CN102923285B - Vortex removal fin of propeller hub - Google Patents
Vortex removal fin of propeller hub Download PDFInfo
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- CN102923285B CN102923285B CN201210386010.4A CN201210386010A CN102923285B CN 102923285 B CN102923285 B CN 102923285B CN 201210386010 A CN201210386010 A CN 201210386010A CN 102923285 B CN102923285 B CN 102923285B
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- propeller
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- whirlpool
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Abstract
The invention relates to a vortex removal fin of a propeller hub. The vortex removal fin comprises a hub cap, wherein the hub cap is a conical cylinder, and a cavity is arranged in the cone; the cone comprises a front end face and a back end face; a groove is distributed on the circumference of the cone, which is close to the front end face, and a bolt hole is arranged between the inner wall of the groove and the front end face; the bottom of the groove is communicated with the cavity through a through hole; the center of the back end face is concave to form a pit, and a hoisting hole is arranged at the bottom of the pit; and fins are distributed on the circumference of the hub cap. According to the invention, the hub vortex generated by a propeller can be absorbed, so that the thrust of the propeller is improved.
Description
Technical field
The present invention relates to technical field of ships, relate in particular to screw propeller.
Background technology
Shipping is as the main transport strength of commodity logistics, in shipping process, consume a large amount of non-renewable energy resources amplification quantity dusty gas and greenhouse gases side by side, for this situation, International Maritime Organization (IMO) has released ship design energy efficiency indexes (EEDI), and executed in 2013, therefore, development marine energy-saving technology is extremely urgent.
Propeller hub disappears whirlpool fin for being arranged on after oar, absorb the device of hub whirlpool energy, when screw propeller work, each blade and current interact, line of centers taking blade baseline as whirlpool, has formed a string whirlpool of adhering to, because these votex sheet circular rectors radially change, form and gushed whirlpool at the lagging edge of blade subsequently, namely what is often called trailing vortex.He Gu whirlpool, tip whirlpool is all one of form of trailing vortex, and hub whirlpool is to have formed one very strong eddy current because the tangential velocity being produced by screw propeller induction at root of blade pools together at propeller hub rear, because pressure in vortex core is minimum, therefore easily form cavity, be called hub vortex cavity.
Patent document " with the propeller hub lid of fin keel " (CN 1031975A) is provided with a propeller spinner with fin keel on screw propeller.This patent is directly installed fin keel on traditional coniform fair water fin, and the effect that reclaims hub whirlpool energy is limited.
Summary of the invention
The applicant is for above-mentioned shortcoming of the prior art, and a kind of propeller hub whirlpool fin that disappears is provided, and can absorb the hub whirlpool that screw propeller is produced, and improves the thrust of screw propeller.
The technical solution adopted in the present invention is as follows:
The propeller hub whirlpool fin that disappears, comprises the hub cap being connected with propeller hub, and the tapered body of hub cap, is a cavity in described bullet; Described bullet comprises front end face and aft end face; Described bullet is fluted near the circle distribution of front end face, between the inwall of groove and front end face, has bolt hole; Groove is communicated with by through hole with cavity; The periphery of aft end face is straight end face, and the central indent of aft end face forms pit, and the bottom of pit is provided with hole for hoist; The circle distribution of hub cap has fin leaf, fin leaf be uniformly distributed on hub cap circumference and quantity identical with the quantity of propeller blade that connects of distributing on described propeller hub; The length of fin leaf is 15%～25% of propeller blade length; The difference of the pitch angle of fin leaf and propeller blade root geometric pitch angle is-18 °～10 °; 20 °～60 °, the oblique angle of tossing about of fin leaf;
Further technical scheme is as follows:
Described groove is evenly distributed on the periphery of hub cap;
Described through hole is positioned at two relative bottom portion of groove.
Beneficial effect of the present invention is: straight end face is made in traditional hub cap rear end, and indent, be conducive to hub cap pressure and recover; The whirlpool fin blade of disappearing adopts tosses about tiltedly, and with the propeller load variable pitch form matching that distributes, improve the organic efficiency to hub whirlpool, the thrust of raising screw propeller.
Brief description of the drawings
Fig. 1 is front view of the present invention.
Fig. 2 is the A-A cutaway view of Fig. 1.
Fig. 3 is that the present invention is installed on the block diagram on screw propeller.
Fig. 4 is the partial enlarged drawing of Fig. 3.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described.
As shown in Figures 1 to 4, the present invention includes hub cap 8, the tapered body of hub cap 8, is a cavity 3 in described bullet; Described bullet comprises front end face 10 and aft end face 9; Described bullet is fluted 5 near the circle distribution of front end face 10, between the inwall of groove 5 and front end face 10, has bolt hole 2, and the quantity of bolt hole 2 is identical with the number of openings on corresponding propeller hub 12 small end faces; Any two relative grooves 5 communicate by through hole 4 respectively with cavity 3; The periphery of aft end face (9) is straight end face, and the central indent of aft end face 9 forms pit 6, and the pressure that being provided with of pit 6 is beneficial to hub cap 8 recovers, and the bottom of pit 6 is provided with hole for hoist 7; The circle distribution of hub cap 8 is connected with fin leaf 1, fin leaf 1 be uniformly distributed on hub cap 8 circumference and the propeller hub 12 of quantity and screw propeller on the distribute quantity of the propeller blade 11 that connects identical; The length of fin leaf 1 is 15%～25% of propeller blade 11 length, and optimum value gets 20%; The difference of the pitch angle of fin leaf 1 and propeller blade 11 root geometric pitch angles is-18 °～10 °; The oblique angle of tossing about of fin leaf 1 is 20 °～60 °, and the angle at the oblique angle of tossing about changes with the difference of fin leaf 1 quantity; After hub cap 8 is mounted on propeller hub 12 by the perforate on propeller hub 12 small end faces, bolt hole 2 and screw, fin leaf 1 in the middle of two adjacent blades 11 root lagging edges 13, ensure propeller blade 11 root lagging edges 13 to fin leaf 1 axial distance of root guide margin 14 and the ratio of diameter of propeller between 0.030～0.045;
Action principle of the present invention is as follows:
Be installed on rear propeller at the whirlpool hub that will disappear, while being moved backward along propeller hub 12 places in whirlpool that blade 11 roots come off, run into fin 1 and interact with fin 1, the vortex part also being produced by fin 1 is offset simultaneously; Now the tangential velocity of blade 11 roots is weakened, and can not form very strong hub whirlpool, and the circumferential speed of being induced by hub whirlpool declines, and it is gentle stable that whole flow field becomes, the remitted its fury in whirlpool, the energy being associated with whirlpool thereby be able to recover on propeller hub 12; Therefore the mechanism of action of whirlpool fin of disappearing is: 1) reduce the effect of moment of torsion: induce the incoming flow of the propeller hub 12 at angle by receiving belt, produced moment of torsion and the thrust of fin 1.The moment of torsion of fin 1 is towards the hand of rotation of screw propeller, so screw propeller total torque reduces; 2) effect of increase propeller system entirety thrust: the whirlpool fin that disappears self is subject to friction force, produce negative thrust, but due to the interference effect of whirlpool fin to propeller wake field that disappear, the thrust of propeller blade 11 own is increased, simultaneously owing to having eliminated hub whirlpool, the pressure of rear propeller is reduced, thereby reduce the resistance of propeller hub 12, the thrust of whole propeller system is increased, and the degradation of energy that has reduced propeller hub 12 with this, has improved the propulsion coefficient of screw propeller.
More than describing is explanation of the invention, is not the restriction to invention, and limited range of the present invention, referring to claim, within protection scope of the present invention, can be done any type of amendment.
Claims (3)
1. the propeller hub whirlpool fin that disappears, is characterized in that: comprise the hub cap (8) being connected with propeller hub, the tapered body of hub cap (8), is a cavity (3) in described bullet; Described bullet comprises front end face (10) and aft end face (9); Described bullet, near the circle distribution of front end face (10) fluted (5), has bolt hole (2) between the inwall of groove (5) and front end face (10); Groove (5) is communicated with by through hole (4) with cavity (3); The periphery of aft end face (9) is straight end face, and the central indent of aft end face (9) forms pit (6), and the bottom of pit (6) is provided with hole for hoist (7); The circle distribution of hub cap (8) has fin leaf (1), fin leaf (1) be uniformly distributed on hub cap (8) circumference and quantity identical with the quantity of propeller blade (11) that connects of distributing on described propeller hub; The length of fin leaf (1) is 15%～25% of propeller blade (11) length; The difference of the pitch angle of fin leaf (1) and propeller blade (11) root geometric pitch angle is-18 °～10 °; 20 °～60 °, the oblique angle of tossing about of fin leaf (1).
2. the propeller hub as claimed in claim 1 whirlpool fin that disappears, is characterized in that: groove (5) is evenly distributed on the periphery of hub cap (8).
3. the propeller hub as claimed in claim 1 or 2 whirlpool fin that disappears, is characterized in that: through hole (4) is positioned at relative two grooves (5) bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210386010.4A CN102923285B (en) | 2012-10-12 | 2012-10-12 | Vortex removal fin of propeller hub |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210386010.4A CN102923285B (en) | 2012-10-12 | 2012-10-12 | Vortex removal fin of propeller hub |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102923285A CN102923285A (en) | 2013-02-13 |
| CN102923285B true CN102923285B (en) | 2014-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210386010.4A Active CN102923285B (en) | 2012-10-12 | 2012-10-12 | Vortex removal fin of propeller hub |
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| Country | Link |
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| CN (1) | CN102923285B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103803040A (en) * | 2014-01-24 | 2014-05-21 | 中国船舶重工集团公司第七○二研究所 | Propeller hub vortex eliminating wheel |
| CN103807084A (en) * | 2014-01-24 | 2014-05-21 | 中国船舶重工集团公司第七○二研究所 | Eddy elimination device in hydraulic turbine runner body |
| CN108016590B (en) * | 2017-11-08 | 2024-07-02 | 丰都县公路事务中心 | Screw convenient to handling |
| CN110316344A (en) * | 2019-07-09 | 2019-10-11 | 南京高精船用设备有限公司 | A kind of adjustable propeller whirlpool fin that disappears |
| CN110937090A (en) * | 2019-11-29 | 2020-03-31 | 南京盛航海运股份有限公司 | Ship propelling mechanism |
| CN111731463A (en) * | 2020-06-16 | 2020-10-02 | 杭州前进齿轮箱集团股份有限公司 | Vortex-eliminating fin structure with detachable fin blades |
| CN114834617B (en) * | 2022-03-10 | 2023-05-02 | 宜昌一凡船舶设计有限公司 | Welding type energy-saving vortex eliminating fin and production process thereof |
| CN115056950B (en) * | 2022-07-15 | 2024-06-25 | 上海外高桥造船有限公司 | Paddle root adjusting member and ship |
| CN115503916A (en) * | 2022-11-07 | 2022-12-23 | 深海技术科学太湖实验室 | Oar rudder cooperation structure for preventing rudder degradation |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1191789A (en) * | 1968-12-23 | 1970-05-13 | Ernest Muller | A Marine Propeller |
| US3947151A (en) * | 1973-12-19 | 1976-03-30 | Karl Gustav Herman Stillerud | Hollow hub marine propeller with anticavitation groove |
| CN1031975A (en) * | 1987-09-14 | 1989-03-29 | 大阪商船三井船舶株式会社 | The propeller hub lid of band fin keel |
| CN2835632Y (en) * | 2005-11-18 | 2006-11-08 | 上海贡新机电工程技术有限公司 | Screw propeller cap with helical fin |
| CN202368779U (en) * | 2011-12-12 | 2012-08-08 | 江苏华海船舶设计有限公司 | Energy-saving propeller |
| CN202368778U (en) * | 2011-12-12 | 2012-08-08 | 江苏华海船舶设计有限公司 | Combined energy-saving transport ship |
-
2012
- 2012-10-12 CN CN201210386010.4A patent/CN102923285B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1191789A (en) * | 1968-12-23 | 1970-05-13 | Ernest Muller | A Marine Propeller |
| US3947151A (en) * | 1973-12-19 | 1976-03-30 | Karl Gustav Herman Stillerud | Hollow hub marine propeller with anticavitation groove |
| CN1031975A (en) * | 1987-09-14 | 1989-03-29 | 大阪商船三井船舶株式会社 | The propeller hub lid of band fin keel |
| CN2835632Y (en) * | 2005-11-18 | 2006-11-08 | 上海贡新机电工程技术有限公司 | Screw propeller cap with helical fin |
| CN202368779U (en) * | 2011-12-12 | 2012-08-08 | 江苏华海船舶设计有限公司 | Energy-saving propeller |
| CN202368778U (en) * | 2011-12-12 | 2012-08-08 | 江苏华海船舶设计有限公司 | Combined energy-saving transport ship |
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| Publication number | Publication date |
|---|---|
| CN102923285A (en) | 2013-02-13 |
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Owner name: CSIC (SHANGHAI) ENERGY-SAVING TECHNOLOGY DEVELOPME Free format text: FORMER OWNER: THE 702TH RESEARCH INSTITUTE OF CHINA SHIPBUILDING INDUSTRY CORPORATION Effective date: 20150707 |
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Effective date of registration: 20150707 Address after: 200011, room 312, 313, 189 Kaohsiung Road, Shanghai, Huangpu District Patentee after: CSIC (SHANGHAI) ENERGY SAVING TECHNOLOGY DEVELOPMENT CO.,LTD. Address before: 214082 Wuxi, Jiangsu, Binhu District, Wuxi, box 116 Patentee before: The 702nd Research Institute of China Shipbuilding Industry Corporation |
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| CB03 | Change of inventor or designer information |
Inventor after: Zhou Weixin Inventor after: Xin Gongzheng Inventor after: Han Yongbo Inventor after: Ma Yan Inventor after: Huang Guofu Inventor after: Tang Denghai Inventor after: Dong Zhengqing Inventor after: Zhang Haimin Inventor before: Xin Gongzheng Inventor before: Han Yongbo Inventor before: Ma Yan Inventor before: Huang Guofu Inventor before: Tang Denghai Inventor before: Dong Zhengqing Inventor before: Zhang Haimin |
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| COR | Change of bibliographic data | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Room 312, 313, 189 Kaohsiung Road, Huangpu District, Shanghai 200011 Patentee after: China Shipbuilding (Shanghai) Energy Conservation Technology Co.,Ltd. Address before: Room 312, 313, 189 Kaohsiung Road, Huangpu District, Shanghai 200011 Patentee before: CSIC (SHANGHAI) ENERGY SAVING TECHNOLOGY DEVELOPMENT CO.,LTD. |
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| CP01 | Change in the name or title of a patent holder |