KR20100033191A - Rudder trunk assembly separated rudder carrier - Google Patents

Abstract

PURPOSE: A rudder trunk assembly with a separate rudder carrier is provided to increase welding tolerance when welding a rudder trunk to a hull and thus enable efficient and accurate installation of a rudder carrier. CONSTITUTION: A rudder trunk assembly comprises a rudder trunk(4), a rudder carrier(5), and a neck bearing(6). The rudder trunk encloses a rudder stock(3) which transfers the torque of a steering gear(1) to a rudder blade(2). A box structure(8) having an internal space is installed on the upper side of the rudder trunk, in contact with a steering gear deck(7). The rudder carrier is installed separate from the rudder trunk on the upper side of the box structure.

Description

Rudder trunk assembly separated rudder carrier

The present invention relates to a rudder carrier separation type rudder trunk assembly having a space portion formed thereon, and more particularly, by welding the rudder trunk to a hull without installing a rudder carrier inserted into the rudder trunk to support rotation of the rudder stock. The present invention relates to shortening the welding process by forming a separate space on the upper part of the rudder trunk and to coping with deformation of the rudder trunk due to the welding operation.

The ship has a rudder at the stern for its steering. Specifically, the rudder is assembled with a lower rudder blade in contact with the propeller wake and a rudder stock, which is a shaft coupled to transmit rotational power to the rudder blade, and an upper portion of the rudder stock to transmit rotational power to the rudder stock. It is composed of a tiller, that is, a steering gear.

At this time, a rudder trunk is installed to surround the rudder stock in order to prevent seawater from submerging in the joint of the lower rudder blade and the upper hull and to support the load acting on the rudder blade. . In addition, inside the rudder trunk, a bearing, ie, a lower neck bearing and a rudder carrier, is installed between the rudder stock and the rudder stock to support rotation of the rudder stock.

Specifically, the structure in which the conventional rudder trunk is assembled will be described.

4 is an exemplary view showing a stern portion in which a shovel (spade) type rudder is installed in a conventional integrated rudder trunk, and FIG. 5 is a sectional view in which the rudder trunk is assembled, and FIG. 6 is an enlarged view of the rudder carrier inserted in the upper part of the rudder trunk. It is a cross section.

As shown, the conventional rudder trunk is equipped with a rudder stock on the rudder trunk, which is integrally extended to the steering gear deck, and the rudder trunk structure has a neck bearing at the bottom for the rudder stock to support the rudder stock. It can be seen that the insert is installed.

It can also be seen that a stalk supporting the rudder trunk and a rudder trunk web for welding the rudder trunk with the hull are formed by welding the stalk.

However, in the conventional rudder trunk and its assembly structure, after the rudder trunk and the rudder carrier and the neck bearing inserted into the rudder trunk are processed and supplied integrally, the rudder trunk is welded to the hull in the state where the rudder carrier is removed. Due to the structure of the rudder carrier, when the rudder trunk is assembled to the hull, the circumference of the rudder trunk is welded and deformed due to the welding heat, so that the rudder carrier inserted into the rudder trunk is not assembled well. do. That is, the assembly tolerance of the rudder trunk and the rudder carrier should be + 1mm per side and the total tolerance should be + 2mm. However, it is difficult to satisfy this tolerance range when the rudder trunk is deformed by welding. It takes

In order to prevent the latter work as described above, it is necessary to precisely measure the roundness of the rudder trunk during welding. Due to such precision work, there is a problem that the hull assembly process having a fast working process is delayed as a whole. Moreover, when welding the rudder trunk and assembling the rudder carrier, when the entire ship's block is assembled, it is necessary to keep in mind the vertical horizontal with other blocks.

In more detail, the problems of using the rudder trunk and the rudder carrier, which are prefabricated and provided as an integrated unit, will be described below.

Since the rudder carrier is inserted into the rudder trunk and is integrally formed, it is possible to disassemble the steering gear during repair of the rudder carrier bearing (BEARING), so there is a problem that a dry docking operation is required.

In addition, in terms of welding quality control, there is a problem that the welding period is excessively required because the welding quality control is strictly required for each welding step in order to install the rudder carrier.

In addition, the problem when installing the rudder carrier has a problem that it is necessary to adjust precisely because it is installed directly inside the rudder trunk.

In addition, since the rudder trunk web (Rudder TRUNK WEB) is supplied from the company to the minimum range when welding the rudder trunk web, the welding amount corresponding to the hull web (WEB) has to be divided, which causes an excessive amount of welding. In other words, the web area is not basically small, and the shipyard needs to supply additional hull connecting webs, which causes excessive weld volume.

Also, the baseline for cone coupling of rudder blade and rudder stock is displayed on the surface of rudder boss without precise consideration of rudder blade shape after rudder boss hole and rudder stock surface inspection. There is a problem that greatly occurs.

SUMMARY OF THE INVENTION An object of the present invention for solving the above problems is to provide a rudder trunk assembly having a structure that can increase the rudder carrier tolerance when welding the rudder trunk to the hull to efficiently install the rudder carrier and improve the installation degree There is.

A specific object of the present invention is to form a box-shaped space on the top of the rudder trunk when the rudder trunk is welded to the hull, to assemble the rudder carrier on the top of the space to efficiently install the rudder carrier and improve the installation accuracy It is to provide a rudder trunk assembly.

Another object of the present invention is to form a box-shaped space on the top of the rudder trunk when the rudder trunk is welded to the hull, and when the rudder trunk is welded to the hull, the rudder carrier in the state of adjusting the position to the ladder choke according to the weld deformation state It is to provide a rudder trunk assembly having a structure that can be assembled on the upper portion of the box-shaped space to efficiently install the rudder carrier and improve the degree of installation.

Another object of the present invention is to provide a rudder trunk assembly having a structure in which the rudder trunk web is integrally blocked with the hull structure to reduce the welding amount to reduce the weld deformation of the rudder trunk.

The present invention to achieve the object as described above and to perform a problem for eliminating the conventional defects by installing a box-shaped structure having a space on the top of the cylindrical rudder trunk surrounding the rudder stock for transmitting the rotational force of the steering gear to the rudder blade It is achieved by providing a rudder carrier separate rudder trunk assembly, which is configured to be in contact with the steering gear deck and to support the rudder stock by installing a rudder carrier separated from the rudder trunk on the box-shaped structure.

After the centering and alignment of the rudder stock, the box-shaped structure and the rudder carrier are bolted using a bolt and a nut according to the angled bolt hole, and the tolerance according to the height is adjusted by resin choking or steel liner. It is characterized by a combination.

The rudder skeg formed on the rudder trunk is characterized by having a thick iron plate disposed on the outer plate and integrally extending from the bottom of the rudder trunk connection to the steering gear deck.

The web formed in the rudder trunk is welded to the skeg to have a continuous structure integral with the hull structure.

The bottom of the box-shaped structure of the upper part of the rudder trunk is characterized in that the seawater intrusion prevention sealing device is installed to prevent the inflow of seawater to the top.

The present invention is composed of a separate structure having a box-shaped structure on the top of the rudder trunk can be repaired alone in the space of the box structure without disassembly of the steering gear when repairing the rudder carrier bearing, and does not require dry docking (DRY-DOCKING),

The advantage that the rudder blade is twisted spade type and there is no gap can prevent cavitation erosion,

When welding the rudder trunk, the welding quality control is not the precise welding but the welding accuracy standard of the general block is sufficient, so the air shortening of the block assembly is possible.

When the rudder carrier is installed, the rudder carrier is installed at the top of the box structure formed on the upper part of the rudder trunk by resin choking or steel liner according to the centering marking of the rudder stock after welding deformation due to the welding of the rudder trunk. With the advantage that this is possible,

When welding the rudder trunk web, the rudder trunk web (Rudder Trunk WEB) can be blocked in one piece with the hull structure.

Since the baseline marking for the cone coupling of the rudder blade and the rudder stock is displayed on the rudder boss from the time of assembling the rudder inner material, it is possible to accurately display the overall baseline of the rudder blade, and to assemble the rudder on the rudder trunk, It is a useful invention with the advantage of being able to match precisely and is an invention which is highly expected to be used in industry.

Hereinafter, the configuration and the operation of the embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

1 is an exemplary view showing a stern portion in which a rudder is installed on a rudder trunk having a box structure formed thereon according to the present invention, FIG. 2 is a cross-sectional view of the rudder trunk assembled according to the present invention, and FIG. 3 is a rudder according to the present invention. This is an enlarged sectional view showing the rudder carrier separately installed on the trunk.

As shown, the present invention is installed in the rudder trunk and cylindrical rudder trunk (4) surrounding the rudder stock (3) for transmitting the rotational force of the steering gear (1) to the rudder blade (2) to support the reaction force of the rudder stock The rudder carrier 5 and the neck bearing 6 inserted in the lower part are installed as a basic configuration.

Specifically, in the rudder trunk 4 of the present invention, unlike the cylindrical rudder trunk of the spade-type rudder extends to the steering gear deck 7, the box-shaped structure 8 having a space part is installed on the rudder trunk 4. The box structure 8 is configured in contact with the steering gear deck 7. More specifically, the box-shaped structure 8 has a front, rear, left and right space, that is, a front and rear has a vertical structure and a frame structure of semi-circular structure on the left and right.

In addition, unlike the general rudder carrier 5 is inserted into the rudder trunk 4 and assembled in one piece, the box-shaped structure 8 is separated from the rudder trunk 4 at a predetermined interval.

As described above, when a certain space is secured by the box-shaped structure on the upper part of the cylindrical rudder trunk, the operator can access the lower part of the steering deck, and the worker enters the space formed by the box-shaped structure to perform maintenance work on the rudder carrier bearing and the rudder stock. do.

Coupling between the box-shaped structure 8 and the rudder carrier 5 is performed by welding the rudder trunk to the hull and, if welding deformation occurs, according to the rudder stock centering marking, after drilling on the hull and drilling the bolt hole, adjust the height accordingly. In case of resin choking (RESIN CHOCKING) 12, the bolt 14 is inserted in the lower direction and loosely coupled to the nut 13 on the upper part by gaboling. After that, when the resin hardens, tighten the nut completely.

That is, after welding deformation is completed, centering and alignment of the rudder stock is carried out, and the foundation bolt position marking for the installation of the rudder carrier bearing is performed according to the centering and alignment result of the rudder stock, and then the hole is installed and the height position tolerance when installing the rudder carrier Is absorbed and adjusted using resin choking.

In addition, by placing a thick iron plate on the outer surface of the rudder skeg (9) formed on the rudder trunk of the present invention to extend from the bottom of the rudder trunk connection to the steering gear deck (7) integrally configured to have a structural stability. The extended shape is installed so as to have a structural stability to the load so that the gap is widened from the bottom to the top.

In addition, the web 10 formed in the rudder trunk was welded to have a structure that continuously connects the hull structure. That is, by welding the web 10 with the skeg 9, the rudder trunk web is integrally blocked with the hull structure according to the continuous structure, thereby reducing the amount of welding. Reduced weld volume minimizes weld deformation in the rudder trunk.

In addition, the bottom of the box-shaped structure in the upper part of the rudder trunk was sealed by installing an additional seawater intrusion prevention sealing device (or rudder trunk lubricating rust preventive sealing device) (11) to prevent sea water from entering the top.

Referring to the assembly method of the rudder trunk of the present invention having the structure as described above is as follows.

First, a space is formed by installing a box structure under the steering gear deck into which the rudder trunk is to be inserted.

After installing the rudder skeg integrally extended to the steering gear deck (7), after welding the web of the rudder trunk to the skeg to be integrated, the rudder trunk is inserted into the bottom of the box-shaped rudder trunk structure and assembled to the hull by welding.

After that, centering and alignment of the rudder stock is performed based on the internal diameter of the neck bearing pre-assembled in the bottom of the rudder trunk.

After that, mark the foundation bolt position for the rudder carrier installation and construct the hole.

The rudder stock is then inserted into the rudder trunk.

Later, the chokering of the resin or steel liner is performed to adjust the rudder carrier height and position tolerance.

After installation, bolt the rudder carrier to fix it.

Then install a tiller and steering gear on top of the rudder stock.

The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention claimed in the claims. Of course, such changes will fall within the scope of the claims.

1 is an exemplary view showing a stern portion in which a rudder is installed on a rudder trunk in which a box structure is formed in accordance with the present invention;

2 is a cross-sectional view of the rudder trunk assembled according to the present invention,

3 is an enlarged cross-sectional view showing a rudder carrier separately installed on the rudder trunk according to the present invention;

Figure 4 is an exemplary view showing a stern portion of the conventional integrated rudder trunk is installed on the rudder,

5 is a cross-sectional view of a conventional rudder trunk assembled;

Figure 6 is an enlarged cross-sectional view showing a rudder carrier inserted in the upper part of the rudder trunk.

<Description of the symbols for the main parts of the drawings>

(1): steering gear (or tiller) (2): rudder blade

(3): rudder stock (4): rudder trunk

(5): rudder carrier (6): neck bearing

(7): steering gear deck (8): box-shaped structure

9: skeg 10: web

(11): Seawater intrusion prevention sealing device (12): Resin choking (or steel liner)

(13): Nut 14: Bolt

Claims (5)

By installing a box-type structure with a space on the top of the cylindrical rudder trunk that surrounds the rudder stock that transmits the rotational force of the steering gear to the steering gear deck, it is configured to be in contact with the steering gear deck, and a rudder carrier separated from the rudder trunk is installed on the top of the box-type structure. A rudder carrier separate rudder trunk assembly, characterized in that the rudder stock is supported to be supported. The method according to claim 1, The box-type structure and the coupling between the rudder carrier are centered and aligned with the rudder stock, and then the bolts and nuts are coupled according to the angled bolt holes, but the tolerance according to the height is adjusted by resin choking or steel liner. Rudder carrier separate rudder trunk assembly, characterized in that. The method according to claim 1, The rudder skeg formed on the rudder trunk has a rudder carrier assembly rudder trunk assembly, wherein a thick iron plate is disposed on the outer plate to extend integrally from the bottom of the rudder trunk connection to the steering gear deck. The method according to claim 1, The rudder trunk separate rudder trunk assembly, characterized in that the web formed in the rudder trunk is welded to the skeg to have a continuous structure integral with the hull structure. The method according to claim 1, The rudder carrier assembly rudder trunk assembly, characterized in that the seawater intrusion prevention sealing device is installed on the bottom of the box-shaped structure of the upper part of the rudder trunk to prevent the inflow of seawater.

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