JPS6030159Y2 - Marine side thruster - Google Patents

Description

[Detailed explanation of the idea] The present invention mainly relates to a support structure for a side thruster.

Conventionally, in order to make it easier for ships to berth, turn, etc., in addition to the ship's propulsion device, a tunnel was provided that penetrated the port and starboard sides of the ship, and the propulsion device was installed inside the tunnel to direct water flow from the port side to the starboard side. There is also a method of maneuvering the ship by forcing the ship to drift from starboard to port.

The propulsion device used for this side thruster uses a variable-pitch propeller that can switch the water flow to either the left or right direction by manipulating the blade angle, or one that can rotate forward or reverse.

Conventionally, when installing a thruster in a tunnel for a side thruster, equipment such as support for the thruster and drive gear are manufactured integrally with the tunnel, which requires higher manufacturing accuracy and requires less processing time. The gearbox, which contains the propulsion drive system, requires a long time to manufacture.The precision of the gearbox is low, and the tunnel, which is short in terms of local construction, is manufactured in advance, and then integrated with the gearbox. will begin to do so.

For this reason, there are problems in that there is a failure rate in the process and a decrease in accuracy and efficiency due to the increase in the size of the processing machine.

Furthermore, in the case of maintenance and inspection of the side thrusters, the work must be carried out inside a narrow tunnel, which causes inconvenience.

Based on the above, the present invention relates to a structure that allows the gear box and tunnel of a side thruster to be separated from and connected to each other.Examples of the present invention will be described below with reference to the drawings.

A screw set propulsion device 3 is installed in a tunnel 2 penetrating the inside of the hull 1 on the port and starboard sides, and by changing the rotation direction or the pitch, a water flow can also be created in the direction shifted to the port and starboard sides.

A propulsion shaft 4 supports a propulsion device 3 and transmits power from a prime mover (for example, an electric motor) 7 to an intermediate shaft 6 through a right-angle shaft power transmission device 5.
The gearbox 8 contains these power transmission devices.

Usually, the intermediate shaft 6 and the input side pinion gear of the right-angle shaft power transmission device 5 are constructed as one piece, and there are many design examples in which this can be pulled out upward.

When installing and removing them, it is better to remove the intermediate shaft.

The gear box 8 has an L-shaped upper end surface and is connected to the upper inner wall of the tunnel 2 .

An opening 9 is provided on the upper side of the inner wall of the tunnel, and a flange 10 is mounted toward the inside of the hull, and a flange cover 11 maintains watertightness between the passage of the intermediate shaft 6, the hull, and the tunnel.

As a result, the gear box 8 is almost rigidly and firmly connected to the upper side of the inner wall of the tunnel 2 by the flange, but two plate-shaped stays 12 are used to prevent vibration as shown in FIG.
is stretched almost horizontally between the lower part of the gear box 8 and the inner wall of the tunnel 2.

Each stay 12 has one end fixed to the inner wall of the tunnel 2 by welding or the like, while a projecting piece 13 projects from the gear box 8 and is removably attached to the other end of the stay 12 by a bolt 16.

In this case, it is preferable that the projecting piece 13 is unexpectedly tightened by the stacking bolt 16 with the stay 12 on the upper side.

When welding one end of the stay 12 to the tunnel 2, install the gear box 8 in the correct position relative to the tunnel 2, and perform welding with the other end of the stay 12 tightened to the protruding piece 13 of the gear box 8 with the bolt 16. good.

In some cases, only one stay 12 may be provided on one side.

14, 15, and 16 are mounting bolts, respectively.

As a result, in FIG. 2, the stay 12 suppresses the lower end of the gear box 8 from swinging sideways, but the gear box 8
This structure allows for vertical deflection and manufacturing errors in the tunnel 2, and also allows the gear box 8 to be lowered by removing the bolts 14 and 16 during disassembly.

The upper end surface of the gear box 8 that engages with the flange lid 11 and the upper surface flange of the opening 9 of the tunnel 2 can be easily machined separately, and the stay 12 has a structure that allows manufacturing errors in the vertical direction. Therefore, when a new thruster is manufactured, the gear box 8 and the tunnel 2, which have different processing accuracy and processing time, can be manufactured as separate parts and easily combined during assembly.

It is also easy to disassemble after being attached to the hull.

This disassembly will be explained.

The assembly process is the reverse of the disassembly process, so the assembly process will be omitted.

Referring to FIG. 3, a guide rail 17 for disassembling and assembling is attached to the upper part of the tunnel 2 so that pulleys 18 and 19 slide on the guide rail 17, and the center of the propeller 3 is connected to the rope 20. Pulley 1 by etc.
Support and fix from 8.

Next, the gearbox 8 is supported by the rope 21 using the pulley 19, and the connecting bolts 14, 16 are removed.

When the rope 21 is stretched by cutting the edge between the intermediate shaft and the prime mover, the gearbox 8 rotates downward about the propulsion device 3 as the central axis.

Stretch the rope 21 until the upper end of the gearbox 8 (or the upper end of the intermediate shaft when the intermediate shaft 6 protrudes) enters the tunnel, and while maintaining this state, move the separated gearbox 8 to the propeller 3. Move it sideways while remaining in one piece with it and leave Tunnel 2.

The propulsion device and power transmission device that have been removed from tunnel 2 can be sufficiently maintained as factory work on land, and the installation can be completed by the opposite method to the above, so the processing precision in manufacturing can be efficiently maintained. Of course you can.

When disassembling the gearbox, as shown in FIG. As shown in the figure, if a structure is adopted in which the device is arranged from the bottom upward and is attached to the flange lid 11, the series of operations described above can be performed underwater.

As a result, all of the above-mentioned operations can be accomplished without docking the vessel.

As is clear from the above, the end face of the gearbox is removably attached to the upper side of the tunnel inner wall, and the removable stay provided between it and the tunnel inner wall serves as a steady rest. , parts having mutually different machining accuracy and machining time can be disassembled and joined together without undue stress in terms of strength or deflection tolerance, so the following effects are achieved.

(1) The processes and processing of gearboxes and tunnels can be streamlined.

(2) Materials not suitable for welding, such as cast iron, can be used for the gearbox.

(3) The joint between the gear box and the tunnel can be easily processed and does not cause strain against deflection.

(4) The gearbox can be installed even after the ship is launched.

(5) Therefore, it is possible to avoid the attachment of unnecessary seaweed creatures that may persist for a long time as a successor to the launch.

(6) Mechanical parts can be adequately maintained in a well-equipped factory.

(7) The on-site alignment of the gearbox into the tunnel can be easily adjusted by using a liner or the like.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of the hull showing the parts of the invention, FIG. 2 is a side view of FIG. FIG. 4 is a side view of the embodiment showing the gear box attachment part, and FIG. 5 is a view taken along the line A--A when looking at the space from below. 1...hull, 2...tunnel, 3...
...Screw set propeller, 4...Propulsion shaft,
5... Right angle shaft power transmission device, 6... Intermediate shaft, 7... Prime mover, 8... Gear box, 9... Opening , 10... Flange, 11... Flange lid, 12... Stay, 13... Protrusion plate, 14... Connection bolt, 15 ......Connecting bolt, 16...
・Coupling bolt, 17...Guide rail, 18・
...Pulley, 19...Pulley, 20...
...Rope, 21...Rope, 22,23...
...Watertight lid.

Claims (1)

[Scope of utility model registration request] In a marine side thruster that uses a tunnel penetrating the ship's hull on the port and starboard sides, a screw set propulsion device having its axis on the central axis of the tunnel, and a rotating prime mover of the propeller inside the hull, the power from the prime mover is used. The upper end surface of the propulsion gear box containing the transmission device is removably flange-bonded to the upper side of the tunnel inner wall, and a plate-shaped stay is stretched almost horizontally between the lower part of the gear box and the tunnel inner wall. One end of the stay is welded and fixed to the inner wall of the tunnel, and the other end protrudes from the gear box and is removably fixed to the protruding piece by stacking the stay side upward and the protruding piece downward. side thruster.