CN102530212A - Self-adaptive biomimetic composite propeller blade - Google Patents
Self-adaptive biomimetic composite propeller blade Download PDFInfo
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- CN102530212A CN102530212A CN2011104442074A CN201110444207A CN102530212A CN 102530212 A CN102530212 A CN 102530212A CN 2011104442074 A CN2011104442074 A CN 2011104442074A CN 201110444207 A CN201110444207 A CN 201110444207A CN 102530212 A CN102530212 A CN 102530212A
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Abstract
The invention relates to a self-adaptive biomimetic composite propeller blade. The body of the self-adaptive biomimetic composite propeller blade is formed by a guiding edge part and a following edge part. The self-adaptive biomimetic composite propeller blade is characterized in that the guiding edge part is arranged by taking the reference axis of a propeller as a center and provided with a rigid blade core, the rigid blade core is covered by a flexible material layer, and the flexible material layer extends along the chord length direction to form the following edge part. The self-adaptive biomimetic composite propeller blade has a simple and compact structure and is convenient to install. Due to the adoption of the self-adaptive biomimetic composite propeller blade, the overall manufacturing cost of the ship is reduced. Due to the adoption of the rigid blade core of the guiding edge part and the flexible material structure of the following edge part as well as the structure and the appearance of the propeller blade with the self-adaptive wake flow attack angle change, the violent bearing force vibration of the propeller blade working in the non-uniform wake field and the vacuole induced ship hull surface fluctuating pressure are reduced, the power of a host can be fully utilized in multiple working conditions, and the waste of the power of the conventional propeller host and the ducted propeller host can be reduced.
Description
Technical field
The present invention relates to a kind of marine propeller, especially relate to a kind of self-adaptive biomimetic composite propeller blade.
Background technology
In all kinds of propeller for vessels propelling units; Most screw propellers are operated in the non-homogeneous tail flow field of boats and ships, and blade is all changing at the blade section incoming flow angle of attack of all angles position in 360 ° that rotates a circle, and has caused that so the stressed moment of screw propeller is all changing; Oar axle bearing force vibration is violent; And because the variation of the angle of attack, little when big during the pressure peak of blade surface, extremely unsettled cavitating flow occurs and caused strong cavity to induce the hull surface pulsating pressure.(drawing " propeller exciting force " from what friend's sound academician, Wang Guoqiang professor chief editor, press of Shanghai Communications University).
On the other hand; Multi-state boats and ships (like tugboat, fishing boat, mine sweeper, dredger, ro-ro passenger ship and ocean engineering vehicle etc.) account for very big proportion in boats and ships quantity, their characteristics are to have two (state and bitt state certainly navigate) above different working conditions at least.For under each operating mode; Boats and ships can both obtain propulsion quality preferably; For a long time; The marine propeller design engineer has been carried out conventional screw propeller, the shrouded propeller optimal design to such boats and ships, but is that conventional screw propeller or shrouded propeller all exist the problem of failing to make full use of main engine power.Propose tuning for Controllable Pitch Propeller and conduit tuning for Controllable Pitch Propeller propelling unit afterwards, avoided this shortcoming; Also there is the expert to recommend to adopt multi-speed gear box.Yet distance adjustor and change-gear set (draw from " Shipbuilding of China " periodical literature " for multi-state propulsion of ship properties Research " author: it is luxuriant to contain the Bang Zhuwen that shakes) that these need complex and expensive have increased the whole manufacturing cost of boats and ships.
Summary of the invention
The applicant is to above-mentioned problem; Carried out research and improved, a kind of self-adaptive biomimetic composite propeller blade is provided, simple and compact for structure; Low cost of manufacture; Reduce the disturbance force that is operated in screw propeller in the non-homogeneous tail flow field of stern, can all can fully absorb main engine power under the multi-states such as boat and bitt certainly, reduce the waste of conventional screw propeller and shrouded propeller main engine power for the multi-state propeller for vessels.
In order to solve the problems of the technologies described above, the present invention adopts following technical scheme:
A kind of self-adaptive biomimetic composite propeller blade; Constitute blade body by guide margin portion and lagging edge portion; Said guide margin portion is that the center is provided with screw propeller with reference to bobbin; Said guide margin portion is provided with rigidity leaf core, and said leaf core is coated with flexible material layer outward, and said flexible material layer extends along the chord of foil length direction and constitutes said lagging edge portion.
Further:
It is from the blade root to the leaf, to increase slightly gradually that the skew back of said blade body distributes, and the maximum camber position of the blade section of said blade body trends towards lagging edge, and the maximum ga(u)ge position of the blade section of said blade body trends towards guide margin.
The section shape of said leaf core on blade section is airfoil, and the thickness of said leaf core section is by the attenuation slightly gradually of blade root to leaf.
The material of flexible material layer is carbon fiber or glass fiber compound material.
Said leaf core is processed by high rigidity metallic material.
Because aquatic animal has formed unique body structure and profile through long natural evolvement; Make them in water, to enjoy a trip to; There are some researches show: the energy of its consumption was that 1/7th of indeformable stretched dolphin model (draws from " boats and ships mechanics " periodical literature " flexibility is swung the tangential deformation pattern of hydrofoil and the influence of propulsion quality is studied " when dolphin moved about at 15～20kn; The author: Wang Zhidong etc.), this self adaptation change of fluid ability that dolphin has been described has been brought mirable hydrodynamic performance.The present invention is through the solid Coupling Design Calculation and Study of stream; A kind of self-adaptive biomimetic composite propeller blade is provided; Can reduce the disturbance force that is operated in screw propeller in the non-homogeneous tail flow field of stern on the one hand, can all can more fully absorb main engine power under the multi-states such as boat and bitt certainly for the multi-state propeller for vessels on the other hand, avoid the waste of conventional screw propeller and shrouded propeller main engine power serious; And the shortcoming that the out of reach speed of a ship or plane requires has broad application prospects in all kinds of boats and ships.
Technique effect of the present invention is:
A kind of self-adaptive biomimetic composite propeller blade disclosed by the invention, simple and compact for structure, easy for installation, the whole manufacturing cost of reduction boats and ships; Adopt the rigidity leaf core of guide margin portion and the flexible material structure of lagging edge portion; And the blade structure and the profile of employing self adaptation wake flow angle of attack variation; Reduced screw propeller and induced the hull surface pulsating pressure owing to be operated in bearing force vibration and cavity violent in the non-homogeneous tail flow field; Under multi-state, all can make full use of main engine power, reduce the waste of conventional screw propeller and shrouded propeller main engine power.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the working state schematic representation of the arbitrary section of blade body.
The specific embodiment
Do further detailed explanation below in conjunction with the accompanying drawing specific embodiments of the invention.
As shown in Figure 1, constitute blade body 100 by guide margin portion 1 and lagging edge portion 2, guide margin portion 1 is that the center is provided with screw propeller with reference to bobbin 200; Guide margin portion 1 is provided with rigidity leaf core 3; The leaf core 3 outer flexible material layers 4 that are coated with, flexible material layer 4 extends formation lagging edge portion 2 along the chord of foil length direction, and the skew back of blade body 100 distributes and from the blade root to the leaf, increases slightly gradually; Make lagging edge portion 2 be distributed in rear with reference to bobbin 200; The material of flexible material layer 4 is carbon fiber or glass fiber compound material, and Ye Xin 3 is processed by high rigidity metallic material, and various materials satisfy the requirement of strength of screw propeller work.The blade section shape of blade body 100 is airfoil; The section shape of leaf core 3 on blade section is airfoil, and the thickness of the section of Ye Xin 3 is by the attenuation slightly gradually of blade root to leaf, and the maximum camber position of the blade section of blade body 100 trends towards lagging edge; The maximum ga(u)ge position of the blade section of blade body 100 trends towards guide margin; Each section by among Fig. 1 can see that it is very little that camber is distributed in guide margin portion 1 zone, and maximum camber is positioned at section near with edge regions; Thickness distribution is less in lagging edge portion 2 zones, and maximum thickness is positioned at section near the guide margin zone.The leaf root part of blade body 100 of the present invention is high rigidity metallic material and makes, and can be installed on the propeller hub through slot is nested, also can make with the propeller hub global formation.
Below in conjunction with Fig. 2 principle of work of the present invention is made an explanation.Fig. 2 is the working state schematic representation of blade body 100 arbitrary sections, and 2a is that screw propeller does not rotate among Fig. 2, the section shape under in the raw, and 2b and 2c be the deformation state of corresponding blade body 100 sections under speed of incoming flow Vb and Vc respectively.
When screw propeller with a certain rotary speed working in the hull tail flow field; The speed of incoming flow of the arbitrary section of screw propeller comprises induction velocity and the screw propeller rotative speed of considering screw propeller and the interactional actual effect influent stream of wake flow speed, each other section of blade; Wherein rotative speed obtains according to the product of propeller speed and radius, and rotative speed is constant when rotating speed is constant; The speed of incoming flow of the arbitrary section of screw propeller can be divided into axial speed of incoming flow again, tangential speed of incoming flow and speed of incoming flow radially.When blade position changed, the speed of incoming flow of each section will change in the hull tail flow field, and the propeller-blade section angle of attack also changes thereupon; Receive surface pressure that fluid applies also in continuous variation; Constituted the variation of oar axle bearing power, caused the oar shaft vibration, and passed to hull.
Axially speed is less in speed of incoming flow, and when tangential velocity was big, the propeller-blade section angle of attack was bigger, and like the incoming flow Vc among Fig. 2, this moment, blade was stressed bigger, and the free state that do not stress of 2a among the relative figure of propeller-blade section is with being deformed to like the 2c state among Fig. 2.During the propeller-blade section configuration design with maximum camber near lagging edge, make the maximum pressure differential (load) of blade face and blade back move, and less near the thickness of lagging edge to lagging edge, make near the blade profile distortion of lagging edge bigger like this; The blade inner structure is provided with the leaf core 3 of high rigidity metal structure in guide margin portion 1; Just rotate the firm heart in guide margin portion; And lagging edge portion 2 is flexible material layers 4 of being processed by the carbon fiber or the glass fiber compound material of flexibility; Therefore very help 2 distortion of lagging edge portion, this has just imitated the afterbody distortion in the torrent of fish.Resultant effect is that the pitch angle and the camber of blade section all diminishes, and this makes and relaxed the stressed trend that reduces that is of blade because axial velocity is less that the stressed change that tangential velocity causes more greatly is big.
Axially speed is bigger in speed of incoming flow; Tangential velocity hour, the propeller-blade section angle of attack is less, like the incoming flow Vb among Fig. 2; Because the angle of attack of the relative Vb of section is littler than the angle of attack of Vc; Therefore blade is stressed reduces, in conjunction with above-mentioned stressed big phenomenon, thrust and torque ripple that this stressed phenomenon with the speed angle of attack variation is conventional screw propeller.But for the free state that do not stress of the 2a among relative Fig. 2 of blade of the invention; With being deformed to, and when considering blade section profile and inner structure, owing to stressedly come stream mode to diminish than Vc like the 2b state among Fig. 2; The distortion of propeller-blade section makes pitch angle and camber 2b state bigger than 2c state behind the overcurrent solid coupling analysis; Therefore this makes and has relaxed the stressed trend that is increase again of blade because axial velocity is bigger, and less cause stressed of tangential velocity diminishes.
The bionical propeller blade that the invention proposes can the self adaptation incoming flow angle of attack variation, relax the stressed variation that brings because of angle of attack variation, reduced the bearing force vibration.
Except the bearing force vibration; Owing to the irregularity of wake flow, the cavitating flow phenomenon that blade surface takes place will be very unstable in wake flow for screw propeller, and the pulsation of cavity will be induced strong hull surface pulsating pressure; Pass to hull surface through water body, cause ship vibration.The bionical propeller blade that in the invention, proposes; From blade institute cross-sectional profile, the leaf of guide margin portion 1 is thick bigger, and camber is less; This profile helps blade and adapts to the variation of the hydrodynamic force angle of attack and be unlikely to guide margin portion 1 pressure spike and alter a great deal; Be the cavity bucket that this aerofoil profile has broad, thereby suppress and controlled the wild effect of cavity, reduced the hull surface pulsating pressure that cavity is induced.Because the blade constructional feature when the angle of attack is big, through flowing solid coupling Deformation, makes that pitch and the camber after the distortion diminishes, relaxed the angle of attack and become big trend on the other hand; And at the angle of attack hour,, make that the pitch after the distortion becomes greatly with camber through flowing solid coupling Deformation, relaxed the trend that the angle of attack diminishes; The self adaptation Deformation control of this mitigation angle of attack variation the variation of blade surface pressure spike, thereby make the cavitating flow cause because of pressure spike tend towards stability, reduced the hull surface pulsating pressure that cavity is induced.
Can see thus, but reduce the pulsating pressure that bearing force vibrates and cavity is induced for blade profile of the present invention and structure actv..
Propeller blade of the present invention can be applicable to the multi-state boats and ships equally, and the multi-state boats and ships have two representative type mode of operations: the bitt state and the state that navigates certainly.Under the bitt state, design conventional screw propeller and obtain optimum speed, and make and under the bitt state, can absorb main engine power fully, produce maximum bitt thrust; But conventional oar is under boat state certainly, because the restriction of engine speed, its maximum speed is still design-calculated rotating speed under the bitt state; Therefore the rotating speed under the boat state is constant, but the speed of a ship or plane under the boat state is very high, and the combination of the speed of a ship or plane and rotating speed makes the propeller section angle of attack diminish; Stressed diminishing; Be that the relative bitt state of moment of torsion and thrust reduces a lot, the main engine power waste is serious, the speed of a ship or plane of boat certainly that out of reach requires.
The bionic composite material propeller blade contour structures that the present invention proposes is according to the solid coupling principle of stream, under the bitt state; Screw propeller turns round with design speed, and its incoming flow angle of attack is bigger, like Vc among Fig. 2; Its distortion to 2c, through flowing solid Coupling Design, makes that the 2c after the distortion is consistent with the pitch and the camber of aforesaid common propeller blade from the 2a of state of nature; Under the bitt state, also fully absorb main engine power behind the bionical deformable blade like this, sent maximum bitt thrust; And under boat state certainly, because the angle of attack diminishes, like the Vb among Fig. 2; Bionical vane stress also diminishes, but because the solid coupling principle of stream, and the 2c section under the relative bitt state of its pitch angle and camber increases; Make the stressed trend that is increase again, therefore conventional relatively screw propeller, its thrust and moment of torsion will increase greatly; Absorb main engine power and also increase considerably, utilized main engine power more fully, also obtained bigger raising from the speed of a ship or plane simultaneously.
Claims (5)
1. self-adaptive biomimetic composite propeller blade; Constitute blade body by guide margin portion and lagging edge portion; It is characterized in that: said guide margin portion is that the center is provided with screw propeller with reference to bobbin; Said guide margin portion is provided with rigidity leaf core, and said leaf core is coated with flexible material layer outward, and said flexible material layer extends along the chord of foil length direction and constitutes said lagging edge portion.
2. according to the described self-adaptive biomimetic composite propeller of claim 1 blade; It is characterized in that: it is from the blade root to the leaf, to increase slightly gradually that the skew back of said blade body distributes; The maximum camber position of the blade section of said blade body trends towards lagging edge, and the maximum ga(u)ge position of the blade section of said blade body trends towards guide margin.
3. according to the described self-adaptive biomimetic composite propeller of claim 1 blade, it is characterized in that: the section shape of said leaf core on blade section is airfoil, and the thickness of said leaf core section is by the attenuation slightly gradually of blade root to leaf.
4. according to the described self-adaptive biomimetic composite propeller of claim 1 blade, it is characterized in that: the material of flexible material layer is carbon fiber or glass fiber compound material.
5. according to the described self-adaptive biomimetic composite propeller of claim 1 blade, it is characterized in that: said leaf core is processed by high rigidity metallic material.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011104442074A CN102530212A (en) | 2011-12-27 | 2011-12-27 | Self-adaptive biomimetic composite propeller blade |
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| CN2011104442074A CN102530212A (en) | 2011-12-27 | 2011-12-27 | Self-adaptive biomimetic composite propeller blade |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105416538A (en) * | 2015-12-07 | 2016-03-23 | 哈尔滨工业大学 | Marine screw propeller with deformable paddles |
| WO2018206860A1 (en) * | 2017-05-11 | 2018-11-15 | Jose Buendia | Optimized helicopter - aeroplane - wing- propeller/rotor profiles |
| WO2019061705A1 (en) * | 2017-09-26 | 2019-04-04 | 广船国际有限公司 | Method and device for numerical simulation of ship self-propulsion point, and computer apparatus |
| WO2019061706A1 (en) * | 2017-09-26 | 2019-04-04 | 广船国际有限公司 | Method and device for numerical simulation of ship self-propulsion point, and computer apparatus |
| CN111486050A (en) * | 2020-03-05 | 2020-08-04 | 天津大学 | Deformable power generation sail and unmanned exploration ship carrying same |
| CN112776967A (en) * | 2021-02-10 | 2021-05-11 | 北京理工大学 | Axial-flow type double-duct water jet propeller |
| CN112776968A (en) * | 2021-02-10 | 2021-05-11 | 北京理工大学 | Double-duct water jet propulsion pump with adjustable rotating speed |
| CN112937819A (en) * | 2021-03-30 | 2021-06-11 | 大连海事大学 | Corrosion-resistant and impact-resistant marine hybrid fiber composite propeller blade and preparation method thereof |
| CN114476000A (en) * | 2022-02-23 | 2022-05-13 | 深圳市苇渡智能科技有限公司 | Blade structure based on improved usability, application method of blade structure and propeller |
| CN115195978A (en) * | 2022-07-06 | 2022-10-18 | 深圳职业技术学院 | Intelligent bionic robot fish |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105416538A (en) * | 2015-12-07 | 2016-03-23 | 哈尔滨工业大学 | Marine screw propeller with deformable paddles |
| WO2018206860A1 (en) * | 2017-05-11 | 2018-11-15 | Jose Buendia | Optimized helicopter - aeroplane - wing- propeller/rotor profiles |
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| CN111486050A (en) * | 2020-03-05 | 2020-08-04 | 天津大学 | Deformable power generation sail and unmanned exploration ship carrying same |
| CN112776967A (en) * | 2021-02-10 | 2021-05-11 | 北京理工大学 | Axial-flow type double-duct water jet propeller |
| CN112776968A (en) * | 2021-02-10 | 2021-05-11 | 北京理工大学 | Double-duct water jet propulsion pump with adjustable rotating speed |
| CN112776968B (en) * | 2021-02-10 | 2022-08-30 | 北京理工大学 | Double-duct water jet propulsion pump with adjustable rotating speed |
| CN112937819A (en) * | 2021-03-30 | 2021-06-11 | 大连海事大学 | Corrosion-resistant and impact-resistant marine hybrid fiber composite propeller blade and preparation method thereof |
| CN112937819B (en) * | 2021-03-30 | 2024-05-14 | 大连海事大学 | Corrosion-resistant impact-resistant marine hybrid fiber composite propeller blade and preparation method thereof |
| CN114476000A (en) * | 2022-02-23 | 2022-05-13 | 深圳市苇渡智能科技有限公司 | Blade structure based on improved usability, application method of blade structure and propeller |
| CN115195978A (en) * | 2022-07-06 | 2022-10-18 | 深圳职业技术学院 | Intelligent bionic robot fish |
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Application publication date: 20120704 |