RU2502623C1 - Device to feed sand under locomotive wheels - Google Patents

Abstract

FIELD: transport.

SUBSTANCE: invention relates to railway transport operated, for example, in open-cast mines. Device comprises sand feed tubes with nozzles to direct air-sand jet to wheel central track part and toward wheel flange interacting with rail head fillet. At curvilinear track sections, sand feed nozzles feed sand exclusively to central zone of rail-to-wheel contact and inner rail and to wheel flange at outer rail inner side. Sand feed to wheel flange plus lubrication of curved track outer rail inner face facilitates adhesion at said track sections.

EFFECT: reduced sand consumption, better adhesion at operation in open-cast mines.

2 cl, 2 dwg

Description

The invention relates to railway transport, in particular to devices for regulating the supply of sand under the wheels of a locomotive when a train moves along a rail in real operating conditions, for example, in quarries, in the mining industry.

Under the operating conditions of railway transport at mining enterprises conducting open-cast mining of solid minerals, intense wear of the contacting surfaces of the wheel and rail is observed in connection with the slip of the wheels of the locomotive relative to the rails. This is facilitated by a number of specific factors, including increased rails for raising the rail track (40 ... 60%) and small radii of curvature of the rail tracks (up to 40 ... 80 m), the presence of curved sections of career paths with a radius of less than 350 m with a length of more than half their total length etc .. One way to solve this problem is to increase the coefficient of adhesion of the wheels of the locomotive with the rails.

A known method of increasing the adhesion of a locomotive wheel to a rail, which consists in supplying dry sand to the points of contact of the wheels with the rails [1]. This method is not suitable for use in winter conditions, since the amount of sand continuously supplied to the contact zone significantly exceeds the required amount and its excess clogs the track.

A device for feeding sand under the wheels of a locomotive is known, comprising a sand hopper, a nozzle connected to an nozzle to the outlet of which a nozzle is connected. This device also contains a pulsed sand feed chopper and a humidity sensor for outdoor air [2].

A disadvantage of the known device is the low coefficient of adhesion of the wheels of the locomotive with the rails, since in the conditions of quarries at elevated elevation angles of the rail track the required traction due to intermittent sand supply is not provided. Under these conditions, the supply of sand should be continuous [3]. And when moving on the curvatures of the rail track, an increased consumption of sand will occur. In addition, at negative temperatures typical of the winter climate of the northern region and Siberia, the air humidity sensor cannot fully perform its functions.

It is also known a device for feeding sand under the wheels of a locomotive, containing a sand hopper connected by sand pipelines with nozzles, to the exits of which are connected sand supply pipes connected to one main sand supply pipe with a nozzle. Moreover, each of the nozzles is pre-adjusted for the supply of a certain amount of sand per unit of time [4]. The technical result of the known device is a solution that provides an adjustable amount of sand continuously supplied under the wheels of a locomotive. This technical decision was made by us as a prototype. The disadvantage of the prototype is the increased consumption of sand when passing a locomotive of curved sections of the rail track.

The technical result of the invention is to reduce the consumption of sand during the passage of locomotive curved sections of the rail track, increasing the adhesion of the wheel to the rail and increasing traction.

The technical result is achieved by the fact that the sand supply pipes with nozzles are installed with the ability to direct the sand jet to the central part of the track of the wheels of the locomotive and in the direction of the wheel flange interacting with the working fillet of the rail head. The technical result is also achieved by the fact that when moving along curved sections of the rail track, the sand feeding nozzles, depending on the direction of rotation of the rolling stock, operate in a mode that provides sand only to the central part of the contact zone of the wheel with the rail on the inner rail and into the contact zone (working fillet ) to the wheel flange on the inside of the outer rail.

Figure 1 shows a diagram of a device for feeding sand under the wheels of a locomotive.

Figure 2 shows a side view of the wheels of a locomotive and a rail.

A device for supplying sand under the wheels of a locomotive consists of a sand bin 1 connected to sand pipelines and nozzles 2, 3, 4, 5 connected to respective sand supply pipes 6, 7, 8, 9. Sand supply pipes are pairwise inserted into holders 9,10 and equipped with nozzles, respectively 11, 12 and 13, 14, with the ability to direct the sandblast to the central part of the track of the wheels of the locomotive 15, 16 and in the direction of the wheel flange interacting with the working fillet of the rail head 17.

Nozzles 2, 3, 4, 5 are connected to electro-pneumatic valves, respectively, 18, 19, 20, 21.

The device operates as follows.

When the locomotive moves along a straight section of the rail track, the wheels 15 and 16 of the wheel pair are located symmetrically with respect to the axis of the rail track, and the contact spot is in the central part of the rail head. By pressing the switches 22 and 23, the air from the supply line 26 through the uncoupling valve 27 and the electro-pneumatic valves 18 and 21 is fed to the sand nozzles 2 and 5. Next, the sand-air mixture is supplied to the nozzles 6 and 9, respectively, 11 and 14 and enters the central part of the rail head to the area of the contact spot of the wheels of the locomotive with the rails.

When the locomotive moves along the curved section of the rail track, the locomotive’s wheel pair, due to the action of centrifugal forces, mixes in the direction of the outer rail of the curved section of the track and is pressed by the wheel flange to its inner face. In this case, the contact spot (for example, when turning left - at the wheel 15) will be closer to the flange of this wheel from the inner side of the outer rail, while the wheel 16 will move by the size of the gap of the rail knees towards the outer rail of the curved section and its contact spot will be located closer to the central part of the head of the inner rail. In this case, by pressing the switches 24 and 23, the air from the supply line 26 through the uncoupling valve 27 and the electro-pneumatic valves 19 and 21 is fed to the sand nozzles 3 and 5. Next, the air-sand mixture is supplied through the pipes 7 and 9 to the nozzles 12 and 14, respectively and enters the contact zone (working, fillet) on the wheel flange 15 on the inner side of the outer rail and the Central part of the rail head in the zone of the contact spot of the wheel 16.

In connection with the use of lubrication (lubrication) of the inner face of the outer rail of curved sections of the rail track, the supply of sand to the wheel flange in the area of its contact with the rail will increase the adhesion coefficient when the locomotive moves along the curved section of the rail track.

The present invention allows to reduce the consumption of sand during the movement of the locomotive in quarries and to increase traction by improving the adhesion conditions of the wheels of the locomotive with rails.

INFORMATION SOURCES

1. Filonov S.P., Gibalov A.I. and others. Locomotive 2TE116. Sand system. M., Transport, 1985.

2. A.S. 592645, cl. B61C 15/10, 1976. Device for feeding sand under the wheels of a locomotive.

3. Kamenev N.N. Efficient use of sand for traction trains. M., Transport, 1968, 87 pp.

4. A.S. 1507619, cl. B61C 15/10, 1989. A device for feeding sand under the wheels of a locomotive.

Claims (2)

1. A device for supplying sand under the wheels of a locomotive, including sand nozzles connected to a sand hopper and through electro-pneumatic valves with a pneumatic line, sand supply pipes with nozzles, characterized in that the latter are installed with the ability to direct a sand air stream to the central part of the track of the wheels of the locomotive and in the direction of the wheel flange interacting with the working fillet of the rail head. 2. The device according to claim 1, characterized in that, in order to reduce the consumption of sand and increase the traction of the locomotive when moving along curved sections of the rail track, the sand feeding nozzles, depending on the direction of rotation of the rolling stock, operate in a mode that provides sand only the central part of the zone of contact of the wheel with the rail on the inner rail and in the contact zone (working fillet) on the wheel flange on the inner side of the outer rail.

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