CN108163171A - Naval vessel propeller - Google Patents
Naval vessel propeller Download PDFInfo
- Publication number
- CN108163171A CN108163171A CN201810121526.3A CN201810121526A CN108163171A CN 108163171 A CN108163171 A CN 108163171A CN 201810121526 A CN201810121526 A CN 201810121526A CN 108163171 A CN108163171 A CN 108163171A
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- China
- Prior art keywords
- duct
- main duct
- naval vessel
- pass air
- propeller
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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
- B63H5/14—Arrangements on vessels of propulsion elements directly acting on water of propellers characterised by being mounted in non-rotating ducts or rings, e.g. adjustable for steering purpose
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a kind of naval vessel propeller, including：Main duct；By-pass air duct is nested with outside main duct, and with main duct coaxial line, formation interlayer runner between the by-pass air duct and main duct, and by-pass air duct grows given length in tail end than main duct；Propeller is arranged in main duct.Naval vessel propeller duct according to the present invention is relatively short, but efficiency is relatively high.
Description
Technical field
The present invention relates to a kind of naval vessel propellers.
Background technology
Naval vessel propeller is one kind of marine propeller, is the mechanism for naval vessel to be pushed to advance, mainly such as turbine
The rotation of generation makes naval vessel obtain the power to advance based on recoil by promotion of the propeller to water.Naval vessel propeller is main
It is propeller type ship's propeller, and there are mainly two types of propeller type ship's propellers, one kind is no shrouded propeller propeller,
Another kind is culvert type propeller propeller, and naval vessel propeller according to the present invention belongs to the latter.
Culvert type propeller propeller abbreviation shrouded propeller, refers to the propeller system surrounded by duct.Compared to nothing
Shrouded propeller, shrouded propeller system have higher efficiency, and have the characteristics of noise is small, safe.
The thrust size of shrouded propeller is related to flow velocity inside and outside the fluid flow and duct by starching disk, due to duct with
The complexity interfered with each other between propeller, the design of shrouded propeller usually require more experience and long period, arbitrary
Even local slightly change, be likely to generate bigger influence to its efficiency.
Chinese patent literature CN107284652A discloses a kind of integrated culvert type propeller, tool there are one duct and
Propeller in duct, is different from the known fixed structure of culvert type propeller duct, duct in the patent document
It is fixedly connected between the paddle of propeller, it is intended that impact noise is reduced by this integral structure, improves efficiency.However, its
By one-piece construction, the bypass ratio of the structure formed is bigger, and the acceleration time of fluid is shorter, and shorter duct
It is limited to the guide functions of fluid.In addition, integral structure provides the structural strength of culvert type propeller entirety, but one really
Duct with rotation inevitably increases additional energy consumption, and especially liquid resistance is bigger, therefore efficiency can be dropped
It is low.
Chinese patent literature CN104773279A discloses a kind of curve duct marine propeller, the inlet ports of duct
Diameter is larger, and port of export bore is smaller, and bore of the duct based on entrance end matches and be configured to variable-diameter structure, and duct leading edge can
Larger resistance is generated, makes the suction zones static pressure increase in duct leading edge, meanwhile, which is also connected to using blade with duct
The structure of one.In contrast, equivalent bypass ratio depends on port of export bore, so as to which its bypass ratio is much smaller.It is contained
Road bus structure is relative complex, more demanding to processing technology.And it uses the single spiral with multiple helical pitch length
Paddle, well known, the efficiency of propeller is related with Multiple factors, and two of which factor is the loss of axial induced velocity and circumferentially lures
The loss of speed is led, the spiral of multiple helical pitch length can significantly increase flow torsion, that is, generate larger circumferential induced velocity
Loss this is why the blade generally use when front propeller is multiple, and at most uses half helical pitch length
The reason of.It and since the rotating speed of propeller determines substantially, can speed up what the maximum speed of flow was to determine, cross long spire
Speedup effect it is limited.
Chinese patent literature CN104859820A then discloses a kind of two-stage culvert type marine propeller, also uses blade
The structure being fixed together with duct, and essentially correspond to employ two-stage accelerating structure, different from Chinese patent literature
CN104773279A, the patent document employ two sets of driving devices, and two sets of propellers are accelerated respectively, i.e. previous stage speed
Spend relatively low, latter step velocity is higher, and actually rear stage is further accelerated to having generated the fluid of certain speed.
As previously mentioned, Chinese patent literature CN104773279A is pointed out, front end static pressure area is larger, is conducive to the raising of efficiency, in other words,
Two-stage acceleration can actually lose the efficiency of rear stage acceleration, and whole energy consumption is bigger than normal.And whole duct length is bigger than normal, for rear
The canoe of propeller is put, the degree of difficulty that propeller is installed on hull can be dramatically increased.
Invention content
In view of this, the purpose of the present invention is to provide a kind of duct is relatively short, but the relatively high naval vessel of efficiency pushes away
Into device.
A kind of naval vessel propeller, including：
Main duct；
By-pass air duct is nested with outside main duct, and with main duct coaxial line, formation interlayer runner between the by-pass air duct and main duct, and
By-pass air duct grows given length in tail end than main duct；
Propeller is arranged in main duct.
Above-mentioned naval vessel propeller, optionally, main duct and by-pass air duct are that head end bore is contained more than the taper of tail end bore
Road.
Optionally, the taper of by-pass air duct is more than the taper of main duct.
Optionally, the head end of main duct and by-pass air duct is coplanar；
There is provided a preposition preposition cylinder for being connected to main duct head end, which is cylindrical drum, the internal diameter and intension of the cylindrical drum
The head end bore in road is identical；
Preposition cylinder and main duct coaxial line.
Optionally, the length of preposition cylinder is 1st/1/6th ~ five of its internal diameter.
Optionally, the given length is 0.4 ~ 0.7 times of main duct tail end bore.
Optionally, by-pass air duct tail end bore is 0.75 ~ 0.92 times of main duct tail end bore.
Optionally, interlayer runner is circumferentially equipped with floor；
The centripetal end of the floor is connected to the outer surface of main duct, and the centrifugation end of floor is connected to the inner surface of by-pass air duct.
Optionally, floor is the radial direction panel based on main duct；
There are six floor is common.
Optionally, dorsal fin is circumferentially equipped in the outer surface of by-pass air duct, dorsal fin forms the radial direction panel of by-pass air duct.
Embodiment according to the present invention, with main duct and the by-pass air duct being sleeved on except main duct, wherein, propeller peace
In main duct, travelled forward required recoil strength by generating naval vessel to push of the fluid to duct tail end.Propeller
During drain backward, vortex can be formed, the component in vortex backward belongs to the rotational component beneficial to component, and in being vortexed
Then belong to harmful component.But the study found that the two components can all be based on Venturi effect penetrates effect to low-pressure area generation suction,
The Fluid pressure in interlayer runner between two ducts is less than the Fluid pressure that main duct ejects, and beneficial component therein can produce
Raw inhale penetrates effect, and also there is rotational component therein suction to penetrate effect, so as to which a part of rotation function of fluid is converted
The kinetic energy of fluid backward in runner between stratification improves the efficiency of naval vessel propeller.In addition, the duct of inside and outside nesting, it is not necessary to logical
Cross the raising that multistage or more piece spiral realizes efficiency, whole length is relatively short, although and bypass ratio increased,
Still falling within can received range.
Description of the drawings
Fig. 1 is that the master of naval vessel propeller in one embodiment of the invention cuts open structure diagram.
Fig. 2 is the overlooking the structure diagram corresponding to Fig. 1.
Fig. 3 is a kind of naval vessel propeller dimensional structure diagram.
In figure：1. floor, 2. fin keels, 3. by-pass air ducts, 4. main ducts, 5. preposition cylinders, 6. propellers, 7. interlayer runners.
Specific embodiment
For naval vessel propeller, it is adapted end to end with naval vessel end to end, i.e. the head of fore direction and naval vessel propeller
Side, the side opposite with rostral are rear side or caudal, are adapted with the stern on naval vessel.
In general, the main outline of duct is revolving body, there is the rotating shaft of determining axis and revolving body, base
In rotating shaft, duct is radially, axially and circumferential with what is determined, while has determining centrifugation and centripetal direction.
A kind of naval vessel propeller shown in referring to Figure of description 1 ~ 3, there are two duct, i.e., intensions shown in figure for tool
Road 4 and by-pass air duct 3, two duct coaxial lines both need to ensure have higher concentricity during assembling.
In general, by-pass air duct 3 can be directly installed on naval vessel hull bottom, fixed setting, main duct 4 then can be by axis
Naval vessel hull bottom is partially installed on to extend by-pass air duct 3, can also be connected on by-pass air duct 3 by the connector of radial direction.
Wherein, for setting propeller 6 in main duct 4, independent mounting bracket need not be configured in propeller 6, but directly
It is connect with propeller shaft, by the output axis connection and support helix paddle 6 of power-equipment, propeller 6 is made to keep given with main duct
Concentricity.
For by-pass air duct 3, then with 4 coaxial line of main duct, in mated condition, by-pass air duct 3 is located at outside main duct 4 the two,
It is smaller to directly affecting for by-pass air duct 3 to the thrust of fluid produced by propeller 6.
In contrast, conventional in use, the input end of duct is its head end, such as main duct 4, propeller 6 works normally
When, flow enters from the head end of main duct 4, is discharged from its tail end, and the head end of main duct 4 is upper end as shown in Figure 1.
On the cutting plane using duct axis as normal, circular diameter is more than outside 4 cutting plane of main duct in 3 cutting plane of by-pass air duct
Circular diameter determines interlayer runner 7 between main duct 4 and by-pass air duct 3, when forward, interlayer runner 7 also has fluid stream on naval vessel
It crosses, due to circulating in interlayer runner 7 not by the direct acceleration of propeller 6, compared to the fluid in main duct 4, in interflow
The head pressure of 7 port of export of road is less than the head pressure of 4 port of export of main duct, can thereby generate Venturi effect.
Venturi effect is also referred to as venturi effect, and finder is Italian physicist's venturi（Giovanni
Battista Venturi）It was found that it therefore, is named with its name.The effect shows restricted flow by diminution
During flow section, there is the phenomenon that flow velocity increase in fluid, and flow velocity is inversely proportional with flow section.And by Bernoulli's theorem it is found that
The increase of flow velocity is with the reduction of Fluid pressure, i.e., common venturi phenomenon.Generally, this effect refers in high velocity stream
Dynamic fluid nearby can generate low pressure, so as to generate suction-operated.
Relative to the flow that interlayer runner 7 is discharged, the flow that main duct 4 is discharged belongs to high-velocity fluid, and the two exists certain
Current difference, the high-velocity fluid that the port of export of main duct 4 is formed can generate attraction, so as to generate to layer to interlayer runner 7
Between fluid is further speeded up in runner 7 effect.And this acceleration is not only embodied in the axial direction that main duct 4 discharges water flowing value
Component, is also manifested in its circumferential component, and main duct 4 is discharged the rotational component in the vortex of liquid generation, can also be formed negative
Pressure, generates the attraction to fluid in interlayer runner 7, so as to the part momentum of rotational component is converted into the axial direction of fluid point
Amount, reduces harmful component, improves useful component, so as to improve the efficiency of naval vessel propeller.
In addition, by-pass air duct 3 grows given length L in tail end than main duct 4, which is mainly to provide for the configuration being adapted to
One transformed space, forms Venturi tube at this.
Based on aforementioned configuration, the loss of circumferential induced velocity can be reduced, you can to reduce flow torsion loss.
In addition, being constrained by double-deck duct, cavitation phenomena is further reduced, and can further reduce the noise of spiral 6.
Referring to Figure of description 1 and 3, as it can be seen that main duct 4 and by-pass air duct 3, which are head end bore, is more than tail end bore in figure
Taper duct.Based on this, Chinese patent literature CN104773279A can be referred to, be configured the input end bore of duct compared with
Greatly, port of export bore is smaller, and bore of the duct based on entrance end matches and be configured to variable-diameter structure, and duct leading edge can generate
Larger resistance makes the suction zones static pressure increase in duct leading edge, is conducive to improve efficiency.
In an embodiment of the present invention, double duct structures are used, the main duct 4 based on pyramidal structure can generate relatively strong
Jet velocity, so as to generate it is stronger suction penetrate ability, efficiency is further improved based on Venturi effect.
Further, the taper of by-pass air duct 3 is more than the taper of main duct 4, and the distance between by-pass air duct 3 and main duct 4 exist
Duct is axial, is tapered on direction from the beginning to the end, is formed and closed up, can further strengthen Venturi effect.
In addition, as previously mentioned, the duct structure based on taper, be conducive to improve suction zones static pressure in duct leading edge, but
In the head end of main duct 4, if provided with internal duct and external duct head end is concordant, since 4 inlet suction of main duct is bigger, fluid can be influenced
Interlayer runner 7 is entered, in view of this, in the construction shown in fig. 1, main duct 4 and the head end of by-pass air duct 3 are coplanar.Then exist
The front end of main duct 4 sets a preposition cylinder 5, can reduce the influent stream interference to interlayer runner 7.
Further, referring to Figure of description 1, as it can be seen that preposition cylinder 5 is cylindrical drum in figure, the internal diameter of the cylindrical drum with it is interior
The head end bore of duct 4 is identical, the direct end face connection of the two, and preposition cylinder 5 and 4 coaxial line of main duct.
Preposition cylinder 5 is unsuitable long also unsuitable too short, if long, can generate larger boundary friction, and generates larger
The loss of axial induced velocity.Preposition cylinder 5 is also unsuitable too short, the attraction that otherwise main duct 4 can be caused more powerful and influence interlayer
The entrance of 7 flow of runner, in view of this, the length of preposition cylinder 5 are 1st/1/6th ~ five of its internal diameter.
In addition, being considered based on roughly the same, about aforementioned given length L, should not be too large, it is only necessary to can generate
Venturi effect can meet the construction of Venturi tube, the long damage that obviously can also increase axial induced velocity
It loses.The construction of Venturi tube is considered simultaneously, and the given length L is 0.4 ~ 0.7 times of 4 tail end bore D1 of main duct.
In addition, the rotation of vortex can further be slackened based on boundary friction, to mitigate ship caused by vortex recoil
Body tilts, and based on pyramidal structure, can further strengthen boundary friction, recoil caused by vortex impacts outer with vortex
Momentum caused by 3 wall surface of duct can generate certain counteracting, so as to mitigate the inclination on naval vessel.Accordingly, it is considered to this kind of factor,
3 tail end bore D2 of by-pass air duct is 0.75 ~ 0.92 times of main duct tail end bore D1.
In addition, being referred in aforementioned explanation, main duct 4 can be connected on by-pass air duct 3, in addition, for circumferential induction
The loss of speed, can the inhibition being arranged to a certain extent based on provided with internal duct and external duct.In the structure shown in Fig. 1 ~ 3, interlayer
Runner 7 is circumferential to be equipped with floor 1, and floor can generate vortex inhibition, and based on taper duct structure as shown in Figure 1,
In flow from the beginning to the end through-flow, floor 1 and provided with internal duct and external duct form a closing-in structure, not only contribute to inhibit vortex
It generates, and suction is penetrated effect and become apparent from.
Therefore, the vortex that main duct 4 ejects can be effectively suppressed the rotation ejector action of interlayer runner 7.
Correspondingly, the centripetal end of the floor 1 is connected to the outer surface of main duct 4, and the centrifugation end of floor 1 is connected to outer culvert
The inner surface in road 3.
Further, floor 1 is the radial direction panel based on main duct 4.
Preferably, there are six floor 1 is total to.
In addition, as shown in Fig. 1 ~ 3, dorsal fin, fin keel 2 as shown in Figure 1, the back of the body are circumferentially equipped in the outer surface of by-pass air duct 3
Fin forms the radial direction panel of by-pass air duct 3.Fin keel 2 mainly to duct outside flow carry out rectification, reduce resistance.
Claims (10)
1. a kind of naval vessel propeller, which is characterized in that including：
Main duct；
By-pass air duct is nested with outside main duct, and with main duct coaxial line, formation interlayer runner between the by-pass air duct and main duct, and
By-pass air duct grows given length in tail end than main duct；
Propeller is arranged in main duct.
2. naval vessel propeller according to claim 1, which is characterized in that main duct and by-pass air duct are that head end bore is more than
The taper duct of tail end bore.
3. naval vessel propeller according to claim 2, which is characterized in that the taper of by-pass air duct is more than the taper of main duct.
4. the naval vessel propeller according to Claims 2 or 3, which is characterized in that the head end of main duct and by-pass air duct is coplanar；
There is provided a preposition preposition cylinder for being connected to main duct head end, which is cylindrical drum, the internal diameter and intension of the cylindrical drum
The head end bore in road is identical；
Preposition cylinder and main duct coaxial line.
5. naval vessel propeller according to claim 4, which is characterized in that the length of preposition cylinder is 1/6th of its internal diameter
1/5.
6. according to any naval vessel propeller of claim 1 ~ 3, which is characterized in that the given length is main duct tail end
0.4 ~ 0.7 times of bore.
7. naval vessel propeller according to claim 6, which is characterized in that by-pass air duct tail end bore is main duct tail end bore
0.75 ~ 0.92 times.
8. according to any naval vessel propeller of claim 1 ~ 3, which is characterized in that interlayer runner is circumferentially equipped with floor；
The centripetal end of the floor is connected to the outer surface of main duct, and the centrifugation end of floor is connected to the inner surface of by-pass air duct.
9. naval vessel propeller according to claim 8, which is characterized in that floor is the radial direction panel based on main duct；
There are six floor is common.
10. according to any naval vessel propeller of claim 1 ~ 3, which is characterized in that circumferentially equal in the outer surface of by-pass air duct
Dorsal fin is equipped with, dorsal fin forms the radial direction panel of by-pass air duct.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810121526.3A CN108163171B (en) | 2018-02-07 | 2018-02-07 | Ship propeller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810121526.3A CN108163171B (en) | 2018-02-07 | 2018-02-07 | Ship propeller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108163171A true CN108163171A (en) | 2018-06-15 |
| CN108163171B CN108163171B (en) | 2023-06-23 |
Family
ID=62513641
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810121526.3A Active CN108163171B (en) | 2018-02-07 | 2018-02-07 | Ship propeller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108163171B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112776968A (en) * | 2021-02-10 | 2021-05-11 | 北京理工大学 | Double-duct water jet propulsion pump with adjustable rotating speed |
| CN112776967A (en) * | 2021-02-10 | 2021-05-11 | 北京理工大学 | Axial-flow type double-duct water jet propeller |
| CN112945306A (en) * | 2021-02-05 | 2021-06-11 | 中国航发沈阳发动机研究所 | Test platform for simultaneously measuring thrust and flow of double-duct spray pipe |
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| SU123859A1 (en) * | 1959-02-18 | 1959-11-30 | А.Г. Чугаев | Jet propulsion device |
| GB873851A (en) * | 1957-08-07 | 1961-07-26 | Pierre Mercier | Apparatus for improving the performance of stream-lined bodies propelled in a fluid |
| JPS5164295A (en) * | 1974-10-18 | 1976-06-03 | Nat Res Dev | Dakuto puroperasochi |
| CN101215479A (en) * | 2008-01-11 | 2008-07-09 | 卫丕昌 | Application of high-energy oxygen-containing fuel |
| CN105065136A (en) * | 2015-08-07 | 2015-11-18 | 无锡市悦丰化工有限公司 | Mechanical equipment turbojet engine structure for chemical plant |
| CN205256630U (en) * | 2015-11-26 | 2016-05-25 | 南通长青沙船舶工程有限公司 | Pipe type marine propeller |
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2018
- 2018-02-07 CN CN201810121526.3A patent/CN108163171B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB873851A (en) * | 1957-08-07 | 1961-07-26 | Pierre Mercier | Apparatus for improving the performance of stream-lined bodies propelled in a fluid |
| SU123859A1 (en) * | 1959-02-18 | 1959-11-30 | А.Г. Чугаев | Jet propulsion device |
| JPS5164295A (en) * | 1974-10-18 | 1976-06-03 | Nat Res Dev | Dakuto puroperasochi |
| CN101215479A (en) * | 2008-01-11 | 2008-07-09 | 卫丕昌 | Application of high-energy oxygen-containing fuel |
| CN105065136A (en) * | 2015-08-07 | 2015-11-18 | 无锡市悦丰化工有限公司 | Mechanical equipment turbojet engine structure for chemical plant |
| CN205256630U (en) * | 2015-11-26 | 2016-05-25 | 南通长青沙船舶工程有限公司 | Pipe type marine propeller |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112945306A (en) * | 2021-02-05 | 2021-06-11 | 中国航发沈阳发动机研究所 | Test platform for simultaneously measuring thrust and flow of double-duct spray pipe |
| CN112945306B (en) * | 2021-02-05 | 2022-06-07 | 中国航发沈阳发动机研究所 | Test platform for simultaneously measuring thrust and flow of double-duct spray pipe |
| CN112776968A (en) * | 2021-02-10 | 2021-05-11 | 北京理工大学 | Double-duct water jet propulsion pump with adjustable rotating speed |
| CN112776967A (en) * | 2021-02-10 | 2021-05-11 | 北京理工大学 | Axial-flow type double-duct water jet propeller |
| CN112776968B (en) * | 2021-02-10 | 2022-08-30 | 北京理工大学 | Double-duct water jet propulsion pump with adjustable rotating speed |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108163171B (en) | 2023-06-23 |
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