EP2722269B1 - Propulsion device for ship and ship having same - Google Patents
Propulsion device for ship and ship having same Download PDFInfo
- Publication number
- EP2722269B1 EP2722269B1 EP11867726.9A EP11867726A EP2722269B1 EP 2722269 B1 EP2722269 B1 EP 2722269B1 EP 11867726 A EP11867726 A EP 11867726A EP 2722269 B1 EP2722269 B1 EP 2722269B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bevel gear
- propeller
- drive shaft
- hub
- shaft
- 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.)
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Links
- 238000007789 sealing Methods 0.000 claims description 34
- 230000001141 propulsive effect Effects 0.000 description 21
- 238000010168 coupling process Methods 0.000 description 14
- 238000005859 coupling reaction Methods 0.000 description 13
- 230000033001 locomotion Effects 0.000 description 12
- 230000008878 coupling Effects 0.000 description 11
- 238000009434 installation Methods 0.000 description 10
- 238000012856 packing Methods 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 239000000314 lubricant Substances 0.000 description 6
- 238000005461 lubrication Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000003014 reinforcing effect Effects 0.000 description 5
- 239000012530 fluid Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000009545 invasion Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
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- 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
- B63H21/00—Use of propulsion power plant or units on vessels
- B63H21/38—Apparatus or methods specially adapted for use on marine vessels, for handling power plant or unit liquids, e.g. lubricants, coolants, fuels or the like
- B63H21/386—Apparatus or methods specially adapted for use on marine vessels, for handling power plant or unit liquids, e.g. lubricants, coolants, fuels or the like for handling lubrication liquids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H23/00—Transmitting power from propulsion power plant to propulsive elements
- B63H23/02—Transmitting power from propulsion power plant to propulsive elements with mechanical gearing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H23/00—Transmitting power from propulsion power plant to propulsive elements
- B63H23/02—Transmitting power from propulsion power plant to propulsive elements with mechanical gearing
- B63H23/06—Transmitting power from propulsion power plant to propulsive elements with mechanical gearing for transmitting drive from a single propulsion power unit
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H23/00—Transmitting power from propulsion power plant to propulsive elements
- B63H23/32—Other parts
- B63H23/36—Shaft tubes
-
- 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
- B63H2005/106—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 with drive shafts of second or further propellers co-axially passing through hub of first propeller, e.g. counter-rotating tandem propellers with co-axial drive shafts
-
- 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
- B63H2005/1254—Podded azimuthing thrusters, i.e. podded thruster units arranged inboard for rotation about vertical axis
- B63H2005/1256—Podded azimuthing thrusters, i.e. podded thruster units arranged inboard for rotation about vertical axis with mechanical power transmission to propellers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H23/00—Transmitting power from propulsion power plant to propulsive elements
- B63H23/02—Transmitting power from propulsion power plant to propulsive elements with mechanical gearing
- B63H23/06—Transmitting power from propulsion power plant to propulsive elements with mechanical gearing for transmitting drive from a single propulsion power unit
- B63H2023/062—Transmitting power from propulsion power plant to propulsive elements with mechanical gearing for transmitting drive from a single propulsion power unit comprising means for simultaneously driving two or more main transmitting elements, e.g. drive shafts
- B63H2023/067—Transmitting power from propulsion power plant to propulsive elements with mechanical gearing for transmitting drive from a single propulsion power unit comprising means for simultaneously driving two or more main transmitting elements, e.g. drive shafts the elements being formed by two or more coaxial shafts, e.g. counter-rotating shafts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H23/00—Transmitting power from propulsion power plant to propulsive elements
- B63H23/32—Other parts
- B63H23/321—Bearings or seals specially adapted for propeller shafts
- B63H2023/323—Bearings for coaxial propeller shafts, e.g. for driving propellers of the counter-rotative type
Description
- Embodiments of the present invention relate to a ship propulsion device and a ship having the same, and more particularly to a ship propulsion device in which two propellers generate propulsive force via counter rotation thereof and a ship having the same.
- Ships have a propulsion device to generate propulsive force for sailing. In general, a single propeller is used in the propulsion device. However, the propulsion device having a single propeller cannot acquire propulsive force from rotational energy of water streams, and thus causes substantial energy loss.
- A Counter Rotating Propeller (CRP) type propulsion device is a device that acquires propulsive force from rotational energy without energy loss. In the counter rotating propeller type propulsion device, two propellers installed on the same axis generate propulsive force via counter rotation thereof. A rear propeller of the counter rotating propeller type propulsion device is rotated in reverse with respect to a rotating direction of a front propeller, thereby acquiring propulsive force from rotational energy of fluid caused by the front propeller. Accordingly, the counter rotating propeller type propulsion device may exhibit higher propulsion performance than the aforementioned propulsion device having a single propeller.
- The counter rotating propeller type propulsion device includes an inner shaft connected to an engine within a hull, a rear propeller coupled to a rear end of the inner shaft, a hollow outer shaft rotatably installed around an outer surface of the inner shaft, and a front propeller coupled to a rear end of the outer shaft. In addition, the counter rotating propeller type propulsion device includes a counter rotation unit installed within the hull to reverse rotation of the inner shaft and transmit reversed rotation to the outer shaft. A typical planetary gear mechanism is used as the counter rotation unit.
- However, in the case of the above-described counter rotating propeller type propulsion device, the hollow outer shaft has difficulty in center alignment with respect to the inner shaft upon installation of the counter rotating propeller type propulsion device to a ship. In addition, the outer shaft needs an increased lubrication area for reduction in friction between the inner shaft and the outer shaft. The counter rotation of the inner shaft and the outer shaft causes shear of a lubrication layer between the inner shaft and the outer shaft, which makes it difficult to realize efficient lubrication.
- Meanwhile, in the case of a typical azimuth thruster system, a propeller is rotatable within a range of 360 degrees to enable free forward and rearward propulsion or rotation of a ship. For example, azimuth thrusters, azipods, and the like are used in the azimuth thruster system. The azimuth thruster system is used in various ships including drill ships, icebreakers, shuttle tankers, floating production storage and offloading (FPSO) vessels, polar sailing cargo ships, passenger ships, and the like, owing to control performance and various other advantages.
- However, in the case of applying a propulsion method of the above-described counter rotating propeller type propulsion device to the typical azimuth thruster system, the same problems as those of the typical counter rotating propeller type propulsion device may occur, and there is a need for a more effective counter rotating propeller type propulsion device.
JP09030496 A - It is an embodiment of the present invention to provide a ship propulsion device which may realize counter rotation of two propellers even without an outer shaft and a ship having the same.
- In addition, it is another embodiment of the present invention to provide a ship propulsion device which applies a propulsion method to enable counter rotation of two propellers without an outer shaft to an azimuth propulsion method and a ship having the same.
- In accordance with one aspect of the present invention, a ship propulsion device is provided according to
claim 1. - The counter rotation unit may further include a shaft of an intermediate bevel gear, the shaft extending in a direction crossing the first drive shaft to support the intermediate bevel gear.
- A bearing may be provided between the intermediate bevel gear and the intermediate bevel gear shaft supporting the intermediate bevel gear for smooth rotation of the intermediate bevel gear.
- A first cylindrical lining attached to a front surface of a hub of the front propeller for sealing between the hub of the front propeller and a rear surface of the housing surrounding the second drive shaft, and a first cylindrical sealing member installed to the rear surface of the housing so as to come into contact with an outer surface of the first lining may further be provided.
- A second cylindrical lining attached to a front surface of a hub of the rear propeller for sealing between the hub of the rear propeller and a hub of the front propeller, and a second cylindrical sealing member installed to a rear surface of the front propeller so as to come into contact with an outer surface of the second lining may further be provided.
- In accordance with a further aspect of the present invention, a ship including a ship propulsion device is provided.
- A ship propulsion device and a ship having the same according to the embodiment of the present invention may realize counter rotation of two propellers without an outer shaft.
- Further, applying a propulsion method that enables counter rotation of two propellers without the outer shaft to an azimuth propulsion method may enhance propulsion efficiency.
- Furthermore, owing to absence of the outer shaft, installation of a drive shaft as well as center alignment of the installed drive shaft may be easily implemented.
- In addition, absence of the outer shaft may reduce a required lubrication area than the related art and minimize problems due to lubrication.
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FIG. 1 is a sectional view showing a propulsion device applied to a ship according to an embodiment of the present invention. -
FIG. 2 is a sectional view of the propulsion device according to the embodiment of the present invention. -
FIG. 3 is a sectional view of a first sealing unit of the propulsion device according to the embodiment of the present invention. -
FIG. 4 is an exploded perspective view of the first sealing unit of the propulsion device according to the embodiment of the present invention. -
FIG. 5 is a sectional view of a second sealing unit of the propulsion device according to the embodiment of the present invention. - The exemplary embodiments of the present invention will hereinafter be described in detail with reference to the accompanying drawings.
- As exemplarily shown in
FIG. 1 , the propulsion device according to the embodiment of the present invention is a counter rotating propeller type propulsion device which generates propulsive force via counter rotation of twopropellers propellers second drive shaft 10a which penetrates atail 3 of ahull 1 and is installed perpendicular to afirst drive shaft 10. In this case, a drive source 140 (e.g., motor, generator, or engine) to rotate thesecond drive shaft 10a is provided within thehull 1. The propulsion device may include asteering unit 150 within thehull 1 to change the direction of propulsive force applied to thehull 1 by thefront propeller 30 and therear propeller 20 to all directions (360 degrees). In addition, the propulsion device may enhance propulsion efficiency using aduct 40 installed to surround thepropellers duct 40 may have a hydrodynamic streamlined shape. - As exemplarily shown in
FIGS. 1 and2 , the propulsion device according to the embodiment of the present invention includes therear propeller 20 fixed to thefirst drive shaft 10, thefront propeller 30 rotatably supported by thefirst drive shaft 10 in front of therear propeller 20, acounter rotation unit 70 to cause counter rotation of thefront propeller 30 and therear propeller 20 based on rotation of thesecond drive shaft 10a which penetrates thetail 3 of thehull 1 and is installed perpendicular to thefirst drive shaft 10, and ahousing 130 installed to surround thesecond drive shaft 10a and thecounter rotation unit 70. - The
first drive shaft 10, as exemplarily shown inFIG. 2 , is provided with abearing 139 at a front end of thefirst drive shaft 10 that is supported in front of thehousing 130 for smooth rotation of thefirst drive shaft 10. In addition, thefirst drive shaft 10 has a multi-stepped outer surface for sequential installation of thecounter rotation unit 70, thefront propeller 30, and therear propeller 20 thereon. The first drive shaft includes a flange portion 11 having a firststepped portion 12 where thecounter rotation unit 70 is disposed, and a second steppedportion 13 at the rear of the flange portion 11 for installation of thefront propeller 30, the second stepped portion having a smaller outer diameter than that of the firststepped portion 12. In addition, the first drive shaft includes atapered portion 14 at the rear of the second steppedportion 13 for installation of therear propeller 20, an outer diameter of which is gradually reduced rearward. The flange portion 11 may be integrated with thefirst drive shaft 10, or may be prefabricated and then fixed to an outer surface of thefirst drive shaft 10 via press fitting. - The
rear propeller 20 includes ahub 21 fixed to a tail portion of thefirst drive shaft 10 and a plurality ofblades 22 arranged on an outer surface of thehub 21. Therear propeller 20 is fixed to thefirst drive shaft 10 as an outer surface of thetapered portion 14 of thefirst drive shaft 10 is press-fitted into a center shaft-coupling bore 23 of thehub 21. In addition, the rear propeller is more firmly fixed to thefirst drive shaft 10 as afixing nut 24 is fastened to a rear end of thefirst drive shaft 10. To achieve this coupling, the shaft-coupling bore 23 of thehub 21 may have a shape corresponding to the outer surface of thetapered portion 14 of thefirst drive shaft 10. InFIG. 2 ,reference numeral 25 designates a propeller cap that is mounted to therear propeller hub 21 to cover the rear end of thefirst drive shaft 10 and a rear surface of therear propeller hub 21. - The
front propeller 30 is rotatably coupled to the outer surface of thefirst drive shaft 10 at a position forwardly spaced apart from therear propeller 20. Thefront propeller 30 includes ahub 31 rotatably supported by the outer surface of thefirst drive shaft 10 and a plurality of blades 32 arranged on an outer surface of thehub 31. Thefront propeller 30 and therear propeller 20 are configured to implement counter rotation, and therefore blade angles of the front and rear propellers are opposite to each other. - The
hub 31 of thefront propeller 30 is rotatably supported at the center thereof by aradial bearing 51, and is rotatably supported at both sides thereof by a front thrust bearing 52 and a rear thrust bearing 53 respectively. - The front thrust bearing 52 has an inner race supported by an edge of the second stepped
portion 13 of thefirst drive shaft 10 and an outer race supported by a frontbearing support portion 33 of thehub 31. The rear thrust bearing 53 has an inner race supported by asupport ring 60 so as not to be axially pushed, the support ring being mounted on the outer surface of thefirst drive shaft 10, and an outer race supported by a rearbearing support portion 34 of thehub 31. In this case, theradial bearing 51 serves to bear radial load of thefront propeller 30 applied in a radial direction of thefirst drive shaft 10, and the front andrear thrust bearings first drive shaft 10 in both axial front and rear directions. In particular, the front thrust bearing 52 serves to bear thrust load applied from thefront propeller 30 to the bow during forward movement of the ship, and the rear thrust bearing 53 serves to bear thrust load applied from thefront propeller 30 to the stem during rearward movement of the ship. - The
hub 31 of thefront propeller 30 may be provided with reinforcingmembers bearing support portions members front thrust bearing 52 and the rear thrust bearing 53 increases rigidity of thehub 31. The reinforcingmembers hub 31. In the same manner, a reinforcingmember 43 may further be provided at a front surface of thehub 21 of therear propeller 20 at a portion thereof to come into contact with thesupport ring 60. - Here, after the
front propeller 30 and the rear thrust bearing 53 are mounted to thefirst drive shaft 10, thehub 21 of therear propeller 20 may be coupled to thefirst drive shaft 10 via press fitting, and then thesupport ring 60 may be interposed between therear propeller hub 21 and therear thrust bearing 53. The reason why thesupport ring 60 is installed as described above is because accurately maintaining a distance between the rear thrust bearing 53 and therear propeller hub 21 is difficult due to a coupling error of the rear propeller caused according to circumstances when therear propeller 20 is press-fitted to thefirst drive shaft 10. Accordingly, after therear propeller 20 is first assembled, a distance between the rear thrust bearing 53 and therear propeller hub 21 is measured, and thesupport ring 60 is fabricated to correspond to the distance. In this way, accurate coupling of the support ring and thefirst drive shaft 10 may be achieved. - The
counter rotation unit 70, as exemplarily shown inFIG. 2 , causes counter rotation of thefront propeller 30 and therear propeller 20 based on rotation of thesecond drive shaft 10a which penetrates thetail 3 of thehull 1 and is installed perpendicular to thefirst drive shaft 10. In this case, abearing 138 may be provided between thesecond drive shaft 10a and thehousing 130 surrounding thesecond drive shaft 10a for smooth rotation of thesecond drive shaft 10a. - The
counter rotation unit 70 includes a drivingbevel gear 73 fixed to thesecond drive shaft 10a, a first drivenbevel gear 71 fixed to thefront propeller hub 31, and a second drivenbevel gear 72 fixed to thefirst drive shaft 10. Thecounter rotation unit 70 transmits rotation of the drivingbevel gear 73 to the first drivenbevel gear 71 and the second drivenbevel gear 72, thereby causing counter rotation of thefront propeller 30 and therear propeller 20. - Here, the driving
bevel gear 73, which is fixed to thesecond drive shaft 10a extending perpendicular to thefirst drive shaft 10, is tooth-engaged between the first drivenbevel gear 71 and the second drivenbevel gear 72. - The first driven
bevel gear 71 is secured to thehub 31 as a plurality of fixingbolts 71 a is fastened to the first driven bevel gear in a state in which a rear surface of the first driven bevel gear comes into contact with thefront propeller hub 31. In addition, an inner diameter portion of the first drivenbevel gear 71 is spaced apart from the outer surface of thefirst drive shaft 10 to prevent friction during rotation. AlthoughFIG. 2 shows a coupling method of the first drivenbevel gear 71 using the fixingbolts 71a, the first drivenbevel gear 71 may be welded to thefront propeller hub 31, or may be integrated with thefront propeller hub 31. - The second driven
bevel gear 72 is secured to thefirst drive shaft 10 so as to face the first drivenbevel gear 71 secured to thefront propeller hub 31, and is fixed to the flange portion 11 as a plurality of fixingbolts 72a is fastened to the second driven bevel gear supported by the first steppedportion 12 of the flange portion 11. - The
counter rotation unit 70, as exemplarily shown inFIG. 2 , includes anintermediate bevel gear 74 tooth-engaged between the first drivenbevel gear 71 and the second drivenbevel gear 72. In addition, thecounter rotation unit 70 includes an intermediatebevel gear shaft 75 which extends in a direction crossing thefirst drive shaft 10 to support theintermediate bevel gear 74. Abearing 74a may be provided between theintermediate bevel gear 74 and the intermediatebevel gear shaft 75 supporting theintermediate bevel gear 74 for smooth rotation of theintermediate bevel gear 74. - The above-described
counter rotation unit 70 causes counter rotation of thefront propeller 30 and therear propeller 20 via the plurality ofbevel gears 71 to 74, thus having a smaller volume than that of a typical planetary gear type counter rotation unit. In particular, according to the present embodiment, upon installation of thecounter rotation unit 70, a rear surface of the first drivenbevel gear 71 may face a front surface of thefront propeller hub 31 and rotation centers of the first drivenbevel gear 71 and thehub 31 may coincide with each other, which enables direct connection between the first drivenbevel gear 71 and thefront propeller 30. Accordingly, differently from the related art, it is possible to transmit power to thefront propeller 30 without using an outer shaft. - Moreover, absence of the outer shaft may ensure less friction of the
first drive shaft 10 than the related art, and consequently, ensure a smaller lubrication area than the related art. In addition, absence of the outer shaft may facilitate installation of thefirst drive shaft 10 and center alignment of the shaft after installation thereof. - A typical planetary gear type counter rotation unit includes a sun gear installed to a drive shaft, a planetary gear around the sun gear, and a cylindrical internal gear around the planetary gear, thus having a relatively large volume. In addition, the planetary gear type counter rotation unit should have a very large volume in consideration of a casing around the internal gear because the internal gear located at an outermost position needs to rotate. In addition, it is necessary to use a hollow shaft corresponding to the typical outer shaft for power transmission from the cylindrical internal gear to the front propeller. In conclusion, the related art has difficulty in achieving a simplified configuration and reduced volume as proposed in the present embodiment.
- The propulsion device of the present embodiment, as exemplarily shown in
FIG. 2 , includes afirst sealing unit 90 that seals a gap between a rear surface of thehousing 130 and thefront propeller hub 31 to prevent invasion of saltwater (or fresh water) or foreign substances, and asecond sealing unit 110 that seals a gap between thefront propeller hub 31 and therear propeller hub 21 for the same purpose. - The
first sealing unit 90, as exemplarily shown inFIG. 3 , includes a firstcylindrical lining 91 attached to a front surface of thefront propeller hub 31, and a firstcylindrical sealing member 92 configured to cover an outer surface of thefirst lining 91 so as to come into contact with the outer surface of thefirst lining 91, one end of the first sealingmember 92 being secured to thehull tail 3. - The
first sealing member 92 includes a plurality ofpackings first lining 91 so as to come into contact with an outer surface of thefirst lining 91, and apath 95 configured to supply fluid for sealing into grooves between thepackings path 95 of the first sealingmember 92 may be connected to alubricant supply path 137 defined between thesecond drive shaft 10a ofFIG. 2 and thehousing 130 surrounding thesecond drive shaft 10a through aconnection path 96 to supply lubricant having a predetermined pressure. The lubricant having a predetermined pressure is supplied into the grooves between thepackings respective packings first lining 91 until the packings come into close contact with the first lining, which may prevent invasion of saltwater or foreign substances. - The
first lining 91, as exemplarily shown inFIG. 4 , may include semicircular divided members, i.e. afirst member 91a and asecond member 91b, and thus may be mounted to thefirst drive shaft 10 after thefront propeller 30 is installed to the drive shaft. In addition, a packing 91 d may be provided at a dividedportion 91c of any one of the first andsecond members - A free end of the divided
portion 91c of thefirst member 91 a is provided with afirst coupling portion 91e that protrudes toward the second member, and thesecond member 91b is provided with asecond coupling portion 91f corresponding to the first coupling portion for insertion of the first coupling portion. As afixing bolt 91g is fastened through the first coupling portion and the second coupling portion, strong mutual coupling of the first and second members is accomplished. A plurality of fixing bolts 91i may be fastened to a flange portion 91h fixed to thefront propeller hub 31 to achieve strong fixing of the flange portion with respect to thehub 31. - In the case of the first sealing
member 92, a plurality ofsemicircular rings first drive shaft 10 at the outside of thefirst lining 91 and fixed to one another. In this case, the plurality ofrings - The
second sealing unit 110, as exemplarily shown inFIG. 5 , includes a secondcylindrical lining 111 attached to a front surface of therear propeller hub 21, and a secondcylindrical sealing member 112 configured to cover an outer surface of thesecond lining 111 so as to come into contact with the outer surface of thesecond lining 111, one end of thesecond sealing member 112 being fixed to a rear surface of thefront propeller hub 31. In the same manner as the first sealingmember 92, thesecond sealing member 112 includes a plurality of packings 113a, 113b, and 113c arranged at an inner surface thereof and apath 115 configured to supply fluid into grooves between the packings. - The
path 115 of thesecond sealing member 112 may be connected to alubricant supply path 137 defined between thesecond drive shaft 10a and thehousing 130 surrounding thesecond drive shaft 10a through aconnection path 124. To this end, thefirst drive shaft 10 and thesupport ring 60 may be provided with a firstradial connection path 121 that connects thelubricant supply path 137 to aspace 122 inside thesecond lining 111. The reinforcingmember 42 at the rear surface of thefront propeller hub 31 may be provided with asecond connection path 123 that connects thespace 122 inside thesecond lining 111 to thepath 115 of thesecond sealing member 112. Lubricant for sealing is supplied from the center of thefirst drive shaft 10 to thesecond sealing member 112 to press the packings 113a, 113b, and 113c, which may realize sealing. - Similar to the
first lining 91 and the first sealingmember 92 of thefirst sealing unit 90, thesecond lining 111 and thesecond sealing member 112 have a semicircular shape so as to be coupled to each other after installation of therear propeller 20 and thesupport ring 60. - Next, operation of the propulsion device according to the present embodiment will be described.
- In operation of the propulsion device, if the
second drive shaft 10a is rotated via operation of thedrive source 140, the drivingbevel gear 73 fixed to thesecond drive shaft 10a is rotated in the same direction as that of thesecond drive shaft 10a. Simultaneously, rotation of the drivingbevel gear 73 is transmitted to the first drivenbevel gear 71 secured to thefront propeller hub 31 and the second drivenbevel gear 72 secured to thefirst drive shaft 10. In this case, thefront propeller 30 and therear propeller 20 implement counter rotation via rotation of the first drivenbevel gear 71 and the second drivenbevel gear 72. - The
front propeller 30 and therear propeller 20, which implement counter rotation, have blade angles opposite to each other, and therefore generate propulsive water streams in the same direction. That is, the front and rear propellers generate rearward propulsive water streams during forward movement of the ship, and generate forward propulsive water streams during rearward movement of the ship via counter rotation thereof. In addition, with regard to the propulsive water streams generated during forward movement of the ship, therear propeller 20 acquires propulsive force from rotational energy of fluid having passed through thefront propeller 30 via reverse rotation thereof, which results in enhanced propulsion performance. This is equally applied even during rearward movement of the ship. In addition, thesteering unit 150 may be used to change the direction of propulsive force applied to thehull 1 by thefront propeller 30 and therear propeller 20, which may change a movement direction of the ship. - Meanwhile, the
front propeller 30 generates rearward propulsive water streams during forward movement of the ship, and thus is affected by corresponding repulsive force. This force is transmitted to thefirst drive shaft 10 via thefront thrust bearing 52, thereby serving as propulsive force. Similarly, therear propeller 20 generates rearward propulsive water streams during forward movement of the ship and is affected by repulsive force. This force is similarly transmitted to thefirst drive shaft 10 directly connected to the rear propeller, thereby serving as propulsive force. - During rearward movement of the ship, propulsive force (repulsive force) of the
front propeller 30 is transmitted to thefirst drive shaft 10 via the rear thrust bearing 53, and propulsive force of therear propeller 20 is also transmitted to thefirst drive shaft 10 directly connected to the rear propeller. In conclusion, the propulsion device of the present embodiment allows propulsive force generated via operation of thefront propeller 30 and therear propeller 20 during forward movement and rearward movement of the ship to be wholly transmitted to thehull 1 through thefirst drive shaft 10.
Claims (6)
- A ship propulsion device comprising:a rear propeller (20) fixed to a first drive shaft (10);a front propeller (30) rotatably supported by the first drive shaft (10) in front of the rear propeller (20);a counter rotation unit (70) configured to cause counter rotation of the front propeller (30) and the rear propeller (20) based on rotation of a second drive shaft (10a) which penetrates a hull (1) and is installed perpendicular to the first drive shaft (10); anda housing (130) configured to surround the second drive shaft (10a) and the counter rotation unit (70),wherein the counter rotation unit (70) includes a driving bevel gear (73) fixed to the second drive shaft (10a), and a first driven bevel gear (71)
characterised in that,
the first driven bevel gear (71) is fixed to a hub (31) of the front propeller (30), and a second driven bevel gear (72) is fixed to the first drive shaft (10),
wherein the counter rotation unit (70) transmits rotation of the driving bevel gear (73) to the first driven bevel gear (71) and the second driven bevel gear (72) to cause counter rotation of the front propeller (30) and the rear propeller (20), and
wherein the counter rotation unit (70) further includes an intermediate bevel gear (74) tooth-engaged between the first driven bevel gear (71) and the second driven bevel gear(72). - The device according to claim 1, wherein the counter rotation unit further (70) includes a shaft (75) of an intermediate bevel gear (74), the shaft extending in a direction crossing the first drive shaft (10)to support the intermediate bevel gear(74).
- The device according to claim 2, wherein a bearing (74a) is provided between the intermediate bevel gear (74) and the intermediate bevel gear shaft (75) supporting the intermediate bevel gear (74) for smooth rotation of the intermediate bevel gear (74).
- The device according to any one of claims 1 to 3, further comprising:a first cylindrical lining (91) attached to a front surface of a hub (31) of the front propeller for sealing between the hub of the front propeller and a rear surface of the housing surrounding the second drive shaft; anda first cylindrical sealing member (92) installed to the rear surface of the housing so as to come into contact with an outer surface of the first lining.
- The device according to any one of claims 1 to 3, further comprising:a second cylindrical lining (111) attached to a front surface of a hub of the rear propeller for sealing between the hub of the rear propeller and a hub of the front propeller; anda second cylindrical sealing member (112) installed to a rear surface of the front propeller so as to come into contact with an outer surface of the second lining.
- A ship including a ship propulsion device according to any one of claims 1 to 5.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020110058075A KR101380651B1 (en) | 2011-06-15 | 2011-06-15 | Propulsion apparatus for ship, and ship having the same |
PCT/KR2011/007026 WO2012173307A1 (en) | 2011-06-15 | 2011-09-23 | Propulsion device for ship and ship having same |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2722269A1 EP2722269A1 (en) | 2014-04-23 |
EP2722269A4 EP2722269A4 (en) | 2016-01-13 |
EP2722269B1 true EP2722269B1 (en) | 2017-03-01 |
Family
ID=47357279
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11867726.9A Active EP2722269B1 (en) | 2011-06-15 | 2011-09-23 | Propulsion device for ship and ship having same |
Country Status (6)
Country | Link |
---|---|
US (1) | US20140248153A1 (en) |
EP (1) | EP2722269B1 (en) |
JP (1) | JP5801954B2 (en) |
KR (1) | KR101380651B1 (en) |
CN (1) | CN103796915B (en) |
WO (1) | WO2012173307A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR102424713B1 (en) * | 2020-09-28 | 2022-07-25 | 최순길 | Propusion power increasing device for vessel |
CN113443111A (en) * | 2021-08-17 | 2021-09-28 | 深圳市先行电传动装备有限公司 | Electric outboard motor drive structure |
Family Cites Families (19)
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US2987031A (en) * | 1959-07-24 | 1961-06-06 | Conrad R Odden | Dual propeller propulsion |
US3769930A (en) * | 1971-05-03 | 1973-11-06 | L Pinkerton | Inboard-outboard drive mechanism for boats |
JPS634240Y2 (en) * | 1980-02-25 | 1988-02-02 | ||
JPS5984693A (en) * | 1982-11-02 | 1984-05-16 | Mitsubishi Heavy Ind Ltd | Counter-rotating nozzle propeller |
DE3468389D1 (en) * | 1983-07-18 | 1988-02-11 | Mitsubishi Heavy Ind Ltd | MARINE CONTRA-ROTATING PROPELLER APPARATUS |
JPS6144099A (en) * | 1984-08-08 | 1986-03-03 | Kawasaki Heavy Ind Ltd | Seal structure for marine contrapropeller device |
FI75128C (en) * | 1984-08-22 | 1988-05-09 | Max Gustaf Albert Honkanen | Drive device equipped with counter-rotating propellers. |
JPS61144454A (en) * | 1984-12-17 | 1986-07-02 | Hiromi Kon | Propulsive shaft with built-in power dividing mechanism |
JPS63217968A (en) * | 1987-03-05 | 1988-09-12 | Sumitomo Heavy Ind Ltd | Superconducting driving device with double reverse propeller |
JPS6487996A (en) * | 1987-09-30 | 1989-04-03 | Taisei Corp | Vibrationproof device for underwater pipe |
JPH0187996U (en) * | 1987-12-02 | 1989-06-09 | ||
US5017168A (en) * | 1990-03-12 | 1991-05-21 | Ackley William V | Counter-rotating boat propeller drive |
JPH08207895A (en) * | 1995-02-06 | 1996-08-13 | Ishikawajima Harima Heavy Ind Co Ltd | Steering device for ship |
JPH0930496A (en) * | 1995-07-17 | 1997-02-04 | Ishikawajima Harima Heavy Ind Co Ltd | Bearing device for double reversing propeller shaft |
JP4221493B2 (en) * | 2003-03-26 | 2009-02-12 | 独立行政法人海上技術安全研究所 | Counter-rotating propeller type pod type propulsion device for ships |
JP4294649B2 (en) * | 2006-01-16 | 2009-07-15 | 川崎重工業株式会社 | Counter-rotating propulsion machine |
EP2150459B1 (en) * | 2007-06-01 | 2013-03-13 | Samsung Heavy Ind. Co., Ltd. | Contra-rotating propeller supported on rudder horn of ship |
JP5266543B2 (en) * | 2008-01-09 | 2013-08-21 | ジャパンマリンユナイテッド株式会社 | Counter-rotating propeller marine propulsion device |
KR101313616B1 (en) * | 2011-06-15 | 2013-10-02 | 삼성중공업 주식회사 | Propulsion apparatus for ship, and ship having the same |
-
2011
- 2011-06-15 KR KR1020110058075A patent/KR101380651B1/en active IP Right Grant
- 2011-09-23 CN CN201180072412.0A patent/CN103796915B/en active Active
- 2011-09-23 WO PCT/KR2011/007026 patent/WO2012173307A1/en active Application Filing
- 2011-09-23 US US14/126,381 patent/US20140248153A1/en not_active Abandoned
- 2011-09-23 JP JP2014515703A patent/JP5801954B2/en active Active
- 2011-09-23 EP EP11867726.9A patent/EP2722269B1/en active Active
Non-Patent Citations (1)
Title |
---|
None * |
Also Published As
Publication number | Publication date |
---|---|
EP2722269A1 (en) | 2014-04-23 |
WO2012173307A1 (en) | 2012-12-20 |
KR20120138528A (en) | 2012-12-26 |
CN103796915A (en) | 2014-05-14 |
KR101380651B1 (en) | 2014-04-04 |
JP2014516869A (en) | 2014-07-17 |
CN103796915B (en) | 2017-09-26 |
US20140248153A1 (en) | 2014-09-04 |
JP5801954B2 (en) | 2015-10-28 |
EP2722269A4 (en) | 2016-01-13 |
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