US3327672A - Combination stabilization and heeling system for cargo ships. ice breakers, and the like - Google Patents

Combination stabilization and heeling system for cargo ships. ice breakers, and the like Download PDF

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Publication number
US3327672A
US3327672A US489713A US48971365A US3327672A US 3327672 A US3327672 A US 3327672A US 489713 A US489713 A US 489713A US 48971365 A US48971365 A US 48971365A US 3327672 A US3327672 A US 3327672A
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US
United States
Prior art keywords
tank
compartments
door
bulkhead
liquid
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.)
Expired - Lifetime
Application number
US489713A
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English (en)
Inventor
Sheldon B Field
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.)
John J Mcmullen Associates Inc
Original Assignee
John J Mcmullen Associates Inc
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 John J Mcmullen Associates Inc filed Critical John J Mcmullen Associates Inc
Priority to US489713A priority Critical patent/US3327672A/en
Priority to GB48212/65A priority patent/GB1063410A/en
Priority to FI2816/65A priority patent/FI43392B/fi
Priority to BE672801D priority patent/BE672801A/xx
Priority to FR39618A priority patent/FR1455613A/fr
Priority to NO160672A priority patent/NO124245B/no
Priority to DEM67463A priority patent/DE1277694B/de
Priority to ES0320174A priority patent/ES320174A1/es
Priority to NL6515599A priority patent/NL6515599A/xx
Priority to SE15575/65A priority patent/SE322433B/xx
Application granted granted Critical
Publication of US3327672A publication Critical patent/US3327672A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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 
    • B63B39/00—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude
    • B63B39/02—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude to decrease vessel movements by displacement of masses
    • B63B39/03—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude to decrease vessel movements by displacement of masses by transferring liquids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B19/00—Arrangements or adaptations of ports, doors, windows, port-holes, or other openings or covers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
    • B63B35/08—Ice-breakers or other vessels or floating structures for operation in ice-infested waters; Ice-breakers, or other vessels or floating structures having equipment specially adapted therefor
    • B63B35/10—Ice-breakers or other vessels or floating structures for operation in ice-infested waters; Ice-breakers, or other vessels or floating structures having equipment specially adapted therefor having forced pitching or rolling equipment

Definitions

  • One important feature of the present invention stems from my discovery that a greater heeling moment can be developed with one centerline door than the moment in systems using a three compartmented tank. Basically, theentire dimension of the compartment located outboard of the centerline bulkhead containing the door contributes to the heeling moment when, after the door is closed, the stabilizing medium is pumped into that compartment'. Since the moment being developed is greater than priorknown systems, the vessel will controllably change in an angular attitude at a rate faster than if the vessel were equipped with these prior known systems.
  • These bulkheads are also provided with a plurality of air openings to insure an unimpeded transfer of -air between the subcompartments of the stabilizer.
  • Yet another object of the present invention is to provide a vacuum pump in the system so that valves and the need for their operation are eliminated at the time the system is used in the heeling tank mode.
  • FIGURE 1 is a perspective view, with parts broken away, of the combination stabilizer and heeling tank.
  • h FCIGURE 2 is a side elevation of the centerline bulk- FIGURE 3 is a top line 3-3 of FIGURE 2.
  • FIGURE 4 is a fragmentary sectional view along line 44 of FIGURE 2. 1
  • FIGURE 5 is a front elevation ofan additional longitudinal bulkhead having a plurality of vertical cuts or openings therein.
  • FIGURE 6 is a fragmentary sectional view taken along line 6-6 of FIGURE 5.
  • FIGURES 7- and 8 illustrate other embodiments of movable doors which in combination with the tank comprise the present invention.
  • the passive stablization and heeling tank system generally. indicated as'10 which includes an elongated substantially rectangular tank 12 which is mounted trans versely across the hull (not shown) of a cargo ship, ice breaker, ferry or other like vessel.
  • the necessary stiffeners are welded to structural elements andv decks of the tank system and vessel.
  • Bulkhead 14 is provided with two enlarged, spaced openings which extend throughout a major distance of the height of tank 12. These-enlarged openings enable liquid transfer between thecompa'rtments for the purpose to be described below.
  • aframework 16 is welded on one side of said bulkhead 14 about the periphery of each enlarged opening.
  • Anelongated U -shaped guide channel 20, which has a portionextending either fore or aft beyond the area of its respective opening-is bolted at the top and bottom of framework 16.
  • Each pair of channels 20 slidably support an upstanding door 22 provided with rollers 24 which engage the front top surface of guides 20. See FIGURE 4.
  • Do0r' 22 also has a forward vertical lip 26 which when door 22 is closed seats snuggly section-a1 plan view taken along within a U-shaped'fre'ceiving flange 8 mounted at the forward and inward side of frame 16.
  • Door 22 is also provided with a rear lip 34 which extends 'beyond the back face of the plane thereof and cooperates wtih a rear flange 36,on the frame 16 to insure a liquid tight seal when door 22 is closed.
  • a hydraulic cylinder and piston unit 30 has its one end welded or otherwise secured 'to the sides of tank 12, and the piston is mechanically connected to door 22 by bracket 32.
  • the cylinder-piston unit 30 functions to move door 22 between its open and closed position, and therefore, said unit 30 is'mounted parallel to the direction of the movement of the door and guide channels 20.
  • This sliding door arrangement affords great advantage in that the movement of the door is in a direction parallel to the'plane of the door so that the door when operated does not work against the liquid.
  • This feature as well as the sliding support arrangement for the doors enables use of less expensive machinery to operate the doors as well as a lower power requirement for door operation. Also of importance is the fact that these sliding doors enable movement thereof between a completely open and a completely closed position in the minimum amount of time.
  • the transverse dimension of tank 12 is mathematically calculated taking into account the height and length thereof and the anticipated weight and roll characteristics of the vessel. If, for any reason, as in the case illustrated in FIGURE 1, the width of tank 12 is less than that required for the sliding door operation, a longitudinally (laterally with regard to the tank) extending small alcove 40 is provided to enable the necessary take up space for door 22.
  • One or more additional longitudinal bulkheads 42 are provided in each compartment of tank 12 and have therein a plurality of vertically extending spaced but aligned cuts 44 and a plurality of spaced semi-circular cuts 46 and 48 at the extreme top and bottom thereof respectively. These additional bulkheads 42 enable liquid transfer therethrough and serve to dissipate a part of kinetic energy therefrom. As better seen in FIGURE 6,
  • an elongated rod or wire 43 having a circular crosssection is welded to the additional bulkhead 42 and lines the periphery of each elongated vertical cut or opening therein.
  • the circular shape of wire 43 serves to enhance liquid transfer through these openings.
  • the tank 12 is also outfitted with the conventional vents 48, and drain valves and piping system 50 which serve to selectively drain tank 12 when desired.
  • a controllable vacuum pump 52 having a predetermined suitable liquid flow rate capacity communicates with both compartments of tank 12 through pipes 54 and openings 56 in the floors of said compartments.
  • Pump 54 is preferably a high speed centrifugal pump with a low level trip. With the use of reversible vacuum pump 52, there is no need to use valves either at the openings 56 or in pipe 54. Since vacuum pumps of this type are conventional and known in the art, further detailed description thereof is not considered necessary.
  • tank 12 is first filled to a predetermined level with any suitable liquid medium such as sea water, fuel, bunker oil, or the like.
  • the level of liquid is selected so that the natural frequency of oscillation thereof is equal to the natural frequency of roll, of the ship.
  • pump 52 is shut off and doors 22 are opened to their fullest extent thus exposing the entire enlarged openings in bulkhead 14 to enable the greatest liquid transfer therethrough.
  • liquid within the tank 12 transfers through the enlarged openings in bulkhead 14 and the cuts in the additional bulkhead 42.
  • the shifting mass of liquid imparts a moment to the vessel which is in opposition to the roll and, in this manner, stabilizes the vessel.
  • the hydraulic piston and cylinder unit 30 are energized to thus force doors 22 along guide rails 20.
  • doors 22 are finally seated in their closed positions, the cornpartment of tank 12 are eifectively isolated from each other.
  • pump 52 is energized and forces liquid from either one of the compartments of tank 12 to the other. As liquid is taken from one compartment and fed to the other, the pressures in the comparments are equalized by air flow through vent 48 in the normal manner.
  • the present invention can be used to set up a controlled list to match the dock level with one of the decks of the vessel. In this way, the loading and unloading time of the vessel is shortened and with the present invention the greatest heeling moment is imparted to the vessel in the shortest amount of time.
  • FIGURES 7 and 8 there is illustrated other arrangements which can be used in lieu of sliding door arrangement in the embodiment shown in FIGURE 1.
  • FIGURE 7 only one enlarged opening is provided in bulkhead 14 and mounted in the center of this bulkhead is a rotatable butterfly valve or plate with substantially the same dimensions as said opening.
  • vertical plate 60 is hinged along the centerline of the opening and is selectively driven by a hydraulic motor unit 62.
  • Plate 60 is shown in the open position in FIGURE 7, that is, perpendicular to the plane of bulkhead 14.
  • motor unit 62 rotates plate 60 to a position coplanar with said bulkhead 14.
  • FIGURE 8 there is again a single enlarged opening in bulkhead 14 and plate 64 has one edge thereof hingedly secured to bulkhead 14 along one edge of the opening.
  • a hydraulic motor unit 66 is mounted on bulkhead 14 above the opening and moves plate 64 between an open and closed position through a series of mechanical linkages 68.
  • An elongated combined passive stabilizer and heeling tank arranged across the hull of a freighter, ferry, ice breaker, or any other type of ship comprising an elongated tank extending across the hull of said ship, a body of liquid partially filling said tank to a level so that the tank liquid oscillation frequency is tuned to the roll of the ship and an air space above said body of liquid, means provided within the tank to selectively divide said tank into two isolatable compartments only, said means including a centerline bulkhead having at least one enlarged opening to permit liquid passage therethrough, a movable door movably mounted on said bulkhead for selectively, completely and partially opening and closing said opening depending upon its position relative thereto, air vent means communicating with each compartment to equalize the air pressure therein when said door is closed, and pump means communicating with the two compartments for selectively moving liquid from either one of said compartments to the other whereby when said door is open and said pump means is de-energized the system operates as a passive stabilizer andwhen the door is closed and the pump means
  • elongated guide channels are mounted above and below said opening on one side of said centerline bulkhead, said door having a top and a bottom which slidably seats in said guide channels so that the direction of movement of said door is confined to the plane of said channels, a door operating unit connected to said door for moving said door 5 between a fully opened position and a fully closed position whereby said door, when in the latter position, completely blocks liquid transfer through said opening to thus isolate one said compartment from the other.
  • said door further comprises rollers rotatably mounted thereto which ride on one surface of said guide, and wherein said door operating unit comprises a hydraulic piston and cylinder arrangement having one end'fixed with respect to the stabilizer and having the other end connected by means of a bracket to said door.
  • a system as set forth in claim 4 wherein a framework is mounted to said bulkhead about the periphery of said enlarged opening, said framework having a vertical U-shaped flange at the opposite side of said opening from said door, said door comprising an upstanding forward extending lip which, when the door is closed, seats in said flange to close said opening.
  • said plate is vertically disposed and has its center hingedly mounted to said bulkhead to define a vertical axis of rotation and is horizontally rotatable to a position perpendicular to the plane of said bulkhead when in the open position and to a position within the plane of said bulkhead when in a closed position, said plate having substantially the same dimensions as said opening.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Toys (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Vibration Prevention Devices (AREA)
US489713A 1965-09-23 1965-09-23 Combination stabilization and heeling system for cargo ships. ice breakers, and the like Expired - Lifetime US3327672A (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
US489713A US3327672A (en) 1965-09-23 1965-09-23 Combination stabilization and heeling system for cargo ships. ice breakers, and the like
GB48212/65A GB1063410A (en) 1965-09-23 1965-11-12 Combination stabilization and heeling system for cargo ships, ice breakers and the like
FI2816/65A FI43392B (he) 1965-09-23 1965-11-23
FR39618A FR1455613A (fr) 1965-09-23 1965-11-24 Dispositif combiné de stabilisation et de gîte pour navires de charge, brise-glace,et autres
BE672801D BE672801A (he) 1965-09-23 1965-11-24
NO160672A NO124245B (he) 1965-09-23 1965-11-29
DEM67463A DE1277694B (de) 1965-09-23 1965-11-30 Passive Schlingerdaempfungstankanlage fuer Schiffe, insbesondere fuer Faehren und Eisbrecher
ES0320174A ES320174A1 (es) 1965-09-23 1965-11-30 Sistema combinado de estabilizacion e inclinacion para buques.
NL6515599A NL6515599A (he) 1965-09-23 1965-12-01
SE15575/65A SE322433B (he) 1965-09-23 1965-12-01

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US489713A US3327672A (en) 1965-09-23 1965-09-23 Combination stabilization and heeling system for cargo ships. ice breakers, and the like

Publications (1)

Publication Number Publication Date
US3327672A true US3327672A (en) 1967-06-27

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ID=23944981

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US489713A Expired - Lifetime US3327672A (en) 1965-09-23 1965-09-23 Combination stabilization and heeling system for cargo ships. ice breakers, and the like

Country Status (10)

Country Link
US (1) US3327672A (he)
BE (1) BE672801A (he)
DE (1) DE1277694B (he)
ES (1) ES320174A1 (he)
FI (1) FI43392B (he)
FR (1) FR1455613A (he)
GB (1) GB1063410A (he)
NL (1) NL6515599A (he)
NO (1) NO124245B (he)
SE (1) SE322433B (he)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3965837A (en) * 1975-05-01 1976-06-29 Brown & Root, Inc. Vessel having improved wave response characteristics
US4528927A (en) * 1983-03-22 1985-07-16 Achilles Corporation Planing type boat

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2077143A (en) * 1932-01-06 1937-04-13 Firm Of Townsend & Decker Means for stabilizing ships with fuel oil
US3192888A (en) * 1963-09-19 1965-07-06 Mcmullen Ass John J Combination stabilization and heeling system for ice breakers

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB996276A (en) * 1963-05-17 1965-06-23 Muirhead & Co Ltd Improvements in or relating to ship stabilization
US3164120A (en) * 1963-06-13 1965-01-05 Mcmullen Ass John J Flume stabilization system for tankers and the like

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2077143A (en) * 1932-01-06 1937-04-13 Firm Of Townsend & Decker Means for stabilizing ships with fuel oil
US3192888A (en) * 1963-09-19 1965-07-06 Mcmullen Ass John J Combination stabilization and heeling system for ice breakers

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3965837A (en) * 1975-05-01 1976-06-29 Brown & Root, Inc. Vessel having improved wave response characteristics
US4528927A (en) * 1983-03-22 1985-07-16 Achilles Corporation Planing type boat

Also Published As

Publication number Publication date
FR1455613A (fr) 1966-10-14
NO124245B (he) 1972-03-27
FI43392B (he) 1970-11-30
BE672801A (he) 1966-05-24
GB1063410A (en) 1967-03-30
DE1277694B (de) 1968-09-12
ES320174A1 (es) 1966-09-01
NL6515599A (he) 1967-03-28
SE322433B (he) 1970-04-06

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