CN107406124A

CN107406124A - The frictional resistance of air lubrication formula ship reduces device, ship

Info

Publication number: CN107406124A
Application number: CN201580078285.3A
Authority: CN
Inventors: 高野真; 高野真一; 川北千春; 村田聪; 佐藤慎辅
Original assignee: Mitsubishi Heavy Industries Ltd
Current assignee: Mitsubishi Heavy Industries Ltd
Priority date: 2015-03-31
Filing date: 2015-12-10
Publication date: 2017-11-28
Anticipated expiration: 2035-12-10
Also published as: WO2016157633A1; KR102139045B1; JP2016193642A; JP6484902B2; CN107406124B; KR20170132727A

Abstract

Possess to the frictional resistance reduction device (20E) that air is sprayed around hull (11) to reduce the air lubrication formula ship (10) of caused frictional resistance between water of the hull (11) with around：Injector body (31), with the stream (31r) for pressure-air (AH) flowing from pressure-air supply source (14) supply, and the low-pressure air (AL) that pressure is less than pressure-air (AH) is introduced into stream (31r)；And bubble blowing unit (21), sprayed by the pressure-air (AH) and low-pressure air (AL) that will be discharged from injector body (31), and bubble is produced around hull (11).

Description

The frictional resistance of air lubrication formula ship reduces device, ship

Technical field

The present invention relates to the frictional resistance of air lubrication formula ship to reduce device, ship.

The application on March 31st, 2015 to the Japanese Patent Application 2015-73479 that Japan files an application based on advocating excellent First weigh, and its content is incorporated herein.

Background technology

Ship under sail, can be submerged caused frictional resistance between the part in water and water by hull.The friction Resistance turns into loss for the propulsive force of hull, therefore hinders carrying for as caused by being cut down consumption fuel energy-saving effect High, CO₂Discharge rate is cut down.

Therefore, it is proposed to make to flow along hull surface by the bubble for spraying air from the peripherad water of hull to generate It is dynamic, so as to reduce the technology of the caused frictional resistance between water.

Bubble can for example be generated by air blower.The air blower is favourable in terms of consumed energy is small, is generally used for low Press the purposes of big flow.

On the other hand, in deeper ship is absorbed water, larger drinking water pressure acts on the ejiction opening of bubble.In the situation Under, in order to which air is fed through into hull bottom and sprayed into water, need to improve the pressure of air compared with the situation of shallower draft.So And it can not fully obtain the ejection pressure of air sometimes by air blower.Such as, it is also considered that use can boost into more high pressure The source of high pressure air such as compressor method, but consumed energy becomes big.Therefore, in the case where absorbing water relatively depth, by making to rub The consumed energy and the difference of the consumed energy in order to be sent into needed for air wiped drag reduction and reduced tail off, and energy-saving effect diminishes.

Patent document 1 discloses by by a part for the forced air after the booster pressurization from engine to air blower Supply to improve the structure of the pressure for the air being sent into hull bottom.According to such structure, in the case of relatively depth is absorbed water, Also the increase of consumed energy can be suppressed and air is fed through hull bottom and sprayed into water, as a result, can suppress to save The reduction of effect.

Patent document 1：Japanese Unexamined Patent Publication 2013-91376 publications

The content of the invention

The invention problem to be solved

The technology that patent document 1 is recorded in order to the output according to engine and drinking water pressure adjusting the pressure of forced air and Structure with complexity.

In addition, relatively low situation etc. is exported in engine can not fully obtain the stream of the forced air from booster supply In the case of amount, the output of the source of high pressure air such as increase or the compressor of the output of engine is needed to reduce frictional resistance Increase, so as to energy expenditure increase.Accordingly, it is possible to it cannot get sufficient energy-saving effect, CO₂Discharge rate cuts down effect.

Present invention aims at providing a kind of increase that can suppress parts count and ensuring required air mass flow, obtain Sufficient energy-saving effect, CO₂The frictional resistance that discharge rate cuts down the air lubrication formula ship of effect reduces device, ship.

For solving the scheme of problem

According to the first form of the present invention, the frictional resistance of air lubrication formula ship, which reduces device, to be sprayed to around hull Air come reduce above-mentioned hull and around water between caused frictional resistance air lubrication formula ship frictional resistance drop Low device, the frictional resistance reduce device and possess injector, and above-mentioned injector has for the height from the supply of pressure-air supply source The stream of air flow is pressed, and the low-pressure air that pressure is less than above-mentioned pressure-air is introduced into above-mentioned stream.Frictional resistance drops Low device is also equipped with bubble blowing unit, above-mentioned bubble blowing unit by above-mentioned pressure-air that will be discharged from above-mentioned injector and on Low-pressure air ejection is stated, and bubble is produced around above-mentioned hull.

So, by supplying pressure-air and low-pressure air from injector to bubble blowing unit, and air stream can be increased Amount.Moreover, in the case where not increasing air mass flow, it can also suppress the equipment class for generating pressure-air or low-pressure air Required energy.

According to the second form of the present invention, it is base in the form of first that the frictional resistance of air lubrication formula ship, which reduces device, Plinth or, above-mentioned stream is from upstream side towards downstream and flow path cross sectional area is gradually reduced.

By so forming, in the stream of injector, pressure-air raises towards downstream and flow velocity, thus in stream Interior generation negative pressure.By the negative pressure, low-pressure air can be introduced into the stream of injector, therefore need not be low in order to introduce Press air and increase the special power source of air mass flow.

According to the 3rd form of the present invention, the frictional resistance of air lubrication formula ship reduces device in the form of first or second Based on or, be the main frame for promoting above-mentioned hull or the subsidiary engine supplied to above-mentioned main frame.

So, it is empty as high pressure by using the exhaust from main frame or from the compressed air of the subsidiary engines such as booster discharge Gas, it is not necessary to compressor etc. is set in addition in order to generate pressure-air, cost degradation can be realized.

According to the 4th form of the present invention, the frictional resistance of air lubrication formula ship reduces device in the form of first or second Based on or, above-mentioned pressure-air supply source is the compressor being compressed to air.

By so forming, pressure-air easily can be obtained from air.

According to the 5th form of the present invention, the frictional resistance of air lubrication formula ship reduces device in the form of first to fourth In based on any form or, be also equipped with the bubble recovery for the above-mentioned bubble that recovery sprays from above-mentioned bubble blowing unit Portion, after above-mentioned low-pressure air is the above-mentioned bubble reclaimed by above-mentioned bubble recoverer and is taken into from air and is compressed by air blower Air.

So, make by the low-pressure air for the bubble that will be reclaimed from bubble recoverer and by the air of air blower compression Used for low-pressure air, low-pressure air can be readily insured that and increase the flow of low-pressure air i.e. to the supply of bubble blowing unit Air mass flow.

In addition, reclaiming low-pressure air by using bubble recoverer, and the spiral shell in the quarter setting of hull can be reduced Rotation oar is involved in the situation of bubble, therefore can suppress the generation of vibration or the decline of propulsive efficiency.

According to the 6th form of the present invention, the frictional resistance of air lubrication formula ship reduces device in the form of first to fourth In based on any form or, be also equipped with the bubble recovery for the above-mentioned bubble that recovery sprays from above-mentioned bubble blowing unit Portion, above-mentioned low-pressure air obtain from the above-mentioned bubble reclaimed by above-mentioned bubble recoverer.

So, by obtaining low-pressure air from the bubble reclaimed by bubble recoverer, can suppress to be used to generate low pressure sky The equipment cost of gas.

In addition, reclaiming low-pressure air by using bubble recoverer, the spiral in the quarter setting of hull can be reduced Oar is involved in the situation of bubble, therefore can suppress the generation of vibration or the decline of propulsive efficiency.

According to the 7th form of the present invention, the frictional resistance of air lubrication formula ship reduces device in the form of first to fourth In based on any form or, above-mentioned low-pressure air is the air being taken into from air.

By so forming, the low-pressure air for increasing air mass flow can be readily insured that.

According to the 8th form of the present invention, the frictional resistance of air lubrication formula ship reduces device in the form of first to fourth In based on any form or, above-mentioned low-pressure air is that the air being taken into from air is pressed by air blower Air after contracting.

By so forming, low-pressure air can be readily insured that, and increases the flow of low-pressure air, i.e., is sprayed to bubble The air mass flow of portion's supply.

According to the 9th form of the present invention, it is base in the form of the 4th that the frictional resistance of air lubrication formula ship, which reduces device, Plinth or, possess the booster for being compressed to combustion air and being supplied to the main frame for promoting above-mentioned hull, it is above-mentioned Low-pressure air is by the air after above-mentioned compressed.

So, by using the compressed air sprayed from booster as low-pressure air, it is not necessary in order to generate low pressure sky Gas and be provided additionally with equipment, cost degradation can be realized.In this case, pressure-air such as can by compressor with than The mode for turning into high pressure from the low-pressure air of booster supply supplies.

According to the tenth form of the present invention, the frictional resistance of air lubrication formula ship reduces device in the form of first to the 9th In based on any form or, be also equipped with being compressed the air being taken into from air and to above-mentioned bubble blowing unit The air boosting section of supply, the frictional resistance of above-mentioned air lubrication formula ship, which reduces device, alternatively to be boosted from above-mentioned air At least one party in portion and above-mentioned injector supplies air to above-mentioned bubble blowing unit.

, can be by the air after being boosted by air boosting section to gas in the case of shallower draft by so forming Steep blowing unit supply, in the case where absorbing water relatively depth, can from injector by pressure-air and low-pressure air to bubble blowing unit Supply.Thereby, it is possible to suppress energy expenditure and appropriate air is supplied to bubble blowing unit according to the depth of drinking water.

According to the 11st form of the present invention, the frictional resistance of air lubrication formula ship reduces device with the first to the tenth shape In state based on any form or, be also equipped with temporarily accumulating above-mentioned pressure-air in the upstream side of above-mentioned injector Gasing tank.

By so forming, it is empty such as caused by booster or compressor that the equipment in generation pressure-air can be suppressed The pulsation of the flowing of gas.Thereby, it is possible to make pressure-air interflow of the low-pressure air swimmingly with being flowed in injector.Moreover, By suppressing to pulse, bubble can be stably produced from bubble blowing unit.

According to the 12nd form of the present invention, ship possesses the air lubrication formula of any form in the first to the 11st form The frictional resistance of ship reduces device.

By so forming, energy-saving, CO can be realized₂The reduction of discharge rate simultaneously improves propulsive force.

Invention effect

Device, ship are reduced according to the frictional resistance of the air lubrication formula ship of the present invention, it is possible to increase energy-saving effect, CO₂Discharge rate cuts down effect.

Brief description of the drawings

Fig. 1 is that the frictional resistance for the air lubrication formula ship for representing the first embodiment of the present invention reduces device, ship Integrally-built schematic diagram.

Fig. 2 is that the frictional resistance for the air lubrication formula ship for representing second embodiment of the present invention reduces device, ship Integrally-built schematic diagram.

Fig. 3 is that the frictional resistance for the air lubrication formula ship for representing third embodiment of the present invention reduces device, ship Integrally-built schematic diagram.

Fig. 4 is that the frictional resistance for the air lubrication formula ship for representing the 4th embodiment of the present invention reduces device, ship Integrally-built schematic diagram.

Fig. 5 is that the frictional resistance for the air lubrication formula ship for representing the 5th embodiment of the present invention reduces device, ship Integrally-built schematic diagram.

Fig. 6 is that the frictional resistance for the air lubrication formula ship for representing the 6th embodiment of the present invention reduces device, ship Integrally-built schematic diagram.

Fig. 7 is that the frictional resistance for the air lubrication formula ship for representing the 7th embodiment of the present invention reduces device, ship Integrally-built schematic diagram.

Fig. 8 is that the frictional resistance for the air lubrication formula ship for representing the 8th embodiment of the present invention reduces device, ship Integrally-built schematic diagram.

Fig. 9 is that the frictional resistance for the air lubrication formula ship for representing the 9th embodiment of the present invention reduces device, ship Integrally-built schematic diagram.

Figure 10 is that the frictional resistance for the air lubrication formula ship for representing the tenth embodiment of the present invention reduces device, ship Integrally-built schematic diagram.

Figure 11 is that the frictional resistance for the air lubrication formula ship for representing the 11st embodiment of the present invention reduces device, ship The integrally-built schematic diagram of oceangoing ship.

Figure 12 is that the frictional resistance for the air lubrication formula ship for representing the 12nd embodiment of the present invention reduces device, ship The integrally-built schematic diagram of oceangoing ship.

Embodiment

Hereinafter, based on accompanying drawing, device, ship are reduced to the frictional resistance of the air lubrication formula ship of embodiments of the present invention Oceangoing ship illustrates.

(first embodiment)

Fig. 1 is that the frictional resistance for the air lubrication formula ship for representing present embodiment reduces device, the overall structure of ship Schematic diagram.

As shown in figure 1, the ship (air lubrication formula ship) 10 of present embodiment it is main possess hull 11, propeller 12, Main frame 13, booster 14, frictional resistance reduce device 20A.

Propeller 12 is rearward provided projectingly from the bottom of the quarter 11r sides of hull 11.The propeller 12 possesses rotation Axle 12s, rotary shaft 12s are connected with the main frame 13 being arranged in hull 11.

Main frame 13 is burnt the blender that fuel mixes with air to produce driving force, to drive propeller by making 12 rotary shaft 12s rotations.

Booster 14 is taken into air from outside and is compressed, at least using one part as high pressure combustion air to Main frame 13 is sent into.

Frictional resistance reduces device 20A and possesses bubble blowing unit 21, air supply unit 30A.

Bubble blowing unit 21 is arranged on the hull bottom 11b of the bow portion 11f sides of hull 11.Bubble blowing unit 21 supplies via air It is connected to pipe 22 with air supply unit 30A described later.Bubble blowing unit 21 will be from air supply unit 30A by being arranged on hull The air that air supply pipe 22 in 11 supplies from hull bottom 11b to hull 11 around water in spray.By from bubble blowing unit 21 air sprayed, and alow generate bubble in the water around 11b.Bubble is along with the propulsion of ship 10 and relative to hull 11 are relatively moved.More specifically, quarter 11r side of the bubble of generation from bubble blowing unit 21 towards ship cephalocaudal direction Moved along hull bottom 11b.

Air supply unit 30A possesses injector body 31.The injector body 31 has from first end 31a inside it Towards the stream 31r of the taper of the second end 31b undergauges.Pressure-air is connected with the first end 31a of injector body 31 Supplying tubing 35, air supply pipe 22 is connected with the second end 31b of injector body 31.

Suction inlet 32 is connected with the circumferential lateral surface of injector body 31.More specifically, the first end of suction inlet 32 32a and external connection, the second end 32b of suction inlet 32 are connected with the circumferential lateral surface of injector body 31.Suction inlet 32 is at it Inside has the stream 32r for connecting the first end 32a of suction inlet 32 with the second end 32b.Stream 32r is formed as from Tapers of the one end 32a towards the second end 32b undergauges.It is connected at the stream 32r the being internally formed interflow of the suction inlet 32 The stream 31r of above-mentioned injector body 31 pars intermedia.Here, illustrate that stream 32r is formed as the situation of taper, but stream 32r may not be taper.

In this embodiment, pressure-air supplying tubing 35 connects with the pressure-air supply source 37 such as turbo-compressor Connect.

The first end 32a of suction inlet 32 is connected with low-pressure air supply source 38, the low-pressure air supply source 38 supply ratio The low-pressure air AL of the pressure-air AH low pressure generated by pressure-air supply source 37.Low-pressure air supply in the embodiment Source 38 is taken into air and supplied as low-pressure air AL and to suction inlet 32.Here, the place for being taken into air can be for example upper first Plate, hull 11 inner space in any one.

It is provided with air supply pipe 22 between injector body 31 and bubble blowing unit 21 in a manner of it can be opened and closed Check-valves V1.Check-valves V1 only allows the flowing from the lateral side of bubble blowing unit 21 of injector body 31, prevents to spray from bubble The flowing of the side of 21 lateral jetter main body of portion 31.

Switching valve V2 is provided between low-pressure air supply source 38 and injector body 31.Switching valve V2 is for low-pressure air The flowing of low-pressure air between supply source 38 and injector body 31 is opened and closed.

Next, the action that device 20A is reduced to above-mentioned frictional resistance illustrates.

In order that frictional resistance reduces device 20A work, first, make pressure-air in the state of switching valve V2 is closed Supply source 37 starts.Then, in injector body 31, pressure-air AH is matched somebody with somebody from first end 31a by pressure-air supply Pipe 35 is sent into stream 31r, and check-valves V1 is opened.Thus, pressure-air AH is supplied by check-valves V1 to bubble blowing unit 21 Give.Here, from first end 31a be sent into pressure-air AH in injector body 31, from first end in stream 31r During 31a flows towards the second end 31b, along with the diminution of flow path cross sectional area, flow velocity gradually rises.Due to the flow velocity Increase, the pressure in stream 31r declines and produces negative pressure.Caused negative pressure is from the second end of suction inlet 32 in stream 31r Portion 32b is extended in stream 32r.

Next, after low-pressure air supply source 38 is started, switching valve V2 is opened.Then, supplied from low-pressure air The low-pressure air AL sent out to source 38 flows into from the first end 32a of the suction inlet 32 of injector body 31 into stream 32r.Stream Enter and introduced to the low-pressure air AL in stream 32r from the second end 32b in the stream 31r to injector body 31.It is introduced into Collaborate to the low-pressure air AL in stream 31r in stream 31r with pressure-air AH, from the second end of injector body 31 31b is admitted to air supply pipe 22.Thus, air obtained from low-pressure air AL being added in pressure-air AH is to bubble Blowing unit 21 supplies.

Here, in Fig. 1, for the ease of diagram, from the first end 31a of injector body 31 to the second end 31b's It is integrally formed into taper.However, the shape of injector body 31 is not limited to the shape, as long as the of connection suction inlet 32 Two end 32b position can fully improve the shape of the flow velocity in stream 31r.Can also be the of injector body 31 Two end 31b set diffuser, recover the pressure of air in injector body 31.

Device, ship are reduced according to the frictional resistance of the air lubrication formula ship of above-mentioned first embodiment, will be from compression Pressure-air AH that the pressure-air such as machine supply source 37 supplies and the low-pressure air AL that supplies from low-pressure air supply source 38 are to gas Bubble blowing unit 21 supplies.Thereby, it is possible to increase the air mass flow sprayed from bubble blowing unit 21.Therefore, it is deeper even in absorbing water In the case of, an adequate amount of bubble can be also produced in water.

In addition, the situation phase with being only supplied the pressure-air AH from pressure-air supply source 37 to bubble blowing unit 21 Than collaborating by injector body 31 low-pressure air AL, can correspondingly reducing the power of pressure-air supply source 37. That is, can be ensured and the equal air mass flow of situation using only pressure-air supply source 37 with less power.

In addition, low-pressure air AL due to pressure-air AH in air supply unit 30A injector body 31 by being flowed Caused negative pressure and be introduced into and supplied to bubble blowing unit 21, there is no need for make low-pressure air AL and pressure-air The power at AH interflow.That is, can be suppressed with less consumed energy by the air sprayed from bubble blowing unit 21 in hull Caused frictional resistance between 11 and water.

As a result, the loss of the propulsive force for hull can be suppressed, effectively realize caused by fuel consumption reduction The raising of energy-saving effect, CO₂Discharge rate is cut down.

(second embodiment)

Next, being based on accompanying drawing, the frictional resistance of the air lubrication formula ship of second embodiment of the present invention is reduced Device, ship illustrate.Only it is the structure and the first reality for possessing air supply unit in second embodiment described below Apply mode difference.Therefore, for being illustrated with first embodiment identical part mark identical reference, and omit Repeat specification.

Fig. 2 is that the frictional resistance for the air lubrication formula ship for representing present embodiment reduces device, the overall structure of ship Schematic diagram.

As shown in Fig. 2 the ship 10 of present embodiment, which possesses frictional resistance, reduces device 20B.Frictional resistance reduces device 20B possesses bubble blowing unit 21, air supply unit 30A, low-pressure air supply unit (air boosting section) 40.

Low-pressure air supply unit 40 possesses air introduction pipe 41, air blower 42, air supply pipe 43.

The first end 41a of air introduction pipe 41 is from the hull 11 than water line L by the top, such as upper deck is into air Form opening.The second end 41b of air introduction pipe 41 is connected with air blower 42.

The air that air blower 42 makes to import by air introduction pipe 41 boosts, and generates more empty than the low pressure of pressure-air AH low pressure Gas AL2.

Air supply pipe 43 connects air blower 42 and bubble blowing unit 21.Will be by air blast via the air supply pipe 43 Low-pressure air AL2 after machine 42 boosts is sent into bubble blowing unit 21.

Switching valve V2 is provided between low-pressure air supply source 38 and injector body 31.Switching valve V2 is supplied low-pressure air Stream to the low-pressure air between source 38 and injector body 31 is opened and closed.

Non-return is provided with a manner of it can be opened and closed on air supply pipe 43 between air blower 42 and bubble blowing unit 21 Valve V3.Check-valves V3 only allows the flowing from the lateral side of bubble blowing unit 21 of air blower 42, prevents lateral from bubble blowing unit 21 The flowing of the side of air blower 42.

It is identical with above-mentioned first embodiment in frictional resistance reduces device 20B, by air supply unit 30A, from pressure The pressure-air AH and exist from the low-pressure air AL of the supply of low-pressure air supply source 38 that the pressure-air such as contracting machine supply source 37 supplies After collaborating in injector body 31, supplied to bubble blowing unit 21.

The frictional resistance of present embodiment, which reduces device 20B, can make air supply unit 30A and low-pressure air supply unit 40 Alternatively work and air is supplied to bubble blowing unit 21.

For example, in the case where light draught Even Keel is shallower, by low-pressure air supply unit 40 by low-pressure air AL2 to Bubble blowing unit 21 supplies.More specifically, in the state of switching valve V2 closings, air blower 42 is made to work.Next, will be only Return valve V3 to open, the low-pressure air AL2 from air blower 42 is supplied to bubble blowing unit 21.

For example, in the case of full-load draft Even Keel relatively depth, by air supply unit 30A by pressure-air AH and low pressure Air AL supplies to bubble blowing unit 21.More specifically, since the state that switching valve V2 is closed, with first embodiment phase Together, the work, the startup of low-pressure air supply source 38, switching valve V2 opening action of pressure-air supply source 37 are carried out successively. Thus, pressure-air AH and low-pressure air AL are supplied to bubble blowing unit 21.

The frictional resistance of present embodiment, which reduces device 20B, can also make low-pressure air supply unit 40 and air supply unit 30A works simultaneously.Accordingly, for bubble blowing unit 21, in addition to pressure-air AH, low-pressure air AL and low can be also supplied Press air AL2.

According to above-mentioned second embodiment, due to possessing low-pressure air supply unit 40 and air supply unit 30A, therefore can Consumed energy is suppressed according to drinking water, and the air of appropriate amount is supplied to bubble blowing unit 21.

In addition, it is identical with above-mentioned first embodiment, in the case where supplying air from air supply unit 30A, from compression Pressure-air AH that the pressure-air such as machine supply source 37 supplies and the low-pressure air AL that supplies from low-pressure air supply source 38 are to gas Bubble blowing unit 21 supplies.Therefore, it is possible to increase the air mass flow sprayed from bubble blowing unit 21.That is, can be with less than in the past Power, it is ensured that with the past equal air mass flow.

If in addition, make low-pressure air supply unit 40 and air supply unit 30A while work, for bubble blowing unit 21, in addition to pressure-air AH, additionally it is possible to supply low-pressure air AL and low-pressure air AL2.Thereby, it is possible to further increase to The air mass flow that bubble blowing unit 21 supplies.

So, with less consumed energy, suppressed by the air sprayed from bubble blowing unit 21 in hull 11 and water Between caused frictional resistance, the loss thus, it is possible to suppress the propulsive force for hull, can effectively realize and be disappeared by fuel The raising of energy-saving effect, CO caused by consumption reduction₂Discharge rate is cut down.

(the 3rd embodiment)

Next, being based on accompanying drawing, the frictional resistance of the air lubrication formula ship of third embodiment of the present invention is reduced Device, ship illustrate.In the 3rd embodiment, for first embodiment, second embodiment identical portion Minute mark note identical reference illustrates, and omits repeat specification.

Fig. 3 is that the frictional resistance for the air lubrication formula ship for representing present embodiment reduces device, the overall structure of ship Schematic diagram.

As shown in figure 3, the ship 10 of present embodiment, which possesses frictional resistance, reduces device 20C.The frictional resistance reduces dress Put 20C and possess bubble blowing unit 21, air supply unit 30C, low-pressure air supply unit 40.

Air supply unit 30C possesses injector body 31.Suction inlet is connected with the circumferential lateral surface of the injector body 31 32。

In the first end 31a connection pressure-airs supplying tubing 35 of injector body 31, on the other hand in injector master The second end 31b connections air supply pipe 22 of body 31.

The branch of pressure-air supplying tubing 35 of present embodiment is connected to booster (pressure-air supply source, subsidiary engine) 14 Discharge side.The pressure-air supplying tubing 35 is using a part for the compressed air discharged from booster 14 as pressure-air AH It is sent into the first end 31a of injector body 31.

Low-pressure air supplying tubing 39 is connected with the first end 32a of suction inlet 32.The low-pressure air of present embodiment Supplying tubing 39 forms opening at hull 11, to than water line L air by the top, using air as low-pressure air AL to suction Entrance 32 is sent into.

It is provided with air supply pipe 22 between injector body 31 and bubble blowing unit 21 in a manner of it can be opened and closed Check-valves V1.

Switching valve V2 is provided with a manner of it can be opened and closed in the low-pressure air supplying tubing 39 for be taken into air.Switching valve V2 Make the flowing from low-pressure air supplying tubing 39 to the low-pressure air of injector body 31 interrupted.

Non-return is provided with a manner of it can be opened and closed on air supply pipe 43 between air blower 42 and bubble blowing unit 21 Valve V3.

In addition, on pressure-air AH pressure-air supplying tubing 35 is taken into from booster 14 in a manner of it can be opened and closed Provided with switching valve V4.Switching valve V4 can make the stream of the pressure-air AH from from pressure-air supplying tubing 35 to injector body 31 Dynamic circuit breaker is continuous and adjusts its flow.

When the state closed from switching valve V2, V4 starts to open at switching valve V4, the high pressure after being compressed by booster 14 is empty Injector bodies 31 of the gas AH from first end 31a by pressure-air supplying tubing 35 to such air supply unit 30C Stream 31r is sent into.Next, open check-valves V1.Thus, from injector body 31 by check-valves V1 to bubble blowing unit 21 Supply pressure-air AH.Here, from first end 31a be sent into pressure-air AH in injector body 31, flow velocity gradually rises Height, negative pressure is produced in stream 31r.

Next, when opening switching valve V2, the low pressure being made up of the air being taken into from low-pressure air supplying tubing 39 is empty Gas AL is flowed into due to the negative pressure in injector body 31 from the first end 32a of suction inlet 32 into stream 32r.

The low-pressure air AL being flowed into stream 32r is drawn from the second end 32b in the stream 31r to injector body 31 Enter.It is introduced in the low-pressure air AL in stream 31r in stream 31r with pressure-air AH to collaborate, from injector body 31 The second end 31b be admitted to air supply pipe 22.Thus, supplied to bubble blowing unit 21 added in pressure-air AH it is low Air obtained from pressing air AL.

Identical with second embodiment, the frictional resistance, which reduces device 20C, can make air supply unit 30C and low-pressure air Supply unit 40 alternatively works and supplies air to bubble blowing unit 21.Thus, it is for example, more shallower in light draught Even Keel In the case of, low-pressure air AL2 is supplied to bubble blowing unit 21 by low-pressure air supply unit 40.More specifically, switching In the state of valve V2, V4 are closed, air blower 42 is set to work.Next, open check-valves V3.Thus, by low-pressure air AL2 to gas Bubble blowing unit 21 supplies.

For example, in the case of full-load draft Even Keel relatively depth, by air supply unit 30A by pressure-air AH and low pressure Air AL supplies to bubble blowing unit 21.More specifically, since the state that switching valve V2, V4 is closed, with this 3rd implementation Mode in the same manner, switches over valve V4 opening action, switching valve V2 opening action successively.Thus, by pressure-air AH and Low-pressure air AL supplies to bubble blowing unit 21.

It is further possible to make low-pressure air supply unit 40 and air supply unit 30C while work, for bubble blowing unit 21, in addition to pressure-air AH, also supply low-pressure air AL and low-pressure air AL2.

According to above-mentioned 3rd embodiment, using a part for the compressed air discharged from booster 14 as pressure-air AH Utilize, therefore compressor etc. need not be prepared in order to obtain pressure-air AH, zero can be suppressed compared with second embodiment Part number.

In the above-described 3rd embodiment, using a part for the compressed air discharged from booster 14 as pressure-air AH Utilize, but for example can also be using from making the waste gas of main frame 13 that the hull 11 of ship 10 promotes as pressure-air AH to spray Emitter main body 31 is sent into.In this case, as shown in figure 3, substitution pressure-air supplying tubing 35 and main frame 13 will be come from by setting The waste gas supply pipe 35G (following, the 4th to the 6th embodiment is also identical) that is sent into injector body 31 of waste gas.In waste gas Supply pipe 35G is provided with switching valve V4 ' in a manner of it can be opened and closed.Switching valve V4 ' can make from waste gas supply pipe 35G to injector The pressure-air AH of main body 31 flowing is interrupted and adjusts its flow.

(the 4th embodiment)

Next, being based on accompanying drawing, the frictional resistance of the air lubrication formula ship of the 4th embodiment of the present invention is reduced Device, ship illustrate.In the 4th embodiment, for the first to the 3rd embodiment identical part, mark Identical reference illustrates, and omits repeat specification.

Fig. 4 is that the frictional resistance for the air lubrication formula ship for representing present embodiment reduces device, the overall structure of ship Schematic diagram.

As shown in figure 4, the ship 10 of present embodiment, which possesses frictional resistance, reduces device 20D.The frictional resistance reduces dress Put 20D and possess bubble blowing unit 21, air supply unit 30D.

Air supply unit 30D possesses injector body 31.Moreover, the circumferential lateral surface in injector body 31 is connected with suction Mouth 32.

Identical with the respective embodiments described above, injector body 31 has the stream 31r of taper.The of injector body 31 One end 31a is connected with pressure-air supplying tubing 35, and air supply pipe 22 is connected with the second end 31b.Implement with the 3rd In the same manner, the pressure-air supplying tubing 35 of present embodiment is connected to the discharge side of booster 14 to mode, will be from booster 14 A part for the compressed air of discharge is sent into as pressure-air AH to the first end 31a of injector body 31.

Low-pressure air supplying tubing 39 is connected with the first end 32a of suction inlet 32.The low-pressure air of present embodiment Supplying tubing 39 is connected with air blower 42.The air imported by air introduction pipe 41 is sucked and boosted by air blower 42, Generate the low-pressure air AL than pressure-air AH low pressure.Low-pressure air AL is via low-pressure air supplying tubing 39 to suction inlet 32 Import.

In low-pressure air supplying tubing 39, set between air blower 42 and injector body 31 in a manner of it can be opened and closed There is switching valve V2.Switching valve V2 makes the flowing from low-pressure air supplying tubing 39 to the low-pressure air of injector body 31 interrupted.

It is provided with pressure-air AH pressure-air supplying tubing 35 is taken into from booster 14 in a manner of it can be opened and closed Switching valve V4.Switching valve V4 makes the interrupted of the flowing of the pressure-air AH from from pressure-air supplying tubing 35 to injector body 31 And adjust its flow.

In air supply unit 30D, when the state closed from switching valve V2, V4 starts to open at switching valve V4, by being pressurized Pressure-air AH after device 14 compresses is sent into from first end 31a by pressure-air supplying tubing 35 to injector body 31. Next, open check-valves V1.Thus, pressure-air AH is supplied from injector body 31 by check-valves V1 to bubble blowing unit 21 Give.Here, from the first end 31a of the injector body 31 pressure-air AH being sent into flow velocity in injector body 31 gradually Rise, negative pressure is produced in stream 31r.

Next, after making air blower 42 work, switching valve V2 is opened, so as to which low-pressure air AL be sent to suction inlet 32 Enter.Then, by the negative pressure in injector body 31, the low-pressure air AL of suction inlet 32 will be imported into injector body 31 Introduce.It is introduced in the low-pressure air AL in stream 31r in stream 31r with pressure-air AH to collaborate, from injector body 31 the second end 31b is sent into air supply pipe 22.Thus, low-pressure air AL will be added in pressure-air AH and obtained Air supplied to bubble blowing unit 21.

According to above-mentioned 4th embodiment, after being boosted by the pressure-air AH after being compressed by booster 14 and by air blower 42 Low-pressure air AL supplied to bubble blowing unit 21.Thereby, it is possible to increase the air mass flow sprayed from bubble blowing unit 21.Especially Be in the case of the 4th embodiment, compared with the situation for being intactly taken into air as low-pressure air AL, energy Enough increase low-pressure air AL flow.

(the 5th embodiment)

Next, being based on accompanying drawing, the frictional resistance of the air lubrication formula ship of the 5th embodiment of the present invention is reduced Device, ship illustrate.In the 5th embodiment, for the first~the 4th embodiment identical part, mark Identical reference illustrates, and omits repeat specification.

Fig. 5 is that the frictional resistance for the air lubrication formula ship for representing present embodiment reduces device, the overall structure of ship Schematic diagram.

As shown in figure 5, the ship 10 of present embodiment, which possesses frictional resistance, reduces device 20E.The frictional resistance reduces dress Put 20E and possess bubble blowing unit 21, bubble recoverer 25, air supply unit 30E, low-pressure air supply unit 40.

Bubble recoverer 25 reclaims the bubble generated by bubble blowing unit 21.Bubble recoverer 25 forms downward opening And located at the hull bottom 11b of hull 11.The bubble recoverer 25 is on ship cephalocaudal direction, and compared to propeller 12, configuration is in bow portion 11f sides, and 11r sides on the quarter are configured as much as possible.

Air supply unit 30E possesses injector body 31.Suction inlet 32 is connected in the circumferential lateral surface of injector body 31.

Identical with the respective embodiments described above, injector body 31 has the stream 31r of taper.The of injector body 31 One end 31a is connected with pressure-air supplying tubing 35, and is connected with air supply in the second end 31b of injector body 31 Pipe 22.

The pressure-air supplying tubing 35 of present embodiment is connected to the discharge side of booster 14.Sprayed from booster 14 A part for compressed air is sent into as pressure-air AH to the first end 31a of injector body 31.

Low-pressure air supplying tubing 39 is connected with the first end 32a of suction inlet 32.The low-pressure air of present embodiment Supplying tubing 39 is connected to bubble recoverer 25, the air obtained from the bubble reclaimed by the bubble recoverer 25 is used as low Pressure air AL is sent into suction inlet 32.

It is provided with pressure-air AH pressure-air supplying tubing 35 is taken into from booster 14 in a manner of it can be opened and closed Switching valve V4.Switching valve V4 make the pressure-air AH from flowing from pressure-air supplying tubing 35 to injector body 31 discontinuously and Adjust its flow.

It is empty regarding the air obtained from the bubble reclaimed by bubble recoverer 25 as the low pressure that low-pressure air AL is taken into Gas supplying tubing 39 makes to be provided with check-valves V5.Check-valves V5 only allows the flowing from bubble recoverer 25 to suction inlet 32, resistance The only flowing from suction inlet 32 to bubble recoverer 25.Check-valves V5, which has from bubble recoverer 25 to the flow of suction inlet 32, to be adjusted Whole function.Here, in the present embodiment, there is flow adjustment function exemplified with check-valves V5, but can also incite somebody to action Check-valves and flow rate regulating valve are connected in series.

In air supply unit 30E, since the state that switching valve V4, check-valves V5 are closed, switching valve V4 is opened.In It is that the pressure-air AH after being compressed from booster 14 is from first end 31a by pressure-air supplying tubing 35 to injector master Body 31 is sent into.Next, open check-valves V1.Thus, supplied from injector body 31 by check-valves V1 to bubble blowing unit 21 Give pressure-air AH.Pressure-air AH flow velocitys in injector body 31 are gradually risen, and negative pressure is produced in stream 31r.

Next, open check-valves V5.Then, by the air i.e. low-pressure air AL that bubble recoverer 25 reclaims from suction inlet The flow that 32 first end 32a has been flowed into after being adjusted by the check-valves V5 that can carry out flow adjustment.It is flowed into the stream Low-pressure air AL in 32r introduces from the second end 32b into the stream 31r of injector body 31, in stream 31r and high pressure Air AH collaborates, and is sent into from the second end 31b of injector body 31 to air supply pipe 22.Accordingly, for bubble blowing unit 21, in addition to pressure-air AH, also supply low-pressure air AL.

It in such frictional resistance reduces device 20E, can select air supply unit 30E and low-pressure air supply unit 40 One ground works and supplies air to bubble blowing unit 21.

Thus, such as in the case of shallower draft, can by low-pressure air supply unit 40 by low-pressure air AL2 to gas Bubble blowing unit 21 supplies, can be by air supply unit 30E by pressure-air AH and low-pressure air in the case where absorbing water relatively depth AL supplies to bubble blowing unit 21.

In addition it is also possible to make low-pressure air supply unit 40 and air supply unit 30E while work, for bubble blowing unit 21, in addition to pressure-air AH, also supply low-pressure air AL and low-pressure air AL2.

According to above-mentioned 5th embodiment, due to possessing low-pressure air supply unit 40 and air supply unit 30E, therefore can Suppress consumed energy according to drinking water and supply the air of appropriate amount to bubble blowing unit 21.

From air supply unit 30E supply air in the case of, by the pressure-air AH after being compressed by booster 14 and from The low-pressure air AL that the bubble reclaimed by bubble recoverer 25 obtains supplies to bubble blowing unit 21.Therefore, it is possible to increase from The air mass flow that bubble blowing unit 21 sprays.

If, can be for bubble blowing unit in addition, make low-pressure air supply unit 40 and air supply unit 30E while work 21, in addition to pressure-air AH, it is also supplied with low-pressure air AL and low-pressure air AL2.Thereby, it is possible to further increase to bubble The air mass flow that blowing unit 21 supplies.

Because a part for the compressed air that will be sprayed from booster 14 utilizes as pressure-air AH, therefore need not be Obtain pressure-air AH and prepare compressor etc., the effect above can be obtained with low cost.

Especially in the 5th embodiment, low-pressure air AL is obtained from the bubble reclaimed by bubble recoverer 25, Therefore do not needing any energy or cost this respect favourable.

In addition, reclaiming low-pressure air AL by using bubble recoverer 25, bubble and the stern in hull 11 can be suppressed The contact for the propeller 12 that portion 11r is set, the generation of vibration and the decline of propulsive efficiency can be suppressed.

(the 6th embodiment)

Next, being based on accompanying drawing, the frictional resistance of the air lubrication formula ship of the 6th embodiment of the present invention is reduced Device, ship illustrate.In the 6th embodiment, for the first to the 5th embodiment identical part, mark Identical reference illustrates, and omits repeat specification.

Fig. 6 is that the frictional resistance for the air lubrication formula ship for representing present embodiment reduces device, the overall structure of ship Schematic diagram.

As shown in fig. 6, the ship 10 of present embodiment, which possesses frictional resistance, reduces device 20F.Frictional resistance reduces device 20F possesses bubble blowing unit 21, bubble recoverer 25, air supply unit 30F.

Air supply unit 30F possesses injector body 31.Suction inlet 32 is connected with the circumferential lateral surface of injector body 31.

Identically with the respective embodiments described above, injector body 31 has the stream 31r of taper.In injector body 31 First end 31a is connected with pressure-air supplying tubing 35, and is connected with air in the second end 31b of injector body 31 and supplies To pipe 22.

In the present embodiment, pressure-air supplying tubing 35 is connected to the discharge side of booster 14.Will be from booster 14 A part for the compressed air of discharge is sent into as pressure-air AH to the first end 31a of injector body 31.

Low-pressure air supplying tubing 39 is connected with the first end 32a of suction inlet 32.The low-pressure air of present embodiment Supplying tubing 39 is branched off into two forks by branched pipe 39a and branched pipe 39b.Branched pipe 39a is connected with bubble recoverer 25, point Branch pipe 39b is connected with air blower 62.The air that air blower 62 makes to import by air introduction pipe 61 boosts.That is, low-pressure air supplies Air after being boosted to pipe arrangement 39 by the air obtained from the bubble reclaimed by bubble recoverer 25 and by air blower 62 is used as Low-pressure air AL supplies to suction inlet 32.The quantity delivered of low-pressure air AL based on air blower 62 can be according to from bubble recoverer 25 Flow of recovery air of recovery etc. and suitably change.

Identically with the 5th embodiment, it is used as low pressure in the air obtained from the bubble reclaimed by bubble recoverer 25 Air AL and the branched pipe 39a of low-pressure air supplying tubing 39 that is taken into is provided with the check-valves V5 that can carry out flow adjustment. The interrupted switching valve V6 of the flowing for the air for making to be sent into from air blower 62 is provided with branched pipe 39b.

In air supply unit 30F, when the state closed from switching valve V4, V6, check-valves V5 starts to open at switching valve V4 When, pressure-air AH after being compressed from booster 14 is from first end 31a by pressure-air supplying tubing 35 to injector master Body 31 is sent into.Next, open check-valves V1.Thus, pressure-air AH from injector body 31 by check-valves V1 to bubble Blowing unit 21 supplies.Here, the pressure-air AH being sent into from the first end 31a of injector body 31 is in injector body 31 Flow velocity is gradually risen, and negative pressure is produced in stream 31r.

Next, when opening check-valves V5, due to the negative pressure in injector body 31, reclaimed by bubble recoverer 25 Air to be low-pressure air AL flow into from the first end 32a of suction inlet 32.In addition, after making air blower 62 work, pass through Open switching valve V6 and low-pressure air AL is sent into suction inlet 32.Thus, the air that is reclaimed by bubble recoverer 25 and by rousing Air after blower fan 62 boosts is that low-pressure air AL flows into injector body 31.The low-pressure air AL being flowed into stream 32r It is introduced in the stream 31r of injector body 31, collaborates in stream 31r with pressure-air AH, from spray from the second end 32b The second end 31b of emitter main body 31 is sent into air supply pipe 22.Supplied accordingly, for bubble blowing unit 21 in pressure-air Air obtained from low-pressure air AL is added in AH.

According to above-mentioned 6th embodiment, in air supply unit 30F, pressure-air AH after being compressed by booster 14 with Low-pressure air AL that air after being boosted from the air reclaimed from bubble recoverer 25 and by air blower 62 obtains collaborate and to Bubble blowing unit 21 supplies.Therefore, it is possible to increase the air mass flow sprayed from bubble blowing unit 21.Especially implement the 6th In mode, a low-pressure air AL part is not required to using the air obtained from the bubble reclaimed by bubble recoverer 25 Want any energy, cost.Further, since the air after being boosted by air blower 62 is used as low-pressure air AL, thus from by During the underfed for the obtained low-pressure air AL of bubble that bubble recoverer 25 reclaims etc., low-pressure air AL stream can be increased Amount.

(the 7th embodiment)

Next, being based on accompanying drawing, the frictional resistance of the air lubrication formula ship of the 7th embodiment of the present invention is reduced Device, ship illustrate.In the 7th embodiment, for the first to the 6th embodiment identical part, mark Identical reference illustrates, and omits repeat specification.

Fig. 7 is that the frictional resistance for the air lubrication formula ship for representing present embodiment reduces device, the overall structure of ship Schematic diagram.

As shown in fig. 7, the ship 10 of present embodiment, which possesses frictional resistance, reduces device 20G.The frictional resistance reduces dress Put 20G and possess bubble blowing unit 21 and air supply unit 30G.

Air supply unit 30G possesses injector body 31.Suction inlet 32 is connected with the circumferential lateral surface of injector body 31.

Identically with the respective embodiments described above, injector body 31 has the stream 31r of taper.In injector body 31 First end 31a is connected with pressure-air supplying tubing 35, and air supply is connected with the second end 31b of injector body 31 Pipe 22.

In the present embodiment, the pressure-air supply source 37 such as with turbo-compressor of pressure-air supplying tubing 35 connects Connect.

Switching valve V2 is provided with a manner of it can be opened and closed in low-pressure air supplying tubing 39.Switching valve V2 makes empty from low pressure Flowing of the gas supplying tubing 39 to the low-pressure air of injector body 31 is interrupted.

In air supply unit 30G, in the state of switching valve V2 closings, start pressure-air supply source 37.Then, In injector body 31, pressure-air AH is sent into from first end 31a by pressure-air supplying tubing 35 to stream 31r. Next, open check-valves V1.Thus, pressure-air AH is supplied by check-valves V1 to bubble blowing unit 21.From injector master The pressure-air AH that the first end 31a of body 31 is sent into flow velocitys in injector body 31 gradually rise, and are produced in stream 31r Negative pressure.

Next, open switching valve V2.Then, the low pressure being made up of the air being taken into from low-pressure air supplying tubing 39 is empty Gas AL is flowed into by the negative pressure in injector body 31 from the first end 32a of suction inlet 32 into stream 32r.It is flowed into Low-pressure air AL in the 32r of road is introduced into from the second end 32b into the stream 31r of injector body 31, in stream 31r with Pressure-air AH collaborates.The air collaborated in stream 31r is from the second end 31b of injector body 31 to air supply pipe 22 are sent into.Air obtained from adding low-pressure air AL in pressure-air AH is supplied accordingly, for bubble blowing unit 21.

, will be by the pressure-air supply source such as turbo-compressor in air supply unit 30G according to above-mentioned 7th embodiment Pressure-air AH and air after 37 compressions are that low-pressure air AL supplies to bubble blowing unit 21.Therefore, it is possible to increase from bubble The air mass flow that blowing unit 21 sprays.

So, with less consumed energy, suppressed by the air sprayed from bubble blowing unit 21 in hull 11 and water Between caused frictional resistance, so as to suppress the loss of the propulsive force for hull, realize by fuel consumption cut down produce The raising of energy-saving effect, CO₂Effective reduction of discharge rate.

In such a configuration, air supply unit 30G configurations are in the bow portion 11f sides of hull 11, it is not necessary to quarter The pipe arrangement of the grade connection of booster 14 of 11r sides.As a result, device structure simplifies, cost degradation can be realized.

(the 8th embodiment)

Next, being based on accompanying drawing, the frictional resistance of the air lubrication formula ship of the 8th embodiment of the present invention is reduced Device, ship illustrate.In the 8th embodiment, for the first to the 7th embodiment identical part, mark Identical reference illustrates, and omits repeat specification.

Fig. 8 is that the frictional resistance for the air lubrication formula ship for representing present embodiment reduces device, the overall structure of ship Schematic diagram.

As shown in figure 8, the ship 10 of present embodiment, which possesses frictional resistance, reduces device 20H.Frictional resistance reduces device 20H possesses bubble blowing unit 21, bubble recoverer 25, air supply unit 30H.

Air supply unit 30H possesses injector body 31.Suction inlet 32 is connected with the circumferential lateral surface of injector body 31. Identically with the respective embodiments described above, injector body 31 has the stream 31r of taper.In the first end of injector body 31 31a is connected with pressure-air supplying tubing 35, and air supply pipe 22 is connected with the second end 31b of injector body 31.This The pressure-air supply source 37 such as with turbo-compressor of pressure-air supplying tubing 35 of embodiment is connected.

Low-pressure air supplying tubing 39 is connected with the first end 32a of suction inlet 32.The low-pressure air of present embodiment Supplying tubing 39 is connected with bubble recoverer 25, is used as low pressure sky from the air obtained by the bubble recoverer 25 recovery bubble Gas AL is taken into suction inlet 32.

Empty and the low pressure being taken into as low-pressure air AL from the air that the bubble reclaimed by bubble recoverer 25 obtains Gas supplying tubing 39 is provided with check-valves V5.

In air supply unit 30H, since the state that check-valves V1, check-valves V5 are closed, make pressure-air supply source 37 Start.Thus, in injector body 31, height is sent into stream 31r from first end 31a by pressure-air supplying tubing 35 Press air AH.Next, open check-valves V1.Thus, pressure-air AH is supplied by check-valves V1 to bubble blowing unit 21.From The pressure-air AH that the first end 31a of injector body 31 is sent into flow velocitys in injector body 31 gradually rise, in stream Negative pressure is produced in 31r.

Next, open check-valves V5.Then, by the air i.e. low-pressure air AL that bubble recoverer 25 reclaims from suction inlet 32 first end 32a is flowed into.Thus, the air reclaimed by bubble recoverer 25 i.e. low-pressure air AL from suction inlet 32 first End 32a flows into injector body 31.Low-pressure air AL in stream 32r is flowed into from the second end 32b by injection Introduce, collaborate in stream 31r with pressure-air AH, from the second end of injector body 31 in the stream 31r of device main body 31 31b is sent into air supply pipe 22.Supplied accordingly, for bubble blowing unit 21 and low-pressure air AL is added in pressure-air AH Obtained from air.

According to above-mentioned 8th embodiment, in air supply unit 30H, by the pressure-air such as turbo-compressor supply source 37 Pressure-air AH after compression collaborates with the low-pressure air AL reclaimed by bubble recoverer 25, and is supplied to bubble blowing unit 21. Therefore, it is possible to increase the air mass flow sprayed from bubble blowing unit 21.Identically with the 6th embodiment, low-pressure air AL is from logical The bubble for crossing the recovery of bubble recoverer 25 obtains, therefore does not need any energy, cost.Low-pressure air AL is under hull bottom 11b Fang Jinhang reclaim, therefore compared to above-mentioned 7th embodiment air and pressure rise, with the situation phase boosted to air Than can further improve energy efficiency.

(the 9th embodiment)

Next, being based on accompanying drawing, the frictional resistance of the air lubrication formula ship of the 9th embodiment of the present invention is reduced Device, ship illustrate.In the 9th embodiment, for the first~the 8th embodiment identical part, mark Identical reference illustrates, and omits repeat specification.

Fig. 9 is that the frictional resistance for the air lubrication formula ship for representing present embodiment reduces device, the overall structure of ship Schematic diagram.

As shown in figure 9, the ship 10 of present embodiment, which possesses frictional resistance, reduces device 20J.Frictional resistance reduces device 20J possesses bubble blowing unit 21, air supply unit 30J.

Air supply unit 30J possesses injector body 31.Suction inlet 32 is connected in the circumferential lateral surface of the injector body 31. Identically with the respective embodiments described above, injector body 31 has the stream 31r of taper.In the first end of injector body 31 31a is connected with pressure-air supplying tubing 35, and air supply pipe 22 is connected with the second end 31b of injector body 31.This The pressure-air supply source 37 such as with turbo-compressor of pressure-air supplying tubing 35 of embodiment is connected.

Low-pressure air supplying tubing 39 is connected with the first end 32a of suction inlet 32.The low-pressure air of present embodiment Supplying tubing 39 is connected to the discharge side of booster 14, empty as low pressure from a part for the compressed air of the booster 14 discharge Gas AL is sent into the first end 31a of injector body 31.In the case of present embodiment assumes that the output of main frame 13 is less Structure.After the compressed air ratio sprayed from the booster 14 of present embodiment is compressed by the pressure-air such as compressor supply source 37 Pressure-air AH low pressure, therefore can be used as low-pressure air AL utilize.

It is provided with low-pressure air AL low-pressure air supplying tubing 39 is taken into from booster 14 in a manner of it can be opened and closed Switching valve V4.Switching valve V4 make the low-pressure air AL from flowing from low-pressure air supplying tubing 39 to injector body 31 discontinuously and Adjust its flow.

In air supply unit 30J, in the state of switching valve V4 closings, pressure-air supply source 37 is set to work.Then, Pressure-air AH is sent into from pressure-air supply source 37 to the first end 31a of injector body 31.Next, open check-valves V1.Pressure-air AH flow velocitys in injector body 31 are gradually risen, and negative pressure is produced in stream 31r.

Next, open switching valve V4.Then, from booster 14 send out low-pressure air AL due in injector body 31 Negative pressure, flowed into from the first end 32a of suction inlet 32.Low-pressure air AL in stream 32r is flowed into from the second end 32b It is introduced in the stream 31r of injector body 31, collaborates in stream 31r with pressure-air AH, from injector body 31 The second end 31b is sent into air supply pipe 22.Supplied accordingly, for bubble blowing unit 21 added in pressure-air AH it is low Air obtained from pressing air AL.

According to above-mentioned 9th embodiment, pressure-air AH after being compressed by the pressure-air such as compressor supply source 37 and by Low-pressure air AL after booster 14 compresses collaborates and supplied to bubble blowing unit 21.Therefore, it is possible to increase from bubble blowing unit 21 air mass flows sprayed.Especially low-pressure air AL utilizes a part for the compressed air sprayed from booster 14, therefore energy Enough air mass flows that further increase sprays from bubble blowing unit 21.

(the tenth embodiment)

Next, being based on accompanying drawing, the frictional resistance of the air lubrication formula ship of the tenth embodiment of the present invention is reduced Device, ship illustrate.In the tenth embodiment, for the first~the 9th embodiment identical part, mark Identical reference illustrates, and omits repeat specification.

Figure 10 is that the frictional resistance for the air lubrication formula ship for representing present embodiment reduces device, the overall structure of ship Schematic diagram.

As shown in Figure 10, the ship 10 of present embodiment, which possesses frictional resistance, reduces device 20K.Frictional resistance reduces device 20K possesses bubble blowing unit 21, bubble recoverer 25, air supply unit 30K, low-pressure air supply unit 40.

The air supply unit 30K of present embodiment possesses two injector bodies 31 of series connection.With the respective embodiments described above Equally, these injector bodies 31 have the stream 31r of taper.Upstream is configured in the injector body 31 being connected in series The injector body 31A of side first end 31a is connected with pressure-air supplying tubing 35.It is being configured at the injector of upstream side Main body 31A the second end 31b is connected with connecting tube 49.The injector body 31B in downstream first end 31a is via connection Pipe 49 and be connected with the injector body 31A of upstream side.In the injector body 31B in downstream the second end 31b connections There is air supply pipe 22.

The pressure-air supplying tubing 35 of present embodiment is connected to the discharge side of booster 14, is discharged from booster 14 The first end 31a of injector body 31 of the part for compressed air as pressure-air AH to the upstream side is sent into.

It is connected in the first end 32a of the suction inlet 32 located at injector body 31A, 31B in branched halfway Low-pressure air supplying tubing 39.The low-pressure air supplying tubing 39 of present embodiment is connected with bubble recoverer 25.It is low by this Air supplying tubing 39 is pressed, the air obtained from the bubble reclaimed by bubble recoverer 25 is used as low-pressure air AL to each suction Entrance 32 distributes.

Empty and the low pressure being taken into as low-pressure air AL from the air that the bubble reclaimed by bubble recoverer 25 obtains Gas supplying tubing 39 is provided with check-valves V51.

Switching valve V7 is provided with the low-pressure air supplying tubing 39 towards the injector body 31A branches of upstream side.It is logical Cross and open switching valve V7, injector body 31A and injector body 31B shuntings can be respectively facing by turning into low-pressure air AL State.By closing switching valve V7, turn into the state that low-pressure air AL can be only supplied to injector body 31B.

In air supply unit 30K, cut when the state closed from switching valve V4, switching valve V7, check-valves V51 starts to open at When changing valve V4, the pressure-air AH after being compressed by booster 14 is upward by pressure-air supplying tubing 35 from first end 31a The injector body 31A for swimming side is sent into.Next, open check-valves V1.Thus, pressure-air AH is from the injector being connected in series Main body 31A and injector body 31B each injector body 31 is supplied by check-valves V1 to bubble blowing unit 21.

The pressure-air AH that the stream 31r of injector body 31A to the upstream side is sent into flow velocitys in injector body 31A Gradually rise, negative pressure is produced in stream 31r.The pressure-air AH sent out from the injector body 31A of upstream side is via even Adapter 49 downstream side injector body 31B be sent into.The pressure-air AH for being sent to injector body 31B stream 31r exists Flow velocity is gradually risen in injector body 31B, and negative pressure is produced in stream 31r.

Next, open check-valves V51.Then, due to the negative pressure in injector body 31B injector body 31, lead to The air i.e. low-pressure air AL for crossing the recovery of bubble recoverer 25 flows from the first end 32a of injector body 31B suction inlet 32 Enter.

If in addition, opening switching valve V7, low-pressure air AL is low by the injector body 31A branches towards upstream side Pressure air supplying tubing 39 is also fed to the injector body 31A of upstream side suction inlet 32.Thus, it is flowed into the spray of upstream side Low-pressure air AL in emitter main body 31A stream 32r is introduced into injector body 31A stream 31r, in stream 31r Collaborate with pressure-air AH, sent out from the injector body 31A of upstream side the second end 31b.

The low-pressure air AL being flowed into the stream 32r of injector body 31B suction inlet 32 is introduced in injector master In body 31B stream 31r, collaborate in stream 31r with air (AH+AL), the air (AH+AL+AL) at the interflow is from downstream Injector body 31B the second end 31b send out.

It in such frictional resistance reduces device 20K, can select air supply unit 30K and low-pressure air supply unit 40 One ground works and supplies air to bubble blowing unit 21.

Thus, for example, in the case of shallower draft, in the state that switching valve V4, V51, V7 and check-valves V51 are closed Under, air blower 42 is worked, make check-valves V3 open, so as to using low-pressure air supply unit 40 by low-pressure air AL2 to Bubble blowing unit 21 supplies.

In the case where absorbing water relatively depth, in the state of check-valves V1, V3, V51, switching valve V4, V7 are closed, with this implementation Mode in the same manner, can supply the air (AH+AL+AL) collaborated in air supply unit 30K to bubble blowing unit 21.

Low-pressure air supply unit 40 and air supply unit 30K can also be made while worked, using air supply unit 30K for The air (AH+AL+AL) at the supply of bubble blowing unit 21 interflow and low-pressure air AL2 this two side.

It is multiple by the way that injector body 31 is connected in series according to above-mentioned tenth embodiment, and can make more low Air AL and pressure-air AH is pressed to collaborate.Therefore, it is possible to further increase the air mass flow supplied to bubble blowing unit 21.

In the present embodiment, as air supply unit 30K, with illustrating two benches feelings of in-line educator main body 31 Condition, as long as but be connected in series the number of injector body 31 to be multiple, however it is not limited to two benches.For example, it is also possible to go here and there Connection three the injector body 31 more than stage of connection.

(the 11st embodiment)

Next, being based on accompanying drawing, the frictional resistance of the air lubrication formula ship of the 11st embodiment of the present invention is dropped Low device, ship illustrate.In the 11st embodiment, for the first to the tenth embodiment identical part, Mark identical reference illustrates, and omits repeat specification.

Figure 11 is that the frictional resistance for the air lubrication formula ship for representing present embodiment reduces device, the overall structure of ship Schematic diagram.

As shown in figure 11, the ship 10 of present embodiment, which possesses frictional resistance, reduces device 20L.Frictional resistance reduces device 20L possesses bubble blowing unit 21, bubble recoverer 25, air supply unit 30L, low-pressure air supply unit 40.

Air supply unit 30L possesses injector body 31, gasing tank 60.Suction inlet 32 is connected with injector body 31.

Identically with the respective embodiments described above, injector body 31 has the stream 31r of taper.In injector body 31 First end 31a is connected with pressure-air supplying tubing 35, and air supply is connected with the second end 31b of injector body 31 Pipe 22.The pressure-air supplying tubing 35 of present embodiment is connected to the discharge side of booster 14, by what is discharged from booster 14 A part for compressed air is sent into as pressure-air AH to the first end 31a of injector body 31.

Low-pressure air supplying tubing 39 is connected with the first end 32a of suction inlet 32.The low-pressure air of present embodiment Supplying tubing 39 is connected to bubble recoverer 25, and the air obtained from the bubble reclaimed by bubble recoverer 25 is used as low pressure sky Gas AL is taken into air to suction inlet 32.

Gasing tank 60 is arranged on the pars intermedia of pressure-air supplying tubing 35.It can accumulate in the gasing tank 60 a certain amount of The pressure-air AH passed through in pressure-air supplying tubing 35.That is, pressure-air AH is passing through pressure-air supplying tubing 35 midway, gasing tank 60 is temporarily lodged in, then, the first end via pressure-air supplying tubing 35 to injector body 31 Portion 31a is sent into.

In pressure-air supplying tubing 35, flow is provided with a manner of it can be opened and closed in the downstream of gasing tank 60 and is adjusted Valve V8.The pressure-air AH of flow corresponding with flow rate regulating valve V8 aperture supplies from gasing tank 60 to injector body 31 Give.That is, by flow rate regulating valve V8, the pressure-air AH inflated to gasing tank 60 aeration quantity can be adjusted.

In air supply unit 30L, beaten when the state closed since switching valve V4, flow rate regulating valve V8, check-valves V5 When opening switching valve V4, the pressure-air AH after being compressed from booster 14 is filled by pressure-air supplying tubing 35 to gasing tank 60 Gas.Next, open flow rate regulating valve V8, and then when opening check-valves V1, pressure-air AH's after being compressed by booster 14 A part is sent into from gasing tank 60 by pressure-air supplying tubing 35 to the stream 31r of injector body 31.Sent to stream 31r The pressure-air AH entered flow velocitys in injector body 31 are gradually risen, and negative pressure is produced in stream 31r.Pressure-air AH is in height The midway of pressure air supplying tubing 35 temporarily lodges in gasing tank 60.By so lodging in gasing tank 60, high pressure sky can be reduced Gas AH pulsation.

Next, open check-valves V5.Then, due to the negative pressure in injector body 31, reclaimed by bubble recoverer 25 Air to be low-pressure air AL flow into from the first end 32a of suction inlet 32.The low-pressure air AL quilts being flowed into stream 32r Introduce into the stream 31r of injector body 31, collaborate in stream 31r with pressure-air AH, from the of injector body 31 Two end 31b are sent out.Supplied accordingly, for bubble blowing unit 21 obtained from adding low-pressure air AL in pressure-air AH Air.

The frictional resistance, which reduces device 20L, can make air supply unit 30L and low-pressure air supply unit 40 alternatively work And air is supplied to bubble blowing unit 21.Thus, for example, in the case of shallower draft, low-pressure air supply unit can be passed through 40 supply low-pressure air AL2 to bubble blowing unit 21, in the case where absorbing water relatively depth, can be incited somebody to action by air supply unit 30L Pressure-air AH and low-pressure air AL supply to bubble blowing unit 21.By making low-pressure air supply unit 40 and air supply unit 30L works simultaneously, can supply pressure-air AH, low-pressure air AL and low-pressure air AL2 to bubble blowing unit 21 simultaneously.

According to above-mentioned 11st embodiment, especially make the pressure-air AH to the supply of injector body 31 via inflation Tank 60, therefore the influence of pressure-air AH pulsation caused by the outlet side in booster 14 can be suppressed.Accordingly, for injection Device main body 31, can be with stable flow supply pressure-air AH.As a result, in injector body 31, low pressure can be made empty Gas AL stably collaborates with pressure-air AH, and can stably produce bubble from bubble blowing unit 21.

(the 12nd embodiment)

Next, being based on accompanying drawing, the frictional resistance of the air lubrication formula ship of the 12nd embodiment of the present invention is dropped Low device, ship illustrate.In the 12nd embodiment, for the first~the 5th embodiment identical part, Mark identical reference illustrates, and omits repeat specification.

Figure 12 is that the frictional resistance for the air lubrication formula ship for representing present embodiment reduces device, the overall structure of ship Schematic diagram.

As shown in figure 12, the ship 10 of present embodiment, which possesses frictional resistance, reduces device 20M.Frictional resistance reduces device 20M possesses bubble blowing unit 21, bubble recoverer 25, air supply unit 30M.

Air supply unit 30M possesses injector body 31, gasing tank 70.

Identically with the respective embodiments described above, injector body 31 has the stream 31r of taper.In injector body 31 First end 31a is connected with pressure-air supplying tubing 35, and is connected with air in the second end 31b of injector body 31 and supplies To pipe 22.The pressure-air supply source 37 such as with turbo-compressor of pressure-air supplying tubing 35 of present embodiment is connected.

Gasing tank 70 is arranged on the pars intermedia of pressure-air supplying tubing 35, the phase of gasing tank 60 with the 11st embodiment With ground, a certain amount of pressure-air AH passed through in pressure-air supplying tubing 35 can be accumulated.That is, supplied by pressure-air Source 37 compress after pressure-air AH in the midway by pressure-air supplying tubing 35, temporarily lodge in gasing tank 70, then, It is sent into the first end 31a of injector body 31.

Low-pressure air supplying tubing 39 is connected with the first end 32a of suction inlet 32.The low-pressure air of present embodiment Supplying tubing 39 is connected to bubble recoverer 25, and the air obtained from the bubble reclaimed by bubble recoverer 25 is used as low pressure sky Gas AL is taken into suction inlet 32.

In pressure-air supplying tubing 35, flow is provided with a manner of it can be opened and closed in the downstream of gasing tank 70 and is adjusted Valve V9.Flow rate regulating valve V9 has the function identical with flow rate regulating valve V8 for above-mentioned gasing tank 60 for gasing tank 70 Function.

In air supply unit 30M, since the state that check-valves V1, V5, flow rate regulating valve V9 are closed, make pressure-air Supply source 37 starts.Then, the pressure-air AH after being pressurizeed from pressure-air supply source 37 inflates to gasing tank 70.Next, When opening flow rate regulating valve V9, the pressure-air AH for aerating gasing tank 70 is sent into the stream 31r of injector body 31.By This, check-valves V1 is opened.By accumulating pressure-air AH so in gasing tank 70, pressure-air AH pulsation can be reduced.

The pressure-air AH being sent into stream 31r flow velocitys in injector body 31 gradually rise, and are produced in stream 31r Negative pressure.Then, check-valves V5 is opened by the negative pressure in injector body 31, and the sky reclaimed by bubble recoverer 25 Gas is that low-pressure air AL flows into from the first end 32a of suction inlet 32.Low-pressure air AL in stream 32r is flowed into by spray Introduce, collaborate in stream 31r with pressure-air AH, from the second end of injector body 31 in the stream 31r of emitter main body 31 Portion 31b is sent out.Sky obtained from low-pressure air AL is added in pressure-air AH is supplied accordingly, for bubble blowing unit 21 Gas.

According to above-mentioned 12nd embodiment, to the pressure-air AH that injector body 31 supplies by gasing tank 70, because This can suppress caused along with the work of the pressure-air such as compressor supply source 37 identically with the 11st embodiment Pressure-air AH pulsation.As a result, it can stably produce bubble from bubble blowing unit 21.

(other variations)

The present invention is not limited to the respective embodiments described above, without departing from the spirit and scope of the invention, also includes to upper State the structure that embodiment adds various changes.That is, the specific shape enumerated in embodiments, structure etc. are only One, can suitably it change.

For example, structure disclosed in the respective embodiments described above can be with appropriately combined.

Industrial utilizability

The present invention can be applied to air is sprayed around hull come reduce above-mentioned hull and around water between produce Frictional resistance air lubrication formula ship frictional resistance reduce device.Device is reduced according to the frictional resistance, can be suppressed The increase of parts count simultaneously ensures required air mass flow, can obtain sufficient energy-saving effect, CO₂Discharge rate cuts down effect.

Description of reference numerals

10 ships (air lubrication formula ship)

11 hulls

11b hull bottom

11f bows portion

11r quarters

12 propellers

12s rotary shafts

13 main frames

14 boosters (pressure-air supply source, subsidiary engine)

20A, 20B, 20C, 20D, 20E, 20F, 20G, 20H, 20J, 20K, 20L, 20M friction reduce device

21 bubble blowing units

22 air supply pipes

25 bubble recoverers

30A, 30C, 30D, 30E, 30F, 30G, 30H, 30J, 30K, 30L, 30M air supply unit

31st, 31A, 31B injector body (injector)

31a first ends

31b the second ends

31r streams

32 suction inlets

32a first ends

32b the second ends

32r streams

35 pressure-air supplying tubings

37 pressure-air supply sources

38 low-pressure air supply sources

39 low-pressure air supplying tubings

39a branched pipes

39b branched pipes

40 low-pressure air supply units (air boosting section)

41 air introduction pipes

41a first ends

41b the second ends

42 air blowers

43 air supply pipes

49 connecting tubes

60th, 70 gasing tank

61 air introduction pipes

62 air blowers

AH pressure-airs

AL low-pressure airs

AL2 low-pressure airs

L water lines

V1 check-valves

V2 switching valves

V3 check-valves

V4 switching valves

V4 ' switching valves

V5 check-valves

V6 switching valves

V7 switching valves

V8 flow rate regulating valves

V9 flow rate regulating valves

V51 check-valves

Claims

1. the frictional resistance of air lubrication formula ship a kind of reduces device, to hull around spray air to reduce in the hull The caused frictional resistance between the water of surrounding,

The frictional resistance of the air lubrication formula ship, which reduces device, to be possessed：

Injector, there is the stream for the pressure-air flowing from the supply of pressure-air supply source, and introduced into the stream Pressure is less than the low-pressure air of the pressure-air；And

Bubble blowing unit, sprayed by the pressure-air that will be discharged from the injector and the low-pressure air, and in institute State and bubble is produced around hull.

2. the frictional resistance of air lubrication formula ship according to claim 1 reduces device, wherein,

The stream is from upstream side towards downstream and flow path cross sectional area is gradually reduced.

3. the frictional resistance of air lubrication formula ship according to claim 1 or 2 reduces device, wherein,

The pressure-air supply source is the main frame for promoting the hull or the subsidiary engine supplied to the main frame.

4. the frictional resistance of air lubrication formula ship according to claim 1 or 2 reduces device, wherein,

The pressure-air supply source is the compressor being compressed to air.

5. device is reduced according to the frictional resistance of air lubrication formula ship according to any one of claims 1 to 4, wherein,

The frictional resistance of the air lubrication formula ship reduces device and is also equipped with described in recovery from bubble blowing unit ejection The bubble recoverer of bubble,

The low-pressure air is the bubble reclaimed by the bubble recoverer and is taken into from air and is compressed by air blower Air afterwards.

6. device is reduced according to the frictional resistance of air lubrication formula ship according to any one of claims 1 to 4, wherein,

The low-pressure air obtains from the bubble reclaimed by the bubble recoverer.

7. device is reduced according to the frictional resistance of air lubrication formula ship according to any one of claims 1 to 4, wherein,

The low-pressure air is the air being taken into from air.

8. device is reduced according to the frictional resistance of air lubrication formula ship according to any one of claims 1 to 4, wherein,

The low-pressure air is the air after being compressed by air blower to the air being taken into from air.

9. the frictional resistance of air lubrication formula ship according to claim 4 reduces device, wherein,

The frictional resistance of the air lubrication formula ship reduce device possess combustion air is compressed and to making the ship The booster for the main frame supply that body promotes, the low-pressure air is by the air after the compressed.

10. device is reduced according to the frictional resistance of air lubrication formula ship according to any one of claims 1 to 9, wherein,

The frictional resistance of the air lubrication formula ship reduce device be also equipped with being compressed the air being taken into from air and to The air boosting section of the bubble blowing unit supply,

The frictional resistance of the air lubrication formula ship reduces device can be alternatively from the air boosting section and the injection At least one party in device supplies air to the bubble blowing unit.

11. device is reduced according to the frictional resistance of air lubrication formula ship according to any one of claims 1 to 10, wherein,

The frictional resistance of the air lubrication formula ship reduces device and is also equipped with temporarily accumulating institute in the upstream side of the injector State the gasing tank of pressure-air.

12. a kind of ship, the frictional resistance for possessing the air lubrication formula ship any one of claim 1~11 reduces dress Put.