FR2662418A1 - Anti-cavitation of a retractable anti-drift surface - Google Patents

Anti-cavitation of a retractable anti-drift surface Download PDF

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Publication number
FR2662418A1
FR2662418A1 FR9006754A FR9006754A FR2662418A1 FR 2662418 A1 FR2662418 A1 FR 2662418A1 FR 9006754 A FR9006754 A FR 9006754A FR 9006754 A FR9006754 A FR 9006754A FR 2662418 A1 FR2662418 A1 FR 2662418A1
Authority
FR
France
Prior art keywords
profile
hull
channel
orifice
drift
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.)
Withdrawn
Application number
FR9006754A
Other languages
French (fr)
Inventor
Moulin Olivier
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 FR9006754A priority Critical patent/FR2662418A1/en
Publication of FR2662418A1 publication Critical patent/FR2662418A1/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B41/00—Drop keels, e.g. centre boards or side boards ; Collapsible keels, or the like, e.g. telescopically; Longitudinally split hinged keels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B41/00—Drop keels, e.g. centre boards or side boards ; Collapsible keels, or the like, e.g. telescopically; Longitudinally split hinged keels
    • B63B2041/003—Collapsible keels, or the like, e.g. telescopically; Longitudinally split hinged keels
    • B63B2041/006—Telescopically collapsible keels

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Magnetic Bearings And Hydrostatic Bearings (AREA)

Abstract

Anti-drift surface (3) which is mobile or fixed and retractable or variable in surface area such as a centre-board, a rudder, a fin, an aileron, characterised in that the root of the profile (3) mounted in a non-sealed manner in the hull is fed with pressure via a duct (7) of sufficient cross-section arranged in a recessed manner in the internal walls of the orifice, of the well or of the parallel sleeve and as close as possible to the surface of the shell or of the hull, and in that this duct (7) is fed with water pressure via a scoop (1) or orifice situated in front of the profile in question in order to feed the escape flow (12) created by the low pressure of the suction side, escape situated between the lips (8) and the profile (3) thus treated, all this in order not to break the flow of the fluid around this profile in operation.

Description

La présente invention permet d'annuler les problèmes de cavitation ou de ventilation auquels sont soumis tous plans porteurs et tous plans antidériveséquipant une coque d'engin nautique tel que un aileron, une dérive, un gouvernail,un safran une gouverne de direction ou une aile dans l'eau monte%e façon escamotable, glissant dans un foureau ou un puits ajusté au profil considéré ou non étanche avec la carène.The present invention makes it possible to cancel the cavitation or ventilation problems to which all load-bearing planes and all anti-drift plans are subjected, equipping a nautical craft hull such as a fin, a fin, a rudder, a rudder, a rudder or a wing in the water rises% e retractably, sliding in a furnace or a well adjusted to the profile considered or not waterproof with the hull.

La présente invention consiste à réaliser un canal pressurisé ceinturant l'emplanture du profil à ras la carène permettant de faire barrage au passage de l'air sur l'extrados.En effet la dépression d'extrados crèe unesuccion de la phase aèrée ou non étanche vers la phase immergée d'ou décrochement et perte de portance du prof il considéré.The present invention consists in producing a pressurized channel encircling the root of the profile flush with the hull making it possible to block the passage of air on the upper surface. Indeed the depression of the upper surfaces creates a suction of the airy or non-waterproof phase. towards the submerged phase of or dropout and loss of lift of the prof he considered.

Le dessin annexé, donné à titre d'exemple, permettra de mieux comprendre l'invention, les caractèristiques qu'elle présente et les avantages qu'elle est vLs=eptible de procurer.The appended drawing, given by way of example, will allow a better understanding of the invention, the characteristics which it presents and the advantages which it is vLs = capable of providing.

FIGURE 1 est une vue en coupe partielle dtun plan antidérive
(3) débouchant d' un puit de dérive (4) équipé du dispo
sitif anticavitation.FIGURE 1 is a partial sectional view of an anti-drift plan
(3) emerging from a drift well (4) equipped with the available
anti-cavitation.

FIGURE 2 est une vue de cessus an- en cz-ence le profil
de la drive t3) A des pressions de part et d'autre.FIGURE 2 is a view of cessation in the profile
from drive t3) At pressures on both sides.

FIGURE 3 est une vue en coupe du dispositif équipé d'une
prise de pression à fleur de la carène
FIGURE 4 est une vue en coupe du dispositif doté d'une écope
FIGURE 5 est une vue en coupe partielle du dispositif étanché
par des lèvres souples.FIGURE 3 is a sectional view of the device equipped with a
pressure measurement flush with the hull
FIGURE 4 is a sectional view of the device provided with a scoop
FIGURE 5 is a partial sectional view of the sealed device
by flexible lips.

Figure 6 est une vue mettant en évidence l'implantation du dispo
sitif sur un emboitement ,l'emplanture du profil étant
solidaire d'une partie amovible de la carène.Figure 6 is a view highlighting the layout of the dispo
sitive on an interlocking, the root of the profile being
secured to a removable part of the hull.

Selon la figure 1 un plan antidérive (3) coulissant dans un
puits (4) est ceinturé à la base par un canal (7) paralsle
à la surface de la carène (5). Ce canal(7) est ajusté au profil (3) afin de limiter au maximum les fuites (12).According to Figure 1 an anti-drift plan (3) sliding in a
well (4) is surrounded at the base by a paralsle channel (7)
on the surface of the hull (5). This channel (7) is adjusted to the profile (3) in order to limit leaks (12) as much as possible.

Une prise de pression (1) ouverte, dans la carène ,dans l'axe et devant le--profil(3) ainsi traité alimente le canal (7)
en pression d'écoulement du fluide de façon à ne pas désa
morcer la demande en dépressurisation de l'extrados (PE). An open pressure tap (1) in the hull, in the axis and in front of the - profile (3) thus treated feeds the channel (7)
in fluid flow pressure so as not to
split the demand for pressure relief of the upper surface (PE).

Laprise de pression fonctionne comme une écope qui capte la pression dynamique plus la pression statique.L'ouverture est proéminante et dépasse de la carène , à la façon d'un point d'arret cas de la figure (4).La prise de pression, figure (3) peut etre à fleur de la carène et ne capte ainsi que la pression statique.L'ouverture de la prise de pression devra etre dimensionnée suivant ces caractèristiques et fonction de l'étanchéité entre ie profil et les lèvres d'étanchéité du profil.La figure (2) représente une vue de dessous mettant en évidence le profil de la dérive ou de l'aileron ou de gouvernail(3) ceinturé à son emplanture par les levres du boitier (2) dans lequel est installé ce canal (7) alimenté par la prise dépression (1) ouverte etorientée dans l'axe d'écoulement du fluide.L'angle ( ) correspond à l'angle de dérive de fonctionnement de l'engin nautique générant avec la vitesse, la pression en extrados (Pe) et la pression d' intrados (Pi).La pression (Pe) étant infèrieure à la pression atmosphèrique met en dépression le puits de dérive par lequel on aspire de l'air qui descend le long du profil (3) en extrados ce qui le fait décroche d'ou perte de portance.L'instaNation de ce canal(7) permet donc de remplacer cet appel d'air par de lteaupce qui annule ce phénomène de ventilation à condition que l'alimentation en eau soit suffisante.The pressure outlet functions as a scoop which captures the dynamic pressure plus the static pressure. The opening is prominent and protrudes from the hull, in the manner of a stop point in the case shown in figure (4). , figure (3) can be flush with the hull and thus only captures the static pressure. The opening of the pressure tap must be sized according to these characteristics and according to the seal between the profile and the sealing lips Figure (2) shows a bottom view highlighting the profile of the fin or fin or rudder (3) encircled at its root by the lips of the box (2) in which this channel is installed (7) supplied by the vacuum outlet (1) open and oriented in the fluid flow axis. The angle () corresponds to the operating drift angle of the nautical craft generating with the speed, the pressure in upper surface (Pe) and lower surface pressure (Pi). Zion (Pe) being lower than the atmospheric pressure puts in depression the drift well by which one sucks air which descends along the profile (3) in extrados what makes it unhooks or loss of lift. INSTALLATION OF THIS CHANNEL (7) therefore allows this air intake to be replaced by lteaupce which cancels this ventilation phenomenon provided that the water supply is sufficient.

La figure (5) nous illustre l'ajustage des lèvres (8) en matière souple synthétique par exemple rapportée, collées ou vissées, sur le boitier (2) de manière à fermer le canal (7) toujours alimenté par une prise de pression (l).La figure (6) est une application de l'invention sur une partie de la carène escamotable liée à l'emplanture d'un profil directionnel ou fixe soumis aux memes lois de fonctionnement.Figure (5) illustrates the adjustment of the lips (8) made of synthetic flexible material, for example attached, glued or screwed, on the housing (2) so as to close the channel (7) still supplied by a pressure tap ( Figure (6) is an application of the invention on a part of the retractable hull linked to the root of a directional or fixed profile subject to the same operating laws.

L'invention autorise donc le montage d'un plan antidérive non étanche dans une coque, dans un puits ou dans un fourreau de façon à le rendre escamotable oumodulable en surface sans problème de décrochement du profil(3) que celui-ci soit directionnel ou fixe dans l'axe d'avancée de l'engin nautique
Tous les matèriaux conventionnels conviennent à la réalisatic du boitier et à son insertion dans la coque de l'engin nautiu ainsi traité.The invention therefore allows the mounting of a non-waterproof anti-drift plane in a shell, in a well or in a sheath so as to make it retractable or modular on the surface without problem of detachment of the profile (3) whether it is directional or fixed in the advancing axis of the nautical craft
All conventional materials are suitable for the practicality of the case and its insertion into the hull of the nautiu machine thus treated.

I1 doit d'ailleursêtre entendu que la description qui précède n'à été donnée qu'à titre d'exemple et quelle ne limite nulle ment le domaine de l'invention dont on ne sortirait pas en remplaçant des détails d'exécution décrits par tous autres équivalents. En particulier toute autre forme de réalisation permettant l'ajustement du boitier et de ces lèvres autour du plan antidérive, peut hêtre envisagée sans sortir du cadre de l'invention à condition qu'elle présente la meme fonction
Pour les cas de réalisation les plus courants, le canal(7) est réalisé en creux dans les parois internes de l'orifice, du puits ou du fourreau, le plus près possible de la surface de la coque, réalisé sous la forme d'un boitier moulé en deux parties symétriques rapportées sur la coque. It should moreover be understood that the foregoing description has only been given by way of example and which in no way limits the field of the invention from which one would not depart by replacing the execution details described by all other equivalents. In particular any other embodiment allowing the adjustment of the housing and of these lips around the anti-drift plane, can be envisaged without departing from the scope of the invention provided that it has the same function
For the most common cases, the channel (7) is hollowed out in the internal walls of the orifice, well or sheath, as close as possible to the surface of the shell, produced in the form of a case molded in two symmetrical parts attached to the hull.

Claims (3)

REVENDICATIONS:CLAIMS: 1. Plan antidérive(3) mobile ou fixe, escamotable ou modulable en surface tel que une dérive,un gouvernail, un safran,un aileron,caractèrisé en ce que l'emplanture du profil(3) mcntéede façon non étanche dans la coque est alimentéeen pres sion par un canal (7) de section suffisante, aménagée en creux dans les parois internes de l'orifice, du puits ou du fourreau parallèle et le plus près possible de la surface de la coque ou de la carène ,et en ce que ce canal(7) est alimenté en pression d'eau par une écope(l) ou orifice situé devant le profil considéré afin d'alimenter le débit de fuite(12) créé par la dépression de l'extrados ,fuite située entre les lèves (8) et le profil (3) ainsi traités tout ceci afin de ne pas décrocher l'écoulement du fluide autour de ce profil en fonctionnement. 1. Mobile or fixed anti-drift plane (3), retractable or modular on the surface such as a fin, rudder, rudder, aileron, characterized in that the root of the profile (3) mcntéede in a leaktight manner in the hull supplied under pressure by a channel (7) of sufficient section, hollowed out in the internal walls of the orifice, the well or the parallel sheath and as close as possible to the surface of the hull or the hull, and in this that this channel (7) is supplied with water pressure by a scoop (l) or orifice located in front of the profile considered in order to supply the leakage flow (12) created by the depression of the upper surface, leak located between the lifts (8) and the profile (3) thus treated all this so as not to unhitch the flow of the fluid around this profile in operation. 2.Plan antidérive (3) suivant la revendication(l) caractèrisé en ce que son emplanture est solidaire d'une partie de la carène ou de la coque qui est amovible par emboitement dans un puits (4) de meme section équipé d'un orifice de pressllrisation qui donne sur un canal(7) ou rainure de section suffisante ayant la meme fonction,2.Antide plan (3) according to claim (l) characterized in that its root is secured to a part of the hull or the hull which is removable by fitting into a well (4) of the same section equipped with a pressurization orifice which gives onto a channel (7) or groove of sufficient section having the same function, 3.Plan antidérive (3) suivant la revendication (1) caractèrisé en ce que les lèvres (8)fermant le canal (7) sont en matière souple ou synthétique vissée ou collée. 3. Anti-drift plan (3) according to claim (1) characterized in that the lips (8) closing the channel (7) are made of flexible or synthetic material screwed or glued.
FR9006754A 1990-05-25 1990-05-25 Anti-cavitation of a retractable anti-drift surface Withdrawn FR2662418A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9006754A FR2662418A1 (en) 1990-05-25 1990-05-25 Anti-cavitation of a retractable anti-drift surface

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9006754A FR2662418A1 (en) 1990-05-25 1990-05-25 Anti-cavitation of a retractable anti-drift surface

Publications (1)

Publication Number Publication Date
FR2662418A1 true FR2662418A1 (en) 1991-11-29

Family

ID=9397117

Family Applications (1)

Application Number Title Priority Date Filing Date
FR9006754A Withdrawn FR2662418A1 (en) 1990-05-25 1990-05-25 Anti-cavitation of a retractable anti-drift surface

Country Status (1)

Country Link
FR (1) FR2662418A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102689686A (en) * 2012-06-05 2012-09-26 哈尔滨工程大学 Rudder for bionic coupling ship

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE888703A (en) * 1981-05-07 1981-11-09 Herstal Sa STABILIZER FOR SAILBOARDS AND THE LIKE
DE3043496A1 (en) * 1980-11-18 1982-06-03 Aquata Gesellschaft für Wassersport und Meerestechnik mbH &Co, 1000 Berlin Sail-board dagger board box with friction-held board - has sloping surface at after end so that pushing board backwards causes ejection
US4759552A (en) * 1987-10-09 1988-07-26 Schuetz Udo Lip gasket of a synthetic resin, especially for the daggerboard well of a sailboard
DE8810058U1 (en) * 1988-08-06 1988-10-13 North Sails Windsurfing GmbH, 8122 Penzberg Device for directional stabilization of a fast watercraft
FR2614867A1 (en) * 1987-05-06 1988-11-10 Luneteau Jacky Keel well devices of floating craft or of a sailboard provided with movable keels

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3043496A1 (en) * 1980-11-18 1982-06-03 Aquata Gesellschaft für Wassersport und Meerestechnik mbH &Co, 1000 Berlin Sail-board dagger board box with friction-held board - has sloping surface at after end so that pushing board backwards causes ejection
BE888703A (en) * 1981-05-07 1981-11-09 Herstal Sa STABILIZER FOR SAILBOARDS AND THE LIKE
FR2614867A1 (en) * 1987-05-06 1988-11-10 Luneteau Jacky Keel well devices of floating craft or of a sailboard provided with movable keels
US4759552A (en) * 1987-10-09 1988-07-26 Schuetz Udo Lip gasket of a synthetic resin, especially for the daggerboard well of a sailboard
DE8810058U1 (en) * 1988-08-06 1988-10-13 North Sails Windsurfing GmbH, 8122 Penzberg Device for directional stabilization of a fast watercraft

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102689686A (en) * 2012-06-05 2012-09-26 哈尔滨工程大学 Rudder for bionic coupling ship
CN102689686B (en) * 2012-06-05 2015-06-17 哈尔滨工程大学 Rudder for bionic coupling ship

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