WO2011070021A2 - Raising a rudder stock on a ship - Google Patents

Raising a rudder stock on a ship Download PDF

Info

Publication number
WO2011070021A2
WO2011070021A2 PCT/EP2010/069085 EP2010069085W WO2011070021A2 WO 2011070021 A2 WO2011070021 A2 WO 2011070021A2 EP 2010069085 W EP2010069085 W EP 2010069085W WO 2011070021 A2 WO2011070021 A2 WO 2011070021A2
Authority
WO
WIPO (PCT)
Prior art keywords
rudder
rudder stock
steering engine
hydraulic
ship
Prior art date
Application number
PCT/EP2010/069085
Other languages
French (fr)
Other versions
WO2011070021A3 (en
Inventor
Sveinung Polden
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
Priority to CN201080054425.0A priority Critical patent/CN102762449B/en
Priority to EA201290465A priority patent/EA021789B1/en
Priority to KR1020127014741A priority patent/KR101431931B1/en
Priority to JP2012542520A priority patent/JP5588518B2/en
Priority to BR112012013828A priority patent/BR112012013828A2/en
Priority to CA2782991A priority patent/CA2782991C/en
Priority to EP10794935.6A priority patent/EP2509856B1/en
Publication of WO2011070021A2 publication Critical patent/WO2011070021A2/en
Publication of WO2011070021A3 publication Critical patent/WO2011070021A3/en

Links

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 radial bearing.
  • the steering engine can be the axial bearing point - also called rudder radial 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 Bl 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.
  • 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 radial 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 radial bearing itself so that the wearable parts can be replaced in an easier way compared to current methods.
  • This object is achieved by the invention as they are defined in the stated features of the claims.
  • 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 are 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 1 1.
  • 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 radial 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 1 1 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 radial 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)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Sliding-Contact Bearings (AREA)
  • Ship Loading And Unloading (AREA)
  • Mounting Of Bearings Or Others (AREA)

Abstract

Device and method for raising a rudder stock (2) on a ship to relieve the rudder radial bearing (16), wherein the rudder stock (2) is equipped with a steering engine fastened to the rudder stock (2) using a hydraulic nut (8), and wherein the steering engine is further connected to the structure of the ship (3). The device is an integrated part of the steering engine and comprises a top cover (6) for the steering engine having an integrated hydraulic cylinder (10), 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).

Description

Title:
Raising a rudder stock on a ship 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 radial 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 Bl 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.
The disadvantages with the prior art is that there are no easy solutions to raise the rudder stock for relieving the rudder radial 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 radial bearing is relieved and thereby replaceable.
In order to raise rotor, rudder and rudder stock so that the rudder radial 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 radial bearing itself so that the wearable parts can be replaced in an easier way compared to current methods. This object is achieved by the invention as they are defined in the stated features of the claims.
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 are 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 1 1. 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 radial 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 radial 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 radial 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 radial bearing 16 the rudderstock and the rudder must be sufficiently lifted so that the force exerted on the rudder radial bearing is removed. Relevant lifting height of the rudder and rudder radial bearing is in this context only a few tenths of a millimetre since the bottom cover 7 and rudder radial 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 1 1 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 radial bearing. The operation is ended by tightening up the fastening- / adjusting devices so that the hydraulic cylinder 10 is fastened to the cover.

Claims

Claims
1. Device for raising a rudder stock (2) on a ship to relieve the rudder radial bearing (16), wherein the rudder stock (2) is equipped with a steering engine fastened to the rudder stock (2) using a hydraulic nut (8), and wherein the steering engine is further connected to the structure of the ship (3), characterized in that the device is an integrated part of the steering engine, and that the device further comprises;
- a top cover (6) for the steering engine having an integrated hydraulic cylinder (10) wherein the hydraulic cylinder comprises;
a hydraulic piston (12)
at least one supply channel (13) for hydraulic oil, and
at least one fastening- / adjusting device (1 1).
2. Device 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. Device 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 device according to claims 1-3 for raising a rudder stock (2) on a ship so that the rudder radial 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
(a) loosening the at least one fastening- /adjusting device (1 1),
(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),
(i) repeating (e) and removing the connections from the supply channel (13), and (j) fastening the at least one fastening- / adjusting device (1 1)
PCT/EP2010/069085 2009-12-09 2010-12-07 Raising a rudder stock on a ship WO2011070021A2 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
CN201080054425.0A CN102762449B (en) 2009-12-09 2010-12-07 Device for raising a rudder stock on a ship
EA201290465A EA021789B1 (en) 2009-12-09 2010-12-07 Raising a rudder stock on a ship
KR1020127014741A KR101431931B1 (en) 2009-12-09 2010-12-07 Device for raising a rudder stock on a ship
JP2012542520A JP5588518B2 (en) 2009-12-09 2010-12-07 Equipment for raising ship ladder stock
BR112012013828A BR112012013828A2 (en) 2009-12-09 2010-12-07 helm stop lifting on a ship
CA2782991A CA2782991C (en) 2009-12-09 2010-12-07 Raising a rudder stock on a ship
EP10794935.6A EP2509856B1 (en) 2009-12-09 2010-12-07 Device for raising a rudder stock on a ship

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NONO20093499 2009-12-09
NO20093499A NO20093499A1 (en) 2009-12-09 2009-12-09 Lifting of rudder stock on ships

Publications (2)

Publication Number Publication Date
WO2011070021A2 true WO2011070021A2 (en) 2011-06-16
WO2011070021A3 WO2011070021A3 (en) 2011-12-22

Family

ID=43708284

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2010/069085 WO2011070021A2 (en) 2009-12-09 2010-12-07 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) NO20093499A1 (en)
WO (1) WO2011070021A2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102951283A (en) * 2011-08-29 2013-03-06 中国科学院沈阳自动化研究所 Connecting rod type hydraulic steering engine
KR20160011981A (en) * 2014-07-23 2016-02-02 삼성중공업 주식회사 Rudder carrier assembly

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Publication number Priority date Publication date Assignee Title
KR20170030895A (en) 2015-09-10 2017-03-20 훌루테크 주식회사 Steering apparatus with movable driving member
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
KR101749255B1 (en) 2015-09-10 2017-07-03 훌루테크 주식회사 Steering apparatus with safety device 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

Citations (3)

* 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
JPS588496A (en) 1981-07-09 1983-01-18 Hitachi Zosen Corp Mounting method of rudder
NO302695B1 (en) 1993-03-26 1998-04-14 Porsgrunn Steering Gear As Device at the helm of a ship

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5431194A (en) * 1977-08-10 1979-03-07 Mitsubishi Heavy Ind Ltd Arrangement for fitting tiller boss to steering shaft of ship
EP0021732B2 (en) * 1979-06-22 1988-04-13 Vickers Limited Hydraulic steering gear for ships
SU1054213A1 (en) * 1982-07-14 1983-11-15 Центральное технико-конструкторское бюро Министерства речного флота РСФСР Bearing assembly for rudder stock
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

Patent Citations (3)

* 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
JPS588496A (en) 1981-07-09 1983-01-18 Hitachi Zosen Corp Mounting method of rudder
NO302695B1 (en) 1993-03-26 1998-04-14 Porsgrunn Steering Gear As Device at the helm of a ship

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102951283A (en) * 2011-08-29 2013-03-06 中国科学院沈阳自动化研究所 Connecting rod type hydraulic steering engine
KR20160011981A (en) * 2014-07-23 2016-02-02 삼성중공업 주식회사 Rudder carrier assembly
KR101616858B1 (en) 2014-07-23 2016-04-29 삼성중공업 주식회사 Rudder carrier assembly

Also Published As

Publication number Publication date
CA2782991C (en) 2014-10-28
NO330414B1 (en) 2011-04-11
NO20093499A1 (en) 2011-04-11
EP2509856A2 (en) 2012-10-17
KR20120092151A (en) 2012-08-20
BR112012013828A2 (en) 2016-05-03
CA2782991A1 (en) 2011-06-16
EP2509856B1 (en) 2016-05-18
CN102762449B (en) 2015-03-18
CN102762449A (en) 2012-10-31
JP2013513510A (en) 2013-04-22
KR101431931B1 (en) 2014-08-19
JP5588518B2 (en) 2014-09-10
WO2011070021A3 (en) 2011-12-22
EA201290465A1 (en) 2012-11-30
EA021789B1 (en) 2015-08-31

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