JPH0752881A - Axial system assembling method for ship provided with counter-rotating propeller - Google Patents

Abstract

PURPOSE:To provide an axial system assembling method which allows its inner shaft to be stably supported when the inner shaft is inserted into the inner shaft bearings, prevents dust and the like from ingressing in the inner shaft bearings, and is thereby excellent inlabor saving, rapidity and reliability for working. CONSTITUTION:In the ship provided with a counter-rotating propeller where an inner shaft 010 which has a rear propeller fitted in at its ear end, and an outer shaft 05 which has a front propeller fitted in at its rear end are relatively and coaxially counter rotated, an inner shaft 010 is inserted into the inner shaft bearings 06 and 07 of an outer shaft 05 in a plant capable of being shielded first. The rear end of the outer shaft 05 and the rear end of the inner shaft 010 are then relatively integrated by a temporary fixing fitting 2, and furthermore, the outer shaft 05 and the inner shaft 010 which have been integrated, are inserted into the outer shaft bearing 03 and 04 of a stern tube 2 of a ship yard from behind.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shaft assembly method for a contra-rotating propeller ship.

[0002]

2. Description of the Related Art As a shaft system assembling method for a contra-rotating propeller ship, conventionally, for example, those shown in FIG. 6 (1) longitudinal section and FIG. 6 (2) longitudinal section are known. That is, first, as shown in FIG. 6 (1), the outer shaft bearings 03, 04 are internally fitted to the front and rear end portions of the stern tube 02 horizontally penetrating the stern material 01, respectively. The outer shaft propeller shaft (hereinafter referred to as the outer shaft) 05 is coaxially inserted from the side. Where 0
Reference numerals 6 and 07 denote inner shaft bearings that are internally fitted to the front and rear ends of the outer shaft 05, and 011 denotes an outer shaft flange that is provided around the rear end of the outer shaft 05.

Next, as shown in FIG. 6 (2), the front end of the outer shaft 05 is fixed to the shaft chamber 09 with a fastener 08, and then the inner shaft bearings 06 and 07 are coaxially fitted from the rear side to the inner shaft. Insert 010. In the figure, the shaft chamber 09 on the front side of the stern tube 02
Since the reversing gear device is disposed in the stern, the outer shaft 05 and the inner shaft 010 are respectively inserted into the stern tube 02 from the rear side of the stern tube 02 while avoiding this.

However, such a method has the following drawbacks. (1) In the construction dock 012, insert the outer shaft 05 into the outer shaft bearings 03 and 04, or insert the outer shaft 05 into the inner shaft bearings 06 and 07.
When inserting the outer shaft 05 and the inner shaft 010, the weight of the outer shaft 05 and the inner shaft 010 are supported by a hanging tool, a trolley, etc. arranged outdoors, so that the stability of the work cannot be said to be sufficient, and therefore, much labor and time are required. Costly and uneconomical. (2) Since the construction dock 012 is not sufficiently shielded from wind, rain, and dust, there is a risk that dust will enter the outer shaft bearings 03, 04 and inner shaft bearings 06, 07. Therefore, there is a problem in work reliability.

[0005]

SUMMARY OF THE INVENTION The present invention has been proposed in view of such circumstances, and when the inner shaft is inserted in the bearing for the inner shaft, the inner shaft is stably supported and the inner shaft is supported. It is an object of the present invention to provide a shaft assembly method for a contra-rotating propeller ship, which is free from the risk of dust entering the bearings for use, and therefore is excellent in labor saving, quickness, and reliability.

[0006]

Therefore, according to the present invention, an inner shaft having a rear propeller fitted to its rear end and an outer shaft having a front propeller fitted to its rear end are coaxially inverted with each other. In a heavy-duty reverse propeller ship, first insert the inner shaft into the bearing for the inner shaft of the outer shaft in a factory that can be shielded, and then insert the rear end of the outer shaft and the rear end of the inner shaft into each other with temporary fastening hardware. It is characterized in that the outer shaft and the inner shaft are integrated, and the integrated outer shaft and inner shaft are inserted from the rear into a bearing for an outer shaft of a stern tube at a construction site.

[0007]

With such a structure, the inner shaft having the rear propeller fitted to the rear end and the outer shaft having the front propeller fitted to the rear end are coaxially reversed with respect to each other. In the first, the inner shaft is inserted into the bearing for the inner shaft of the outer shaft in a factory that can be shielded, and then the rear end of the outer shaft and the rear end of the inner shaft are integrated with each other by a temporary fastening metal, and Since the integrated outer shaft and inner shaft are inserted into the outer shaft bearing of the stern tube at the construction site from the rear, the following actions are performed. (1) When the inner shaft is inserted into the inner shaft bearing of the outer shaft, the inner shaft supported by the hanger or the carriage is not affected by wind and rain, and the work stability is increased. (2) When inserting the inner shaft into the bearing for the inner shaft of the outer shaft, there is no risk that foreign dust will enter between them.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. The same reference numerals as those in FIG. 6 denote the same members as those in the same drawing. First, in FIG. This is a machine factory where high-end exclusive hangers and trolleys are installed and the building can be shielded from the outside world.

Next, in the longitudinal sectional view of FIG. 1 (2), reference numeral 2 denotes the inner shaft 0 inserted in the inner shaft bearings 06, 07 in the machine factory 1.
In order to prevent the outer shaft 10 and the outer shaft 05 from being displaced from each other in the axial direction or the circumferential direction, the vertical fixing section is an inverted U-shaped fixed metal object having vertical flanges 3 at the upper and lower ends, respectively. Each vertical flange 3 of the fixed hardware 2 is fixed to the outer shaft flange 011 by a horizontal bolt 4, and the central rear end of the fixed hardware 2 is fixed to the rear end of the inner shaft 010 by two horizontal bolts 5. These are in an integrated state, and there is no construction risk.
It is inserted into the outer shaft bearings 03, 04 of the stern tube 02 via a crane (not shown).

In order to assemble the shaft system in such a structure, for example, one embodiment of a tanker having a loading capacity of 258,000 t will be described. First, the outer shaft 05 and the inner shaft 010.
As a preliminary preparation for the integrated assembly with, as shown in the longitudinal sectional view of FIG. 2 (1), in the machine factory 1, the temporary shaft 5 is attached to the front end of the inner shaft 010 and the temporary shaft 5 is set up at the positions A, B, and C, respectively. The inner shaft 010 is made horizontal by using the tightening bolts 6, the surface plate 7, the triangular base 8, the hydraulic jack 9 and the like which are provided.

Subsequently, as shown in FIG. 2 (2), the outer shaft 05
Guide sleeve 10, at the front end, rear end, and rear end of the
After attaching the waterproof plate 11 and the guide sleeve 12, the outer shaft 05 is hung by the overhead crane 13 at two points and made horizontal.

Next, since the outer shaft 05 and the inner shaft 010 are integrally assembled, as shown in FIG. 3 (1), while measuring the clearance between the inner shaft 010 and the guide sleeve 12 with a clearance gauge, 05 and the inner shaft 010 are coaxial, and the outer shaft 0
5 is gradually moved backward by the overhead crane 13.

Then, as shown in FIG. 3 (2), the inner shaft 01
If the temporary shaft 5 of 0 is partially out of the guide sleeve 10, the position D is pushed up by the hydraulic jack 13a, and the inner shaft 0
After setting 10 horizontal, the hydraulic jack 9 in position C (see FIG.
(1)) is removed, and the outer shaft 05 is gradually moved further rearward by the overhead crane 13.

Further, as shown in FIG. 4 (1), the guide sleeve 10 is moved forward.

Then, the outer shaft 05 is gradually moved rearward by the overhead crane 13, and if the outer shaft 05 and the inner shaft 010 are integrally assembled as shown in FIG. Rusted and packed, and shipped to the construction dock.

Then, when the outer shaft 05 and the inner shaft 010 in the integrated state are carried into the construction dock 012, these packages are unpacked, and as shown in FIG. A pair of front and rear trolleys 1 on the inserted pedestal 14
After mounting the outer shaft 05 and the inner shaft 010 on the shafts 5, 15, they are drawn into the stern tube 02 by the air chain block 16 to complete the integrated insertion work.

According to the method of this embodiment, the inner shaft having the rear propeller fitted to the rear end and the outer shaft having the front propeller fitted to the rear end are coaxially inverted with each other. In a heavy-duty reverse propeller ship, first insert the inner shaft into the bearing for the inner shaft of the outer shaft in a factory that can be shielded, and then insert the rear end of the outer shaft and the rear end of the inner shaft into each other with temporary fastening hardware. The integrated outer shaft and the inner shaft are inserted into the outer shaft bearing of the stern tube at the construction site from the rear side, so that the following effects can be obtained. (1) When inserting the inner shaft into the bearing for the inner shaft of the outer shaft, the inner shaft supported by the hanger or the carriage is not affected by the wind and rain, and the stability of the work is increased, thus saving labor in the work. And the speed is improved. (2) When the inner shaft is inserted into the inner shaft bearing of the outer shaft, there is no risk of foreign dust entering between them, thus improving work reliability.

[0018]

In summary, according to the present invention, the inner shaft having the rear propeller fitted to the rear end and the outer shaft having the front propeller fitted to the rear end are coaxially inverted with respect to each other. In a ship, first insert the inner shaft into the bearing for the inner shaft of the outer shaft in a factory that can be shielded, and then integrate the rear end of the outer shaft and the rear end of the inner shaft with a temporary fastening hardware, Further, by inserting the integrated outer shaft and inner shaft into the outer shaft bearing of the stern tube at the construction site from the rear, the inner shaft is stably supported when the inner shaft is inserted into the inner shaft bearing. In addition, the present invention provides a shaft assembly method for a contra-rotating propeller ship that is free from the risk of dust and the like entering the inner shaft bearing, and is therefore excellent in labor saving, quickness, and reliability. Above all, it is extremely useful.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, in which (1) and (2) respectively insert the inner shaft 010 into the inner shaft bearings 06 and 07 and the outer shaft 05 into the outer shaft bearings 03 and 04. It is a longitudinal cross-sectional view showing the point.

2 (1) and (2) are vertical cross-sectional views showing how to integrally incorporate the inner shaft 010 and the outer shaft 05 of FIG. 1, respectively.

3 (1) and (2) are respectively the inner shaft 0 of the outer shaft 05 of FIG.
FIG. 3 is a vertical cross-sectional view showing a first period and a second period of the work of integrally incorporating into 10.

4 (1) and (2) are respectively the inner shaft 0 of the outer shaft 05 of FIG.
FIG. 10 is a vertical cross-sectional view showing the third and fourth periods of the work of integrally incorporating into 10.

FIG. 5 is a vertical cross-sectional view showing how to integrally insert the outer shaft 05 and the inner shaft 010 that are integrally incorporated into the outer shaft bearings 03 and 04 of the stern tube 02.

FIG. 6 shows a shaft assembly procedure of a known counter-rotating propeller ship, and (1) and (2) are vertical cross-sectional views showing how to insert an outer shaft and an inner shaft, respectively.

[Explanation of symbols]

 1 Machine Factory 2 Fixed Hardware 3 Vertical Flange 4 Bolt 5 Bolt 6 Tightening Bolt 7 Surface Plate 8 Triangle Base 9 Hydraulic Jack 10 Guide Sleeve 11 Waterproof Plate 12 Guide Sleeve 13 Overhead Crane 13a Hydraulic Jack 14 Insert Table 15 Cart 16 Air Chain Block 01 Stern material 02 Stern tube 03 Outer shaft bearing 04 Outer shaft bearing 05 Outer shaft 06 Inner shaft bearing 07 Inner shaft bearing 010 Inner shaft 011 Outer shaft flange 012 Construction dock

Claims (1)

[Claims] 1. A double-reversal propeller ship in which an inner shaft having a rear propeller fitted to its rear end and an outer shaft having a front propeller fitted to its rear end are coaxially reversed with respect to each other, can be first shielded. In the factory, insert the inner shaft into the inner shaft bearing of the outer shaft, and then integrate the rear end of the outer shaft and the rear end of the inner shaft with each other by a temporary fixing metal, and further integrate the above. A method for assembling a shaft system of a contra-rotating propeller ship, characterized in that an outer shaft and an inner shaft are inserted into a bearing for an outer shaft of a stern pipe at a construction site from the rear.