Device for checking wheels of railway rolling stock

FIELD: transportation.

SUBSTANCE: in claimed device, a rolling wheel pair of railway rolling stock passes through a space-limited magnetic field, which is formed by means of railway rails by which a corresponding railway vehicle is guided. Between the railway rails (2; 3), there is an electromagnet (4; 5), on which in this case a measuring winding for record magnetic flux changes is arranged. Wherein the railway rails (2; 3) are connected by means of an electromagnet-shaped cross member (6), on which the measuring winding (5) for recording the magnetic flux changes is arranged.

EFFECT: possibility to check railway rolling stock wheels in various embodiment versions in a short time, in particular, checking railway rolling stock wheels can be carried out in the motion mode.

6 cl, 2 dwg

 



 

Same patents:

FIELD: measurement equipment.

SUBSTANCE: device comprises at least two three-component sensors of induction of magnetic field, arranged on different levels by height relative to the pipeline, the first and second amplifiers, an analogue-digital converter (ADC), a device to determine difference of values of magnetic field induction by axes X, Y, Z, a controller, a memory unit and an information display device. Additionally the device comprises a unit of value detection and direction of full vector of magnetic field induction, measured by the first three-component sensor, a unit to detect value and direction of full vector of magnetic field induction measured by the second three-component sensor, and a unit of detection of difference and angle between full vectors of induction of the magnetic field, measured by the first and second three-component sensors.

EFFECT: possibility to establish full and true picture of magnetic field fluctuation, including their value and shape.

2 dwg

FIELD: measurement equipment.

SUBSTANCE: extended structures during their operation, which are made from homogeneous ferromagnetic material and have the profile section of a symmetrical shape, are magnetised so that poles of symmetric magnetic field are formed on the symmetry axis of the profile section throughout the length of an observation object. Assessment of available defects or mechanical stresses in zones of the profile section of the structure is performed as per the change of values of electrical voltages continuously taken from inductive sensors installed in one and the same plane in pairwise symmetrical points of the section at its boundaries at movement of these sensors along the length of the structure profile.

EFFECT: possibility of on-line detection of defects and assessment of local stresses in material of extended structures by means of automated mobile hardware.

1 dwg

FIELD: physics.

SUBSTANCE: method comprises inspecting a portion of a railway line using a magnetic flaw detector mounted on a flaw detector car; identifying defects and structural components (bolt and welded joints of rails, metal rail plates etc), signals from which and positions of which are stored in a test card; using data on the structural components of the railway line for navigation during ultrasonic flaw detection of the same portion of the railway line; detailed analysis of objects identified by the magnetic flaw detector using an ultrasonic flaw detector; correcting the test card based on the flaw detection results.

EFFECT: high accuracy, quality and rate of detecting defects on rails.

2 cl, 5 dwg

FIELD: instrumentation.

SUBSTANCE: proposed device consists in measurement of gradients of permanent magnetic field components actual in time at several levels with the help of at least three strips of magnetic resistors displaced by operator along pipeline axis. Two strips of magnetic resistors are arranged vertically and one strip is fitted horizontally. Every strip is composed of three three-component transducers. Gradients (∂Xi/∂y, ∂Yi/∂y, ∂Zi/∂y) are computed proceeding from recorded data for every component of the transducer for time interval defined by hardware performances, that is, at the rate of 6256 measurements a second. Said gradients are defined as the difference (Xi+1-Xi)/Δy, (Yi+1-Yi)/ Δy, (Zi+1-Zi)/ Δy at Δy→0. Application of gradients obtained in small time interval allows getting rid of errors related with unstable operation of transducers, change in their sensitivity, increase in scatter of transducer parameters and their dependence upon temperature.

EFFECT: fast response, accurate detection of buried pipeline defects, better operating performances.

4 cl, 2 dwg

FIELD: machine building.

SUBSTANCE: in an industrial detector for conveyor lines the area of receiving coils is many times less than the area of a metal detector "window". Signals from receiving coils arrive to inlet amplifiers (separate for each coil), from the outlet of the amplifier the signal is sent to a summator, where it is summed with the "compensation" signal, arriving from a digital to analog converter (DAC), which makes it possible to compensate the signal x.x., then the signal arrives to an analog to digital converter (ADC). Data from all ADC, a speed sensor and another receiving coil connected in parallel to the transmitting one, and also data from the scales (optionally) is sent to a unit of a central processor, in which metal presence is detected. Also in parallel to the transmitting coil there is a calibration loop connected, which is periodically closed, making it possible for an instrument to independently perform automatic inspection and automatic calibration. In the considered metal detector the excitation coil connected to an AC generator creates unresolved magnetic field of excitation acting as the investigated object, moving through the control zone.

EFFECT: increased sensitivity of a metal detector and reduced impact of external electromagnetic environment, which causes reduction of quantity of false actuations.

1 dwg

FIELD: measurement equipment.

SUBSTANCE: invention relates to non-contact diagnostics of metal tubes during operation. The inventive method comprises determining the location and depth of the pipeline at the test site, installation along the pipeline of at least two identical sensors for measuring tension (tangential component) of the magnetic field, synchronous recording of changes in the magnetic field caused by stray currents, comparative information processing from all sensors and diagnostic conclusion. The apparatus comprises at least two identical sensors for installation along a pipeline axis, determining the magnetic field, means for linkage at the location, means for determining the depth of the pipeline, a facility of synchronisation of switching and sensor means for recording the magnetic field change caused by stray currents and data processing.

EFFECT: simplification of searching for locations of pipeline corrosion, improving accuracy of fault location.

13 cl, 8 dwg

FIELD: instrumentation.

SUBSTANCE: proposed instrument comprises interconnected power supply 1, locating and control unit 2 and set of magnetic pickups 3. Said set of magnetic pickups is composed of permanent magnets arranged radially in their crown to interact by their magnetic field with Hall transducer 302. Said instrument is displaced inside the pipeline, over its entire length, to control pipeline thickness and to detect whatever holes so that distance whereat detected holes are located starting from initial point is determined as well as their position in pipeline circumference. All measurements are a part of online process executed in instrument displacement inside said pipeline.

EFFECT: info can be loaded in computer to be available for use and decision making relative to pipeline integrity.

2 tbl, 37 cl, 10 dwg

FIELD: machine building.

SUBSTANCE: in a diagnostics method at least 18 single-component sensors of a constant magnetic field are used as sensors of the field; compensation of action on measurement results of fluctuation of constant magnetic field of the Earth is performed. Mathematical processing of measurements is performed based on sum and difference of signals of coaxial components of the field. As mathematical processing, tensorial processing of a matrix of gradients is used; the above matrix is composed based on measurement results so that linear, quadratic and cubic invariants are obtained and components of magnetic moments of defect anomalies obtained on the basis of a solution of an equation system are calculated. At processing of measurements there excluded from processing are intervals of measurement recording, which exceed the load action time determined as to exceedance of amplitudes of threshold values of measured signals.

EFFECT: improving accuracy of determination of a pipeline run trajectory, detection, geometrisation and ranging of defects of metal and insulation.

6 cl, 5 dwg

FIELD: machine building.

SUBSTANCE: essence of the invention consists in use of a new navigation system including a sensor unit that consists of two groups. Each group includes three single-component sensors; besides, similar axes of sensors are parallel while axes of sensors of each of the groups are orthogonal; besides, axes of two sensors in each of the groups are parallel to each other and to direction of movement and located in horizontal plane. Measurement of components of a variable magnetic field is performed continuously; angles of rotation and inclination of the sensor unit, as well as a value of offset of the sensor unit from a projection of pipeline axis are calculated based on measured components. Commands to the operator are supplied in the form of voice instructions using the language with which the operator is familiar based on comparison of signals corresponding to angles of rotation and inclination, as well as values of offsets as per the pre-determined threshold values of those signals. Information on technical state of the pipeline is received based on ratios of orthogonal components measured along horizontal and vertical axes of each of the groups.

EFFECT: improving accuracy of a routing method; reducing power consumption of the device and increasing labour intensity of the operator at use of the proposed method and device.

4 cl, 3 dwg

FIELD: transport.

SUBSTANCE: invention relates to railway transport and can be used for control over mounted axle conditions in motion. In compliance with this method, after wheel 9 runs on rail joint 4 circular wave stars propagating over wheel 9 to produce acoustic wave to be emitted therefrom and recorded by converter 1. Said converter converts acoustic wave into electric signal. In the absence of cracks signal duration and frequency will have a definite magnitude. In case there are cracks in said wheel said parameters, that is duration and frequency decrease to indicate inadmissibility of further use of said wheel. Then, wheel 9 rolls on section 5 its length in this case being equal to half the circumference of the wheel whereat acoustic pickups check the section surface for tread quality.

EFFECT: simplified design, better check quality, lower power consumption.

8 cl, 3 dwg

FIELD: machine building.

SUBSTANCE: according to the method for diagnostics of technical condition of rotor units, probability ratios of false alarm and of errors of defect omission are set, lower and upper critical values limiting the uncertainty zone are set, parameters of rotor unit device vibrations are measured as well the value of by-factor, for example, shaft rotation speed. Then the values of diagnostic characters are determined, and compared to the critical values. In case the diagnostic character falls within the uncertainty zone, the additional test is performed at another value of the by-factor, for example, at increased rotation speed. The technical condition of rotor units is identified basing on the results of comparison of the measure diagnostic character values and respective critical values.

EFFECT: increased reliability of diagnostics of rotor units' technical condition.

2 dwg

FIELD: measurement equipment.

SUBSTANCE: bench contains holders (2, 3, 4, 5) of measuring devices located on load-carrying structure (1) under trolley (12), devices (6, 7) for generation and transmission of forces delivered for modelling of load state (determined by operation) to trolley (12), resting its wheels (13, 14, 15, 16) on support points (8, 9, 10, 11) on holders of measuring devices, measuring devices for impact record resulted by modelled states of load on the trolley and/or in support points of its wheels, as well as an analyser for processing of measurements recorded by measuring devices, and controls. For trolley load states modelling, the bench is provided with engine (6) and devices for transformation of torsion moment generated by engine to thrust acting on trolley in direction of load-carrying structure. The bench is designed as a mobile and solid block. Besides analyser and controls, all the rest abovementioned bench elements, including engine and devices, transforming its torsion moment to thrust, are located on load-carrying structure designed in the form of frame stand.

EFFECT: smaller bench dimensions.

11 cl, 3 dwg

FIELD: transport.

SUBSTANCE: invention relates to railway vehicle bogie (3) with at least one mounted axle (4). Note here that wheels (8) of said mounted axle (4) are rigidly coupled by axle (6) and feature wheel profile approximating to conical shape. Transducers (10) are arranged at turning bogies (3). Signals are isolated from those generated by transducers (10) which correspond to sinusoidal run of bogie (3) mounted axle (4) based on the profile approximating to conical shape of wheels (8). In compliance with this invention, sinusoidal run frequency (f) relative to boundary conditions is defined as appropriate vehicle speed (v) and compared with the magnitude or range of said sinusoidal run frequency (f) inherent in available boundary conditions and stored in memory. Note here that deflection of sinusoidal run frequency (f) from the latter. Invention relates also to device that implements said method.

EFFECT: higher accuracy and quality of control.

14 cl, 5 dwg

FIELD: transport.

SUBSTANCE: invention relates to method for rail vehicle ride performance control. Proposed method includes following steps: - identification of at least one significant event or combination of several significant events within measuring signal time characteristic at which measured value exceeds preset minimum value, as well as identification of time point when this significant event has taken place; - frequency-response characteristic generation from time characteristic of measuring signal upon event, herewith, frequency-response characteristic is generated for certain time interval (ta) starting from event time point; - comparison of generated frequency-response characteristic with at least one reference frequency-response characteristic being stored in memory; - evaluation of wheelset vibrational properties depending on deviation of generated frequency-response characteristic from at least one reference frequency-response characteristic being stored in memory.

EFFECT: improvement of generic method and device in such a manner that provides more reliable detection of damages and defects of rail vehicle wheelset with lower expenditures connected with signal processing technique.

15 cl, 3 dwg

FIELD: physics.

SUBSTANCE: method involves magnetising the lateral surface of a railway wheel in a rotating magnetic field and wetting the inspected sector, superimposed with the wetting zone, with a magnetic suspension. Inspection cycles are carried out while magnetising and wetting, where each cycle includes turning the wheel about its axis in order to select the corresponding inspection sector from the wetting zone and superimpose it with the inspection zone corresponding to the position of the inspection sector. In such a position, the surface of the inspection sector is fixed in a frame and recorded, using a computer program, in a recording medium in form of a pattern having sector boundaries. The inspection cycles are repeated until the surface of each inspection sector is fixed in the corresponding frame. Magnetisation in the a rotating magnetic field is carried out using a corresponding apparatus having a stand with upper and lower cross-beams. The upper cross-beam is fitted with two solenoids, each in form of a frame with a flat-topped shape.

EFFECT: shorter inspection time and high degree of reliability of results of inspecting a railway wheel.

4 cl, 4 dwg

FIELD: testing equipment.

SUBSTANCE: on the basis of using the methodology of previous detection of total traction of a propulsion device (PD) according to the results of the flight tests (FT) of the aircraft (AC) they determine aerodynamic coefficients Cx and Cy. This is achieved by building a system of measurements and processing of their results, which makes it possible to separate the force of traction and aerodynamic force according to the "physical" principle and organise the iteration process of measurement results processing. For this purpose in process of flight they measure overloads nx1 and ny1 to connected axes ox1 and oy1. Using the specified aerodynamic coefficients Cx and Cy they calculate the continuously changing angle of inclination of the auxiliary axis, in direction of which the AC is exposed to overload only from the traction force provided that the projection of the vector of total aerodynamic force is equal to zero. Using the measured values of the overload nx1 and ny1 to connected axes ox1 and oy1 they calculate the overload value, which depends only on the PD traction force. The aerodynamic components of the overload are corrected due to the iteration process according to the overload with account of the confirmed values of sought for values P, Cx, Cy.

EFFECT: increased accuracy of detection of total traction of a PD and aerodynamic coefficients Cx and Cy.

3 dwg

FIELD: transport.

SUBSTANCE: test bench comprises bed with supports and struts, railway wheel engaged with motor shaft and staying in contact with track simulator. The latter represents rail length thrusting against roller supports and is locked by springs in lengthwise direction. Besides, test comprises mechanism to load the wheel radially and vertically mounted on struts to act of rail length. Also, it includes mechanism to load the wheel horizontally and laterally composed of seated support, spring and adjusting screw. Note here that test bench is equipped with traction reduction gearbox of actual railway traction reduction gearbox design to engage the wheel with motor shaft. Rail length is located above the wheel and clamped on roller bearing arranged on struts and spring-coupled with mechanism to load the wheel radially and vertically.

EFFECT: expanded testing performances.

5 cl, 4 dwg

FIELD: transport.

SUBSTANCE: proposed device comprises measuring roller rigidly fitted on axle rotating in two arms of frame coupled with mechanism loading said measuring roller. Device is furnished with L-like bearing bracket. Said frame features "Ш" shape. Said measuring roller is coupled aligned with measuring torsion shaft of torque transducer mounted along with measuring roller in "Ш"-like frame arms. Measuring roller loading mechanism is made up of coaxial cup accommodating loading spring and pressure pickup aligned therewith and coupled via hinged with "Ш"-like frame. "Ш"-like frame and roller loading mechanism are pivoted to one arm of L-like bracket. Another arm of the latter is secured on mounted axle box.

EFFECT: higher quality and precision of determination.

3 cl, 2 dwg

FIELD: machine building.

SUBSTANCE: test bench consists of roller interacting with flange and surface of wheel rolling, of device for wheel pair rotation and braking and of loading device. The loading device consists of independent oil stations with hydraulic distributors, of hydraulic cylinders with rods, on ends of which there are set wedge stops resting on wedge surfaces of rollers holders.

EFFECT: evaluation of strength and resource properties of wheel pairs under conditions of approach of wheel pairs test to real loads effecting wheel pair both on straight sections of railroad and on curvilinear sections with various radius.

2 cl, 2 dwg

FIELD: the invention refers to measuring technique.

SUBSTANCE: the stand for diagnosis of the trucks of passenger cars has the base of foundation (2) with conic surface (3), on which through a body of rolling motion (4) a supporting plate (6) with supporting rollers (9) interacting with the wheels (10) of the truck (11) is leaned. On the supporting plate there is an air cylinder (13) with two-arms levelers (17) and brake shoes (18) capable to contact with the axles (19) of the wheel pair of the truck.

EFFECT: makes it possible to diagnose of the anti-skid arrangements of the trucks.

1 dwg

FIELD: transport.

SUBSTANCE: invention relates to railway vehicle bogie (3) with at least one mounted axle (4). Note here that wheels (8) of said mounted axle (4) are rigidly coupled by axle (6) and feature wheel profile approximating to conical shape. Transducers (10) are arranged at turning bogies (3). Signals are isolated from those generated by transducers (10) which correspond to sinusoidal run of bogie (3) mounted axle (4) based on the profile approximating to conical shape of wheels (8). In compliance with this invention, sinusoidal run frequency (f) relative to boundary conditions is defined as appropriate vehicle speed (v) and compared with the magnitude or range of said sinusoidal run frequency (f) inherent in available boundary conditions and stored in memory. Note here that deflection of sinusoidal run frequency (f) from the latter. Invention relates also to device that implements said method.

EFFECT: higher accuracy and quality of control.

14 cl, 5 dwg

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