JPH05229476A - Installation method for rudder for marine vessel - Google Patents

Abstract

PURPOSE:To install a rudder shaft upright without alignment boring by injecting resinous material hardening with time in a place between the outer circumferential surface of each bearing bush and the inner circumferential surface of each bearing boss, and thereby fixing the position of each bearing bush in the radial direction within each bearing boss as the material is hardened. CONSTITUTION:An intermediate bearing 5 has a bearing boss 5a fixed onto the through hole section 3b of a hell 3a, and a lower bearing 7 has a bearing boss 7a fixed onto a shoe piece 6 so as to be provided. Bearing bushes 5b and 7b are loosely engaged with the inside of each bearing boss 5a and 7a respectively with an appropriate gap maintained, the upper and lower rudder shafts 2a and 2b of a rudder shaft 2 are inserted into each bearing bush 5b and 7b so as to be engaged therewith respectively. Moreover, resinous material 11 hardening with time is injected into a gap between the inner diameter of each bearing boss 5a and 7a and the outer diameter of each bearing bush 5b and 7b. And the positions of the bearing bushes 5b and 7b are fixed in the radial direction with the material 11 hardened. As a result, the axial center of the rudder shaft 2 can be completely aligned with the axial centers of the bearing bushes 5b and 7b without centering both the shaft and each bush.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ship rudder mounting method.

[0002]

2. Description of the Related Art In a conventional ship, as shown in FIG. 6, a rudder shaft 2 to which a rudder plate 1 is fixed is supported by a thrust bearing (not shown) of a steering gear 4 having an upper end arranged inside a hull 3. It is supported in the direction of the heart. Further, the rudder shaft 2 is supported by an intermediate bearing 5 provided in the penetrating portion 3b of the hull 3a in the middle of the upper portion, and a lower bearing 7 provided in the shoe piece 6 at the lower end to hold the rudder shaft 2 in the horizontal direction. Further, the intermediate bearing 5 and the lower bearing 7 are composed of bearing bosses 5a, 7a fixed to the hull 3a and bearing bushes 5b, 7b arranged in the bearing bosses 5a, 7a. The shaft 2 is inserted.

The rudder shaft 2 is provided with an intermediate bearing 5 and a lower bearing 7.
It is necessary to align the shaft centers of the bearing bushes 5b and 7b in a straight line to hold the rudderstock 2 straight when inserting the.
Therefore, conventionally, after the bearing bushes 5b and 7b are arranged in the bearing bosses 5a and 7a, the bearing bushes 5b and 7b are
Was performing centering boring processing.

Incidentally, there are ships without the shoe piece 6, but even in that case, the centering boring process for the bearing bush 5b needs to be similarly performed.

[0005]

However, in the above-mentioned conventional rudder mounting structure, the work of centering boring for the bearing bushes 5b and 7b is extremely complicated, and the work of mounting the rudder shaft 2 is increased due to an increase in the man-hours. There is a problem in that the installation cost is increased due to a decrease in efficiency and a longer construction period. Further, in a ship equipped with the shoe piece 6, the shoe piece 6 hinders the rudder mounting work, resulting in a decrease in work efficiency, a longer construction period, and a higher work cost.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a method for mounting a rudder for a ship, in which the rudder shaft can be mounted straight without any centering boring work.

[0007]

In order to solve the above-mentioned problems, the ship rudder mounting structure of the present invention fixes the bearing boss so that the axis of the bearing boss substantially coincides with the axis of the rudder shaft to be mounted. A bearing bush fixed to the structure and fitted to the bearing boss is attached to the rudder shaft, and the rudder shaft is inserted and arranged so that the bearing bush is located in the bearing boss, and the outer circumference of the bearing bush. A time-curable resin material is injected between the surface and the inner peripheral surface of the bearing boss, and the cured resin material fixes the radial position of the bearing bush in the bearing boss.

[0008]

With the above structure, the bearing bush, which is mounted on the rudder shaft in advance, is fixed to the bearing boss through the resin material.
There is no need to re-center the rudder axle and bearing bush when mounting, and the bearing bush that supports the rudder axle
There is no need to perform complicated centering boring that requires a large number of man-hours and costs and a long construction period.

Further, in a ship in which the lower rudder shaft is supported by the shoe piece, it is not necessary to perform centering boring processing with the shoe piece attached to the hull, so that the rudder is attached to the hull without the shoe piece attached. After the rudder is installed, the shoe piece that supports the lower rudder axle is attached to the hull, and a resin that is hardened with time between the bearing boss provided on the shoe piece and the bearing bush provided on the lower rudder axle. By injecting the material, it is possible to position the lower rudder axle with respect to the shoe piece.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. Members having the same functions as those described with reference to FIG. 6 are designated by the same reference numerals and the description thereof will be omitted. Figure 1
, The intermediate bearing 5 is provided with the bearing boss 5a fixed to the through portion 3b of the hull 3a, and the lower bearing 7 is the bearing boss 7
a is fixedly provided on the shoe piece 6. Bearing bushes 5b and 7 are provided inside the bearing bosses 5a and 7a.
b is loosely fitted so as to allow some axial misalignment, and the upper rudder shaft 2a and the lower rudder shaft 2b of the rudder shaft 2 are inserted into the bearing bushes 5b and 7b, respectively. .. Also, the inner diameter of the bearing bosses 5a, 7a and the bearing bush 5
The time-curable resin material 11 is injected into the respective gaps caused by the difference between the outer diameters of b and 7b.
Bearing bosses 5a, 7a and bearing bushes 5b, 7b
Are integrated respectively.

The procedure for mounting the rudder in the above configuration will be described. First, the bearing bosses 5a and 7a are fixed to the penetrating portion 3b and the shoe piece 6, respectively, so that the respective axis centers of the bearing bosses 5a and 7a substantially coincide with the axis center of the rudder shaft 2. Thereafter, the upper rudder shaft 2a and the lower rudder shaft 2b, which are respectively fitted with the bearing bushes 5b and 7b in advance, are fitted into the bearing bosses 5a and 7a, respectively,
In the axial direction, the bearing bushes 5b and 7b are the bearing boss 5.
a and 7a, the bearing bushes 5b, 7b and the bearing boss 5a,
The time-curable resin material 11 is injected into the respective gaps between the inner peripheral surface of 7a and the bearing boss 5 by the cured resin material 11.
The radial positions of the bearing bushes 5b and 7b in the a and 7a are fixed.

As a procedure for mounting the rudder after the shoe piece 6 has been separated from the hull member in advance, the bearing boss 5a first has its axis substantially coincident with the axis of the rudder shaft 2. As described above, it is fixed to the penetrating portion 3b. Then, the rudder shaft 2 in which the bearing bush 5b is mounted on the upper rudder shaft 2a in advance is inserted into the bearing boss 5a so that the bearing bush 5b is located in the bearing boss 5a in the axial direction, and the bearing is placed at that position. The bush 5b is temporarily fixed. Then, the rudder shaft 2 is rotatably fixed to the steering machine 4.

Next, the bearing boss 7a is fixed to the shoe piece 6 which has been separated from the hull member in advance, at a position where the axis of the bearing boss 7a substantially coincides with the axis of the rudder shaft 2. Next, with the bearing bush 7b attached to the lower rudder axle 2b, the shoe piece 6
The bearing boss 7a fixed to the bearing bush 7a is inserted into the bearing bush 7b from below so that the bearing bush 7b is located inside the bearing boss 7a in the axial direction.
While b is temporarily fixed, the shoe piece 6 is welded and fixed to the hull fixing member.

In the above state, the bearing bushes 5b, 7
The time-curable resin material 11 is injected into the respective gaps between the outer peripheral surface of b and the inner peripheral surfaces of the bearing bosses 5a, 7a, and the cured resin material 11 causes the bearing bushes 5b, 7b in the bearing bosses 5a, 7a to move. Fix each radial position.

Therefore, even when the rudder shaft 2 and the bearing bushes 5b and 7b are not centered again at the time of mounting, the bearing bushes 5b and 7b are in a state where the axial center of the bearing bushes 5b and 7b is completely aligned with the axial center of the rudder shaft 2. The bearing bushes 5b and 7b which support the rudder shaft 2 can be fixed to the shoe 3a and the shoe piece 6 without complicated centering boring.

FIG. 2 shows another embodiment of the present invention. Since the intermediate bearing 5 and the lower bearing 7 have basically the same structure, the intermediate bearing 5 will be described here. In FIG. 2, a sleeve 12 is slidably provided in the outer circumference of the bearing bush 5b in the axial direction, and a time-curable gap is formed in the gap between the outer peripheral surface of the sleeve 12 and the inner peripheral surface of the bearing boss 5a. The resin material 11 is injected, and the sleeve 12 and the bearing boss 5a are integrally fixed by the resin material 11.

According to this structure, the bearing bush 5b is temporarily assumed.
If the bearing is damaged or worn, the bearing bush 5b can be pulled out with the sleeve 12 fixed to the bearing boss 5a, and the bearing bush 5b can be easily replaced.

Further, as shown in FIG. 3, the tray plate 13 is attached to the lower surface of the bearing boss 5a so as to close the lower opening of the gap between the bearing boss 5a and the sleeve 12, and the time-curable resin material 11 is injected. At this time, by preventing the resin material 11 in a fluid state from dripping, the resin material 11 can be easily injected.

4 to 5 show still another embodiment of the present invention. 4 to 5, the intermediate bearing 21 is provided with the bearing boss 21a fixed to the stern hull 22,
Inside the bearing boss 21a, a bearing bush 21b that is fitted into the rudder shaft 23 is provided.

A rudder plate 24 is fixed to the lower end of the rudder shaft 23 by hydraulic tightening, welding or keying, and a lower pintle 25 is welded and fixed to the lower end of the rudder plate 24. A shoe piece 26 for supporting the lower pintle 25 is welded and fixed to the hull, and the shoe piece 26 is provided with a lower bearing 27. The lower bearing 27 has a bearing boss 27a fixed to the shoe piece 26 and a bearing bush 27b mounted on the lower pintle 25. A time-curable resin material 28 is injected between the bearing boss 27a and the bearing bush 27b. The bearing boss 27 by the resin material 28.
a and the bearing bush 27b are integrally fixed. An annular tray plate 29 is provided on the lower surface of the shoe piece 26 to close the lower surface opening of the gap formed between the bearing boss 27a and the bearing bush 27b.

In this structure, the rudder shaft 23 is attached to the stern hull 22 with the shoe piece 26 not attached, via the intermediate bearing 21. At this time, the rudder blade 24 may be already fixed to the rudder shaft 23 or may be attached later.

Then, the bearing boss 27a of the lower bearing 27 fixedly fixed to the shoe piece 26 in advance is inserted into the lower pintle 25 and the shoe piece 26 is welded and fixed to the hull fixing member. Further, a bearing bush 27b is attached to the lower pintle 25, and with the bearing bush 27b temporarily fixed, a time-curable resin material 28 is injected into the gap formed between the bearing boss 27a and the bearing bush 27b, and The bearing boss 27a and the bearing bush 27b are integrally fixed by hardening.

Therefore, the rudder mounting work can be performed on the hull without the shoe piece 26 attached, and the rudder mounting work can be facilitated. Also,
Without using the rudder plate 24 and rudder shaft 23 in the flange form,
It can be directly connected by welding or the like. Further, the lower pintle 25 can also be directly connected to the rudder plate 24, so that the rudder structure can be simplified and the construction period can be shortened and the cost can be reduced.

[0024]

As described above, according to the present invention, the bearing bush previously attached to the rudder axle and the bearing boss fixed to the hull fixing structure are integrated with each other by a resin material which is hardened with time. The bearing bush that supports the rudder axle does not have to be subjected to complicated centering boring, which requires a large number of man-hours and costs, and a long construction period. It can be fixed to the hull in the closed state.

Further, it is possible to carry out the rudder mounting work on the hull without attaching the shoe piece, so that the rudder mounting work can be facilitated.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an attachment structure of a ship rudder showing an embodiment of the present invention.

FIG. 2 is a sectional view showing a mounting structure for a vessel rudder showing another embodiment of the present invention.

FIG. 3 is a sectional view showing a mounting structure for a vessel rudder showing still another embodiment of the present invention.

FIG. 4 is a sectional view showing a mounting structure for a vessel rudder showing still another embodiment of the present invention.

5 is an enlarged cross-sectional view of a portion A in FIG.

FIG. 6 is a sectional view showing a conventional boat rudder mounting structure.

[Explanation of symbols]

 2 rudder shaft 3 hull 3a hull 5 intermediate bearing 5a, 7a bearing boss 5b, 7b bearing bush 6 shoe piece 7 lower bearing 11 resin material

Claims (1)

[Claims] 1. A bearing bush is fixed to a hull fixed structure such that the axis of the bearing boss substantially coincides with the axis of the rudder shaft to be mounted, and a bearing bush loosely fitted to the bearing boss is mounted to the rudder shaft. Then, the rudder shaft is inserted and arranged so that the bearing bush is located in the bearing boss, and a time-curable resin material is injected between the outer peripheral surface of the bearing bush and the inner peripheral surface of the bearing boss. A method for mounting a rudder for a ship, comprising fixing a radial position of a bearing bush in a bearing boss with the cured resin material.