SI20202A - Noise dampening device for rail breaks - Google Patents

Abstract

The invention deals with a procedure and device for noise dampening during breaking, while the procedure according to the invention includes the application of the selected media, usually a liquid or a suspension of air and liquid, with the application device for applying in a predefined quantity to predetermined areas on the rail-break or at least one breaking element of the rail-break. The type as well as the quantity of the media is selected following the requirement that its application may not considerably deteriorate the breaking effects between the braking element (7) and the wheel, which is during breaking gripping to it or provides the necessary friction. The device according to the invention includes at least one signalling element (in the given example a proximity switch), at least one element for the dosage of media (in the given example a dosage or pump aggregate), a system or several ones for the manifold (in the given example a mixing distributor) and at least one element for spraying the media, preferably a suspension of air and liquid (in the given example a nozzle).

Description

In the process of braking on rails, especially in rolling stock, it is common to hear noise or whine during braking. The technical problem to be solved, therefore, is to eliminate the noise or whine in question without significantly impairing the braking properties or breaking down the required braking effects.

The state of the art

Until now, the inventor is not aware of a device that would significantly reduce the noise or squeal of the brakes and at the same time have no detrimental effect on the braking properties. Known braking devices comprise rail brakes. The thymic brake comprises at least one inhibitor (7), most commonly from 90 ° about the main longitudinal axis of the rotating rail, which, when the wheel collides too fast, slides against it, thereby causing increased friction between the surfaces of the brake as the side of the rail brake, and the side of the wheel. Most often, however, one can find the brakes (7) positioned in pairs so that friction is applied to both sides of the wheel at the same time. Friction between the side of the rail brake and the side of the wheel causes an unpleasant noise or a whimper. However, the brakes of the rail brakes may also be of different profiles and may be made of steel or other metal or non-metallic materials, but in accordance with the characteristics of the wheel that inhibits it.

Description of the new solution

The subject of the present invention is a method and a device for reducing the noise of inhibition.

The method of the invention comprises applying a selected medium, usually a fluid or mixture of air and liquid, with a device for applying to predetermined locations on a rail brake or at least one rail brake inhibitor in a predetermined amount. Both the medium and the amount of medium are selected with the requirement that their use should not substantially impair the braking performance or reduce the friction coefficient between the brake (7) and the wheel, which brakes or tends to brake with the brake.

The device according to the invention comprises at least one signal transducer (in the embodiment, proximity switch), at least one signal processing means (in the control case, in the embodiment case), at least one medium dosing agent (in the embodiment, the dosing or pumping unit), a system or a plurality of them for distribution (in the case of mixers) and at least one means of injecting the medium, preferably air / liquid mixtures (in the case of nozzles).

The essence of the invention is explained in more detail below with a description of the embodiments and the accompanying drawings, the drawings being part of the present patent application and shown in the drawings.

Figure 1 layout of proximity switches (sensors) and dosing or. pumping units along the rail, showing in the sketch the direction of the wheels (A), dosing or pumping units (1a to 1f), proximity switches (6a to 6f) and control unit (5);

Fig. 2 is a distribution line for the dosing or pumping unit (1) or one of the sections of the brake or brake (7), with the dosage and / or pumping units respectively. pumping unit, mixing manifold (2), mixing manifold (3), nozzle or multiple (4), control unit (5) and proximity switch (6);

Figure 3 shows a cross-section of a rail and thymic nozzle brakes, with a schematic illustration of a dosage or a nozzle. pump unit (1), mixer manifold (2), mixer manifold (3), steam connected nozzle (4), brakes (7), wheel (8), rail.

Dosage or. the pumping units are marked in the drawings by the number 1 and the letter of the alphabet; Also, the number of aggregates is not limited to six and this number is shown only by way of example. The same applies to the proximity switches (6), which are exemplified in the drawings by a number indicating the fact that they are an proximity switch (6) and a letter indicating that they belong to a particular dosing or pumping unit (1). Thus, in the embodiment, the proximity switch 6a and the metering or dosing switch are interconnected. pumping unit la, proximity switch 6b and dosing and / or pumping units. pumping unit lb, etc.

In an embodiment, the process of the invention comprises the following steps:

- when the wheel is hit too quickly, the rail brake is applied and the brake (7) is applied sideways to the wheel side (8);

- activate or activate the proximity switch (6) for reasons of approach or contact;

- the proximity switch (6) includes a pumping or dosing unit (1) which pushes the mixture of air and medium, according to the embodiment of the liquid, to the mixing manifold (2) and (3);

- the mixing manifolds (2,3) divide the mixture of air and medium between the nozzles (4);

- the nozzles (4) spray the mixture of air and medium onto the brakes (7).

The arrangement of the nozzles (4) in the embodiment is such that it prevents the resonance phenomena between the brakes (7) and / or between the individual brakes (7) and the wheel (8), which is performed by the asymmetric distribution of the nozzles (4) with respect to the axis determined with the course of the rail. In the embodiment, the control unit (5) sets the injection time or the interval between the individual syringes. In the embodiment, the nozzles (4) act alternately, but of course an embodiment with only one nozzle (4) is also possible.

In the specific embodiment, the proximity switches (6) detect the wheel (8) only if the brake is actuated and then allow the medium to be sprayed onto the brake (7) located in front of the oncoming wheel (8). Thus, it is shown in Figure 1 that the proximity switch (6a) activates the pump and / or pump. the dosing unit (1a), which cuts the surface of the inhibitor (7), even before the nozzles are connected to the dosing or. pump unit (1a), wheel (8) arrived. In this way it is possible to accurately (dynamically) determine the media deposits, which are also recorded by the wheel during lateral compression (7) to prevent the possibility of two or more applications being applied at the same location, which could reduce the effect inhibition.

The control unit (5) receives the necessary parameters that are necessary for reliable brake operation, such as wheel speed, etc. If the wheel speed is higher than the limit speed, the control unit (5) blocks the unit.

In a specific embodiment, the method of reducing the braking noise comprises applying a mixture of a fluid with a pump unit (1) to a section of the inhibitor (7) defined by an approach switch (6) and asymmetrically positioned nozzles (4), the amount of fluid being substantially uniform. distributed between associated nozzles (4) using mixer manifolds (2,3).

The device according to the invention performs the process of the invention as presented above and comprises at least one dosage or pump unit (1), at least one mixing manifold (2, 3), at least one nozzle (4).

The device according to the invention may be controlled by a control unit (5). The process can also be characterized by the fact that the injection through the nozzles is carried out in a long but narrow jet.

It is to be understood that the described solution can also be implemented in a different design that does not alter the essence of the invention.

Claims (12)

PATENT APPLICATIONS A method of reducing the braking noise, characterized in that it comprises applying a predetermined amount of the selected medium to the predetermined locations on at least one brake of at least one rail brake. A method according to claim 1, characterized in that the track brake of the approaching wheel activates at least one dosing agent, which distributes the selected medium, preferably a mixture of air and liquid, through the system or their divorce amount, into at least one nozzle which sprays on the brake. in front of an approaching bike. Method according to any one of the preceding claims, characterized in that the injection is interrupted in time and controlled by controls. A method according to any of the preceding claims, characterized in that it comprises the following steps: - when the wheel (8) is struck, the rail brake is applied and the brake (7) laterally rests on the side of the wheel (8); - activate or activate the proximity switch (6) for reasons of approach or contact; - the proximity switch (6) includes a pumping or dosing unit (1) which pushes the mixture of air and medium, according to the embodiment of the liquid, to the mixing manifold (2) and (3); - the mixing manifolds (2,3) divide the mixture of air and medium between the nozzles (4); - the nozzles (4) spray the mixture of air and medium onto the brakes (7) in front of the approaching wheel. Method according to any one of the preceding claims, characterized in that it comprises applying a mixture of fluid with a pumping unit (1) to the section of the inhibitor (7) defined by the proximity switch (6) and the asymmetrically positioned nozzles (4), the amount of liquid is essentially evenly distributed among the associated nozzles (4) using mixer manifolds (2,3). 6. Braking noise reduction device, characterized in that it comprises at least one signaling agent, at least one signal processing agent, at least one metering agent, at least one sprayer and a system or a plurality of media connected thereto, preferably air mixtures. and fluids. Apparatus according to claim 5, characterized in that it comprises at least one proximity switch (6), at least one control unit (5), at least one dosing or pumping unit (1), at least one mixing distributor (2,3), at least one medium dilution system, preferably air / liquid mixtures and at least one nozzle for injection (4). Device according to any one of the preceding claims, characterized in that the nozzles (4) are arranged asymmetrically with respect to the axis, determined by the course of the rail, which prevents resonance between the brakes (7) and / or between the individual brakes (7) and the wheel (7). 8) · Device according to any one of the preceding claims, characterized in that the at least one proximity switches (6a) and at least one metering or dosing switch are connected. pumping unit (1a). Device according to any one of the preceding claims, characterized in that six approximate switches (6a, 6b, 6c, 6d, 6e, 6f) and six dosing and / or dosing switches are connected to the steam. pumping units (la, lb, lc, ld, le, lf). Device according to any one of the preceding claims, characterized in that the control unit (5) in the case of too fast movement of the wheel (8) blocks the operation of the device. Method or device according to any of the preceding claims, characterized in that the injection through at least one nozzle (4) is carried out in a long but narrow jet.