CN107089313B - Propeller and ship with low profile catheter - Google Patents
Propeller and ship with low profile catheter Download PDFInfo
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- CN107089313B CN107089313B CN201610857291.5A CN201610857291A CN107089313B CN 107089313 B CN107089313 B CN 107089313B CN 201610857291 A CN201610857291 A CN 201610857291A CN 107089313 B CN107089313 B CN 107089313B
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- Prior art keywords
- propeller
- conduit
- diameter
- low profile
- profile catheter
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H5/00—Arrangements on vessels of propulsion elements directly acting on water
- B63H5/07—Arrangements on vessels of propulsion elements directly acting on water of propellers
- B63H5/16—Arrangements on vessels of propulsion elements directly acting on water of propellers characterised by being mounted in recesses; with stationary water-guiding elements; Means to prevent fouling of the propeller, e.g. guards, cages or screens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H1/00—Propulsive elements directly acting on water
- B63H1/02—Propulsive elements directly acting on water of rotary type
- B63H1/12—Propulsive elements directly acting on water of rotary type with rotation axis substantially in propulsive direction
- B63H1/14—Propellers
- B63H1/26—Blades
Abstract
Propeller with low profile catheter of the invention is characterized in that, propeller (10) with the stern for being installed on hull (1) and be installed on propeller (10) front conduit (20), the diameter (Ddin) of conduit (20) is 20% or more 50% or less the diameter (Dp) of propeller (10), the screw pitch (H) of propeller (10) is the blade root in propeller as maximum value, become the decreasing pitch of reduction on the direction radius (R) of minimum value in blade tip portion, the energy saver of feature as the two for having both large-scale conduit and medium-sized conduit, in working hard in shape for propeller (10), low profile catheter (20) are configured close to the front of propeller (10), thus, in the increased practical sea area of degree of loading, inhibit cavitation erosion, and it utilizes and low profile catheter (20 ) interference make control efficiency propeller (10) the direction radius (R) load distribution optimize.
Description
(the application be the applying date be on July 26th, 2012, entitled " propeller and ship with low profile catheter "
The divisional application of application for a patent for invention 201280037120.8)
Technical field
The present invention relates to the conduits of a kind of propeller with the stern for being installed on hull and the front for being installed on propeller
The propeller with low profile catheter and have the ship of the propeller with low profile catheter.
Background technique
In the conduit being set near existing propeller, the diameter with covering propeller type is bigger than propeller
Large-scale conduit and more smaller than airscrew diameter and be configured at the medium-sized conduit in front of propeller.
The large-scale conduit of covering propeller type, being referred to as, ducted propeller and propeller one degree of loading is high
In the case where be used as effective propeller.The reason for this is that the interference of propeller and conduit is big, it will be considered that the property of the interference
It can be reasonable as propeller.
On the other hand, the smaller medium-sized conduit of ratio airscrew diameter in front of propeller is used as energy saver, will
It is regarded as propeller.The reason for this is that the interference of conduit and propeller and little, the interference of hull and conduit is big instead.
Therefore, in the performance test of medium-sized conduit, implement resistance test in the state that conduit is equipped in hull.It should
It tests based on the such understanding of a part that conduit is hull.
The interference of large-scale conduit and propeller is big, and therefore, efficiency improves in the increased practical sea area of degree of loading, but in spiral shell
The cavitation erosion occurred between rotation paddle and conduit becomes problem, is hardly used in argosy.
About medium-sized conduit, it has been proposed that the structure shown in patent document 1 to patent document 7.
Patent Document 1 discloses the diameter conduits smaller than airscrew diameter, and disclosing cross sectional shape is inwardly
The conduit of convex convex form.
In addition, Patent Document 2 discloses a kind of conduit, to be led with the diameter of airscrew diameter same degree
Pipe, also close to the concept of large-scale conduit, the shape from laterally is the conduit of non-axisymmetric shape, but the section shape of conduit
Shape is increased using convex form convex inwardly, the standout of convex form in the upstream side of conduit.
In addition, in patent document 3, the conduit that a kind of shape when side viewing is non-axisymmetric shape is disclosed, is led
The diameter of pipe rear end is the 50% to 80% of airscrew diameter, the horizontal distance in rear end of conduit face and propeller periphery top end part
It is the 10% to 30% of airscrew diameter.
In addition, disclosing one kind shape when side viewing is non-axis symmetry shape in patent document 4 into patent document 7
The conduit of shape, the diameter conduit smaller than airscrew diameter.
In addition, in patent document 7, discloses a kind of screw pitch and slightly increase in the blade root of propeller, subtract in central portion
Less, in blade tip portion increased propulsion device again.
Existing technical literature
Patent document
Patent document 1: Japanese Unexamined Patent Publication 9-175488 bulletin
Patent document 2: the real public clear 56-32396 bulletin of Japan
Patent document 3: Japan is real be willing to specification appended by flat No. 2-20180 (Beneficial 3-17996) application and
Shoot the fiche (Japanese Patent Room distribution on 2 21st, 1991) of accompanying drawing content
Patent document 4: Japanese Unexamined Patent Publication 2008-143488 bulletin
Patent document 5: Japanese Unexamined Patent Publication 2007-331549 bulletin
Patent document 6: Japanese Unexamined Patent Publication 2002-220089 bulletin
Patent document 7: Japanese Unexamined Patent Publication 10-264890 bulletin
Summary of the invention
Invention technical problem to be solved
But the interference for being set to medium-sized conduit and propeller in front of propeller is weak, therefore, propeller load because
Stormy waves and in increased practical sea area, can not excessively expect the effect such as the ducted propeller of front.
In addition, the medium-sized conduit disclosed in each patent document does not utilize the interference with low profile catheter to make control efficiency
Propeller radial direction load distribution optimize.In addition, can expect the large-scale conduit interfered, there are cavitation problems, difficult
To be used in the big argosy of airscrew diameter.
In addition, in patent document 7, increase the screw pitch in the blade tip portion of propeller, and therefore, in the blade tip portion of propeller, gas
Erosion increases.
Therefore, it is an object of the present invention to as the energy saver for having both both large-scale conduit and medium-sized conduit feature,
It works hard on airfoil shape, low profile catheter is configured close to the front of propeller, then, in the increased practical sea area of degree of loading
In, it is able to suppress cavitation erosion, and utilization and the interference of low profile catheter make the load point of the radial direction of the propeller of control efficiency
Cloth optimizes.
For solving the technical solution of technical problem
It is recording in the corresponding propeller with low profile catheter with first aspect comprising: being installed on hull
Stern propeller；With the conduit in the front for being installed on propeller, the diameter of conduit is 20% or more of the diameter of propeller
50% hereinafter, propeller screw pitch be propeller blade root become maximum value, blade tip portion become minimum value in radius
The decreasing pitch of reduction on direction.The present invention according to first aspect combines conduit with the propeller of decreasing pitch, makes
The diameter of conduit is 20% or more 50% of the diameter of propeller hereinafter, thus not cavitating, and conduit can be made close to spiral
Paddle makes the screw pitch decreasing pitch of propeller, as a result, in the degree of loading of propeller because of stormy waves in increased practical sea area, energy
The inhalant effect for enough improving propeller center portion, can utilize the interference with conduit to make the radial direction of propeller of control efficiency
Load distribution optimize.In addition, make airscrew pitch in the blade root maximum value of propeller, in blade tip portion be minimum value,
The cavitation erosion that thereby, it is possible to inhibit to occur in screw blade taper.In addition, being spiral according to the present invention that first aspect is recorded
20% or more 50% conduit below of the diameter of paddle, therefore, small-size light-weight and frictional resistance is small, low vibration, low noise, it is low at
This, can be improved the efficiency of propeller.
Second aspect record it is a feature of the present invention that first aspect record the propeller with low profile catheter in,
The maximum value of screw pitch is 120% or more 160% or less the minimum value of screw pitch.It, can according to the present invention that second aspect is recorded
The inhalant effect for improving propeller center portion, to form optimal load distribution.
It is that the third aspect is recorded it is a feature of the present invention that first aspect or second aspect record with low profile catheter
In propeller, the up-front distance of the rear end of conduit and propeller is the diameter of propeller 0.5% or more less than 10%.According to
The present invention that the third aspect is recorded, it is not peeling-off using the inhalant effect of the propeller of decreasing pitch, conduit and spiral shell can be made
It is close to revolve paddle, and can be improved the interference effect of conduit and propeller.
It is that fourth aspect is recorded it is a feature of the present invention that first aspect to the third aspect record with low profile catheter
In propeller, the cross sectional shape of conduit is convex form convex inwardly, and the standout of convex form increases in the upstream side of conduit, makes
Camber ratio is 6% or more 16% or less.According to fourth aspect record the present invention, even if camber ratio 6% or more 16% hereinafter,
It is also not peeling-off using the inhalant effect in propeller center portion, the liter for promoting hull forwards as component can be increased
Power.
It is that 5th aspect is recorded it is a feature of the present invention that first aspect to fourth aspect record with low profile catheter
In propeller, conduit is the interior diameter in the downstream side accelerating type conduit smaller than the interior diameter of upstream side.It is recorded according to the 5th aspect
The present invention, the liter that the inhalant effect in propeller center portion can be further increased and promote hull forwards as component
Power.
It is that 6th aspect is recorded it is a feature of the present invention that first aspect to the 5th aspect record with low profile catheter
In propeller, keep the center of conduit consistent with the axle center of propeller.According to the present invention that the 6th aspect is recorded, with non-axis symmetry shape
The conduit of shape and by propeller shaft compared with the central axis of conduit is staggered the conduit that is arranged in a manner of with inclination angle, can
Production is provided and setting is easy and cheap conduit.
It is that 7th aspect is recorded it is a feature of the present invention that first aspect to the 6th aspect record with low profile catheter
In propeller, conduit is installed on the stern tube of hull via pillar or covers the hull end of stern tube.According to the 7th aspect note
The present invention of load can obtain fluid from entire front, improve the interference with propeller to improve efficiency, and can be easy
The addition of ground progress propeller.
It is that eighth aspect is recorded it is a feature of the present invention that first aspect to the 7th aspect record with low profile catheter
In propeller, in the fixed-wing that there is the inner surface of conduit the fluid for making to flow to propeller to form adverse current.Remembered according to eighth aspect
The present invention of load, the fluid in inflow catheter flow into propeller as adverse current by fixed-wing, and propeller efficiency is further as a result,
It improves.
9th aspect record it is a feature of the present invention that eighth aspect record the propeller with low profile catheter in,
Pillar doubles as being fixed-wing, and pillar distorts in the direction opposite with the direction of rotation of propeller.The sheet recorded according to the 9th aspect
Invention is formed using pillar and is vortexed, and pillar can be simplified structure as being fixed-wing as a result,.
In ship corresponding with the tenth aspect record, which is characterized in that appoint equipped with first aspect into the 9th aspect
The propeller with low profile catheter of one record.According to the present invention that the tenth aspect is recorded, in the increased practical sea area of degree of loading
In, it is capable of providing the high ship of propeller efficiency.
Invention effect
Propeller according to the present invention with low profile catheter combines conduit with the propeller of decreasing pitch, is achieved in
The miniaturization of conduit, makes 20% or more 50% of the diameter of the diameter propeller of conduit hereinafter, thus not cavitating, can
Make conduit close to propeller.Therefore, make the screw pitch decreasing pitch of propeller, as a result, in the degree of loading of propeller due to stormy waves
In increased practical sea area, the inhalant effect in propeller center portion can be improved, the interference with conduit can be utilized to imitate control
The load distribution of the radial direction of the propeller of rate optimizes.In addition, keeping airscrew pitch maximum in the blade root of propeller
It is worth, is minimum value, the cavitation erosion that thereby, it is possible to inhibit to occur in screw blade taper in blade tip portion.
In addition, the propeller according to the present invention with low profile catheter, be 20% or more 50% of the diameter of propeller with
Under conduit, therefore, small-size light-weight and frictional resistance is small, low vibration, low noise, low cost can be improved the efficiency of propeller.
In addition, screw pitch maximum value be screw pitch minimum value 120% or more 160% situation below under, Neng Gouti
The inhalant effect in high propeller center portion, forms optimal load distribution.
In addition, being airscrew diameter 0.5% or more less than 10% in the rear end of conduit and the up-front distance of propeller
In the case where, it is not peeling-off using the inhalant effect of the propeller of decreasing pitch, conduit can be made close to propeller, and
It can be improved the interference effect of conduit and propeller.
In addition, the cross sectional shape in conduit is convex form convex inwardly, the standout of convex form is in the upstream side of conduit
Increase, makes in the situation below of camber ratio 6% or more 16%, even if making camber ratio 6% or more 16% hereinafter, using spiral
The inhalant effect of paddle central part, it is also not peeling-off, the lift for promoting hull forwards as component can be increased.
In addition, in the case where the interior diameter that conduit the is downstream side accelerating type conduit smaller than the interior diameter of upstream side, energy
The lift for enough further increasing the inhalant effect in propeller center portion and promoting hull forwards as component.
In addition, under the axle center unanimous circumstances at the center and propeller that make conduit, with the conduit of non-axisymmetric shape and
By propeller shaft compared with the central axis of conduit is staggered the conduit that is arranged in a manner of with inclination angle, it is capable of providing production and sets
Set easy and cheap conduit.
In addition, in the case where conduit is installed on the stern tube of hull or covers the hull end of stern tube via pillar,
Fluid, enhancing and the interference of propeller can be obtained from entire front and realize that efficiency improves, and can be easy to carry out conduit
Addition.
In addition, in the case where there is the inner surface of conduit the fluid for making to flow to propeller to form the fixed-wing of adverse current, stream
The fluid for entering conduit flows into propeller as adverse current by fixed-wing, and propeller efficiency further increases as a result,.
In addition, pillar doubles as being fixed-wing, pillar in the case where the direction opposite with the direction of rotation of propeller distorts,
It is formed and is vortexed using pillar, pillar can double as being fixed-wing as a result, and simplify structure.
Ship according to the present invention is capable of providing propeller efficiency height especially in the increased practical sea area of degree of loading
Ship.
Detailed description of the invention
Fig. 1 is the schematic structural diagram of the ship of the propeller with low profile catheter equipped with embodiments of the present invention.
Fig. 2 be the major part for indicating the propeller with low profile catheter for the ship a part of section side view and
Section A-A figure.
Fig. 3 is a part of section knot for indicating the major part of other propellers with low profile catheter for the ship
Composition.
Fig. 4 is the chart for indicating the screw pitch distribution of the decreasing pitch propeller and conventional propeller.
Fig. 5 is the chart for indicating the velocity flow profile of the decreasing pitch propeller and conventional propeller.
Fig. 6 is the rear end of conduit indicated based in the propeller with low profile catheter and the flow velocity of the up-front distance of propeller
The chart of distribution.
Fig. 7 is the chart for indicating the degree of loading change test result of the ship's speed decline in simulated waves.
Fig. 8 is the chart for indicating the degree of loading change test result of the ship's speed decline in simulated waves.
Description of symbols
1 hull
1a hull end
10 propellers
10b stern tube
11 propeller hubs
20 conduits
20a, 20b, 20c, 20d pillar (fixed-wing)
Dp airscrew diameter
The diameter of Ddin catheter proximal end
The diameter of Ddout rear end of conduit
H screw pitch
L rear end of conduit and the up-front distance of propeller
Specific embodiment
In the following, the propeller with low profile catheter to embodiments of the present invention is illustrated.
Fig. 1 is the schematic structural diagram of the ship of the propeller with low profile catheter equipped with embodiments of the present invention, Fig. 2
It (a) is a part of section side view for indicating the major part of the propeller with low profile catheter for the ship, Fig. 2 (b) is
The Section A-A figure of the figure (a), Fig. 3 are one of the major part of other propellers with low profile catheter for the ship
Partial cross-section structure chart, Fig. 4 are the charts for indicating the screw pitch distribution of the decreasing pitch propeller and conventional propeller, and Fig. 5 is to indicate
The chart of the velocity flow profile of the decreasing pitch propeller and conventional propeller, Fig. 6 are the spirals indicated based on this with low profile catheter
The chart of the velocity flow profile of rear end of conduit and the up-front distance of propeller in paddle.
As shown in Figure 1, ship includes the propeller 10 for being installed on the stern of hull 1；With the front for being installed on propeller 10
Conduit 20.
As shown in Fig. 2 (a), propeller 10 has propeller hub 11 in central part, and conduit 20 is the rear end 22 as downstream side
The small accelerating type conduit of the interior diameter of front end 21 of the interior diameter than becoming upstream side.
Its cross sectional shape of conduit 20 is convex form 23 convex inwardly, and the standout of convex form 23 is in the upstream side of conduit 20
Greatly.The camber ratio of maximum camber position is 6% or more 16% or less.In general, when camber ratio is more than 8%, in conduit 20
It is interior peeling-off, but determining low profile catheter 20 is set in a manner of close to the front of propeller 10 in the present embodiment, make
The screw pitch of propeller 10 is the decreasing pitch of reduction in the radial direction, therefore, is imitated using the sucking of the central part of propeller 10
Fruit, it is also not peeling-off even more than 8%, lift can be increased.Like this, make 20 accelerating type conduit of conduit, make section shape
Shape is convex form convex inwardly, to improve camber ratio, thereby, it is possible to accelerate flow velocity, improves the interference with propeller 10,
Also, it can also enhance the lift for promoting hull 1 forwards as component.
If the diameter of propeller 10 is Dp, the diameter of the front end 21 of conduit 20 is Ddin, the diameter of the rear end 22 of conduit 20
When leading edge for Ddout, propeller 10 is L at a distance from the rear end of conduit 20 22, the preferred diameter of the front end 21 of conduit 20
Ddin is the 50% of the diameter Dp of propeller 10 hereinafter, the rear end 22 of conduit 20 and the up-front distance L of propeller 10 are spiral
The 15% of the diameter Dp of paddle 10 is hereinafter, be more preferably less than 10%.The rear end 22 of conduit 20 and propeller 10 it is up-front away from
From L preferably close to but in order to avoid the contact of conduit 20 and propeller 10, preferably the diameter Dp of propeller 10
0.5% or more.
The diameter Ddout of the rear end 22 of the diameter Ddin and conduit 20 of the front end 21 of conduit 20 is the diameter Dp of propeller 10
20% or more 50% or less.In 20% or more 50% range below of the diameter Dp of propeller 10, or conduit
The diameter Ddout of the rear end 22 of the diameter Ddin and conduit 20 of 20 front end 21 equal tubular.The front end 21 of conduit 20 it is straight
The more preferable Ddin > Ddout of the diameter Ddout of the rear end 22 of diameter Ddin and conduit 20.Additionally, it is preferred that the front end 21 of conduit 20
Diameter Ddin is 35% or more 50% of the diameter Dp of propeller 10 hereinafter, the diameter Ddout of the rear end 22 of conduit 20 is spiral
20% or more of the diameter Dp of paddle 10 is less than 40%.
Using 20% or more 50% conduit 20 below of the diameter Dp of propeller 10, as a result, small-size light-weight and friction resistance
Power is small, and low vibration, low noise, low cost can be improved the efficiency of propeller 10.
In addition, in order to improve interference effect, in addition, avoid increasing with the abutting of quarter and resistance, preferred conduit 20
Width W (length) is 20% or more 60% or less diameter Dp.Common ship is especially being widely used in including argosy
In terms of oceangoing ship, the width W of more preferable conduit 20 is 25% or more 50% or less of diameter Dp.
As shown in Fig. 2 (a), conduit 20 is formed as axisymmetric shape, so that the drive shaft 10a of propeller 10 and conduit 20
The consistent mode of central axis is installed, and therefore, is staggered with the conduit of non-axisymmetric shape and by the central axis of propeller shaft and conduit
The conduit being arranged in a manner of with inclination angle is compared, and is capable of providing production and setting is easy and cheap conduit.
As shown in Fig. 2 (b), conduit 20 is mounted on the hull end of covering stern tube 10b by pillar 20a, 20b, 20c, 20d
1a.Stern tube 10b is set to around the drive shaft 10a of propeller 10.In addition, for the ship for the form for exposing stern tube 10b
Oceangoing ship, conduit 20 can also be directly installed on stern tube 10b by pillar 20a, 20b, 20c, 20d.In addition, for making stern tube
The ship that 10b exposes part, conduit 20 can also be installed on stern tube 10b and hull end by pillar 20a, 20b, 20c, 20d
The two of 1a.
Conduit 20 is installed on to the stern tube 10b or covering stern tube of hull 1 via pillar 20a, 20b, 20c, 20d
The hull end 1a of 10b increases the interference with propeller 10 thereby, it is possible to obtain fluid from entire front to realize efficiency
It improves, and can be easy to carry out the addition of conduit 20.In existing ship in the case where additional installation conduit 20, advantage is obvious,
But it in the case where installation in new shipbuilding, does not need as before to process the outside plate of hull 1, therefore, it may have excellent
Point.
Pillar 20a, 20b, 20c, 20d radially are configured with respect to the central axis of conduit 20, especially by making pillar
Angle between 20a and pillar 20d is smaller than the angle between pillar 20b and pillar 20c, can improve wake distribution.
Pillar is minimum 2 preferred, 5 most, and pillar can also be arranged in the outside of conduit 20.
In addition, the diameter Ddout that the flowing path section of conduit 20 is configured to rear end 22 is narrower than the diameter Ddin of front end 21.Make to lead
The flowing path section of pipe 20 downstream goes to narrow, and thus, it is possible to improve wake distribution.For the flow path in the downstream side of constriction conduit 20
Section can also be such that the sectional area of pillar 20a, 20b, 20c, 20d downstream goes other than reducing the inner section of conduit 20
Increase.By improving wake distribution, the propeller effect of low profile catheter 20 can be further increased.
As shown in figure 3, the inner surface setting in conduit 20 has the pillar 20e distorted, can also make to flow to propeller 10
Fluid forms adverse current (Counter Flow).In such a situation it is preferred that the setting angle of the hull center line in hull side θ s
It is 5 degree to 25 degree, is 5 degree to 10 degree in the inner surface side θ d of conduit 20.The fluid of inflow catheter 20 from upstream side downstream
It goes to be accelerated, and by having the pillar 20e of distortion to form vortex in the direction opposite with the direction of rotation of propeller 10, as
Adverse current flows into propeller 10, further increases propeller efficiency as a result,.
In addition, pillar 20e is set to the outside of conduit 20, specially fluid shape can also be made in the inner surface setting of conduit 20
It at the fixed-wing of vortex, still, is formed and is vortexed using pillar 20e, pillar 20e can and be fixed-wing as a result, and make to construct
Simplify.
Fig. 4 indicates that the screw pitch of the decreasing pitch propeller and conventional propeller is distributed.
The radius of the propeller hub 11 of propeller 10 is r1, and blade root is radius r1 to radius r2.Radius R is 1/2Dp, and H is spiral shell
Away from.Blade root is 20% or more 40% or less the diameter Dp of propeller 10.
The screw pitch H of the propeller 10 of present embodiment be propeller 10 blade root become maximum value, blade tip portion at
For the decreasing pitch of reduction on the direction radius R of minimum value.Comparative example shown in Fig. 4 indicates fixed pitch.
The screw pitch H of the propeller 10 of present embodiment becomes maximum value in the blade root (from r1 to r2) of propeller 10
Hmax considers propulsive efficiency and inhibits the generation of cavitation erosion, makes 120% or more of the minimum value Hmin of maximum value Hmax screw pitch H
160% or less.
Fig. 5 indicates the propeller of the decreasing pitch of present embodiment shown in Fig. 4 and the conventional propeller as comparative example
Velocity flow profile.
V is the flow velocity of the inflow side of propeller 10, and Vx is the flow velocity of the outflow side of propeller 10, and V and Vx are axial
Flow velocity.
As shown in figure 5, in the present embodiment, compared with comparative example, r1/R velocity flow profile at 0.2 to 0.6 is improved.
That is, make 10 decreasing pitch of propeller in Fig. 5, the flow velocity of the immediate vicinity (blade root) of propeller 10 as a result,
Distribution is improved, therefore, it is intended that conduit 20 is also possible to the small low profile catheter 20 of diameter Ddin.By the way that conduit 20 can be made
Miniaturization, can increase the flow velocity of the blade root of propeller 10, the increase phase interaction with the screw pitch of the propeller 10 in blade root
With can be improved interference.In addition, the production that can be realized light weight and low cost is also beneficial to reduce because surface area is small
Frictional resistance.In addition, thus, it is possible to improve the stream of the blade root of the relatively slow propeller 10 of speed due to being low profile catheter 20
Therefore speed is able to suppress the generation of cavitation erosion, and can prevent the damage and vibration, the generation of noise of propeller 10.Also,
The screw pitch of propeller 10 be blade root become maximum value, blade tip portion become minimum value reduce in the radial direction successively decrease
Screw pitch, thus, it is also possible to inhibit the cavitation erosion occurred in the blade tip portion of propeller 10.
Fig. 6 indicate change the propeller with low profile catheter in conduit 20 rear end 22 and propeller 10 it is up-front away from
Velocity flow profile in the case where from L.
In 15% or less the diameter Dp of propeller 10, the interference of propeller 10 and conduit 20 shows obviously distance L,
Make 10% of distance L less than Dp, bigger influence is generated to the load distribution in the direction radius R of propeller 10 as a result,.In addition,
If keep distance L too long, abutted with hull 1.If making 10% of distance L less than Dp, can prevent from supporting with hull 1
It connects, can prevent from being difficult to obtain fluid from entire front.
Fig. 7 and the degree of loading declined Fig. 8 shows the ship's speed in simulated waves change test result.
Fig. 7 be indicate to make propeller leading edge and conduit rear end distance change in the case where and be not provided with the feelings of conduit
The chart of propulsive efficiency under condition, Fig. 8 be indicate to make propeller leading edge and conduit rear end distance change in the case where
The chart of thrust variation.
In this experiment, with Lpp (Length between Perpendiculars)=229m, B (beam)=42m, D (depth of ship)=
The pull-up oil carrier of the A Fu of 12.19m uses Lpp=4.8600m, the mould of B=0.8914m, D=0.2587m as subjects ship
Type ship.
In addition, subjects propeller for ship 10 be Dp (airscrew diameter)=7m, H/D (0.7R) (pitch position)=
0.67, EAR (developed area ratio)=0.45, Rake (leaf inclination)=- 216.7m, Z (number of sheets)=4, Boss Ratio (propeller hub
Than)=0.1586, Skew (camber of blade)=20deg, Dp=0.148559m, H/D (0.7R) is used as model propeller
=0.67, EAR=0.45, Rake=-4.6mm, Z=4, Boss Ratio=0.1586, Skew=20deg.
48%, the Ddout (diameter of rear end 22) that the Ddin (diameter of front end 21) of conduit 20 is Dp is the 40% of Dp, is led
Length (width) W of pipe 20 is the 24% of Dp, and conduit camber ratio is 8%.
In this experiment, for the ship's speed decline in simulated waves, ship's speed is reduced in the state that revolution is fixed, is made
Self-propulsion test is carried out in the state of propeller load degree increase.
In Fig. 7, abscissa indicates that ship's speed ratio, ordinate indicate propulsive efficiency, compares when ship's speed ratio being made to drop to 0.75
Propulsive efficiency.
Indicate the leading edge of propeller 10 in embodiment 1 in 22 distance L=Dp × 6% of the rear end of conduit 20, embodiment 2
L=Dp × 3%, L=Dp × 1% in embodiment 3, comparative example do not use conduit 20.
In embodiment 1 into embodiment 3, when ship's speed is than any number for 0.75 to 1, compared with comparative example, promote
Efficiency improves.
In fig. 8, abscissa is airscrew thrust, and ordinate is nozzle profile resistance (thrust), and comparing makes airscrew thrust exist
Thrust in the case where changing between 1.05 to 1.3.
Thrust increases embodiment 2 compared with Example 1, and thrust increases embodiment 3 compared with Example 2.
As shown in figure 8, the leading edge of propeller 10 and 22 distance L of the rear end of conduit 20 are smaller, thrust more increases.
The propeller with low profile catheter according to the present embodiment, in the propeller 10 with the stern for being installed on hull 1
In the propeller with low profile catheter of the conduit 20 in the front for being installed on propeller 10, by by conduit 20 and decreasing pitch
Propeller 10 combines, and can be realized the miniaturization of conduit 20, makes the diameter Dp's of the diameter Ddin propeller 10 of conduit 20
20% or more 50% hereinafter, do not cavitate, and conduit 20 can be made close to propeller 10.Therefore, make the screw pitch H of propeller 10
Become maximum value, the decreasing pitch in blade tip portion as the reduction in the radial direction of minimum value in the blade root of propeller 10,
In increased practical sea area, it can be improved the sucking effect of 10 central part of propeller because of stormy waves in the loading degree of propeller as a result,
Fruit, the load distribution that the interference with conduit 20 can be utilized to make the direction radius R of the propeller 10 of control efficiency optimize.Separately
Outside, make the screw pitch H of propeller 10 in the blade root maximum value of propeller 10, in blade tip portion be minimum value, thereby, it is possible to inhibit
In the cavitation erosion that the blade tip portion of propeller 10 generates, therefore, can reduce the reduction of propulsive efficiency, noise, vibration generation and
The damage of propeller 10.
In addition, the propeller with low profile catheter according to the present embodiment, be the 20% of the diameter Dp of propeller 10 with
Therefore upper 50% conduit 20 below increases the flow velocity of the blade root of propeller 10, the screw pitch with the propeller 10 of blade root
Increase interaction, so as to improve interference, can be improved the efficiency of propeller 10.In addition, can be realized small-size light-weight
And frictional resistance is small, the propeller 10 of low vibration, low noise, low cost.
In addition, the propeller with low profile catheter according to the present embodiment, by the maximum value Hmax screw pitch for making screw pitch H
120% or more 160% of the minimum value Hmin of H is hereinafter, be able to suppress the generation of cavitation erosion, moreover, can be improved propeller 10
The inhalant effect of central part can be improved propulsive efficiency to form optimal load distribution.
In addition, the propeller with low profile catheter according to the present embodiment, by the rear end 22 and the propeller that make conduit 20
10 up-front distance L is the diameter Dp of propeller 10 0.5% or more less than 10%, can prevent catheter proximal end 21 from contacting ship
The hull 1 of tail portion obtains fluid from the front of entire conduit 20, and the interference that can be improved conduit 20 and propeller 10 is imitated
Fruit.
In addition, the propeller with low profile catheter according to the present embodiment, by the diameter ratio for making 20 downstream side of conduit
The small accelerating type conduit of the diameter of upstream side, can be such that fluid accelerates, can further increase the suction of the central part of propeller 10
Enter effect.
In addition, the propeller with low profile catheter according to the present embodiment, by the center and the propeller 10 that make conduit 20
Axle center it is consistent, be capable of providing production and setting be easy and cheap conduit.
In addition, the propeller with low profile catheter according to the present embodiment, conduit 20 is via pillar 20a, 20b, 20c, 20d
Therefore the stern tube 10b for being installed in hull 1 or the hull end 1a for covering stern tube 10b can be obtained from entire front
Fluid, enhancing and the interference of propeller 10 can be easy to carry out to include the conduit 20 for having ship to realize that efficiency improves
Addition.
In addition, the propeller with low profile catheter according to the present embodiment, keeps the cross sectional shape of conduit 20 convex inwardly
Convex form 23, the standout of convex form 23 increases in the upstream side of conduit 20, and camber ratio is 6% or more 16% hereinafter, thus
Fluid can speed up in the slow upstream side of average speed, and be able to suppress resistance increase, further increase 10 center of propeller
The inhalant effect in portion.In this case, using inhalant effect, improve even if by camber ratio to 6% or more 16% hereinafter, do not send out
Raw removing, can increase the lift for promoting hull 1 forwards.
In addition, by the propeller with low profile catheter of equipment present embodiment, in the increased practical sea area of degree of loading, energy
Enough provide propeller efficiency high ship.
Industrial utilizability
Propeller according to the present invention with low profile catheter, small-size light-weight and frictional resistance is small are low vibration, low noise, low
Cost can be improved the efficiency of propeller, also, can be widely used in general ship including argosy.
Claims (8)
1. a kind of propeller with low profile catheter comprising:
It is installed on the propeller of the stern of hull；With
It is installed on the conduit in the front of the propeller,
The diameter of the conduit be the propeller diameter 20% or more 50% hereinafter,
The screw pitch of the propeller is 20% or more 40% of the diameter of the range of the blade root as the propeller
Become maximum value below, become the decreasing pitch of the reduction in the radial direction of minimum value in blade tip portion,
The up-front distance of the rear end of the conduit and the propeller be the diameter of the propeller 0.5% or more less than
10%,
The conduit is the interior diameter in the downstream side accelerating type conduit smaller than the interior diameter of upstream side.
2. a kind of propeller with low profile catheter comprising:
It is installed on the propeller of the stern of hull；With
It is installed on the conduit in the front of the propeller,
The diameter of the conduit be the propeller diameter 20% or more 50% hereinafter,
The screw pitch of the propeller is 20% or more 40% of the diameter of the range of the blade root as the propeller
Become maximum value below, become the decreasing pitch of the reduction in the radial direction of minimum value in blade tip portion,
The cross sectional shape of the conduit is convex form convex inwardly, and the standout of the convex form is in the upstream side of the conduit
Increase, make camber ratio 6% or more 16% hereinafter,
The conduit is the interior diameter in the downstream side accelerating type conduit smaller than the interior diameter of upstream side.
3. as claimed in claim 1 or 2 with the propeller of low profile catheter, it is characterised in that:
The maximum value of the screw pitch is 120% or more 160% or less the minimum value of the screw pitch.
4. as claimed in claim 1 or 2 with the propeller of low profile catheter, it is characterised in that:
Keep the center of the conduit consistent with the axle center of the propeller.
5. as claimed in claim 1 or 2 with the propeller of low profile catheter, it is characterised in that:
The conduit is installed on the stern tube of the hull or the hull end of the covering stern tube via pillar.
6. as claimed in claim 5 with the propeller of low profile catheter, it is characterised in that:
In the fixed-wing that there is the inner surface of the conduit fluid for making to flow to the propeller to form adverse current.
7. as claimed in claim 6 with the propeller of low profile catheter, it is characterised in that:
The pillar doubles as being the fixed-wing, and the pillar distorts in the direction opposite with the direction of rotation of the propeller.
8. a kind of ship, it is characterised in that:
Equipped with the propeller of any of claims 1 or 2 with low profile catheter.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011163203 | 2011-07-26 | ||
| JP2011-163203 | 2011-07-26 | ||
| CN201280037120.8A CN103717488B (en) | 2011-07-26 | 2012-07-26 | Propeller with low profile catheter and boats and ships |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201280037120.8A Division CN103717488B (en) | 2011-07-26 | 2012-07-26 | Propeller with low profile catheter and boats and ships |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107089313A CN107089313A (en) | 2017-08-25 |
| CN107089313B true CN107089313B (en) | 2019-05-17 |
Family
ID=47600800
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201280037120.8A Active CN103717488B (en) | 2011-07-26 | 2012-07-26 | Propeller with low profile catheter and boats and ships |
| CN201610857291.5A Active CN107089313B (en) | 2011-07-26 | 2012-07-26 | Propeller and ship with low profile catheter |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201280037120.8A Active CN103717488B (en) | 2011-07-26 | 2012-07-26 | Propeller with low profile catheter and boats and ships |
Country Status (5)
| Country | Link |
|---|---|
| EP (2) | EP2738084B1 (en) |
| JP (1) | JP5230852B1 (en) |
| KR (3) | KR102037018B1 (en) |
| CN (2) | CN103717488B (en) |
| WO (1) | WO2013014938A1 (en) |
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| KR102037018B1 (en) * | 2011-07-26 | 2019-11-26 | 고쿠리츠겐큐카이하츠호진 가이죠·고완·고쿠기쥬츠겐큐죠 | Propeller with small duct, and ship |
| WO2014115567A1 (en) * | 2013-01-25 | 2014-07-31 | 独立行政法人海上技術安全研究所 | Ship with small duct and method for assessing application of small duct on ship |
| JP6376679B2 (en) * | 2013-12-16 | 2018-08-22 | 国立研究開発法人 海上・港湾・航空技術研究所 | Stern duct, stern duct design method, and ship equipped with stern duct |
| CN104787284A (en) * | 2015-04-08 | 2015-07-22 | 浙江海洋学院 | Child-mother coaxial guide pipe wheel propeller |
| CN104828225A (en) * | 2015-05-14 | 2015-08-12 | 广西梧州运龙港船机械制造有限公司 | Marine propeller |
| KR102065866B1 (en) * | 2016-03-14 | 2020-02-11 | 재팬 마린 유나이티드 코포레이션 | Lift generator |
| CN109070982A (en) * | 2016-03-29 | 2018-12-21 | 日本日联海洋株式会社 | The propulsion device of ship |
| KR101894019B1 (en) * | 2017-01-12 | 2018-09-03 | 성동조선해양 주식회사 | Pre-swirl stator including annular structure |
| CN110920845B (en) * | 2019-11-14 | 2020-11-10 | 浙江大学 | Full-guide-pipe type two-stage pod propeller with C-shaped guide vanes |
| CN115140282A (en) * | 2022-05-31 | 2022-10-04 | 中国船舶重工集团公司第七一九研究所 | Anti-cavitation propeller and propulsion system |
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- 2012-07-26 KR KR1020147004953A patent/KR101917408B1/en active IP Right Grant
- 2012-07-26 CN CN201280037120.8A patent/CN103717488B/en active Active
- 2012-07-26 WO PCT/JP2012/004777 patent/WO2013014938A1/en unknown
- 2012-07-26 EP EP18215036.7A patent/EP3495257B1/en active Active
- 2012-07-26 CN CN201610857291.5A patent/CN107089313B/en active Active
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Also Published As
| Publication number | Publication date |
|---|---|
| EP3495257B1 (en) | 2020-04-15 |
| JP5230852B1 (en) | 2013-07-10 |
| EP3495257A1 (en) | 2019-06-12 |
| KR20190121878A (en) | 2019-10-28 |
| CN103717488A (en) | 2014-04-09 |
| KR102144840B1 (en) | 2020-08-14 |
| CN107089313A (en) | 2017-08-25 |
| KR102037018B1 (en) | 2019-11-26 |
| KR20140068034A (en) | 2014-06-05 |
| EP2738084B1 (en) | 2019-01-02 |
| KR20180089554A (en) | 2018-08-08 |
| EP2738084A1 (en) | 2014-06-04 |
| EP2738084A4 (en) | 2015-04-08 |
| WO2013014938A1 (en) | 2013-01-31 |
| JPWO2013014938A1 (en) | 2015-02-23 |
| CN103717488B (en) | 2016-10-26 |
| KR101917408B1 (en) | 2018-11-09 |
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