WO2002090181A1 - Vessel propulsion by counter-rotative vessel screw-propellers mounted on a single shaft - Google Patents

Vessel propulsion by counter-rotative vessel screw-propellers mounted on a single shaft Download PDF

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Publication number
WO2002090181A1
WO2002090181A1 PCT/HR2002/000026 HR0200026W WO02090181A1 WO 2002090181 A1 WO2002090181 A1 WO 2002090181A1 HR 0200026 W HR0200026 W HR 0200026W WO 02090181 A1 WO02090181 A1 WO 02090181A1
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WO
WIPO (PCT)
Prior art keywords
shaft
screw
aft
propeller
vessel
Prior art date
Application number
PCT/HR2002/000026
Other languages
French (fr)
Inventor
Tedy Popovac
Original Assignee
Tedy Popovac
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 Tedy Popovac filed Critical Tedy Popovac
Publication of WO2002090181A1 publication Critical patent/WO2002090181A1/en

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Classifications

    • 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

Definitions

  • the invention relates to a solution of the problem of vessel propulsion by two screw-propellers mounted on a single shaft and rotating in opposite directions.
  • International Patent Classification it is classified as B63H 5/10, Marine Propulsion or Steering - Arrangements on vessels of propulsion elements directly acting on water - of coaxial type, e.g. of counter-rotative type.
  • the essence of the invention is powering of vessels by two counter-rotative screw- propellers, both of them being fixed on a single shaft.
  • the essential parts are shaft, screw-propellers, clutches, gears and bearings.
  • the aft screw-propeller that rotates with the shaft clockwise and, at the same time, by means of clutches and radial and axial bevelled gears, transmits rotation to the fore screw-propeller that is, by means of bevelled-roller bearings, mounted at the same shaft, closer to the vessel, and rotating in the opposite, clockwise, direction.
  • Figure 1 shows vessel propulsion by counter-rotative screw-propellers on a single shaft - front view.
  • Figure 2. shows vessel propulsion shown in Fig. 1 - back view.
  • Figure 3. shows vessel propulsion, cross section F-F in Fig. 2.
  • Figure 4. shows vessel propulsion, cross section G-G in Fig. 1.
  • Figure 5. shows vessel propulsion by counter-rotative screw-propellers on a single shaft - perspective view from back and above.
  • the vessel propulsion by counter-rotative screw-propellers on a single shaft includes the shaft 1 , on which there are the following assemblies: assembly A, by which the propulsion is connected to the ship's main engine; assembly B, in which rotates the fore screw-propeller; assembly C, in which rotate the fore and the aft axial bevelled gears; assembly D, in which rotates the aft screw-propeller; and assembly E, in which rotates the middle radial bevelled gear and by which the propulsion is connected to the ship's lubrication oil supply.
  • assemblies A, B, C, D and E comprise the following parts:
  • assembly A comprises: clutch stream cap 14, screws 13, shaft clutch 6, clutch base 12 and clutch screw 11 ;
  • assembly B comprises: fore screw-propeller stream cap 15, safety pin 16, gaskets 17, gasket plate 18, shim 19, bevelled-roller bearing 20, fore screw- propeller 4, bevelled-roller bearing 21, shim 22, pin 23, inner clutch 24 and screws 25;
  • assembly C comprises: housing 2, gaskets 26, indented clutches 27, shaft springs 28, pins 29, bearing pins 30, ball bearings 31, needle bearings 32, sliding bearings 33, fore axial bevelled gear 7, aft axial bevelled gear 8, outlet screw 35 and outlet gasket 36;
  • assembly D comprises: inner clutch 24, screws 25, shaft spring 34, aft screw- propeller 5, stream-cap ring 45, aft screw-propeller stream cap 38 and pin 37;
  • assembly E comprises: base 3, base ring 44, middle radial bevelled gear 9, sliding shrouds 39, axial bearing 40, middle radial gear housing 41 , assembly body 10, screws 42 and oil-vessel insert 43.
  • the aft screw-propeller 5, in the assembly D, by the shaft spring 34, is firmly keyed by bevelled fay to the shaft 1 , rotating with it clockwise, creating thereby forward propulsion.
  • the inner clutch 24 which, at its opposite end, has an opening entered by the indented clutch 27 tooth, which clutch is through the shaft spring 28 firmly fixed to the fore axial bevelled gear 7.
  • the fore axial bevelled gear 7 rotates around the shaft 1 , over the sliding bearings 32 which are here to make the shaft rotate in one direction and the gear 7 in the opposite.
  • the middle radial bevelled gear 9 powered by the aft bevelled gear 8.
  • the base 3 is placed in the body 10 of the assembly E.
  • the axial bearing 40 and the sliding shrouds 39 provide rotation of the middle gear 9 and taking over of the axial force created by the gear because of its bevelled teeth.
  • the rotation is transmitted from the shaft 1 and the aft screw-propeller 5, which rotates clockwise, to the aft axial bevelled gear 8, which also rotates clockwise, and by the middle radial bevelled gear 9 to the fore axial bevelled gear 7, which rotates anti-clockwise, and the fore screw-propeller 4, which also rotates anticlockwise, that is, opposite from the aft screw-propeller 5.
  • Both screw-propellers create forward propulsion.
  • the stream cap of the aft screw-propeller 38 tightens the screw-propeller 5 against the shaft 1 cone, creating a better hydrodynamic shape.
  • the shaft 1 is firmly fixed to the shaft clutch 6.
  • the shaft 1 is connected through the shaft clutch 6 to the vessel main engine.
  • Vessel propulsion by counter-rotative screw-propellers on a single shaft may be applied to any vessel.
  • the propulsion assembly may be taken off, dismantled, serviced and mounted back to the vessel very quickly.

Abstract

The vessel propulsion by counter-rotative screw-propellers on a single shaft consists of the shaft (1) on which there are assemblies (A), (B), (C), (D) and (E). The propulsion device is connected by the clutch (6) to the vessel's main engine. In the assembly (B) there is the fore screw-propeller (4) that rotates in the direction opposite to that of the shaft. In the assembly (C), in the housing (2), there are placed axially the fore axial bevelled gear (7) and the aft axial bevelled gear (8), rotating around the shaft. In the assembly (D) there is the aft screw-propeller (5) firmly fixed to the shaft (1) and rotating in the same direction as the shaft, whereas in the assembly (E) there is placed radially the middle radial bevelled gear (9) powered by the aft axial bevelled gear (8). The shaft (1) and the aft screw-propeller (5) clockwise rotation is transmitted to the aft axial bevelled gears (8), that also rotates clockwise, and than via the middle bevelled gear (9) to the fore axial bevelled gear (7), that rotates anti-clockwise, and to the fore screw-propeller (4) that also rotates anti-clockwise, that is, in the direction opposite to that of the aft screw-propeller (5). Both screw-propellers create the vessel forward propulsion.

Description

VESSEL PROPULSION BY COUNTER-ROTATIVE VESSEL SCREW-PROPELLERS MOUNTED ON A SINGLE SHAFT
INVENTION DESCRIPTION
1. FIELD OF APPLICATION
The invention relates to a solution of the problem of vessel propulsion by two screw-propellers mounted on a single shaft and rotating in opposite directions. In the International Patent Classification it is classified as B63H 5/10, Marine Propulsion or Steering - Arrangements on vessels of propulsion elements directly acting on water - of coaxial type, e.g. of counter-rotative type.
2. TECHNICAL PROBLEM
Since 1836, when Erickson invented vessel propulsion by two screw-propellers that rotate in opposite directions, his solution has not been significantly modified. Erickson solved the problem of propulsion by two screw-propellers by fixing one screw-propeller on a hollow shaft and the other one on a solid shaft that passes through the hollow one. One shaft rotates clockwise and the other one anticlockwise. This significantly increases the screw-propeller utilisation, however, the solution has never been applied at a larger scale because of the complicate reversal mechanism. The problem is in utilising a hollow shaft and a solid shaft that passes through it, with small bearings between them that cannot stand larger loads, which makes its construction complicated and increases the number of mechanical parts.
3. STATE OF THE ART
All solutions known so far are based on one screw-propeller being mounted on a hollow shaft and the other on a solid shaft that passes through the hollow one. The screw-propellers are powered by three bevelled gears, two of them being placed axially and the third radially. The driving torque from the ship's main engine comes to the radial gear which then powers the other two bevelled gears. One axial gear is mounted on the solid shaft, with which it rotates in one direction, whereas the other axial bevelled gear is mounted on the hollow shaft and rotates with it in the opposite direction. Between the shafts there are small bearings that must stand both shafts' rotation, one of them being clockwise and the other anti-clockwise. Presently, it is being used the so-called Z-drive with two screw-propellers that rotate in opposite directions and their radial torque forces canceling each other out. This property is used mostly for military purposes, for powering of torpedoes, enabling them linear, sway free, motion. Such solution is efficient, although it creates large mechanical losses caused by the complicated reversal mechanism.
4. DISCLOSURE OF THE INVENTION
The essence of the invention is powering of vessels by two counter-rotative screw- propellers, both of them being fixed on a single shaft. The essential parts are shaft, screw-propellers, clutches, gears and bearings. At the distal end of the shaft, powered by the ship's main engine, there is keyed the aft screw-propeller that rotates with the shaft clockwise and, at the same time, by means of clutches and radial and axial bevelled gears, transmits rotation to the fore screw-propeller that is, by means of bevelled-roller bearings, mounted at the same shaft, closer to the vessel, and rotating in the opposite, clockwise, direction. This way, the number of mechanical parts is significantly decreased and the construction simplified.
Mechanical losses are decreased and, thereby, the power utilisation increased. This increases durability and enables easier maintenance of the drive unit in its everyday use. The invention enables wide application on numerous kinds of vessels.
5. ILLUSTRATION DESCRIPTIONS
Figure 1. shows vessel propulsion by counter-rotative screw-propellers on a single shaft - front view.
Figure 2. shows vessel propulsion shown in Fig. 1 - back view. Figure 3. shows vessel propulsion, cross section F-F in Fig. 2. Figure 4. shows vessel propulsion, cross section G-G in Fig. 1. Figure 5. shows vessel propulsion by counter-rotative screw-propellers on a single shaft - perspective view from back and above.
6. DETAILED DESCRIPTION OF INVENTION EMBODIMENT The vessel propulsion by counter-rotative screw-propellers on a single shaft includes the shaft 1 , on which there are the following assemblies: assembly A, by which the propulsion is connected to the ship's main engine; assembly B, in which rotates the fore screw-propeller; assembly C, in which rotate the fore and the aft axial bevelled gears; assembly D, in which rotates the aft screw-propeller; and assembly E, in which rotates the middle radial bevelled gear and by which the propulsion is connected to the ship's lubrication oil supply.
As shown in Figs. 3 and 4, assemblies A, B, C, D and E comprise the following parts:
• assembly A comprises: clutch stream cap 14, screws 13, shaft clutch 6, clutch base 12 and clutch screw 11 ;
• assembly B comprises: fore screw-propeller stream cap 15, safety pin 16, gaskets 17, gasket plate 18, shim 19, bevelled-roller bearing 20, fore screw- propeller 4, bevelled-roller bearing 21, shim 22, pin 23, inner clutch 24 and screws 25;
• assembly C comprises: housing 2, gaskets 26, indented clutches 27, shaft springs 28, pins 29, bearing pins 30, ball bearings 31, needle bearings 32, sliding bearings 33, fore axial bevelled gear 7, aft axial bevelled gear 8, outlet screw 35 and outlet gasket 36;
• assembly D comprises: inner clutch 24, screws 25, shaft spring 34, aft screw- propeller 5, stream-cap ring 45, aft screw-propeller stream cap 38 and pin 37;
• assembly E comprises: base 3, base ring 44, middle radial bevelled gear 9, sliding shrouds 39, axial bearing 40, middle radial gear housing 41 , assembly body 10, screws 42 and oil-vessel insert 43. The aft screw-propeller 5, in the assembly D, by the shaft spring 34, is firmly keyed by bevelled fay to the shaft 1 , rotating with it clockwise, creating thereby forward propulsion.
To the aft screw-propeller 5 there is fixed the inner clutch 24 which, at its opposite end, has an opening entered by the indented clutch 27 tooth, which clutch is firmly fixed by the shaft spring 28 to the aft axial bevelled gear 8. The aft axial bevelled gear 8 rotates around the shaft 1, over the sliding bearings 33 which center the shaft 1 within the gear 8.
To the screw-propeller 4, in the assembly B, there is fixed the inner clutch 24 which, at its opposite end, has an opening entered by the indented clutch 27 tooth, which clutch is through the shaft spring 28 firmly fixed to the fore axial bevelled gear 7. The fore axial bevelled gear 7 rotates around the shaft 1 , over the sliding bearings 32 which are here to make the shaft rotate in one direction and the gear 7 in the opposite.
The fore screw-propeller 4, over the bevelled-roller bearings 20 that are firmly fixed onto the shaft and provide centering of the screw-propeller 4 at the shaft, rotates around the shaft 1 anti-clockwise, creating thereby forward propulsion.
In the assembly C, between the housing 2, which stands still and does not rotate around the shaft 1, and the fore and the aft axial bevelled gears 7 and 8, that rotate around the shaft 1, there are ball bearings 31.
Between the aft axial bevelled gear 8 and the fore axial bevelled gear 7, there is placed, perpendicularly and within the base 3, the middle radial bevelled gear 9, powered by the aft bevelled gear 8. The base 3 is placed in the body 10 of the assembly E. The axial bearing 40 and the sliding shrouds 39 provide rotation of the middle gear 9 and taking over of the axial force created by the gear because of its bevelled teeth.
The rotation is transmitted from the shaft 1 and the aft screw-propeller 5, which rotates clockwise, to the aft axial bevelled gear 8, which also rotates clockwise, and by the middle radial bevelled gear 9 to the fore axial bevelled gear 7, which rotates anti-clockwise, and the fore screw-propeller 4, which also rotates anticlockwise, that is, opposite from the aft screw-propeller 5. Both screw-propellers create forward propulsion.
To the gasket plate 18 there is screwed the stream cap 15 of the fore screw- propeller 4, creating a better hydrodynamic shape.
The stream cap of the aft screw-propeller 38 tightens the screw-propeller 5 against the shaft 1 cone, creating a better hydrodynamic shape.
In the assembly A, the shaft 1 is firmly fixed to the shaft clutch 6. The shaft 1 is connected through the shaft clutch 6 to the vessel main engine. On the shaft clutch 6 there is screwed the stream cap 14.
In this invention description, the direction of rotation of the shaft 1 and the screw- propellers 4 and 5 is referred to watched in the stern-to-bow direction.
7. INVENTION APPLICATION
Vessel propulsion by counter-rotative screw-propellers on a single shaft, according to this invention, may be applied to any vessel.
After taking the vessel out of water, thanks to its simple embodiment, the propulsion assembly may be taken off, dismantled, serviced and mounted back to the vessel very quickly.

Claims

PATENT CLAIMS
1. Vessel propulsion by counter-rotative screw-propellers on a single shaft, wh e re in , it consists of the shaft (1) on which there are assemblies (A), (B), (C), (D) and (E); it is connected through the assembly (A) to the vessel's main engine; in the assembly (B) there is the fore screw-propeller (4) that rotates on bevelled-roller bearings (20) and (21) in the direction opposite of direction of the shaft (1); in the assembly (C), in the housing (2), there are the fore axial bevelled gear (7) and the aft axial bevelled gear (8), rotating in mutually opposite directions; in the assembly (D) there is the aft screw- propeller (5) firmly fixed to the shaft (1) and rotating in the same direction as the shaft; in the assembly (E) there is the middle bevelled-roller bearing (9) powered by the aft axial bevelled gear (8); the assembly (E) is connected, through the oil-vessel insert (43), to the lubricating oil supply in the vessel.
2. Vessel propulsion as claimed in Claim 1, wh e re in the shaft clutch (6), to which it is screwed the stream cap (14), in the assembly (A), is at one end firmly fixed to the shaft (1), and at the other one to the vessel's main engine.
3. Vessel propulsion as claimed in Claim 1, wh e re in the aft screw-propeller (5) is firmly keyed, by the shaft spring (34), to the shaft (1), rotating with it clockwise, creating thereby forward propulsion.
4. Vessel propulsion as claimed in Claim 1, wh re in to the aft screw- propeller (5) there is fixed the inner clutch (24) which, at its opposite end, has the opening in which enters the indented clutch (27) tooth, which clutch is firmly fixed, by the shaft spring (28), to the aft axial bevelled gear (8) which rotates around the shaft (1) over sliding bearings (33) that enable the shaft (1) to rotate in one direction and the gear (8) in the opposite.
5. Vessel propulsion as claimed in Claim 1 , wh e re in the fore screw-propeller (4) is impaled via bevelled-roller bearings (20) and (21) on the shaft (1), rotating around it anti-clockwise, creating thereby forward propulsion.
6. Vessel propulsion as claimed in Claim 1, wh e rein to the fore screw- propeller (4) there is fixed the inner clutch (24) which, at its opposite end, has the opening in which enters the indented clutch (27) tooth, which clutch is firmly fixed, by the shaft spring (28), to the aft fore bevelled gear (7) which rotates around the shaft (1) over needle bearings (32) that enable the shaft (1) to rotate in one direction and the gear (7) in the opposite one.
7. Vessel propulsion as claimed in Claims 1-6, wh ere in between the housing (2), which stands still and does not rotate around the shaft (1), and the fore and aft bevelled gears (7) and (8), which rotate around the shaft (1), there are ball bearings (31).
8. Vessel propulsion as claimed in Claim 1, wh er in between the aft axial bevelled gear (8) and the fore axial bevelled gear (7), in the base (3), there is radially placed the middle bevelled gear (9), powered by the aft axial bevelled gear (8); the base (3) making a part of the assembly (10) consisting of the axial bearing (40) and the sliding shrouds (39) that take over the axial force produced by bevelled teeth of the middle bevelled gear (9).
9. Vessel propulsion as claimed in Claims 1-8, wh re in the rotation is transmitted from the shaft (1) and the aft screw-propeller (5), which rotates clockwise, to the aft axial bevelled gear (8), which also rotates clockwise, and then via the middle radial bevelled gear (9), to the fore axial bevelled gear (7), which rotates anti-clockwise, and to the fore screw-propeller (4), which also rotates anti-clockwise, that is, opposite than the aft screw-propeller (5), both screw-propellers creating vessel forward propulsion.
10. Vessel propulsion as claimed in Claims 1-9, wh erein in the assembly (A) and at the fore screw-propeller (4) and the aft screw-propeller (5), there are stream caps (14), (15) and (38) that improve the assembly hydrodynamic shape.
PCT/HR2002/000026 2001-05-10 2002-05-06 Vessel propulsion by counter-rotative vessel screw-propellers mounted on a single shaft WO2002090181A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
HRP010329A 2001-05-10
HR20010329A HRP20010329B1 (en) 2001-05-10 2001-05-10 Propulsion of vessels by means of counter-rotative screws mounted on one driving shaft

Publications (1)

Publication Number Publication Date
WO2002090181A1 true WO2002090181A1 (en) 2002-11-14

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PCT/HR2002/000026 WO2002090181A1 (en) 2001-05-10 2002-05-06 Vessel propulsion by counter-rotative vessel screw-propellers mounted on a single shaft

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2202143A1 (en) * 2008-12-23 2010-06-30 Comercial Gallega de Maquinaria S.L. Contra-rotating propeller propulsion system for ships

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2282266A (en) * 1939-11-08 1942-05-05 Henry S Swaskey Coaxial propeller drive and mounting
EP0438087A1 (en) * 1990-01-15 1991-07-24 Klaus-Dieter Kempf Shafting strut for ship's propulsion
US5232386A (en) * 1992-12-10 1993-08-03 Gifford William J Counter rotating strut drive
US6220906B1 (en) * 1999-10-04 2001-04-24 The United States Of America As Represented By The Secretary Of The Navy Marine propulsion assembly

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2058361A (en) * 1935-06-04 1936-10-20 Starr K Sherwood Propeller
US3087553A (en) * 1962-01-23 1963-04-30 Paul M Kostyun Counter rotating propeller drive
US5643025A (en) * 1995-01-31 1997-07-01 Sanshin Kogyo Kabushiki Kaisha Transmission lubrication system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2282266A (en) * 1939-11-08 1942-05-05 Henry S Swaskey Coaxial propeller drive and mounting
EP0438087A1 (en) * 1990-01-15 1991-07-24 Klaus-Dieter Kempf Shafting strut for ship's propulsion
US5232386A (en) * 1992-12-10 1993-08-03 Gifford William J Counter rotating strut drive
US6220906B1 (en) * 1999-10-04 2001-04-24 The United States Of America As Represented By The Secretary Of The Navy Marine propulsion assembly

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2202143A1 (en) * 2008-12-23 2010-06-30 Comercial Gallega de Maquinaria S.L. Contra-rotating propeller propulsion system for ships

Also Published As

Publication number Publication date
HRP20010329B1 (en) 2009-05-31
HRP20010329A2 (en) 2002-12-31

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