The method of determining the position of the railway track in terms of circular curves

 

(57) Abstract:

Usage: definition of gauge clearance between the crest rail and the wheel with the registration of rolling stock in the circular curves of the railway track. The inventive method is that when moving the vehicle along the path measure the angles of rotation of its driving trucks relative to the base vehicle. These undercarriage without Rysbekov wheelset axles, is set to the maximum skew and define a rut, limited the side of the head of the outer rail and a crest wheel ratio, ukazannogo in the formula. 3 Il.

The invention relates to railway transport, in particular to methods of continuous recording track clearances when copying rolling in a circular curves railroad tracks, and is intended for use in scientific studies of geometric fit, processes of interaction between the crew and the railroad tracks, and control the rail of railroad track in the plan.

There is a method of determining the position of the railway track in terms of circular curves, namely, that Opredelenie the angles of rotation of the bogie relative to the base vehicle [1] . The disadvantage of this method is that the measuring of the position of the tramways in the plan and gauge requires the use of special pasture with a special track measurement (single axle trucks) are complex mechanical system with the use of pneumatic cylinders in addition, in the measurement process requires constant contact of the rollers with the rails, which significantly reduces the reliability and efficiency of the measuring system. To ensure measurement requires six sensors. It is necessary to pay attention that this car potenzmittel able to register the curves are plots of small size by tram, and not crooked ways IPU and Protransporte, the car is not capable of logging curves over 1200 m in Addition, the position of the trolley on the track indefinitely due to the presence of a free gap - the difference in width between rail and wheel track. To compensate for the uncertainty of the position of the truck applied the sensors linear uniaxial trucks. Is trying to make the algorithm external and internal threads of the way. But this method does not take into account the uncertainty in the kinematics of the device and track gaps in the curve.

sebnem wheel.

This is achieved by the fact that in the method of determining the position of the railway track in terms of circular curves, namely, that determine the position of the path in terms of moving vehicles, including two trucks, and measured the angles of rotation of the bogie relative to the base vehicle, truck without Rysbekov wheelset axles, is set to the maximum skew and define a rut, limited the side of the head of the outer rail and a crest wheel ratio

= and (C-p, where is the total gap by widening the track;

and half the base truck;

p- the angle of rotation of the front truck in rads;

C- the angle of rotation of the rear truck, I am glad.

In Fig. 1 shows a block diagram of the device of Fig.2 is a connection diagram of a contactless sensors of this device; Fig.3 is a diagram of the operation of this device.

P R I m m e R. When measuring the gauge of the gap in the circular curves of the railway track in terms of using locomotive TGM-4, in which the carriages are not cross Rysbekov wheelset. The undercarriage of this vehicle are in the position of maximum misalignment when MT frictional forces between wheels and rails. On the trucks of the locomotive set housing contactless inductive sensors type ID 3IYX, motile rods which are fastened to the frame body, measure the angles of the axes of the trucks relative to the axis of the base of the locomotive.

According to the scheme (Fig. 1) proximity sensor 1 produces an electrical signal proportional to the rotation angle of the front of the truck relative to the car body of the locomotive. The signal is sent to the divider 2 voltage of the operational amplifier 3, operating in the inverter mode, via an input resistance 4. Operational amplifier 3 is made by the serial scheme, supplemented by resistance 5 feedback. The inverted signal is input to divider 6 voltage across the input resistance 7, the first input of the operational amplifier 8 mode adder with inverted. The sensor 9 generates an electrical signal proportional to the angle between the axis of the rear truck and the axle body of the vehicle relative to the king pin of the rear truck. The signal is sent to the divider 10, the voltage of the second input of the operational amplifier 8 through the input resistance 11. Operational amplifier 8 is executed by the serial scheme, supplemented by a feedback resistance 12. Output operationnal the part of the body. The electrical signal at the output of the device is proportional to the gauge gaps in the circular curves of the railway track in the plan. Unit 13 registration registers the value of the MCPFE gaps in circular curves railroad tracks in the plan as a function of time or a passable way. A device that implements the method for determining the gauge of the gaps in the circular curves of the railway track in plan, has a power connection unit non-contact sensors to the vehicle.

Sensors 1 and 2 are connected to the battery 14 of the vehicle through the static Converter 15 for receiving an AC sinusoidal voltage and distribution transformer 16. Each sensor is connected to the individual rectifier signal of the rotation angle of the truck, the sensor 1 to 17, the sensor 9 to 18.

In this case, when the registration of the vehicle in curved track sections, where the 19 outer thread 20 internal thread of the track, the frame 21 of the vehicle undercarriage trucks 22 and 23, the front pair of wheels which run over the outer thread of the rail track, and the rear wheel pair get guides efforts on the part of the internal thread, is installed in Polo is Techniki 25 contact sensors through the hard kinematic links 26 are connected to the frame 21 of the vehicle.

The device is made in the case HH mm, to which using a shielded cable for connecting the outputs of two inductive sensors. As a recording unit used savesee device N-307-5. All equipment proposed method implemented in the device, except for the sensor was mounted in the cab.

The method has the mathematical justification.

It is known that the rotation angles of the front and rear axles relative to the base vehicle is determined by the formula

tgpp= (1)

tgCC= (2) tgpptgCCbecause the rotation angle does not exceed a value of 5aboutWith, wherep- the angle of rotation of the front truck;

C- the angle of rotation of the rear truck;

L/2 - half of the base of the vehicle;

and half the base truck;

xppole length of the front truck;

xC- pole distance in the rear of the truck;

R is the radius of the curve of the railway track.

When the position of the vehicle in the curve at the position of maximum warp, xp= xC= X. Find the pole distance from the expression (1)

x = L/2 + a - Rp(3) From the formula (2) determine the range of the circular curve

R = (6)

For truck values pole distance is

x=a+R (7) where is the total gap by widening the track. We substitute the expression (6) into (3) we obtain

= a (8) From the expression (7) we find the values of the total gap by widening:

= (9) Substituting (8) into (9) we get

= (10)

Taking into account the expression (6) in the expression (10) the clearance value is

= and (C-p) (11)

Thus the expression (11) shows that the value of the total gap by widening in the radial curve of the railroad tracks in the plan directly proportional to the difference between the value of the rotation angles of the front and rear trucks, between their longitudinal axes and the axis of the frame of the vehicle, and the size and half the length of the base of the truck.

Using the proposed method provides the following advantages:

the proposed method is implemented in the device registration gauge clearances, does not require the manufacture and use of special-purpose cars and, in particular, measuring trucks, and used only for the measurement of parameters by tram, but also by the IPU. The reliability of the measuring device provided by the absence of mechanical components and the use of modern electronic equipment. The poet is there a possibility of installation of the device on all types of railway vehicles, having two rotary undercarriage;

given that the cost of operation potenzmitteln car for 8 hours of work is 290 rubles (data Management North-Caucasian Railways), these costs are completely eliminated if you use the method implemented in the proposed measuring device;

working speed of movement potenzmitteln wagon 5 km / h for 8 h car diagnose the track with a length of 40 km, which reflects the closure of the ferry with a length of 40 km for 8 h, and this leads to failure of train schedules. According to the Department of North-Caucasian Railways, the failure of train schedules 1 h brings a loss of $ 13-14 thousand rubles So for 8 h, with the window in traffic loss is 32 thousand rubles These costs are completely eliminated using the proposed method, since the device is located on the locomotive, which is involved with the train and moves on driving operational speed.

The METHOD of DETERMINING the POSITION of the RAILWAY track IN terms of CIRCULAR CURVES, namely, that determine the position of the path in terms of moving vehicles, including two trucks, and measured the angles of rotation of the bogie relative to the base transport sredstva crest rail and wheel, truck without Rysbekov wheelset axles, is set to the maximum skew and define a rut, limited the side of the head of the outer rail and a crest wheel ratio

b = a(C-p)

where b is the distance between the crest of the brace and the outer rail of the circular curve with the broadening of the wheel;

a - half base truck;

C- the angle of rotation of the rear truck;

p- the angle of rotation of the front truck.

 

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