WO2005021374A1 - Contra-rotating variable pitch propellers fitted on the strut - Google Patents
Contra-rotating variable pitch propellers fitted on the strut Download PDFInfo
- Publication number
- WO2005021374A1 WO2005021374A1 PCT/HR2003/000045 HR0300045W WO2005021374A1 WO 2005021374 A1 WO2005021374 A1 WO 2005021374A1 HR 0300045 W HR0300045 W HR 0300045W WO 2005021374 A1 WO2005021374 A1 WO 2005021374A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- rotating
- contra
- propeller
- propellers
- yokes
- 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.)
- Ceased
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H3/00—Propeller-blade pitch changing
- B63H3/06—Propeller-blade pitch changing characterised by use of non-mechanical actuating means, e.g. electrical
- B63H3/08—Propeller-blade pitch changing characterised by use of non-mechanical actuating means, e.g. electrical fluid
- B63H3/081—Propeller-blade pitch changing characterised by use of non-mechanical actuating means, e.g. electrical fluid actuated by control element coaxial with the propeller shaft
- B63H3/082—Propeller-blade pitch changing characterised by use of non-mechanical actuating means, e.g. electrical fluid actuated by control element coaxial with the propeller shaft the control element being axially reciprocatable
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H5/00—Arrangements on vessels of propulsion elements directly acting on water
- B63H5/07—Arrangements on vessels of propulsion elements directly acting on water of propellers
- B63H5/08—Arrangements on vessels of propulsion elements directly acting on water of propellers of more than one propeller
- B63H5/10—Arrangements on vessels of propulsion elements directly acting on water of propellers of more than one propeller of coaxial type, e.g. of counter-rotative type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H5/00—Arrangements on vessels of propulsion elements directly acting on water
- B63H5/07—Arrangements on vessels of propulsion elements directly acting on water of propellers
- B63H5/125—Arrangements on vessels of propulsion elements directly acting on water of propellers movably mounted with respect to hull, e.g. adjustable in direction, e.g. podded azimuthing thrusters
Definitions
- the inventition relates to a marine propulsion systems, particularly relates to category of propulsion units fitted on the strut underneath ship's hull.
- BACKGROUND ART Strut-mounted propeller(s) are well known arrangement and can be found in fixed strut execution on transverse thruster or in rotatable execution, usually in pairs, for main propulsion of vessels with high maneuverability demands.
- One propeller can be mounted in pulling or pushing position, however, if two propellers are fitted they are on oposite sides of the strut lower body i.e. forward one acts as pulling and aft one as pushing propulsor.
- Vertical strut (1) with lower body (2) is machined to receive fore-aft bolted extensions (3).
- Two fore and aft spiral bevel gears (4) are fitted to inner ends of hollow propeller shafts (5) while outer ends are provide with flanges (6) for propeller hub connection.
- Servo piston (7) bothside provided with pitch control rods (8), fitts into cylinder (9) and rod guides/seals (10).
- Propeller hubs (11) are of ordinary construction (monoblock) comprising blade flanges (12) with pin block (13) quides end yokes (14) with pins (15).
- Patented solution distinguish from ordinary construction in a way that yokes (14) freely rotate on pitch control rods (8).
- Bearings (16) acomplish the function of transmitting longitudinal forces from rods (not rotating) to yokes, rotating with propeller speed.
- Conventional angled gear transmission comprising pair of bevel gears, is modified in a way that smaller gear (17) drives two identical gears (4) arranged simetrically to the driving shaft centreline. These two gears, connected to fore and aft hollow propeller shafts are therefore rotating in oposite directions.
- Servo piston cylinder is provided with hydraulic oil supply connections (18) and with feed-back rod (19).
- Movement of the feed back rod (19) is mechanically transmited to hydraulic oil control valve or to eletrical pitch feed back box in a usual way. Esentially, movement of servo piston (7) and / rods (8) in one direction should bring blades of pulling and pushing propeller to rotate around its own axis in oposite directions.
- Described innovation features simple and robust mechanical solution with a minimum number of moving parts, featuring servo hydraulic oil flow without sliding oil distribution groves and sliding feed back mechanism.
- It can be used for main propulsion as fixed or rotatable units or for tunn'eled transverse thruster.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Transmission Devices (AREA)
Abstract
The invention represents mechanically simple solution for upgrading of contra-rotating propellers with variable pitch ability. This is aimed to enable use of non-reversing, constant speed running prime movers for marine propulsion adding therefore a new value to high efficiency contra rotating propellers in terms of soft thrust reversing and engine overload protection. Monoblock propeller hub (11), hub flange (6), blades (12), pins (15), shaft seals (20) and set of bevel gears (4, 17) needed to put pulling (fore) and pushing (aft) propeller in contra rotation are common and well known components of contra-rotating and variable pitch propellers. Patented solution embodies above components and functions in one simple robust unit owing to built in cylinder (9), non-rotating servo piston (7) with both sides fitted pitch control rods (8) provided with yokes (14) at the end. Yoke pins (15) of fore and aft propellers are fitted diagonally to produce rotation of propeller blades around its own axis in opposite directions. Rotation of yokes around pitch control rods is facilitated by bearings (16) allowing transmission of longitudinal movements between non-rotating (8) and rotating (14) ports. Oil supply connections (18) and feed back rod (19) are integrated in non-rotating lower body housing meaning that conventional oil distribution groves and sliding type feed back mechanism are avoided. The invention can be used for main propulsion in fixed strut or rotatable execution or for tunneled transverse thruster.
Description
CONTRA - ROTATING VARIABLE PITCH PROPELLERS FITTED ON THE STRUT
TECHNICAL FIELD
The inventition relates to a marine propulsion systems, particularly relates to category of propulsion units fitted on the strut underneath ship's hull. BACKGROUND ART Strut-mounted propeller(s) are well known arrangement and can be found in fixed strut execution on transverse thruster or in rotatable execution, usually in pairs, for main propulsion of vessels with high maneuverability demands. One propeller can be mounted in pulling or pushing position, however, if two propellers are fitted they are on oposite sides of the strut lower body i.e. forward one acts as pulling and aft one as pushing propulsor.
In fact, two propellers per one strut are aplicable when propeller diometer is restricted on in cases of electric drive where fore and aft propellers are fitted to electric motor shaft extensions or on some drives with mechanical "Z" drive where contra rotating propellers are aranged in pushing mode. None of this tandem propeller solutions are of variable pitch execution and claimed hydrodinamic efficiency at propeller design point is mainly achieved by proper adoption of the aft propeller to the flow created by the forward propeller and strut. Soft reversing of large podded propulsors is facilitated electronically by frequency control via frequency converter. In case of mechanical Z drive reversing can be done by reversible gear box or by reversing of prime mover. The invention is aimed to solve propeller strut drive arrangement with fore-aft (pulling-pushing) propellers of variable pitch type.
DISCLOSURE OF THE INVENTION
An example of patent aplication for tunneled transverse thruster is shown on the figure.
Vertical strut (1) with lower body (2) is machined to receive fore-aft bolted extensions (3).
Two fore and aft spiral bevel gears (4) are fitted to inner ends of hollow propeller shafts (5) while outer ends are provide with flanges (6) for propeller hub connection.
Servo piston (7), bothside provided with pitch control rods (8), fitts into cylinder (9) and rod guides/seals (10).
Propeller hubs (11) are of ordinary construction (monoblock) comprising blade flanges (12) with pin block (13) quides end yokes (14) with pins (15). Patented solution distinguish from ordinary construction in a way that yokes (14) freely rotate on pitch control rods (8). Bearings (16) acomplish the function of transmitting longitudinal forces from rods (not rotating) to yokes, rotating with propeller speed.
Conventional angled gear transmission, comprising pair of bevel gears, is modified in a way that smaller gear (17) drives two identical gears (4) arranged simetrically to the driving shaft centreline. These two gears, connected to fore and aft hollow propeller shafts are therefore rotating in oposite directions.
Servo piston cylinder is provided with hydraulic oil supply connections (18) and with feed-back rod (19).
Movement of the feed back rod (19) is mechanically transmited to hydraulic oil control valve or to eletrical pitch feed back box in a usual way. Esentially, movement of servo piston (7) and / rods (8) in one direction should bring blades of pulling and pushing propeller to rotate around its own axis in oposite directions.
This is acomplished by provision of yoke pins or yoke pin block guides on the oposite sides of the yokes.
Conventional sealings (20) are provided on both sides of lower body (2) to seal against hydraulic / lub. oil leakages or water intrusion.
Described innovation features simple and robust mechanical solution with a minimum number of moving parts, featuring servo hydraulic oil flow without sliding oil distribution groves and sliding feed back mechanism.
It can be used for main propulsion as fixed or rotatable units or for tunn'eled transverse thruster.
Claims
CLAIM
Patent is requested for marine propulsion system featuring contra rotating variable pitch propellers arranged in pulling / pushing positions on fixed or rotatable strut (1) fomprising one streamlined lower body (2)with built in cylinder (9), fixed extensions (3) carrying hollow propeller shafts (5) driven by set of bevel gears (4) (17) and one non-rotating servo piston (7) with pitch control rods (8) fitted bothsides, acting simultaneously via yokes (14) and diagonally located pins (15) to propeller blades, whereof yokes (14) freely rotate in oposite directions following propeller speed of rotation owing to radial / axial bearings (16) which transmit longitudinal forces irrespectively of rotating status of the embodied components.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2003263373A AU2003263373A1 (en) | 2003-09-01 | 2003-09-01 | Contra-rotating variable pitch propellers fitted on the strut |
| PCT/HR2003/000045 WO2005021374A1 (en) | 2003-09-01 | 2003-09-01 | Contra-rotating variable pitch propellers fitted on the strut |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/HR2003/000045 WO2005021374A1 (en) | 2003-09-01 | 2003-09-01 | Contra-rotating variable pitch propellers fitted on the strut |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2005021374A1 true WO2005021374A1 (en) | 2005-03-10 |
Family
ID=34259860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/HR2003/000045 Ceased WO2005021374A1 (en) | 2003-09-01 | 2003-09-01 | Contra-rotating variable pitch propellers fitted on the strut |
Country Status (2)
| Country | Link |
|---|---|
| AU (1) | AU2003263373A1 (en) |
| WO (1) | WO2005021374A1 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012022501A1 (en) | 2010-08-17 | 2012-02-23 | Siemens Aktiengesellschaft | Variable-pitch propeller or repeller |
| CN103758575A (en) * | 2013-02-04 | 2014-04-30 | 摩尔动力(北京)技术股份有限公司 | Idler shaft opposite rotating body for engine |
| CN105799899A (en) * | 2016-03-15 | 2016-07-27 | 宁波市鄞州发辉机械科技有限公司 | Transmission connection device of tubular reversing propellers |
| CN107351974A (en) * | 2016-09-19 | 2017-11-17 | 北车船舶与海洋工程发展有限公司 | A kind of new gondola propeller housing structure |
| CN108609151A (en) * | 2018-06-07 | 2018-10-02 | 马鞍山海明船舶配件有限公司 | A kind of controllable three-bladed propeller based on physics kinetic energy |
| CN110316346A (en) * | 2019-05-16 | 2019-10-11 | 杭州前进齿轮箱集团股份有限公司 | Oil distributor on a kind of axis for controllable pitch propeller |
| CN111486331A (en) * | 2020-04-14 | 2020-08-04 | 南京高精船用设备有限公司 | Forced lubrication cooling's epaxial oil distributor structure |
| CN114933002A (en) * | 2022-06-07 | 2022-08-23 | 合肥倍豪海洋装备技术有限公司 | Twisted lower shell of contrarotating full-rotation propelling device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE453816A (en) * | ||||
| DE1037908B (en) * | 1956-12-10 | 1958-08-28 | Schiffbau Projekt Und Konstruk | Z-gear for propeller drive of watercraft |
| JPS58191690A (en) * | 1982-04-30 | 1983-11-08 | Ishikawajima Harima Heavy Ind Co Ltd | Variable pitch propeller |
| US6287077B1 (en) * | 1999-02-18 | 2001-09-11 | Nasyc Holding S. A. | Adjustable-pitch boat propeller |
-
2003
- 2003-09-01 AU AU2003263373A patent/AU2003263373A1/en not_active Abandoned
- 2003-09-01 WO PCT/HR2003/000045 patent/WO2005021374A1/en not_active Ceased
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE453816A (en) * | ||||
| DE1037908B (en) * | 1956-12-10 | 1958-08-28 | Schiffbau Projekt Und Konstruk | Z-gear for propeller drive of watercraft |
| JPS58191690A (en) * | 1982-04-30 | 1983-11-08 | Ishikawajima Harima Heavy Ind Co Ltd | Variable pitch propeller |
| US6287077B1 (en) * | 1999-02-18 | 2001-09-11 | Nasyc Holding S. A. | Adjustable-pitch boat propeller |
Non-Patent Citations (1)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN vol. 008, no. 035 (M - 276) 15 February 1984 (1984-02-15) * |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012022501A1 (en) | 2010-08-17 | 2012-02-23 | Siemens Aktiengesellschaft | Variable-pitch propeller or repeller |
| DE102010039394A1 (en) | 2010-08-17 | 2012-02-23 | Siemens Aktiengesellschaft | Variable pitch propeller or repeller |
| JP2013539433A (en) * | 2010-08-17 | 2013-10-24 | シーメンス アクチエンゲゼルシヤフト | Variable pitch propeller or repeller |
| US9476311B2 (en) | 2010-08-17 | 2016-10-25 | Siemens Aktiengesellschaft | Variable-pitch propeller or repeller |
| CN103758575A (en) * | 2013-02-04 | 2014-04-30 | 摩尔动力(北京)技术股份有限公司 | Idler shaft opposite rotating body for engine |
| CN105799899A (en) * | 2016-03-15 | 2016-07-27 | 宁波市鄞州发辉机械科技有限公司 | Transmission connection device of tubular reversing propellers |
| CN107351974A (en) * | 2016-09-19 | 2017-11-17 | 北车船舶与海洋工程发展有限公司 | A kind of new gondola propeller housing structure |
| CN108609151A (en) * | 2018-06-07 | 2018-10-02 | 马鞍山海明船舶配件有限公司 | A kind of controllable three-bladed propeller based on physics kinetic energy |
| CN110316346A (en) * | 2019-05-16 | 2019-10-11 | 杭州前进齿轮箱集团股份有限公司 | Oil distributor on a kind of axis for controllable pitch propeller |
| CN110316346B (en) * | 2019-05-16 | 2023-12-01 | 杭州前进齿轮箱集团股份有限公司 | On-shaft oil distributor for adjustable propeller |
| CN111486331A (en) * | 2020-04-14 | 2020-08-04 | 南京高精船用设备有限公司 | Forced lubrication cooling's epaxial oil distributor structure |
| CN111486331B (en) * | 2020-04-14 | 2021-08-06 | 南京高精船用设备有限公司 | Forced lubrication cooling's epaxial oil distributor structure |
| CN114933002A (en) * | 2022-06-07 | 2022-08-23 | 合肥倍豪海洋装备技术有限公司 | Twisted lower shell of contrarotating full-rotation propelling device |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2003263373A1 (en) | 2005-03-16 |
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