CN1817738A - Energy-saving screw propeller for ship - Google Patents

Energy-saving screw propeller for ship Download PDF

Info

Publication number
CN1817738A
CN1817738A CN 200610049366 CN200610049366A CN1817738A CN 1817738 A CN1817738 A CN 1817738A CN 200610049366 CN200610049366 CN 200610049366 CN 200610049366 A CN200610049366 A CN 200610049366A CN 1817738 A CN1817738 A CN 1817738A
Authority
CN
China
Prior art keywords
ship
blade
screw propeller
energy
saving screw
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.)
Granted
Application number
CN 200610049366
Other languages
Chinese (zh)
Other versions
CN100406347C (en
Inventor
李如忠
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to CNB2006100493663A priority Critical patent/CN100406347C/en
Publication of CN1817738A publication Critical patent/CN1817738A/en
Application granted granted Critical
Publication of CN100406347C publication Critical patent/CN100406347C/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Vibration Prevention Devices (AREA)
  • Prevention Of Electric Corrosion (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)

Abstract

An energy-saving propeller for ship is composed of a propeller hub and several blades. It features that each blade has a through hole between both surfaces to eliminate the difference between the front pressure and back pressure of blade, so eliminating the shape resistance and increasing speed of ship.

Description

Energy-saving screw propeller for ship
What technical field the present invention relates to is a kind of energy-saving screw propeller for ship, belongs to the propelling unit of boats and ships.
The propelling unit that the background technology 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 is at above-mentioned long-term unsolved defective, and 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 energy-saving screw propeller for ship that the specific embodiment 1, present embodiment provide has three blades on propeller hub, 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 (3)

1, a kind of energy-saving screw propeller for ship is made of propeller hub and blade, it is characterized in that the intercommunicating pore that has to connect blade face and blade back on each sheet blade.
2, energy-saving screw propeller for ship as claimed in claim 1 is characterized in that described intercommunicating pore is on blade root.
3, 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.
CNB2006100493663A 2006-01-23 2006-01-23 Energy-saving screw propeller for ship Expired - Fee Related CN100406347C (en)

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 true CN1817738A (en) 2006-08-16
CN100406347C 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)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2626841B1 (en) * 1988-02-05 1995-07-28 Onera (Off Nat Aerospatiale) PROFILES FOR FAIRED AERIAL 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
AUPO620197A0 (en) * 1997-04-14 1997-05-08 Leung, Chi Keung Extra byte propeller
US6467422B1 (en) * 1998-05-06 2002-10-22 Elms Austrialia Pty Ltd. Hydrofoil device

Also Published As

Publication number Publication date
CN100406347C (en) 2008-07-30

Similar Documents

Publication Publication Date Title
EP3495257A1 (en) Propeller setting small duct, and ship
EP3098158A1 (en) Stern duct, stern attachment, method of designing stern duct, and ship equipped with stern duct
US20090305584A1 (en) Semi-submerged propeller propulsion system of displacement and semi-displacement crafts
US8215255B2 (en) Ship rudder and ship provided therewith
Fukazawa et al. Full-scale gate rudder performance obtained from voyage data
JP6548062B2 (en) Stern duct, stern attachment, method of designing stern duct, and ship equipped with stern duct
CN212500968U (en) Low-vibration high-efficiency double-conduit paddle front energy-saving device
CN100406347C (en) Energy-saving screw propeller for ship
CN210284569U (en) Blade of marine propeller and marine propeller structure thereof
Sharifi et al. Various innovative technologic devices in shipping energy saving and diminish fuel consumption
CN111532408A (en) Low-vibration high-efficiency double-conduit paddle front energy-saving device
US4932908A (en) Energy efficient asymmetric pre-swirl vane and twisted propeller propulsion system
JP2008247050A (en) Vessel drag reducing device and vessel
KR20040106477A (en) Propeller shafts
EP0459076B1 (en) Stable racing catermaran with hydrofoil qualities
WO2001047770A1 (en) Partially submerged controllable pitch propeller fitted to a transom contoured thereto
CN203268305U (en) Ship-used energy-saving propeller
KR20120132080A (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
CN112429144A (en) Air guide sleeve for improving dead-wood rear flow field of high-speed ship and installation method thereof
CN111746749A (en) Rudder propeller matching system
KR20140015918A (en) A rudder for ship and a propulsion apparatus for ship
Lee et al. Development and application of energy saving devices to improve resistance and propulsion performance
CN203345154U (en) Double-bullet tail structure of vessel
Piskorz-Nalecki Effect of ship stern asymmetry on propulsion efficiency
KR20230092329A (en) Full spade rudder and ship having the same

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