WO2010016155A1 - Hélice à érosion par cavitation limitée - Google Patents

Hélice à érosion par cavitation limitée Download PDF

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Publication number
WO2010016155A1
WO2010016155A1 PCT/JP2008/064568 JP2008064568W WO2010016155A1 WO 2010016155 A1 WO2010016155 A1 WO 2010016155A1 JP 2008064568 W JP2008064568 W JP 2008064568W WO 2010016155 A1 WO2010016155 A1 WO 2010016155A1
Authority
WO
WIPO (PCT)
Prior art keywords
cavitation
propeller
pitch
wing
constraint
Prior art date
Application number
PCT/JP2008/064568
Other languages
English (en)
Japanese (ja)
Inventor
正三郎 山崎
Original Assignee
ナカシマプロペラ株式会社
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 ナカシマプロペラ株式会社 filed Critical ナカシマプロペラ株式会社
Priority to PCT/JP2008/064568 priority Critical patent/WO2010016155A1/fr
Publication of WO2010016155A1 publication Critical patent/WO2010016155A1/fr

Links

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
    • B63H1/18—Propellers with means for diminishing cavitation, e.g. supercavitation
    • 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

Definitions

  • This book relates to cavitation processes that suppress john based on cavitation.
  • Cavitation occurs when the ship rotates inside. This cavitation flows on the surface of the propeller (the decrease in force due to the speed of the cavitation reduces the vapor pressure of the water, and bubbles are generated in the water, so the pits are inevitably larger or smaller in size.
  • the surface of the air bubbles is caused by the air bubbles, causing vibrations and noise in the hull, and lowering the thrust. The most important thing was to set the pitch rake skies and other factors as factors that determine the shape of the prop to a difficult value due to the occurrence of cavitation.
  • This utility model H 00 report shows that a constant is formed at the end, and it is proposed that the end number be set larger than the can of the 0 ⁇ R 0 RR propeller. .
  • the tip is applied, the force increases with respect to the lift force, which leads to lower efficiency, and if the camber is made larger, the force difference from the fibreback increases, leading to the addition of cavitation.
  • the end members are properly combined, the efficiency of the production will be improved while suppressing the generation of the cavity.
  • the value of the number at this point is too large, and it may be possible to increase vitation and not stop cavitation.
  • the ratio of the edge pitch to the half 0 ⁇ 7 R pitch of the wing is kept to 0 ⁇ down, the ratio of the spread is not lowered. It is assumed that bittation, ie, can be suppressed. However, this may be effective when the number of cavitations is small, but it may be counterproductive when considering the fact that cavitation occurs not only in the vicinity but also in the vicinity as the number of cavitations increases.
  • the means of 0m of the part which entered the side from the edge at the position of 0 ⁇ R ⁇ R described in the claim is 0m, and the end of the end indicated in the claim is 0 ⁇
  • Means that are cambers in the 0 R position means that the end of the claim is “0, 0, R” Claim; P, P, “P, P,” with the pitch of 0, H is 0, P, P, Provide a means that is 1.
  • Fig. 1 is a cross-sectional view of the blade at a radius of 0 ⁇ 0R R.
  • Fig. 1 is a diagram showing the half of the blade.
  • Fig. 1 is a pitch diagram showing the relationship with the half pitch of the blade.
  • Fig. 1 is a shape according to the present invention. This is an image of the cavitation situation showing a prop with and without a cavitation. Of the issue
  • FIG. 1 is a cross-sectional view of the wing at a radius of 0 ⁇ RR, and is a cloth diagram showing the half of the wing, and is a pitch cloth showing the half-pitch of the wing.
  • the propeller wings related to are set as follows. As is literally, the direction at a certain radius is a combination of the pitch P and the beginning.
  • the 1,,, and R propellers to 0 ⁇ 0 ⁇ . For example, it is set like a curve, which is the straight line that is parallel to when the radius is R. This line is set to propeller z so that R is greater than 0 and 0 and below.
  • the edge width is set to zero in order to increase the efficiency by suppressing the force against the lift force. Give up.
  • a can can be provided by adding a sway to the end.
  • the end can is made larger and set to the above range. It is a large can with a tail tail connected to the front 1 in the cross section of a wing with a back surface of 1. And the can at the end is set to 0 ⁇ 7R 0 ⁇ R
  • the can is larger than the 0 ⁇ 7R 0 ⁇ R can, the pressure difference on the feedback surface becomes too large and the This is because it has the potential to lead to a smooth disappearance of the station.
  • • H is more preferably a can at 0 R.
  • can means that the can wire is behind the tail, and it is preferable that the camber at the end becomes “because the destruction of the cavitage occurs early.
  • the part that entered the m side from the edge between the radius 0 and R 0 R is set to 0 above.
  • Prop cavitation is caused by, especially if the amount of cavitation is more than the above, it will be possible to suppress wing bending in this amount and minimize adverse effects. It becomes a means.
  • P ⁇ P P propeller pitch of the 0 ⁇ R pitch to be within the range of 0 ⁇ 7 P ⁇ 1 ⁇ . For example, if it hits a curve, it should be between the curves with the 101 pitch fabric. In the future, in order to reduce cavitation near the edge, the edge pitch is reduced to a tip, but in the case of a clear pepper, the edge pitch is increased to a tip. Cavitation can be tolerated by tipping, because it can be collected and the duration can be increased. However, beyond this range, cavitation is too strong, and if it is small, the tip is too strong. In order to weaken the tip, it is preferable to exceed P • P0 •.
  • ⁇ P is ⁇ Slightly off the 7th edge.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

L'invention porte sur une hélice à érosion par cavitation limitée, qui limite l'érosion provoquée par la cavitation survenant dans une hélice d'un navire. Le bord d'attaque d'une pale est élargi, et un pas géométrique relatif d'une cambrure au bord d'attaque de la pale, du bord d'attaque de la pale et d'une position radiale de l'hélice de 0,7 R est réglé à une valeur spécifique. Un tel réglage retarde l'extinction de la cavitation survenant sur une surface de pale, et la cavitation est forcée de passer à travers la surface de pale entretemps, pour ne jamais heurter la surface de pale. Par conséquent, l'érosion est limitée.
PCT/JP2008/064568 2008-08-07 2008-08-07 Hélice à érosion par cavitation limitée WO2010016155A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2008/064568 WO2010016155A1 (fr) 2008-08-07 2008-08-07 Hélice à érosion par cavitation limitée

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2008/064568 WO2010016155A1 (fr) 2008-08-07 2008-08-07 Hélice à érosion par cavitation limitée

Publications (1)

Publication Number Publication Date
WO2010016155A1 true WO2010016155A1 (fr) 2010-02-11

Family

ID=41663384

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/064568 WO2010016155A1 (fr) 2008-08-07 2008-08-07 Hélice à érosion par cavitation limitée

Country Status (1)

Country Link
WO (1) WO2010016155A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012053378A1 (fr) * 2010-10-19 2012-04-26 三菱重工業株式会社 Dispositif de propulsion et navire utilisant ce dernier

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0519092U (ja) * 1991-03-04 1993-03-09 三菱重工業株式会社 翼先端部に高キヤンバ量と翼幅とをそなえたプロペラ翼
JPH1143096A (ja) * 1997-07-25 1999-02-16 Mitsubishi Heavy Ind Ltd プロペラ
JP2002264893A (ja) * 2001-03-05 2002-09-18 Nakashima Propeller Co Ltd プロペラ
JP2005112257A (ja) * 2003-10-10 2005-04-28 Shin Kurushima Dockyard Co Ltd プロペラ
JP2006015972A (ja) * 2004-05-31 2006-01-19 Mitsubishi Heavy Ind Ltd プロペラ、及び、プロペラ起振力の抑制方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0519092U (ja) * 1991-03-04 1993-03-09 三菱重工業株式会社 翼先端部に高キヤンバ量と翼幅とをそなえたプロペラ翼
JPH1143096A (ja) * 1997-07-25 1999-02-16 Mitsubishi Heavy Ind Ltd プロペラ
JP2002264893A (ja) * 2001-03-05 2002-09-18 Nakashima Propeller Co Ltd プロペラ
JP2005112257A (ja) * 2003-10-10 2005-04-28 Shin Kurushima Dockyard Co Ltd プロペラ
JP2006015972A (ja) * 2004-05-31 2006-01-19 Mitsubishi Heavy Ind Ltd プロペラ、及び、プロペラ起振力の抑制方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012053378A1 (fr) * 2010-10-19 2012-04-26 三菱重工業株式会社 Dispositif de propulsion et navire utilisant ce dernier
US9021970B2 (en) 2010-10-19 2015-05-05 Mitsubishi Heavy Industries, Ltd. Propulsion device and ship using the same

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