How to define a parameter characterizing the state of the system, the wheel - rail system, and device for its implementation

 

(57) Abstract:

Use: for determination of the parameter characterizing the state of the system "wheel-rail". The inventive method lies in the fact that the angles between the longitudinal axis of the frame of the vehicle and the longitudinal axis of the chassis trucks, the length of the base vehicle and half the length of the truck to determine the parameter characterizing the state systems "wheel-rail", expressed as the angle of crowding tire of a wheel on a rail, and the device contains two angle sensor 13 and 14, three voltage divider 15, 16 and 21, the inverter 19, the adder 23 and the recording unit 25. 2 C. p. F.-ly, 3 ill.

The invention relates to the field of railway transport, in particular to measuring devices for measuring angles of nabahani tires wheelset on the rail in curves railway sections and is intended for use in research processes of interaction between the crew and the railroad tracks.

A known method of measuring the angle of rotation and the device for its implementation [1]

The method consists in the fact that on the basis of izmerennykh in two reference systems, rigidly connected with the facilities of the 4-component, etc) the respective angle between kinematically related objects the angle of rotation is determined by the formula

< / BR>
where the components of the linear acceleration vector in the first coordinate system;

the components of the linear acceleration vector in the second coordinate system.

As the acceleration vector is selected vector acceleration of a point On a General point of a flat rotating pairs.

Device for measuring the angle containing associated with the controlled object in the process measurement transducer accelerations and schema processing signals, in addition, the Converter is implemented in the form of two two-component linear accelerometers, each of which is mounted on one of the objects forming the kinematic pair so that their axes of sensitivity are perpendicular to the axis of relative rotation of the kinematic pair, and their centers lie on this axis.

A disadvantage of the known method and device is that they do not provide high precision measurement of angular values, because the measurement is based on the definition of the vector of linear acceleration, which is a relative characteristic of the angular displacement, in addition, the method and apparatus is implemented solely on the objects that form a kinematic pair, which excludes in the SS="ptx2">

Analogue also claimed is a method of measuring angular measures and the device for its existence [2] consists in the fact that the angular measure is placed on the base, rigidly associated with the sensor of angular displacements, lead base in rotation, fix the position of the faces measures form a temporary interval, the duration of which is equal to the time interval between the moment of fixation of faces, measure the angle of rotation of the base within the specified time interval and repeat the operation angle measurement bases as long as the measure does not pass a full circle on the base and is determined by the value of the angle of angular measure, as the arithmetic average of the measured values of the rotation angle of the base.

The device containing the drive to the angular displacement on the shaft of which is fixed measuring table and the pulse sensor of angular displacements photovoltaic autocollimator and computing unit corresponding to the inputs of which are connected to the outputs of the PV autocollimator and sensor angular movements, in addition, the device has a base that is installed coaxially with the measuring table with the possibility of rotation relative to it, stepper drive ploppables entrance stepper motor, as computer unit made in the form of block averaging measurements dexterous output connected to the input unit. The above method and apparatus that implements it, measure stationary fixed angular measure rather complicated construction of the device, but this way it is impossible to measure angles arising between the crest of the brace of the pair of wheels and the rail when the vehicle in curves railway sections.

The known method and device is used to determine the parameter characterizing the state of the system wheel rails and controlled curves in the railway sections [3] are selected as the prototype of the proposed.

In the known method and device, the controlled parameter is the curvature of the rail route that is determined based on rotation angles of the front and rear bogies, the magnitude of which, though in a small degree, depend on the wear of the wheel system and the rail.

The method consists in the fact that with the help of a vehicle with front and rear suspension trolleys which move in a circular curve, the position of maximum warp, measure the front and rear horizontal angles krugovoy curve according to the formula

< / BR>
Thus, led the office of the radius of the circular curve of the railroad tracks in the plan depends on the magnitude of the rotation angles of the trucks relative to the base vehicle and the magnitude of the base itself. Device for measuring the curvature of the path contains the sensors installed on the undercarriage bogies implement an electrical signal proportional to the rotation angle of the trucks.

Electrical signals from the sensor into the voltage dividers and functional converters is fed to the input of the operational amplifier working mode of the adder. At the input of the operational amplifier boosts the signal proportional to the sum of the angles of rotation as a function of the length of the base vehicle. The electric signal output device is a characteristic curvature of the rail track.

A disadvantage of the known method and device is that the measured parameter of the curvature of the path depends on the degree of wear of the system wheel - rail, and fully reflects the geometric and dynamic parameters of the interaction of the way and rolling stock to which it relates angle of crowding ridges tires wheelset on the frame in curves.

In the proposed sposobem in the measurement of angles of rotation of the bogies of the vehicle, relative to the pins between the axial lines of trucks and the axis of the frame of the vehicle and measuring the length of the base of the vehicle, according to the invention, measure the length of trolleys mounted on the wheelset, then the truck is in motion, set to the maximum skew and, after measuring the angles trucks, according to the measurement results, determine the angle of crowding that occurs between the wheel tread and rail according to the formula

< / BR>
where the angle of crowding ridge brace of the pair of wheels on the rail;

L the base of the vehicle;

a half base truck;

vpthe angle of the front truck;

Cthe angle of rotation of the rear truck.

The inventive method can be implemented using a device containing a divider, adder hardware, rotation angle sensors and functional Converter, functional Converter is implemented using an inverter and an additional voltage divider, in some manner connected with other circuit elements.

The method has the mathematical justification. It is known that the rotation angles of the front and rear axles relative to the base transport credot not exceed a rolling 5o,

wherepthe angle of the front truck;

Cthe angle of rotation wodna truck;

half of the base of the vehicle;

a half base truck;

CP pole length of the front truck;

XS pole distance in the rear of the truck;

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

It is known that the position of maximum misalignment when the passing vehicle curves railway sites pole distances of the front and rear axles will be the same, i.e., CP XS X.

Find the value of pole distance from the expression (I)

< / BR>
From the formula (2) determine the value of R

< / BR>
Substituting (3) and (4) and simplifying, we get

< / BR>
From the expression (5) find the radius of the curve /4/

< / BR>
Given that when the vehicle is in a curve at the position of maximum warp, are set to pole distance

< / BR>
where the total gap taking into account the broadening gauge (=e+2), substituting the expression (6) into (3) we obtain

< / BR>
From the expression (7) find the value of the total gap taking into account the broadening of the line

< / BR>
Substituting (8) into (9) we get

< / BR>
Using the expression (6) in the expression (10) the clearance value is

< / BR>
The angle is 13) find

< / BR>
Substituting (6) into (14) we get

< / BR>
Thus from the expression (15) shows that the angle of crowding depends on the difference between the value of the rotation angle of the trucks in the functional dependence of L base vehicle, a half of the base truck and constant coefficient.

Consider the work of the proposed device that implements the method for continuous registration of the corners of nabahani.

The device is in a static state when the vehicle is in the curve of the track (Fig. 1), where 1 frame front undercarriage; 2 - frame in the rear of the undercarriage; 3 wheelset running trucks; 4 rail gauge; 5-axis frame chassis trucks (AB and AB); 6 the frame of the vehicle; 7 the axis of the frame of the vehicle; 8 inductive sensor (stator); 9 - core inductive sensor (rotor); 10 hard kinematic relationship of the rotor to the frame of the vehicle; 11 tangent held in point contact system of wheel-rail relative to the rail longitudinal direction of the rail); 12 rolling direction of the wheel (perpendicular to the rolling wheel pair); L the base of the vehicle; R is the radius of the axis of the track; the angle of crowding of the crest of the bandage on the rail; vpthe angle of the surface to the SUB> the angle of rotation of the rear truck, measured between the axis of the rear frame of the truck and the axle of the vehicle chassis.

In the circular curve of the trolley are in the position of maximum warp, in which the first pair of wheels are pressed to the outer rail, and back to the inner rail.

Axis less chassis trucks 5 coincide with the axis of the track described by the radius R. But the Central axis of the frame of the vehicle 7 does not coincide with the axes of RAM running trolleys 5, and hence with the axis of the rail track. The deviation of the axes of the frame of the chassis trucks 5 from the axis of the frame of the vehicle 7 is fixed in a non-contact sensors, which represent (see Fig.1) the coil of the stator 8, moving in her core rotor 9, the coil connected input windings to a source of alternating voltage, and the sensor housing is rigidly attached to the frame of the undercarriage 1 and 2, and the rotor 9 has a rigid kinematic connection 10 to the frame of the vehicle 6.

The sensors that can detect the angles of rotation, set directly on the rotary angle of the undercarriage of trucks and implement an electrical signal proportional to the rotation angle of the front undercarriagepand rear undercarriageC. The angle of NAS and line perpendicular to the rolling wheel pair and is defined in function of the rotation angles of the trucks.

Under the base of the vehicle is understood miscompile the distance between the undercarriage bogies.

Diagram of the device for measuring angles of crowding is shown in Fig. 2, where 13 contactless angle sensor front truck; 14 non-contact angle sensor rear truck; 15 voltage divider signal of the rotation angle of the front truck DN-1; 16 voltage divider signal of the rotation angle of the rear truck DN-2; 17 input resistance sensor signal front truck; 18 input resistance sensor signal rear truck; 19 is an operational amplifier operating in the inverter mode; 20 the resistance of the feedback inverter; 21 voltage divider inverted signal DN-C; 22 output impedance of the signal inverter; 23 operational amplifier working mode of the adder; 24 the resistance of the feedback adder; 25 hardware recording device.

Electrical signalspandCfrom rotary sensors, the front of the truck 13 and the rear of the trolley 14 serves respectively to the inputs of voltage dividers 15 and 16. The output of the voltage divider 15 th connection 20, connected to the voltage divider inverted signal of the rotation angle of the front of the truck 21 and output through the resistance 22 is connected to the input of the operational amplifier working mode of the adder 23 and the resistance of the feedback adder 24. The output of the voltage divider 16, a signal characterizing the rotation angle of the back of the truck, through the input resistance 18 is connected to the input of the adder 23. The output of the adder 23 is connected with the input of the hardware recording unit 25.

The output of the operational amplifier working mode summation is generated an electrical signal proportional to the sum of the angles of trucks as a function of the length of the base vehicle, half of the base truck and ratio 1/2.

The electrical signal at the output of the device is the characteristic angles of crowding ridges tires wheelset on the rail in curves railway sections.

The measured value can be recorded any hardware part, on the ribbon diagram or magnetic media.

In Fig. 3 shows the connection diagram (energy block) device to measure angles of crowding ridges bands of Coles the user (SP); 28 distribution transformer (T1); 29 contactless inductive angle sensor front truck (BC1); 30 contactless inductive angle sensor rear truck (BC2) 31 - resistance ( R1, R2 ); 32 rectifier signal of the angle sensor front truck (1); 33 rectifier signal of the angle sensor in the rear of the truck (2); 34 block diagram of the device.

Inductive sensors BC1 and BC2 is connected to the battery (GB) 26 of the vehicle, through the static Converter 27 for receiving an AC sinusoidal voltage and distribution transformer 28. Each sensor is connected to the individual rectifier complex signals of the rotation angles trucks BC1-29 to 32 and BC2-30 to 33. A rectifier device that implements this method 34, the Rectified signals are sent to a block diagram of a device implementing this method 34.

An example of the contact execution. When measuring the angle of crowding tires wheelset on the rail in curves, was used locomotive TGM-4, in which the undercarriage had no cross Rysbekov wheelset. On the frames of trucks install the sensor housing type ID-31 UHLS, motile rods which, through the hard kinematic Dolnymi axes running trolleys relative to the pins.

The device is made in a metal case dimensions 240 x 220 x 120 mm, to which a shielded cable is used for connecting the outputs of the sensors. The device includes voltage dividers, the input resistance of the amplifier operating in the inverter mode with the impedance of the feedback amplifier working mode summation with resistance feedback, a power unit consisting of a statistical transformation to convert DC voltage into AC power distribution transformer, resistors and rectifier units. The hardware contains the evaluation unit N-307-1 for the connection was used dual conductor. In the proposed device is fixed to the base value of the vehicle, half base trucks. In the process of movement is measured by the angle of crowding tires wheelset on the track in function of the rotation angles of the trucks.

Mobility device allows you to secure it fixed anywhere in the vehicle, the only exception is the recording device, which increases horizontally for visual and sampling using another detection apparatus can further simplify the system RV curves has several advantages, which is expressed not only by the small size, simplicity and reliability, but also the possibility of installation on all types of railway vehicles, having two rotary undercarriage. The proposed method implements the ability to measure the angle of crowding, prototype and other literary sources cited there are no measurements. Therefore, to carry out an objective analysis of the advantages of the proposed object with prototype impossible.

Rationale technical and economic efficiency of the invention is difficult, because the angle of crowding ridges tires wheels pap on the rail, linearly dependent on flange wear of tyres wheelsets and rails.

The measurement was performed with the help of a locomotive moving at operational speed, which eliminates the possibility of disrupting movement of trains, the cost of the devices does not exceed 100 rubles costing components. This technique ensures accurate measurements recorded parameter with a significant reduction in the time.

This invention will allow to obtain a reliable measurement of the body of the process control system wear system wheel-rail. For example, only the elimination of izdanje is raceno 12000 thousand rubles Therefore, the development carried out to determine the geometry of the system touch the wheel rail lead to the identification of optimal parameters of rims wheelsets and rails, which in turn eliminates the above costs, and can be attributed to the net economic effect.

1. How to define a parameter characterizing the state of the system wheel rail, when the vehicle along a curved section of track, which consists in the fact that when the vehicle with the front and rear chassis trucks, along a curved section of track determine the angles between the longitudinal axis of the frame of the vehicle and the longitudinal axis of the chassis trucks and the length of the base of the vehicle, characterized in that to determine the length of half the base of the truck and determine the parameter characterizing the state of the system wheel rail, expressed as the angle of crowding tire of a wheel on a rail by the formula

< / BR>
where the angle of crowding tire of a wheel on a rail,

a length of half the base truck,

L the length of the base vehicle,

vpthe angle between the longitudinal axis of the frame of the vehicle and the longitudinal axis of the front truck,

Cthe angle between the longitudinal Ermera, characterizing the state of the system wheel rail, when the vehicle along a curved section of track that contains the sensors of the angles between the longitudinal axis of the frame of the vehicle and the longitudinal axes of the front and rear bogies connected through functional transducers made in the form of voltage dividers, with the inputs of the adder, the output of which is connected to the input of the recording unit, wherein the functional Converter associated with a sensor of the angle between the longitudinal axis of the frame of the vehicle and the longitudinal axis of the front truck, equipped with an additional voltage divider and an inverter, whose input is connected to the output of the first voltage divider, and the output to the input of the voltage divider, and the input of the first voltage divider and the output of the additional voltage divider formed respectively the input and output of the specified functional Converter.

 

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