JPH05476Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a swing-type marine propeller, and more specifically, to an improvement of a hydraulic pressure source for changing the pitch of a variable pitch propeller or a hydraulic passage for supplying lubricating oil. It is something. This is used in the field of swing-type marine propellers, where the propeller can be swung up above the water surface for inspection and maintenance without removing fluid piping.

[Conventional technology]

Swing-type marine propellers have recently been adopted for oil barges and the like. When such an oil barge is stopped for a long period of time or when the onboard propeller needs to be inspected and maintained, the propeller is swung up above the water surface. As shown in FIG.
Remove the separately connected fluid piping 3,
This is done by rotating the propeller 6 in the direction of the arrow 5 around the swing fulcrum 4.

[The problem that the idea aims to solve]

By the way, fluid such as oil is constantly flowing or filled in the fluid piping 3 for supplying fluid from the hydraulic unit 7 to the lower gear box 8 etc. for lubrication or for operating to vary the propeller pitch. There is. Therefore, as mentioned above, when swinging up the propeller 6,
When the fluid piping 3 is removed from the upper gearbox 1 or a connection point near the upper gearbox 1, there is a problem that the fluid remaining in the fluid piping 3 leaks out of the piping and contaminates the area around the upper gearbox 1.

In addition, when swinging up the propeller 6, the fluid piping 3 is also removed along with the drive shaft 2, and when the propeller 6 is to be used again, it is necessary to connect them, which poses the problem of requiring a lot of preparation work. In addition, a long rubber hose may be used to save the trouble of removing the fluid piping 3, but the hose may flood a narrow space.
Undesirable.

For example, Japanese Unexamined Patent Publication No. 53-104991 describes a device capable of swinging up a propeller. However, this requires a flexible hose or a deformable linkage mechanism, as mentioned above, because the fluid piping is not at the center of the swing and the swing is to be made possible. This is to avoid leakage of hydraulic oil. As a result, the piping material becomes a rubber hose or the like, making it difficult to handle high pressures.On the other hand, if a link mechanism is adopted, the device becomes larger.

If the purpose of using the fluid pressure source is to change the pitch of a variable pitch propeller, it is required to be able to withstand high pressure, and the piping material for this purpose must have a thick wall structure. However, in order to absorb the movement of the propeller, the piping material needs to have a sufficient amount of slack, which requires a large space. Therefore, it is not easy to increase the pressure with piping structures that involve movement, such as flexible hoses.In addition, there are many restrictions on securing extra space in the propeller installation area, which has limited space, and it is difficult to achieve high pressure on ships. In some cases, the vicinity is used as a workshop, and the reality is that saving space poses a considerable problem.

This idea was created in view of the problems mentioned above.
The purpose is to be able to swing up the propeller without removing the fluid piping, and even if this movement is possible, high pressure in the piping system can be achieved.
Moreover, the piping system does not deform in response to the swing motion, and no space is required for this purpose.
It is an object of the present invention to provide a swing-type propeller for a ship that can speed up swing-up work and prevent oil pollution.

[Means to solve the problem]

The present invention consists of an upper gearbox, a lower gearbox, a shaft casing that connects both gearboxes, a power transmission shaft built into the shaft casing, a propeller shaft built into the lower gearbox, and a propeller. A fluid piping for supplying lubricating oil or hydraulic oil to the lower gearbox is applied to the swing type marine propeller provided within the shaft casing.

Its features are explained with reference to FIG. 1. It is fixed directly to the shaft casing 11,
Swing center shaft 13 with a fluid passage 20 inside
The swing center shaft 13 is rotatably attached via a seal 18, and a fluid supply adapter 15 is provided for supplying fluid from the hydraulic unit 17 to the fluid passage 20 within the swing center shaft 13.

[Effect]

Only the drive shaft 2 attached to the upper gearbox 1 is removed, and the swing center shaft 13 is rotated in order to swing up the propeller 12. Since the swing center shaft 13 is rotatably attached to the fluid supply adapter 15, the shaft casing 11 can be swung. During this time, the fluid passage 20 of the swing center shaft 13 remains connected to the fluid supply adapter 15, and no hydraulic oil leaks. The connection between the fluid passage 20 and the fluid piping 21 is maintained, and even if the shaft casing 11 rotates, the connection at the connection point will not be broken. The fluid passage 20 provided in the swing center shaft 13 is located at the center for swinging the propeller 12, and remains in a fixed position regardless of the swing. Therefore, there is no change in the hydraulic oil path, and residual hydraulic oil does not leak out during the swing.

[Effect of idea]

According to the present invention, there is no need to remove the fluid pipe when swinging up the propeller, and it is possible to avoid fluid remaining in the fluid pipe leaking to the outside and polluting the surrounding area, deteriorating the working environment. In addition, the trouble of removing and attaching fluid piping as described in the related art is eliminated, and swing-up work and work time can be reduced. The fluid piping can have a fixed structure that can withstand high pressure, and can also form a passage for a hydraulic source for changing the pitch of a variable pitch propeller or high pressure oil such as lubricating oil. The passage is located at the center of the swing and does not move, allowing the devices and mechanisms to be compacted.

〔Example〕

The swing type ship propeller of this invention is shown below.
The embodiment will be described in detail based on the drawings showing the embodiment. FIG. 1 shows a schematic diagram of a swing type marine propeller which is an embodiment of the present invention. This consists of an upper gearbox 1, a lower gearbox 8, and a shaft casing 11 that connects both gearboxes 1 and 8.
, a power transmission shaft 10 built into the shaft casing 11, a propeller shaft 9 built into the lower gear box 8, and a propeller 12 attached to the propeller shaft 9. A fluid pipe 21 for supplying lubricating oil or hydraulic oil to the lower gear box 8 is provided within the shaft casing 11. That is, from the power transmission shaft 10 to the propeller shaft 9
When power is transmitted to the propeller 12, the propeller 12 rotates.

The above-mentioned shaft casing 11 has a swing center shaft 13 fixed perpendicularly thereto at the upper part, and a fluid passage 20 is formed inside the swing center shaft 13 . At the shaft portion of this swing center shaft 13, in this example, at the shaft end,
For example, it is fixed to the hull 14 via a seal 18,
A fluid supply adapter 15 is provided to rotatably attach the swing center shaft 13. This is to supply fluid from the hydraulic unit 17 to the fluid passage 20 in the swing center shaft 13 without interruption.

This fluid supply adapter 15 includes a fluid piping 16.
The hydraulic unit 17 is connected via the hydraulic unit 17, and the working fluid is supplied to the fluid supply adapter 15 from the hydraulic unit 17.
It is now being supplied to Note that the seal 18 between the fluid supply adapter 15 and the swing center shaft 13 functions to prevent fluid from the hydraulic unit 17 from leaking to the outside.

In order to supply the fluid supplied from the hydraulic unit 17 to the propeller operating mechanism (not shown) built in the lower gear box 8, the fluid passages 19 and 20 and the fluid piping 21 are connected to the fluid supply adapter 15 and the swing center. Shaft 13, shaft casing 1
1.

Furthermore, when the fluid supplied from the hydraulic unit 17 increases in various ways, such as lubricating oil for the propeller operating mechanism or operating fluid for varying the propeller pitch, the fluid supply adapter 15A as shown in FIG. The fluid passages 19, 20 of the swing center shaft 13A are fluid passages 19a, 20a for lubricating the lower gear box 8, or fluid passages 19b, 19c, for operating the propeller pitch to vary the propeller pitch.
They are formed separately as 20b and 20c. In this case, the shaft casing 11A supplies the above-mentioned lubricating and operating fluid to the propeller operating mechanism in the lower gearbox 8.
Although not shown, according to each fluid passage 19, 20,
Formed into double or triple tubes.

The bearing 22 that supports the swing center shaft 13 shown in FIG.
1. It is provided so that when the swing center shafts 13 are unified and swing up around the axis of the swing center shafts 13, the swing up is performed smoothly. However, in the fluid supply adapter 15,
The swing center shaft 13 may be provided with a function of rotatably supporting the swing center shaft 13. Generally, the swing center shaft 13 is provided on the left and right sides of the shaft casing 11 as shown in the figure, but it may be provided on only one side if strength permits.

According to such a configuration, the propeller can be swung up without deteriorating the working environment as described below.

When swinging up the propeller 12 for inspection and maintenance, etc., the upper gear box 1
After removing the drive shaft 2 that is connected to Rotate it. At this time, since the swing center shaft 13 is rotatably supported by the bearing 22, the swing-up operation can be carried out smoothly. The swing center shaft 13 rotates relative to the fluid supply adapter 15, but the swing center shaft 13 rotates relative to the fluid supply adapter 15.
Since the six connected fluid supply adapters 15 maintain communication with the swing center shaft 13, the fluid does not leak and contaminate the area around the swing center shaft 13.

When inspection and maintenance are completed, the propeller 12 can be returned to its original state by swinging down the propeller 12 and connecting the drive shaft 2 to the upper gearbox 1. In addition, not only when inspecting and servicing the propeller, but also when stopping the oil barge for a long period of time, it is possible to swing up the fluid piping without removing it, as described above, to prevent the attachment of dirt and living things.

As can be seen from the above explanation, the swing central shaft is fixed perpendicular to the shaft casing, and the fluid supply adapter connected to the hydraulic unit is rotatably attached to this swing central shaft, so that there is no need to remove the fluid piping when swinging up the propeller. As a result, it is possible to prevent the fluid remaining in the fluid piping from leaking to the outside, contaminating the surrounding area and worsening the working environment. In addition, there is no need to remove and install the fluid piping as explained in the prior art section, so that the swing-up work can be reduced and the work time can be shortened.
The fluid piping can be a fixed structure using steel pipes that can withstand high pressure, and can form a hydraulic source for pitch change of the variable pitch propeller or a passage for high pressure oil such as lubricating oil. Since the passage is located at the center of the swing, no additional space is required during the swing.
The devices and mechanisms can be compactly organized,
The area near the propeller installation area can also be used as a separate work area.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram including a partial cross section of the swing type marine propeller of the present invention, FIG. 2 is a sectional view of a swing center shaft of a different form, and FIG. 3 is a schematic diagram of a conventional swing type marine propeller. 1... Upper gear box, 8... Lower gear box, 9... Propeller shaft, 10... Power transmission shaft, 11, 11A... Shaft casing, 12... Propeller, 13, 13A... Swing center shaft, 1
5, 15A...Fluid supply adapter, 17...Hydraulic unit, 18...Seal, 19, 19a-19
c, 20, 20a-20c...fluid passage, 21...
...Fluid piping.

Claims (1)

[Scope of claim for utility model registration] An upper gearbox, a lower gearbox, a shaft casing that connects both gearboxes, a power transmission shaft built into the shaft casing, a propeller shaft built into the lower gearbox, and , a propeller, and a fluid piping for supplying lubricating oil or hydraulic oil to the lower gearbox is fixed perpendicularly to the shaft casing in the swing type marine propeller provided in the shaft casing, and has a fluid passage inside. A swing center shaft with a
A swing type marine propeller characterized by being provided with a fluid supply adapter for supplying fluid from a hydraulic unit to a fluid passage in a swing center shaft.