CN1221379A - Blade for ship propellers - Google Patents

Blade for ship propellers Download PDF

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Publication number
CN1221379A
CN1221379A CN97195287A CN97195287A CN1221379A CN 1221379 A CN1221379 A CN 1221379A CN 97195287 A CN97195287 A CN 97195287A CN 97195287 A CN97195287 A CN 97195287A CN 1221379 A CN1221379 A CN 1221379A
Authority
CN
China
Prior art keywords
blade
fin
eddy current
ship propellers
reducing
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.)
Pending
Application number
CN97195287A
Other languages
Chinese (zh)
Inventor
D·于尔根斯
C·蒂默
H·G·埃鲁斯
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.)
Blohm and Voss International GmbH
Original Assignee
Blohm and Voss International GmbH
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 Blohm and Voss International GmbH filed Critical Blohm and Voss International GmbH
Publication of CN1221379A publication Critical patent/CN1221379A/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H1/00—Propulsive elements directly acting on water
    • B63H1/02—Propulsive elements directly acting on water of rotary type
    • B63H1/12—Propulsive elements directly acting on water of rotary type with rotation axis substantially in propulsive direction
    • B63H1/14—Propellers
    • B63H1/26—Blades
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C11/00—Propellers, e.g. of ducted type; Features common to propellers and rotors for rotorcraft
    • B64C11/16—Blades
    • B64C11/18—Aerodynamic features

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Wind Motors (AREA)

Abstract

A blade for ship propellers is provided in the area of its outer radius with means for reducing the induced turbulence. The means for reducing the induced turbulence consist of several ribs spaced apart and arranged next to each other in an approximately parallel direction to the generatrix of the propeller blade. The ribs project freely outwards in the radial direction from the end of the propeller blade.

Description

Blade for ship propellers
The present invention relates to a kind of blade for ship propellers with the described feature of claim 1 preamble.
By also having caused so-called " most advanced and sophisticated eddy current " simultaneously than the circulation that has caused outer blade end in the suction side of blade or the different pressures of pressure side.The suffered load of screw propeller is high more, and then the pressure gradient between pressure side and the suction side is big more, and then the energy of the eddy current that is caused is high more.According to the situation of charge capacity, the waste of power that is caused by eddy effect is up to 15%.The device with the described feature of claim 1 preamble so far is based on end of blade sheet principle of work.Outer blade end has a disk or blade sections, and it distributes vertically perpendicular to blade face ground and be outstanding on suction side or pressure side direction.So just can weaken the circulation and and then the reduction eddy current loss at equilibrium of pressure or minimizing blade end place.The flexible program of this mode of operation is exactly so-called " most advanced and sophisticated empennage-type screw propeller ", wherein up to 90 degree blade end is axially swelled and has also obtained end of blade sheet effect thus.A major defect of this known devices is exactly out-of-proportion high tooling cost.In addition, because the friction on additional surface has increased resisting moment, so it is lower always to produce effects.
Task of the present invention is to avoid above-mentioned deficiency also to improve as claim 1 device as described in the preamble in view of the above, thereby can obtain significantly to produce effects than the lowland by technical costs.
According to the present invention, so finish above-mentioned task, promptly reducing the device that causes eddy current is that the fin that is parallel to the blade bus that be arranged side by side by many each intervals and approximate constitutes, described fin freely stretches out radially outwardly from the blade end.
In the accompanying drawings, show device of the present invention, wherein saved CONSTRUCTED SPECIFICATION in conjunction with several sketches.
Fig. 1 is the section drawing of with ribbing propeller blade.
Fig. 2 is the front view of with ribbing propeller blade.
Fig. 3 is the front view of propeller blade of with ribbing and seam.
Can reduce eddy current loss by device of the present invention.The helical surface of screw propeller be rotate around anchor shaft by one and constitute along this straight line with not variable Rate stepping.The straight line of Chan Shenging is denoted as bus 1 like this.Obviously reduced the loss of energy of free vortex flow by the approximate fin R1-R4 that is parallel to bus 1 setting.Eddy current energy and its radius cube are approximated to ratio.This is to produce according to the geometric configuration for the treatment of the circulation limit.Because the shape of propeller blade 2 is divided into many fin R1-R4 in the outer end, so on the free vortex flow position, caused many little eddy current accordingly with the kerf spacing of fin number and fin.For example, be 1.0 (I by single radius 3=1) eddy current is initiated ground, is 0.25 (4*0.25 at four radiuses 3=0.0625) loss of energy in the branch eddy current is reduced to 6%-7%.Fin is also by determining that according to blade profile and bus 1 mode of fin R1-R4 direction has produced buoyancy.Simultaneously, can be by stitching 3 expansion and the distribution of pressures that advantageously influence critical layer.Mode that can technology designs thicklyer the blade district by the system of milling simply or the mode by the prefabricated fin cover of suit process fin.

Claims (2)

1. blade for ship propellers, it has the device that reduces the initiation eddy current in the radial regions outside, it is characterized in that, reducing the device that causes eddy current is that the fin (R1-R4) that is parallel to blade (2) bus (1) that be arranged side by side by many each intervals and approximate constitutes, and described fin freely stretches out radially outwardly from the blade end.
2. blade as claimed in claim 1 is characterized in that, described fin (R1-R4) tangentially is separated by one or more seam (3).
CN97195287A 1996-04-15 1997-04-10 Blade for ship propellers Pending CN1221379A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19614851.0 1996-04-15
DE19614851 1996-04-15

Publications (1)

Publication Number Publication Date
CN1221379A true CN1221379A (en) 1999-06-30

Family

ID=7791326

Family Applications (1)

Application Number Title Priority Date Filing Date
CN97195287A Pending CN1221379A (en) 1996-04-15 1997-04-10 Blade for ship propellers

Country Status (6)

Country Link
EP (1) EP0894066A1 (en)
JP (1) JP2000508271A (en)
KR (1) KR20000005416A (en)
CN (1) CN1221379A (en)
DE (1) DE19780302D2 (en)
WO (1) WO1997038897A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100406347C (en) * 2006-01-23 2008-07-30 李如忠 Energy-saving screw propeller for ship
CN105438424A (en) * 2015-11-23 2016-03-30 镇江同舟螺旋桨有限公司 Energy-saving marine propeller with tip folding wing

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GR990100151A (en) * 1999-05-06 2001-01-31 Opener of the twisting of whirls
US7049324B1 (en) 1999-11-15 2006-05-23 Ashis Kumar Saha Triazoles as farnesyl transferase inhibitors
KR101225177B1 (en) 2010-07-16 2013-01-22 삼성중공업 주식회사 Propeller and ship including the same

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB196410A (en) * 1922-02-01 1923-04-26 William Robert Douglas Shaw Improvements in wings for aerial machines
DE3874170D1 (en) * 1987-03-13 1992-10-08 Guenther Spranger WING-LIKE PROFILED DEVICE FLOWED BY A GAS OR FLUID AND WITH STRIP-SHAPED PROFILED WINGS TO IMPROVE THE EFFICIENCY.
DE4202745C2 (en) * 1991-09-04 1995-04-13 Blohm Voss Ag Wing, in particular stabilizer fin for ships

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100406347C (en) * 2006-01-23 2008-07-30 李如忠 Energy-saving screw propeller for ship
CN105438424A (en) * 2015-11-23 2016-03-30 镇江同舟螺旋桨有限公司 Energy-saving marine propeller with tip folding wing
CN105438424B (en) * 2015-11-23 2017-11-21 镇江同舟螺旋桨有限公司 A kind of energy-conservation marine propeller of ending flap

Also Published As

Publication number Publication date
EP0894066A1 (en) 1999-02-03
WO1997038897A1 (en) 1997-10-23
KR20000005416A (en) 2000-01-25
JP2000508271A (en) 2000-07-04
DE19780302D2 (en) 1999-04-29

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Legal Events

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C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C02 Deemed withdrawal of patent application after publication (patent law 2001)
WD01 Invention patent application deemed withdrawn after publication