CN105216998A - A kind of marine propeller reducing noise - Google Patents
A kind of marine propeller reducing noise Download PDFInfo
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- CN105216998A CN105216998A CN201510785954.2A CN201510785954A CN105216998A CN 105216998 A CN105216998 A CN 105216998A CN 201510785954 A CN201510785954 A CN 201510785954A CN 105216998 A CN105216998 A CN 105216998A
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- wing flap
- propeller
- flexible hinge
- blade body
- driver
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Abstract
A kind of marine propeller reducing noise, the present invention relates to marine propeller, content of the present invention is the vibration noise problem in order to solve traditional marine propeller, but also not by changing the local shape of screw propeller in prior art, and then realize the method that the regular double vibrations in local reduces the noise of the vibration reduction screw propeller of screw propeller, it comprises propeller hub, multidirectional driver sub-system and multiple blade, each blade comprises amplification drive subsystem, wing flap, wing flap fixed link and blade body, each amplification drive subsystem comprises driver sub-system displacement drive link, flexible hinge plane amplifies driver plate and wing flap push rod, multidirectional driver sub-system comprises Drive Module and the three-dimensional multidirectional displacement amplifying mechanism of flexible hinge, the present invention is used for screw propeller and manufactures field.
Description
Technical field
The present invention relates to marine propeller, be specifically related to a kind of marine propeller reducing noise.
Background technology
The noise reduction technology of boats and ships is the emphasis of development in science and technology always, no matter be military aspect or civilian aspect, the vibration & noise of boats and ships causes great puzzlement all to engineering staff and manoeuvre of ship and passenger, some sound wave can cause the mood of people's agitation, and the vibration of boats and ships itself greatly reduces the quality taken, therefore, a kind of method that can reduce ship noise is found out imperative.And the vibration & noise of screw propeller account for very large ratio in the vibration & noise of boats and ships, if the vibration that can reduce screw propeller reduces the noise of screw propeller, then can play the effect of highly significant to the reduction of boats and ships overall vibration and noise.In order to the vibration reducing screw propeller reduces its noise, many scientific research personnel and R&D institution all furnish a huge amount of money for carry out the research and development of new type propeller, comprise: adjustable pitch propeller, composite propeller and shrouded propeller, but these screw propellers only has clear superiority in a certain particular aspects, though its Combination property increases, still have some aspects barely satisfactory.At present, by changing the local shape of screw propeller, realize vibration that the regular double vibrations in local reduces screw propeller and reduce the beyond doubt simpler and effective method of the noise of screw propeller, prior art also carries out the method for screw propeller vibration and noise reducing by solving problems.
Summary of the invention
Content of the present invention is the vibration noise problem in order to solve traditional marine propeller, but also not by changing the local shape of screw propeller in prior art, and then realize the method that the regular double vibrations in local reduces the noise of the vibration reduction screw propeller of screw propeller, and then provide a kind of marine propeller reducing noise.
The present invention is the technical scheme adopted that solves the problem:
A kind of marine propeller reducing noise, it comprises propeller hub, multidirectional driver sub-system and multiple blade, each blade comprises amplification drive subsystem, wing flap, wing flap fixed link and blade body, each amplification drive subsystem comprises driver sub-system displacement drive link, flexible hinge plane amplifies driver plate and wing flap push rod, and multidirectional driver sub-system comprises Drive Module and the three-dimensional multidirectional displacement amplifying mechanism of flexible hinge, multiple blade body is along the circumferential direction uniform to be fixedly mounted on propeller hub, each blade body is processed with wing flap mounting hole, each wing flap fixed link is inserted on wing flap, wing flap and wing flap fixed link are free-running fit, the two ends of each wing flap fixed link are fixedly mounted on wing flap mounting hole sidewall, it is set square that flexible hinge plane amplifies driver plate, and each angle of set square is provided with the first coupling end successively, second coupling end and the 3rd coupling end, one end of driver sub-system displacement drive link is connected with the first coupling end of set square, second coupling end of set square is connected with blade body, 3rd coupling end of set square is connected with one end of wing flap push rod, the other end of each driver sub-system displacement drive link is fixedly connected with the three-dimensional multidirectional displacement amplifying mechanism of flexible hinge, each wing flap push rod is arranged near the wing flap mounting hole of blade body, the other end and the wing flap of each wing flap push rod are rotationally connected, Drive Module is inlaid in the three-dimensional multidirectional displacement amplifying mechanism of flexible hinge, the three-dimensional multidirectional displacement amplifying mechanism of flexible hinge is arranged in propeller hub.
The invention has the beneficial effects as follows: drive wing flap 5 reciprocally swinging by multidirectional driver sub-system 2 and amplification drive subsystem, the reciprocally swinging scope of wing flap 5 is 10 °, deflection angle when regulation wing flap does not swing is 0 °, the reference angle that this angle swings as wing flap 5, wing flap 5 is swung to direction, screw propeller blade face and is defined as "+", swing to blade blade back direction and be defined as "-", the deflection angle of wing flap 5 can be made to realize the change of-5 ° ~+5 ° by design, and then realize the configuration change of propeller blade 3 local.By a set of feedback control system, the vibration signal of screw blade 3 under different operating mode is carried out scheduling real-time periodic collection, feed back after control system, control wing flap 5 and direction occurs on the contrary but the identical periodic wobble of frequency at next cycle and blade, to offset part blade amplitude, blade is vibrated reduce, the horsepower output of noise reduces, thus the overall noise level of screw propeller is obviously declined.
Accompanying drawing explanation
Fig. 1 is integral structure front view of the present invention, Fig. 2 is Drive Module 8, the three-dimensional multidirectional displacement amplifying mechanism 9 of flexible hinge, driver sub-system displacement drive link 10, flexible hinge plane amplify driver plate 11 and wing flap push rod 12 mounting structure schematic diagram, and Fig. 3 is the structural scheme of mechanism of wing flap 5.
Detailed description of the invention
Detailed description of the invention one: composition graphs 1-Fig. 3 illustrates present embodiment, a kind of marine propeller reducing noise described in present embodiment, it comprises propeller hub 1, multidirectional driver sub-system 2 and multiple blade 3, each blade 3 comprises amplification drive subsystem 4, wing flap 5, wing flap fixed link 6 and blade body 7, each amplification drive subsystem 4 comprises driver sub-system displacement drive link 10, flexible hinge plane amplifies driver plate 11 and wing flap push rod 12, and multidirectional driver sub-system 2 comprises Drive Module 8 and the three-dimensional multidirectional displacement amplifying mechanism 9 of flexible hinge, multiple blade body 7 is along the circumferential direction uniform to be fixedly mounted on propeller hub 1, each blade body 7 is processed with wing flap mounting hole, each wing flap fixed link 6 is inserted on wing flap 5, wing flap 5 and wing flap fixed link 6 are free-running fit, the two ends of each wing flap fixed link 6 are fixedly mounted on wing flap mounting hole sidewall, it is set square that flexible hinge plane amplifies driver plate 11, and each angle of set square is provided with the first coupling end 11-1 successively, second coupling end 11-2 and the 3rd coupling end 11-3, one end of driver sub-system displacement drive link 10 is connected with the first coupling end 11-1 of set square, second coupling end 11-2 of set square is connected with blade body 7, 3rd coupling end 11-3 of set square is connected with one end of wing flap push rod 12, the other end of each driver sub-system displacement drive link 10 is fixedly connected with the three-dimensional multidirectional displacement amplifying mechanism 9 of flexible hinge, each wing flap push rod 12 is arranged near the wing flap mounting hole of blade body 7, the other end and the wing flap 5 of each wing flap push rod 12 are rotationally connected, Drive Module 8 is inlaid in the three-dimensional multidirectional displacement amplifying mechanism 9 of flexible hinge, the three-dimensional multidirectional displacement amplifying mechanism 9 of flexible hinge is arranged in propeller hub 1.
Detailed description of the invention two: composition graphs 1 and Fig. 2 illustrate present embodiment, a kind of marine propeller reducing noise described in present embodiment, the three-dimensional multidirectional displacement amplifying mechanism 9 of described flexible hinge comprises two strip-shaped frames 13, and each strip-shaped frame 13 comprises an end plate 14 and multiple movable connecting rod 15, multiple movable connecting rod 15 is uniform to be arranged on end plate 14, one end of each movable connecting rod 15 all flexibly connects with end plate 14, two end plates 14 are oppositely arranged, and the other end of each movable connecting rod 15 is hinged with the other end of the movable connecting rod 15 on relative end plate 14 on each end plate 14, and two movable connecting rod 15 hinged places are connected with driver sub-system displacement drive link 10 respectively, the longitudinal travel of Drive Module 8 is transmitted on the driver sub-system displacement drive link 10 that is attached thereto after being amplified by the three-dimensional multidirectional displacement amplifying mechanism 9 of flexible hinge, amplify after driver plate 11 amplifies via flexible hinge plane and be transmitted to wing flap push rod 12, finally be transmitted on wing flap 5, promote wing flap 5 and realize double vibrations deflection, other is identical with detailed description of the invention one.
Detailed description of the invention three: composition graphs 1 and Fig. 2 illustrate present embodiment, a kind of marine propeller reducing noise described in present embodiment, described Drive Module 8 is magnetic telescopic driver module, piezoelectric actuator module, dielectric elastomer driver module, any one Drive Module in shape-memory polymer Drive Module or hydraulic actuating cylinder, thus realize high level of synchronization and the harmony of driving process, dielectric elastomer driver comprises acrylic acid actuator and silaatic actuator, shape-memory polymer comprises: shape memory epoxy, shape memory styrene, shape memory cyanate, shape memory bismaleimides and shape memory polyurethane, the reinforcing phase of shape-memory polymer based composites adopts high-intensity fiber to comprise: carbon fiber, silicon carbide fibre, alumina fibre, boron fiber, aramid fiber and hdpe fiber, other is identical with detailed description of the invention one.
Detailed description of the invention four: composition graphs 1 and Fig. 2 illustrate present embodiment, a kind of marine propeller reducing noise described in present embodiment, the two ends of described Drive Module 8 are fixedly mounted on two two end plates 14 be oppositely arranged respectively, and other is identical with detailed description of the invention one.
Detailed description of the invention five: composition graphs 1-Fig. 2 illustrates present embodiment, a kind of marine propeller reducing noise described in present embodiment, the number of described blade 3 is equal with the number of movable connecting rod 15, and other is identical with detailed description of the invention one.
Detailed description of the invention six: composition graphs 1-Fig. 2 illustrates present embodiment, a kind of marine propeller reducing noise described in present embodiment, described blade body 7 is processed with flexible hinge plane and amplifies driver plate mounting groove, flexible hinge plane is amplified driver plate mounting groove and is arranged near wing flap mounting hole, and other is identical with detailed description of the invention one.
Detailed description of the invention seven: composition graphs 1 and Fig. 3 illustrate present embodiment, a kind of marine propeller reducing noise described in present embodiment, described wing flap 5 is divided into first to face 5-1, second directly facing 5-2, the 3rd directly and face 5-3, lagging edge 16 and two side 5-4 directly; First to face the length that 5-1 and second faces 5-2 directly directly be 1/4 ~ 1/3 of screw propeller chord length, 3rd length facing 5-3 directly is 1/20 ~ 1/6 of screw propeller tip circular diameter length, wing flap 5 is arranged on 1/8 ~ 2/5 place that blade body 7 is tip circular diameter length apart from the distance of propeller hub 1, when tip circle and screw propeller rotate, circular trace drawn by blade blade tip, other is identical with detailed description of the invention one.
Detailed description of the invention eight: composition graphs 1-Fig. 2 illustrates present embodiment, a kind of marine propeller reducing noise described in present embodiment, described propeller hub 1 is the propeller hub that in the material be composited mutually by nickel, aluminium, bronze, titanium alloy material or resin matrix and fiber reinforcement, any one material is made, blade body 7 is blade bodies that in the material be composited mutually by nickel, aluminium, bronze, titanium alloy material or resin matrix and fiber reinforcement, any one material is made, and other is identical with detailed description of the invention one.
Detailed description of the invention nine: composition graphs 1-Fig. 3 illustrates present embodiment, a kind of marine propeller reducing noise described in present embodiment, monitored by the vibratory response produced propeller blade body 7, after monitor signal is fed back, controlling multidirectional driver sub-system 2 drives trailing edge flap to produce contrary same frequency swing response, thus realizing the reduction of screw propeller amplitude and the reduction of propeller noise, other is identical with detailed description of the invention one.
Detailed description of the invention ten: composition graphs 1-Fig. 3 illustrates present embodiment, a kind of marine propeller reducing noise described in present embodiment, it is right angle triangle that described flexible hinge plane amplifies driver plate 11, one end of driver sub-system displacement drive link 10 and the first coupling end 11-1 at acute angle place, set square place flexibly connect, second coupling end 11-2 of set square place right angle and blade body 7 are rotationally connected, the 3rd coupling end 11-3 at another acute angle place, set square place with flexibly connect with one end of wing flap push rod 12, other is identical with detailed description of the invention one.
Principle of work
When blade body 7 in work of the present invention vibrates down in working order, the periodic vibration signal gathered under this mode of operation is transmitted to external control system, after control system processes, multidirectional driver sub-system 2 is produced and the synperiodic vibration displacement of vibration signal, amplification drive subsystem 4 will be displaced through and be transmitted to wing flap 5, make it back and forth to deflect vibration at the reverse same frequency of initial point of the next cycle of blade vibration, thus offset the fractional amplitude of blade because of vibration generation, blade is vibrated weakened, further reduce the noise transmitting power of blade, the sound intensity of blade is declined, thus reduce the noise level of blade.
Claims (8)
1. one kind is reduced the marine propeller of noise, it is characterized in that: it comprises propeller hub (1), multidirectional driver sub-system (2) and multiple blade (3), each blade (3) comprises amplification drive subsystem (4), wing flap (5), wing flap fixed link (6) and blade body (7), each amplification drive subsystem (4) comprises driver sub-system displacement drive link (10), flexible hinge plane amplifies driver plate (11) and wing flap push rod (12), multidirectional driver sub-system (2) comprises Drive Module (8) and the three-dimensional multidirectional displacement amplifying mechanism (9) of flexible hinge, multiple blade body (7) is along the circumferential direction uniform to be fixedly mounted on propeller hub (1), each blade body (7) is processed with wing flap mounting hole, each wing flap fixed link (6) is inserted on wing flap (5), wing flap (5) and wing flap fixed link (6) are free-running fit, the two ends of each wing flap fixed link (6) are fixedly mounted on wing flap mounting hole sidewall, it is set square that flexible hinge plane amplifies driver plate (11), and each angle of set square is provided with the first coupling end (11-1) successively, second coupling end (11-2) and the 3rd coupling end (11-3), one end of driver sub-system displacement drive link (10) is connected with first coupling end (11-1) of set square, second coupling end (11-2) of set square is connected with blade body (7), 3rd coupling end (11-3) of set square is connected with one end of wing flap push rod (12), the other end of each driver sub-system displacement drive link (10) is fixedly connected with the three-dimensional multidirectional displacement amplifying mechanism (9) of flexible hinge, each wing flap push rod (12) is arranged near the wing flap mounting hole of blade body (7), the other end and the wing flap (5) of each wing flap push rod (12) are rotationally connected, Drive Module (8) is inlaid in the three-dimensional multidirectional displacement amplifying mechanism (9) of flexible hinge, the three-dimensional multidirectional displacement amplifying mechanism (9) of flexible hinge is arranged in propeller hub (1).
2. a kind of marine propeller reducing noise according to claim 1, it is characterized in that: the three-dimensional multidirectional displacement amplifying mechanism (9) of described flexible hinge comprises two strip-shaped frames (13), and each strip-shaped frame (13) comprises an end plate (14) and multiple movable connecting rod (15); Multiple movable connecting rod (15) is uniform to be arranged on end plate (14), one end of each movable connecting rod (15) all flexibly connects with end plate (14), two end plates (14) are oppositely arranged, and the upper other end of each movable connecting rod (15) of each end plate (14) is hinged with the other end of the movable connecting rod (15) on relative end plate (14), and two movable connecting rod (15) hinged places are connected with driver sub-system displacement drive link (10) respectively.
3. a kind of marine propeller reducing noise according to claim 1, is characterized in that: described Drive Module (8) is magnetic telescopic driver module, any one Drive Module in piezoelectric actuator module, dielectric elastomer driver module, shape-memory polymer Drive Module or hydraulic actuating cylinder.
4. a kind of marine propeller reducing noise according to Claims 2 or 3, is characterized in that: the two ends of described Drive Module (8) are fixedly mounted on two two end plates (14) be oppositely arranged respectively.
5. a kind of marine propeller reducing noise according to claim 1 or 2, is characterized in that: the number of described blade (3) is equal with the number of movable connecting rod (15).
6. a kind of marine propeller reducing noise according to claim 1 or 2, it is characterized in that: described blade body (7) is processed with flexible hinge plane and amplifies driver plate mounting groove, flexible hinge plane is amplified driver plate mounting groove and is arranged near wing flap mounting hole.
7. a kind of marine propeller reducing noise according to claim 1, is characterized in that: described wing flap (5) is divided into first to face (5-1), second directly facing (5-2), the 3rd directly and face (5-3), lagging edge (16) and two sides (5-4) directly; First to face the length that (5-1) and second face (5-2) directly directly be 1/4 ~ 1/3 of screw propeller chord length, 3rd length facing (5-3) directly is 1/20 ~ 1/6 of screw propeller tip circular diameter length, and wing flap (5) is arranged on 1/8 ~ 2/5 place that blade body (7) is tip circular diameter length apart from the distance of propeller hub (1).
8. a kind of marine propeller reducing noise according to claim 1, it is characterized in that: described propeller hub (1) is the propeller hub that in the material be composited mutually by nickel, aluminium, bronze, titanium alloy material or resin matrix and fiber reinforcement, any one material is made, blade body (7) is the blade body that in the material be composited mutually by nickel, aluminium, bronze, titanium alloy material or resin matrix and fiber reinforcement, any one material is made.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510785954.2A CN105216998B (en) | 2015-11-16 | 2015-11-16 | A kind of marine propeller for reducing noise |
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| CN201510785954.2A CN105216998B (en) | 2015-11-16 | 2015-11-16 | A kind of marine propeller for reducing noise |
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| CN105216998A true CN105216998A (en) | 2016-01-06 |
| CN105216998B CN105216998B (en) | 2017-06-20 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105966582A (en) * | 2016-05-25 | 2016-09-28 | 哈尔滨工业大学 | Ship transformable propeller based on bidirectional shape memory polymer composite propeller blades |
| CN106081031A (en) * | 2016-06-01 | 2016-11-09 | 哈尔滨工业大学 | A kind of vibration and noise reducing marine propeller of blade tip vibration |
| CN108263586A (en) * | 2017-12-29 | 2018-07-10 | 西北工业大学 | A kind of deformable submarine navigation device propeller |
| CN108397333A (en) * | 2018-01-05 | 2018-08-14 | 浙江大学 | A kind of deformable blade mechanism of energy by ocean current generating set |
| CN109533247A (en) * | 2018-11-19 | 2019-03-29 | 江苏科技大学 | The piezoelectricity vibration suppression system and vibration suppression method of marine propeller blade water elastic vibration |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106005247B (en) * | 2016-06-29 | 2017-10-20 | 芜湖福记恒机械有限公司 | A kind of selecting method of pitch set square |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5304038A (en) * | 1992-01-03 | 1994-04-19 | Bird-Johnson Company | Built-up marine propeller blade balancing |
| RU2117603C1 (en) * | 1996-06-25 | 1998-08-20 | Открытое акционерное общество "Балтийский завод" | Shipboard propeller blade |
| RU2130403C1 (en) * | 1997-03-27 | 1999-05-20 | Центральный научно-исследовательский институт им.акад.А.Н.Крылова | Shipboard propeller |
| CN1886293A (en) * | 2003-12-30 | 2006-12-27 | 船用螺旋桨有限公司变速螺旋桨构造 | Shock absorber for pitch-adjustable propeller with feathering blades, particularly for sailers |
| CN102574577A (en) * | 2009-09-02 | 2012-07-11 | 空中客车运营有限公司 | Flow body, high-lift flap or mainplane or fin of an aircraft, as well as a structure component having a flow body such as this |
-
2015
- 2015-11-16 CN CN201510785954.2A patent/CN105216998B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5304038A (en) * | 1992-01-03 | 1994-04-19 | Bird-Johnson Company | Built-up marine propeller blade balancing |
| RU2117603C1 (en) * | 1996-06-25 | 1998-08-20 | Открытое акционерное общество "Балтийский завод" | Shipboard propeller blade |
| RU2130403C1 (en) * | 1997-03-27 | 1999-05-20 | Центральный научно-исследовательский институт им.акад.А.Н.Крылова | Shipboard propeller |
| CN1886293A (en) * | 2003-12-30 | 2006-12-27 | 船用螺旋桨有限公司变速螺旋桨构造 | Shock absorber for pitch-adjustable propeller with feathering blades, particularly for sailers |
| CN102574577A (en) * | 2009-09-02 | 2012-07-11 | 空中客车运营有限公司 | Flow body, high-lift flap or mainplane or fin of an aircraft, as well as a structure component having a flow body such as this |
Non-Patent Citations (1)
| Title |
|---|
| 陈凡龙: "基于智能材料的可变形螺旋桨的研究", 《中国优秀硕士学位论文全文数据库 工程科技II辑》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105966582A (en) * | 2016-05-25 | 2016-09-28 | 哈尔滨工业大学 | Ship transformable propeller based on bidirectional shape memory polymer composite propeller blades |
| CN106081031A (en) * | 2016-06-01 | 2016-11-09 | 哈尔滨工业大学 | A kind of vibration and noise reducing marine propeller of blade tip vibration |
| CN108263586A (en) * | 2017-12-29 | 2018-07-10 | 西北工业大学 | A kind of deformable submarine navigation device propeller |
| CN108397333A (en) * | 2018-01-05 | 2018-08-14 | 浙江大学 | A kind of deformable blade mechanism of energy by ocean current generating set |
| CN109533247A (en) * | 2018-11-19 | 2019-03-29 | 江苏科技大学 | The piezoelectricity vibration suppression system and vibration suppression method of marine propeller blade water elastic vibration |
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