KR20160053026A - Propulsion apparatus for ship - Google Patents

Propulsion apparatus for ship Download PDF

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Publication number
KR20160053026A
KR20160053026A KR1020140149179A KR20140149179A KR20160053026A KR 20160053026 A KR20160053026 A KR 20160053026A KR 1020140149179 A KR1020140149179 A KR 1020140149179A KR 20140149179 A KR20140149179 A KR 20140149179A KR 20160053026 A KR20160053026 A KR 20160053026A
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KR
South Korea
Prior art keywords
bearing
outer shaft
shaft
lubricating oil
propeller
Prior art date
Application number
KR1020140149179A
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Korean (ko)
Inventor
박문우
Original Assignee
현대중공업 주식회사
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Publication date
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Priority to KR1020140149179A priority Critical patent/KR20160053026A/en
Publication of KR20160053026A publication Critical patent/KR20160053026A/en

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    • 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
    • B63H23/08—Transmitting power from propulsion power plant to propulsive elements with mechanical gearing with provision for reversing drive
    • 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
    • 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

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Sliding-Contact Bearings (AREA)
  • General Details Of Gearings (AREA)

Abstract

A propulsion device for a ship according to an embodiment of the present invention includes: a front bearing disposed between an outer shaft and an inner shaft in front of an inner side of the outer shaft; A rear bearing provided on an inner rear side of the outer shaft between the outer shaft and the inner shaft; And a nozzle portion provided in at least one of the front bearing and the rear bearing and passing through a lubricating oil. The front bearing includes a first outer shaft bearing mounted on an inner circumferential surface of the outer shaft and tapered, and a second outer shaft bearing disposed on an outer circumferential surface of the inner shaft, A second outer shaft bearing tapered corresponding to the first outer shaft bearing and provided coaxially with the first outer shaft bearing, wherein the rear bearing comprises a second outer shaft bearing mounted on an inner circumferential surface of the outer shaft and tapered, And a second inner bearing disposed on an outer circumferential surface of the inner shaft and tapered corresponding to the second outer axial bearing and provided coaxially with the second outer axial bearing, wherein the nozzle portion is penetrated from one side of the first inner bearing The first outer shaft bearing and the second outer shaft bearing, And is pierced through the ring.

Description

[0001] Propulsion apparatus for ship [0002]

The present invention relates to a marine propulsion device.

The propeller is a device for propelling the ship by changing the power of the propulsion engine transmitted through the shaft system to thrust. Ship propellers include screw propellers, jet propellers, paddle cars, and void schneider propellers. Among them, helical propellers are the most popular because they have a relatively high propulsion efficiency, relatively simple structure, and relatively low production costs.

Spiral propellers can be classified by performance, with a fixed pitch propeller (FPP) fixed to a hub connected to a rotating shaft of the propeller wing, and a propeller wing can be moved in a hub connected to the rotary shaft, A controllable pitch propeller (CPP), a contra-rotating propeller that converts the rotational force exiting from the rear propeller to a propeller that rotates in the opposite direction to the rear propeller, propeller (CRP).

In general, a propulsion device for a ship using a double reversing propeller includes an inner shaft connected to a main engine in a hull, a front propeller coupled to a rear end of the inner shaft, a hollow outer shaft provided to rotate on the outer surface of the inner shaft, And a rear propeller coupled to the end portion. At this time, a contra-rotating gear box can be used as a means for rotating the rear propeller in the direction opposite to the rotation direction of the front propeller.

Such a double-inverted propeller is excellent in straightness of the route, low vibration, low noise, and high efficiency because propeller thrust is increased, because the torque unbalance induced by the propeller is reduced and the heeling torque is reduced. In addition, the dual inversion propeller can reduce the EEDI (Energy Efficiency Design Index), which can easily meet the EEDI requirements of the International Maritime Organization (IMO). The following description will be made with reference to the drawings.

1 is a view conceptually showing a conventional marine propulsion device.

1, a conventional marine propulsion device 10 includes an outer shaft 11, an inner shaft 12, a power source 13, and a reverse gear device 14, and the marine propulsion device 10 And a rudder (not shown) is provided at the rear of the ship propulsion unit 10 to adjust the moving direction of the ship.

The conventional marine propulsion device 10 is provided with a reverse gear device 14 (not shown) on the outer shaft 11 such that the outer shaft 11 provided with the front propeller 8 and the inner shaft 12 provided with the rear propeller 9 are opposite to each other, An elastic coupling 15 is provided at a position where the inner shaft 12 and the outer shaft 11 are separated from each other and the outer shaft 11 is connected.

In addition, due to the characteristics of the ship, which is a large structure, the propulsion device for marine vessel 10 must generate propulsive force corresponding to the size and speed of the ship, so that the inner shaft 12 and the outer shaft 11 are each made of a length that is difficult to be integrally formed. At this time, the connecting structure of the inner shaft 12 provided in the outer shaft 11 is difficult to assemble because the portion surrounded by the outer shaft 11 is interfered by the outer shaft 11 and the connecting portion of the inner shaft 12 is connected to the flange (Not shown), there is a disadvantage in that the diameter of the outer shaft 11 must be increased in order to avoid interference between the flange and the outer shaft 11. Therefore, a plurality of inner shafts (not shown) separated by a sleeve coupling 12 are connected.

The propulsion device 10 for a ship has a complicated structure in various points such as a bearing structure, a lubricating structure, a sealing structure, and the like when compared with a uniaxial propeller, Investment costs are increasing, maintenance is not easy, and so on.

In recent years, research and development have been carried out to solve the above-mentioned problems and to enable the application of the double inverted propeller to the ship through the improvement of the mechanical reliability, the minimization of the production maintenance cost and the improvement of the operating economical efficiency.

Such conventional techniques are disclosed in Korean Patent Publication No. 10-1313587 (Feb.

SUMMARY OF THE INVENTION The present invention has been made in order to improve the prior art, and it is an object of the present invention to provide a propulsion device for a ship capable of improving the bearing structure, simplifying the flow of lubricating oil, and improving the propulsive force of the ship.

A propulsion device for a ship according to an embodiment of the present invention includes: a front bearing disposed between an outer shaft and an inner shaft in front of an inner side of the outer shaft; A rear bearing provided on an inner rear side of the outer shaft between the outer shaft and the inner shaft; And a nozzle portion provided in at least one of the front bearing and the rear bearing and passing through a lubricating oil. The front bearing includes a first outer shaft bearing mounted on an inner circumferential surface of the outer shaft and tapered, and a second outer shaft bearing disposed on an outer circumferential surface of the inner shaft, A second outer shaft bearing tapered corresponding to the first outer shaft bearing and provided coaxially with the first outer shaft bearing, wherein the rear bearing comprises a second outer shaft bearing mounted on an inner circumferential surface of the outer shaft and tapered, And a second inner bearing disposed on an outer circumferential surface of the inner shaft and tapered corresponding to the second outer axial bearing and provided coaxially with the second outer axial bearing, wherein the nozzle portion is penetrated from one side of the first inner bearing And a second outer bearing which is penetrated toward the first outer shaft bearing or penetrates from one side of the second inner bearing, Characterized in that the penetrating toward the bearings.

Specifically, at least one of the first outer shaft bearing and the second outer shaft bearing is formed with an inlet and outlet hole through which lubricating oil flows.

Specifically, the lubricating oil flowing through the nozzle portion flows out between the first inner bearing and the first outer bearing by the centrifugal force generated by the rotation of the inner shaft, so that the first inner bearing and the first outer bearing And cooling.

Specifically, the present invention further includes a reversing gear device provided in front of the front bearing and including an LO tank for introducing lubricating oil flowing out between the first bearing bearing and the first bearing, and supplying the lubricating oil to the nozzle portion .

Specifically, each of the front bearing and the rear bearing is formed in a ring shape.

Specifically, the cross-sectional area of the first outer axial bearing decreases as it goes forward, and the sectional area of the second outer axial bearing increases as it goes forward. The cross-sectional area of the first axial bearing increases as it goes forward, The cross-sectional area is decreased.

Specifically, the first outer shaft bearing and the first inner bearing have the same length.

Specifically, the second outer shaft bearing and the second inner bearing have the same length.

Specifically, the nozzle section includes an extension passage extending from the first bearing bearing to the second bearing bearing, whereby the lubricating oil is supplied from the first bearing bearing to the second bearing bearing.

The propulsion device for a ship according to the present invention is provided between an outer shaft and an inner shaft and includes a front bearing and a rear bearing so that a taper can transmit a reaction force from a front to a rear power source side through a bearing structure, , The lubricating oil flowing through the nozzle portion may pass through a space between the front bearing and the rear bearing due to the centrifugal force so that the cooling action can be performed.

1 is a view conceptually showing a conventional marine propulsion device.
2 is a view illustrating a marine propulsion device according to an embodiment of the present invention.
3 is a view illustrating a lubricant system of a propulsion apparatus for a ship according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The objects, particular advantages and novel features of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG. It should be noted that, in the present specification, the reference numerals are added to the constituent elements of the drawings, and the same constituent elements have the same numerical numbers as much as possible even if they are displayed on different drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a view illustrating a propulsion device for a ship according to an embodiment of the present invention, and FIG. 3 is a diagram illustrating a lubricant system of a propulsion device for a ship according to an embodiment of the present invention.

2 and 3, a propulsion apparatus 100 for a marine vessel according to an embodiment of the present invention includes a front propeller 110, a rear propeller 120, an outer shaft 140, an inner shaft 150, 160, a front bearing 170, a rear bearing 180, a nozzle portion 170A, and a reverse gear device 190. [

Hereinafter, the power source 160 side is referred to as a forward side and the rear side of a rear propeller 120 is defined as a rear side, in contrast to a bow and stern of a ship.

The front propeller 110 and the rear propeller 120 are two counter rotating propellers arranged in order in the direction of travel of a hull (not shown) in the same rotational axis, and have diameters equal to each other or any one of diameters, The diameter of the propeller 110 is larger than the diameter of the rear propeller 120 and the front end of the front propeller 110 is bent rearward so that the end portion of the front propeller 110 surrounds the rear propeller 120 It is possible to optimize the blade shape of the propeller to improve the efficiency. Alternatively, the diameter of the rear propeller 120 may be greater than the diameter of the front propeller 110 to fully utilize the turning cone generated by the front propeller 110.

The front propeller 110 may be made of a fixed pitch propeller (FPP) fixed to a hub (not shown) connected to the outer shaft 140, and the rear propeller 120 may include a propeller blade May be made of a controllable pitch propeller (CPP) which is connected to the inner shaft 150 to adjust the pitch angle (inclination of the propeller blade).

The front propeller 110 and the rear propeller 120 are connected to the outer shaft 140 and the inner shaft 150 and are rotated in opposite directions to each other and the fuel is wasted due to the rotational force generated at the wake of the front propeller 110 The rear propeller 120 that rotates in the opposite direction to the front propeller 110 recovers the rotational force exiting from the front propeller 110 to change the propelling force (linear force).

The outer shaft 140 is provided with a front propeller 110 and is rotated in a forward direction by a power source 160. The outer shaft 140 is hollow so that the outer shaft 140 and the inner shaft 150 have the same rotation axis and an inner shaft 150 is provided inside the outer shaft 140. A front propeller 110 ) Can be connected by a hub. A seal 131 may be provided between the outer shaft 140 and the inner shaft 150 to prevent the inflow of seawater.

A rear propeller 120 is provided at the rear of the inner shaft 150 and is rotated in a reverse direction to be opposite to the outer shaft 140 by a reverse gear device 190 to be described later. The inner shaft 150 is provided in the hollow of the outer shaft 140 and has the same rotation axis as the outer shaft 140 and is accommodated in the outer shaft 140 so that the outer shaft 140 is supported by the forward bearing 170 and the rear bearing 180, And is connected to a drive shaft (not shown) of the power source 160 and receives power from the power source 160 and is rotated.

A lubricating oil passage O is formed between the inner and outer shafts 150 and 140 so that the inner and outer shafts 150 and 140 are separated by the lubricating oil so that the respective rotations can be smoothly performed, Both ends of the inner shaft 150 may have a sealing structure to prevent the inflow of seawater.

Here, the lubricating oil may be supplied from the outside of the outer shaft 140 or from the LO tank 194 included in the reverse gear device 190. The LO tank 194 can form the appearance of the reversing gear device 190 and the ring gear 192 inside the reversing gear device 190, the gears of the pinion gear 193, And the lubricating oil circulates between the inner shaft 150 and the outer shaft 140 and flows into the LO tank 194 to facilitate rotation of the front bearings 170 and the rear bearings 180 .

The power source 160 is a main internal combustion engine for driving the outer shaft 140 and the inner shaft 150 and may be a reciprocating engine or an engine for driving various equipments It may be a turbine. The drive shaft of the power source 160 may be connected to the inner shaft 150 by the connection flange 162 and the coupling 163. [ For example, when the power source 160 is an engine, a drive shaft may be connected to a piston (not shown) inside the engine and rotated when the piston reciprocates. Here, a generally used reverse gear device 190 is provided behind the power source 160 so that the outer shaft 140 and the inner shaft 150 are rotated in the reverse direction.

In this embodiment, the inner shaft 150 and the outer shaft 140 are rotatably supported by the front bearing 170 and the rear bearing 180, but can be reversely rotated by the reverse gear device 190, 170 and the rear bearing 180 are provided between the seal 131 and the reverse gear device 190, respectively. The additional bearing structure can be omitted in the present embodiment by supporting the front bearing 170 and the rear bearing 180 on both sides of the inner shaft 150 so as to be spaced from each other between the seal 131 and the reverse gear device 190, The structure can be simplified.

Here, the front bearing 170 and the rear bearing 180 are each provided between the inner shaft 150 and the outer shaft 140, including inner ring and outer ring, in which the inner and outer rings have the same length, As shown in FIG.

Each of the front bearing 170 and the rear bearing 180 supports the outer shaft 140 and the inner shaft and transmits the reaction force of the rear propeller 120 and the front propeller 110 to improve the propulsion force of the ship.

Specifically, the front bearing 170 is provided on the inner front side of the outer shaft 140 between the outer shaft 140 and the inner shaft 150. Here, the front bearing 170 includes a first outer shaft bearing 171 and a first inner bearing 172.

The first outer shaft bearing 171 is installed on the inner circumferential surface of the outer shaft 140 and is tapered, and the sectional area of the first outer shaft bearing 171 may be reduced toward the front. The first inner bearing (172) is installed on the outer peripheral surface of the inner shaft (150), and is tapered corresponding to the first outer shaft bearing (171). And is coaxial with the first outer shaft bearing 171.

The rear bearing 180 is tapered in the opposite direction to the front bearing 170 and is provided on the inner rear side of the outer shaft 140 between the outer shaft 140 and the inner shaft 150. Here, the rear bearing 180 includes a second outer shaft bearing 181 and a second inner shaft bearing 182.

The second outer shaft bearing 181 is installed on the inner circumferential surface of the outer shaft 140 and is tapered, and the second outer shaft bearing 172 can have a larger sectional area as it goes forward. The second inner shaft bearing 182 is installed on the outer circumferential surface of the inner shaft 150 and is tapered corresponding to the second outer shaft bearing 181. The cross sectional area of the second inner shaft bearing 182 can be reduced toward the front side, Axis.

The first and second outer shaft bearings 171 and 181 of the present embodiment constitute an outer ring and the first and second inner shaft bearings 172 and 182 constitute an inner ring and may be provided between the inner shaft 150 and the outer shaft.

Here, the first outer shaft bearing 171 and the second outer shaft bearing 172 are tapered in opposite directions, and the first outer shaft bearing 171 and the second outer shaft bearing 172 are tapered in directions opposite to each other The rear bearing 180 and the front bearing 170 can transmit or receive a reaction force, respectively.

The present embodiment is configured to transmit the reaction force against the thrust generated from the rear of the front propeller 110 or the rear propeller 120 to the power source 160 side in order to improve the propulsive force of the ship, A first outer shaft bearing 171 which advances along an outer shaft 140 pushed forward by the reaction force of the front propeller 110 is provided on the inner side of the first inner shaft bearing 171, The bearing 172 is pushed. At this time, the inner shaft 150 connected to the first inner bearing 172 is pushed forward, and the power source 160 is pushed by the driving shaft connected to the inner shaft 150, This fixed hull is advanced along the power source 160 which is pushed forward.

The second inner shaft bearing 182 and the second inner shaft bearing 182 are connected to each other so that the reaction force against the thrust generated from the rear of the front propeller 110 or the rear propeller 120 can be transmitted to the power source 160, A second inner shaft bearing 182 which advances along an inner shaft 150 pushed forward by the reaction force of the rear propeller 120 is provided on the outer side of the second outer shaft bearing 182 172). At this time, the outer shaft 140 connected to the second outer shaft bearing 172 is pushed forward, and the reaction force of the rear propeller 120 by the carrier 191 of the reverse gear device 190 connected to the outer shaft 140 Is transmitted to the drive shaft of the power source 160 and the thrust bearing 160A so that the hull is pushed forward to generate propulsive force. Here, the carrier 191 is a structure for supporting the pinion gear 193 engaged with the ring gear 192.

In the present embodiment, the cross-sectional area decreases as the first outer shaft bearing 171 moves forward, and as the cross-sectional area increases as the second outer shaft bearing 172 moves forward, the outer shaft 140, A first inner bearing 172 and a second inner bearing 182 at both sides of the outer shaft 140. The first inner bearing 172, Can be inserted and fitted together, so that assembly can be facilitated.

The nozzle portion 170A can penetrate from one side of the first inner bearing 172 and penetrate toward the first outer shaft bearing 171 and penetrate from one side of the second inner bearing 181 to form a second outer bearing 182 As shown in FIG. Here, the nozzle portion 170A may extend from one side of the first inner bearing 172 to the other side toward the hollow portion, and may be provided in one or more along the circumference of the first inner bearing 172.

The first outer shaft bearing 171 and the second outer shaft bearing 181 may be formed with inlet and outlet holes 171A and 181A through which the lubricating oil flows in and out of the first and second outer shaft bearings 171 and 181. The inlet and outlet holes 171A and 181A, The first outer shaft bearing 171 and the second outer shaft bearing 181, respectively. At this time, the inflow / outflow holes 171A and 181A may be provided along at least one circumference of the first outer shaft bearing 171 and the second outer shaft bearing 181.

The lubricating oil flowing through the nozzle portion 170A flows out between the first inner shaft bearing 172 and the first outer shaft bearing 171 by the centrifugal force generated by the rotation of the inner shaft 150, The first outer shaft bearing 172 and the first outer shaft bearing 171 can be easily cooled and rotated.

Particularly, the nozzle unit 170A of the present embodiment is formed so as to penetrate toward the first outer shaft bearing 171 and the second outer shaft bearing 182, so that not only the lubricating oil flowing in by the centrifugal force but also the first inner shaft bearing 172 and the second The lubricating oil can be further flowed through the path passing through the center of the outer shaft bearing 182 and the cooling can be smoothly performed by the amount of the increased lubricating oil.

In this case, a reverse gear device 190 may be provided in front of the front bearing 170. The reverse gear device 190 may include an LO tank 194, and the LO tank 194 may include a first inner bearing The lubricating oil flowing into the space between the first outer shaft bearing 172 and the first outer shaft bearing 171 flows and the lubricating oil can be supplied to the nozzle portion 170A.

An unillustrated reference numeral 160B is a flywheel, and a detailed description thereof will be omitted in a general configuration.

As described above, the present embodiment is provided between the outer shaft 140 and the inner shaft 150, and the tapering member includes the front bearings 170 and the rear bearings 180 so that the tapered bearings can be moved from the front to the rear The thrust can be improved by transmitting the reaction force and the lubricating oil flowing through the nozzle portion 170A can be passed through the front bearing 170 and the rear bearing 180 due to the centrifugal force to perform the cooling action.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the same is by way of illustration and example only and is not to be construed as limiting the present invention. It is obvious that the modification and the modification are possible.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

10, 100: Ship propulsion device 8, 110: Front propeller
9, 120: rear propeller 11, 140: outer shaft
12, 150: inner shaft 13, 160: power source
14: Reverse gear device 15: Elastic coupling
131: Seal 160: Power source
162: connection flange 163: coupling
170: front bearing 170A: nozzle part
171: first outer shaft bearing 171A, 181A:
172: first inner shaft bearing 180: rear bearing
181: Second outer shaft bearing 182: Second inner shaft bearing
190: Reverse gear device 191: Carrier
192: ring gear 193: pinion gear
194: LO tank

Claims (9)

A front bearing provided between the outer shaft and the inner shaft at an inner front side of the outer shaft;
A rear bearing provided on an inner rear side of the outer shaft between the outer shaft and the inner shaft; And
And a nozzle portion provided in at least one of the front bearing and the rear bearing and through which lubricating oil passes,
The front bearing
A first outer shaft bearing mounted on an inner circumferential surface of the outer shaft and tapered and a first inner bearing mounted on an outer circumferential surface of the inner shaft and tapered to correspond to the first outer shaft bearing and coaxial with the first outer shaft bearing; In addition,
The rear bearing
A second outer shaft bearing mounted on an inner circumferential surface of the outer shaft and tapered and a second inner bearing mounted on an outer circumferential surface of the inner shaft and tapered correspondingly to the second outer shaft bearing and coaxial with the second outer shaft bearing; and,
In the nozzle unit,
Wherein the first bearing is pierced through one side of the first bearing bearing and pierced toward the first bearing, or through one side of the second bearing to penetrate the second bearing. The method according to claim 1,
Wherein at least one of the first outer shaft bearing and the second outer shaft bearing is formed with an inlet and outlet hole through which lubricating oil flows. 2. The apparatus according to claim 1, wherein the lubricating oil,
And the first outer bearing and the second outer bearing are caused to flow out between the first inner bearing and the first outer bearing by the centrifugal force generated in accordance with the rotation of the inner shaft to cool the first inner bearing and the first outer bearing. The method of claim 3,
Further comprising a reversing gear device provided in front of the front bearing and including an LO tank into which lubricating oil flowing out between the first bearing bearing and the first bearing axle is introduced and which supplies lubricating oil to the nozzle portion Ship propulsion system. 2. The apparatus of claim 1, wherein each of the front bearing and the rear bearing includes:
And a ring-shaped propelling device. The method according to claim 1,
Wherein the first outer axial bearing is reduced in cross sectional area as it goes forward and the cross sectional area of the second outer axial bearing increases as it goes forward, the sectional area of the first inner axial bearing increases as it goes forward, Is reduced. The method according to claim 1,
Wherein the first outer shaft bearing and the first inner shaft bearing have the same length. The method according to claim 1,
Wherein the second outer shaft bearing and the second inner shaft bearing have the same length. The ink cartridge according to claim 1,
And an extension passage extending from the first bearing bearing to the second bearing bearing, wherein lubricating oil is supplied from the first bearing bearing to the second bearing bearing.
KR1020140149179A 2014-10-30 2014-10-30 Propulsion apparatus for ship KR20160053026A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022097984A1 (en) 2020-11-05 2022-05-12 (주)에스엔이바이오 Method for producing extracellular vesicles derived from three-dimensional spheroid-type cell aggregate
WO2022235088A1 (en) 2021-05-04 2022-11-10 (주)에스엔이바이오 Composition for promoting neuroregeneration, containing extracellular vesicles derived from three-dimensional spheroidal cell aggregates
WO2022235085A1 (en) 2021-05-04 2022-11-10 (주)에스엔이바이오 Composition for promoting angiogenesis comprising extracellular vesicles derived from three-dimensional spheroid-type cell aggregate

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022097984A1 (en) 2020-11-05 2022-05-12 (주)에스엔이바이오 Method for producing extracellular vesicles derived from three-dimensional spheroid-type cell aggregate
WO2022235088A1 (en) 2021-05-04 2022-11-10 (주)에스엔이바이오 Composition for promoting neuroregeneration, containing extracellular vesicles derived from three-dimensional spheroidal cell aggregates
WO2022235085A1 (en) 2021-05-04 2022-11-10 (주)에스엔이바이오 Composition for promoting angiogenesis comprising extracellular vesicles derived from three-dimensional spheroid-type cell aggregate

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