KR101313590B1 - Counter-rotating propulsion device and ship having the same - Google Patents

Abstract

An interverting propulsion device and a vessel having the same are disclosed. The mutual inverted propulsion device according to an embodiment of the present invention includes a first propeller coupled to the inner shaft, a second propeller coupled to the outer shaft installed on the outer side of the inner shaft, and an inverted rotation apparatus for inverting and rotating the rotation of the inner shaft to the outer shaft. The reverse rotation device may include a drive gear connected to an inner shaft, a driven gear connected to an outer shaft, one or more inverted gears for inverting and transmitting rotation of the drive gears, and one or more intermittents for connecting or disconnecting power by moving the inverted gears. Iv) including a device, the shaft of the reversing gear having a male thread part, and the intermittent device including a worm wheel fastened to the male thread part, a worm coupled to the worm wheel, and a driving part for rotating the worm. To connect or disconnect power.

Description

Mutual reversal propulsion unit and vessel equipped with it {COUNTER-ROTATING PROPULSION DEVICE AND SHIP HAVING THE SAME}

The present invention relates to a mutual inverted propulsion device and a ship having the same, and more particularly to a mutual inverted propulsion device capable of intermittent power transmission of the two propellers and a ship having the same.

The mutual inversion propulsion device has two propellers on the same axis in opposite directions of rotation. The propulsion efficiency is good as compared with a normal propulsion device having a single propeller, and the propellers can be rotated in opposite directions to maintain a torque balance so that they are widely used as propulsion devices for ships and torpedoes.

U.S. Patent 4,642,059 provides an example of an inverting propulsion device. The propulsion device includes a rear propeller coupled to the inner shaft connected to the engine, a front propeller coupled to the outer shaft installed on the outer surface of the inner shaft, and a reverse rotation device capable of inverting and transmitting the rotation of the inner shaft to the outer shaft.

The reverse rotation device includes a driving bevel gear that rotates with the inner shaft, a driven bevel gear that rotates with the outer shaft, and a plurality of inverted bevel gears that transmit the rotation of the driving bevel gear and change the direction of rotation at the same time. This allows the inner and outer shafts to rotate opposite to each other so that the front propeller and the rear propeller can rotate oppositely.

However, such a reverse reversal propulsion device may cause a situation in which power transmission is impossible on both the inner and outer shafts when the reverse rotation device is broken. If this situation occurred during the operation of the ship, it could cause serious problems such as inoperability.

Embodiments of the present invention to interlock the power transmission of one of the two propeller (斷續) to provide a mutual inverted propulsion device and a ship having the same to enable the propulsion with only one propeller if necessary.

According to an aspect of the invention, the first propeller coupled to the inner shaft, the second propeller coupled to the outer shaft installed on the outer side of the inner shaft, and includes a reverse rotation device for inverting and transmitting the rotation of the inner shaft, The reverse rotation device may include a drive gear connected to the inner shaft, a driven gear connected to the outer shaft, one or more inverted gears for inverting and transmitting rotation of the drive gears, and moving the inverted gears to connect or disconnect power. And at least one intermittent device, the shaft of the inverting gear having a male screw portion, wherein the intermittent device includes a worm wheel fastened to the male screw portion, a worm coupled to the worm wheel, and a driving portion for rotating the worm. Including a mutual inverted propulsion device for connecting or disconnecting power by moving the shaft of the inverted gear in the radial direction of the inner shaft can be provided. The.
The driving gear, the driven gear, and the inverting gear may be bevel gears.
The reverse rotation apparatus may further include a housing accommodating the driving gear, the driven gear, and the inverting gear.
The shaft of the inverted gear may be installed to be movable in the axial direction in the state in which the rotation is limited.
The driving unit may include at least one of a motor and a manual handle.
The shaft of the reversing gear may include a tightening nut which is fastened to the housing by a male screw part of the outer surface thereof, and the interrupting device is fastened to the male screw part by an outer side of the housing.
The control device may include a hydraulic cylinder installed on the outer surface of the housing and moving the shaft of the reverse gear in the axial direction.

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The mutual inverting propulsion device according to an embodiment of the present invention can block power transmission to the outer shaft by operating the intermittent device of the reverse rotation device to separate the inverted gear from the driving and driven gears. Therefore, in the event of a failure of the reverse rotation device during the operation of the ship can be driven by the propulsion of the ship by operating only one propeller by rotating only the inner shaft.

In addition, since the mutual inversion propulsion device according to the embodiment of the present invention includes a clutch device, power transmission to the reverse rotation device can be blocked. Therefore, even when a reverse rotation device malfunctions during operation of the ship, the propulsion of the ship may be enabled by operating only one propeller through the rotation of the inner shaft.

1 is a cross-sectional view showing a state in which the mutual inversion propulsion apparatus according to the first embodiment of the present invention is applied to a ship.
Figure 2 is a cross-sectional view of the reverse rotation device of the mutual inverting propulsion apparatus according to the first embodiment of the present invention, showing a state in which the reverse gear is engaged.
3 is a cross-sectional view of the reverse rotation apparatus of the mutual inverting propulsion apparatus according to the first embodiment of the present invention, showing a state in which the reverse gear is separated.
4 is a cross-sectional view taken along line IV-IV 'of FIG. 3.
5 is a modified example of the reverse rotation apparatus of the mutual inverting propulsion apparatus according to the first embodiment of the present invention, and shows a state in which a manual handle is applied to the control device.
6 is a modified example of the reverse rotation apparatus of the mutual inverting propulsion apparatus according to the first embodiment of the present invention, and shows a state where a hydraulic cylinder is applied as an interruption apparatus.
7 illustrates a modified example of the reverse rotation apparatus of the mutual inverting propulsion apparatus according to the first embodiment of the present invention, and shows a state in which a male screw part and a tightening nut are applied as an interrupting device.
8 is a cross-sectional view of the reverse rotation device of the mutual inverting propulsion device according to the second embodiment of the present invention, and shows a state in which the reverse gears are engaged.
9 is a cross-sectional view of the reverse rotation apparatus of the mutual inverting propulsion apparatus according to the second embodiment of the present invention, showing a state in which the reverse gear is separated.
10 is a cross-sectional view of the mutual inverting propulsion device according to the third embodiment of the present invention.

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

1 to 4 show the mutual inversion driving device according to the first embodiment of the present invention. Referring to Figure 1, the mutual inversion propulsion device 10 may be installed on the rear side of the hull 1 for the propulsion of the ship. Here, the case in which the mutual reversal propulsion device 10 is applied to a ship will be described as an example, but it may be used as a propulsion device of a torpedo, but the application is not limited to the ship.

As shown in FIG. 1, the mutual inverting propulsion device 10 according to the first embodiment includes a hollow shaft installed to rotate on an outer surface of the inner shaft 11 and an inner shaft 11 connected to the engine 2 inside the hull 1. The outer shaft 12 is provided. In addition, the first propeller 13 coupled to the inner shaft 11, the second propeller 14 coupled to the outer shaft 12, and the rotation transmitted to the inner shaft 11 are inverted into the outer shaft to be transferred to the hull 1. It includes a reverse rotation device 20 installed.

The inner shaft 11 has one end connected to the engine 2 inside the hull 1 and the other end penetrating the rear portion of the hull 1 and extending outward to the rear of the hull 1. The outer shaft 12 has one end connected to the reverse rotation device 20 inside the hull 1 and the other end penetrates through the rear part of the hull 1 and extends outward to the rear of the hull 1. The length of the outer shaft 12 exposed behind the hull 1 is shorter than the length of the inner shaft 11. The first propeller 13 is coupled to the rear end of the inner shaft 11, and the second propeller 14 is coupled to the rear end of the outer shaft 12. Accordingly, the first propeller 13 and the second propeller 14 may be disposed on the same axis and may be spaced apart from each other.

This is because the inner shaft 11 and the outer shaft 12 are rotated oppositely by the operation of the reverse rotation device 20 to be described later, the first propeller 13 and the second propeller 14 rotate in opposite directions to generate a driving force. It was made to be possible. In FIG. 1, reference numeral 15 denotes a bearing for rotatably supporting the outer shaft 12, and reference numeral 16 denotes a sealing member for sealing a gap between the outer shaft 12 and the hull 1. In FIG. 1, the inner shaft 11 and the outer shaft 12 each illustrate a state in which one shaft is long in length, but they may have a shape in which a plurality of the inner shaft 11 and the outer shaft 12 are continuously connected by a shaft joint means such as a flange coupling.

As shown in FIG. 2, the reverse rotation apparatus 20 is spaced apart from the drive gear 21 and the drive gear 21 fixed to the outer surface of the inner shaft 11 by the key 24 so as to rotate together with the inner shaft 11. It is disposed on the outer surface of the inner shaft 11 in the correct position and the rotation of the driven gear 22, the drive gear 21 coupled to the outer shaft 12 by a plurality of fixing bolts 25 inverted to the driven gear 22 and transmitted. A plurality of inverted gears 23 interposed between the drive gear 21 and the driven gear 22 so as to be provided.

The drive gear 21, the driven gear 22, and the plurality of inverted gears 23 are all composed of bevel gears, so that they can maintain a mutually bite state. Here, the case where there are a plurality of reverse gears 23 is illustrated, but one reverse gear 23 may be used.

In addition, the reverse rotation apparatus 20 includes a housing 26 for receiving a drive gear 21, a driven gear 22, and a plurality of inverted gears 23. The housing 26 includes a circumferential portion 26a surrounding the outer circumference of the plurality of inverted gears 23, and a first cover portion 26b and a second cover portion 26c respectively covering the openings at both ends of the circumferential portion 26a. It includes. The circumference 26a may be integrally manufactured by casting or the like, or provided in a manner in which a plurality of panels are connected. The first cover portion 26b and the second cover portion 26c may be coupled to both ends of the circumference portion 26a by fastening the bolts 27, respectively. The housing 26 may be firmly fixed by fixing the second cover portion 26c to the hull 1 by fastening the bolt 28.

The shafts 29 supporting the plurality of inverting gears 23 are respectively disposed around the inner shaft 11 in a direction intersecting with the inner shaft 11 and disposed radially about the inner shaft 11. These shafts 29 are supported by the circumference 26a of the housing 26 so that the plurality of inverted gears 23 can be engaged with the drive gear 21 and the driven gear 22. The bearing 30 is interposed between the shaft 29 and the inverting gear 23 of each inverting gear for smooth rotation of the inverting gear 23.

In this configuration, when the drive gear 21 rotates together with the inner shaft 11, the rotation is reversed by the plurality of inverted gears 23 and transferred to the driven gear 22, so that the driven gear 22 is driven by the drive gear 21. Rotation in the reverse direction, so that the outer shaft 12 connected to the driven gear 22 can rotate in the reverse direction of the inner shaft (11). And through this it is to implement the opposite rotation of the first propeller 13 and the second propeller (14).

In addition, as shown in Figs. 2 and 3, the reverse rotation apparatus 20 includes a plurality of intermittent devices capable of connecting or disconnecting power by moving the plurality of inverted gears 23 in their axial directions. 40).

To this end, the shaft 29 of the reversing gear is installed on the circumferential portion 26a of the housing 26 so as to move back and forth by the control device 40 so as to be movable in the axial direction in a restricted state, and the male screw portion is provided on the outer surface thereof. 29a is provided. As shown in FIG. 4, the planar portion 29b may be provided on both side surfaces of the shaft 29 to limit the rotation of the inverted gear shaft 29.

As shown in FIGS. 2 and 4, the control device 40 includes a worm wheel 41 coupled to the male screw portion 29a of the inverting gear shaft 29, a worm 42 coupled to the worm wheel 41, and a worm. A motor 43 for rotating the 42 in the forward or reverse direction, and a case 44 for rotatably supporting the worm wheel 41 and the worm 42 in the state accommodated therein. The case 44 is fixed to the outer surface of the peripheral portion 26a of the housing 26 by fastening the plurality of fixing screws 45. As shown in FIG. 4, the motor 43 is installed outside the case 44, and a shaft thereof is connected to the worm 42 inside the case 44. Such a motor 43 may be a deceleration motor with its own deceleration device.

When the worm 42 is rotated by the operation of the motor 43, the intermittent device 40 rotates the worm wheel 41, the center portion of which is screwed to the male threaded portion 29a of the reversing gear shaft 29. Accordingly, the inverted gear shaft 29 may move from the state of FIG. 2 to the state of FIG. 3, whereby the inverted gear 23 may be separated from the driving gear 21 and the driven gear 22. When the inverted gear 23 is separated, power transmission is interrupted from the drive gear 21 to the driven gear 22, so that the outer shaft 12 does not rotate.

As described above, the mutual inverting propulsion device 20 of the first embodiment may block the power transmission to the outer shaft 12 by operating the control device 40 to separate the inverting gear 23 from the driving and driven gears 21 and 22. have. Therefore, even if a failure of the reverse rotation device 20 during the operation of the ship can be made possible to propel the ship. That is, since the first propeller 13 can be operated by rotating only the inner shaft 11 connected to the engine 2, the ship can be propelled.

5 is a modification of the control device 40. This is a means for rotating the worm 42 is applied to the manual handle 46 instead of the motor. This is to enable the operation of the control device 40 by rotating the manual handle 46 in the forward or reverse direction by hand.

6 is another modified example of the control device. This is the hydraulic cylinder 51 is applied to the control device. This is to allow the hydraulic cylinder 26 installed on the outer surface of the housing 26 to interrupt the power by moving the reversing gear shaft 50 in the longitudinal direction.

7 is another modified example of the control device. This is because the male screw portion 61 on the outer surface of the reverse gear shaft 60 is screwed to the circumferential portion 26a of the housing 26, and the tightening nut 62 is fastened to the male screw portion 61 from the outside of the housing 26. That's the way it is. An end of the inverted gear shaft 60 outside the housing 26 may be provided with a hexagonal or square tool coupling portion 63 to which a fastening tool 64 such as a spanner may be coupled. This is to rotate the inverted gear shaft 60 by using the fastening tool 64 in a state where the tightening nut 62 is loosened when the inverted gear 23 is to be separated from the driving and driven gears 21 and 22. Through the reversing gear shaft 60 through the reversing gear 23 to be moved in the axial direction.

8 and 9 illustrate an apparatus for inverting mutual inversion according to a second embodiment. In the second embodiment, the reverse rotation apparatus 120 applies a planetary gearing method. Except for the reverse rotation device 120 may be configured substantially the same as the first embodiment.

As shown in FIG. 8, the reverse rotation apparatus 120 includes a drive gear 121 connected to the inner shaft 11, a driven gear 122 connected to the outer shaft 12, and rotation of the drive gear 121. And a plurality of inverting gears 123 for inverting and transferring the inverted gears 122 and a plurality of control devices 140 for connecting or disconnecting power by moving the inverting gears 123.

The drive gear 121 is an external gear having teeth provided on its outer circumferential surface, and the driven gear 122 is a cylindrical internal gear 122 positioned outside the drive gear 121. The plurality of inverted gears 123 is an external gear which is interposed between the drive gear 121 and the driven gear 122 and whose shaft 129 is coupled to the rotationally limited carrier 130.

In addition, the reverse rotation apparatus 120 includes a drive gear 121, a driven gear 122, a reverse gear 123, and a housing 126 for receiving the carrier 130. The housing 126 has a cylindrical shape, one end of which is fixed to the hull 1 by a plurality of bolts 128, and a cover part 126b that closes the opposite end of the circumference 126a. It includes. The cover part 126b may be fixed to the circumferential part 126a by fastening the plurality of bolts 127.

The carrier 130 is supported on the inner circumferential portion of the housing 126 so as to be slidable in the longitudinal direction of the inner shaft 11. In addition, the outer peripheral portion thereof is coupled to the guide rail 126c on the inner surface of the housing 126, thereby limiting rotation.

The intermittent device 140 may be installed in the cover part 126b of the housing and may be configured as a hydraulic cylinder capable of moving the carrier 130 in the axial direction of the reverse gear 123. In the hydraulic cylinder, the body 141 is coupled to the outside of the cover 126b, and the retraction rod 142 extending from the body 141 passes through the cover 126b to enter the housing 126 and then the carrier. Coupled to 130.

As shown in FIG. 8, when the driving gear 121 rotates together with the inner shaft 11, the reverse rotation apparatus 120 is inverted by the plurality of inverting gears 123 so that the driven gear 122 is rotated. Is passed to. Therefore, the driven gear 122 may rotate in the reverse direction of the drive gear 121, and the outer shaft 12 connected to the driven gear 122 may rotate in the reverse direction of the inner shaft 11. And through this it is possible to implement the opposite rotation of the first propeller 13 and the second propeller (14).

When the reverse rotation device 120 has a failure, as shown in FIG. 9, the intermittent device 140 moves the carrier 130 to separate the inverted gear 123 from the driving and driven gears 121 and 122. 12) Power transmission to the unit may be interrupted. Therefore, even when a failure of the reverse rotation device 120 during the operation of the ship can be driven by operating only the first propeller 13 through the rotation of the inner shaft (11).

In the second embodiment, the control device 140 for separating the inverted gear 123 from the driving gear 121 and the driven gear 122 is illustrated in FIGS. 2 and 4 of the first embodiment, in addition to the hydraulic cylinder mentioned above. It may be replaced by a worm gear method as shown. That is, in FIG. 8, the retracting rod 142 of the hydraulic cylinder may be replaced by a screw shaft protruding out of the cover part 126b of the housing 126 in a state of being coupled to the carrier 130, and the cover part 126b. The outer side of the worm wheel fastened to the screw shaft, the worm coupled to the worm wheel, it will be possible to install a motor for rotating the worm. In addition, the motor for rotating the worm may be replaced by a manual handle as in the example of FIG. 5.

Such an interruption device may be configured substantially the same as the first embodiment except that there is a difference in moving the carrier 130, and each configuration is described in detail in the first embodiment, and thus description thereof will be omitted. Shall be.

10 shows a mutual inverting propulsion device according to a third embodiment. In the third embodiment, the reverse rotation device 220 drives the rotation of the drive gear 221 rotatably installed on the outer side of the inner shaft 11, the driven gear 222 connected to the outer shaft 12, and the drive gear 221. A plurality of inverted gears 223 for inverting and transmitting the gears 222 are provided.

The drive gear 221, the driven gear 222, and the plurality of inverted gears 223 are all made of bevel gears, and a housing 226 is provided outside to accommodate these gears. In this respect, it is similar to the first embodiment. However, in the reverse rotation apparatus 220 of the third embodiment, the shaft 229 of the inverted gear is fixed to the circumferential portion 226a of the housing 226 and the driving gear 221 is not directly connected to the inner shaft 11. There is a difference from the first embodiment. In addition, the third embodiment includes a clutch device 270 that can transmit or block rotation of the inner shaft 11 to the inverting gear device 220.

 The clutch device 270 is coupled to the outer surface of the inner shaft 11 in a spline or serration manner to move in the longitudinal direction of the inner shaft 11 and to rotate together with the inner shaft 11, the first friction disk 271 and the first one. A second friction disk 272 connected to the drive gear 221 to face the friction disk 271, and a hydraulic cylinder drive unit 273 for advancing and retracting the first friction disk 271 in the axial direction.

In the clutch device 270, the driving unit 273 moves the first friction disk 271 to contact the second friction disk 272 so that the rotation of the inner shaft 11 causes the drive gear of the reverse rotation device 220 ( 221). In addition, the driving unit 273 may move the first friction disk 271 in the reverse direction to separate the second friction disk 272 from the second friction disk 272 to block power transmission to the driving gear 221.

Therefore, in the mutual inversion propulsion device of the third embodiment, the clutch device 270 may connect power to the reverse rotation device 220 so that the opposite rotation of the inner shaft 11 and the outer shaft 12 may be performed. That is, the opposite rotation of the first propeller 13 and the second propeller 14 may be realized.

In addition, when a malfunction of the reverse rotation device 220 occurs during the operation of the ship, the clutch device 270 may block power transmission to the reverse rotation device 220. Therefore, in this case, the propulsion may be enabled by operating only the first propeller 13 through the rotation of the inner shaft 11.

10 illustrates only the case where the friction disk method is applied to the clutch device, but the shape of the clutch device is not limited thereto. The clutch device may be of a type capable of intermittent the power transmitted from the inner shaft 11 to the reverse rotation device 220. For example, various methods may be applied, such as an electronic clutch, a wet multi-plate clutch, a tooth clutch of a two-pinch type.

1: hull, 10: reversal propulsion system,
11: internal axis, 12: external axis,
13: first propeller, 14: second propeller,
20: reverse rotation device, 21: drive gear,
22: driven gear, 23: inverted gear,
40: interlock, 270: clutch.

Claims (15)

A first propeller coupled to an inner shaft, a second propeller coupled to an outer shaft installed outside of the inner shaft, and an inverted rotation device that inverts and rotates the rotation of the inner shaft to the outer shaft,
The reverse rotation device may include a drive gear connected to the inner shaft, a driven gear connected to the outer shaft, one or more inverted gears for inverting and transmitting rotation of the drive gears, and moving the inverted gears to connect or disconnect power. One or more intermittent devices,
A shaft of the inverted gear includes a male screw portion, and the control device includes a worm wheel coupled to the male screw portion, a worm coupled to the worm wheel, and a driving portion for rotating the worm. Reversal propulsion device to connect or disconnect power by moving to. The method of claim 1,
The driving gear, the driven gear, and the inverting gear are bevel gears. 3. The method of claim 2,
The reverse rotation device further comprises a housing for receiving the drive gear, the driven gear, the inverted gear. The method of claim 3,
And the shaft of the inverted gear is installed to be movable in the axial direction in a limited rotation of the housing. The method of claim 1,
The driving unit is a mutual reverse propulsion device comprising at least one of a motor and a manual handle. The method of claim 3,
The shaft of the inverted gear is fastened to the housing by a male thread on its outer surface.
The intermittent device includes a tightening nut which is fastened to the male screw part outside the housing. The method of claim 3,
The interrupting device is installed on the outer surface of the mutual reverse propulsion device including a hydraulic cylinder for moving the axis of the reverse gear in the axial direction. delete delete delete delete delete delete delete Ship provided with the mutual inversion propulsion device according to any one of claims 1 to 7.

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