SANDING SYSTEM FOR A RAIL VEHICLE

Abstract

The invention relates to a sanding system for a rail vehicle with a grit container, with a conveying device and with a feeding device. The grit container contains a grit. The grit passes from the grit container into the conveying device and from the conveying device into the feeding device. The feeding device is configured in such a way that the grit can be introduced in a targeted manner into a wheel region and/or into a rail region of the rail vehicle. The conveying device has a driven conveyor worm which rotates about a longitudinal axis and by way of which the grit passes from the grit container into a conveying chamber. Compressed air can be introduced into the conveying chamber, in order to transport the grit from the conveying chamber into the feeding device.

Claims

1-12. (canceled)

13. A sanding system for a rail vehicle, the sanding system comprising: a grit container containing grit; a conveying device connected to said grit container, wherein the grit passes from said grit container into said conveying device; and a feeding device connected to said conveying device, wherein the grit passes from said conveying device into said feeding device; said feeding device being configured to feed the grit in a targeted manner toward at least one of a rail vehicle wheel or a rail; said conveying device including a driven conveying worm configured to rotate about a longitudinal axis and conveying the grit from said grit container into a conveying chamber; an electric motor being a steplessly speed-controlled drive connected for driving said conveying worm, said electric motor to be controlled for controlling a rotational speed: to set, based on a predetermined grain size of the grit, a delivery amount of the grit by changing the rotational speed; to set a speed of rotation of said conveying worm depending on the grain size of the grit in order to discharge the grit uniformly and sparingly; and a compressed air injection device including a compressed air nozzle for introducing compressed air at a lateral region into said conveying chamber, said compressed air injection device being configured: in an active state of the conveying device, to transport the grit from said conveying chamber into said feeding device and, in an inactive state of the conveying device, to inject compressed air for at least one of cleaning or drying the feeding device.

14. The sanding system according to claim 13, wherein said conveying device comprises an elongate worm chamber in which said conveying worm is disposed, and wherein at least one of said worm chamber or said conveying worm are horizontally oriented or have an upward or downward inclination relative to a horizontal plane.

15. The sanding system according to claim 13, wherein said conveying chamber has a hollow configuration and is disposed between said conveying device and said feeding device such that the grit, which is conveyed from an inlet zone of said conveying device into an outlet zone of said conveying device over the entire said worm chamber, falls vertically into said conveying chamber.

16. The sanding system according to claim 15, wherein said compressed air injection device comprises a compressed-air nozzle connected to said conveying chamber.

17. The sanding system according to claim 16, wherein said compressed-air nozzle is arranged in a lateral region of said conveying chamber.

18. The sanding system according to claim 16, wherein said compressed-air nozzle is controlled as follows: for an active conveying device, to cause compressed air to catch the grit falling into said conveying chamber and to transport the grit into said feeding device; or for an inactive conveying device, to cause the compressed air that is introduced into said feeding device via said conveying chamber to clean or dry said feeding device.

19. The sanding system according to claim 13, wherein a transition from said conveying chamber to said feeding device is configured as a Venturi nozzle or as a de Laval nozzle.

20. The sanding system according to claim 13, wherein said conveying device or said worm chamber is formed with an inspection opening for at least one of cleaning or emptying grit therefrom.

21. The sanding system according to claim 20, wherein said inspection opening is formed at a lowest point of said conveying device or said worm chamber.

22. The sanding system according to claim 13, wherein said feeding device is configured to introduce the grit in a targeted manner into a wheel-rail nip of the rail vehicle.

23. The sanding system according to claim 13, wherein said grit container has a flange with through-opening at a lowest point thereof that is connected to a flange with through-opening of said conveying device, and wherein said openings are formed to enable the grit to pass directly by gravity into said conveying device or into said worm chamber.

Description

[0043] FIG. 1 shows the arrangement according to the invention in an overview, and

[0044] FIG. 2 to FIG. 4 shows details of the arrangement according to the invention with reference to FIG. 1.

[0045] FIG. 1 shows the arrangement according to the invention in an overview.

[0046] The sanding system for a rail vehicle has a grit container 1, a conveying device 2 and a feeding device 3.

[0047] The grit container 1 contains a grit SM and is connected to the conveying device 2 such that the grit SM passes from the grit container 1 into the conveying device 2.

[0048] The connection between the grit container 1 and the conveying device 2 is provided at the lowest point of the grit container 1.

[0049] The conveying device 2 is connected to the feeding device 3 such that the grit SM passes from the conveying device 2 into the feeding device 3.

[0050] The feeding device 3 is designed in such a way that the grit SM can be introduced in a targeted manner into a region of the wheel R and/or into a region of the rail SCH or into a wheel-rail gap RSCHS of the rail vehicle.

[0051] FIG. 2 and FIG. 3 show details of the conveying device 2 and of the feeding device 3.

[0052] The conveying device 2 comprises a driven conveying worm 2.5 which rotates about a longitudinal axis and by means of which the grit SM is transported from the grit container 1 into the feeding device 3.

[0053] The conveying device 2 has an elongate worm chamber 2.2 in which the conveying worm 2.5 is arranged. Here, the screw chamber 2.2 and the conveying worm 2.5 are oriented horizontally.

[0054] The conveying worm 2.5 is connected to an electric motor 2.1 which turns the conveying worm 2.5 or sets it in rotation.

[0055] The electric motor 2.1 can be controlled to control the rotational speed such that, for a predetermined grain size of the grit SM, a delivery amount of the grit SM can be set by changing the rotational speed.

[0056] The electric motor 2.1 rotates more slowly or more quickly by stepwise changes of an electrical voltage or current intensity, with the result that the quantity of the grit SM to be conveyed can be set very accurately.

[0057] The speed of rotation of the conveying worm 2.5 is thus changed or adapted depending on the grain size of the grit SM. A highly precise delivery amount is thus achieved.

[0058] A hollow conveying chamber 2.4 is arranged between the conveying device 2 and the feeding device 3 such that the grit SM, which is conveyed from an inlet zone EZ of the conveying device 2 into an outlet zone AZ of the conveying device 2 over the entire worm chamber 2.2, falls vertically into the conveying chamber 2.4 and reaches a lowest point of the conveying chamber 2.4 there.

[0059] A compressed-air feed 2.3 is provided on the conveying chamber 2.4. This compressed-air feed can be designed, for example, as a compressed-air hose in order to supply compressed air to the conveying chamber 2.4 via a controllable compressed-air nozzle 2.6.

[0060] The grit container 1 has at its lowest point a flange with through-opening that is connected to a flange with through-opening of the conveying device 2. The latter together form a funnel such that grit SM passes directly into the conveying device 2 or into the worm chamber 2.2 under the action of gravity.

[0061] Thus, as a result of gravity, the grit SM can fall or pass into the worm chamber 2.2 directly, that is to say without additional loosening elements, stirrers, etc.

[0062] Owing to the selected interface between the grit container 1 and conveying device 2, bridge formations of the grit are prevented in this region.

[0063] The conveying worm 2.5 further assists this effect in that, on account of the (stirring) movement carried out by it, a movement of the grit SM is assisted in the lower interface region.

[0064] With this arrangement, the grit is removed from the grit container 1 down to the last grain, with retention of old grit being avoided.

[0065] The conveying device 2 or the worm chamber 2.2 has at its lowest point an inspection opening WOE for cleaning purposes. This ensures easier access to the entire system for cleaning purposes. Relatively large contaminants (for example cigarette butts, leaves, etc.) in the grit SM can be readily removed via the inspection opening WOE without having to dismantle system components.

[0066] FIG. 4 shows details of the conveying chamber 2.4.

[0067] The conveying chamber 2.4 is connected to a compressed-air nozzle 2.6 in a lateral region. Said nozzle is controlled in such a way [0068] that, for an active conveying device 2 or for an active conveying worm 2.5, compressed air catches the grit SM falling into the conveying chamber 2.4 and transports it into the feeding device 3 with compressed-air assistance, or [0069] that, for an inactive conveying device 2 or for an inactive conveying worm 2.5, compressed air is introduced into the feeding device 3 via the conveying chamber 2.4 in order to clean it or in order to dry it.

[0070] A transition from the conveying chamber 2.4 to the feeding device 3 is preferably designed, as shown here, as a Venturi nozzle VT or as a de Laval nozzle.