KR20180121426A - Vertical axis impeller blade propulsion device for electric propulsion ship - Google Patents

Abstract

The present invention relates to a vertical shaft impeller blade propulsion apparatus for an electric propulsion vessel which uses an impeller blade having the vertical shaft of rotation to completely isolate a bearing used for a rotary shaft from seawater, and can comprise: a water flow casing in which an inlet and an outlet are formed; at least one impeller motor located on top of the water flow casing; a rotating vertical shaft connected vertically to a lower portion of the at least one impeller motor; the impeller blade attached to the outer circumferential surface of the rotating vertical shaft; a bearing box connected to a lower portion of the rotating vertical shaft and rotating together with the rotating vertical shaft and having a bearing space which is a space in which a lower portion is opened; a fixed vertical shaft fixed to the bottom of the water flow casing and inserted into the bearing space of the bearing box through the lower portion of the bearing box; and the bearing positioned between the bearing box and the fixed vertical shaft.

Description

TECHNICAL FIELD [0001] The present invention relates to a vertical axis impeller blade propulsion device for an electric propulsion vessel,

The present invention relates to a vertical axis impeller blade propulsion device for an electric propulsion ship, and more particularly, to a vertical axis impeller blade propulsion device for an electric propulsion ship which uses an impeller blade having a vertical axis of rotation to completely isolate a bearing used for a rotation axis from seawater To a propulsion device.

The recent enlargement of ships has accelerated the development of propulsion devices such as diesel engines, gas turbines and water jets. In particular, the electric propulsion system is excellent in the adjustment performance by turning in the propelling direction by the rotation of the propeller itself, and has excellent crash stopping ability while maintaining the steering performance. It is expected to become an essential power system for upgrading the ship in the future.

However, the conventional propeller wing is still used as the propeller blades in the electric propulsion ship. However, since the bearing used for the propeller blades can not be completely sealed from the seawater, the leakage lubricating oil Becomes a source of pollution of the sea, shortens the life of the bearing, and causes seawater to flow into the engine room.

A propulsion device for a ship according to an embodiment of the present invention is advantageous in that an electric propulsion line operates the rotation of a propeller by using an electric motor. By using an impeller blade having a vertical axis as the propeller, It is possible to completely isolate the bearing used for the rotary shaft from seawater, thereby preventing seawater pollution caused by the lubricating oil of the bearing, increasing the life of the bearing, and propelling the ship to prevent seawater from flowing into the engine room Device.

Technical objects of the present invention will become apparent from the following description of exemplary embodiments with reference to the attached drawings.

According to an aspect of the present invention, there is provided a propulsion apparatus for a ship, the propulsion apparatus for a ship including: a water flow casing having an inlet and an outlet; At least one impeller motor located on top of the flow casing; A rotating vertical axis connected vertically to the lower portion of the at least one impeller motor; An impeller blade attached to an outer circumferential surface of the rotary vertical axis; A bearing box connected to a lower portion of the rotation vertical axis and rotated together with the rotation vertical axis and having a bearing space which is a space in which a lower portion is opened; A fixed vertical axis fixed to the bottom of the flow casing and inserted into the bearing space of the bearing box through a lower portion of the bearing box; And a bearing positioned between the bearing box and the fixed vertical axis, wherein when the impeller motor rotates the rotary vertical axis and the impeller vane, fluid flows into the inlet of the airstream casing, passes through the impeller vane and is discharged to the outlet of the airstream casing, By the gas present in the space, the fluid entering through the lower part of the bearing box can be blocked from reaching the bearing.

A bearing box gas storage chamber which is positioned below the bearing box and surrounds the fixed vertical axis and in which a bearing box gas space is formed in which an upper portion and a lower portion are opened; And a gas supply part for supplying gas to the bearing box gas space of the bearing box gas storage chamber, wherein the gas supplied by the gas supply part prevents the fluid, which flows into the bearing box gas storage chamber, from reaching the bearing, .

The marine propulsion device may further include a bearing box packing ring that seals between the bearing box gas storage chamber and the fixed vertical axis to block the fluid flowing through the lower portion of the bearing box gas storage chamber.

According to another aspect of the present invention, there is provided a propulsion apparatus for a marine vessel, comprising: a water flow casing having an inlet and an outlet; At least one impeller motor located on top of the flow casing; A rotating vertical axis connected vertically to the lower portion of the at least one impeller motor; An impeller blade attached to an outer circumferential surface of the rotary vertical axis; A motor box fixed to an upper portion of the water flow casing so as to surround the impeller motor, the impeller motor space being a space in which a lower portion is opened; Motor box bearings located between the inner surface of the motor box and the rotary vertical axis; And a motor box gas storage chamber which is located between the lower portion of the motor box and the upper surface of the water flow casing and surrounds the rotation vertical axis and has a motor box gas space which is a space in which the upper portion and the lower portion are opened, By gas, the fluid entering through the lower portion of the motor box gas storage chamber can be blocked from reaching the motor box bearing.

The marine propulsion device may further include a motor box packing ring that seals between the motor box gas storage chamber and the rotation vertical axis to block fluid flowing through the lower portion of the motor box gas storage chamber.

According to another technical aspect of the present invention, there is provided a propulsion apparatus for a ship, comprising: an inlet and an outlet; and the fluid flows into the inlet through the impeller vane, A water flow casing to be discharged; A steering rotary shaft vertically fixed to an upper portion of the water flow casing; A steering motor connected to an upper portion of the steering rotary shaft for rotating the steering rotary shaft; A steering motor box fixed to a lower portion of the ship and having a steering motor installed therein; A steering motor box bearing positioned between an inner surface of the steering motor box and a steering rotary shaft; And a steering motor box gas storage chamber which is located between a lower portion of the steering motor box and the upper surface of the water flow casing and surrounds the steering rotation shaft and has a steering motor box gas space formed therein as an upper and lower open space, By the gas present in the steering motor box gas space, the fluid flowing through the lower portion of the steering motor box gas storage chamber can be blocked from reaching the steering motor box bearing.

The marine propulsion device may further include a steering motor box packing ring that seals between the steering motor box gas storage chamber and the steering rotation shaft to block the fluid flowing through the lower portion of the steering motor box gas storage chamber.

According to another aspect of the present invention, there is provided a propulsion apparatus for a marine vessel, comprising: a water flow casing having an inlet and an outlet formed on a front surface and a rear surface, respectively; At least one impeller motor located on top of the flow casing; A rotating vertical axis connected vertically to the lower portion of the at least one impeller motor; And an impeller blade attached to an outer circumferential surface of the rotation vertical axis. When the impeller motor rotates the rotation vertical axis and the impeller blade, the fluid flows into the inlet of the watercraft casing, passes through the impeller blade and is discharged to the outlet of the watercraft casing, The impeller blade side cover portion covers the impeller blade along the rotation orbit of the impeller blade in a region where the impeller blade rotates from the discharge port toward the inlet port.

The impeller motor may be arranged such that two of the impeller motors are located on the top of the flow casing and the fluid introduced into the inlet of the flow casing is passed between the rotating vertical shafts and discharged to the outlet.

The water flow casing may include a vortex prevention plate positioned between the rotation vertical axes and extending from the inlet to the outlet.

The propulsion device for a ship according to an embodiment of the present invention can completely isolate the bearings used in the vertical rotary shaft of the propeller blade rotated by the electric motor from the seawater and thereby prevent contamination of seawater by the lubricating oil of the bearing And to provide a propulsion device for a ship which can increase the service life of the bearing and prevent the inflow of seawater into the engine room.

However, effects that can be achieved by a propulsion device for a ship according to an embodiment of the present invention are not limited to those mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the following description There will be.

BRIEF DESCRIPTION OF THE DRAWINGS A brief description of each drawing is provided to more fully understand the drawings recited herein.
1 is a perspective view of a propulsion apparatus for a ship according to a first embodiment of the present invention.
2 is a sectional view of the propulsion device for a ship according to the first embodiment of the present invention, viewed from above.
3 is a side sectional view of a marine propulsion device according to a first embodiment of the present invention.
Fig. 4 is a view briefly explaining Boyle's law.
5 is a side sectional view of a marine propulsion unit according to a second embodiment of the present invention.
6 is a view showing a state in which a propulsion device for a ship according to a second embodiment of the present invention is installed on a ship.
7 is a view showing a first modification of the bearing of the propulsion apparatus for a ship according to the second embodiment of the present invention.
8 is a view showing a second modification of the bearing of the propulsion apparatus for a ship according to the second embodiment of the present invention.
9 is a view showing a third modification of the bearing of the propulsion apparatus for a ship according to the second embodiment of the present invention.
10 is a view showing a modified example of a bearing and a bearing box packing ring of a propulsion apparatus for a ship according to a second embodiment of the present invention.
11 is a sectional view of the propulsion device for a ship according to a third embodiment of the present invention, viewed from above.
12 is a perspective view of a propulsion device for a ship according to a third embodiment of the present invention.
Fig. 13 shows a modification of the water flow casing of the propulsion device for a ship according to the third embodiment of the present invention.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It is to be understood, however, that the intention is not to limit the invention to the specific embodiments, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. In addition, numerals (e.g., first, second, etc.) used in the description of the present invention are merely an identifier for distinguishing one component from another.

Also, in this specification, when an element is referred to as being "coupled" or "coupled" with another element, the element may be directly connected or directly coupled with the other element, It should be understood that, unless an opposite substrate is present, it may be connected or coupled via another component in the middle.

In addition, an element represented by '~' in the present specification may be a structure in which two or more elements are combined into one element, or one element may be divided into two or more functions according to a finer function. In addition, each of the components to be described below may additionally perform some or all of the functions of the other components in addition to the main functions of the component itself, and some of the main functions And may be performed entirely by components.

Expressions such as " first, "second," first, "or" second, " as used in various embodiments, Not limited. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be named as the first component.

Hereinafter, exemplary embodiments of the present invention will be described in detail. In this document, the same reference numerals are used for the same constituent elements in the drawings, and redundant explanations for the same constituent elements are omitted.

1 is a perspective view of a propulsion apparatus for a ship according to a first embodiment of the present invention. 2 is a cross-sectional view of a propulsion unit for a ship according to a first embodiment of the present invention. 3 is a side sectional view of a marine propulsion device according to a first embodiment of the present invention. Fig. 4 is a view briefly explaining Boyle's law.

The propulsion device for a ship according to the first embodiment of the present invention includes a water flow casing 10, an impeller motor 20, a rotation vertical axis 21, an impeller blade 22, a bearing box 30, a fixed vertical axis 32, (37).

A fluid inlet 11 is formed in the front surface of the water flow casing 10 and a discharge port 12 of the fluid introduced into the inlet port 11 may be formed on the rear surface. Here, the fluid may be a fluid floating on the ship, and may be, for example, seawater, river, or the like.

The impeller motor 20 may be positioned above the water flow casing 10. One or more impeller motors 20 may be installed, and embodiments in which two impeller motors 20 are installed will be described later.

The rotary vertical axis 21 is vertically connected to the lower portion of the impeller motor 20 and rotated. The impeller blade 22 may be positioned on the outer peripheral surface of the rotary vertical axis 21.

When the impeller motor 20 rotates the rotation vertical axis 21 and the impeller blade 22, the fluid flows into the inlet 11 of the watercraft casing 10, passes through the impeller blade 22, And can be discharged to the discharge port 12.

In order to increase the efficiency of the propulsion device, the water flow casing 10 may include an impeller blade side cover portion 13 on the side of the water flow casing 10 as shown in Figs. The impeller blade side cover portion 13 may have a shape in which the impeller blade 22 is wrapped round the impeller blade 22 along the rotation orbit of the impeller blade 22 in a region where the impeller blade 22 rotates from the discharge port toward the inlet. The impeller blade side cover portion 13 can minimize the reverse thrust generated by the rotation of the impeller blade 22 in the reverse direction. 1 and 2, it is preferable that the inflow area of the inlet 11 is increased toward the front of the flow casing 10.

The bearing box 30 may be connected to a lower portion of the rotation vertical axis 21 and may rotate together with the rotation vertical axis 21 and a bearing space 31 may be formed as a space in which a lower portion is opened.

The fixed vertical axis 32 can be fixed to the bottom of the water flow casing 10 and can be inserted into the bearing space 31 of the bearing box 30 through the lower portion of the bearing box 30.

The bearing 47 may be positioned between the bearing box 30 and the fixed vertical axis 32.

The fixed vertical axis 32 is preferably fixed to the bottom of the watercraft casing 10 so as to be coaxial with a virtual extension axis of the rotary vertical axis 21. The cross sectional shape of the fixed vertical axis 32 is, May have a " T " shape. The bearing 47 may be connected to the upper surface of the fixed vertical axis 32 of the 'T' sectional shape and the inner upper surface of the bearing box 30, and a thrust bearing is preferred. With this structure, when the rotation vertical axis 21 rotates coaxially with the fixed vertical axis 32, the rotation vertical axis 21 can be stably rotated without being shaken to the left or right.

3, when the maximum diameter of the fixed vertical axis 32 having a cross-sectional shape of 'T' is larger than the diameter of the lower entrance of the bearing box 30, the bearing box 30 and the fixed vertical axis 32, It is preferable to form it so that it can be disassembled / assembled into several pieces. Even when the maximum vertical diameter of the fixed vertical axis 32 is large due to such a disassembly / assembling structure, it is possible to finally insert it by disassembling and inserting it into the bearing box 30. Such a disassembly / assembling configuration is also very advantageous for periodic inspection of the apparatus.

In the first embodiment of the present invention, in order to prevent the lubricating oil from flowing out from the rotating vertical shaft 21 and the bearing 30 which must be submerged in fluid (hereinafter, sea water will be exemplified), a bearing box 30) is used. The seawater 2 which can be introduced through the lower part of the bearing box 30 can be prevented from reaching the bearing 37 by the gas existing in the bearing space 31. [

An empty bottle is inserted upside down with the lid open, but if it is inserted vertically, water will not enter the empty bottle even though the lid is open. However, only a small amount of water can be introduced into the bottle inlet by the pressure that the water pressure can give to the air in the bottle. According to Boyle's law of pressure and gas volume, if the water pressure is twice the atmospheric pressure, the water will come to about half way into the empty bottle. One atmospheric pressure corresponds to a pressure of about 10 meters of water depth.

The bearing box 30 may have the same shape as an inverted empty bottle-like container, and a cylindrical inlet surrounding the fixed vertical axis 32 may be formed at a lower portion thereof. When the bearing box 30 is locked in the seawater 2, the seawater 2 can not penetrate deeply into the bearing box 30 but only slightly enters the lower entrance of the bearing box 30. It will only come in proportion to the pressure of the seawater on the bearing space 31 of the bearing box 30. That is to say, the seawater 2 is only slightly inward at the lower entrance of the bearing box 30 by the pressure generated in proportion to the depth of the ship being submerged in the seawater 2, so that the bearing 37 and the seawater 2 It will not contact.

The lubricating oil of the bearing 37 does not flow into the seawater 2 inside the water casing 10 so that the seawater 2 can be prevented from being contaminated and the life of the bearing 37 can be extended .

The lower portion of the rotation vertical axis 21 can be rotatably fixed to the lower portion of the watercraft casing 10 through the bearing box 30 and the fixed vertical axis 32 so that a large impeller blade 22 ) Can be used stably.

The marine propulsion device according to the first embodiment of the present invention may further include a motor box 40 and a motor box bearing 47 and a motor box gas storage chamber 43.

The motor box 40 can be fixed to the upper portion of the water flow casing 10 so as to surround the impeller motor 20 and the impeller motor space 41 is formed inside the motor box 40 .

The motor box bearing 47 is positioned between the inner surface of the motor box 40 and the rotation vertical axis 21 to enable rotation of the rotation vertical axis 21 and the motor box bearing 47 is preferably a radial bearing.

The motor box 40 may have the same shape as an upside-down empty bottle-like container, and a cylindrical inlet surrounding the rotating vertical axis 21 may be formed at a lower portion thereof. When the watercraft casing 10 is locked in the seawater 2 on the same principle as in the bearing box 30, the watercraft 10 is passed through the space between the watercraft casing 10 and the rotary vertical axis 21 The inflow seawater 2 can be prevented from reaching the motor box bearing 47 by the gas existing in the impeller motor space 41. [ Accordingly, the lubricating oil of the motor box bearing 47 can be prevented from flowing into the seawater 2 in the water casing 10, and the service life of the motor box bearing 47 can be extended.

5 is a side sectional view of a marine propulsion unit according to a second embodiment of the present invention.

The propulsion device for a ship according to a second embodiment of the present invention is a configuration in which a gas storage chamber is further added to a propulsion device for a ship according to the first embodiment of the present invention. Therefore, components having the same functions as those described in the first embodiment are denoted by the same reference numerals, and redundant description thereof will be omitted.

The marine propulsion device according to the second embodiment of the present invention may further include a bearing box gas storage chamber 33, a gas supply unit 35, and a bearing box packing ring 36.

The bearing box gas storage chamber 33 is located under the bearing box 30 and surrounds the fixed vertical axis 32 and a bearing box gas space 34 which is a space in which the upper and lower openings are opened can be formed.

The gas supply part 35 can supply gas to the bearing box gas space 34 of the bearing box gas storage chamber 33. The seawater 2 flowing through the lower portion of the bearing box gas storage chamber 33 reaches the bearing 37 by the gas or gas supplied by the gas supply portion 35 existing in the bearing box gas storage chamber 33 Can be blocked.

The gas supply part 35 can supply an inert gas such as helium gas. When the inert gas is filled in the bearing box gas storage chamber 33, the bearings and the internal metals can be prevented from being oxidized.

The bearing box gas storage chamber 33 may be added for the case where it is difficult to block the inflow of the seawater 2 by only the bearing box 30 (for example, when the water pressure is large). In the case of a large ship deeply immersed in the seawater 2, the pressure of the seawater 2 applied to the inside of the bearing box 30 is very high and the seawater 2 enters the bearing 37 at the point where the bearing 37 is installed . 5, the bearing box gas storage chamber 33 may be installed at a lower portion of the bearing box 30, and the bearing box gas space 34 may be formed at a lower position than the volume of the bearing space 31 It is preferable that the magnification is set several times larger. Even when the pressure of the seawater 2 applied to the inside of the bearing box 30 is very high, the pressure of the seawater 2 is increased so that a part of the gas in the bearing box gas space 34 flows into the bearing space 31 , The seawater 2 can not reach the point where the bearing 37 is installed.

For example, when the volume of the bearing box gas space 34 is 10 times larger than the volume of the bearing space 31, the pressure of the seawater 2 applied to the bearing space 31 is 10 times the atmospheric pressure, If the water pressure is not as high as 100 meters, the seawater 2 can not reach the point where the bearing 37 is installed.

The pressure of the seawater 2 on the bearing box gas space 34 in accordance with the depth of the vessel 1 immersed in the seawater 2 by the weight of the vessel 1 and the maximum load weight already exceeds the bearing box gas It is possible to calculate and set the size and the pressure of the bearing box gas storage chamber 33 sufficiently before the installation of the propulsion device according to the present embodiment.

The bearing box packing ring 36 may seal between the bearing box gas storage chamber 33 and the fixed vertical axis 32 to block the seawater 2 flowing through the lower portion of the bearing box gas storage chamber 33. The bearing box packing ring 36 can be pressed by the gas supplied to the bearing box gas space 34 so that the seawater 2 flowing through the lower part of the bearing box gas storage chamber 33 can be pressed against the bearing box packing ring 36. [ The flow can be blocked by the bearing 36 and prevented from reaching the bearing 37.

The marine propulsion device according to the second embodiment of the present invention may further include a motor box gas storage chamber 43, a gas supply unit (not shown), and a motor box packing ring 46.

The motor box gas storage chamber 43 may be positioned between the lower portion of the motor box 40 and the upper surface of the water flow casing 10, And a motor box gas space 44, which is a space in which the upper and lower openings are opened, can be formed.

The gas supply part can supply gas to the motor box gas space 44 of the motor box gas storage chamber 43. The gas supply part can supply an inert gas such as helium gas. When the inert gas is filled in the motor box gas storage chamber 43, the bearings and the internal metals can be prevented from being oxidized.

The seawater 2 which can be introduced through the lower portion of the motor box gas storage chamber 43 through the space between the water flow casing 10 and the rotary vertical axis 21 when the water flow casing 10 is locked in the seawater 2 It can be blocked from reaching the motor box bearing 47 by the gas supplied by the gas or gas supply in the motor box gas space 44. Accordingly, the lubricating oil of the motor box bearing 47 can be prevented from flowing into the seawater 2 in the water casing 10, and the service life of the motor box bearing 47 can be extended.

The motor box packing ring 46 may seal between the motor box gas storage chamber 43 and the rotary vertical axis 21 to block the seawater 2 flowing through the lower portion of the motor box gas storage chamber 43. The motor box packing ring 46 can be pressed by the gas supplied to the motor box gas space 44 so that the seawater 2 flowing through the lower portion of the motor box gas storage chamber 43 can be pressurized, The flow can be blocked by the valve 46 and blocked from reaching the motor box bearing 47.

The advantage of an electric propulsion ship is that the propulsion system itself is capable of turning in a propulsion direction by rotation of the propulsion system, and therefore, the ship has excellent adjustment performance. In order to maximize this advantage, the steering motor 60 that performs the steering function can be installed at the stern of the vessel 1. [ It is necessary to design the lubricating oil of the steering motor box bearing 57 used for the steering rotary shaft 51 not to leak into the seawater 2 as well. The safety of the vessel 1 is absolutely assured by making the steering motor 60, the steering rotary shaft 51 and the steering motor box bearing 57 completely shielded from the seawater 2. To this end, the propulsion device for a ship according to the second embodiment of the present invention includes a steering rotary shaft 51, a steering motor 60, a steering motor box 50, a steering motor box bearing 57, And a box gas storage chamber (53).

The steering rotary shaft 51 can be vertically fixed to the upper portion of the water flow casing 10. When the motor box 40 is formed on the upper portion of the water flow casing 10, it can be fixed to the upper surface of the motor box 40 vertically.

The steering motor 60 is connected to the upper portion of the steering rotary shaft 51 and is capable of rotating the steering rotary shaft 51. The operation of the steering motor 60 causes the watercraft casing 10 to rotate, and the watercraft 10 can be turned by this rotation.

The steering motor box 50 is fixed to a lower portion of the ship 1, and a steering motor 60 can be installed therein. A steering motor space 52, which is a space in which a lower portion is opened, may be formed in the steering motor box 50.

The steering motor box bearing 57 is disposed between the inner surface of the steering motor box 50 and the steering rotary shaft 51 to enable the rotation of the steering rotary shaft 51 and the steering motor box bearing 57, A radial bearing is preferable.

The steering motor box 50 may have the same shape as an inverted empty bottle-like container, and a cylindrical inlet surrounding the steering rotary shaft 51 may be formed at a lower portion thereof. When the watercraft casing 10 is locked in the seawater 2 on the same principle as that of the bearing box 30, the space between the watercraft casing 10 and the steering rotary shaft 51 passes through the space of the steering motor box 50 The seawater 2 which can be introduced through the lower portion can be blocked from reaching the steering motor box bearing 57 by the gas present in the steering motor space 52. [ Thereby, the lubricating oil of the steering motor box bearing 57 can be prevented from flowing into the seawater 2 below the steering motor box 50, and the life of the steering motor box bearing 57 can be extended .

As shown in FIG. 5, a steering motor box gas storage chamber 53 and a gas supply unit (not shown) may further be installed at the lower portion of the steering motor box 50 to more completely prevent seawater penetration.

The steering motor box gas storage chamber 53 has the same function as the bearing box gas storage chamber 33. The steering motor box gas storage chamber 53 is connected to the lower portion of the steering motor box 50 and the water flow casing 10 ), And a steering motor box gas space 54, which is a space in which the upper and lower portions are opened, surrounds the steering rotary shaft 51, can be formed.

The gas supply portion can supply gas to the steering motor box gas space 54 of the steering motor box gas storage chamber 53. The gas supply part can supply an inert gas such as helium gas. When the steering motor box gas storage chamber 53 is filled with the inert gas, the bearings and the internal metals can be prevented from being oxidized.

When the water casing 10 is locked in the seawater 2, the seawater (water) that can flow through the space between the water casing 10 and the steering rotary shaft 51 through the lower portion of the steering motor box gas storage chamber 53 2 can be blocked from reaching the steering motor box bearing 57 by the gas supplied by the gas or gas supply in the steering motor box gas space 54. Thereby, the lubricating oil of the steering motor box bearing 57 can be prevented from flowing into the seawater 2 below the steering motor box 50, and the life of the steering motor box bearing 57 can be extended .

The steering motor box packing ring 56 seals between the steering motor box gas storage chamber 53 and the steering rotary shaft 51 to block the fluid flowing through the lower portion of the steering motor box gas storage chamber 53. The steering motor box packing ring 56 can be pressed by the gas supplied to the steering motor box gas space 54 so that the seawater 2 flowing through the lower portion of the steering motor box gas storage chamber 53 ) Is blocked by the steering motor box packing ring 56 and can be blocked from reaching the steering motor box bearing 57.

In conventional ships, the only area where the interior of a ship is exposed to seawater is the propeller shaft and the steering shaft. However, as shown in FIG. 6, the propulsion device of the present embodiment has a structure in which the steering motor box 50 can be steered even when the steering motor box 50 is completely hermetically attached to the stern portion of the ship 1, thereby enhancing the safety of the ship.

7 is a view showing a first modification of the bearing of the propulsion apparatus for a ship according to the second embodiment of the present invention. 8 is a view showing a second modification of the bearing of the propulsion apparatus for a ship according to the second embodiment of the present invention. 9 is a view showing a third modification of the bearing of the propulsion apparatus for a ship according to the second embodiment of the present invention.

The bearing (37) can be used in various arrangements of thrust bearings and radial bearings to enhance and stabilize the function of the bearing, depending on the ship's expertise and size characteristics.

7, a cylindrical rotary protrusion 38 is formed from the central portion of the inner upper surface of the bearing box 30, and a circular protrusion 38 extending upward from the outer periphery of the disc-shaped plate 32a of the fixed vertical axis 32 of the 'T' An annular fixed projection 39 can be formed. A radial bearing 37a may be provided between the outer peripheral surface of the cylindrical rotary projection 38 and the annular fixed projection 39. [ A thrust bearing 37b may be provided between the lower surface of the cylindrical rotary projection 38 and the upper surface of the disk-shaped plate 32a of the fixed vertical axis 32. [

In FIG. 8, the first disk-shaped plate 32b and the second disk-shaped disk 32c are vertically spaced apart from each other on the fixed vertical axis 32. A thrust bearing 37c may be provided between the inner upper surface of the bearing box 30 and the upper surface of the first disk-shaped plate 32b. A radial bearing 37d may be provided between the outer circumferential surface of the fixed vertical axis 32 between the first disc plate 32b and the second disc plate 32c and the inner circumferential surface of the bearing box 30. [

In FIG. 9, the fixed vertical axis 32 does not have a 'T' cross-sectional shape but may have a cylindrical shape. The fixed vertical axis 32 includes a first fixed vertical axis 32a having a predetermined diameter and a second fixed vertical axis 32b having a diameter larger than the diameter of the first fixed vertical axis 32a, 32b. A thrust bearing 37e may be installed between the inner upper surface of the bearing box 30 and the upper surface of the second fixed vertical axis 32b. The fixed vertical axis of this shape may be easier to assemble and disassemble than the fixed vertical axis of the " T "

10 is a view showing a modified example of a bearing and a bearing box packing ring of a propulsion apparatus for a ship according to a second embodiment of the present invention.

In FIG. 10, the fixed vertical axis 32 does not have a "T" sectional shape but may have a cylindrical shape. The fixed vertical axis 32 includes a first fixed vertical axis 32c having a predetermined diameter and a second fixed vertical axis 32c connected to the lower surface of the first fixed vertical axis 32c and having a diameter larger than the diameter of the first fixed vertical axis 32c And a third fixed vertical axis 32e connected to the lower surface of the second fixed vertical axis 32d and having a larger diameter than the diameter of the second fixed vertical axis 32d.

A thrust bearing 37f may be provided between the inner upper surface of the bearing box 30 and the upper surface of the second fixed vertical axis 32d. The fixed vertical axis of this shape may be easier to assemble and disassemble than the fixed vertical axis of the " T "

An annular plate 30a may be formed on the inner peripheral surface of the bearing box 30 and the bearing box packing ring 36a is positioned on the upper surface of the third fixed vertical axis 32e and the upper surface of the annular plate 30a, A thrust bearing 37g may be positioned between the packing ring 36a and the upper surface of the third fixed vertical axis 32e and between the bearing box packing ring 36a and the upper surface of the annular plate 30a. The bearing box packing ring 36a can be reduced in wear due to the thrust bearing 37g. Under the bearing box packing ring 36a, an additional bearing box gas space 34a may be formed to block contact between the thrust bearing 37g and seawater.

7 to 10 have been described on the basis of the configuration connected to the bearing box 30, the configuration of the modified example is different from that of the configuration connected to the motor box 40 and the configuration connected to the steering motor box 50 In the same manner.

11 is a sectional view of the propulsion device for a ship according to a third embodiment of the present invention, viewed from above. 12 is a perspective view of a propulsion device for a ship according to a third embodiment of the present invention.

The marine propulsion device according to the third embodiment of the present invention may include the air flow casing 110 and the vortex prevention plate 115 provided with two impeller motors. In the description of this embodiment, components having the same functions as those described in the first and second embodiments are denoted by the same reference numerals, and redundant description thereof will be omitted. Further, the present embodiment can equally be applied to the rotating structure described in the first and second embodiments and the fluid infiltration preventing structure for the bearing.

Two impeller motors are positioned on the upper portion of the water flow casing 110. As shown in FIG. 11, the fluid introduced into the inlet port 111 of the water flow casing 110 passes between the rotation vertical shafts 121 The impeller motors can be arranged to be discharged to the discharge port 112. When the impeller motors are arranged side by side and rotated, it is possible to effectively center the propulsion due to the symmetrical shape.

11 and 12, the water flow casing 110 includes the impeller blade side cover portion 113 on both sides of the water flow casing 110 in order to increase the efficiency of the propulsion device as in the first embodiment can do. The impeller blade side cover portion 113 has a shape in which the impeller blade 122 rotates in a direction in which the impeller blade 122 rotates from the discharge port 112 toward the inlet port 111 in such a manner that the impeller blade 122 surrounds the impeller blade 122 along a rotating track of the impeller blade 122 Lt; / RTI > The impeller blade side cover portion 113 can minimize the reverse thrust generated by the rotation of the impeller blade 122 in the reverse direction. 11 and 12, it is preferable that the inflow area of the inlet 111 is gradually increased toward the front of the flow casing 110. [

Generally, in order to increase the rotation speed by the motor, a transmission gear is required. When a transmission gear is used, the energy efficiency is deteriorated. In this embodiment, since the discharge area of the discharge port 112 is gradually reduced toward the rear surface of the flow casing 110, the same effect can be obtained without increasing the rotational speed of the impeller blades 122.

When two impeller blades 122 rotate side by side to collect the seawater to the center of the flow casing 110, a vortex can be generated inside the flow casing 110. The vortex prevention plate 115 may be installed along an imaginary center line of the inlet port 111 and the outlet port 112 of the water flow casing 110. [ The vortex prevention plate 115 may extend over the entire length of the watercraft 10 from the inlet 11 toward the outlet 12 and may extend only for some length.

Motor boxes 140 accommodating an impeller motor may be disposed in parallel on the upper portion of the water flow casing 110.

Fig. 13 shows a modification of the water flow casing of the propulsion device for a ship according to the third embodiment of the present invention.

One motor box 240 accommodating two impeller motors may be formed on the water casing 210.

In order to improve the steering function, a vertical steering vane 225 may be formed in the upper and / or lower portion of the flow casing 210 in the direction of the outlet 212 from the inlet 211. The vertical steering wing 225 can smoothly connect to the curved surface of the impeller blade side cover portion 213 protruding round at both sides of the water flow casing 210 and extend toward the discharge port 212 as shown in Fig. .

The steering rotary shaft 251 having the same function as the steering rotary shaft 51 described in the first and second embodiments may be fixed to the upper portion of the water flow casing 210 or the upper portion of the motor box 240, The steering motor box 250 having the same function as that of the steering motor box 50 described in the first and second embodiments can be rotatably connected to the rotary shaft 251 for the steering.

The reason why conventional ships have not developed a propulsion device having an impeller type rotary shaft is that the conventional internal combustion engine or gas turbine has a vertical axis impeller wing It was impossible to use. In this case, if a vertical axis impeller blade is to be used, the direction of the rotation axis must be changed to a vertical direction, and energy loss is generated in the process.

However, in the case of an electric propulsion vessel that rotates a rotary shaft by an electric motor, it is possible to use a vertical axis impeller blade because the rotation axis of the electric motor is placed horizontally or vertically, and there is no significant difference in terms of energy loss.

However, even if the propeller blades are replaced with vertical impeller blades, it is impossible to prevent the lubricating oil from being used for the upper and lower parts of the vertical rotary shaft which must be submerged in the sea water by the conventional mechanical engineering method. And can cause a larger problem.

However, the ship propulsion device according to the embodiment of the present invention is an electric propulsion ship device having a vertical axis impeller type vane, and it is possible to completely block the contact between the rotary shaft of the propulsion device and the seawater generated in the rotary shaft of the steering device , So that leakage of the bearing lubricating oil can be completely blocked.

This not only eliminates the need to periodically lubricate the engine room as well as extending the lifetime of the propulsion system, but also completely prevents engine room flooding due to incomplete rotor seal sealing at all sterns .

In addition, oil and lubricant can prevent the pollution of the oceans, thus contributing to the protection of the marine environment.

It is expected that the new market will be expanded in the shipbuilding industry, thereby bringing new vitality to the economy both at home and abroad.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, Various modifications and variations are possible.

10, 110, 210: a flow casing
13, 113, 213: impeller blade side cover portion
20: Impeller motor
21, 121: rotation vertical axis
22, 122: impeller blade
30: Bearing box
31: Bearing space
32: fixed vertical axis
33: Bearing box gas storage room
34: Bearing box gas space
35: gas supply section
36: Bearing box packing ring
37: Bearings
40, 140: motor box
41: Impeller motor space
43: Motor box gas storage room
44: Motor box gas space
46: Motor box packing ring
47: Motor box bearing
50: Steering motor box
51: Steering rotary shaft
53: Steering motor box gas storage room
54: Steering motor box gas space
56: Steering motor box packing ring
57: Steering Motor Box Bearing
60: Steering motor
115: vortex prevention plate
225: vertical steering wing

Claims (10)

A water flow casing formed with an inlet and an outlet;
At least one impeller motor located on top of the flow casing;
A rotating vertical axis connected vertically to the lower portion of the at least one impeller motor;
An impeller blade attached to an outer circumferential surface of the rotary vertical axis;
A bearing box connected to a lower portion of the rotation vertical axis and rotated together with the rotation vertical axis and having a bearing space which is a space in which a lower portion is opened;
A fixed vertical axis fixed to the bottom of the flow casing and inserted into the bearing space of the bearing box through a lower portion of the bearing box; And
Wherein when the impeller motor rotates the rotary vertical axis and the impeller blades, the fluid flows into the inlet of the flow casing, passes through the impeller blades, and is discharged to the outlet of the flow casing,
Wherein the gas present in the bearing space blocks the fluid entering through the lower part of the bearing box from reaching the bearing.
The ship propulsion device according to claim 1,
A bearing box gas storage chamber located under the bearing box and surrounding the fixed vertical axis, the bearing box gas space being a space in which upper and lower openings are formed; And
Further comprising a gas supply section for supplying gas to the bearing box gas space of the bearing box gas storage chamber,
Wherein the gas supplied by the gas supply portion is blocked from reaching the bearing, the fluid flowing through the lower portion of the bearing box gas storage chamber.
The marine propulsion device according to claim 2,
Further comprising a bearing box packing ring that seals between the bearing box gas storage chamber and the fixed vertical axis to block fluid flowing through the lower portion of the bearing box gas storage chamber.
A water flow casing formed with an inlet and an outlet;
At least one impeller motor located on top of the flow casing;
A rotating vertical axis connected vertically to the lower portion of the at least one impeller motor;
An impeller blade attached to an outer circumferential surface of the rotary vertical axis;
A motor box fixed to an upper portion of the water flow casing so as to surround the impeller motor, the impeller motor space being a space in which a lower portion is opened;
Motor box bearings located between the inner surface of the motor box and the rotary vertical axis; And
And a motor box gas storage chamber which is located between the lower portion of the motor box and the upper surface of the water flow casing and surrounds the rotation vertical axis and in which a motor box gas space is formed,
Wherein gas present in the motor box gas space is blocked from reaching the motor box bearing through the lower portion of the motor box gas storage chamber.
The marine propulsion device according to claim 4,
Further comprising a motor box packing ring sealing the gap between the motor box gas storage chamber and the rotary vertical axis to block the fluid flowing through the lower portion of the motor box gas storage chamber.
A flow casing formed with an inlet and an outlet, the fluid being introduced into the inlet by the rotation of the impeller blade inside and being discharged to the outlet of the flow casing through the impeller blade;
A steering rotary shaft vertically fixed to an upper portion of the water flow casing;
A steering motor connected to an upper portion of the steering rotary shaft for rotating the steering rotary shaft;
A steering motor box fixed to a lower portion of the ship and having a steering motor installed therein;
A steering motor box bearing positioned between an inner surface of the steering motor box and a steering rotary shaft; And
And a steering motor box gas storage chamber which is located between a lower portion of the steering motor box and the upper surface of the water flow casing and surrounds the steering rotation shaft and has a space for opening the upper and lower portions thereof,
Wherein the gas present in the steering motor box gas space interrupts the fluid entering through the lower portion of the steering motor box gas storage chamber from reaching the steering motor box bearing.
The ship propulsion device according to claim 6,
Further comprising a steering motor box packing ring for sealing the gap between the steering motor box gas storage chamber and the steering rotation shaft to block the fluid flowing through the lower portion of the steering motor box gas storage chamber.
A water flow casing having an inlet and an outlet formed on a front surface and a rear surface, respectively;
At least one impeller motor located on top of the flow casing;
A rotating vertical axis connected vertically to the lower portion of the at least one impeller motor; And
And an impeller blade attached to an outer circumferential surface of the rotary vertical axis,
When the impeller motor rotates the rotary vertical axis and the impeller blades, the fluid flows into the inlet of the flow casing, passes through the impeller blades and is discharged to the outlet of the flow casing,
The water flow casing includes an impeller blade side cover portion on a side surface of the water flow casing,
Wherein the impeller blade side cover portion surrounds the impeller blade along a rotation orbit of the impeller blade in a region where the impeller blade rotates from the discharge port toward the inlet port.
9. The method of claim 8,
Two impeller motors are located on the top of the flow casing,
Wherein the impeller motor is arranged such that the fluid introduced into the inlet of the water casing is passed through the vertical rotation shafts and discharged to the discharge port.
10. The method of claim 9,
Wherein the water flow casing includes a vortex prevention plate positioned between the rotation vertical axis and extending from the inlet to the outlet.

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