FR2698842A1 - Stem bulb for boats, which is used to protect delicate parts like rudders or screws, with protection for this stem bulb - comprises rectangular elastic material inserted in groove along bulb length with rounded external section overshooting bulb - Google Patents

Stem bulb for boats, which is used to protect delicate parts like rudders or screws, with protection for this stem bulb - comprises rectangular elastic material inserted in groove along bulb length with rounded external section overshooting bulb Download PDF

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Publication number
FR2698842A1
FR2698842A1 FR9214742A FR9214742A FR2698842A1 FR 2698842 A1 FR2698842 A1 FR 2698842A1 FR 9214742 A FR9214742 A FR 9214742A FR 9214742 A FR9214742 A FR 9214742A FR 2698842 A1 FR2698842 A1 FR 2698842A1
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France
Prior art keywords
bulb
stem
protection
elastic material
boats
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Granted
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FR9214742A
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French (fr)
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FR2698842B1 (en
Inventor
Ebersolt Michel
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GENIMAR
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GENIMAR
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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 
    • B63B1/00—Hydrodynamic or hydrostatic features of hulls or of hydrofoils
    • B63B1/02—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement
    • B63B1/04—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with single hull
    • B63B1/06—Shape of fore part
    • B63B1/063—Bulbous bows
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B59/00—Hull protection specially adapted for vessels; Cleaning devices specially adapted for vessels
    • B63B59/02—Fenders integral with waterborne vessels or specially adapted therefor, e.g. fenders forming part of the hull or incorporated in the hull; Rubbing-strakes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T70/00—Maritime or waterways transport
    • Y02T70/10—Measures concerning design or construction of watercraft hulls

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Abstract

The stem bulb (8) includes a rectangular protection (10), formed from an elastic material, which is inserted in it. The protection external rounded section (13) slightly overshoots the bulb surface. The three other sides are set in a steel section (14) forming a groove for taking the protection (10) all along its length. The protection (10) is connected to the bulb (8) by threaded tie rods (17) and nuts (18) which clamp on a plate (19). The steel section (14) forms a part of the stiffening structure of the bulb in the same way as the handrails (15) which support the edge (16). Its presence transmits and disperses shocks encountered in coming alongside. USE - Protection of stem against shocks encountered when coming alongside thus indirectly protecting the delicate parts of boats.

Description

1-DESCRIPTION
BULBE D'ETRAVE A DEFENSE
On sait que pour un navire donné, le bulbe permettant la diminution maxima de vitesse est d'autant plus long que le navire va vite.1-DESCRIPTION
DEFENDED BOWL BULB
We know that for a given ship, the bulb allowing the maximum reduction in speed is the longer the faster the ship goes.

Ainsi l'on peut être conduit à munir un navire d'un bulbe dont la protubérance dépasse le point le plus avant de la proue. Un navire ainsi conçu, présente l'inconvénient d'être difficile à manoeuvrer. En effet, lors de l'accostage d'un navire le long d'un quai, il est préférable de présenter l'avant le premier, de manière à ce que les organes fragiles que sont le gouvernail et l'hélice, restent le plus éloignés possible. Si le navire est muni d'un bulbe d'étrave, ce dernier se trouvant sous l'eau et à l'avant, est exposé aux chocs lors de la manoeuvre. Thus one can be led to provide a vessel with a bulb whose protuberance exceeds the foremost point of the bow. A ship thus designed has the drawback of being difficult to maneuver. In fact, when docking a ship along a quay, it is preferable to present the bow first, so that the fragile parts, the rudder and the propeller, remain the most distant possible. If the vessel is fitted with a bow bulb, the latter being underwater and forward, is exposed to shocks during the maneuver.

D'après l'invention, le bulbe comprend une ceinture de protection encastrée le long de la ligne où le plan tangent à la surface du bulbe est vertical. Cette ceinture est implantée de chaque cote du bulbe. La présence d'une ceinture en matière élastique, permet d'amortir les chocs éventuels, et de ce - fait de s'affranchir de la contrainte de la protubérance. According to the invention, the bulb comprises a protective belt embedded along the line where the plane tangent to the surface of the bulb is vertical. This belt is located on each side of the bulb. The presence of a belt in elastic material, makes it possible to absorb any shocks, and thereby - to overcome the constraint of the protuberance.

L'invention sera mieux comprise, et des caractéristiques secondaires, et leurs avantages apparaîtront au cours de la description de réalisation, donnée ci-apres à titre d'exemple. The invention will be better understood, and secondary characteristics, and their advantages will become apparent during the description of embodiment, given below by way of example.

Il est entendu que la description et les dessins ne sont donnés qu'à titre indicatif et non limitatif. It is understood that the description and the drawings are given for information only and are not limiting.

1l sera fait référence aux dessins annexés dans lesquels: - La figure 1A représente la vue de profil de l'étrave d'un navire traditionnel. 1l will be referred to the accompanying drawings in which: - Figure 1A shows the side view of the bow of a traditional ship.

- La Figure 1B représente la vue en plan par dessous, de ce même navire, lorsqu'il accoste un quai.- Figure 1B shows the plan view from below, of the same ship, when it docked.

- La figure 1C représente une coupe transversale de ce même navire, lorsqu'il accoste un quai - La figure 2A représente la vue de profil du même navire, mais pourvu d'un bulbe.- Figure 1C shows a cross section of the same ship, when it docked - Figure 2A shows the side view of the same ship, but provided with a bulb.

- La figure 2B représente la vue en plan, par dessous, de ce navire, lorsqu'il accoste un quai.- Figure 2B shows the plan view, from below, of this ship, when it docked.

- La figure 2C représente une coupe transversale de ce même navire lorsqu'il accoste.- Figure 2C shows a cross section of the same ship when it docked.

- La figure 3 représente le détail de la réalisation suivant l'invention. - Figure 3 shows the detail of the embodiment according to the invention.

La figure 1B représente le navire dont la vue de profil est donnée par la vue 1A, accostant un quai. Le navire (1) comporte une étrave traditionelle (2). La partie (3), de l'étrave (2), en dessous de la ligne de flottaison (4), est en retrait du point A. L'étrave touche le quai (5) au voisinage du point B, contre lequel se trouve disposée une défense (6). FIG. 1B represents the ship whose side view is given by view 1A, docking at a quay. The ship (1) has a traditional bow (2). The part (3) of the bow (2), below the waterline (4), is set back from point A. The bow touches the quay (5) near point B, against which is finds a defense arranged (6).

La figure 1C, montre la coupe transversale suivant un plan vertical passant par le point B. La défense (6), liée au quai au niveau du plan d'eau F, protège les oeuvres vives (7) du navire situées en dessous de la flottaison F. FIG. 1C shows the cross section along a vertical plane passing through point B. The fender (6), linked to the quay at the level of the water level F, protects the living works (7) of the ship located below the buoyancy F.

La figure 2A montre le même navire (1), équipé d'un bulbe (8), dont la protubérance peut dépasser le couronnement (9) de l'étrave (2). La défense (10) est implantée suivant le contour apparent du bulbe (8). C'est à dire le long d'une ligne (11) où le plan tangent T est vertical. Cette défense (10) apparaît sur la figure 2B, laquelle montre la position respective du navire (1) et du quai (5), lors d'une manoeuvre d'accostage. Le navire peut toucher le quai (5) au point B où une défense (6) protège les oeuvres vives (7), (comme précédemment). Il peut aussi toucher le quai en un point C, où il n'y a pas de defense, et ceci d'autant plus que le bulbe n'est visible ni du quai ni du navire. FIG. 2A shows the same vessel (1), equipped with a bulb (8), the protuberance of which can exceed the crowning (9) of the stem (2). The fender (10) is located along the apparent contour of the bulb (8). That is to say along a line (11) where the tangent plane T is vertical. This defense (10) appears in FIG. 2B, which shows the respective position of the ship (1) and the quay (5), during a docking maneuver. The ship can touch the quay (5) at point B where a fender (6) protects the live works (7), (as before). It can also touch the quay at a point C, where there is no defense, all the more so since the bulb is not visible either from the quay or from the ship.

La figure 2C représentant la coupe par un plan vertical V, passant par le point C, montre la disposition relative du bulbe (8)et du quai (5). Figure 2C showing the section through a vertical plane V, passing through point C, shows the relative arrangement of the bulb (8) and the platform (5).

En ce point, C les défenses (6) ne peuvent plus exercer leur fonction de protection, laquelle est remplie par la defense (10). Le plan vertical V passant par le point C coupe l'étrave (2) suivant le contour (11) au dessus de la flottaison, suivant le contour (12) au dessous. La defense (10) est encastrée le long des points où le plan tangent au contour (12) est vertical, qui se trouve être précisément le point C. Le lieu des point C est donc le contour apparent du bulbe (8) vu en plan. Ce contour correspond à la courbe (11). At this point, C the defenses (6) can no longer exercise their protective function, which is fulfilled by the defense (10). The vertical plane V passing through point C intersects the stem (2) along the outline (11) above the waterline, along the outline (12) below. The defense (10) is embedded along the points where the plane tangent to the contour (12) is vertical, which happens to be precisely point C. The place of points C is therefore the apparent contour of the bulb (8) seen in plan . This contour corresponds to the curve (11).

La défense (10) est insérée dans le bulbe (8) comme le dont la figure 3. La défense (10), de forme rectangulaire, est constituée d'un matériau élastique, qui peut être de la famille des élastomères. Le côté externe (13) dépasse légèrement la surface du bulbe (8), suivant un profil arrondi, de courbure voisine de celle du bulbe. Ainsi les particules d'eau rencontrant cet obstacle, le contournent-elles sans difficulté. The fender (10) is inserted into the bulb (8) like the one in FIG. 3. The fender (10), of rectangular shape, consists of an elastic material, which can be of the family of elastomers. The outer side (13) slightly exceeds the surface of the bulb (8), in a rounded profile, with a curvature close to that of the bulb. Water particles encountering this obstacle, bypass it without difficulty.

Les trois autres côtés sont enchassés dans un profilé (14) en acier, constituant une rainure, recevant la défense (10) sur toute sa longueur. Ce profilé constitue une partie de la structure de raidissement du bulbe, au même titre que les lisses (15) qui soutiennent le bordé (16). De par sa présence, elle transmet et disperse les chocs dus à l'accostage, dans l'ensemble de la structure, et rends ainsi le bulbe plus résistant. The other three sides are encased in a steel profile (14), constituting a groove, receiving the defense (10) over its entire length. This profile constitutes a part of the stiffening structure of the bulb, in the same way as the heddles (15) which support the plating (16). By its presence, it transmits and disperses the shocks due to docking, throughout the structure, and thus makes the bulb more resistant.

La défense (10) est liée au bulbe (8), au moyen de tirants filetés (17) et d'écrous (18), lesquels viennent serrer un plat (19), passant par l'évidement (20). Cet évidement s'étend sur toute la longueur de la défense.  The fender (10) is linked to the bulb (8), by means of threaded tie rods (17) and nuts (18), which tighten a plate (19), passing through the recess (20). This recess extends over the entire length of the tusk.

L'invention n'est pas limitée à la réalisation présentée mais en couvre au contraire toutes les variantes qui pourraient leur être apportées, sans sortir de leur cadre ni de leur esprit. The invention is not limited to the embodiment presented but on the contrary covers all the variants which could be made to them, without departing from their scope or their spirit.

L'invention s'applique aux navires.  The invention applies to ships.

Claims (4)

2 - REVENDICATIONS2 - CLAIMS 1. Bulbe d'étrave (8), de navire caractérisé en ce qu'il comporte le long de ses deux flancs une défense en matériau élastique (10), jouant le rôle de protection lors des accostages. 1. Bow bulb (8), of a ship characterized in that it has along its two sides a defense of elastic material (10), playing the role of protection during docking. 2. Bulbe d'étrave (8) du navire suivant revendication 1, caractérisé en ce que cette défense (10) est implantée suivant la ligne (11), le long de laquelle le plan tangent T, est vertical. 2. Bow bulb (8) of the ship according to claim 1, characterized in that this defense (10) is located along the line (11), along which the tangent plane T, is vertical. 3. Bulbe d'étrave (8) de navire, suivant les revendications 1 et 2, caractérisé en ce que la défense (10) est insérée dans un logement constitué d'un profilé rectangulaire (14), concourant à la tenue mécanique du bulbe (8). 3. Bulb bow (8) of a ship, according to claims 1 and 2, characterized in that the fender (10) is inserted in a housing consisting of a rectangular profile (14), contributing to the mechanical strength of the bulb (8). 4. Bulbe d'étrave (8) de navire suivant les revendications 1, 2 et 3, caractérisé en ce que la partie de la défense (10) dépassant le logement, est arrondie suivant le profil (13).  4. Bow bulb (8) of a ship according to claims 1, 2 and 3, characterized in that the part of the fender (10) beyond the housing, is rounded according to the profile (13).
FR9214742A 1992-12-08 1992-12-08 Defense bow bulb. Expired - Fee Related FR2698842B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9214742A FR2698842B1 (en) 1992-12-08 1992-12-08 Defense bow bulb.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9214742A FR2698842B1 (en) 1992-12-08 1992-12-08 Defense bow bulb.

Publications (2)

Publication Number Publication Date
FR2698842A1 true FR2698842A1 (en) 1994-06-10
FR2698842B1 FR2698842B1 (en) 1995-02-17

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Family Applications (1)

Application Number Title Priority Date Filing Date
FR9214742A Expired - Fee Related FR2698842B1 (en) 1992-12-08 1992-12-08 Defense bow bulb.

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FR (1) FR2698842B1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3937170A (en) * 1974-10-29 1976-02-10 Drewett Glen E Bumper guard and arrangement for water covered areas
SU1369985A1 (en) * 1986-04-09 1988-01-30 Николаевский Кораблестроительный Институт Им.Адм.С.О.Макарова Fender guard
FR2671776A1 (en) * 1991-01-18 1992-07-24 Ebersolt Michel Ship with active bulb [bulbous bow]

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3937170A (en) * 1974-10-29 1976-02-10 Drewett Glen E Bumper guard and arrangement for water covered areas
SU1369985A1 (en) * 1986-04-09 1988-01-30 Николаевский Кораблестроительный Институт Им.Адм.С.О.Макарова Fender guard
FR2671776A1 (en) * 1991-01-18 1992-07-24 Ebersolt Michel Ship with active bulb [bulbous bow]

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
SOVIET PATENTS ABSTRACTS Section PQ, Week 8833, 21 Juillet 1988 Derwent Publications Ltd., London, GB; Class Q, AN 88-233712 & SU-A-1 369 985 (NIKOLAEV SHIPBUILD) *

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FR2698842B1 (en) 1995-02-17

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Effective date: 20100730