JPH10226394A - Rudder horn bearing bush peripheral seal structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain improvement of water-tight performance, particularly in the periphery of a bearing bush of a rudder horn, and simplification of a structure and part mounting work, relating to a support structure of a rudder by the rudder horn. SOLUTION: In this rudder horn bearing bush peripheral seal structure, in order to prevent generation of rust by infiltrating seawater between an internal peripheral surface 2a of a bearing hole part in a rudder horn 2 and a peripheral surface of a water lubricating bush 3a of a bearing 3, a seal groove 8 is formed between the end part periphery of the bush 3a and the rudder horn 2, its inside is charged with a seal material 9, and the bush 3a is held by a bush retainer 10 mounted by welding 11 in the rudder horn 2 so as to cover the seal material 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rudder support bearing for a stern rudder horn, and more particularly, to preventing seawater from entering between a bush on the inner peripheral portion of the bearing and the rudder horn to generate rust. For a seal structure for

[0002]

2. Description of the Related Art Generally, in a ship, as shown in FIG.
Bearings in rudder horn 2 attached to hull 1
Shaft 4a as rudder stock or pintle of rudder 4
Is supported. Figure 2 shows a rudder horn 2 of a conventional ship.
5 shows the state of the support of the rudder shaft portion 4a, and the coaxial portion 4a is supported by a water-lubricated bush 3a on the inner peripheral portion of the bearing 3. A ring is formed in the packing space at the end of the bearing hole so that seawater does not enter the gap between the inner peripheral surface 2a of the bearing hole of the rudder horn 2 and the bush 3a to generate rust. The packing 5 is arranged, and is tightened by a bolt 7 screwed into a bolt hole 7a of the rudder horn 2 via an end flange 3b of a bush 3a and a packing retainer 6.

[0003]

However, in the conventional watertight structure of the outer periphery of the rudder horn bearing bush as described above, the bolt 7 for tightening the packing 5 is required, and the end flange 3b is required for the bush 3a. As a result, the structure becomes complicated and the number of steps for mounting each part is increased.
Insufficient tightening force may result in incomplete water tightness. SUMMARY OF THE INVENTION It is an object of the present invention to provide a ladder horn bearing bush outer peripheral seal structure that improves the watertightness of the outer periphery of a rudder horn bearing bush, simplifies the structure and simplifies the work of mounting components.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a rudder horn bearing bush outer peripheral seal structure according to the present invention is provided with a water-lubricated bush on an inner peripheral portion of a rudder horn mounted on a hull. A seal groove is formed between the outer periphery of the end of the bush and the ladder horn, and the watertight sealing material filled in the seal groove and the bush from the ladder horn so as to cover the seal material. And a bush retainer is provided, the bush retainer being attached to the rudder horn by welding.

[0005] In the above-described outer seal structure of the rudder horn bearing bush of the present invention, the sealing groove along the outer periphery of the end of the bearing bush in the rudder horn is filled with a watertight sealing material, so that a conventional packing retainer with bolts is required. In addition, sufficient watertightness can be obtained with simple work.

[0006] Since the bush retainer covering the seal member is arranged from the ladder horn to the bush and is attached to the rudder horn by welding, the seal member is protected and the bush retainer is attached to the seal member. It is not necessary to apply pressure, and the bush retainer which can be easily attached by welding in this way can provide the effect of preventing the bush from falling off.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view of a main part of a ladder horn bearing bush outer peripheral sealing structure according to an embodiment of the present invention.

In the case of this embodiment, as shown in FIG.
Bearing 3 in rudder horn 2 attached to hull 1
Further, a shaft portion 4a as a rudder stock or pintle of the rudder 4 is supported via a water-lubricated bush 3a.

In the present embodiment, the upper end and the lower end of the bush 3a are prevented so that seawater does not enter the gap between the inner peripheral surface 2a of the bearing hole of the rudder horn 2 and the bush 3a to generate rust. A seal groove 8 is formed between each outer periphery of the portion and the ladder horn 2, and the seal groove 9 is filled with a seal material 9. In the present embodiment, the seal groove 8
Is formed by chamfering the outer peripheral edge of the end of the bush 3a with a concavely curved surface having a diameter of about 10 mm.
May be formed by chamfering the end edge of the inner peripheral surface 2 a of the bearing hole of the rudder horn 2.

As the sealing material 9 filled in the sealing groove 8, a silicone resin sealing material or the like is used.

In the present embodiment, a bush retainer 10 is provided so as to cover the seal member 9 from the rudder horn 2 to the bush 3a, and the bush retainer 10 is attached to the rudder horn 2 by welding 11.

The material of the bush 3a is bronze casting, but the material of the bush retainer 10 may be mild steel. The rudder horn 2 is formed as a steel casting.

In the above-described outer seal structure of the rudder horn bearing bush of the present embodiment, the seal groove 8 along the outer circumference of the end of the bearing bush 3a of the rudder horn 2 is filled with the water-tight sealing material 9, so that the conventional bolted bolt is used. It does not require a packing presser, and sufficient watertightness can be obtained with a simple work.

A bush retainer 10 covering the sealing material 9
Is disposed from the ladder horn 2 to the bush 3a and is attached to the ladder horn 2 by welding 11, so that the sealing material 9 is protected, and it is not necessary to apply pressure to the sealing material 9 by the bush presser 10. Thus, the effect of preventing the bush 3a from falling off can be obtained by the bush retainer 10 which can be easily attached by welding 11.

[0015]

As described above, according to the ladder horn bearing bush outer peripheral seal structure of the present invention, the following effects can be obtained. (1) The seal groove along the outer circumference of the bearing bush on the rudder horn is filled with a watertight sealing material, which eliminates the need for conventional packing retainers with bolts and ensures sufficient watertightness with simple work. become. (2) Since the bush retainer covering the seal material is arranged from the ladder horn to the bush and is attached to the ladder horn by welding, the seal material is protected and the bush retainer is attached to the seal material. There is no need to apply pressure, and the bush retainer, which can be easily attached by welding in this manner, can provide an effect of preventing the bush from falling off.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a main part of a ladder horn bearing bush outer peripheral seal structure as one embodiment of the present invention.

FIG. 2 is a longitudinal sectional view showing a main part of a conventional rudder horn bearing bush outer periphery watertight structure.

FIG. 3 is a longitudinal sectional view showing a schematic structure of a rudder support in a stern rudder horn.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hull 2 Rudder horn 2a Inner peripheral surface of bearing hole 3 Bearing 3a Bush 3b End flange 4 Rudder 4a Shaft 5 Packing 6 Packing retainer 7 Bolt 7a Bolt hole 8 Seal groove 9 Seal material 10 Bush retainer 11 Welding

Claims (1)

[Claims] 1. A rudder horn mounted on a hull having a water-lubricated bush on an inner peripheral portion of a rudder support bearing.
A seal groove is formed between the outer periphery of the end of the bush and the ladder horn, and a watertight sealing material filled in the seal groove is disposed from the ladder horn to the bush so as to cover the seal material. A ladder horn bearing bush outer peripheral seal structure, wherein a bush retainer is provided, and the bush retainer is attached to the ladder horn by welding.