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US3584591A - Device for stabilizing the trim of a floating object - Google Patents

Device for stabilizing the trim of a floating object Download PDF

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Publication number
US3584591A
US3584591A US819746A US3584591DA US3584591A US 3584591 A US3584591 A US 3584591A US 819746 A US819746 A US 819746A US 3584591D A US3584591D A US 3584591DA US 3584591 A US3584591 A US 3584591A
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US
United States
Prior art keywords
pump
speed
variable delivery
delivery pump
hydraulic motor
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
US819746A
Other languages
English (en)
Inventor
Gilbert Fournier
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.)
Ateliers Et Chantiers Du Havre Duchesne & Bassiere Et Augustin Normand Reuni S
Duchesne & Bossiere
Original Assignee
Duchesne & Bossiere
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 Duchesne & Bossiere filed Critical Duchesne & Bossiere
Application granted granted Critical
Publication of US3584591A publication Critical patent/US3584591A/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
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D1/00—Control of position, course, altitude or attitude of land, water, air or space vehicles, e.g. using automatic pilots
    • G05D1/08—Control of attitude, i.e. control of roll, pitch, or yaw
    • G05D1/0875—Control of attitude, i.e. control of roll, pitch, or yaw specially adapted to water vehicles

Definitions

  • the device for stabilizing the trim of a floating object comprises a mass of liquid contained in an enclosure inside of which is guided a piston associated with a jack, an installation comprising a variable delivery pump and a forcing pump for supplying a hydraulic motor whose output shaft is coupled up beyond an inertia flywheel to the driving shaft of a variable delivery pump supplying said jack, the pump being servo-controlled by the disturbing torque undergone by the floating object.
  • SHEET 2 [IF 2 DEVICE FOR STABILIZING THE TRIM OF A FLOATING OBJECT
  • the present invention relates to a trim stabilizer that can be incorporated or added to any floating object for neutralizing in a general manner, partially or completely, angular disturbing movements caused, for instance by swell.
  • the device of the invention is conceived so as advantageously to form an antirolling or antipigching stabilizer capable of adapting the righting torque to the best advantage that it supplies as a function of the pertubating torque undergone.
  • the stabilizing device comprises a transfer assembly of a liquid mass comprising, inside a chamber or enclosure containing said mass, at least one division part guided in displacement and associated with at least one jack able to be supplied by at least one installation comprising a driving motor of a variable delivery pump and a force pump for feeding a hydraulic motor whose output shaft is coupled to at least one motor flywheel to the driving shaft of a variable delivery pump supplying the jack, and whose servodrive is controlled by a servo and detection chain of the disturbing torque undergone by the floating object.
  • FIG. 1 is a diagram showing the various constitutive members of the trim stabilizing device.
  • FIG. 2 is a partial diagrammatic perspective view showing, on a larger scale, the particular embodiment ofone ofthe constitutive members of the stabilizing device.
  • the device comprises a transfer assembly 1 shown in FIG. 2 in its application to antirolling stabilization of a ship whose hull is diagrammatized at 2.
  • the transfer assembly 1 is placed inside a transfer chamber 3 transversal to the longitudinal axis of the hull 2 to provide communication for the lower parts of two lateralenclosures 4 extending vertically.
  • the chamber 3 contains a liquid mass 5 also rising in the inoperative state partly inside lateral enclosures 4.
  • the transfer assembly 1 essentially comprises a movable member or piston or division part 6 whose section is complementary to that of the chamber 3 inside which said piston is vertically maintained by horizontal guide ways 7.
  • Each runway 7 can be made in several manners, particularly by a guide rod 8, of cylindrical section, for instance, made integral with the piston or division part 6 for sliding in one or more bearings 9.
  • the guiderods 8 can be provided in pairs on either side of the piston or division part 6. The latter is also connected to the ends of piston rods 10 and 11 of two singleacting opposed hydraulic jacks 12 and 13 whose cylinders 14 and 15 are articulately mounted on supports 16 and 17. In certain cases the jacks 12 and 13 can be replaced by a single double-acting and double-rod jack.
  • the jacks l2 and 13 are intended to be alternately supplied with hydraulic pressure fluid, so as to drive the piston or division part 6 in one direction or the other inside the chamber 3 so as to displace the center of gravity of the liquid mass 5 and create a kind of straightening antagonist torque to the disturbing torque undergone by the ship.
  • the power required for displacing the piston or division part 6 varies considerably and can even reach to very great values relatively to the mean power consumed. Also, it should be noted that it is advisable to supply a certain power to the jacks for displacing the piston or division part 6 but that in othercases the jacks must also be capable of receiving and absorbing a certain energy transmitted by the liquid mass 5 exerting a thrust on the piston or division part 6.
  • the invention provides for ensuring the hydraulic pressure fluid of the jacks 12 and 13 by means of a feeding installation 18 shown in FIG. 1.
  • the installation 18 comprises a driving motor 19 for a variable delivery hydraulic pump 20 self-regulated for pressure whose intake is branched to a tank or cistern 21.
  • the discharge of the variable delivery pump 20 is connected on to the input of a hydraulic motor 22 whose output shaft 23 is coupled up to the driving shaft 26 of an inertia flywheel 25,
  • the shaft 26 is itself coupled up to the driving shaft 28 of a variable delivery pump 29 provided for supplying in closed circuit the jacks 12 and 13 by means of a servocontrol.
  • the motor 19 is also provided for ensuring the drive of a supplemental force pump 30 whose intake is connected to a tank of cistern 3] that can obviously be the same as that supplying the variable delivery pump 20.
  • the outlet or discharge of the pump 30 is connected to the outlet of the variable delivery pump 20 and comprises, above this connection, a normally closed pressure responsive antireturn or retaining valve 32.
  • a normally open safety valve 35 enables the pump 30 to be made inoperative for speeds less than or equal to the nominal speed of the inertia flywheel 25.
  • the outlet or discharge of the hydraulic motor 22 comprises above the return to the cistern, a delivery pressure regulator 33 as well as a calibrated flow restricting opening 34 provided in derivation and intended to establish, on the one hand, a counterpressure near to a predetermined force pressure for the nominal speed of the inertia flywheel 25, and on the other hand, a counterpressure varying with the square of the rotation speed of said flywheel for speed values exceeding the nominal speed of the flywheel.
  • the rotation of the motor 19 causes the variable delivery pump 20 to turn, whose oil delivery drives the hydraulic motor 22.
  • the constant torque drive of the motor 22 ensures, the putting into rotation of the inertia flywheel 25 which progressively reaches its nominal speed in driving the pump 29 whose delivery during this phase is regulated at zero.
  • the stabilizing device is then ready to function.
  • the pump 29, whose servo drive is controlled for supplying said jack 13 and providing it with a power in relation with the correcting torque to set up is driven by the inertia flywheel 25 so that the driving motor 19 of the variable delivery pump 20 is not required to provide a power exceeding its nominal power,
  • the inertia flywheel 25 is no longer required to provide supplementary power and tends, therefore, progressively to pick up its nominal speed so that the supply installation 18 is once more in its initial working conditions.
  • flywheel 25 cannot, in any case, be driven at excess speed beyond a predetermined value, owing to the presence of the regulator 33, and calibrated opening 34 intended to set up a safety counterpressure braking the rotation of the motor 22 for rotation speeds in the vicinity of, or exceeding, the nominal speed of the inertia flywheel 25, One is thus assured,
  • the installation allows a driving motor 19 to be available of a power less than the peak power likely to be required by said installation, this excess power being supplied by the kinetic energy stored up by the inertia flywheel and restored by means of variation of the reasonable rotation speed of said flywheel.
  • the installation 18 can comprise several inertia flywheels and operate the sliding of one or more pistons or partition parts 6, or, eventually, be associated with other similar installations for controlling the displacement of a single piston or partition part.
  • the servocontrol of the distribution slide-valve for the pump 29 is controlled by a servo chain able to estimate the value of the disturbing torque applied to the ship, so as to control the value of the compensating antagonizing torque.
  • This servo chain can comprise a detector of the angle of the trim change of the ship, a detector of the angular speed of this change of trim and a detector of the second derivative of the angle of the trim change eventually associated with a corrector system which is a function of these latter, as well as a servomotor controlling, by servo rods, the servocontrol of the variable delivery pump 29.
  • Apparatus for stabilizing the trim of a floating object comprising a chamber to contain a mass of liquid displaceable to counter a torque against a floating object,
  • a hydraulic power element including a piston operatively connected to said movable member
  • a flrst variable delivery pump having an outlet in communication with said hydraulic power element
  • a second variable delivery pump in communication with and driving said hydraulic motor, said second variable speed pump driven at a nominal speed
  • an inertia flywheel operatively connectingsaid hydraulic motor to said first variable delivery pump to drive said first variable delivery pump at a speed in excess of the nominal driven speed of said second variable delivery pump.
  • Apparatus for stabilizing the trim of a floating object as defined by claim 1 the addition of a supplemental driven pump having an outlet in communication with said second variable delivery pump, and a normally closed valve responsive to a predetermined excess in the speed of said inertia flywheel to render said supplemental driven pump effective.
  • control member is a pressure responsive valve in communication with the hydraulic pressure at said hydraulic motor.
  • Apparatus as defined by claim 4 with the addition of a pressure regulator in communication with hydraulic motor, and a flow restriction in parallel with said regulator and in communication with said hydraulic motor.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Combustion & Propulsion (AREA)
  • General Physics & Mathematics (AREA)
  • Remote Sensing (AREA)
  • Automation & Control Theory (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)
  • Vibration Prevention Devices (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
  • Control Of Turbines (AREA)
US819746A 1968-10-21 1969-04-28 Device for stabilizing the trim of a floating object Expired - Lifetime US3584591A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR170710 1968-10-21

Publications (1)

Publication Number Publication Date
US3584591A true US3584591A (en) 1971-06-15

Family

ID=8655896

Family Applications (1)

Application Number Title Priority Date Filing Date
US819746A Expired - Lifetime US3584591A (en) 1968-10-21 1969-04-28 Device for stabilizing the trim of a floating object

Country Status (10)

Country Link
US (1) US3584591A (nl)
DE (1) DE1903707B1 (nl)
DK (1) DK144123C (nl)
FI (1) FI49270C (nl)
FR (1) FR1599007A (nl)
GB (1) GB1250058A (nl)
NL (1) NL145179B (nl)
NO (1) NO125667B (nl)
SE (1) SE344443B (nl)
SU (1) SU454728A3 (nl)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3931780A (en) * 1973-08-30 1976-01-13 Waas Heinrich Icebreaker vessel
CN106184644A (zh) * 2016-08-25 2016-12-07 陈节庆 一种船舶减摇装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2883253B1 (fr) 2005-03-21 2015-10-30 Gilbert Fournier Dispositif de stabilisation de navire et navire ainsi equipe

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US732920A (en) * 1902-11-07 1903-07-07 Electric Boat Co Submarine boat.
US3397664A (en) * 1966-09-16 1968-08-20 Hydronautics Vessel stabilizer

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE302527C (nl) *
US1708679A (en) * 1922-08-23 1929-04-09 Carl L Norden Ship stabilizer
FR1386405A (fr) * 1963-12-09 1965-01-22 Duchesne Et Des Ateliers Bossi Système de stabilisation des navires

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US732920A (en) * 1902-11-07 1903-07-07 Electric Boat Co Submarine boat.
US3397664A (en) * 1966-09-16 1968-08-20 Hydronautics Vessel stabilizer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3931780A (en) * 1973-08-30 1976-01-13 Waas Heinrich Icebreaker vessel
CN106184644A (zh) * 2016-08-25 2016-12-07 陈节庆 一种船舶减摇装置
CN106184644B (zh) * 2016-08-25 2017-12-19 重庆永林机械设备有限公司 一种船舶减摇装置

Also Published As

Publication number Publication date
FI49270C (fi) 1975-05-12
DK144123C (da) 1982-06-01
SE344443B (nl) 1972-04-17
GB1250058A (en) 1971-10-20
FR1599007A (nl) 1970-07-15
SU454728A3 (ru) 1974-12-25
FI49270B (nl) 1975-01-31
DE1903707B1 (de) 1971-03-11
NO125667B (nl) 1972-10-16
DK144123B (da) 1981-12-14
NL6910383A (nl) 1970-04-23
NL145179B (nl) 1975-03-17

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