CN107089313A - Propeller and ship with low profile catheter - Google Patents
Propeller and ship with low profile catheter Download PDFInfo
- Publication number
- CN107089313A CN107089313A CN201610857291.5A CN201610857291A CN107089313A CN 107089313 A CN107089313 A CN 107089313A CN 201610857291 A CN201610857291 A CN 201610857291A CN 107089313 A CN107089313 A CN 107089313A
- Authority
- CN
- China
- Prior art keywords
- propeller
- conduit
- diameter
- low profile
- profile catheter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- 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
-
- 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
Abstract
The propeller with low profile catheter of the present invention is characterised by, 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 less than more than the 20% 50% of the diameter (Dp) of propeller (10), the pitch (H) of propeller (10) is the blade root in propeller as maximum, turn into the decreasing pitch of reduction on radius (R) direction of minimum value in blade tip portion, it is used as the energy saver for both features for having both large-scale conduit and medium-sized conduit, in making an effort in shape for propeller (10), close to the front configuration low profile catheter (20) of propeller (10), thus, in the increased actual marine site of degree of loading, suppress cavitation erosion, and optimize the load distribution in radius (R) direction of the propeller (10) of control efficiency using the interference with low profile catheter (20).
Description
(it is on July 26th, 2012, entitled " propeller and ship with low profile catheter " applying date that the application, which is,
The divisional application of application for a patent for invention 201280037120.8)
Technical field
The present invention relates to a kind of propeller of stern for having and being installed on hull and the conduit in the front for being installed on propeller
The propeller with low profile catheter and possess the ship of the propeller with low profile catheter.
Background technology
In the conduit being arranged 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, in degree of loading height referred to as ducted propeller, with propeller one
In the case of 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
Can be rational 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 on the contrary.
Therefore, in the performance test of medium-sized conduit, it is equipped with hull in the state of conduit and implements resistance test.Should
Test the such understanding of a part for hull based on conduit.
The interference of large-scale conduit and propeller is big, therefore, and efficiency is improved in the increased actual marine site of degree of loading, but in spiral shell
The cavitation erosion occurred between rotation oar and conduit turns into problem, is hardly used in argosy.
On medium-sized conduit, it has been proposed that in patent document 1 to the structure shown in patent document 7.
Patent Document 1 discloses the diameter conduit smaller than airscrew diameter, and it is to inner side to disclose cross sectional shape
The conduit of convex convex form.
In addition, Patent Document 2 discloses a kind of conduit, it is to be led with the diameter of airscrew diameter same degree
Pipe, also close to the concept of large-scale conduit, the conduit for being shaped as non-axis symmetry shape from laterally, but the section shape of conduit
Shape is used to the convex convex form in inner side, and the standout of convex form increases in the upstream side of conduit.
In addition, in patent document 3, disclosing a kind of conduit that non-axis symmetry shape is shaped as when side is watched, leading
The 50% to 80% of a diameter of airscrew diameter of pipe rearward end, rear end of conduit face and the horizontal range of propeller periphery top ends
For the 10% to 30% of airscrew diameter.
In addition, in patent document 4 into patent document 7, disclosing one kind and being shaped as non-axis symmetry shape when side is watched
The conduit of shape, the diameter conduit smaller than airscrew diameter.
In addition, in patent document 7, disclose a kind of pitch and somewhat increase in the blade root of propeller, subtract in central portion
Less, in blade tip portion increased propulsion plant again.
Prior art literature
Patent document
Patent document 1：Japanese Unexamined Patent Publication 9-175488 publications
Patent document 2：Japanese real public clear 56-32396 publications
Patent document 3：The Japanese real specification being willing to 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 publications
Patent document 5：Japanese Unexamined Patent Publication 2007-331549 publications
Patent document 6：Japanese Unexamined Patent Publication 2002-220089 publications
Patent document 7：Japanese Unexamined Patent Publication 10-264890 publications
The content of the invention
The technical problem solved is wanted in invention
But, the interference of the medium-sized conduit and propeller that are arranged in front of propeller is weak, therefore, propeller load because
Stormy waves and in increased actual marine site, can not excessively expect the effect such as ducted propeller above.
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 that the large-scale conduit of interference has cavitation erosion, it is difficult
To be used in the big argosy of airscrew diameter.
In addition, in patent document 7, increasing the pitch in the blade tip portion of propeller, therefore, in the blade tip portion of propeller, gas
Erosion increase.
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 features,
Made an effort on airfoil shape, low profile catheter is configured close to the front of propeller, then, in the increased actual marine site of degree of loading
In, cavitation erosion can be suppressed, and utilization and the interference of low profile catheter make the load point of the radial direction of the propeller of control efficiency
Cloth is optimized.
Technical scheme for solving technical problem
With in the corresponding propeller with low profile catheter of first aspect record, it is characterised in that have：It is installed on hull
Stern propeller；With the conduit in the front for being installed on propeller, more than the 20% of the diameter of a diameter of propeller of conduit
Less than 50%, the pitch of propeller be propeller blade root turn into maximum, turn into blade tip portion minimum value in radius
The decreasing pitch of reduction on direction.The present invention according to first aspect, conduit is combined with the propeller of decreasing pitch, made
Less than more than the 20% 50% of the diameter of a diameter of propeller of conduit, does not thus cavitate, and can make conduit close to spiral
Oar, the pitch for making propeller is decreasing pitch, thus, propeller degree of loading because of stormy waves in increased actual marine site, energy
The suction effect in propeller center portion is enough improved, the interference with conduit can be utilized to make the radial direction of propeller of control efficiency
Load distribution optimize.In addition, airscrew pitch is maximum, is minimum value in blade tip portion in the blade root of propeller,
Thereby, it is possible to suppress the cavitation erosion occurred in propeller blade taper.In addition, the present invention recorded according to first aspect, it is spiral
Less than more than 20% 50% conduit of the diameter of oar, therefore, small-size light-weight and frictional resistance is small, low vibration, low noise, it is low into
This, it is possible to increase 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 of pitch is less than more than the 120% 160% of the minimum value of pitch.The present invention recorded according to second aspect, can
The suction effect in propeller center portion is improved, so as 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 distance of the rear end of conduit and the leading edge of propeller is the diameter of propeller more than 0.5% less than 10%.According to
The present invention that the third aspect is recorded, it is not peeling-off using the suction effect of the propeller of decreasing pitch, conduit and spiral shell can be made
Revolve oar to approach, and the interference effect of conduit and propeller can be improved.
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 that, to the convex convex form in inner side, the standout of convex form increases in the upstream side of conduit, made
Camber ratio is less than more than 6% 16%.The present invention recorded according to fourth aspect, even if camber ratio is less than 16% more than 6%,
It is also not peeling-off using the suction effect in propeller center portion, by increasing capacitance it is possible to increase the liter for promoting hull forwards as component
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 accelerating type conduit smaller than the interior diameter of upstream side.Recorded according to the 5th aspect
The present invention, the liter that can further improve the suction effect in propeller center portion 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, make the center of conduit consistent with the axle center of propeller.The present invention recorded according to the 6th aspect, with non-axis symmetry shape
The conduit of shape and by propeller shaft compared with the central shaft of conduit staggers the conduit that is set in the way of with inclination angle, can
There is provided and make and set 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.Remembered according to the 7th aspect
The present invention of load, can obtain fluid from whole front, improve the interference with propeller to improve efficiency, and can be easy
Ground carries out the addition of 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, there is the fixed-wing for making the fluid for flowing to propeller formation adverse current in the inner surface of conduit.Remembered according to eighth aspect
Fluid in the present invention of load, inflow catheter is used as adverse current by fixed-wing and flows into propeller, and thus, propeller efficiency is further
Improve.
9th aspect record it is a feature of the present invention that eighth aspect record the propeller with low profile catheter in,
Pillar is doubled as being fixed-wing, and pillar is distorted in the direction opposite with the direction of rotation of propeller.The sheet recorded according to the 9th aspect
Invention, is vortexed using pillar formation, thus, and it is fixed-wing that pillar, which can be doubled as, simplifies structure.
With the tenth aspect the corresponding ship of records in, it is characterised in that be equipped with first aspect to the 9th aspect in times
The propeller with low profile catheter of one record.The present invention recorded according to the tenth aspect, in the increased actual marine site of degree of loading
In, using the teaching of the invention it is possible to provide the high ship of propeller efficiency.
Invention effect
According to the propeller with low profile catheter of the present invention, conduit is combined with the propeller of decreasing pitch, is achieved in
The miniaturization of conduit, makes less than more than the 20% 50% of the diameter of a diameter of propeller of conduit, does not thus cavitate, can
Make conduit close to propeller.Therefore, make propeller pitch be decreasing pitch, thus, propeller degree of loading because of stormy waves
In increased actual marine site, it is possible to increase the suction effect in propeller center portion, the interference with conduit can be utilized to imitate control
The load distribution of the radial direction of the propeller of rate is optimized.In addition, making airscrew pitch be maximum in the blade root of propeller
It is worth, is minimum value in blade tip portion, thereby, it is possible to suppress the cavitation erosion occurred in propeller blade taper.
In addition, according to the present invention the propeller with low profile catheter, its for propeller diameter more than 20% 50% with
Under conduit, therefore, small-size light-weight and frictional resistance is small, low vibration, low noise, low cost, it is possible to increase the efficiency of propeller.
In addition, pitch maximum for pitch minimum value less than more than 120% 160% in the case of, Neng Gouti
The suction effect in high propeller center portion, forms optimal load distribution.
In addition, the distance in the rear end of conduit and the leading edge of propeller is airscrew diameter more than 0.5% less than 10%
In the case of, it is not peeling-off using the suction effect of the propeller of decreasing pitch, conduit can be made close to propeller, and
The interference effect of conduit and propeller can be improved.
In addition, the cross sectional shape in conduit is that the standout of convex form is in the upstream side of conduit to the convex convex form in inner side
Increase, make camber ratio be less than more than 6% 16% in the case of, even if make camber ratio be less than more than 6% 16%, utilize spiral
The suction effect of oar central part, it is also not peeling-off, by increasing capacitance it is possible to increase the lift for promoting hull forwards as component.
In addition, in the case where conduit is the interior diameter in the downstream accelerating type conduit smaller than the interior diameter of upstream side, energy
Enough suction effects for further improving propeller center portion and the lift for promoting hull forwards as component.
In addition, make conduit center it is consistent with the axle center of propeller in the case of, with the conduit of non-axis symmetry shape and
By propeller shaft compared with the central shaft of conduit staggers the conduit that is set in the way of with inclination angle, using the teaching of the invention it is possible to provide make and set
Put easy and cheap conduit.
In addition, in the case where conduit is installed on the stern tube of hull via pillar or covers the hull end of stern tube,
Fluid, enhancing and the interference of propeller can be obtained from whole front and realize that efficiency is improved, and can easily carry out conduit
Addition.
In addition, in the case where the inner surface of conduit has the fixed-wing for making the fluid for flowing to propeller formation adverse current, stream
The fluid for entering conduit flows into propeller by fixed-wing as adverse current, and thus, propeller efficiency is further improved.
In addition, pillar doubles as being fixed-wing, in the case that pillar is distorted in the direction opposite with the direction of rotation of propeller,
It is vortexed using pillar formation, thus, it is fixed-wing that pillar, which can be doubled as, and simplifies structure.
According to the ship of the present invention, particularly in the increased actual marine site of degree of loading, using the teaching of the invention it is possible to provide propeller efficiency is high
Ship.
Brief description of the drawings
Fig. 1 is the summary construction diagram of the ship for the propeller with low profile catheter for being equipped with embodiments of the present invention.
Fig. 2 be the major part for representing 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 the major part for representing other propellers with low profile catheter for the ship
Composition.
Fig. 4 is the chart for the pitch distribution for representing the decreasing pitch propeller and conventional propeller.
Fig. 5 is the chart for the velocity flow profile for representing the decreasing pitch propeller and conventional propeller.
Fig. 6 is the flow velocity for representing the distance based on the rear end of conduit in the propeller with low profile catheter Yu propeller leading edge
The chart of distribution.
Fig. 7 is the chart for representing the degree of loading change result of the test that the ship's speed in simulated waves declines.
Fig. 8 is the chart for representing the degree of loading change result of the test that the ship's speed in simulated waves declines.
Description of reference numerals
1 hull
1a hulls end
10 propellers
10b stern tubes
11 propeller hubs
20 conduits
20a, 20b, 20c, 20d pillar (fixed-wing)
Dp airscrew diameters
The diameter of Ddin catheter proximal ends
The diameter of Ddout rear end of conduit
H pitch
L rear end of conduit and the distance of propeller leading edge
Embodiment
Below, the propeller with low profile catheter of embodiments of the present invention is illustrated.
Fig. 1 is the summary construction diagram of the ship for the propeller with low profile catheter for being equipped with embodiments of the present invention, Fig. 2
(a) be the major part for representing the propeller with low profile catheter for the ship a part of section side view, Fig. 2 (b) is
The Section A-A figure of the figure (a), Fig. 3 is one of the major part of other propellers with low profile catheter for the ship
Partial cross-section structure chart, Fig. 4 is the chart for the pitch distribution for representing the decreasing pitch propeller and conventional propeller, and Fig. 5 is to represent
The chart of the velocity flow profile of the decreasing pitch propeller and conventional propeller, Fig. 6 is to represent spiral with low profile catheter based on this
Rear end of conduit and the chart of the velocity flow profile of the distance of propeller leading edge in oar.
As shown in figure 1, ship has：It is installed on the propeller 10 of 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
The interior diameter accelerating type conduit smaller than the interior diameter of the front end 21 as upstream side.
Its cross sectional shape of conduit 20 is that the standout of convex form 23 is in the upstream side of conduit 20 to the convex convex form 23 in inner side
Greatly.The camber ratio of maximum camber position is less than more than 6% 16%.In general, when camber ratio is more than 8%, in conduit 20
It is interior peeling-off, but made in the present embodiment by setting the low profile catheter 20 of determination in the way of approaching the front of propeller 10
The pitch of propeller 10 is the decreasing pitch of reduction in the radial direction, therefore, is imitated using the suction of the central part of propeller 10
Really, it is also not peeling-off even more than 8%, by increasing capacitance it is possible to increase lift.Like this, it is accelerating type conduit to make conduit 20, makes section shape
Shape is, to the convex convex form in inner side, so as to improve camber ratio, thereby, it is possible to accelerate flow velocity, to improve the interference with propeller 10,
Also, it can also strengthen the lift for promoting hull 1 forwards as component.
If the diameter of the rear end 22 of a diameter of Ddin of the front end 21 of a diameter of Dp of propeller 10, conduit 20, conduit 20
When for the distance of Ddout, the leading edge of propeller 10 and conduit 20 rear end 22 being L, the preferred diameter of the front end 21 of conduit 20
Ddin is less than the 50% of the diameter Dp of propeller 10, and the rear end 22 of conduit 20 is spiral apart from L with the leading edge of propeller 10
Less than the 15% of the diameter Dp of oar 10, is more preferably less than 10%.The rear end 22 of conduit 20 and the leading edge of propeller 10 away from
From L preferably close to but in order to avoid the diameter Dp of contact of the conduit 20 with propeller 10, preferably propeller 10
More than 0.5%.
The diameter Ddin of the front end 21 of the conduit 20 and diameter Ddout of the rear end 22 of conduit 20 is the diameter Dp of propeller 10
Less than more than 20% 50%.In the diameter Dp of propeller 10 less than more than 20% 50% scope, or conduit
Tubular equal with the diameter Ddout of the rear end 22 of conduit 20 the diameter Ddin of 20 front end 21.The front end 21 of conduit 20 it is straight
The diameter Ddout of the rear end 22 of footpath Ddin and conduit 20 more preferably Ddin ＞ Ddout.Additionally, it is preferred that the front end 21 of conduit 20
Diameter Ddin is less than more than the 35% 50% of the diameter Dp of propeller 10, and the diameter Ddout of the rear end 22 of conduit 20 is spiral
More than the 20% of the diameter Dp of oar 10 is less than 40%.
Using the diameter Dp of propeller 10 less than more than 20% 50% conduit 20, thus, small-size light-weight and friction resistance
Power is small, low vibration, low noise, low cost, it is possible to increase the efficiency of propeller 10.
In addition, in order to improve interference effect, in addition, it is to avoid abutting and the resistance increase with quarter, preferably conduit 20
Width W (length) is less than more than the 20% 60% of diameter Dp.Common ship is particularly being widely used in including argosy
In terms of oceangoing ship, the more preferably width W of conduit 20 is less than more than the 25% 50% 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 shaft is installed, therefore, is staggered with the conduit of non-axis symmetry shape and by the central shaft of propeller shaft and conduit
The conduit set in the way of with inclination angle is compared, using the teaching of the invention it is possible to provide make and set easy and cheap conduit.
As shown in Fig. 2 (b), conduit 20 is arranged on covering stern tube 10b hull end by pillar 20a, 20b, 20c, 20d
1a.Stern tube 10b is arranged at around the drive shaft 10a of propeller 10.In addition, the ship for making form that stern tube 10b exposes
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
Both 1a.
Conduit 20 is installed on to the stern tube 10b or covering stern tube of hull 1 via pillar 20a, 20b, 20c, 20d
10b hull end 1a, thereby, it is possible to obtain fluid from whole front, increase and the interference of propeller 10 are so as to realize efficiency
Improve, and can easily carry out the addition of conduit 20.In existing ship in the case of additional installation conduit 20, advantage is obvious,
But in the case of being installed in new shipbuilding, it is not necessary to the outside plate of hull 1 is processed as before, therefore, it may have excellent
Point.
Pillar 20a, 20b, 20c, 20d radially are configured with respect to the central shaft 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.
Preferably minimum 2, most 5, pillar, pillar can also be set 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, thus, it is possible to improve wake distribution.For the stream in the downstream of constriction conduit 20
Section, in addition to reducing the inner section of conduit 20, can also making pillar 20a, 20b, 20c, 20d sectional area, downstream side is gone
Increase.It is distributed by improving wake, can further improves the propeller effect of low profile catheter 20.
As shown in figure 3, in pillar 20e of the inner surface setting with distortion of conduit 20, can also make to flow to propeller 10
Fluid formation adverse current (Counter Flow).In such a situation it is preferred that to the setting angle of the hull center line in hull side θ s
It it is 5 degree to 10 degree in the inner surface side θ d of conduit 20 for 5 degree to 25 degree.The fluid of inflow catheter 20 is from upstream side downstream side
Go to be accelerated, and vortex is formed in the direction opposite with the direction of rotation of propeller 10 by the pillar 20e with distortion, as
Adverse current flows into propeller 10, thus, further improves propeller efficiency.
In addition, pillar 20e is arranged at the outside of conduit 20, fluid shape specially can also be made in the inner surface setting of conduit 20
Into the fixed-wing of vortex, still, it is vortexed using pillar 20e formation, thus, pillar 20e can and be fixed-wing, and make construction
Simplify.
Fig. 4 represents that the 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 less than more than the 20% 40% of the diameter Dp of propeller 10.
The pitch H of the propeller 10 of present embodiment be propeller 10 blade root turn into maximum, blade tip portion into
For the decreasing pitch of reduction on radius R directions of minimum value.Comparative example shown in Fig. 4 represents fixed pitch.
The pitch H of the propeller 10 of present embodiment turns into maximum in the blade root (from r1 to r2) of propeller 10
Hmax, it is considered to propulsive efficiency and the generation for suppressing cavitation erosion, makes more than the 120% of the minimum value Hmin that maximum Hmax is pitch H
Less than 160%.
Fig. 5 represents the propeller and the conventional propeller as comparative example of the decreasing pitch of the present embodiment shown in Fig. 4
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 profiles at 0.2 to 0.6 are improved.
I.e., in Figure 5, it is decreasing pitch, thus, the flow velocity of the immediate vicinity (blade root) of propeller 10 to make propeller 10
Distribution is improved, therefore, it is intended that conduit 20 can also be the small low profile catheters 20 of diameter Ddin.By the way that conduit 20 can be made
Miniaturization, by increasing capacitance it is possible to increase the flow velocity of the blade root of propeller 10, the increase phase interaction with the pitch of the propeller 10 in blade root
With, it is possible to increase interference.In addition, the making of light weight and low cost can be realized, because surface area is small, it is also beneficial to reduce
Frictional resistance.Further, since be low profile catheter 20, the stream of the blade root thus, it is possible to improve the relatively slow propeller 10 of speed
Speed, therefore, it is possible to suppress the generation of cavitation erosion, and can prevent the damage and vibration of propeller 10, the generation of noise.Also,
The pitch of propeller 10 be blade root turn into maximum, blade tip portion turn into minimum value reduce in the radial direction successively decrease
Pitch, thus, it is also possible to suppress the cavitation erosion occurred in the blade tip portion of propeller 10.
Fig. 6 represent to change the leading edge of rear end 22 and the propeller 10 of the conduit 20 in the propeller with low profile catheter away from
Velocity flow profile in the case of from L.
During apart from L less than 15% in the diameter Dp of propeller 10, the interference of propeller 10 and conduit 20 shows substantially,
Make apart from L less than the 10% of Dp, thus, the load distribution to the radius R directions of propeller 10 produces bigger influence.In addition,
If make apart from L it is long when, abutted with hull 1.If made apart from L less than the 10% of Dp, it can prevent from supporting with hull 1
Connect, can prevent from being difficult to obtaining fluid from whole front.
Fig. 7 and Fig. 8 represent the degree of loading change result of the test that the ship's speed in simulated waves declines.
In the case that Fig. 7 is the distance change for representing to make the rear end of the leading edge of propeller and conduit and it is not provided with the feelings of conduit
The chart of propulsive efficiency under condition, in the case that Fig. 8 is the distance change for representing to make the rear end of the leading edge of propeller and conduit
The chart of thrust variation.
In this experiment, with Lpp (Length between Perpendiculars)=229m, B (beam)=42m, D (depth of ship)=
The 12.19m pull-up oil carriers of A Fu use Lpp=4.8600m, B=0.8914m, D=0.2587m mould as subjects ship
Type ship.
In addition, subjects propeller for ship 10 be Dp (airscrew diameter)=7m, H/D (0.7R) (pitch position)=
0.67th, EAR (developed area ratio)=0.45, Rake (leaf inclination)=- 216.7m, Z (number of sheets)=4, Boss Ratio (propeller hubs
Than)=0.1586, Skew (camber of blade)=20deg, use Dp=0.148559m, H/D (0.7R) 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, in order to which the ship's speed in simulated waves declines, ship's speed is reduced in the state of revolution fixation, is made
Self-propulsion test is carried out in the state of propeller load degree increase.
In the figure 7, abscissa represents ship's speed ratio, and ordinate represents propulsive efficiency, compares when the ship's speed ratio is dropped to 0.75
Propulsive efficiency.
Represent the rear end 22 of leading edge and the conduit 20 of propeller 10 in embodiment 1 in L=Dp × 6%, embodiment 2
L=Dp × 1% in L=Dp × 3%, embodiment 3, comparative example is without using 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 is improved.
In fig. 8, abscissa is airscrew thrust, and ordinate is nozzle profile resistance (thrust), and comparing makes airscrew thrust exist
Thrust in the case of changing between 1.05 to 1.3.
The thrust increase compared with Example 1 of embodiment 2, the thrust increase compared with Example 2 of embodiment 3.
As shown in figure 8, the leading edge of propeller 10 and the rear end 22 of conduit 20 is smaller apart from L, thrust more increases.
According to the propeller with low profile catheter of 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 is combined, and can realize the miniaturization of conduit 20, and it is the diameter Dp's of propeller 10 to make the diameter Ddin of conduit 20
Less than more than 20% 50%, do not cavitate, conduit 20 can be made close to propeller 10.Therefore, the pitch H for making propeller 10 is
Turn into maximum, the decreasing pitch in the radial direction reduction of the blade tip portion as minimum value in the blade root of propeller 10,
Thus, propeller loading degree because of stormy waves in increased actual marine site, it is possible to increase the suction effect of the central part of propeller 10
Really, the interference with conduit 20 can be utilized to optimize the load distribution in the radius R directions of the propeller 10 of control efficiency.Separately
Outside, the pitch H of propeller 10 is made to be maximum, be minimum value in blade tip portion, thereby, it is possible to suppress in the blade root of propeller 10
The cavitation erosion produced in the blade tip portion of propeller 10, therefore, it is possible to reduce the reduction of propulsive efficiency, noise, the generation of vibration and
The damage of propeller 10.
In addition, according to the propeller with low profile catheter of present embodiment, its for propeller 10 diameter Dp 20% with
Upper less than 50% conduit 20, therefore, makes the flow velocity increase of the blade root of propeller 10, the pitch with the propeller 10 of blade root
Increase interaction, so as to improve interference, it is possible to increase the efficiency of propeller 10.In addition, small-size light-weight can be realized
And frictional resistance is small, low vibration, low noise, low cost propeller 10.
In addition, according to the propeller with low profile catheter of present embodiment, by making pitch H maximum Hmax be pitch
Less than more than the 120% 160% of H minimum value Hmin, can suppress the generation of cavitation erosion, and, it is possible to increase propeller 10
The suction effect of central part is so as to form optimal load distribution, it is possible to increase propulsive efficiency.
In addition, according to the propeller with low profile catheter of present embodiment, by the rear end 22 and the propeller that make conduit 20
10 leading edge is the diameter Dp of propeller 10 more than 0.5% less than 10% apart from L, can prevent catheter proximal end 21 from contacting ship
The hull 1 of afterbody, obtains fluid from the front of whole conduit 20, and can improve the interference of conduit 20 and propeller 10 and imitate
Really.
In addition, according to the propeller with low profile catheter of present embodiment, by making the diameter ratio that conduit 20 is downstream
The small accelerating type conduit of the diameter of upstream side, can accelerate fluid, can further improve the suction of the central part of propeller 10
Enter effect.
In addition, according to the propeller with low profile catheter of present embodiment, by the center and the propeller 10 that make conduit 20
Axle center it is consistent, using the teaching of the invention it is possible to provide make and set easy and cheap conduit.
In addition, according to the propeller with low profile catheter of present embodiment, conduit 20 is via pillar 20a, 20b, 20c, 20d
The stern tube 10b or covering stern tube 10b of hull 1 hull end 1a are installed in, therefore, it is possible to be obtained from whole front
Fluid, enhancing and the interference of propeller 10 can easily carry out including the conduit 20 of existing ship so as to realize that efficiency is improved
Addition.
In addition, according to the propeller with low profile catheter of present embodiment, the cross sectional shape for making conduit 20 is convex to inner side
Convex form 23, the standout of convex form 23 increases in the upstream side of conduit 20, and camber ratio is less than 16% more than 6%, thus
Fluid can speed up in the slow upstream side of average speed, and can suppress resistance increase, further improve the center of propeller 10
The suction effect in portion.In this case, using effect is sucked, even if camber ratio is improved to less than more than 6% 16%, also do not send out
It is raw to peel off, by increasing capacitance it is possible to increase the lift for promoting hull 1 forwards.
In addition, the propeller with low profile catheter by equipping present embodiment, in the increased actual marine site of degree of loading, energy
Enough provide propeller efficiency high ship.
Industrial utilizability
According to the propeller with low profile catheter of the present invention, small-size light-weight and frictional resistance is small is low vibration, low noise, low
Cost, it is possible to increase the efficiency of propeller, also, including that can be widely used in general ship including argosy.
Claims (9)
1. a kind of propeller with low profile catheter, it is characterised in that have：
It is installed on the propeller of the stern of hull；With
The conduit in the front of the propeller is installed on,
Less than more than the 20% 50% of the diameter of a diameter of propeller of the conduit,
The pitch of the propeller is more than the 20% 40% of the diameter of the scope of the blade root as the propeller
Turn into maximum, the decreasing pitch in the radial direction reduction of the blade tip portion as minimum value below,
The distance of the leading edge of the rear end of the conduit and the propeller for the diameter of the propeller more than 0.5% less than
10%.
2. a kind of propeller with low profile catheter, it is characterised in that have：
It is installed on the propeller of the stern of hull；With
The conduit in the front of the propeller is installed on,
Less than more than the 20% 50% of the diameter of a diameter of propeller of the conduit,
The pitch of the propeller is more than the 20% 40% of the diameter of the scope of the blade root as the propeller
Turn into maximum, the decreasing pitch in the radial direction reduction of the blade tip portion as minimum value below,
The cross sectional shape of the conduit is that the standout of the convex form is in the upstream side of the conduit to the convex convex form in inner side
Increase, it is less than more than 6% 16% to make camber ratio.
3. the propeller as claimed in claim 1 or 2 with low profile catheter, it is characterised in that：
The maximum of the pitch is less than more than the 120% 160% of the minimum value of the pitch.
4. the propeller as claimed in claim 1 or 2 with low profile catheter, it is characterised in that：
The conduit is the interior diameter in the downstream accelerating type conduit smaller than the interior diameter of upstream side.
5. the propeller as claimed in claim 1 or 2 with low profile catheter, it is characterised in that：
Make the center of the conduit consistent with the axle center of the propeller.
6. the propeller as claimed in claim 1 or 2 with 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.
7. the propeller as claimed in claim 6 with low profile catheter, it is characterised in that：
There is the fixed-wing for making the fluid for flowing to propeller formation adverse current in the inner surface of the conduit.
8. the propeller as claimed in claim 7 with low profile catheter, it is characterised in that：
The pillar is doubled as being the fixed-wing, and the pillar is distorted in the direction opposite with the direction of rotation of the propeller.
9. a kind of ship, it is characterised in that：
It is equipped with the propeller with low profile catheter described in claim 1 or 2.
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 true CN107089313A (en) | 2017-08-25 |
| CN107089313B CN107089313B (en) | 2019-05-17 |
Family
ID=47600800
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| 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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|---|---|---|---|---|
| CN112078770A (en) * | 2019-11-14 | 2020-12-15 | 浙江大学 | Full-conduit type two-stage pod propeller and design method thereof |
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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 |
| 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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Also Published As
| Publication number | Publication date |
|---|---|
| EP3495257B1 (en) | 2020-04-15 |
| JP5230852B1 (en) | 2013-07-10 |
| EP3495257A1 (en) | 2019-06-12 |
| CN107089313B (en) | 2019-05-17 |
| KR20190121878A (en) | 2019-10-28 |
| CN103717488A (en) | 2014-04-09 |
| KR102144840B1 (en) | 2020-08-14 |
| 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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