WO2013122113A1

WO2013122113A1 - Rudder device for marine vessel, and marine vessel provided with same

Info

Publication number: WO2013122113A1
Application number: PCT/JP2013/053431
Authority: WO
Inventors: 智宮崎; 佐藤　毅; 小柳　雅人
Original assignee: 三菱重工業株式会社
Priority date: 2012-02-15
Filing date: 2013-02-13
Publication date: 2013-08-22
Also published as: CN104114446B; JP2013166454A; KR20140110075A; CN104114446A; JP5943631B2; KR101648655B1

Abstract

　This rudder device for marine vessel (1) comprises: a rudder horn (3) fixed to the stern of a vessel; a rudder (4) rotatably supported on a shaft that corresponds with the rotation reference line (CL); and bearing bushes (11, 12) that are interposed between the bearing holes (8, 9) of the rudder horn (3) and the rudder shafts (16, 17). The bearing bushes (11, 12) have the outer radial surfaces (26) thereof formed by machining in such a manner that the central axis (25a) of the inner radial hole (25) thereof is in alignment with the rotation reference line (CL).

Description

Ship rudder device and ship equipped with the same

The present invention relates to a rudder device of a ship and a ship equipped with the same.

As disclosed in

Patent Literatures

1 and 2, the rudder of the ship is pivotally supported by a rudder horn fixed to the stern. Specifically, a metal cylindrical liner is fixed to a vertically extending bearing hole formed in the rudder horn by welding or the like, and a resin material is poured into the inner diameter hole of the cylindrical liner and cured to form a bearing bush. The rudder is rotatably attached to the rudder horn around the rudder horn by rotatably inserting the rudder shaft provided on the rudder into the bearing bush. Patent Document 3 discloses that the lower end of the rudder shaft fixed to the rudder horn is fitted and fixed by cooling with liquid nitrogen or the like.

The reason why a metal cylindrical liner is interposed between the bearing hole of the rudder horn and the bearing bush made of resin is that the center line of the bearing hole of the rudder horn is determined on the side of the hull due to the assembly accuracy of the hull. In the case of misalignment in the front, rear, left, and right with respect to the rudder pivot reference line, the positional relationship of the misalignment is precisely measured, and the cylindrical liner is machined in a single state according to this, and the misalignment is corrected. Thus, the inner diameter hole of the cylindrical liner is made eccentric to the outer diameter surface. Thereby, the bearing hole of the rudder horn in fact, that is, the inner diameter hole of the bearing bush is made to coincide with the rudder turning reference line defined on the hull side, the water flow resistance due to the displacement of the rudder position is reduced and accurate steering Performance can be demonstrated.

Japanese Patent Application Laid-Open No. 60-163798 JP 2005-247122 A Japanese Utility Model Application Publication No. 4-90493

By the way, in order to mount the cylindrical liner in the bearing hole of the rudder horn, it is necessary to increase the inner diameter of the bearing hole by the thickness of the cylindrical liner. Since the cylindrical liner is not recognized as a strength member when calculating the strength of the rudder horn, it is necessary to increase the width (thickness) of the rudder horn to secure a predetermined strength by an increase in the inner diameter of the bearing hole. However, if this is done, the width of the rudder horn becomes thicker than the width of the rudder, and a step is formed between the two members, and the water flow separates from the surface of the rudder during navigation, adversely affecting the steering performance. Therefore, the width of the rudder must be increased according to the width of the rudder horn, and by increasing the width of the rudder horn and the rudder in this way, the flow resistance and the weight of the ship increase, and the propulsion performance of the ship Since the fuel efficiency was deteriorated, it was difficult to put the method of Patent Document 1 into practical use in view of strength.

In addition, after fixing the cylindrical liner to the bearing hole of the rudder horn by welding etc., a two-step assembly process is required to press fit the resin bearing bush into the inner diameter hole of this cylindrical liner by cold fitting etc. The construction period was long and the manufacturing cost increased, and maintenance such as anti-corrosion measures around the cylindrical liner of the ship was essential, and the point that the maintenance cost increased was considered as a problem. Furthermore, it is difficult to attach the cylindrical liner to a high-placed rudder horn by welding, and further improvement of the safety of the welder has been desired.

The present invention has been made in view of the above circumstances, and a ship rudder device capable of accurately attaching a rudder to a hull with a simple and durable configuration not using a cylindrical liner, and a ship equipped with the same Intended to provide.

In order to solve the above-mentioned subject, the present invention adopts the following means.
That is, the first aspect of the ship rudder device according to the present invention includes a rudder horn fixed to the stern, a rudder rotatably supported around a pivot reference line, a bearing hole of the rudder horn, and the rudder And a bearing bush interposed between the shafts, wherein the bearing bush is formed by cutting an outer diameter surface thereof so that the central axis of the inner diameter hole coincides with the rotation reference line.

According to the above configuration, when the center line of the bearing hole of the rudder horn is shifted with respect to the rotation reference line defined on the hull side, the center axis of the inner diameter hole of the bearing bush is shifted by the position shift. By cutting the outer diameter surface so as to make it eccentric to the rotation reference line side, instead of the metal cylindrical liner conventionally provided, the displacement of the rudder horn bearing hole is corrected by the bearing bush itself, and the rudder It can be attached correctly to the hull. Therefore, the cylindrical liner can be eliminated.

By eliminating the cylindrical liner, the width (thickness) of the rudder horn and rudder can be reduced by the thickness of the cylindrical liner, reducing the flow resistance and reducing the weight of the vessel during navigation, and promoting the vessel Performance and fuel consumption can be improved. Moreover, there is no need to weld and attach the cylindrical liner to the rudder horn, thereby shortening the construction period of the ship, eliminating welding work at high places, and improving the safety of the worker, and the ship It is possible to reduce the manufacturing cost and improve the maintainability around the rudder axis.

Further, according to a second aspect of the ship rudder device according to the present invention, in the first aspect, the bearing bush hardens a core material in which a flat fiber material is wound in a roll shape a plurality of times. The outer diameter surface is processed into a cylindrical shape so that the laminated center axis of the core material is formed to coincide with the center axis of the inner diameter hole, and the center axis of the outer diameter surface is formed. It is formed to be decentered with respect to the stacking central axis.

According to the above configuration, when cutting the outer diameter surface of the bearing bush, since the inner diameter hole is formed in advance, the fibers of the fiber material are not cut at the inner peripheral surface of the inner diameter hole. Although the end of the cut fiber material is exposed on the outer diameter surface of the bearing bush, the outer diameter surface is pressed into the bearing hole of the rudder horn and does not slide against the inner circumferential surface of the bearing hole, The end of the fiber material will not be rubbed off. Therefore, there is no concern that the end portion of the cut fiber material is exposed on the inner peripheral surface of the inner diameter hole and it is twisted by the rotating rudder shaft and peeled off. Therefore, the decrease in the durability of the bearing bush can be prevented.

Further, according to a third aspect of the ship rudder device according to the present invention, in the first or second aspect, the bearing bush has a rotation restricting means for restricting rotation of the bearing bush inside the bearing hole. .

According to the above configuration, since the bearing bush is prevented from pivoting in the bearing hole of the rudder horn, the axial center position of the rudder can be prevented from being deviated with respect to the hull.

Further, according to a fourth aspect of the ship rudder device according to the present invention, in the third aspect, the rotation restricting means is configured to prevent the bearing bush from being pulled out from the bearing hole in the axial direction. Between the end face of the bearing bush and at least one of the flange members fixed to the opposite end portions of the bearing hole, there is provided an uneven fitting portion which is fitted to each other to restrict the rotation of the bearing bush .

According to the above configuration, the rotation of the bearing bush can be effectively restricted only by subjecting the flange member and the bearing bush which are conventionally used to prevent the removal of the bearing bush, and the bearing bush can be effectively restricted. The low cost configuration allows the rudder to be accurately attached to the hull.

Moreover, the ship according to an aspect of the present invention includes the rudder device according to any one of the first to fourth aspects. Thereby, a rudder can be correctly attached to a hull by simple and highly durable composition which does not use a cylindrical liner.

As described above, according to the rudder device of the ship and the ship provided with the same according to the present invention, the rudder can be accurately attached to the hull by the simple and high-durability configuration without using a cylindrical liner. The width of the rudder horn and the rudder is reduced to reduce the flow resistance and the weight of the vessel during navigation, improve the propulsion performance of the vessel, improve the fuel efficiency, shorten the construction period of the vessel and manufacture cost As a result, the safety of ship manufacturing workers can be further improved, and the maintainability around the rudder axis can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS It is a side view which shows an example of the rudder apparatus of the ship which can apply this invention. It is the longitudinal cross-sectional view which expanded the II section of FIG. FIG. 3 is a cross-sectional view taken along the line III-III of FIG. It is an exploded perspective view showing a state before a bearing bush is fitted in a bearing hole of a rudder horn. It is a top view of bearing bush single-piece | unit. It is a disassembled perspective view of a bearing bush and a flange member which shows the structure of a rotation control means. It is a cross-sectional view of a rudder which shows the effect of the present invention. It is a side view which shows another example of the rudder apparatus of the ship which can apply this invention.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 8.
FIG.1 and FIG.8 is a side view which shows an example of the rudder apparatus 1 of the ship which can apply this invention. In the rudder device 1, a rudder 4 (rudder) is pivotally supported by a rudder horn 3 fixed to the stern of a hull 2 of a ship S by welding. The ladder horn 3 is provided with a pair of upper and

lower projections

5 and 6, and bearing

holes

8 and 9 are formed in the

projections

5 and 6 in the vertical direction, respectively.

The

bearing bushes

11 and 12 are fitted in the

bearing holes

8 and 9, and the

rudder shafts

16 and 17 fixed to the rudder 4 by the

nuts

14 and 15 are inserted into the inner diameter holes of the

bearing bushes

11 and 12, 4 is rotatably supported with respect to the rudder horn 3 (gaugeons 5, 6). The

bearing holes

8 and 9 and the

rudder shafts

16 and 17 need to have their axes aligned with a rotation reference line CL defined on the hull 2 side. The rotation reference line CL is generally a vertical line. The steering shaft 19 fixed to the upper portion of the rudder 4 is turned by a steering device (not shown), whereby the steering of the rudder 4 is performed. In the case where the rudder 4 and the

rudder shafts

16 and 17 fixed to the rudder 4 are integrated, the rudder horn 3 is rotatably supported with respect to the rudder horn 3 as well.

As shown in an enlarged sectional view in FIG. 2, the rudder shaft 17 (16) is taper-fitted to the casing 4 a of the rudder 4 and fastened by the aforementioned nut 15 (14). The rudder shaft 17 (16) is covered with a sleeve 21 formed of a material that improves wear resistance and slidability. Also, the bearing bush 12 (11) fitted in the bearing hole 9 (8) of the gudgeon 6 (5) is press-fitted and fixed to the bearing hole 9 (8) by cold fitting etc. However, the bearing hole 9 (8) In order to prevent removal in the axial direction from the above,

flange members

23 and 24 which are plate members in the shape of a donut disk are fixed by welding, bolting or the like at both ends of the bearing hole 9 (8).

As shown in FIGS. 3 and 4, the

bearing bushes

11 and 12 have an inner diameter hole 25 into which the

rudder shafts

16 and 17 are inserted and an outer diameter surface 26, and the central axis 26 a of the outer diameter surface 26. Are eccentric with respect to the central axis 25 a of the bore 25. The amount of eccentricity E is, for example, the amount of positional deviation when the center line of the bearing holes 8 and 9 of the rudder horn 3 deviates with respect to the rotation reference line CL due to the assembly accuracy of the hull 2. It is set together. That is, the positional relationship between the center lines of the bearing holes 8 and 9 with respect to the rotation reference line CL is precisely measured, and the bearing

bushes

11 and 12 are eccentrically machined in a single state accordingly. The bearing

bushes

11 and 12 are press-fit into the bearing holes 8 and 9 of the rudder horn 3 by cold fitting or the like in a direction in which the displacement is eliminated (cancelled).

As shown in FIG. 5, the bearing

bushes

11 and 12 harden the core material 29 in which a flat fiber material 28 (such as canvas) is wound a plurality of times in a roll shape and laminated, and the outer diameter surface 26 is processed thereon And it has a cylindrical shape. Here, the laminated central axis 29 a of the core member 29, that is, the roll central axis of the fiber material 28 forming the core member 29 is formed to coincide with the central axis 25 a of the inner diameter hole 25. The central axis 26a of the second embodiment is formed to be decentered by an eccentricity E with respect to the laminated central axis 29a. For this reason, the end portion of the fiber material 28 forming the core material 29 is not exposed on the inner peripheral surface of the inner diameter hole 25.

The bearing

bushes

11 and 12 eccentrically processed in this way rotate within the bearing holes 8 and 9 even if they are used for a long time after being pressed into the bearing holes 8 and 9 of the rudder horn 3. Is not allowed. For this reason, as shown in FIG. 6, an uneven fitting portion 30 is provided as a rotation restricting means for restricting the rotation of the bearing

bushes

11 and 12 inside the bearing holes 8 and 9.

The uneven fitting portion 30 is formed, for example, in a notch 31 formed on at least one of upper and lower end faces of the bearing

bushes

11 and 12 and at least one of the

flange members

23 and 24. It is comprised from the projection part 32 closely fitted. Conversely, the notch 31 may be provided on the inner peripheral portion of the

flange members

23 and 24 or the like, and the protrusion 32 may be formed on the end face of the bearing

bush

11 or 12. By fitting the notch 31 and the protrusion 32, the bearing

bushes

11 and 12 are restricted from rotating inside the bearing holes 8 and 9 of the rudder horn 3. As a modification, bolting between the bearing

bushes

11, 12 and the

flange members

23, 24 and securing them to each other is also conceivable.

As described above, this rudder device 1 is press-fitted into the bearing holes 8 and 9 of the rudder horn 3 to center the axial line 26 of the outer diameter surface 26 of the bearing

bushes

11 and 12 for supporting the

rudder shafts

16 and 17 of the rudder 4. Are eccentric to the central axis 25 a of the bore 25. For this reason, when the center lines of the bearing holes 8 and 9 of the rudder horn 3 are deviated with respect to the rotation reference line CL defined on the hull 2 side, the bearing

bushes

11 and 12 are offset by the position deviation. The outer diameter surface 26 may be processed so that the central axis 26 a of the outer diameter surface 26 is eccentric to the central axis 25 a of the inner diameter hole 25. Thus, instead of the metal cylindrical liner conventionally provided, the positional deviation of the bearing holes 8 and 9 of the rudder horn 3 is corrected by the bearing

bushes

11 and 12 themselves, and the rudder 4 is accurately attached to the hull 2 be able to. That is, the rotation reference line CL of the rudder horn 3 becomes the rotation reference line of the rudder 4, and the central axis 25a of the inner diameter hole 25 of the bearing

bushes

11, 12 coincides with the rotation reference line CL.

For this reason, as shown in FIG. 7, the conventionally used cylindrical liner 35 can be eliminated, whereby the width (thickness) W of the rudder horn 3 and the rudder 4 can be increased by the thickness of the cylindrical liner 35. It is possible to make it thinner, reduce the flow resistance at the time of navigation, reduce the weight of the vessel, and improve the propulsion performance and fuel efficiency of the vessel S. Furthermore, the construction period of the ship S can be shortened, the manufacturing cost can be reduced, and the maintainability around the

rudder shafts

16 and 17 can be improved.

Further, the bearing

bushes

11 and 12 are formed into a cylindrical shape by curing the core material 29 in which the flat fiber material 28 is wound in a roll shape a plurality of times and laminated, and the outer diameter surface 26 is processed thereon. The center axis line 29a of the core member 29 is formed to coincide with the center axis ship 25a of the inner diameter hole 25, and the center axis line 26a of the outer diameter surface 26 is formed to be eccentric to the center axis line 29a. There is.

For this reason, when cutting the outer diameter surface 26 of the bearing

bushes

11, 12, the inner diameter hole 25 is formed in advance, and in the inner diameter surface 25, the end of the fiber material 28 cut to the inner peripheral surface is There is no concern that the end portion of the fiber material 28 will be unfolded and peeled off by the

rudder shafts

16 and 17 which are rotated. Therefore, the deterioration of the durability of the bearing

bushes

11, 12 can be prevented. The end of the cut fiber material 28 is exposed at the outer diameter surface 26 of the bearing

bushes

11 and 12, but the outer diameter surface 26 is press-fit into the bearing holes 8 and 9 of the rudder horn 3. Since it does not slide relative to the inner circumferential surface, the end of the fiber material 28 is not rubbed and curled.

Furthermore, since the uneven fitting portion 30 that restricts the bearing

bushes

11 and 12 from rotating inside the bearing holes 8 and 9 is provided, the installation position of the rudder 4 is prevented from being deviated with respect to the hull 2 can do.

The uneven fitting portion 30 is a flange member 23 which is conventionally fixed to both ends of the bearing holes 8 and 9 in order to prevent the bearing

bushes

11 and 12 from being pulled out from the bearing holes 8 and 9 in the axial direction. The projection 32 formed on at least one of the portions 24 and the notch 31 formed on the end faces of the bearing

bushes

11 and 12 are engaged with each other to restrict rotation of the bearing

bushes

11 and 12. Since the

flange members

23, 24 used from the above and the bearing

bushes

11, 12 can be provided only by small processing, the rotation of the bearing

bushes

11, 12 is effectively restricted by a simple and inexpensive configuration. The rudder 4 can be attached to the hull 2 accurately.

According to the rudder device 1 configured as described above and the ship S including the same, the rudder 4 can be accurately attached to the hull 2 by the simple and highly durable configuration that does not use a cylindrical liner. The width of the rudder horn 3 and the rudder 4 is reduced to reduce the flow resistance and the weight of the vessel during navigation, improve the propulsion performance of the vessel S, improve the fuel efficiency, and shorten the construction period of the vessel S Therefore, the manufacturing cost can be reduced, and the maintainability around the

rudder shafts

16 and 17 can be improved to reduce the maintenance cost. Moreover, since the operation of welding and attaching the cylindrical liner to the rudder horn 3 is not necessary, the welding operation at high places can be eliminated to further improve the safety of the operator.

The present invention is not limited to only the configuration of the above embodiment, and modifications and improvements can be made as appropriate without departing from the scope of the present invention, and such modifications and improvements can be made. The form is also included in the scope of the present invention.
For example, although the central axis of the outer diameter surface 26 is parallel to the central axis 25 a of the inner diameter hole 25 of the bearing

bushes

11 and 12 in the above embodiment, depending on the attachment state of the rudder horn 3 to the hull 2, The central axis 26a may be inclined with respect to the central axis 25a.

Reference Signs List 1 rudder device 2 ship 3 rudder horn 4

rudder

5, 6

girdle

8, 9

bearing hole

11, 12 bearing

bush

16, 17

rudder shaft

23, 24 flange member 25 inner diameter hole 25a of bearing bush central axis 26 of outer diameter hole outer diameter surface 26a Center axis 28 of outer diameter surface Fiber material 29 Core material 29a Lamination center axis 30 of core material Concave and convex fitting portion (rotation control means)
31 Notched part 32 Protrusion CL Rotational reference line E Eccentricity S of central axis of inner diameter hole and central axis of outer diameter surface S Vessel

Claims

The rudder horn includes a rudder horn fixed to the stern, a rudder rotatably supported around a pivot reference line, and a bearing bush interposed between a bearing hole of the rudder horn and the rudder shaft, the bearing bush The rudder device of a ship, wherein the outer diameter surface is formed by cutting so that the central axis of the inner diameter hole coincides with the rotation reference line.
The bearing bush is a core material formed by winding a flat fiber material in a roll shape a plurality of times and laminating them and curing the core material, and processing the outer diameter surface on the core material to form a cylindrical shape. The rudder of the vessel according to claim 1, wherein a lamination center axis line is formed to coincide with a center axis line of the inner diameter hole, and a center axis line of the outer diameter surface is formed eccentrically with respect to the lamination center axis line. apparatus.
The ship rudder apparatus according to claim 1 or 2, further comprising a rotation restriction means for restricting the rotation of the bearing bush inside the bearing hole.
In the rotation restricting means, at least one of the flange members fixed to both ends of the bearing hole and the end face of the bearing bush in order to prevent the bearing bush from being pulled out in the axial direction from the bearing hole The ship rudder device according to claim 3, further comprising a concavo-convex fitting portion which is engaged with each other to restrict rotation of the bearing bush.
The ship provided with the rudder apparatus in any one of Claims 1-4.