KR20170088831A - Protective device for the sealing of a stern tube of propeller-driven ships - Google Patents

Abstract

The present invention relates to a protection device for a stern tube seal (1) of a propeller-driven vessel, wherein an intermediate space is provided between the stern tube (2) and the propeller hub (3) 3 are covered by a tubular protective cover 4 concentrically arranged. The protective cover 4 is fixed at one end to the stern tube 2 and at the other end to the propeller hub 3 to form an annular gap 5 concentric with the propeller hub 3, Shaped ring 6 is arranged in the intermediate space between the propeller hub 3 and the stern tube 2 in the protective cover 4 and the U-shaped ring 6 is arranged in the radial direction And is opened toward the outside. It is an object of the present invention to provide an easily adjustable and cost-effective solution. In order to realize the above object, according to the present invention, the ring 6 is characterized in that it at least partially contains a material (B) that can be uniformly poured at room temperature (T = 20 DEG C).

Description

[0001] PROTECTIVE DEVICE FOR THE SEALING OF A STERN TUBE OF PROPELLER-DRIVEN SHIPS [0002]

The present invention relates to a protection device for a stern tube seal of a propeller-driven vessel, wherein an intermediate space is provided between the stern tube and the propeller hub, the intermediate space comprising a tubular protective cover (rope guard) concentrically arranged on the propeller hub, Wherein the protective cover is fixed to the stern tube at one end and is coupled to the propeller hub at the other end to form an annular gap, wherein the ring concentric with the propeller hub and having a U-shaped radial section is protected In the cover is arranged in the intermediate space between the propeller hub and the stern tube, and the U-shaped ring is opened radially outward.

A protection device of the type described above is described in DE 37 18 419 C2. According to the protection device, a net guard is provided on the ship to protect the stern tube seal and the stern tube bearing. The net guard is generally a flange mounted directly on a drive propeller. Since the net and the rope are located in the water they are wounded up due to the U-shaped geometry of the guard and remain in the U-shaped design until repaired, And the rope are removed.

The ring is arranged so that the end of a fishing line, fishing net or similar cord-like structure capable of passing through an annular gap is caught and wound by the ring and the numerical value for the annular gap It is dimensioned.

Because of the large diameter of the ring, the material used (for this purpose, mainly aluminum brass is used), the manufacturing method, and the process are relatively expensive, often causing the operator of the vessel to remove the net guard. In addition, the weight of the ring is large and it is complicated to handle, install and maintain the ring. Of course, removing the net guard, or removing the ring, poses a major threat to the propulsion of the ship.

A hole pattern is required to mount a flange on the ring to connect the rope guard, or ring, using a screw, which depends on the use of the vessel or vessel. Therefore, depending on the use of the vessel, the bore is inserted just before the net guard is installed or delivered.

It is an object of the present invention to develop a protection device for a stern tube seal of a propeller-driven vessel of the type described above, which solves the disadvantages of the prior art. Thereby, an easily handled and cost-effective solution is provided. Thus, the fabrication and installation of a net guard can be simplified.

According to the invention, the object solution is characterized in that the ring at least partly comprises a material which is consistently pourable at room temperature (T = 20 DEG C). Concrete, especially mineral casting, is preferred.

The ring includes two or more ring sectors, each ring sector extending over a predetermined circumferential angle, and the ring sectors are preferably interconnected. In particular, two, three, four, five or six ring sectors preferably form a ring.

The ring sectors may be aligned with respect to each other using a centering element, which is preferably formed by complementary profiling the end regions of the ring sector, The end regions are arranged in a peripheral direction.

The ring or ring sector is preferably attached to the protective cover or propeller hub using a screw connection. It is preferred that the insert parts are arranged in the ring sector and the insert parts are inserted by one or more screws. The insert portions are preferably at least partially surrounded by the material of the ring.

The material preferably comprises a filler material and a binder and, optionally, an adhesive, wherein the filler preferably has a weight proportion of between 80% and 95%, and the binder preferably comprises 5% % To 20% by weight, the binder preferably comprising a resin, in particular an epoxy resin and a curing agent, in particular an aminic hardener. All components of the material together constitute 100% by weight.

In addition, reinforcing fibers, particularly glass fibers, carbon fibers, or metal fibers, may be added to the material.

The above-mentioned reinforcing fibers can also be added to the ring. In addition to these fibers, steel bars, meshes, reinforcing iron, cages, steel meshes, and similar elements, such as normal concrete, But it is understood that it includes the elements used. In addition, the mesh may be incorporated into the material.

The concrete may be a mixture of cement, aggregate, and mixed water, and optionally, a concrete additive and a concrete admixture. Cement functions as a binder to fix other ingredients. The strength of the concrete is formed by the crystallization of the clinker of the cement under water absorption.

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

Compared to standard concrete, mineral castings (referred to as polymeric concrete) incorporate polymers or plastic materials as binders to fix aggregates together. Only cement is used as a filler in mineral casting, which is considered to have no binding effect. The most widely used polymer matrix for mineral casting is understood as polymer resin.

In applications, mineral concrete has significantly better mechanical and chemical properties than cement concrete. The setting time of such a resin can be set by the amount of the curing agent and the catalyst to be used. In order to produce excellent vibration-damping behavior, it is preferred that an epoxy resin be used as the polymer, i.e. as a binder.

In general, any material capable of cold casting, i. E. Uniformly pouring at room temperature (20 DEG C), can be used.

Thus, the present invention provides an efficient net guard for marine propulsion, especially made from minerals casting. Here, the ring may be formed integrally or may be segmented. In order to precisely connect sectors to form a complete ring, variously separated geometries can be implemented in sectors (or segments), but in function, precise connections are not so important.

Bores for attaching ring or ring sectors can be cast together during fabrication. An inlay part (inlay) formed of various materials (e.g., stainless steel, brass, bronze, aluminum, glass fiber, carbon fiber reinforced plastic, or plastic) may also be used. The inlay portions can be designed differently and are used to transmit force from the screws and prevent mineral casting from breaking. In addition, additional inlay portions, such as thread-bushing and thread-bolts, can also be cast together.

To change the bore pattern and treat it as only one mold, the following method is provided:

First, slot-inlay proved to be successful. Such an inlay may be provided in a straight line or may be provided in a kidney-shaped bent state (i.e., in a form with or without a radius in the peripheral direction). They are inserted into mineral castings and can be cast especially.

In addition, the inlay may be configured as a solid-material inlay. In this case, the inlay is made of solid material (e.g., bronze, brass, stainless steel, plastic); The inlay is cast together during casting of the ring or ring sector. Then, after removing the ring or ring sector from the mold, the hole pattern can be inserted directly into the solid-material inlay, by drilling according to consumer requirements. These inlays should have appropriate geometric shapes to secure them securely to mineral castings.

An eccentric inlay is also possible. The bore is eccentrically introduced into the eccentric inlay: such an inlay may be constructed in a sliding bearing manner. By turning one part of the inlay, the position of the bore can be changed and thus fit into the geometry of the required connection.

The density of mineral casting is only about 1/4 of the density of aluminum bronze (8.6 g / cm ³ ). Significant weight reduction and consequent advantages in handling and installation of ring or ring sectors. By combining segmented segments, the benefits of handling and installation of such ring or ring sectors increase. Now, manual installation is possible. This eliminates the need to use crane, lifting and assembly tools and reduces time-consuming.

Various variations for the end user are maintained, but are significantly reduced for ring makers. By inserting the above mentioned inlay, it is possible to work with only one mold, but it is nevertheless possible to repeat the entire range of different hole patterns. As a result, cost and time savings are possible.

Thus, the use of mineral casting instead of aluminum bronze as a material results in significant cost advantages.

Representative embodiments of the invention are illustrated in the drawings.
1 is a radial cross-sectional view of a protective device for a stern tube seal of a marine drive including a net guard in the form of a ring,
2 is a radial cross-sectional view of a ring (net guard) according to a first embodiment of the present invention,
Figure 3 is a radial cross-sectional view and front view of the ring according to Figure 2,
4 is a radial cross-sectional view of a ring according to a further embodiment of the present invention,
5 is a radial cross-sectional view of a ring according to a further embodiment of the invention,
Figure 6 is a front view of a ring sector, which is a component of a ring according to a further embodiment of the present invention;
FIG. 7 is a front view of four ring sectors according to FIG. 6, in which the four ring sectors together form a ring,
8A, 8B and 8C show a radial perspective view of the joints of two adjacent ring sectors, immediately before encountering at a peripheral point of the ring,
Figure 9 is a radial cross-sectional view of a ring according to a further embodiment of the invention,
Figure 10 is a radial cross-sectional view of a ring according to a further embodiment of the invention,
11 is a front view of the ring in which the inlay part is shown,
Figure 12 is a front view of a ring with two slots shown for clarity,
Figure 13 is a front view of a ring in which an eccentric insert is shown for attachment.

In Fig. 1 there is shown a stern tube seal 1 formed as a multi-lip seal and comprising a plurality of sealing lips 13, said plurality of sealing lips 13, Interacts with the bush 14 mounted on the bush 15. The bush 14 is connected at one end to the propeller hub 3 through the flange 16 and at the other end to the stern tube 2.

The intermediate space 17 thus formed is covered by a tubular protective cover 4 which is fixedly attached to the stern tube 2 at one end and fixedly attached to the tubular protective cover 4 at the other end, A part of the spout 4 protrudes above the propeller hub 3 to form an annular gap 5.

A ring 6 concentrically arranged in U-shape and concentric with the propeller hub 3 is arranged in an intermediate space 17 formed by a protective cover 4 which is radially outwardly Is open towards the protective cover 4 and is attached to the end of the propeller hub 3 using a screw connection 8 (only schematically shown). The ring 6 is accommodated in a receiving space formed by a U-shaped structure of a plurality of winding layers of a plurality of fishing lines, fishing nets and the like capable of passing through the annular gap 5 The values are dimensioned to be. Thereby, the stern tube sealing portion 1 is protected.

This is clearly described in the above-mentioned DE 37 18 419 C2.

According to the invention, the ring 6 at least partially comprises a material B which is consistent pourable at room temperature (T = 20 DEG C). In particular, mineral casting is considered.

In Fig. 2, a radial section of the ring 6 can be seen. The bore 10 is inserted into the ring 6 so that the ring 6 can be connected to the propeller hub 3 by means of a screw 8. [ For assembly, the bore 10 and the flush mounting bore 18 may be arranged, so that the appropriate tool can pass.

In Fig. 3, it can be seen that the ring 6 can be formed integrally.

An insert portion 9, preferably an insert portion 9 made of metal, may be inserted into the bore or may be inserted into the bore during casting of the ring 6, can be inserted into the mold. Thus, in particular, the material of the ring 6 can be prevented from breaking. Figures 4 and 5 illustrate two different solutions.

6 and 7, the ring 6 comprises a plurality of sectors 6 ', 6' ', 6' '' and 6 '' '', each of which covers a circumferential section can see.

A centering element 7 may be provided (see FIG. 1), so that the individual sectors are accurately in contact with each other in the circumferential direction and are accurately positioned axially, and FIGS. 8A, 8B and 8C are three different variations. Thus, it is possible to improve the accuracy in assembly of the ring sectors 6 ', 6' 'in the axial direction.

A transition region between the two ring sectors 6 ', 6 " is shown schematically in the radial direction. As can be seen from the three variations according to Figures 8a, 8b and 8c, the joint may be configured not to be flat but in a crosswise or angled configuration (see Figure 8a) (See Figs. 8B and 8C). The last two cases described above allow the two ring sectors 6 'and 6 " which are in contact with each other to be assembled in the axial direction exactly, so that the individual parts can be correctly arranged with respect to each other if the ring sectors are assembled.

Thus, using only two segments or sectors results in better installation results. Also, centering these sectors with respect to each other is simple but produces good results.

In Fig. 9, an insert portion 9 is schematically shown which is cast together when the ring 6 or ring 6 sectors are cast. In Fig. 10, it can be seen how the insert portion 9 is perforated in order to be able to be attached to the ring 6 according to a desired hole pattern.

To this end, it can be seen in figure 11 that an insert part 9 is provided which includes different bores and which can be fixed to the ring 6 in various ways.

Also, as can be seen in FIG. 12, a slot 11 is also provided which is configured in a kidney shape and thus allows the ring 6 to be fastened in a simple manner.

To this end, it can be seen in Figure 13 that an insert portion in the form of an eccentric insert 12 is provided. These insert portions are formed in the form of a sliding bearing and have two rings that can be rotated with respect to each other (see arrows in Fig. 13). By rotating the inner ring of the eccentric insert 12, the position of the bores through which the threads can pass can be altered to fit snugly into a threaded bore in the propeller hub.

1: stern tube seal 2: stern tube
3: Propeller hub 4: Protective cover (rope guard)
5: annular gap 6: ring
6 '', 6 ''',6'''': ring sector 7: centering element
8: Screw connection part 9: Insert part
10: bore 11: slot
12: eccentric insert 13: sealing lip
14: Bush 15: Propeller shaft
16: flange 17: intermediate space
18: Mounting bore
B: Materials (mineral casting / polymer concrete)
a: Axial direction

Claims (10)

A protection device for a stern tube seal (1) of a propeller-driven vessel, characterized in that an intermediate space is provided between the stern tube (2) and the propeller hub (3), the intermediate space being concentric with the propeller hub The protective cover 4 is fixedly connected to the stern tube 2 at one end and coupled to the propeller hub 3 at the other end to form an annular gap 5, A ring 6 concentrically arranged on the propeller hub 3 and having a U-shaped radial section is arranged in the intermediate space between the propeller hub 3 and the stern tube 2 in the protective cover 4, A protection device for a stern tube seal (1) of a propeller-driven vessel, wherein the U-shaped ring (6) opens radially outwardly,
Characterized in that the ring (6) at least partly comprises a material (B) which is consistently pourable at room temperature (T = 20 DEG C). The stern tube seal (1) of the propeller- Protective device for. The protective device for a stern tube seal (1) according to claim 1, characterized in that the material (B) is concrete, in particular mineral casting. 3. A method according to claim 1 or 2, characterized in that the ring (6) comprises two or more ring sectors (6 ', 6' ', 6' '' and 6 '' ' '', 6 '', 6 '' ', 6' '' 'extend over a predetermined circumferential angle and the ring sectors 6', 6 ' Are preferably connected to one another. ≪ RTI ID = 0.0 > 1, < / RTI > 4. The method according to claim 3, characterized in that two, three, four, five or six ring sectors (6 ', 6' ', 6' '', 6 '' ' (1) of a propeller-driven vessel. 5. A device according to claim 3 or 4, characterized in that the ring sectors (6 ', 6' ', 6' '', 6 '' '') are aligned with respect to each other using a centering element (7) ) Is preferably formed by complementary profiling the end points of the ring sectors 6 ', 6' ', 6' '', 6 '' '' arranged in the circumferential direction (1) of a propeller-driven vessel. 6. Method according to any one of claims 1 to 5, characterized in that the ring (6) or the ring sectors (6 ', 6' ', 6' '', 6 ' Is connected to the cover (4) or to the propeller hub (3). 7. A device according to claim 6, characterized in that the insert parts (9) are arranged in the ring (6) or ring sectors (6 ', 6' ', 6' '', 6 '' ' Is inserted by one or more screws (8). ≪ Desc / Clms Page number 13 > 8. A protection device according to claim 7, characterized in that the insert parts (9) are at least partly surrounded by the material (B) of the ring (6) . 9. A composition according to any one of the preceding claims, wherein the material (B) comprises a filler and a binder, and optionally an adhesive, wherein the filler preferably has from 80% to 95% Preferably 5% to 20% by weight, the binder preferably comprising a resin, in particular an epoxy resin and a curing agent, in particular an aminic hardener. A protective device for a tube seal (1). 10. A propeller-driven vessel seal according to any one of claims 1 to 9, characterized in that reinforcing fibers, in particular glass fibers, carbon fibers or metal fibers, are added to the material (B) (1).

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