JPH0321358Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to the assembly structure of a marine propeller, and more specifically, the propeller shaft of the propeller shaft system is rotatably fitted into the stern tube and integrated with the stern tube. The present invention relates to an assembly structure for a marine propeller that can be carried in and out of the ship from outside the ship, including the stern tube. This is used in the field of technology for attaching variable pitch propellers to ship hulls.

[Conventional technology]

The installation of the conventional marine propeller shaft system 1 shown in FIG.
is inserted from the stern side of the hull 5 toward the bow of the boat as indicated by the arrow 20. Then, the propeller shaft 6 is rotatably attached to bearings 8A, 8B made of white metal or the like installed on the inner surface of the stern tube 4, and is made water-sealed by seal members 9A, 9B, completing installation on the hull 5. be done.

Conventionally, the individual parts of the propeller shaft system 1 are usually attached to the ship's hull 5 only on the ship's platform. Therefore, in order to attach the stern tube 4 to the inner surface 2a of the stern frame 2 and the inner surface 3a of the hull member 3 shown in the figure, the same high precision processing as the outer surfaces 4a and 4b of the stern tube 4 is required. . Therefore, high-precision machining and assembly work is required on the ship's platform, and the machining process requires time and effort, resulting in a large number of man-hours and an increase in costs.

[The problem that the idea attempts to solve]

By the way, Japanese Utility Model Application Publication No. 58-139297 describes a propeller tightening mechanism that makes it possible to pull out and press fit the propeller shaft while the ship is floating on the sea. ing. According to this, the propeller shaft is pulled into the ship and rotated to connect with the seal/coupling mechanism, and pressurized oil is supplied to the oil groove at the tip of the propeller shaft where the propeller is fitted. without loosening the coupling and rotating the propeller shaft.
It is now possible to pull it into the ship.

However, this structure allows only the propeller shaft to be pulled out toward the bow, and is intended for fixed pitch propellers. Therefore, the stern tube, propeller, propeller shaft, and sealing member are delivered separately to a yard and assembled on the ship's platform, which makes the work area inconvenient and requires a large amount of work cost. On the other hand, the stern tube mounting hole in the hull requires high precision, and the weight of the propeller causes the propeller shaft to bend, requiring slope boring for the bearing in the stern tube on the ship's platform. This is also a special machining process and has the problem of increasing costs. In any case, the stern tube, the propeller shaft, and the propeller are not assembled as one body in a factory and incorporated into the hull, which causes the above-mentioned problem.

This idea was created in view of the problems mentioned above.
The purpose is to incorporate the propeller shaft system into the hull.
To simplify and speed up the work of assembling a propeller shaft system in a ship's platform by making it possible to integrally install a propeller shaft system and a stern tube, that is, a variable pitch propeller,
To enable propeller shafts, stern tubes, bearings, seal members, etc. to be assembled into units at a shaft system factory with good work space and delivered to yards, to eliminate the need for slope boring, which is difficult to process, and to manufacture stern tube mounting holes in ship hulls. A marine product that achieves the ability to improve assembly accuracy while not requiring high accuracy, and to combine everything from propellers to seal members into a single unit product. The purpose of the present invention is to provide a propeller assembly structure.

[Means to solve the problem]

This invention connects the propeller shaft and variable pitch propeller, incorporates this into the stern tube,
It is applied to a propeller assembly structure that allows the propeller shaft system to be carried into and out of the ship's hull integrally with the stern tube.

As shown in FIG. 1, at least the stern side bearing 8 that supports the propeller shaft 6 incorporated in the stern tube 4 has a two-split structure that allows the propeller shaft 6 to be misaligned. This is a self-aligning bearing 18A. Between the upper propeller shaft 6 and each end of the stern tube 4, seal members 9, 9 having a two-piece structure for water sealing are installed. The stern side flange 6a for attaching the variable pitch propeller 7 and the bow side flange 6A having a diameter _D2 smaller than the minimum diameter D1 of the stern tube mounting hole 5d provided in the hull 5 _are attached to the propeller shaft 6.
is formed integrally with the And the stern side flange 6a
and the stern side flange 4d at the stern end of the stern tube 4 are connected and fixed, and the seal members 9,9
A fixing tool 11 is attached to the propeller shaft 6, which is assembled into the stern tube 4 using the bearings 18A, 8, etc., and is used to integrate the propeller shaft 6 into the stern tube 4.

[Effect]

A stern tube 4, a propeller shaft 6, a variable pitch propeller 7, etc. are processed with high precision, assembled at a shaft system factory while maintaining precision, and then fixed integrally with a fixing tool 11. The propeller shaft system 10 thus formed is carried into the hull 5 as a single product, and the stern tube 4 and the propeller shaft system 10 are attached to the hull 5. If the axis of the reducer 13 is deviated from the center of the stern tube attachment hole 5d, the stern side of the stern tube 4 will be fixed to the hull 5c, while the gap δ between the outer surfaces 4a and 4b of the stern tube 4 to be fitted will be ₁ and δ ₂ to adjust the center line of the propeller shaft 6 to match the center line of the reduction gear 13.

Fixing tool 11 after installing propeller shaft system 10
Remove the bow side flange 6A of the propeller shaft 6.
is attached to the output shaft of the reducer 13, the assembly work is completed. When removing the propeller shaft system 10 from the hull 5, the procedure may be reversed.

In this way, the propeller shaft system 10 is carried into the hull 5 by moving the stern tube 4 along with the stern tube from outside the ship toward the bow, and the propeller shaft system 10 is carried out from the hull 5 with the stern tube 4 from the bow side. This can be done by moving it outboard on the stern side.

[Effect of idea]

According to the present invention, when installing the propeller shaft system into the ship's hull at the ship's platform, it is possible to absorb the misalignment between the stern tube mounting hole in the ship's hull and the reducer, etc.
In addition, by using a fixing tool that connects the bow side flange of the propeller shaft to the bow side flange of the propeller shaft, which has a smaller diameter than the minimum diameter of the stern tube mounting hole, and integrates the propeller with the stern tube,
The work of loading and unloading the unitized propeller shaft system from the outside of the vessel on the stern side is simplified and speeded up, and moreover, the assembly accuracy can be improved.

In addition, the stern tube, propeller shaft, and variable pitch propeller are assembled as one unit with high precision in the factory, eliminating the need for highly accurate assembly and complicated machining work on the ship's platform. Therefore, the number of man-hours required for assembling is reduced, and significant cost reductions are achieved, thereby reducing ship construction costs.

〔Example〕

EMBODIMENT OF THE INVENTION Below, the assembly structure of the marine propeller of this invention is demonstrated in detail based on the drawing which shows the Example.

In the propeller shaft system 10 shown in FIG. 1, a propeller shaft 6 having a built-in pressure oil introduction pipe and a variable pitch propeller 7 are machined with high precision in a factory, and then the two are connected and integrated with bolts or the like. That is, the propeller shaft 6 and the variable pitch propeller 7 are connected, and this is assembled into the stern tube 4,
The propeller shaft system 10 can be carried into and out of the hull 5 integrally with the stern tube 4.

Flanges are integrally formed at both ends of the propeller shaft 6, and these include a stern side flange 6a for attaching the variable pitch propeller 7, and a stern side flange 6a for attaching the variable pitch propeller 7.
The bow side flange 6A has a diameter _D1 smaller than the minimum diameter _D2 of the stern tube mounting hole 5d provided in the stern tube. Therefore, when attaching the assembled propeller shaft system 10 to the hull 5, the propeller shaft system 1
Connect the bow side of the 0 to the stern tube mounting hole 5d.
It can be connected to the speed reducer 13 through the .

On the other hand, the stern tube 4 is also machined with high precision in the factory, and bearings 8, 8 and seal members 9, 9 are attached to each end of the stern tube, and the contact surface of the stern flange 4d that contacts the hull 5 4c is processed in advance. The two outer surfaces 4a and 4b of the stern tube 4 do not come into direct contact with the corresponding two opposing surfaces 5a and 5b of the hull 5, and certain gaps δ ₁ and δ ₂ are ensured, respectively. Preparations have been made for smooth integration into the hull 5. As a result, high accuracy is not required for the stern tube mounting hole 5d, and therefore, even if there is misalignment between the reducer 13 and the stern tube mounting hole 5d, the propeller shaft system 10 can be easily assembled into the hull 5. This also reduces boring costs.

At least a bearing 8 on the stern side that supports the propeller shaft 6 incorporated in the stern tube 4
A self-aligning bearing 18A that allows the propeller shaft 6 to be misaligned is adopted. The bearings 18A, 8 have a two-piece structure, and the flanges 6a, 6 mentioned above
Even if A exists, it can be attached to the propeller shaft 6. On the other hand, the seal members 9, 9 provided between the propeller shaft 6 and each end of the stern tube 4 function to make the inside of the stern tube 4 water-sealed, and these also have a two-split structure. has been done.

The stern flange 6a and the stern flange 4d provided at the stern end of the stern tube 4 are connected and fixed. For this purpose, a fixing tool 11 is attached that integrates the propeller shaft 6, which has been incorporated into the stern tube 4 using seal members 9, 9, bearings 8, 8, etc., into the stern tube 4.

Therefore, after the propeller shaft 6 and the variable pitch propeller 7, which are connected by the above connection, are assembled into the stern tube 4, the stern side flange 4d of the stern tube 4 and the stern side flange 6a of the propeller shaft 6 are connected. When the fixing tool 11 is installed between them, the propeller shaft system 10 consisting of the stern tube 4, the propeller shaft 6, the variable pitch propeller 7, etc. described above is made into an integrated product. As a result, the propeller shaft system 10 can be carried into and out of the ship with the stern tube 4.

The propeller shaft system 10 is carried into the hull 5 by moving the stern tube 4 along with the stern tube from the outside of the ship toward the bow, and the propeller shaft system 10 is carried out from the hull 5 with the stern tube 4 from the bow side to the stern side. This is done by moving the vessel out of the ship.

According to the assembly structure of a marine propeller having such a configuration, the propeller shaft system 10 can be easily and accurately attached to and detached from the hull 5 at the ship platform as described below.

As shown in Fig. 1, the stern tube 4, propeller shaft 6, variable pitch propeller 7, etc. are machined with high precision as described above, and after being assembled at a shaft system factory while maintaining high precision, the fixing tools are assembled. 1
1, the propeller shaft system 10
are carried into the hull 5 as one product. During the installation work of the propeller shaft system 10 on the ship's platform, the worker assembled the propeller shaft system 10 into a single product.
Hull 5 with stern tube 4 on board the slipway
Insert inside.

Reducer 13 for reducing the rotation of the prime mover 17
If the axial center of the stern tube is deviated from the center of the stern tube attachment hole 5d, the centering is adjusted using the above-mentioned gaps δ ₁ and δ ₂ . That is, after adjusting the misalignment, the worker fixes the stern tube 4 to the stern hull 5c with bolts 14, and then adjusts the tip of the plate 16 on the bow side from the stern tube mounting hole 5d in the vertical and horizontal directions. If the propeller shaft 6 is moved, the center line of the propeller shaft 6 is aligned with the reducer 13 by using the gap δ ₂ between the mounting hole 16a bored in the plate 16 and the outer surface 4b of the stern tube 4 fitted into the mounting hole 16a. Adjust to match the center line of

In this way, the centering of the propeller shaft system 10 can be performed, and the propeller shaft system 10 can be installed in the ship's platform without requiring high-precision machining and in a short period of time and effort. Note that when the fixing tool 11 is removed after installation and the bow side flange 6A of the propeller shaft 6 is attached to the output shaft of the reducer 13,
The installation work is completed. Needless to say, when removing the propeller shaft system 10 from the hull 5, the above-described procedure may be reversed.

Figure 2 shows an example where the reducer 13 connected to the prime mover 17 and the center line 5m of the stern tube mounting hole 5d of the hull 5 (see Figure 1) are inclined by θ degrees, and the inside of the stern tube 4 is tilted by θ degrees. The bearings installed in both are self-aligning bearings 18A and 18B.
If the thickness of the stern tube 4 is made thinner in advance at the α portion shown in FIG. Centering can be performed by utilizing the cardiac function and the deflection characteristics due to the flexible structure of the stern tube 4. The adjustment to match the centerline of the propeller shaft 6 with the centerline of the reduction gear 13 is as described above. At this time, since the stiffness of the stern tube 4 is low, the operator can easily perform centering. Thereafter, the plate 16 may be fixed to the hull 5 with bolts 15.

In this way, if the stern tube mounting hole is made larger than usual and at least the bearing on the stern side of the stern tube is a self-aligning bearing, misalignment between the stern tube mounting hole and the reducer etc. This makes it easier to carry the stern tube into and out of the ship. In addition, the bow side flange of the propeller shaft is formed to have a smaller diameter than the minimum diameter of the stern tube mounting hole, and the propeller is integrated into the stern tube using a fixing tool, so the propeller shaft system is attached to the hull from the stern side. It can be brought in and taken out. Therefore, it is extremely easy to assemble the stern tube, propeller shaft, and variable pitch propeller as one body in a factory and attach it to the hull, and there is no need to manufacture the stern tube mounting hole in the hull with high precision. . In addition, it is possible to avoid slope boring of the bearing in the stern tube on the ship's platform due to the propeller shaft being bent by the weight of the propeller. Moreover, everything from the propeller to the seal member can be made into one unit product.

As explained above in detail, by connecting the propeller shaft and the variable pitch propeller, incorporating this into a stern tube to which a bearing such as a self-aligning bearing and a sealing member are attached, and integrating it with a fixing tool. , transporting the propeller shaft system to the ship's hull.
Since the stern tube can be carried out together with the stern tube, the task of assembling the propeller shaft system into the ship's hull at the berth is simplified and speeded up, and the accuracy of assembly can be improved. In addition, the stern tube, propeller shaft, and variable pitch propeller can be assembled as one unit with high precision in the factory, eliminating the need for highly accurate assembly and complicated machining work on the platform. Therefore, the number of man-hours required for assembly is reduced, and significant cost reductions are realized, thereby reducing ship construction costs.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a marine propeller assembly structure according to an embodiment of the present invention, FIG. 2 is a schematic diagram of a different embodiment, and FIG. 3 is a longitudinal sectional view of a conventional marine propeller assembly structure. 4...Stern tube, 4d...Stern flange of stern tube, 5...Hull, 5d...
Stun tube mounting hole, 6...Propeller shaft, 6
A... Bow side flange of propeller shaft, 6a... Stern side flange of propeller shaft, 7... Variable pitch propeller, 8... Bearing, 9... Seal member, 10...
...Propeller shaft system, 11...Fixing tool, 18A...
Self-aligning bearing.

Claims (1)

[Claims for Utility Model Registration] Connecting a propeller shaft and a variable pitch propeller,
This is a propeller assembly structure in which this is incorporated into the stern tube and the propeller shaft system can be carried in and out of the ship integrally with the stern tube, and at least the stern supports the propeller shaft incorporated in the stern tube. The side bearing is a self-aligning bearing with a two-split structure that allows for misalignment of the propeller shaft, and there is a two-split structure self-aligning bearing between the propeller shaft and each end of the stern tube for water sealing. A stern side flange to which a sealing member is attached and for attaching a variable pitch propeller, and a bow side flange having a diameter smaller than the minimum diameter of the stern tube mounting hole provided in the hull are integrally formed on the propeller shaft, A fixing tool connects and fixes between the side flange and the stern end of the stern tube, and integrates the propeller shaft, which is incorporated into the stern tube using the seal member, bearing, etc., into the stern tube. The propeller shaft system is carried into the hull by moving the stern tube along with the stern tube from the outside of the stern toward the bow, and the propeller shaft system is transported along with the stern tube from the bow toward the outside of the stern. An assembly structure for a marine propeller, characterized in that it can be moved.