JP6840667B2 - Protective device for propeller-driven ship stern tube sealing device - Google Patents

Description

In the present invention, an intermediate chamber is provided between the stern tube and the propeller hub, and the intermediate chamber is covered with a tubular protective peripheral wall (rope guard) concentric with the propeller hub. On the one hand, it is immovably fixed to the stern tube, and on the other hand, it surrounds the propeller hub, leaving a ring gap, and is concentric with the propeller hub inside the protective peripheral wall in the intermediate chamber between the stern tube and the propeller hub. For a propeller-driven stern tube sealing device of a propeller-driven ship in which a ring formed in a U-shape when viewed in a radial cross section is arranged, and the U-shaped opening of the ring is directed outward in the radial direction. Regarding the protective device of.

Such a type of protective device is known based on German Patent Invention No. 3718419 (DE 37 18 419 C2). According to this specification, the ship is equipped with a net zschutz to protect the stern tube sealer and the stern tube support device. This net protection device is often flanged directly to the drive propeller. If the nets and ropes are underwater, they will be rolled up by the U-shaped geometry of the preventive device and will be U until docked, that is, until the nets and ropes are removed at the time of docking. It is housed within the glyphic component.

The ring then relates to the ring gap as follows, i.e., so that the end of the fishing line, fishing net or similar string, which may possibly enter through the ring gap, is captured and rolled up by the ring. Arranged and dimensioned.

Due to the large diameter of the ring in question, the material used (often aluminum bronze is used for it), the manufacturing method and the processing, relatively high costs are incurred, and such costs are the cost of the ship. It often makes the operator feel like giving up the net protection device. In addition, there is the problem of heavy weight, which makes the handling, installation and maintenance of the ring difficult. Of course, abandoning the net protection device, the ring mentioned above, represents a great danger of ship drive.

In order to attach the net prevention device, or ring, with screws, a hole pattern in the ring is required for flange coupling, and this hole pattern varies depending on the ship or the use of each. Therefore, holes are formed immediately prior to delivery or installation of the net protection device in connection with the use case.

An object of the present invention is to improve the protective device for the stern tube sealing device of a propeller-driven ship of the type described at the beginning to eliminate the above-mentioned drawbacks. Therefore, it is desired to provide a solution that is easy to handle and has a high cost-effectiveness. As a result, it is desirable that the net prevention device can be easily manufactured and installed.

The configuration of the present invention that solves this problem is characterized in that the ring, at least in part, is made of a material that can be pouring viscous at room temperature (T = 20 ° C.). Such materials preferably include concrete, especially mineral casts.

The ring preferably consists of at least two ring sectors, where each ring sector extends over a fixed peripheral angle and the ring sectors are preferably coupled to each other. At this time, particularly preferably, two, three, four, five or six ring sectors forming a ring are provided.

Further, the ring sectors may be oriented relative to each other using a centering element, i.e., the centering elements are preferably complementary variants of the circumferentially oriented end region of the ring sector. Formed from the part.

The ring or the ring sector is secured to the propeller hub or protective peripheral wall, preferably using a threaded joint. At this time, preferably, an insertion member penetrated by at least one screw is arranged in the ring or the ring sector. At this time, the insertion member is preferably at least partially surrounded by the material of the ring.

The material preferably consists of a filler and a binder and optionally an additive, wherein the filler preferably has a weight ratio of 80% to 95% and the binder is preferably 5. It has a weight ratio of% to 20%, and the binder is preferably composed of a resin, particularly an epoxy resin, and a curing agent, particularly an amine-based curing agent. All components of the material are 100% by weight combined.

Further, reinforcing fibers, particularly glass fibers, carbon fibers or mineral fibers may be added to the material.

As already mentioned, reinforcing fibers may be added to the material of the ring. In addition to the fibers mentioned above, the reinforcing fibers include steel wire rods, netting materials, reinforcing iron, cages, steel woven fabrics and similar elements that are also used in ordinary concrete. Furthermore, a woven fabric may be inserted in the material.

Concrete is a mixture consisting of cement, aggregate and mixed water, and in some cases also contains concrete additives and concrete admixtures. Cement acts as a binder to bond other components. The strength of concrete is expressed by the crystallization of the clinker component of cement in the state of absorbing water.

In order to obtain fiber reinforced concrete, fibers made of steel, plastic, carbon or glass can be added to the concrete.

Mineral cast (also called polymer concrete), unlike ordinary concrete, contains a polymer, a plastic material, as a binder that binds aggregates together. Cement is used in mineral casts at best as a filler and does not undertake binding action. The most widely known polymer matrix for mineral casting is unsaturated polyester resin.

Mineral cast has significantly better mechanical and chemical properties than cement concrete in its field of use. The gelation time of these resins can be adjusted by the amount of catalyst and curing agent used. Epoxy resins are used as polymers, i.e. as binders, to exhibit good vibration buffering properties.

In general, all materials that can be cast "at room temperature (kalt)", that is, materials that can have a viscous property that can be poured at room temperature (20 ° C), to realize the proposed idea. Can be used.

The present invention therefore provides an effective net protection device for ship drives, especially consisting of mineral casts. At this time, the ring may be integrated or may consist of a plurality of segments. In sectors (or segments), a wide variety of split geometric shapes can be realized to facilitate the precise joining of multiple sectors to form a single complete ring. However, accurate coupling does not mean much to function.

Holes for fixing the ring or the sector of the ring can be cast together at the time of manufacture. Also at this time, insert members (inlays) made of various materials (for example, special steel, brass, bronze, aluminum, GFK, CFK or plastic) are used. be able to. The inlay can have a wide variety of shapes and acts to transfer force from the screw, preventing spalling of the mineral cast. In addition, inlays such as threaded bushes and threaded bolts can be cast together.

In order to consider the changing pore pattern and to allow this to be covered by one template as much as possible, the approaches described below exist:
On the one hand, long-hole inlays have been found to be suitable. Such inlays can be provided straight or bent into a kidney shape (ie, with or without a radius in the circumferential direction). Such inlays can be inserted into the mineral cast and in particular cast.

The inlay may be formed as an inlay of solid material. Such inlays are in this case made from solid materials (eg bronze, brass, specialty steels, plastics) that are cast together during the casting of the ring or ring sector. The hole pattern can then be formed by drilling directly into the inlay of the solid material at the request of the customer after demolding the ring or ring sector from the mold. Such inlays need to have a suitable geometry to ensure that they can be fixed within the mineral cast.

Eccentric inlays are also possible. Holes are eccentrically formed in such an inlay, i.e. the inlay may be formed in the form of a plain bearing. By rotating part of the inlay, the position of the hole can be changed to fit the required connection geometry.

The density of mineral cast is about 1/4 of the density of aluminum bronze (which is 8.6 g / cm ^3). Therefore, there is a significant weight reduction, which in turn provides advantages in handling and mounting the ring or its sectors. Combined with segmentation, the handling and mounting advantages are enhanced. And now it can be installed by hand. This saves the use of cranes, lifts and mounting devices and reduces time consumption.

The variety of changes remains for the end user, but has been significantly reduced for the ring makers. By forming the inlays described above, it is possible to work with only one mold and nevertheless completely cover and reproduce a wide variety of pore patterns. As a result, cost and time can be saved.

Therefore, by using mineral cast instead of the conventional material aluminum bronze, a considerable cost advantage can be obtained.

Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 5 is a radial cross-sectional view showing a protective device for a stern tube sealing device of a ship driving device provided with a net prevention device formed as a ring. It is a radial sectional view which shows the ring (net prevention device) by 1st Embodiment of this invention. FIG. 2 is a cross-sectional view and a front view in the radial direction of the ring shown in FIG. FIG. 5 is a radial cross-sectional view showing a ring according to another embodiment of the present invention. FIG. 5 is a radial cross-sectional view showing a ring according to another embodiment of the present invention. It is a front view which shows the ring sector which is the component part of the ring by another embodiment of this invention. It is a front view which shows the four ring sectors shown in FIG. 6 which form a ring together. 8a, 8b and 8c are views showing the abutment points of two ring sectors adjacent to each other at one peripheral part of the ring as viewed from the radial direction immediately before the connection. FIG. 5 is a radial cross-sectional view showing a ring according to another embodiment of the present invention. FIG. 5 is a radial cross-sectional view showing a ring according to another embodiment of the present invention. It is a front view which shows the ring which the insertion member is shown. It is a front view which shows the ring which shows two long holes for fixing. FIG. 5 is a front view showing a ring showing an eccentric insert for fixation.

FIG. 1 shows a stern tube sealing device 1, which is formed as a plurality of lip sealing devices and has a plurality of sealing lips 13. These seal lips. 13 cooperates with the bush 14 attached to the propeller shaft 15. The bush 14 is connected to the propeller hub 3 via a flange 16 at one end, and enters the stern pipe 2 at the other end.

The intermediate chamber 17 formed thereby is covered with a tubular protective peripheral wall 4, which is immovably fixed to the stern tube 2 on one side and a propeller hub on the other side. 3 is slightly protruding while leaving the ring gap 5.

A U-shaped ring 6 concentric with the propeller hub 3 is arranged in the intermediate chamber 17 formed by the protective peripheral wall 4, and the ring 6 is radially outward, that is, toward the protective peripheral wall 4. It is open and fixed to the end face of the propeller hub 3 using simply the threaded joints 8 outlined. At this time, the size of the ring 6 is such that the ring 6 accommodates a large number of winding layers such as a fishing line end portion and a fishing net end portion that invade the ring gap 5 in the accommodation chamber formed by the U-shaped structure. Selected to be able to. This protects the stern tube sealing device 1.

For details, refer to German Patent Invention No. 3718419 (DE 37 18 419 C2) already mentioned above.

Importantly, the ring 6 is made of material B, at least in part, according to the invention, which can have a pouring viscosity at room temperature (T = 20 ° C.). Mineral cast is especially conceivable here.

FIG. 2 shows the ring 6 in a radial cross section. As can be seen from FIG. 2, a hole 10 is formed in the ring 6, whereby the ring 6 can be fixed to the propeller hub 3 by using a screw 8. For mounting, a mounting hole 18 is provided so as to match the hole 10, and the mounting hole 18 is provided for passing a corresponding tool.

As can be seen from FIG. 3, the ring 6 may be formed as an integral member.

A metal insertion member 9 is preferably inserted into the hole 10, or the insertion member 9 can be placed in a mold during casting of the ring 6, thereby fixing the ring 6. Stable holding can be guaranteed. In particular, spalling of the material of the ring 6 can be avoided. Two different solutions are shown here in FIGS. 4 and 5.

As can be seen from FIGS. 6 and 7, the ring 6 may consist of a plurality of sectors 6 ″, 6 ″, 6 ″ ″, 6 ″ ″, each covering one circumferential portion.

Centering elements 7 may be provided so that the individual sectors are accurately aligned with each other in the circumferential direction and positioned in the axial direction a (see FIG. 1), and the three centering elements 7 are provided. Different forms of variation are shown in FIGS. 8a, 8b and 8c. Thereby, the exact axial assembly of the ring sectors 6 ″, 6 ″ can be improved by the procedures shown herein.

Here, a transition region between the ring sectors 6 ″ and 6 ″ is shown, and a diagram viewed from the radial direction at this time is outlined. As can be seen from the three illustrations in FIGS. 8a, 8b and 8c, the abutments are not formed flat, but at an angle or at an angle (see FIG. 8a) or as shown by an arrow. (See FIGS. 8b and 8c) formed. The two possibilities described below ensure the exact axial coupling of the two ring sectors 6', 6'' that are butted against each other, so that when assembling the ring sectors, the individual parts are placed exactly together. ..

This provides better assembly potential, especially in just two segments or sectors. In addition, there is a simple possibility of centering the sectors relative to each other.

In FIG. 9, the insertion member 9 that was cast together with the ring 6 or its sector during casting is illustrated again. FIG. 10 then shows that the insertion member 9 is perforated through, which allows the ring 6 to be fixed by a desired hole pattern.

Further, FIG. 11 shows that an insertion member 9 which has a plurality of different holes and enables screw fixing of the ring 6 within a frame having a certain changeability can be provided. There is.

This changeability is further enhanced by the provision of elongated holes 11, as can be seen in FIG. 12, which are here formed in the shape of a kidney and the ring 6 is relatively easily screwed in. It makes it possible to be.

FIG. 13 shows yet another possibility, in which the insertion member formed as the eccentric inserter 12 is provided. The eccentric insert 12 is formed in the form of a plain bearing and has two rings that can rotate relatively (see the arrow in FIG. 13). Thereby, the rotation of the inner ring of the eccentric inserter 12 can change the position of the through hole for the screw and can be aligned with the threaded hole in the propeller hub 3.

1 Stern pipe sealing device 2 Stern pipe 3 Propeller hub 4 Protective peripheral wall (rope guard)
5 Ring gap 6 Ring 6'Ring sector 6'' Ring sector 6'''Ring sector 6'''' Ring sector 7 Centering element 8 Threaded joint 9 Insert member 10 Hole 11 Long hole 12 Eccentric inserter 13 Seal lip 14 Bush 15 Propeller shaft 16 Flange 17 Intermediate chamber 18 Mounting hole B Material (mineral cast, polymer concrete)
a Axial direction

Claims (9)

An intermediate chamber is provided between the stern tube (2) and the propeller hub (3), and the intermediate chamber is covered with a tubular protective peripheral wall (4) concentric with the propeller hub. (4) is immovably fixed to the stern tube (2) on the one hand, and surrounds the propeller hub (3) on the other hand while leaving a ring gap (5). A ring (6) formed inside the protective peripheral wall (4) in the intermediate chamber between the propeller hub (3) and the propeller hub (3), which is concentric with the propeller hub (3) and has a U-shape when viewed in a radial cross section. ) Is arranged, and the U-shaped opening of the ring (6) is directed outward in the radial direction, and is a protective device for the stern tube sealing device (1) of a propeller-driven ship.
The ring (6), at least in part, is made of a material (B) capable of having a pouring viscous property at room temperature (T = 20 ° C.) .
The material (B) is composed of a filler, a binder, and an additive, wherein the filler has a weight ratio of 80% to 95%, and the binder has a weight ratio of 5% to 5%. A protective device for a propeller-driven ship stern tube sealing device (1) , which has a weight ratio of 20% and is characterized in that the binder is composed of a resin and a curing agent. The protective device according to claim 1, wherein the material (B) is concrete. The ring (6) is composed of at least two ring sectors (6', 6'', 6''', 6''''), and each ring sector (6', 6'', 6 is at this time. ''', 6'''') extend over a fixed peripheral angle, and the ring sectors (6', 6'', 6''', 6'''') are joined together. The protective device according to claim 1 or 2. 3. Claim 3 in which two, three, four, five or six ring sectors (6', 6'', 6''', 6'''') form the ring (6). The protective device described in. The ring sectors (6', 6'', 6''', 6'''') are positioned with each other using the centering element (7), and the centering element (7) is the ring sector (7). 6', 6'', 6''', 6''''), claim 3 or 4, which is formed from mutually complementary dysmorphic portions of the circumferentially oriented end regions. Protective device. The ring (6) or ring sector (6', 6'', 6''', 6'''') uses the threaded joint (8) to form the propeller hub (3) or the protective peripheral wall (3). The protective device according to any one of claims 1 to 5, which is fixed to 4). An insertion member (9) penetrated by at least one screw (8) is arranged in the ring (6) or the ring sector (6', 6'', 6''', 6''''). The protective device according to claim 6. The protective device according to claim 7, wherein the insertion member (9) is at least partially surrounded by the material (B) of the ring (6). The protective device according to any one of claims 1 to 8 , wherein reinforcing fibers are added to the material (B).

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