DE8114906U1 - Noise-dampened rail wheel - Google Patents

Description

KLÖCKNER-WERKE AKTIENGESELLSCHAFT
Klöcknerstrasse 29, 41 Duisburg 1

Noise-dampened rail wheel

The invention relates to a noise-damped rail wheel with at least one annular ring attached to the rail wheel Attenuator consisting of elements arranged axially to one another, which alternately consist of metal and damping material exist.

Rail wheels of this type are already known per se (DE-PS 833 362). The annular attenuator is the simplest Case made of metal rings arranged one on top of the other and built into a groove in the rim. These washers can additionally smell divided in the circumferential direction be. Their arrangement is made so that on the one hand they are relatively opposite under the influence of wheel vibrations the wheel can run and that on the other hand, an additional surface friction of the individual rings against each other is possible. In addition, the contact surfaces of the individual ring disks can be covered with a film made of a sehmieraifctel-like Material of high toughness can be coated so that additional damping intermediate layers are formed are. These disks form an acoustic short circuit with one another and with their edges with the rail wheel.

It is also known (DE-PS 26 05 812) to form such annular damping members that at least a plastic layer is applied to one side of a wheel disc and this plastic layer

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- 4 - Klöckner-Werke AG file 2001

has a metal disc as a cover plate - the plastic layer consists of a two-component material based on a filled synthetic resin, which on the one hand has a high rigidity and, on the other hand, no noticeable changes in shape under the influence of vibrations performs. The mode of action of this ring-shaped steaming device has not been clarified in detail, experimentally it was found that the plastic layer together with the metal disc in a frequency range of 250 Hz Up to 1,120 Hz, the decay times of the sound vibrations are reduced by 55 to 76%.

It is further known (DE-PS 19 26 312) _t on the metal disc has a rim covering the annular plastic layer to apply the adjusting ring in turn bears a disc substantially the contour of the surface of the wheel is made of metal.

There are also ring-shaped dampers for rail wheels known (seminar environment, track-guided long-distance traffic, wheel / rail technology reports, Kassel, October 1979), which consist of metal rings and rings made of plastic material arranged with one another in the axial direction. Here, the arrangement of the rings is made so that the metal rings are arranged without mutual contact between the rings made of plastic material. Such damp Systems have a damping behavior that corresponds approximately to the damping elements mentioned above. It showed Surprisingly, that a broadband steam ungssystem is created, if in addition that from such Rings constructed attenuator is biased in the axial direction.

5 - - Klöckner-Werke AG file 2001

The invention is therefore based on the object, noise-damped Rail wheels with at least one annular damping member attached to the wheel rim or the wheel rim from elements arranged axially one behind the other, which alternately consist of metal and plastic material exist to be designed in such a way that a broadband noise attenuation he follows.

Under annular damping members from elements arranged one behind the other in the axial direction are in the sense of the invention on the one hand to understand self-contained annular elements, on the other hand also such annular disk-shaped elements Elements that are slotted, after the assembly of the attenuator, the slits in the individual Layers are arranged offset to one another. In the same way, there are also segments of a circle under elements To understand excerpts from such axially interconnected annular disk-shaped elements.

According to the invention, this object is achieved in that the elements made of metal have no mutual metallic elements Contact between the elements of plastic material are arranged and that the annular damping member is essentially axially biased.

According to a preferred embodiment, it is annular Attenuator between one attached to the rail wheel Arranged retaining ring and a clamping ring connected to the retaining ring. The retaining ring and the clamping ring can according to the invention be connected to each other by screw bolts, the diameter of the holes in the elements for the clamping bolts is greater than the diameter of the screw bolts, so that about the bolts between each

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Metal rings and the metal rings and the wheel no acoustic short circuit is formed. According to an advantageous Further training are in the aligned holes of the elements each insulating sleeves for the Bolt inserted. The screw connections have the advantage that the axial preload is set sensitively and can also be adjusted. Instead of the screw connections, rivets can also be provided.

A plastic material that is not permanently elastic has proven to be particularly good Thermoplastic proved to be particularly advantageous. According to yet another embodiment of the invention are the elements made of plastic material and metal connected to one another by adhesive, so that they are an easy-to-assemble unit before installation on the rail wheel form.

The invention is shown in the drawing using two exemplary embodiments explained. Show it:

Fig. 1 is an axial section through a rail wheel in detail with the first embodiment also in the cutout,

2 shows an illustration of the second exemplary embodiment according to FIG. 1.

In Fig. 1, 1 denotes the wheel rim and 2 denotes the wheel disc of a rail wheel. The rim points on both sides each have an annular recess 3 as contact surfaces for the attenuator 4. This consists of the Rings 5 made of plastic material and metal rings 6 arranged one behind the other in the axial direction. The damping element is arranged on the, screw bolts 7, which press the damping member against the annular recess 3 via the clamping ring and thus generate the axial preload. The metal rings have

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a smaller outer diameter than the rings made of plastic material. Furthermore are in the aligned Holes of the rings sleeves 9 made of plastic material used, which prevent metallic contact with the screw bolts. As a result of the smaller outer diameter of the metal disks, they are secured against metal contact with one another and with the wheel rim.

In FIG. 2, 1 denotes the wheel rim and 2 denotes the wheel disk of a rail wheel. The rim has a circumferential recess 10 on both sides, into which a retaining ring 11 is inserted, the ring-like has bores 12 with internal threads 13 for clamping bolts 14 distributed in the circumferential direction. On the clamping bolt ring disks 15 made of plastic material and ring disks 16 made of metal are pushed on one after the other in the axial direction, being on the last ring made of plastic material a clamping ring 17 made of metal follows. The inner diameter of the holes in the metal ring disks are larger than that Outside diameter of the clamping bolts 14, so that an acoustic short circuit through the clamping bolts of the individual metal rings between each other and the metal rings with the rail wheel is prevented. To even with slight shifts of the individual Rings to each other to avoid an acoustic short circuit, can each in the aligned holes of the rings Sleeves 18 made of plastic material can be used, which guide the threaded bolts 14. The individual rings can be connected to each other be connected by adhesive layers, not shown, so that the rings together to form a structural unit prior to assembly can be glued.

In particular, non-permanently elastic ones have proven to be the plastic material Thermoplastics proved.

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summary

The noise-damped rail wheel has a damping member, which is from one behind the other in the axial direction alternately arranged annular elements

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Made of metal and plastic. The attenuator is essentially axially biased, with the metal elements have no metallic contact with each other or with the rail wheel.

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Reference cell panels ; ; ·; ; ;

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1 wheel rim

2 wheel disc

3 annular recess

4 attenuator

5 ring made of plastic material

6 metal ring

7 bolts

8 tension ring

9 pods

10 turning

11 retaining ring

12 bore

13 internal thread

14 clamping bolts

15 washer made of plastic material

16 Metal ring washer 1.7 Tension ring

18 sleeve

Claims (6)

j ^ 2j KLÖCKNER-WERKE AKTI ^ WGESELLSCiTAPT Klöcknerstrasse 29, 41 Duisburg 1 Noise-damped rail wheel Ans p, „r ü c h e 1. Noise-damped rail wheel with at least one ring-shaped damping member attached to the wheel rim (the wheel rim) and made up of elements arranged one behind the other in the axial direction _; which consist alternately of metal and damping material, characterized, that the elements made of metal (6,16) without mutual metallic contact between the elements (5 or 15) made of plastic material are arranged and that the annular attenuator (14) is substantially is axially preloaded. 2. Noise-damped rail wheel according to claim 1, characterized in that that the annular damping member between a retaining ring (11) attached to the rail wheel and one with the retaining ring connected clamping ring (17) is arranged. 3. Noise-damped rail wheel according to claim 2, characterized in that that the retaining ring and the clamping ring are connected to one another by screw bolts (7) and the diameter of the holes in the metal rings for the screw bolts is larger than the diameter of the screw bolts. • ■ ΓΤ η * "- ^ .- oi-i ·: Γ " ""'Γ μ nm groove klÖcknei-Werke AG File 20b * 1 4. Noise-damped rail wheel according to claim 3, characterized in that that inserted into the bores of the elements insulating sleeves (18) for passing through "the screw bolts are. 5. Noise-damped rail wheel according to one of claims 1 to 4, characterized, .· that the plastic material is not permanently elastic Is thermoplastic. 6. Noise-damped rail wheel according to one of claims 1 to 5 , characterized, that the elements made of plastic material and made Metal are bonded together by glue. ·· ■