JPH011692A - Protection device for stern tube packing of propeller-driven vessels - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a protection device for the stern tube packing of a propeller-driven vessel of the type defined in the preamble of the first claim.

Protective covers are already known as such protective devices (German Applications Nos. 1,120,921 and 1,183,399). The relatively narrow space between the stern tube packing and the propeller boss prevents steel cables and thick rigging from penetrating, so the stern tube packing can be sufficiently protected against steel cables and thick rigging. The thin strands are carried by the propeller-generated water current through the ring-shaped gap and into the protective canopy, where they wrap around the propeller shaft and eventually damage critical parts of the stern tube packing by entangling the strands. There is a risk.

In order to avoid the above-mentioned damage, an improvement proposal has already been proposed in which the protective cover is not fixed to the stern tube, but is connected to the propeller boss and rotated together with the propeller boss (German patent specification). No. 313669). In this case, the string is wrapped around a protective sheath that acts like a capstan, so that the stern tube packing is not damaged.

This known protection device is certainly effective against relatively thin cord-like objects, but when thick rigging or steel ropes are wrapped around them, the propeller becomes stuck and cannot be moved, resulting in destruction of the machine. There is a risk that

The present invention eliminates the above-mentioned undesirable situation, i.e., even if a relatively thin string can penetrate through the annular gap, it will not damage the stern tube packing. The object of the invention was to provide a protection device for the stern tube packing, which is of such a form that it cannot be caught in the stern tube packing, and on the other hand cannot be caught in thick rigging.

This problem is solved according to the invention by arranging a ring concentric with the propeller boss and having a U-shaped cross section in the cavity between the stern tube and the propeller boss, inside the protective cover, in which case the opening of the U-shaped ring is radially outwardly located and further connected to the ring-shaped gap so as to be able to catch and swipe the end of a fishing line, fishing net, or similar string that enters through the ring-shaped gap. In connection, it is solved by design arrangement.

By implementing such measures, the above-mentioned problems can be solved, and at the same time, the capacity of the U-shaped ring is quite large, so that it can be operated for long periods of time, usually for more than one docking period. , a large amount can be involved.

Remove string-like objects that are tangled in the U-shaped ring each time the dock is docked. By the way, even if a string-like object becomes tangled in the U-shaped ring before the scheduled time,
Since this acts as a dam against the ring-shaped gap, new entanglement is prevented, and at the same time, the entangled string-like material is torn off, so the protection device does not stop functioning.

In one embodiment of the protection device of the invention, if the protective cover is arranged with a relatively small gap between the propeller bosses, the leg of the U-shaped ring on the propeller side It is firmly attached to the front,
It takes the form that the other leg projects into the space between the stern tube and the propeller hub, leaving a space between its end and the protective cover. section).

According to this embodiment, the idea of the present invention can be realized extremely easily and at low cost.

Another embodiment is provided if the protective cover is arranged with a relatively large air gap between it and the propeller boss. That is, in this embodiment, the U-shaped ring or the spacer is used to shift an appropriate distance in the direction of the protective cover (claim 3), in which case the spacer is displaced from the U-shaped ring. (claim 4) in which the spacer consists of a radially inwardly projecting ring flange; or in the latter case, the spacer consists of an extension of the leg of the U-shaped ring on the stern tube side; The extension extends to the protective sheath and is fixed there, while in the latter case the other leg of the U-shaped ring is arranged at an axial distance relative to the propeller boss. , a ring concentric with the propeller boss is firmly attached to the propeller boss, and this
The shaped ring protrudes into the gap between the propeller side leg and the protective cover (Claim 5).

Next, the object of the present invention will be clarified based on the embodiments shown in the drawings.

In FIG. 1, (1) represents the stern tube packing, which is designed as a double-tongue packing, these tongues (1) interacting with bushes (3). The bushing (3) is mounted on the propeller shaft (4),
One is fixedly connected to the propeller boss (5) through the flange (3a), and the other is fitted into the stern tube (6).

The void created here (7) is a tubular protective cover (8)
surrounded by. One end of the protective cover (8) is firmly connected to the stern tube (6), and the other end is opposed to the propeller boss (5). In this case, the propeller boss (5
) has a cylindrical step part (11) at this location,
A ring-shaped gap (9) is provided between this and the protective covering.

('j, the void (7) formed by the protective cover (8)
There is a U-shaped ring (10) concentric with the propeller boss (5) inside.
) are placed. The U-shaped ring (10) is open toward the outside, that is, toward the protective cover (8), and its propeller boss side leg (10a) is firmly fixed to the front surface of the propeller boss (5). There is.

In that case, the outer end surface of the leg is located approximately in the same position as the cylindrical stepped portion (11) of the propeller boss (5). The dimensions of the U-shaped ring (1,0) are also such that fishing lines, fishing nets or similar leaf-shaped objects entering through the ring-shaped gap can be forced into the recess in multiple layers.

In FIG. 2, the stern tube packing section is the same as in the embodiment shown in FIG. An embodiment is shown in which the size is large.

In this embodiment, the U-shaped ring (1o) is provided with a ring flange-like extension (12). This extends radially inward in contact with the leg (10a) of the U-shaped ring on the propeller boss side, and functions as a fixing part of the U-shaped ring to the propeller boss (5). Extension (
The length of 12) is set so that the ring-shaped gap (9) can be reduced to the required width. ' FIG. 3 shows an embodiment of the protection device in which the ring-shaped gap is relatively wide, as in the case of FIG.

In this embodiment, the U-shaped ring (1o) is not fixed to the propeller boss (5), but to the protective cover (8). That is, the leg (10b) of the U-shaped ring (8) on the stern tube side extends to the protective cover (8) and is fixedly connected there. In this case, a ring (13) different from the U-shaped ring (10) is fixed to the propeller boss (5>.
5) and a concentric ring projecting into the cavity formed between the propeller leg (10a) of the U-shaped ring (10) and the protective cover (8). This ring then acts as a rotating part.

[Brief explanation of drawings]

FIG. 1 shows an embodiment according to claim 2, and is a longitudinal sectional view thereof. The second embodiment is a longitudinal cross-sectional view of the fourth embodiment. FIG. 3 shows an embodiment according to claim 5, and is a longitudinal sectional view thereof. (1)・・・・・・・・・・・・・・・Stern tube packing (3)・・・・・・・・・・・・・・・Button (4
)・・・・・・・・・・・・・・・Propeller shaft (5)・
・・・・・・・・・・・・・・・Propeller Poss (6)・・
・・・・・・・・・・・・Stern tube (7)・・・・・・
・・・・・・・・・Blank (8)・・・・・・・・・・・・
・・・Protective cover (9)・・・・・・・・・・・・・・・
・Ring-shaped void (10)・・・・・・・・・・・・・
・・U-shaped ring (11)・・・・・・・・・・・・・
...Cylindrical step part FIG, 3

Claims (5)

[Claims] (1) A cavity is provided between the stern tube and the propeller boss, and this cavity is covered with a tubular protective cover concentric with the propeller boss, a so-called rope guard, in which case the protective cover In a protection device for the stern tube packing of a propeller-driven ship, which is fixed to the stern tube and on the other hand overlies the propeller boss with a ring-shaped gap, the protection within the space between the stern tube and the propeller boss. A ring of U-shaped cross section is arranged inside the canopy, concentric with the propeller boss, the U-shaped ring being arranged with its opening pointing radially outward; The protective device is further characterized in that it is designed and arranged in relation to the ring-shaped gap in such a way that it can catch and wind up the end of a fishing line, fishing net or similar string-like object entering through the ring-shaped gap. . (2) When the protective cover is placed with a relatively small gap between the propeller boss and the U-shaped ring,
The leg on the propeller side is rigidly attached to the front of the propeller boss, the other leg projects into the space between the stern tube and the propeller boss, with no space between its end and the protective cover. 2. The protection device according to claim 1, wherein a void is left. (3) When the protective cover is arranged with a relatively large gap between it and the propeller boss, make sure that the U-shaped ring is shifted an appropriate distance in the direction of the protective cover using a spacer. Protective device according to claim 1, characterized in that: 4. Protective device according to claim 3, characterized in that the spacer comprises a ring flange projecting radially inwardly from the U-shaped ring. (5) The spacer consists of an extension of the stern tube-side leg of the U-shaped ring, which extension extends to the protective canopy and is connected there to the protective canopy, and the other U-shaped
The other leg of the shaped ring is placed at a distance in the axial direction from the propeller boss, and a ring concentric with the propeller boss is firmly attached to the propeller boss, which forms the U-shaped ring. 4. The protection device according to claim 3, wherein the protection device projects into the gap between the propeller-side leg of the device and the protective cover.