JPH11348870A - Air supplying device for micro bubble device from supercharger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for supplying air to a micro bubble device by branching pressurized air generated in the supercharger of a main engine. SOLUTION: A branch line 17 is installed on a pressurized air line 16 supplying pressurized air to a main engine 11 from the blower 14 and a supercharger 12 installed on the main engine 11, and supplies pressurized air to a micro bubble device for decreasing hull resistance by delivering bubbles from a hull through the branch line 17.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air supply device for supplying pressurized air from a supercharger to a microbubble device which discharges bubbles from a ship bottom to reduce hull resistance.

[0002]

2. Description of the Related Art A micro-bubble device is a device that blows out fine bubbles from the bottom of a ship to reduce frictional resistance generated between the ship and water when the hull is propelled. FIG. 2 is a diagram illustrating an example of the microbubble device.
(A) is a plan view of the hull, (B) is XX of (A).
FIG. 4C is a cross-sectional view, FIG. 4C is a YZ cross-sectional view of FIG. 4A, and FIG.

[0003] A plurality of predetermined positions of the hull 1 (see FIG. 2)
(In three places), an air chamber 2 is provided. Air chamber 2
3 is a box surrounding the ship bottom as shown in FIG. 3. The ship bottom is constituted by a perforated plate 3 and supplies pressurized air to the air chamber 2 to discharge air from the perforated plate 3 to form fine bubbles along the hull surface. Raised
The frictional resistance between the water and the hull 1 is reduced. An outboard valve 4 is provided in the air chamber 2, and pressurized air is supplied from the valve 4.

Pressurized air is supplied from a blower 5 for each air chamber 2 (referred to as an air chamber group) at the same position on the hull 1. A pressure adjusting valve 7 and a check valve 8 are provided in an air pipe 6 from the blower 5, and are connected to the outboard valves 4 of the respective air chambers 2. A pressure gauge 9 is provided for each air chamber group.
Adjusts the pressure of air supplied to each air chamber group by the pressure adjusting valve 7 based on the measurement value of the pressure gauge 9. The blower 5 is driven by an electric motor. In some cases, an air compressor is used instead of the blower 5.

[0005]

When the blower is driven by an electric motor or when compressed air is supplied by an air compressor, the driving energy is large, and the effect of reducing the energy for propelling the hull by the microvalve is considerably impaired. I was In addition, when adding a microbubble device to an existing ship, it was necessary to add an air compressor and a blower, and it was often difficult to secure a space for installing these devices.
In addition, when the motor is driven by a motor, the capacity of the generator may become insufficient, and it may be necessary to add a generator or replace the current generator with a large-capacity generator.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a device for branching pressurized air generated by a supercharger of a main engine and supplying the branched air to a microbubble device.

[0007]

According to the first aspect of the present invention, a branch line is provided in a pressurized air line for supplying pressurized air to a main unit from a blower of a supercharger provided in the main unit. Pressurized air is supplied to a microbubble device that discharges bubbles from the hull from this branch line to reduce the hull resistance.

When the main engine is a diesel engine, a supercharger is used in which a turbine is rotated by exhaust gas of the main engine, thereby driving a blower to generate pressurized air and send the compressed air to the main engine. A branch line is provided in a pressurized air line for supplying pressurized air from the blower of the supercharger to the main unit, and the pressurized air can be supplied to the microbubble device from the branch line. Since part of the exhaust gas energy of the main engine is recovered and used as power, there is no need to provide a special power source for the microbubble device, which is economically excellent.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram illustrating a configuration of an air supply device from a supercharger according to an embodiment. Reference numeral 11 denotes a main engine diesel engine, and 12 denotes exhaust gas of the main engine, which is a turbocharger turbine 1
3 and the supercharger blower 1 is driven by the supercharger turbine 13.
4 to drive the supercharger. Exhaust gas from the main engine 11 is supplied to the supercharger turbine 13 from the main engine exhaust gas line 15. The supercharger blower 1 is provided by the supercharger turbine 13.
4 is driven to pressurize air, and pressurized air is supplied to the main engine by a pressurized air line 16. A branch line 17 is provided in the pressurized air line 16, and the branched pressurized air is adjusted by a flow control valve 18 and supplied to the microbubble device shown in FIG. The pressurized air line 16 includes a supercharger blower 14
An air cooler 19 is provided at the outlet of the supercharger blower 14.
To cool the air heated to 120 to 140 ° C. to about 40 ° C. suitable for the main engine 11 Since the branch line 17 is provided downstream of the air cooler 19, cooled air is supplied. Although the temperature of the air is not related to the performance of the microbubbles, the diameter of the air pipe 6 to the air chamber 2 can be reduced.

In order to supply pressurized air to the microbubble device, it is necessary to increase the output of the supercharger 12. The capacity of the supercharger 12 is determined by the output of the main engine 11,
If the output of the turbocharger 1 increases and the amount of exhaust gas increases, the output of the turbocharger turbine 13 increases and the amount of pressurized air of the supercharger blower 14 also increases. However, by supplying pressurized air to the microbubble device, the hull resistance is reduced and the output of the main engine 11 is reduced, so that the pressurized air from the supercharger 12 is no longer required. May be sent to the microbubble device. Thus, no special power is required to send pressurized air to the microbubble device.

[0011]

As apparent from the above description, the present invention has the following effects. Since a dedicated blower or an air compressor is not required and the output of the supercharger of the main engine can be increased, the cost is almost nil and the installation space for these is unnecessary. This is an energy-saving system that collects a part of the exhaust gas energy of the main engine and uses it as power, and can maximize the exhaust energy of the main engine. Accordingly, it is not necessary to provide a power unit for obtaining air of microbubbles. If the output of the turbocharger is increased for microbubbles,
As the speed of the ship becomes slower, the effect of the microbubbles is not so expected, so the air consumption is reduced. If excess air is used for combustion, combustion improvement can be expected, and incombustibles in the exhaust are reduced, which is also environmentally effective. Since no special air supply device is required, retrofitting the microbubble device to an existing ship can be easily and inexpensively performed. Pressurized air can be obtained according to the load of the main engine. In other words, microbubbles require a lot of air at high speeds, and high-speed navigation requires high propulsion horsepower and a large amount of exhaust gas. In this regard, the present system can appropriately respond to the demand for microbubbles.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of an embodiment of the present invention.

FIG. 2 is a diagram illustrating a configuration example of a microbubble device.

FIG. 3 is a diagram showing a configuration of an air chamber.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hull 2 Air chamber 3 Perforated plate 4 Outboard valve 5 Blower 6 Air piping 7 Pressure control valve 8 Check valve 9 Pressure gauge 10 Control device 11 Main engine 12 Supercharger 13 Turbocharger turbine 14 Turbocharger blower 15 Main engine exhaust Gas line 16 Pressurized air line 17 Branch line 18 Flow control valve

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hideki Shuto 2-1-1 Toyosu, Koto-ku, Tokyo Ishikawajima-Harima Heavy Industries Co., Ltd. Tokyo 1st Factory (72) Inventor Shunsuke Ota 2-1-1 Toyosu, Koto-ku, Tokyo No. 1 Ishikawajima Harima Heavy Industries Co., Ltd. Tokyo 1st factory

Claims (1)

[Claims] 1. A branch line is provided in a pressurized air line for supplying pressurized air to a main engine from a blower of a supercharger provided in the main engine, and bubbles are discharged from the hull from this branch line to reduce hull resistance. An air supply device from a supercharger to a microbubble device, which supplies pressurized air to the microbubble device.