JPH072393Y2 - Lubrication structure of idle propeller device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a free-running propeller device that effectively uses the wake of a thruster as a propulsive force by being rotationally driven by the wake of a screw thruster. More particularly, the present invention relates to a lubricating structure of a free-wheeling propeller device configured to supply lubricating oil to a bearing portion of a free-wheeling propeller shaft.

[Prior Art] An idle propeller device shown in Fig. 5 is a device for improving the propulsion efficiency in the field of ships.

The idling propeller device is formed by integrally forming a idling propeller shaft 3 coaxially with a screw shaft of the propulsion device 1 on a cast ladder horn 2 attached to a rear position of a screw propulsion device 1 at the stern. The idle propeller 6 is supported by the bearings 4 and 5, and the wake generated by the screw 7 by the idle propeller 6 having a blade diameter larger than that of the screw 7 is effective as the propulsive force of the hull. I was trying to collect it. Further, in order to supply the lubricating oil to the bearings 4 and 5, a series of lubricating oil passages 8 for supplying the lubricating oil to the bearings 4 and 5 are formed in the rudder horn 2 and the idling propeller shaft 3 to form the bearings. The rotation performance of 4 and 5 was kept good. Note that this type of proposal includes the applicant's "idling propeller device" (Japanese Patent Application No. 62-155414).

[Problems to be Solved by the Invention] However, forming a plurality of lubricating oil passages in a casting ladder horn by machining or casting as in the above proposal requires a lot of steps, so that a simple process is required. Therefore, it has been desired to propose a lubricating oil structure that can be connected to the lubricating oil passage of the idler propeller shaft.

[Means for Solving the Problems] In order to solve the above problems, the present invention defines a hole for drawing a flexible lubricating oil pipe of a hull in a rudder horn and connects a free-moving propeller shaft. In the forehead of the rudder horn, a pipe line that opens from the hole to the connection end of the idler propeller shaft is formed, and in the idler propeller shaft, a lubricating oil passage that faces the pipe line and opens to the bearing portion of the shaft is formed. A seal panel is formed so as to be watertightly fitted to the inner wall of the hole so as to seal the pipe line, and the hole of the seal panel is formed on the hole side face of the seal panel and the pipe line side face on the opposite side. Connecting pipe to which the first pipe joint and the second pipe joint are attached so as to be able to communicate with each other through the pipe, and the second pipe joint is fitted in the pipe passage side end of the lubricating oil passage in an oiltight manner. Connect the bases of the first fitting The flexible lubricating oil pipe is connected to.

[Operation] When the seal panel is watertightly fitted to the inner wall of the hole to seal the pipe passage, the connecting pipe integrated with the seal panel is fitted to the lubricating oil passage in an oiltight manner. When the flexible lubricating oil pipe is connected to the first pipe joint, the flexible lubricating oil pipe and the lubricating oil passage are communicated with each other via the connecting pipe.

[Embodiment] An embodiment of the present invention will be described below with reference to the accompanying drawings.

As shown in FIG. 3, a propulsion device 1 for generating a wake and advancing the hull 10 is attached to the underwater portion of the hull 10 on the rear side, and the hull 10 can be turned behind the propulsion device 1. A rudder frame 2 having a rudder 11 that is rotatable about a vertical axis is attached.

The ladder frame 2 is composed of a main body 11 extending in the water depth direction and a forehead 12 extending from the main body 11 to the propulsion device 1 side, and each has a streamline cross section with little resistance to water flow. It is integrally formed by casting.

As shown in FIG. 1, a free-wheel propeller shaft 13 that rotatably supports the free-wheel propeller 7 via bearings 4 and 5 is flange-connected to the tip of the front head 12. That is, the propeller 6 having a diameter larger than that of the screw 7 of the propulsion device 1 receives the wake generated outside the outer edge of the screw 7 and rotates by itself.
It is designed to generate a wake.

Now, in the embodiment, in the ladder frame 2, a pipe passage (hereinafter referred to as “first pipe passage”) 14 along the water depth direction is sectioned and formed in the main body portion 11, and the pipe passage is formed in the forehead 12. A pipe line (hereinafter, referred to as “second pipe line”) 15 orthogonal to 14 is defined. Then, a hole 15 which also serves as a working space is defined in the orthogonal portion.

The first pipeline 14 has a machine operating room (not shown) for the hull 10 described above.
Insert two flexible lubricating oil pipes 37, 38 for supplying / discharging the connection into a lubricating oil tank (not shown) inside. However, the pipe lengths of the flexible lubricating oil pipes 37 and 38 are set such that the ends thereof are located in the hole 16.

On the other hand, lubricating oil passages 17 and 18 for supplying / discharging lubricating oil to / from the bearings 4 and 5 at both ends are formed in the idler propeller shaft 13. In the embodiment, the lubricating oil passages 17, 18 are the front head 1
It is formed so as to be opened on the shaft from the connecting portion with 2 and open on the shaft surface near each of the bearings 17 and 18. That is, the shaft hole 20 formed in the boss 19 of the idler propeller 6 and the idler propeller shaft
A series of lubricating oil chambers 21 and 22 are defined between the shaft surface of 13 and
The lubricating oil supplied from one lubricating oil passage 17 is returned to the other lubricating oil passage 18.

On the other hand, a seal panel 24 for watertightly sealing the second piping 15 is fitted on the inner wall 23 of the hole 16 by a spigot fitting, and is integrally fixed by a bolt (not shown). However, packing (not shown) such as an O-ring is provided around the spigot portion of the seal panel 24.

In the embodiment, plugs 25 and 26 are coaxially attached to the front and rear and coaxially to the seal panel 24 as shown in FIG. Lubricating oil passages 17 for connecting / distributing the ends of the lubricating oil pipes 37, 38 and being housed in the second pipe passage 15 by the plug (second pipe joint) 26 on the opposite side for supplying / discharging the idler propeller shaft 13 The other end of the connecting pipe 27 that is oil-tightly and insertably / removably fitted to the ends of the pipes 18, 18, that is, the introduction end and the discharge end, is connected.

Therefore, the seal panel 24 with the connecting pipe 27 connected
Is fixed to the inner wall 23 of the hole 16, the lubricating oil passages 17 and 18 and the connecting pipe 27 are joined at the same time, and when the flexible lubricating pipes 37 and 38 are further connected, a series of supply and discharge of lubricating oil is performed. The system is constructed.

By the way, at both ends of the connecting pipe 27, O-rings are fitted on the outer peripheral surfaces of the connecting pipes 27 so as to obtain a certain oil tightness.
Sealing bearings 28 are provided on both sides of 4,5 to secure a seal against seawater by applying a pressure of a lubricating oil for sealing to maintain watertightness.

As described above, when the rudder horn 2 and the idler propeller shaft 13 are separately formed, a great degree of freedom is created in forming the lubrication supply system.

That is, when the flexible lubricating oil pipes 37, 38 are drawn into the holes 16 in the ladder horn 2 and the seal panel 24 is watertightly fitted and fixed to the inner wall 23, the idle propeller shaft of the connecting pipe 27 of the seal panel 24 is fixed. The end portion on the 13 side is oil-tightly fitted to the lubricating oil passages 17 and 18 in the idling propeller shaft 13. That is, the connecting panel 27 is integrally engaged with the seal panel 24, the seal panel 24 and the connecting tube 27 are previously integrated, and when the seal panel 24 is fixed to the inner wall 23, the other connecting tube 27 Propeller shaft 13 with idle end
It can be connected simultaneously with the lubricating oil passages 17 and 18 inside.

Therefore, it is possible to form the lubricating oil passage without requiring any skill or special experience.

In FIG. 4, a male plug 29 is attached to the inner end of the hole of the flexible lubricating oil pipe, and the plug 29 is attached to the seal panel 24.
9 shows an example of screwing with a female plug 30 integrated with.

[Effect of the Invention] As is clear from the above description, the present invention exhibits the following excellent effects.

A lubricating oil passage for lubricating oil to circulate in the bearing of the idler propeller shaft can be easily formed in the rudder horn.

[Brief description of drawings]

1 is a sectional view showing a preferred embodiment of the present invention, FIG. 2 is a partial sectional view showing a connecting state of a flexible lubricating oil pipe and a connecting pipe, and FIG. 3 is a mounting of a propeller and a free-running propeller. FIG. 4 is a schematic sectional view showing the positional relationship, FIG. 4 is a partial sectional view showing another connection state of the flexible lubricating oil pipe and the connecting pipe, and FIG. 5 is a sectional view showing a conventional example. In the figure, 2 is a rudder horn, 10 is a hull, 13 is an idler propeller shaft, 16 is a hole, 17 and 18 are lubricating oil passages, 24 is a seal panel, 27 is a connecting pipe, and 38 and 39 are flexible lubricating pipes. Is.

Claims (1)

[Scope of utility model registration request] 1. A hole for drawing a flexible lubricating oil pipe of a hull is formed in a ladder horn, and a pipe passage is formed in the forehead of a rudder horn for connecting an idler propeller shaft to the connecting end from the hole. Then, a lubricating oil passage is formed inside the idler propeller shaft so as to face the pipe passage and open to the bearing portion of the shaft, and a seal is provided so that the pipe passage can be watertightly fitted to the inner wall of the hole to seal the pipe passage. A panel is formed, and on the hole side surface of the seal panel and the side surface of the pipe path on the opposite side,
The first pipe joint and the second pipe joint are attached so as to be able to communicate with each other through the holes of the seal panel, and the second pipe joint can be inserted into and removed from the end of the lubricating oil passage on the pipe passage side and is oil-tight. A lubrication structure for a free-running propeller device, characterized in that a base portion of a fitting pipe to be fitted is connected, and the flexible lubricating oil pipe is connected to a first pipe joint.