FI126321B - Device with tensioning anchor - Google Patents

Description

Device comprising a tether anchor

The invention relates to a device, in particular to a marine diesel engine engine having a tether anchor attachment according to the preamble of claim 1.

In the case of marine diesel engine engines and other internal combustion engine machines, it is already known to combine their machine part groups by means of a plurality of tension anchors and to apply pressure preload in tension anchored machine part groups. Thus, in the case of marine diesel engine engines, in particular, the crankcase is connected to the cylinder head by a plurality of tension anchors.

The tension anchors have an outer thread which allows them to be connected to one another from a group of machine parts to be connected, whereby the tension anchors are inserted, namely screwed, into the recesses of the machine part group comprising the inner thread. In internal combustion engines, the thread of the anchors must be protected from corrosion by the corrosive medium, thus preventing the anchors from breaking. To this end, in practice, tension anchors are provided with sealing devices. In prior art internal combustion engine machines, the sealing devices arranged on the tension anchors are implemented as O-ring rings fitted in the groove of the corresponding tension anchor. The groove for attaching O-ring seals causes groove stresses in the draw anchor, which can cause the draw anchor to break during use.

In addition, a corrosive medium accumulates above the O-ring so that the tension anchor can corrode and break above the O-ring. Thus, sealing the tension anchors with O-rings is generally disadvantageous.

A tow anchor attachment of the type described above is known, for example, from DE 2549342 A1. Conventional prior art is described, for example, in DE 145 0386 A1. Henceforth, the present invention is based on the problem of providing a novel device with a tether anchor attachment. This problem is solved by the device according to claim 1. According to the invention, the sealing device is formed as a sealing collar. For the purposes of the present invention, the tension anchor sealing device which seals the tension of the tension anchor with respect to the corrosive medium is formed as a sealing collar. Thus, the groove in the tension anchor, which is necessary in the prior art for securing the O-ring, can be dispensed with. Thus, the draw anchor becomes more load-bearing or, alternatively, can be made to have a smaller cross-section with similar load capacity. In addition, the use of a seal collar prevents the build-up of a corrosive medium above the thread so that the risk of tensile anchor breaking is generally minimized.

The sealing collar according to the invention comprises two sealing regions, namely, a first sealing region at a distance from the first thread to be sealed and a second sealing region at a second end adjacent the thread to be sealed, the first sealing region being formed by a plurality of protrusions the sealing area seals the thread of the draw anchor relative to the corrosive medium.

Preferably, the sealing collar is disposed over one portion of the respective anchor, but may also be vulcanized or shrunken or glued on.

Preferred further developments of the invention will be apparent from the following claims and the following description. Embodiments of the invention will be explained in more detail by way of the drawing, but not by way of limitation. In this case: Figure 1 is a partial cross-sectional view of a prior art device having a tether anchorage and Fig. 2 a partial sectional view of a device according to the invention having a tether anchorage and Fig. 3 shows a partial embodiment of a device according to the invention

Before describing the present invention in detail with reference to Figure 2, reference will first be made to the prior art with reference to Figure 1.

Fig. 1 is a partial cross-sectional view of a prior art tensile anchor connection between a marine diesel engine engine machine component group within the tow anchor 10 and a marine diesel engine engine machine component group 11, the engine component group 11 being a crankcase. At one end, the tension anchor 10 comprises an outer thread 13, the tension anchor 10 being screwed into the inner thread 14 of the recess made in the machine part group 11, namely the machine part group 11.

To seal the thread of the draw anchor connection between the draw anchor 10 and the machine part group 11, a draw device 15 is provided in the draw anchor 10, which is implemented in the prior art as an O-ring according to Fig. 1. The O-sealing ring is disposed in the groove 16 of the draw anchor 10, whereby the groove 16 causes groove stresses in the draw anchor 10. Thus, the loadability of the draw anchor 10 is reduced.

In addition, in the case of the tension anchor connection of Fig. 1, an etching medium may accumulate above the sealing device 15 between the tension anchor 10 and the machine part group 11, with respect to which the thread of the tension anchor 10 must be sealed by the sealing device 15. Thus, the tension anchor 10 is above the sealing device 15 under the influence of corrosion, so that the tension anchor 10 may break above the thread of the sealing device 15.

Figure 2 shows a partial cross-section of the device according to the invention in the region of the draw anchor 17 and the machine part group 18 of the device. The tension anchor 17, in turn, has an outer thread 20 at one end 19, whereby the tension anchor 17 is connected by means of an external thread 20 to the machine part group 18, namely screwed into the recess of the machine part group 18 comprising the inner thread 21. To seal the thread of the tension anchor 17 with respect to corrosion due to the corrosive medium, the tension anchor 17 is provided with a sealing device 22 formed as a sealing collar for the purpose of the present invention.

The sealing collar 22 has a tubular or tubular structure or shape and is positioned over a portion of the tension anchor 17, in particular vulcanized or shrunken or glued. Alternatively, it is also possible to attach the sealing collar 22 to the tension anchor recess formed in the recess.

The sealing collar 22 has two sealing regions, namely a first seal 23 spaced from the thread to be sealed by the tension anchor 17, a first seal region 24 and a second seal 25 opposite or adjacent the seal thread of the tension anchor 17, a second seal region 26.

As shown in Figure 3, this second sealing area 26 may also be optionally realized by means of another seal, for example in the form of an O-ring 29. For this purpose, the collar 22 is formed only in the first sealing region 24 at the first end 23.

In the illustrated embodiment, the first sealing region 24 is formed by a plurality of projections 27 according to Fig. 2 but also by Fig. 3, which seal the second sealing region 26 with respect to the corrosive medium. The first sealing region 24 thus prevents the corrosive medium from entering and accumulating in the second sealing region 26.

The second sealing area 26 seals the thread of the tension anchor 17 with respect to the corrosive medium, wherein in the illustrated embodiment, the second sealing area 26 is contoured to provide a response to the mounting depth of the tension anchor 17 to the

3, unlike the embodiment of FIG. 2, the seal 26 is sealed by another seal in the form of an O-ring 29, including the same effects as exemplified by the embodiment of FIG. Of course, however, a second collar may also be provided instead of the O-ring 29, for example.

Thus, according to the invention, a sealing collar is mounted on the draw anchor for sealing the tension anchor thread. Attachment of the sealing collar to the draw anchor may be achieved by vulcanizing or shrinking or gluing the draw collar onto the draw anchor. Likewise, the sealing collar may be formally attached to the draw anchor. Preferably, the sealing collar also serves as a mounting response.

One of the main advantages of the invention can be seen in the fact that the grooves in the draw anchor used to attach the O-sealing rings can be dispensed with. Thus, the draw anchor becomes more loaded. With the same load capacity of the draw anchor, its cross-section can be reduced. This results in cost and weight advantages. In addition, the use of a sealing collar minimizes the risk that a corrosive medium may accumulate above the thread to be sealed at the draw anchor, thereby reducing the corrosive stress of the draw anchor overall.

Claims (2)

A ship's diesel combustion engine machine with a towbar attachment, wherein the ship's diesel combustion engine machine subgroups are joined to each other by at least one tow bar to provide a pressure bias in the machine subgroups, where a tow bar is provided in the towbar of each tow bar to provide a tow bar and the sealing device comprises at least one sealing collar (22), characterized in that the sealing collar (22) has a hose-like or tubular shape, that the sealing device comprises two sealing regions (24, 26), namely at a first end (23) away from the thread. to be sealed a first sealing region (24) and at a second end (25) adjacent the thread to be sealed a second sealing region (26), that both sealing regions are sealed by the sealing collar (22), the sealing collar (22) sealing the first the sealing region (24) and the second sealing zone the area (26) is sealed by a second seal, that the first sealing region (24) is formed by several projections (27) which seal the second sealing region (26) relative to a medium, that the second sealing region (26) sealing the thread with respect to a medium, and the second sealing region (26) forming a stop which limits the mounting depth of the draw anchor (17). Device according to claim 1, characterized in that the sealing collar (22) is fixedly molded or vulcanized or shrunk or glued to a part of the respective tension anchor (17).