Air lubrication system utilizing vacuum pump to convey air

Abstract

An air lubrication system utilizing a vacuum pump to convey air is characterized in that the vacuum pump is provided with a working water inlet and an air suction port, a vacuum pump working water power source is connected with the vacuum pump working water inlet through a water inlet pipeline to convey working water into the vacuum pump, and the water inlet pipeline is provided with a working water inlet stop valve; the vacuum pump air inlet device is connected with a vacuum pump air suction port through an air inlet pipeline, and a vacuum pump air suction check valve is arranged on the air inlet pipeline to feed air into the vacuum pump. The vacuum pump is connected with a discharge pipeline, a vacuum pump outlet check valve is arranged on the discharge pipeline, a vacuum pump discharge port is formed in the end portion of the discharge pipeline, and the vacuum pump discharge port faces the stern at the bottom of the ship body to discharge water and gas mixtures. In order to solve the problem of high initial investment of a ship owner, the ship raw water fire extinguishing system is used as a power source of working water of the vacuum pump, main functional equipment is the vacuum pump, and the vacuum pump is low in cost and can provide tiny thrust for advancing of the ship.

Description

Technical Field

[0001] The invention belongs to the field of marine ship design and construction, and in particular relates to an air lubrication system that utilizes a vacuum pump to transport air. Background Art

[0002] As international conventions have increasingly stringent requirements on carbon emissions from ships, the shipping industry, as a major carbon emitter, is actively promoting energy-saving and emission reduction measures. In recent years, more and more shipowners have requested the use of air lubrication systems. In addition, the International Maritime Organization has included the bubble lubrication drag reduction system in the ship design energy efficiency indicators. The principle of the currently commonly used air lubrication drag reduction system is to use an air compressor to discharge pressurized air from the outer shell of the bottom of the ship, so that a layer of bubbles is formed outside the bottom of the ship to reduce the wet surface area of ​​the ship. Since the air resistance is much smaller than the water resistance, the larger the area of ​​air contacting the bottom of the ship, the smaller the ship's driving resistance. Therefore, this can reduce the resistance of the ship during navigation, thereby improving propulsion efficiency. However, this principle method leads to higher initial investment for shipowners and higher maintenance costs in the later stage, and does not fully utilize the resources of the original system of the ship. Therefore, in response to the above problems, an air lubrication system that uses a vacuum pump to transport air is proposed. Summary of the invention

[0003] In order to solve the above problems, the present invention provides an air lubrication system using a vacuum pump to transport air, aiming to achieve the purpose of low initial investment cost, utilizing the original resources of the ship, being able to generate partial thrust, and reliable device. The technical solution adopted is: An air lubrication system that uses a vacuum pump to transport air. The vacuum pump has a working water inlet and an air suction port. The working water power source of the vacuum pump is connected to the working water inlet of the vacuum pump through a water inlet pipeline to deliver working water into the vacuum pump. A working water inlet stop valve is provided on the water inlet pipeline.

[0004] The vacuum pump air intake device is connected to the vacuum pump suction port through an air intake pipeline. A vacuum pump suction check valve is arranged on the air intake pipeline to send air into the vacuum pump.

[0005] The vacuum pump is connected to a discharge pipeline, a vacuum pump outlet check valve is arranged on the discharge pipeline, a vacuum pump discharge port is arranged at the end of the discharge pipeline, and the vacuum pump discharge port is at the bottom of the hull toward the stern to discharge the water-gas mixture.

[0006] The above-mentioned air lubrication system using a vacuum pump to transport air, further, the air intake device uses the air in the cabin as an air source.

[0007] The above-mentioned air lubrication system using a vacuum pump to transport air, further, the working water power source is a ship water fire extinguishing system.

[0008] The above-mentioned air lubrication system using a vacuum pump to transport air further has a discharge pipeline welded to the outer plate at the bottom of the hull.

[0009] In order to reduce the problem of high initial investment of ship owners, the present invention utilizes the ship raw water fire extinguishing system as the power source of the working water of the vacuum pump. The main functional equipment is the vacuum pump, and the cost of the vacuum pump is relatively low.

[0010] Since the outlet pipe of the vacuum pump drainage device discharges the seawater and gas mixture toward the stern of the ship, it can provide a small thrust for the ship to move forward. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the system of the present invention; Figure 2 It is a schematic diagram of the arrangement of the present invention on a ship; Among them, 1-vacuum pump, 2-working water inlet stop valve, 3-vacuum pump suction check valve, 4-vacuum pump outlet check valve, 5-hull bottom outer plate, 7-working water inlet, 8-vacuum pump discharge outlet, 9-air intake, 10-water inlet pipeline, 11-discharge pipeline, 12-air inlet pipeline. DETAILED DESCRIPTION

[0012] The present invention will be further described in conjunction with the accompanying drawings.

[0013] An air lubrication system that uses a vacuum pump to deliver air, such as Figure 1 As shown, it includes a vacuum pump working water power source, a vacuum pump air intake device, and a vacuum pump drainage device. The vacuum pump working water power source uses the conventional water fire extinguishing system of the ship as the power source of the working water; the water fire extinguishing system is a system originally designed for fire fighting purposes on the ship; the vacuum pump working water power source is connected to the vacuum pump working water inlet through an inlet pipeline, and a working water inlet stop valve 2 is installed on the inlet pipeline to control the opening and closing of the working water; the working water is connected to the working water inlet stop valve through the inlet pipeline 10, and finally connected to the vacuum pump working water inlet 7.

[0014] The vacuum pump air intake device is a device connected to the vacuum pump suction port 9; the vacuum pump air intake device uses the air in the cabin as the air source; the vacuum pump suction port is connected to the vacuum pump air intake device through an intake pipeline, and a vacuum pump suction check valve 3 is installed on the intake pipeline to only allow air to be inhaled.

[0015] The vacuum pump drainage device is a drainage device after a large amount of air has been sucked in. The vacuum pump is connected to the discharge pipeline. A vacuum pump outlet check valve is provided on the discharge pipeline. The end of the discharge pipeline is provided with a vacuum pump discharge port, which only allows the water-gas mixture to be discharged. The vacuum pump discharge port is at the bottom of the hull toward the stern to discharge the water-gas mixture.

[0016] An air lubrication system using a vacuum pump to deliver air comprises the following steps: Step 1: Ensure that the water fire extinguishing system is in use and that the system pipelines are able to provide a stable supply of seawater.

[0017] Step 2: Ensure that the vacuum pump working water power source, vacuum pump air intake device, and vacuum pump drainage device are installed and the tightness test has been completed.

[0018] Step three, open the shut-off valve for the working water inlet of the vacuum pump. At this time, the seawater in the water fire extinguishing system enters the vacuum pump through the water inlet pipe and the shut-off valve 2 for the working water of the vacuum pump, and serves as the working water power source of the vacuum pump. The air in the cabin enters the vacuum pump through the vacuum pump suction check valve and the vacuum pump intake pipe. After the air in the cabin is mixed with the seawater, it passes through the vacuum pump discharge pipe and the vacuum pump outlet check valve, and is discharged to the stern through the vacuum pump discharge port, covering the bottom of the ship with an air layer with bubbles.

[0019] Compared with the prior art, the present invention provides an air lubrication system using an ejector to deliver air, which has the following beneficial effects.

[0020] In the present invention, in order to reduce the problem of high initial investment of the shipowner, the ship's raw water fire extinguishing system is used as the power source of the ejector working water, and the main functional equipment is the ejector, which has a low cost.

[0021] like Figure 2 As shown, the present invention is arranged at the lower part of the ship. Since the outlet pipeline of the ejector drainage device discharges the seawater and gas mixture toward the stern of the ship, a slight thrust can be provided to the forward movement of the ship.

Claims

1. An air lubrication system using a vacuum pump to deliver air, characterized in that: The vacuum pump is provided with a working water inlet and an air suction port. The working water power source of the vacuum pump is connected to the working water inlet of the vacuum pump through a water inlet pipeline to deliver the working water into the vacuum pump. A working water inlet stop valve is provided on the water inlet pipeline. The vacuum pump air intake device is connected to the vacuum pump air intake port through an air intake pipeline. A vacuum pump air intake check valve is provided on the air intake pipeline to send air into the vacuum pump; The vacuum pump is connected to a discharge pipeline, a vacuum pump outlet check valve is arranged on the discharge pipeline, a vacuum pump discharge port is arranged at the end of the discharge pipeline, and the vacuum pump discharge port is at the bottom of the hull toward the stern to discharge the water-gas mixture.

2. The air lubrication system using a vacuum pump to transport air according to claim 1, characterized in that: The air intake device uses cabin air as its air source.

3. The air lubrication system using a vacuum pump to transport air according to claim 1, characterized in that: The working water power source is the ship's water fire extinguishing system.

4. The air lubrication system using a vacuum pump to transport air according to claim 1, characterized in that: The discharge pipe is welded to the bottom outer plating of the hull.

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