CN105873818A - Marine propulsion unit - Google Patents
Marine propulsion unit Download PDFInfo
- Publication number
- CN105873818A CN105873818A CN201480071267.8A CN201480071267A CN105873818A CN 105873818 A CN105873818 A CN 105873818A CN 201480071267 A CN201480071267 A CN 201480071267A CN 105873818 A CN105873818 A CN 105873818A
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- China
- Prior art keywords
- water
- impeller
- propulsion unit
- marine propulsion
- nozzle
- 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.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H11/00—Marine propulsion by water jets
- B63H11/02—Marine propulsion by water jets the propulsive medium being ambient water
- B63H11/04—Marine propulsion by water jets the propulsive medium being ambient water by means of pumps
- B63H11/08—Marine propulsion by water jets the propulsive medium being ambient water by means of pumps of rotary type
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B1/00—Hydrodynamic or hydrostatic features of hulls or of hydrofoils
- B63B1/32—Other means for varying the inherent hydrodynamic characteristics of hulls
- B63B1/34—Other means for varying the inherent hydrodynamic characteristics of hulls by reducing surface friction
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/24—Vanes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15D—FLUID DYNAMICS, i.e. METHODS OR MEANS FOR INFLUENCING THE FLOW OF GASES OR LIQUIDS
- F15D1/00—Influencing flow of fluids
- F15D1/002—Influencing flow of fluids by influencing the boundary layer
- F15D1/0065—Influencing flow of fluids by influencing the boundary layer using active means, e.g. supplying external energy or injecting fluid
- F15D1/008—Influencing flow of fluids by influencing the boundary layer using active means, e.g. supplying external energy or injecting fluid comprising fluid injection or suction means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H11/00—Marine propulsion by water jets
- B63H11/02—Marine propulsion by water jets the propulsive medium being ambient water
- B63H11/04—Marine propulsion by water jets the propulsive medium being ambient water by means of pumps
- B63H11/08—Marine propulsion by water jets the propulsive medium being ambient water by means of pumps of rotary type
- B63H2011/081—Marine propulsion by water jets the propulsive medium being ambient water by means of pumps of rotary type with axial flow, i.e. the axis of rotation being parallel to the flow direction
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15D—FLUID DYNAMICS, i.e. METHODS OR MEANS FOR INFLUENCING THE FLOW OF GASES OR LIQUIDS
- F15D1/00—Influencing flow of fluids
- F15D1/002—Influencing flow of fluids by influencing the boundary layer
- F15D1/0025—Influencing flow of fluids by influencing the boundary layer using passive means, i.e. without external energy supply
- F15D1/003—Influencing flow of fluids by influencing the boundary layer using passive means, i.e. without external energy supply comprising surface features, e.g. indentations or protrusions
- F15D1/005—Influencing flow of fluids by influencing the boundary layer using passive means, i.e. without external energy supply comprising surface features, e.g. indentations or protrusions in the form of dimples
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T70/00—Maritime or waterways transport
- Y02T70/10—Measures concerning design or construction of watercraft hulls
Abstract
Marine propulsion unit, where said unit comprises a streamlined body, where said body has a front end and a rear end, where in use the front end will be facing upstream and the rear end downstream, where the front end has a larger cross section perpendicular to the intended travelling direction than the rear end, and where the front end is provided with a water inlet opening, where said opening is in communication with an impeller, which impeller rotates around an axis parallel to the intended travelling direction, where said impeller has one or more vanes whereby the water entering the front end is expelled radially away from the impeller's rotating axis, where said expelled water is forced through one or more rectifier nozzles directing said expelled water along the outer surface towards the rear end of the streamlined body.
Description
Technical field
The present invention relates to marine propulsion unit, wherein said unit includes streamlined body, and wherein said propelling is single
Unit is the lowest with tradition/normal shipboard propulsion members phase specific energy consumption.
Background of invention
When the energy and environmental problem are worldwide put on the agenda, produce from the development of known marine technology
Give birth to new theory.In the process, the loss source of the parts deriving from marine propuision system is always the most constant Jiao
Point and object of study.The improvement active influence of composite the development of more efficient Ship Propeling technology.
The purpose of this new propulsion system proposed is to use new by the passive type energy absorption units that combination is unique
And different active energy transfer units mechanical energy is delivered to water and obtains higher efficiency of promoting comprehensively.
It is primarily present the two kinds of main propulsion systems or concept being commercially used.By means of being arranged in stern end and water jet
In angle of rake propelling, cause water to have water inlet from the injection of stern end and other places on the underwater portion of hull.
Crucial loss region in current marine propuision system is the propeller eddy-current loss up to 30% or angular momentum
The main existing loss of loss, and reach the water coming from the conduit entrance (relative to the angulation import of hull side) flushed of 30%
Loss in spraying equipment, and from the skin friction of two systems or shear wall stress (effect of boundary layer).
In this respect, when propeller stir water, thus around propeller and rear produce angular rotation a certain amount of water
Time (angular momentum loss), eddy-current loss will be considered as the energy putting on water.Described a certain amount of water being stirred has height
Energy consumption, described energy originally can be used for pushing ahead.
Skin friction or shear wall stress are especially apparent in the import department of water injection system.On wetted surface, existence is connect
Nearly water speed is the border water layer on the surface at zero place, and extra energy will be needed with the friction law on surface simultaneously so that
Overcome the skin friction or shear wall stress causing the energy increased to use.
Subject invention
Therefore, the present invention aims at a kind of propulsion system of offer, and it eliminates the loss of Conventional propulsion systems and carries
For other advantages.
Invention describes
The present invention is by providing a kind of marine propulsion unit to meet this target, and wherein said system includes streamlined body,
Wherein said main body has front-end and back-end, and the most described front end will face upstream and described rear end face is towards downstream,
Wherein said front end is perpendicular to expect that the cross section of direct of travel is bigger than described rear end, and wherein said front end or neighbouring described
Possessing water inlet opening at front end, wherein said opening connects with impeller, and described impeller is around being parallel to described expection direct of travel
Axis rotate, wherein said impeller has one or more blade, enters the water of described water inlet opening whereby away from described
The rotation axis of impeller is radially discharged, and the water of wherein said discharge is forced through one or more nozzle, thus by described
The water discharged guides along the outer surface of described streamlined body.
When the water being discharged is forced through one or more nozzle, preferably rectification nozzle cutting the described water being discharged
Line component be preferably directed to relative to impeller rotate around axis in the radial direction and further along streamlined master
The outer surface of body, wherein the curvature of streamlined body makes the rear end towards streamlined body of the current on axial direction, this effect
Significantly.
In this context, term rectification nozzle will be understood as with predetermined and clearly defined direction/movement-oriented
The nozzle of the water of rectification nozzle it is forced through with control.
The background of the concept of the novel ship propulsion unit of the present invention resides in the fact that the modern impeller deriving from pump technology exists
Individually can obtain the efficiency far above 90% during test, this provides when combining the low drag overall index of streamlined body extremely has
The propelling of effect, is also such compared with prior-art devices time.
The parts of novel propulsion system are each has the lowest independent frictional dissipation, and these loss combinations produce relatively low damage
Consumption, thus reach higher overall propulsive efficiency.
Novel propulsion system is preferably made up of the streamlined body rotated with zero inclination angle ideally, and the most also
POD will be referred to as, mean whole system.
Thrust from propulsion system comes from the water that system produces impact.Impeller dynamic mechanism owing to making water accelerate is compeled
Flow through the relative momentum change of the water of system and when current flow through streamlined body and flow along streamlined body by nozzle
The flow direction of the tangential component caused to the change of radial direction (again, relative to impeller rotating shaft line) (wherein due to POD
The curvature on surface, flow direction changes into axial direction, towards the rear end of streamlined body).
The most in the present context, " streamlined body rotated with zero inclination angle ideally " should be understood through design close
The symmetric body of theoretical definition, but allow little deviation so as to described main body is used for actual application.Such as, described main body
Possesses one or more pillar/beam so that main body is attached to ship, propulsive force to be delivered to described ship.
Therefore, impeller serves as from pod front region pump up water, makes water accelerate and owing to providing one or more nozzles
Crooked outer surface along pod discharges the pump of water in a controlled manner.
When the impeller is rotated, its will produce negative pressure and thus by water intake impeller, described water is due to the revolving force of impeller
And accelerated and along impeller periphery is discharged.Under this position, will generally arrange one or more around described impeller
Rectification nozzle.Described rectification nozzle is for becoming the direction of the tangential component of the current being discharged into radial direction and with tailing edge
The main body of pod guides accelerated water, and flow direction is become axial direction and afterbody stream by the surface curvature of wherein said pod
Dynamic, and described main body is promoted in the opposite direction.In embodiments of the invention, wherein provide only one rectification nozzle,
This nozzle can cover the part of the periphery of impeller or whole periphery and produce on the surface of pod substantial uniform in this way
The general uniform current of distribution.In the case of more multiinjector is provided, it is anticipated that nozzle can be adjusted individually so that at pod
Surface on the accelerated water of flowing can have different layers thickness, speed and kinetic, so that the water of the main body along pod
The momentum change of stream can change, and makes described pod become to turn to whereby.
It is contemplated that, in other embodiments, will will flow alone when the bending of the beginning on the surface of main body has
Dynamic direction, when the curvature of the uniform smooth radially becoming axial direction, can reduce or remove the exterior section of rectification nozzle.
It is also envisioned that described nozzle can be oriented to provide deboost, thus stop described pod advance and from
And stop the advance of the ship installing described pod.
It is also contemplated that described nozzle can be oriented to finely tune tangent line flow component, by through being directed to the water in described nozzle
Flow direction be optimized to the direction of the stern towards streamlined body.
In order to produce general uniform thrust for smooth operation from pod, it is advantageous that have the pod structure of symmetry, with
Making to be changed, by the direction of the current across pod surface, the thrust produced will be substantial uniform on the surface of whole pod.
In the another Favourable implementations of the present invention, general through the whole cross section of the fore-and-aft plane of streamlined body
Having drop shape, wherein rear end tapers into towards tip.
This structure provides the pod with importance, and described importance is that the water flowing through the main body of pod will be provided with
Good energy dissipation, produces maximum thrust.Especially there is the rear end tapered into and will minimize turbulization and the tendency of turbulent flow,
And thus the kinetic energy being stored in current by effectively from impeller rotate transmission along pod surface and according to pod by
Gradual change little (afterwards) end is delivered in thrust.
Described pod is also equipped with the component for unit is attached to ship naturally, and wherein said component is suitable for (pushing away thrust
Enter power) it is delivered to described ship.Attachment members will have so that it can transmit the character of the power produced by pod, and will simultaneously
Advantageously described attachment is designed as having minimal flow resistance, so that minimal energy loss.
For present purposes, in some embodiments, it may be necessary to deviate the symmetric construction of described pod to compensate and using
Impact in the component that unit is attached to ship.Naturally attachment members (that is, pillar and/or beam) and pod's self will be implemented
Complete combination designs, in order to minimize the generation of turbulent flow around pod or between pod and ship.
In another Favourable implementations of the present invention, water inlet opening, impeller and one or more arrangement of nozzles are at streamline
On the surface of type main body so that the outer surface (directly) along streamlined body is channeled out the water of the discharge of described nozzle.
By water inlet opening and impeller are arranged on the surface of streamlined body, it is achieved upper water clash into impeller it
Before, described water is the most disturbed.Meanwhile, from impeller injection, the water through nozzle is directly oriented to the surface of streamlined body,
And in other embodiments, wherein impeller is arranged in more shielded position, described protectiveness is arranged and current can be caused to enter
Disturbance during impeller and when leaving impeller.
During when not arranging impeller so that accelerated water is directly discharged along the surface of pod, from the surface of nozzle to pod's
Surface is designed to appropriate on hydraulic pressure, i.e. so that guaranteeing laminar flow.
In another Favourable implementations of the present invention, nozzle has annular, is arranged on the surface of streamlined body
Around impeller, and nozzle is divided into many parts.
Nozzle leaves the water of impeller for controlling and guiding and thus guides accelerated water along streamlined body.By inciting somebody to action
Nozzle is divided into the part of separation and can control the geometry of each part, controllable flow along streamlined body and from
And control the propulsive force of the water of the different piece along pod, and thus improve the control to the ship attached by pod.
In another highly important embodiment, the blade being arranged on impeller all and impeller center of rotation interval
Opening radial distance, so that the central area of impeller is as on-bladed surface, described surface has and is essentially perpendicular to impeller
The plane of rotation axis.Described on-bladed surface can be to point to the coniform shape of direct of travel or possess another and suitably take turns
Wide.
Thering is provided open portion by the core at impeller, impeller will not cause any eddy current or turbulent flow, and because of
And energy consumption will not there is in the water entering impeller, thus for impeller provide for impeller the energy of power is provided be delivered to from
Much better ratio between the energy of the water opening impeller.Compared with tradition marine propeller, owing to propeller is usually placed in
On the wheel shaft in propeller front and typically will produce one before water arrives propeller blade, applied promotion energy by paddle
Half angular momentum loss (loss that loss at the loss, paddle tip of wheel shaft and the water yield dragged due to propeller are formed)
The fact, screw propeller exists a large amount of energy consumption.
By open surface being arranged in the center of impeller, also eliminating or at least greatly reducing this angular momentum loss.
The invention still further relates to a kind of method providing propelling, propulsion unit the most discussed above is arranged in boats and ships under water
In part, water is transported in the water inlet opening of propulsion unit at described part, and water is starting and is being arranged in rotation
During blade contact on impeller accelerated so that water discharges the surface along propulsion unit by nozzle from impeller, so that pushing away
Enter the accelerated water in the forward part of unit and negative pressure and the rear section offer thrust along described unit are provided, thus provide
Advance.
The advantage realized by implementing described propulsion unit corresponds to advantage discussed above.
Because the risk of the destructive cavitation in propulsion system is minimum owing to the speed of ship and propulsion unit increases
Changing, so this embodiment is favourable as propelled at high velocity system, wherein the beginning of cavitation is controlled, as long as and increasing
More power, can obtain higher ship's speed.
In this context, the another Favourable implementations of the present invention is important, in the embodiment described in which can be relative
In the blade that radial direction orientation or adjustment are arranged on impeller.By the blade on impeller can be adjusted, can in speed (i.e.,
The rotary speed of impeller), under the most any combination of the ship's speed etc. of water, realize the optimum angle of attack current and blade.
Accompanying drawing explanation
Let us now refer to the figures the explanation present invention, wherein
Fig. 1 illustrates the marine propulsion unit according to embodiment of the present invention
Fig. 2 illustrates water inlet opening 13, arranges impeller in said opening
Fig. 3 is shown in nozzle arrangement the embodiment arranging nozzle
Fig. 4 illustrates the computer simulation being attached to be prompted to the traditional propeller of the wheel shaft of rotation.
Fig. 5 is the unit advanced in water
Fig. 6 illustrates that the surface of main body has depression and the embodiment that extends on direct of travel of drive shaft.
Detailed description of the invention
Marine propulsion unit 1 according to embodiment of the present invention shown in Fig. 1.Described propulsion unit 1 includes streamlined
Main body 10, described main body 10 has front end 11 and rear end 12.In use, front end 11 will face upstream, i.e. will be arranged in unit
On the direct of travel of attached ship.The cross section that front end 11 is perpendicular to direct of travel is bigger than rear end 12.
Additionally, provide water inlet opening 13 in front end 11, arrange impeller in said opening, see Fig. 2.Impeller is around axle
Line 14 rotates, so that water accelerates into water inlet opening 13 and becomes the direction of current generally diametrically in rotation simultaneously
The direction of axis.When the marine propulsion unit 1 being attached to ship is advanced in water, in pod front, the current along axis 14 will be with
Ship's speed in water is identical.Due to the rotation of impeller, described water will be accelerated and discharge from impeller with the most higher speed.Quilt
The water accelerated will be forced through one or more rectification nozzle 15 and thus along the outer surface of streamlined body 10 through guiding.
In the embodiment with reference to shown in Fig. 1, nozzle 15 is arranged in nozzle arrangement 16, see also Fig. 3.At Fig. 1
With in the embodiment shown in Fig. 3, rectification nozzle 15 is arranged along the whole periphery of impeller, but can be depending on along Ship Propeling list
The required flowing of the water of the main body 10 of unit 1 utilizes the design of any nozzle and combination.
Figure 2 illustrates schematic impeller 17.In this embodiment, impeller includes the arranged circle rotated around center 19
Dish 18, so that impeller 17 will receive water and with essence on the direction indicated by arrow 21 from the direction indicated by arrow 20
The most equal upper amount discharges water, i.e. make radially and tangential component combination preferably radially and from disk 18 distribute fifty-fifty (even if
Arrow 21 only indicates both direction, is still clear that the whole outer periphery along disk 18 is discharged by accelerated water).Due to
The rotation of impeller, water will be accelerated, so that the water leaving impeller on direction 21 enters the water 20 of impeller 17 more by having ratio
High kinetic energy level.
Impeller 17 possesses generally radially to be determined upwardly along impeller surface with required spaced apart blade 22.Setting of blade
Meter is bending in this embodiment, but is also designed to straight and flat blade.Typically, blade will be relative to radially
Direction 23 somewhat angulation.It is also contemplated that can be depending on required thrust, impeller rotation, ship's speed etc. to adjust/finely tune determining of blade
To.Therefore can turn to simply by the part making whole blade or blade and adjust the angle of attack of blade and water (that is, blade is relative
In the degree that radial direction turns to).
In this embodiment, impeller has and is positioned at center 19 certain distance away from disk 18 so that central area essence
Upper opening interference-free blade.This is critically important, reason be enter water inlet opening 13 (seeing Fig. 1) water with disk
18 contact and blade be rotated on direction 21 propelling water before will be the most interference-free.According to by with reference to Fig. 4 discussion
Prior art, if blade contacts with water immediately, such as by directly from the beginning of the center of disk, then can eddy generation damage
Consumption.This will produce a certain amount of inlet vortex, and described eddy current is by the efficiency of reduction impeller.
Figure 4 illustrates the computer simulation of the traditional propeller 30 being attached to wheel shaft 31, described wheel shaft 31 is prompted to rotation
Turn, thus produce the propelling for boats and ships in a conventional manner.Due to the rotation of propeller, occur in that a large amount of of instruction turbulent water
Eddy current.Concentrate in the axial direction, central vortex loss occur due to the generation of rotating vortex 32, described rotating vortex 32 by
The innermost portion of the rotation of wheel shaft 31 and the paddle of propeller 30 is divided to rotate around wheel shaft and is caused, so that wheel shaft will not facilitate propelling
Power.
Additionally, the single paddle 33 of propeller 30 has far-end, cusping loss 34 occurs at described far-end, described most advanced and sophisticated damage
Consume and also will not facilitate propelling, and only disturbance water, thus in the far-end formation turbulent flow 34 of each propeller paddle 33.These are rapid
Stream 34 will not facilitate the thrust of propeller equipment.
Additionally, due to water is accelerated through propeller, it is the most accelerated, but a part is in angulation side
The most accelerated, increase eddy-current loss further and cause loss mentioned above in this way, described attrition inventory quantity is up to
Put on due to moment of torsion water kinetic energy 30%.
Warship designer is natural will find the iptimum relationship between paddle number, paddle area and above-described loss,
So that realizing the optimal energy use of per unit energy and the highest propelling for traditional propeller solution.But, for this
Invention, will not occur these eddy-current losses 32 and turbulent flow loss 34.
When unit 1 advances (seeing Fig. 5) in water with given speed, water will flow in and out leaf as shown in Figure 5
Wheel and rectification nozzle and the main body 10 along propulsion unit flow.
Due to the rotation of impeller 17 (seeing Fig. 2), water will be inhaled at the front end 11 of unit 1.This sucks by streamline 41
Instruction.Due to rotation and the pumping action of blade 22 (seeing Fig. 2) of impeller, water will be essentially perpendicular to inflow direction 41 and be arranged
Go out, so that water will be discharged the surface 10 along unit 1 through rectification nozzle 15.Due to wall attachment effect, accelerated water 42
To go along curved surface.Wall attachment effect is the phenomenon determined for a long time, wherein replaces with streamlined flow and leaves curved surface,
The injection of fluid (such as air or water) will remain adhered to along the surface of crooked route and goes along described surface.When ignoring stream
Friction between the surface (in the case for the outer surface 10 of unit 1) of the flowing on body (being water in the case) and water edge
Time, the power acting only on fluid particle is attributed to pressure, and therefore described pressure will cause the inside of the layer 42 of accelerated water
And the pressure differential between outside, so that external pressure is more than internal pressure.
Barometric gradient will be there is in stream 42, so that negative pressure will be there is near surface 10, to keep along cell surface
Flowing.
Therefore, when accelerated water 42 flows along the surface 10 of marine propulsion unit 1, boats and ships will be left due to pressure (hydraulic) water
Rear (the tapering into) of propulsion unit 1 holds 12 to produce thrust.Produce thrust in this way, so that impeller makes water accelerate, i.e.
To water applying kinetic energy to produce momentum change in the current 42 along the surface 10 of marine propulsion unit 1, thus it is right to produce offer
The thrust 43 of the propelling of boats and ships unit 1 and its attached ship.
Depend on the speed (that is, speed) of ship and thus depend on marine propulsion unit speed in water, unit 1
Curvature, the density (it will change due to temperature, salt content etc.) of water, can correspondingly design rectification nozzle opening 15 or described whole
Flow nozzle opening is adjustable to change the flow pattern of the pressure (hydraulic) water 42 on the surface 10 of unit.Be there are the current of kinetic energy by change
The thickness of 42 or its speed, can be pushed to propulsion unit 1 on different directions due to the change of the thrust of generation, and with this
Mode makes marine propulsion unit turn to and thus makes ship redirect to required direction.
With reference in the graphic embodiment illustrated, impeller is arranged substantially on the surface 10 of marine propulsion unit 1, but
Other embodiments include impeller and optionally include the rectification nozzle of the lower face being arranged in the cavity in unit 1 front,
So that water inlet opening 13 connects with impeller and impeller discharges water along the outer surface with propulsion unit 1 by rectification nozzle
The surface of 10 smooth connections.Depend on ship speed and thus depend on the speed of marine propulsion unit 1, with underwater turbine and
Ambient pressure in the water of rectification nozzle contact rises coming from and office in the thrust generation part postponing whole propulsion system
The beginning of the cavitation of the relevant flowing velocity of portion's pressure correlation.Because the risk of the destructive cavitation in propulsion system
Minimize owing to the speed of ship and propulsion unit increases, so this embodiment is favourable as propelled at high velocity system, its
The beginning of middle cavitation is controlled, as long as and increase more power, higher ship's speed can be obtained.
In figure 6, surface 10 possesses depression 48, stops to produce being formed at during traveling in water as described above whereby
Boundary region on unit outside, flow automatically whereby 42 barometric gradient to continue the most constant and negative pressure will be the most obvious.Replace recessed
Fall into, it is possible to provide little recess (that is, entering the projection of the main body of unit) or protruding (from the projection that the surface (plane) of unit is prominent)
Or " sharkskin " (be particularly useful for high-speed craft knows wetted surface processing), in order to realize identical purpose, i.e. suppression produces border
Layer.
It is also shown on the direct of travel of pod the live axle 44 extended in figure 6.This live axle and traditional propeller
Wheel shaft has comparability, so that the conventional marine electric machine of hull interior and when being arranged according to adaptation pod of the present invention
It is not required to be changed.
Additionally, pod possesses in attachment beam or the attachment members of pillar 46 shape.This beam 46 is used for pod is attached to ship, and
And carrying pod but also at least some of thrust is delivered to ship from pod.
In order to compare the present invention and tradition ship's propeller and water jet, it is disclosed in " Principles of Naval
Architecture, again revised edition vol. ii, 1988 " in improve and generally acknowledged computation model is referring particularly to page 132 to 135
And page 225 to 227, described page is incorporated by reference at this.In the calculation, it is only necessary to minority is assumed and adapts to.Compared to
Traditional method, the described theoretical present invention of use provides notable more preferably energy to use, as summarized in following table.In order to calculate mesh
, by the present invention be used for mailing on the up-to-date Triple E series containerized shipment ship of MAERSK LINE company the propelling that uses
Device compares.Think that these propellers are that designed and used (energy) effectively pushes device.
" HBI " refers to the present invention.
On represent the present invention and propeller in MAERSK LINE company's T riple E series containerized shipment ship
Between comparison calculate.Different inlet-duct areas is shown in each list.
Result instruction 31.42m in row second from the bottom2Inlet-duct area provide relatively high thrust with less energy consumption.Inlet face
Long-pending the biggest, result is the best.
Claims (15)
1. a marine propulsion unit, wherein said propulsion unit include streamlined body, wherein said main body have front end and
Rear end, the most described front end will face upstream and described rear end face towards downstream, wherein said front end is perpendicular to expection
The cross section of direct of travel is bigger than described rear end, and possesses water inlet opening at wherein said front end or neighbouring described front end,
Wherein said opening connects with impeller, and described impeller rotates around the axis being parallel to described expection direct of travel, wherein said leaf
Wheel has one or more blade, enter whereby the water of described water inlet opening away from described impeller rotation axis radially by
Discharging, the water of wherein said discharge is forced through one or more nozzle, thus by the water of described discharge along described streamlined
The outer surface of main body guides.
Marine propulsion unit the most according to claim 1, wherein said streamlined body or the main body rotated with zero inclination angle
Symmetrical around the rotation axis of described impeller.
Marine propulsion unit the most according to claim 1 and 2, wherein through fore-and-aft plane whole of described streamlined body
Individual cross section typically has drop shape, and wherein said rear end is gradually reduced.
4., according to the marine propulsion unit described in claim 1 or 2 or 3, wherein said streamlined body possesses described unit
Being attached to the component of ship, wherein said component is suitable for being delivered to thrust described ship.
Marine propulsion unit the most according to claim 4, wherein said component is the propeller wheel shaft of described ship, Qi Zhongsuo
State unit to substitute described propeller and install, and wherein said wheel shaft makes the impeller of described unit rotate.
6. according to the marine propulsion unit described in claim 1 or 2 or 3 or 4, wherein inside described streamlined body, it is provided that
Engine component rotates for making the described wheel shaft of described impeller.
7. according to the marine propulsion unit described in any aforementioned claim, wherein said water inlet opening, described impeller and institute
State one or more arrangement of nozzles on the described surface of described streamlined body so that by along described in described streamlined body
Outer surface guides the water of the discharge leaving described nozzle.
8. according to the marine propulsion unit described in any aforementioned claim, wherein said nozzle has annular, is arranged in described
Around described impeller on the described surface of streamlined body, and wherein described nozzle is divided into many parts.
9., according to the marine propulsion unit described in any aforementioned claim, the described blade being wherein arranged on described impeller is complete
Portion's radial distance spaced apart with the center of rotation of described impeller so that the central area of described impeller as open without leaf
Sheet surface, described surface has the plane of the rotation axis being essentially perpendicular to described impeller.
10., according to the marine propulsion unit described in claim 1 or 9, wherein said one or more blades are generally radially
It is arranged on described impeller, and wherein said one or more blade bends relative to the RADIAL through described blade, borrows
This described blade will generally radially discharge water from described impeller.
11. according to the marine propulsion unit described in claim 1 or 10, and the described blade being wherein arranged on described impeller can phase
Radial direction is oriented or is adjusted.
12. marine propulsion units according to claim 1, wherein said nozzle possesses the rectification having wall with the shape of lid
Component, wherein said wall and lid can be controlled relative to current, described rectification element the water of described discharge is directed to relative to
In the radial direction of described impeller axis, the described surface along described main body guides the water of described discharge whereby.
13. according to the marine propulsion unit described in any aforementioned claim, the described surface district of wherein said streamlined body
Territory at least partly possess multiple depression and/or recess and/or projection.
14. 1 kinds of methods providing propelling, wherein arrange according to the marine propulsion unit according to any one of claim 1 to 13
On the underwater portion of boats and ships, water is transported in the water inlet opening of described propulsion unit at described part, and described
Water is accelerated when the blade contact started and be arranged on rotary blade so that described water is discharged from described impeller by nozzle
Surface along described propulsion unit so that the described accelerated water in the forward part of described propulsion unit produce negative pressure and
Rear section along described unit provides thrust, thus provides described propelling.
15. 1 kinds of methods providing propelling, wherein arrange according to the marine propulsion unit according to any one of claim 1 to 13
On cavity under water on the underwater portion of lower section or in the front end of pod, and the speed of described ship and the most described Ship Propeling
The speed of unit 1, described ambient pressure will rise and will postpone whole propelling in water contact underwater turbine and rectification nozzle
The beginning of the cavitation coming from the relevant flowing velocity relevant to local pressure in the thrust generation part of system.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DKPA201370817 | 2013-12-23 | ||
| DKPA201370817 | 2013-12-23 | ||
| PCT/DK2014/050447 WO2015096841A1 (en) | 2013-12-23 | 2014-12-23 | Marine propulsion unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105873818A true CN105873818A (en) | 2016-08-17 |
Family
ID=52278326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201480071267.8A Pending CN105873818A (en) | 2013-12-23 | 2014-12-23 | Marine propulsion unit |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20160325811A1 (en) |
| EP (1) | EP3086999A1 (en) |
| JP (1) | JP2017501083A (en) |
| KR (1) | KR20160102044A (en) |
| CN (1) | CN105873818A (en) |
| WO (1) | WO2015096841A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107972837A (en) * | 2017-12-12 | 2018-05-01 | 裴睿涛 | Combined type pump-jet propulsor |
| CN110329478A (en) * | 2019-06-18 | 2019-10-15 | 珠海超弦智能科技有限公司 | A kind of pressurization water conservancy diversion spout for marine propeller |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3363731B1 (en) * | 2015-09-02 | 2021-06-30 | Jetoptera, Inc. | Ejector and airfoil configurations |
| CN107244379B (en) * | 2017-06-30 | 2019-10-15 | 哈尔滨工业大学 | A kind of flow control method inhibiting underwater sailing body and hydrofoil surface cavitation phenomenon |
| CN114435573B (en) * | 2022-02-17 | 2023-05-26 | 交通运输部天津水运工程科学研究所 | Marine turbine propeller |
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- 2014-12-23 WO PCT/DK2014/050447 patent/WO2015096841A1/en active Application Filing
- 2014-12-23 US US15/107,638 patent/US20160325811A1/en not_active Abandoned
- 2014-12-23 EP EP14821496.8A patent/EP3086999A1/en not_active Withdrawn
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| CN110329478A (en) * | 2019-06-18 | 2019-10-15 | 珠海超弦智能科技有限公司 | A kind of pressurization water conservancy diversion spout for marine propeller |
Also Published As
| Publication number | Publication date |
|---|---|
| EP3086999A1 (en) | 2016-11-02 |
| KR20160102044A (en) | 2016-08-26 |
| WO2015096841A1 (en) | 2015-07-02 |
| US20160325811A1 (en) | 2016-11-10 |
| JP2017501083A (en) | 2017-01-12 |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160817 |
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| RJ01 | Rejection of invention patent application after publication |