triangular blocks (1) are mounted on the rotating shaft (2) via bolts.

3. The bubble breaking nozzle for ship drag reduction according to claim 1, characterized in that: The triangular block (1) is an equilateral triangle, and the depth and width of the groove at the bottom of the storage box (6) are equal to the height of the equilateral triangle.

4. The bubble breaking nozzle for ship drag reduction according to claim 1, characterized in that: The diameter of the connecting tube (9) is smaller than the diameter of the expansion tube (7).

5. The bubble breaking nozzle for ship drag reduction according to claim 1, characterized in that: The hydraulic motor (3) is connected to the hydraulic oil pump via a hydraulic oil pipe.

6. The bubble breaking nozzle for ship drag reduction according to claim 1, characterized in that: The expansion tube (7) is fixedly connected to the top of the storage box (6) via a sealing gasket and bolts, and the center of the expansion tube (7) and the circular spray hole (4) are on the same straight line.

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