CN100406347C - Energy-saving screw propeller for ship - Google Patents
Energy-saving screw propeller for ship Download PDFInfo
- Publication number
- CN100406347C CN100406347C CNB2006100493663A CN200610049366A CN100406347C CN 100406347 C CN100406347 C CN 100406347C CN B2006100493663 A CNB2006100493663 A CN B2006100493663A CN 200610049366 A CN200610049366 A CN 200610049366A CN 100406347 C CN100406347 C CN 100406347C
- Authority
- CN
- China
- Prior art keywords
- ship
- blade
- pressure
- screw propeller
- propeller
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
- Prevention Of Electric Corrosion (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The present invention provides an energy-saving screw propeller for a ship, which is composed of a propeller hub (1) and propeller blades (2), wherein a communication hole (3) for connecting a blade surface and a blade back is arranged on each propeller blade. When a ship is in navigation, a vortex low-pressure region is formed between the suction force of the blade back of the propeller and a ship tail. The lower the pressure in the region, the larger the pressure difference between the low-pressure region and a high-pressure region outside a pressure surface, and the larger the suction force, i.e. form drag of the low-pressure region. Therefore, the navigation speed of the ship is restricted directly. The energy-saving screw propeller for a ship provided by the present invention is provided with a communication hole on each blade for connecting the blade surface and the blade back, so that the pressure regions with different pressure can be communicated to each other to achieve balance. The form drag can be reduced or eliminated. The navigation speed is increased necessarily under the same host rotational speed. After the energy-saving screw propeller for a ship provided by the present invention is used by the same ship according to a real ship test, compared with a ship using a screw propeller without a communication hole, the navigation speed of the ship is increased by 10 percent or so under the same host rotational speed.
Description
Technical field
What the present invention relates to is a kind of energy-saving screw propeller for ship, belongs to the propelling unit of boats and ships.
Background technology
The propelling unit that screw propeller advances as boats and ships, its work efficiency are the principal elements that influences shipping sail speed.Boats and ships the time always will be subjected to resistance aspect three in navigation, that is: friction drag, wave making resistance and form resistance, and the drag effects of these three aspects has also limited the route speed of boats and ships.Wherein friction drag depends on the friction face size of lower apron, and relevant with the degree of finish of boats and ships lower apron; Stormy waves size when wave making resistance and navigation has direct relation; Form resistance then is relevant with the aspect ratio of ship.During ship's navigation, produce a meiobar between stern and the blade back, it with the propeller blade face on high pressure between tangible difference of pressure of formation, the difference of this difference of pressure and the speed of a ship or plane and boats and ships shape are wide proportional, this difference is big more, and the form resistance of ship's navigation is also big more.After the length of ship was determined in other words, width was wide more, and the speed of a ship or plane is fast more, and form resistance is also big more.At present disclosed various energy-saving screw propeller for ship are all transformed on blade plan form etc. basically, as number of patent application is that 200410022947.9 Chinese patent application " concavo-convex blade and concavo-convex screw propeller " is disclosed, can not really eliminate the form resistance of ship's navigation.
Summary of the invention
At above-mentioned long-term unsolved defective, it is structure how to pass through to change energy-saving screw propeller for ship that the present invention will solve, and eliminates this technical matters of form resistance of ship's navigation, and proposes a kind of new energy-saving screw propeller for ship.
Energy-saving screw propeller for ship provided by the invention is made of propeller hub and blade, and an intercommunicating pore that connects blade face and blade back is arranged on each sheet blade.
Ship is when navigation, form an eddy current meiobar between the suction of the blade back of screw propeller and the stern, the pressure in this district is low more, and it is just big more with higher-pressure region pressure reduction beyond the acting face so, its suction (being form resistance) is also just big more, and this has just directly limited the route speed of ship.Energy-saving screw propeller for ship provided by the invention has an intercommunicating pore that connects blade face and blade back on each sheet blade, make to be connected between two different pressure spans of height and to reach balance, and form resistance is is also just reduced or eliminated.Under identical engine speed, the speed of a ship or plane must improve.According to full scale test, after same ship used energy-saving screw propeller for ship provided by the invention, under identical engine speed, the speed of a ship or plane improved about 10% than the screw propeller that uses no intercommunicating pore.
Some vibrations always appear in ship when navigation simultaneously, this is that " water hammer " that occur when pressure reduction increases between blade face and the blade back causes: the water of higher-pressure region rushes at meiobar under the effect of crossing current, hull is impacted, fierce vibration occurs, this is called " liquid hammer " again.When this abnormal vibrations occurring, solution in the past is to have only the engine speed of reduction or with the inclined to one side slightly to the left or to the right angle of rudder (promptly turning), vibration is eliminated.This mechanism is that the speed of a ship or plane has also reduced when reducing engine speed, and the pressure of meiobar promotes to some extent so, and the pressure reduction of it and higher-pressure region has also just diminished.After pressure reduction diminished, this impact also just obtained reducing or disappearing, and vibration has also just been eliminated.In like manner, if during with the inclined to one side to the left or to the right angle of rudder, the water of ship both sides to afterbody flow run into rudder blade after, because of being subjected to the resistance reason of rudder blade, make the boost in pressure of meiobar, difference of pressure also diminishes thereupon, has also just eliminated so vibrate.And after increasing an intercommunicating pore on the blade of each sheet screw propeller.When screw propeller was worked, the water at place, blade face directly entered the blade back meiobar by intercommunicating pore, reached two districts and linked to each other, and made the boost in pressure of meiobar, and the pressure between two districts balances each other substantially so, and vibration also is eliminated.This also is confirmed in full scale test.Screw propeller equilbrium running in the water of balance in addition, the load of main frame just is improved, and can not impacted.
In addition, energy-saving screw propeller for ship provided by the invention, because after height two district's balances, screw propeller work balance, this makes, and the wearing and tearing of tail bearing alleviate relatively, the relative prolongation in service life of the water sealing device of bearing and tailing axle; Can not make the pressure reduction in two intervals excessive, cause lighter floating debris to be inhaled into meiobar, stop the phenomenon of tying screw propeller to occur; Changed self oscillation frequency of oar, can reduce being subjected to the noise that water impact is sent when working from screw propeller; The overtaking wave that elimination produces because of pressure reduction.
Description of drawings
Fig. 1 is the front view of one embodiment of the invention;
Fig. 2 partly cuts open figure for overlooking of Fig. 1.
The specific embodiment
1, the energy-saving screw propeller for ship that provides of present embodiment has three blades on propeller hub, has beaten an intercommunicating pore that connects blade face and blade back on each blade.
2, the energy-saving screw propeller for ship that provides of present embodiment, as shown in Figure 1, 2, four blades 2 are arranged on propeller hub 1, on each blade, beaten an intercommunicating pore 3 that connects blade face a and blade back b, and described intercommunicating pore is on blade root, and intercommunicating pore two ends and blade face and blade back have the mouth that falls that seamlessly transits.
3, test ship displacement is 600 tons, and Design Speed is 11.5 joints, and 400 rev/mins of engine speeds, power are 441 kilowatts.Make a call to a diameter and be 31.5 millimeters intercommunicating pore on each blade of the former screw propeller 0.2r of this ship place, the two ends rounding is reequiped.With the identical conditions trial voyage or flight, ship's speed is brought up to 13.8 joints (380 rev/mins of engine speeds) from 10.5 joints (390 rev/mins of engine speeds) before and after repacking, and ship's speed is measured with satellite navigator.Chatter phenomena does not take place.
Claims (2)
1. an energy-saving screw propeller for ship is made of propeller hub and blade, it is characterized in that having on each sheet blade the intercommunicating pore of a connection blade face and blade back, and described intercommunicating pore is on blade root.
2. energy-saving screw propeller for ship as claimed in claim 1 is characterized in that described intercommunicating pore two ends and blade face and blade back have the mouth that falls that seamlessly transits.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100493663A CN100406347C (en) | 2006-01-23 | 2006-01-23 | Energy-saving screw propeller for ship |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100493663A CN100406347C (en) | 2006-01-23 | 2006-01-23 | Energy-saving screw propeller for ship |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1817738A CN1817738A (en) | 2006-08-16 |
| CN100406347C true CN100406347C (en) | 2008-07-30 |
Family
ID=36917992
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100493663A Expired - Fee Related CN100406347C (en) | 2006-01-23 | 2006-01-23 | Energy-saving screw propeller for ship |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100406347C (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1010933B (en) * | 1988-02-05 | 1990-12-26 | 国家宇航学术及研究局 | Sections for shrouded propeller blade |
| CN1221379A (en) * | 1996-04-15 | 1999-06-30 | 布隆福斯国际股份有限公司 | Blade for ship propellers |
| CN1114544C (en) * | 1997-04-14 | 2003-07-16 | 梁志强 | Improved fluid displacing blade |
| CN1121331C (en) * | 1998-05-06 | 2003-09-17 | 埃尔姆斯澳大利亚有限公司 | Improved hydrofoil device |
-
2006
- 2006-01-23 CN CNB2006100493663A patent/CN100406347C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1010933B (en) * | 1988-02-05 | 1990-12-26 | 国家宇航学术及研究局 | Sections for shrouded propeller blade |
| CN1221379A (en) * | 1996-04-15 | 1999-06-30 | 布隆福斯国际股份有限公司 | Blade for ship propellers |
| CN1114544C (en) * | 1997-04-14 | 2003-07-16 | 梁志强 | Improved fluid displacing blade |
| CN1121331C (en) * | 1998-05-06 | 2003-09-17 | 埃尔姆斯澳大利亚有限公司 | Improved hydrofoil device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1817738A (en) | 2006-08-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2738084B1 (en) | Propeller with small duct, and ship | |
| KR200395385Y1 (en) | Rudder for Ship | |
| CN219077412U (en) | Ship body and deep V-shaped folded angle half-small waterplane double-body ship | |
| US20100186648A1 (en) | Ship rudder and ship provided therewith | |
| Fukazawa et al. | Full-scale gate rudder performance obtained from voyage data | |
| CN100406347C (en) | Energy-saving screw propeller for ship | |
| CN210284569U (en) | Blade of marine propeller and marine propeller structure thereof | |
| EP1507701B1 (en) | Propeller shafts | |
| KR20120098941A (en) | Thruster with duct attached and vessel comprising same | |
| CN212500968U (en) | Low-vibration high-efficiency double-conduit paddle front energy-saving device | |
| CN112429144B (en) | Installation method of flow guide cover for improving flow field behind standing timber of high-speed ship | |
| KR101253880B1 (en) | A method of manufacturing a ship propulsion device with propeller blade tip shrouded with curved plate which is in groove on the inner side of duct | |
| KR20150110594A (en) | Ship with small duct and method for assessing application of small duct on ship | |
| WO2001047770A1 (en) | Partially submerged controllable pitch propeller fitted to a transom contoured thereto | |
| CN203268305U (en) | Ship-used energy-saving propeller | |
| CN111746749A (en) | Rudder propeller matching system | |
| CN201447045U (en) | Marine vortex generator | |
| KR20140015918A (en) | A rudder for ship and a propulsion apparatus for ship | |
| CN115042910B (en) | Marine asymmetric energy-saving wing and ship | |
| Lee et al. | Development and application of energy saving devices to improve resistance and propulsion performance | |
| KR102305888B1 (en) | Steering apparatus and ship having the same | |
| KR20230092329A (en) | Full spade rudder and ship having the same | |
| Piskorz-Nalecki | Effect of ship stern asymmetry on propulsion efficiency | |
| JP4362519B2 (en) | Marine single-axis two-rudder system and single-axis two-rudder ship | |
| KR101402432B1 (en) | A rudder for ship and a propulsion apparatus for ship |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080730 Termination date: 20120123 |