US3444836A - Apparatus for controlling rolling of watercraft - Google Patents

Apparatus for controlling rolling of watercraft Download PDF

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Publication number
US3444836A
US3444836A US698482A US3444836DA US3444836A US 3444836 A US3444836 A US 3444836A US 698482 A US698482 A US 698482A US 3444836D A US3444836D A US 3444836DA US 3444836 A US3444836 A US 3444836A
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US
United States
Prior art keywords
tubular member
keel
housing
shaft
extended
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
US698482A
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English (en)
Inventor
Willy Rieprich
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.)
Blohm and Voss GmbH
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Blohm and Voss GmbH
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 Blohm and Voss GmbH filed Critical Blohm and Voss GmbH
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    • 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
    • B63B39/06—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude to decrease vessel movements by using foils acting on ambient water

Definitions

  • the keels are tnrnable with reference to their sleeves to and from a neutral position and the drive which elfects such movements of keels is operated only when the respective sleeves assume their extended positions. Prior to moving with the sleeves to retracted positions, the keels must be moved to neutral positions.
  • the present invention relates to watercraft in general, and more particularly to improvements in the construction of apparatus for controlling or retarding rolling of watercraft. Still more particularly, the invention relates to improvements in the construction, mounting and operation of means for adjusting the position of bilge keels on watercraft.
  • Bilge keels are mounted on the bilge of the hull below the water surface. Each keel is located at one side of the hull and is movable between an extended and a retracted position. The keels are retracted into the hull when the going is smooth but are moved to extended positions when the water is rough so that the rolling of the hull must be retarded or damped. As a rule, the keels are tnrnable about their own axes to and from a neutral position and the watercraft is equipped with mechanisms which cause the keels to move to and from their neutral positions as well as with mechanisms which cause the keels to move between extended and retracted positions.
  • the bilge keels are mounted on and can rotate with reference to hollow tubular members or sleeves which are swingable about horizontal or vertical axes to move with the keels between retracted and extended positions.
  • the keels are retracted into the hull to reduce resistance when the sea is quiet.
  • Such drives are,
  • Another object of the invention is to provide an apparatus wherein the drives which effect movements of bilge keels to and from neutral positions need not be detached from the keels when the latter are moved to and from extended positions.
  • a further object of the invention is to provide simple and compact drives which can move the bilge keels between extended and retracted positions.
  • An additional object of the invention is to provide a novel system of bearings and sealing devices for the shafts of drives which effect movements of bilge keels between retracted and extended positions and to and from neutral positions.
  • a concomitant object of the invention is to provide an apparatus which automatically places the keels into neutral positions upon completion of movement from retracted to extended positions.
  • the improved apparatus comprises two identical units each of which comprises a housing provided at one side of the hull below the Water surface, a tubular member having an end portion rotatable in the housing about a substantially vertical axis, a bilge keel rotatably mounted on the tubular member and movable therewith between an extended and a retracted position in which it respectively extends laterally from and is at least partially accommodated in the housing, first drive means operatively connected with the end portion of the tubular member to move the latter between extended and retracted positions, and second drive means for rotating the keel about the axis of the tubular member to and from a neutral position in extended position of the tubular member.
  • the second drive means comprises a driven shaft rotatably mounted in the tubular member and connected for rotation with the keel, a driver shaft mounted in the hull or in the housing and coaxial with the driven shaft in extended position of the tubular member, and coupling means connecting the two shafts to change the inclination of the keel in response to rotation of the driver shaft in extended position of the tubular member.
  • the coupling means is constructed and assembled in such a way that it permits movement of the tubular member from extended position in neutral position of the keel.
  • FIG. 1 is a vertical sectional view of one unit of the improved apparatus, with the bilge keel shown in extended position;
  • FIG. 2 is a fragmentary horizontal sectional view as seen in the direction of arrows from the line A-B of FIG. 1;
  • FIG. 3 is a fragmentary vertical sectional view as seen in the direction of arrows from the line C-D in FIG. 2.
  • the apparatus of my invention comprises two units which are mirror symmetrical with reference to the central longitudinal vertical plane of the watercraft. Therefore, the drawing merely shows one of these units.
  • the illustrated unit comprises a housing or casing 16 which is installed below the water surface in one side of the hull H and has an open outer side.
  • the innermost wall of the housing 16 i.e., the lefthand wall, as viewed in FIG. 1 supports a substantially horizontal driver shaft 1 which forms part of a drive serving to change the inclination of a bilge keel 15 by turning the latter about a substantially horizontal axis to and from a neutral position shown in FIGS. 1 and 2.
  • That end portion of the driver shaft 1 which extends into the interior of the housing 16 carries a male coupling member 2 here shown as a diametral pin whose end portions extend radially beyond the periphery of the shaft 1 and carry rolling elements 3. These rolling elements are received in recesses provided therefor in a bifurcated female coupling member 6 provided on the inner end of a driven shaft 4.
  • the outer end of the driven shaft 4 is connected for rotation with the bilge keel 15 by means of splines 5 or the like.
  • the driven shaft 4 is rotatable in and the keel 15 is rotatable on a sleeve-like tubular member 9 which is turnable with reference to the housing 16 about a substantially vertical axis defined by two coaxial pivots 7, 8 forming part of or affixed to and extending into the interior of the housing.
  • the inner end portion of the tubular member 9 is bifurcated and its arms 9a, 9b are respectively rotatable on the pivots 7 and 8.
  • the aforementioned female coupling member 6 on the driven shaft 4 is accommodated in the space between the arms 9a, 9b.
  • the shaft 4 is rotatable in water-lubricated plastic bearings 10 and 11 provided therefor in the tubular member 9, and the keel 15 is rotatable on similar bearings 13, 14 provided on the tubular member.
  • the driver shaft 1 is rotatable in a water-lubricated plastic bearing 17 and in an antifriction roller bearing 18 located downstream of the bearing 17, as considered in the direction of penetration of water into the housing 16.
  • the driver shaft 1 receives torque from a transmission 2
  • the splines 5 permit some lengthwise movements of the driven shaft 4 with reference to the keel 15 or vice versa to prevent jamming of the coupling including the parts 2, 3 and 6.
  • FIG. 1 shows the keel 15 in a neutral position in which the keel is located in a substantially horizontal plane and in which the axis of the coupling pin 2 coincides with the common vertical axis of the pivots 7, 8. These pivots are respectively mounted on or are integral with the top and bottom walls of the housing 16.
  • FIGS. 2 and 3 illustrate a second drive which serves to move the tubular member 9 and bilge keel 15 between an extended position (shown in FIG. 2 by solid lines) and a retracted or concealed position (see the phantom-line position 15' of the keel 15 in FIG. 2) in which the keel is accommodated in the interior of the housing 16.
  • This second drive includes a shaft 24 which is rotatable in the top wall of the housing 16 and is parallel with the pivots 7, 8.
  • a motion transmitting connection between the shaft 24 and the upper arm 9a of the tubular member 9 comprises a first lever 21 which is rigid with the arm 9a, a sec d l e 23 wh ch s gid wit t Sha 2.
  • the means for rotating the shaft 24 back and forth through approximately degrees comprises a two-armed lever 28 which is rigid with the shaft 24 and two hydraulic double-acting cylinder and piston units 29 each of which is connected with one arm of the lever 28. These cylinder and piston units are shown in FIG. 2 by phantom lines.
  • the upper cylinder and piston unit 29 of FIG. 2 is caused to turn the lever 24 in a clockwise direction through an angle of approximately 90 degrees.
  • the shaft 24 of the drive for the tubular member 9 is rotatable in a water-lubricated plastic bearing 25 and in an antifriction roller bearing 26 which is located downstream of the bearing 25.
  • a stufiing box 27 or a like sealing device surrounds the shaft 24 downstream of the bearing 25 to prevent penetration of water into the antifriction bearing 26.
  • the drive including the parts 21-29 can be operated to move the tubular member 9 from extended to retracted position when the keel 15 is held in neutral position, i.e., when the axis of the male coupling member 2 coincides with the common axis of pivots 7, 8 for the arms 9a, 9b.
  • the keel 15 is automatically located in neutral position and the drive including the parts 16 and 20 is then free to change the inclination of the keel by rotating the latter about the tubular member 9.
  • Apparatus for controlling rolling of the hulls of watercraft comprising a housing provided at one side of the hull below the water surface, said housing including a pair of pivots aligned along a vertical axis; a tubular member having an end portion comprising a pair of arms respectively rotatably mounted on said pivots; a bilge keel rotatably mounted on said tubular member and movable therewith between an extended and a retracted position in which it respectively extends laterally from and is at least partially accommodated in said housing; first drive means operatively connected with said end portion to move said tubular member between said extended and retracted positions; and second drive means for rotating said keel about the axis of said tubular member to and from a neutral position in extended position of said tubular member, comprising a driven shaft rotatably mounted in said tubular member and connected for rotation with said keel, a driver shaft mounted in said housing and coaxial with said driven shaft in extended position of said tubular member, and coupling means connecting
  • Apparatus for controlling rolling of the hulls of watercraft comprising a housing provided at one side of the hull below the water surface; a tubular member hav: ing an end portion rotatable in said housing about a sub:
  • first drive means operatively connected with said end portion to move said tubular member between said extended and retracted positions; and second drive means for rotating said keel about the axis of said tubular member to and from a neutral position in extended position of said tubular member, comprising a driven shaft rotatably mounted in said tubular member and connected for rotation with said keel, a driver shaft mounted in said housing and coaxial with said driven shaft in extended position of said tubular member, and coupling means connecting said shafts to change the inclination of said keel in response to rotation of said driver shaft in extended position of said tubular member, said coupling means being arranged to permit movement of said tubular member from extended position in neutral position of said keel, said coupling means comprising
  • said housing comprising two pivots having a common axis coinciding with said vertical axis and said end portion of said tubular member comprises two arms each of which is rotatable on one of said pivots, said female coupling member being disposed between said arms.
  • said male coupling member is a diametral pin having end portions extending from said driver shaft and wherein said coupling means further comprises rolling elements mounted on the end portions of said pin and received in recesses provided therefor in said female coupling member.
  • said first drive means comprises a third shaft rotatably mounted in said housing, means for rotating said third shaft, and a motion transmitting connection between said third shaft and the end portion of said tubular member.
  • connection comprises a first lever rigid with said end portion, a second lever rigid with said third shaft, and a third lever articulately connected with said first and second levers.
  • said first drive means comprises a third shaft rotatably mounted in said housing and further comprising water-lubricated bearing means provided in said housing for said driver shaft and said third shaft.
  • Apparatus as defined in claim 9, further comprising antifriction bearing means provided in said housing for said driver shaft and said third shaft, said antifriction bearing means being located downstream of the respective water-lubricated bearing means.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Transmission Devices (AREA)
  • Vehicle Body Suspensions (AREA)
US698482A 1967-01-24 1968-01-17 Apparatus for controlling rolling of watercraft Expired - Lifetime US3444836A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB0090877 1967-01-24

Publications (1)

Publication Number Publication Date
US3444836A true US3444836A (en) 1969-05-20

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ID=6985528

Family Applications (1)

Application Number Title Priority Date Filing Date
US698482A Expired - Lifetime US3444836A (en) 1967-01-24 1968-01-17 Apparatus for controlling rolling of watercraft

Country Status (9)

Country Link
US (1) US3444836A (fi)
JP (1) JPS4829586B1 (fi)
DK (1) DK126580B (fi)
ES (1) ES349568A1 (fi)
FI (1) FI45735C (fi)
FR (1) FR1580845A (fi)
GB (1) GB1201211A (fi)
NO (1) NO124474B (fi)
SE (1) SE361446B (fi)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022013016A1 (en) * 2020-07-14 2022-01-20 Skf Marine Gmbh Fin bearing assembly for a fin stabilizer

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITTO20080725A1 (it) 2008-10-02 2010-04-03 Cmc S R L Sistema automatico di stabilizzazione anti-rollio per imbarcazioni
IT1401941B1 (it) * 2010-09-17 2013-08-28 Rodriquez Marine System Srl Dispositivo per imbarcazioni

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2942570A (en) * 1954-10-13 1960-06-28 Kollenberger Walter Michael Devices for damping the rolling movement of ships
US3036540A (en) * 1959-01-29 1962-05-29 Licentia Gmbh Displaceable fin for vehicles
US3066634A (en) * 1960-05-06 1962-12-04 Suberkrub Franz Anti-roll stabilizers of ships
US3167361A (en) * 1963-05-28 1965-01-26 Ralph B Snapp Rotating bearing

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2942570A (en) * 1954-10-13 1960-06-28 Kollenberger Walter Michael Devices for damping the rolling movement of ships
US3036540A (en) * 1959-01-29 1962-05-29 Licentia Gmbh Displaceable fin for vehicles
US3066634A (en) * 1960-05-06 1962-12-04 Suberkrub Franz Anti-roll stabilizers of ships
US3167361A (en) * 1963-05-28 1965-01-26 Ralph B Snapp Rotating bearing

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022013016A1 (en) * 2020-07-14 2022-01-20 Skf Marine Gmbh Fin bearing assembly for a fin stabilizer

Also Published As

Publication number Publication date
ES349568A1 (es) 1969-04-01
FI45735C (fi) 1972-09-11
SE361446B (fi) 1973-11-05
NO124474B (fi) 1972-04-24
FR1580845A (fi) 1969-09-12
JPS4829586B1 (fi) 1973-09-11
GB1201211A (en) 1970-08-05
FI45735B (fi) 1972-05-31
DK126580B (da) 1973-07-30

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