EP2509856B1 - Device for raising a rudder stock on a ship - Google Patents

Device for raising a rudder stock on a ship Download PDF

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Publication number
EP2509856B1
EP2509856B1 EP10794935.6A EP10794935A EP2509856B1 EP 2509856 B1 EP2509856 B1 EP 2509856B1 EP 10794935 A EP10794935 A EP 10794935A EP 2509856 B1 EP2509856 B1 EP 2509856B1
Authority
EP
European Patent Office
Prior art keywords
rudder
hydraulic
rudder stock
top cover
ship
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.)
Not-in-force
Application number
EP10794935.6A
Other languages
German (de)
French (fr)
Other versions
EP2509856A2 (en
Inventor
Sveinung Polden
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.)
Kongsberg Maritime AS
Original Assignee
Rolls Royce Marine AS
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 Rolls Royce Marine AS filed Critical Rolls Royce Marine AS
Publication of EP2509856A2 publication Critical patent/EP2509856A2/en
Application granted granted Critical
Publication of EP2509856B1 publication Critical patent/EP2509856B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H25/00—Steering; Slowing-down otherwise than by use of propulsive elements; Dynamic anchoring, i.e. positioning vessels by means of main or auxiliary propulsive elements
    • B63H25/06—Steering by rudders
    • B63H25/08—Steering gear
    • B63H25/14—Steering gear power assisted; power driven, i.e. using steering engine
    • B63H25/26—Steering engines
    • B63H25/28—Steering engines of fluid type
    • B63H25/30—Steering engines of fluid type hydraulic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H25/00—Steering; Slowing-down otherwise than by use of propulsive elements; Dynamic anchoring, i.e. positioning vessels by means of main or auxiliary propulsive elements
    • B63H25/52—Parts for steering not otherwise provided for

Definitions

  • the present invention regards a device, and a method for raising a rudder stock on a ship, as an integrated part of the ships steering engine with the purpose of performing maintenance on the internal wearing parts of the steering engine.
  • a representative steering engine contains the entire upper radial bearing of the rudder system and rudder radial bearing.
  • a rudder stock on a ship is normally fasted radially at 2, 3 or 4 points and axially at one point, of which the steering engine can be the axial bearing point - also called rudder axial bearing.
  • the steering engine can be the axial bearing point - also called rudder axial bearing.
  • Method 1 in which the rudder and the rudder stock are secured by chains or cables that normally are fastened to the rudder blade itself: and Method 2, in which the rudder stock is secured by use of equipment mountable directly around the rudder stock during installation of the steering engine at the building yard. Furthermore, there a need in the field to relieve the rudder stock so that it can be replaced.
  • NO 302695 B1 that comprises a locking device that may be activated to maintain a rudder stock axially and radially relative to the structure of the ship in connection with replacement or maintenance of a steering engine of a ship.
  • EP 1 437 296 A further prior art example is EP 1 437 296 .
  • Method 1 requires resource-demanding operations, both cost-wise, time-wise and personnel wise. Furthermore, it is assumed that the ship is situated in port or is located in calm waters.
  • Method 2 can be split in two different variants 2a and 2b.
  • Method 2a is a solution wherein a locking device is mounted on the deck of the ship.
  • Method 2b is a solution wherein a locking device is mounted on the underside of the steering engine.
  • Method 2 solves many of the disadvantages of method 1. However, method 2 is able to lock only radially and axially. It is not possible to raise the rudder stock so that the rudder axial bearing is relieved and thereby replaceable.
  • the object of the present invention is therefore to find a device that ease the work of raising of the rudder stock, rudder and rotor from the rudder axial bearing itself so that the wearable parts can be replaced in an easier way compared to current methods.
  • This object is achieved by a top cover according to claim 1.
  • figure 1 shows a schematic sketch of a rotary-vane steering engine according to the invention, cross-sectioned and in side view;
  • figure 2 is a section of details A in figure 1 , and
  • fig 3 is a section of details B in fig 1 .
  • the device shown in fig 1 is symmetrical around the centre of the rotor. Exceptions are detail A and detail B. Consequently, equal parts arc numbered on one of the sides only.
  • an arrangement 1 is shown on an upper part of a rudder stock 2, of which the upper part is equipped with a steering engine attached to the hull 3 of the ship.
  • the steering engine comprises a rotor housing 4, a rotor 5 connected to the rudder stock, a top cover 6, a bottom cover 7, a hydraulic nut 8 with removably mounted retaining ring 9, and a hydraulic cylinder 10.
  • the hydraulic cylinder 10 is attached to the top cover 6 using a fastening- / adjusting device 11. Furthermore, the hydraulic cylinder 10 is equipped with a hydraulic piston 12 receiving a hydraulic pressure on one side through a supply channel 13 connected to a manual pump or a hydraulic system / power source (not shown).
  • the at least one upper radial bearing of the rudder stock 2 is located in the steering engine and is here represented by a radial bearing 14 in the top cover and a radial bearing 15 in the bottom cover.
  • a rudder axial bearing 16 is located in the bottom cover 7.
  • the hydraulic nut 8 is mounted on top of the rudder stock 2 and is locked so that there are no relative motions between the nut 8, rotor 4 and rudder stock 2. During normal operation of the rudder there are a small clearance between the retaining ring 9 on the hydraulic nut and the hydraulic cylinder 10. In order to lift the rudder stock 2 it is necessary to lift the hydraulic cylinder, and the fastener- /adjusting devices 11 are loosened to allow for this.
  • the hydraulic cylinder 10 By applying pressure on the hydraulic piston 12 through the supply channel 13 the hydraulic cylinder 10 must be raised and collided with the retaining ring 9 on the hydraulic nut 8. The hydraulic cylinder would then raise rotor 4, rudder and rudder stock 2 to the desired position, about 0,5-1,0 mm. The reactive power from rotor, rudder stuck and rudder is then transferred from the bottom cover 7 to the rotor housing 4 and further to the hull of the ship. The vertical position is maintained by maintaining the pressure in the supply channel 13 until bottom cover 7 is detached from the rotor housing. Afterward the pressure in the supply channel 13 is reduced, after which the cylinder will be brought down to the top of the top cover 6.
  • the supply channel 13 is pressurised so that the rudder stock 2 is raised and the bottom cover 7 can be remounted in place.
  • the hydraulic cylinder 10 will once again be brought down on top of the top cover 6, and the weight of the rotor, rudder stock and rudder will again be brought down on the rudder axial bearing.
  • the operation is ended by tightening up the fastening- / adjusting devices so that the hydraulic cylinder 10 is fastened to the cover.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Actuator (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Steering-Linkage Mechanisms And Four-Wheel Steering (AREA)
  • Mounting Of Bearings Or Others (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Sliding-Contact Bearings (AREA)
  • Ship Loading And Unloading (AREA)

Description

    Description
  • The present invention regards a device, and a method for raising a rudder stock on a ship, as an integrated part of the ships steering engine with the purpose of performing maintenance on the internal wearing parts of the steering engine.
    • Background of the invention and prior art
  • The purpose of the invention is to do necessary maintenance work on steering engines, more specifically "rotary vane"- steering engine (hereinafter referred to as steering engine), which are considerably easier then current practise. A representative steering engine contains the entire upper radial bearing of the rudder system and rudder radial bearing. A rudder stock on a ship is normally fasted radially at 2, 3 or 4 points and axially at one point, of which the steering engine can be the axial bearing point - also called rudder axial bearing. During maintenance of / or faults on the steering engine it must be feasible to lock the rudder stock both radially and axially, there are available two alternative methods for locking the rudder stock. Method 1, in which the rudder and the rudder stock are secured by chains or cables that normally are fastened to the rudder blade itself: and Method 2, in which the rudder stock is secured by use of equipment mountable directly around the rudder stock during installation of the steering engine at the building yard. Furthermore, there a need in the field to relieve the rudder stock so that it can be replaced.
  • Of prior art in the field an example is disclosed in NO 302695 B1 that comprises a locking device that may be activated to maintain a rudder stock axially and radially relative to the structure of the ship in connection with replacement or maintenance of a steering engine of a ship.
  • Other prior arts in the field are GB 1409245 A and JP 58008496 A that discloses other rudder systems compared to the present invention.
  • A further prior art example is EP 1 437 296 .
  • The disadvantages with the prior art is that there are no easy solutions to raise the rudder stock for relieving the rudder axial bearing in a steering engine so that it may easily be replaced.
  • Method 1 requires resource-demanding operations, both cost-wise, time-wise and personnel wise. Furthermore, it is assumed that the ship is situated in port or is located in calm waters.
  • Method 2 can be split in two different variants 2a and 2b. Method 2a is a solution wherein a locking device is mounted on the deck of the ship. Method 2b is a solution wherein a locking device is mounted on the underside of the steering engine. Method 2 solves many of the disadvantages of method 1. However, method 2 is able to lock only radially and axially. It is not possible to raise the rudder stock so that the rudder axial bearing is relieved and thereby replaceable.
  • In order to raise rotor, rudder and rudder stock so that the rudder axial bearing and other wearable parts is relieved/unloaded and may be replaced supplementary equipment and extra anchor points for these are required, that again is resource-demanding, time-wise as well as cost-wise.
  • The object of the present invention is therefore to find a device that ease the work of raising of the rudder stock, rudder and rotor from the rudder axial bearing itself so that the wearable parts can be replaced in an easier way compared to current methods. This object is achieved by a top cover according to claim 1.
  • The present invention will further be described in detail in connection with some embodiments and with reference to drawings, wherein figure 1 shows a schematic sketch of a rotary-vane steering engine according to the invention, cross-sectioned and in side view; figure 2 is a section of details A in figure 1, and fig 3 is a section of details B in fig 1.
    • Detailed description
  • The device shown in fig 1 is symmetrical around the centre of the rotor. Exceptions are detail A and detail B. Consequently, equal parts arc numbered on one of the sides only.
  • In figs 1 to 3 an arrangement 1 is shown on an upper part of a rudder stock 2, of which the upper part is equipped with a steering engine attached to the hull 3 of the ship. The steering engine comprises a rotor housing 4, a rotor 5 connected to the rudder stock, a top cover 6, a bottom cover 7, a hydraulic nut 8 with removably mounted retaining ring 9, and a hydraulic cylinder 10.
  • The hydraulic cylinder 10 is attached to the top cover 6 using a fastening- / adjusting device 11. Furthermore, the hydraulic cylinder 10 is equipped with a hydraulic piston 12 receiving a hydraulic pressure on one side through a supply channel 13 connected to a manual pump or a hydraulic system / power source (not shown).
  • The at least one upper radial bearing of the rudder stock 2 is located in the steering engine and is here represented by a radial bearing 14 in the top cover and a radial bearing 15 in the bottom cover. In this embodiment a rudder axial bearing 16 is located in the bottom cover 7.
  • During normal operation of the steering engine all the weight of the rudder and the rudder stock is resting on the rudder axial bearing 16 since there is not much free space between the retaining ring 9 and the hydraulic cylinder 10. To be able to change the rudder axial bearing 16, radial bearing 15 or other wearing parts in the bottom cover it is necessary to raise the rudder stock so that the force on the bottom cover is removed. If not it will be difficult to loosen the securing screws holding the bottom cover 7 and the rotor housing 4 together due to the large force that the rotor, rudder stock and the rudder exerts.
  • To relieve the rudder axial bearing 16 the rudderstock and the rudder must be sufficiently lifted so that the force exerted on the rudder axial bearing is removed. Relevant lifting height of the rudder and rudder axial bearing is in this context only a few tenths of a millimetre since the bottom cover 7 and rudder axial bearing 16 will be moved down and away from the contact surface of the rudder stock 2.
  • The hydraulic nut 8 is mounted on top of the rudder stock 2 and is locked so that there are no relative motions between the nut 8, rotor 4 and rudder stock 2. During normal operation of the rudder there are a small clearance between the retaining ring 9 on the hydraulic nut and the hydraulic cylinder 10. In order to lift the rudder stock 2 it is necessary to lift the hydraulic cylinder, and the fastener- /adjusting devices 11 are loosened to allow for this.
  • By applying pressure on the hydraulic piston 12 through the supply channel 13 the hydraulic cylinder 10 must be raised and collided with the retaining ring 9 on the hydraulic nut 8. The hydraulic cylinder would then raise rotor 4, rudder and rudder stock 2 to the desired position, about 0,5-1,0 mm. The reactive power from rotor, rudder stuck and rudder is then transferred from the bottom cover 7 to the rotor housing 4 and further to the hull of the ship. The vertical position is maintained by maintaining the pressure in the supply channel 13 until bottom cover 7 is detached from the rotor housing. Afterward the pressure in the supply channel 13 is reduced, after which the cylinder will be brought down to the top of the top cover 6.
  • Subsequent to carrying out necessary repairs the supply channel 13 is pressurised so that the rudder stock 2 is raised and the bottom cover 7 can be remounted in place. When the pressure finally is released from the supply channel 13 the hydraulic cylinder 10 will once again be brought down on top of the top cover 6, and the weight of the rotor, rudder stock and rudder will again be brought down on the rudder axial bearing. The operation is ended by tightening up the fastening- / adjusting devices so that the hydraulic cylinder 10 is fastened to the cover.

Claims (4)

  1. Top cover for a steering engine to raise a rudder stock on a ship to relieve a rudder axial bearing, the steering engine being fastened to the rudder stock (2) using a hydraulic nut (8) and further being connected to a structure of the ship (3), characterized in that the top cover (6) has an hydraulic cylinder (10) attached to it, the hydraulic cylinder being arranged to raise and engage the hydraulic nut (8), thus raising the rudder stock (2), wherein the hydraulic cylinder further comprises
    - a hydraulic piston (12),
    - at least one supply channel (13) for hydraulic oil, and
    - at least one fastening/adjusting device (11).
  2. Top cover according to claim 1, characterized in that the hydraulic nut (8) is equipped with a retaining ring (9) on which the hydraulic cylinder (10) can be abutted.
  3. Top cover according to claim 2, characterized in that the retaining ring (9) is divided so that it is detachable and easy to remove from the hydraulic nut (8).
  4. Method for using a top cover according to claims 1-3 for raising a rudder stock (2) on a ship so that the rudder axial bearing (16) is relieved, and wherein the rudder stock (2) is equipped with a steering engine fastened to the rudder stock using a hydraulic nut (8) and further connected to with the structure of the ship (3), characterized in that
    (a) loosening the at least one fastening-/adjusting device (11),
    (b) connecting /supplying oil to the supply channel (13),
    (c) increasing the pressure so that the hydraulic piston (12) abuts the top cover (6) and continuing until the hydraulic cylinder (10) abuts the retaining ring (9) and raises rotor (5), rudder stock (2) and rudder by around 0.5-1.0 mm,
    (d) loosening the bottom cover (7),
    (e) reducing the pressure in the supply channel (13) until the hydraulic cylinder (10) again abuts the top cover (7) so that the entire rudder arrangement rest on the top cover (6) via the retaining ring (9),
    (f) executing necessary maintenance of wearing parts in the bottom cover (7),
    (g) repeating point (c),
    (h) fastening the bottom cover (7).
EP10794935.6A 2009-12-09 2010-12-07 Device for raising a rudder stock on a ship Not-in-force EP2509856B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO20093499A NO330414B1 (en) 2009-12-09 2009-12-09 Lofting of rudder trunk on ships
PCT/EP2010/069085 WO2011070021A2 (en) 2009-12-09 2010-12-07 Raising a rudder stock on a ship

Publications (2)

Publication Number Publication Date
EP2509856A2 EP2509856A2 (en) 2012-10-17
EP2509856B1 true EP2509856B1 (en) 2016-05-18

Family

ID=43708284

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10794935.6A Not-in-force EP2509856B1 (en) 2009-12-09 2010-12-07 Device for raising a rudder stock on a ship

Country Status (9)

Country Link
EP (1) EP2509856B1 (en)
JP (1) JP5588518B2 (en)
KR (1) KR101431931B1 (en)
CN (1) CN102762449B (en)
BR (1) BR112012013828A2 (en)
CA (1) CA2782991C (en)
EA (1) EA021789B1 (en)
NO (1) NO330414B1 (en)
WO (1) WO2011070021A2 (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102951283B (en) * 2011-08-29 2015-04-22 中国科学院沈阳自动化研究所 Connecting rod type hydraulic steering engine
KR101616858B1 (en) * 2014-07-23 2016-04-29 삼성중공업 주식회사 Rudder carrier assembly
KR20170030895A (en) 2015-09-10 2017-03-20 훌루테크 주식회사 Steering apparatus with movable driving member
KR101749255B1 (en) 2015-09-10 2017-07-03 훌루테크 주식회사 Steering apparatus with safety device by the same
KR101749333B1 (en) 2015-09-10 2017-07-03 훌루테크 주식회사 Control method for load sensing driving unit of steering apparatus
KR101784751B1 (en) 2015-09-10 2017-10-12 훌루테크 주식회사 Finding method for locked steering apparatus and navigation method by the same and unlocking process for the locked steering apparatus by the same
CN105370889B (en) * 2015-12-21 2017-05-03 中国船舶重工集团公司第七一〇研究所 Supporting and watertight mechanism of high-torque electric steering engine output shaft
CN109204764B (en) * 2018-08-16 2020-07-31 东台友铭船舶配件有限公司 Marine rudder bearing and rudder stock connecting structure based on wear-eliminating ring body
CN109572976B (en) * 2019-01-04 2024-05-10 重庆电子工程职业学院 Internally driven ship steering engine
KR102145940B1 (en) 2019-04-11 2020-08-19 훌루테크 주식회사 Electro mechanical steering gear
CN112298517B (en) * 2020-11-09 2023-12-29 无锡鸿海龙船机有限公司 Hydraulic tiller

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1409245A (en) * 1971-09-13 1975-10-08 Turnball Marine Design Co Ltd Rudder arrangements for ships
JPS5431194A (en) * 1977-08-10 1979-03-07 Mitsubishi Heavy Ind Ltd Arrangement for fitting tiller boss to steering shaft of ship
ATE5805T1 (en) * 1979-06-22 1984-01-15 Vickers Limited HYDRAULIC RUDDER CONTROL FOR SHIPS.
JPS588496A (en) * 1981-07-09 1983-01-18 Hitachi Zosen Corp Mounting method of rudder
SU1054213A1 (en) * 1982-07-14 1983-11-15 Центральное технико-конструкторское бюро Министерства речного флота РСФСР Bearing assembly for rudder stock
NO302695B1 (en) * 1993-03-26 1998-04-14 Porsgrunn Steering Gear As Device at the helm of a ship
JP3957577B2 (en) * 2001-09-11 2007-08-15 ジャパン・ハムワージ株式会社 Rotary vane type steering machine seal structure
JP4017375B2 (en) * 2001-10-23 2007-12-05 ジャパン・ハムワージ株式会社 Steering machine installation method and rotary vane type steering machine
DE102005056419B4 (en) * 2005-11-26 2008-11-27 Dallach, Gert, Dr. Ing. Hydraulic rotary device, in particular for rotating the ship's rudder
CN101481000B (en) * 2008-11-28 2013-03-13 威海中复西港船艇有限公司 Fiberglass boat neck bearing and shafting mounting technique

Also Published As

Publication number Publication date
NO20093499A1 (en) 2011-04-11
CN102762449A (en) 2012-10-31
KR101431931B1 (en) 2014-08-19
EA021789B1 (en) 2015-08-31
KR20120092151A (en) 2012-08-20
CN102762449B (en) 2015-03-18
CA2782991C (en) 2014-10-28
BR112012013828A2 (en) 2016-05-03
EP2509856A2 (en) 2012-10-17
WO2011070021A2 (en) 2011-06-16
JP2013513510A (en) 2013-04-22
WO2011070021A3 (en) 2011-12-22
EA201290465A1 (en) 2012-11-30
NO330414B1 (en) 2011-04-11
CA2782991A1 (en) 2011-06-16
JP5588518B2 (en) 2014-09-10

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