Device for measuring the profile of a wheel of a rail vehicle
(57) Abstract:Usage: when repairing the wheels of railway vehicles. The inventive device includes a housing with a notch 2 for the crest of the measured wheel 19, the spring-loaded probes 3 and 4 to communicate respectively with a crest wheels and the surface of the ski, and the measuring body of the indicator 14, the constant current source, two resistors, the movable contact of each of which is rigidly connected to respective of the probes 3 and 4, amplifier, analog-to-digital Converter and spring contacts 10 and 11 for engagement with the vertical surface of the wheel flange, connected in series in the circuit between the DC source and the indicator 14. The amplifier output is connected to the first input of the analog-to-digital Converter, the movable contacts of the potentiometers in the circuit between the amplifier output and the first input of the Converter, the output of which is connected to the indicator, and the second input of the inverter is connected to is connected to the positive pole of a DC input of the amplifier through the switch with rheostats. 4 Il. Known sliding the template with double counting, reduced Dunai vertical plane. In case of a deviation of the profile of the measured wheel is generated from the reference signal of the error, which is used to determine the wear of the wheel. The probe is placed movably in the vertical carriage is moved in the horizontal direction by using a stepper motor, torque the screw shaft, the engagement with the carriage. A stepper motor mounted on the bracket, a vertical rack which when measuring pressed against the vertical surface of the wheel rim.However, the task of repair and service depot or factory is not the return of the wheel rim in original condition, for example, by welding and subsequent boring working surface for receiving the exemplary profile of the wheel, and getting a new profile by minimum cut him irregularities in accordance with established tolerances, deviations from the ideal profile of the wheel. Because of the complex law of linear dependence between the vertical tolerances and horizontal coordinate data obtained using known devices or sliding template, you need to decrypt before boring pair of wheels, and in the process of its bore, i.e., to perform mathematical preobrazovaniya is to improve the accuracy of measurement.The objective is achieved by the fact that the proposed device is made in the form of a flat design with a cutout for the crest of the measured wheel and provided with a spring-loaded probes, one of which is designed to rest on the surface of the comb, and the other in the surface of the wheel. The rods are rigidly connected to the moving contacts of precision potentiometers electrical signal which, after amplification and conversion in the analog-to-digital Converter (ADC) are used to control the image on the led display panel.Due to the fact that the position of each probe sensors electrical signal is characterized by a respective voltage level, then any slight movement of the probe through the amplifier electrical signal allows to obtain a high measurement accuracy, as the digital image of the measurement results provides clarity of perception.Comparison with the prototype allows us to conclude that the proposed device is the use of precision resistors, the movable contacts are attached to the probes. Rheostats are included in an electric circuit, amplified at the ADC input, the outputs of which are connected with tx2">A comparison of the proposed technical solutions to similar instruments for measuring sizes allows to make a conclusion about conformity of the distinctive signs of the criteria of the invention "significant differences".In Fig. 1 shows the device described in Fig. 2 - the same, end view; Fig. 3 - the same, the view from the flat side when installed on the crest of the measured wheel; Fig. 4 is an electric diagram of the device.Device for measuring the profile of a wheel of a rail vehicle includes a housing 1 with a notch 2 for the wheel flange. In the lower part of the housing 1 has a groove for rolling permissions spring probe 3, which is intended to rest on the wheel flange when measuring. On the other side of the housing 1 is movably spring-loaded vertical probe 4 to the stop in the working surface of the wheel when the dimension of the car. The probe 3 is rigidly connected to a movable contact 5 precision resistor 6 and the probe 4 is a movable contact 7 precision rheostat 8. Vertical shelf 9 and the bottom plane of the recess 2 has a sunken inside the device electrical contacts 10 and 11, allow reading only when the tight fit of the plane of the shelf 9 to verticalnaya the correct position of the device on the measuring wheel. At the top of the device is reinforced box 12 for accommodating the electric circuit containing the switch 13 to switch the indicator 14 mounted on the opposite side of the housing (Fig.3).The movable contacts (see Fig.4) resistors 6 and 8 connected to the operational amplifier 15, the output of which is connected to the ADC 16, is connected by its output to the LEDs 14. In the same box 12 posted by source 17 DC load resistance 18, the value of which can be adjusted with a screwdriver to set the desired voltage level at the output of the power source 17.The device described is used as follows.To determine the magnitude of the Bicycle wheel 19, the device take in the right hand, as shown in Fig.3, and put it on top of the wheel flange 19 so that the vertical plane of the shelf 9 has been closely adjacent to the vertical wall of the wheel 19, and the bottom plane of the recess 2 relied on the crest of this wheel. Once these requirements are fulfilled, the contacts 10 and 11 closed electrical circuit and the indicator 14 will be lit. Depending on the position of the switch 13 (recessed or not) on the indicator 14 is displayed through the and spring-loaded terminals 10 and 11 is returned to its original position, automatically disabling the power source 17 from the schema template.Technical and economic efficiency of the invention is to improve the accuracy of the measurement value of the car wheels and the thickness of the crest of the wheel that will allow you to minimize the amount of cutting metal with wheels and will lead not only to increased productivity turners and Resetnicov locomotive and car wheels, but will significantly increase the life of wheel pairs. DEVICE FOR MEASURING the PROFILE of a WHEEL of a RAIL VEHICLE, comprising a housing with a cutout for the wheel flange mounted on the body of the probe to interact with the rolling surface of the wheel, the probe to interact with a crest wheel and the measuring body, characterized in that the measuring body consists of a constant current source, two resistors, the movable contact of each of which is rigidly connected with the corresponding probe, amplifier, analog-to-digital Converter, indicator and installed in the cutout of the body spring-loaded contacts for engagement with the vertical surface of the wheel disc and the upper surface of the wheel flange, connected in series in the circuit between the source postoyanno the wheel contacts resistors included in the circuit between the amplifier output and the first input of the Converter, the output of which is connected to the indicator, and the second input of the analog-to-digital Converter connected to connected to the input of the amplifier to the positive pole of the DC source through the switch with rheostats.
FIELD: railway transport; instrument technology.
SUBSTANCE: proposed wear checking system contains optical receiving projection system and converting-and-calculating unit. It includes also car position pickup and car counter whose outputs are connected to inputs to inputs of converting-ands-calculated unit. Optical receiving projection system consists of sets of stereo modules. Rigid structure of each module includes two CCD television cameras and lighting unit. Outputs of stereomodules are connected to corresponding inputs of converting-and-calculating unit. Stereomodules are rigidly installed relative to each other.
EFFECT: enlarged operating capabilities.
3 cl, 2 dwg
FIELD: definition of the diameter of wheel pairs.
SUBSTANCE: the mode and photolaser arrangement for definition of the diameter of wheel pairs of a railway mobile train in conditions of its moving is based on the principle of measuring with the help of a photolaser arrangement of sizes which characterize the changing of the diameter of wheel tread and a degree of deterioration(wear) of the wheel pair band and also is based on the principle of computing the diameter of the wheel according to a wheel rolling circle according to the formula characterizing the changing of the diameter depending on current meaning of a chord of the wheel tread and the magnitude of a wheel tread wear. The execution of the mode of measuring of the chord and of the wheel tread wear is made by way of using of laser sources of light installed along one side of the track, horizontal and vertical photoreceiving mould "toolbars" installed on the other side of the inset in the rail and the track. Precision of measuring of geometric sizes of the wheel pair in the range of ±0.1 mm is achieved at the expense of using of laser sources of light and of photoreceivers in the shape of the mould "toolbars".
EFFECT: increases quality of precision of measuring; using of a laser commutation system and reliability of measuring elements under any weather conditions.
4 cl, 6 dwg
FIELD: railway transport; measuring facilities.
SUBSTANCE: invention can be used automatic control of condition of wheelset and its position relative to rail track. According to proposed method of monitoring of wheelset parameters and its position relative to rail track, working surface of wheel is radiated by light and wheel profile and position of wheelset relative to rail track is determined basing on received radiation. Scattered radiation from points on irradiate working surface of wheel is used with measurement of coordinates of said points, and, using received coordinates, completed profile of wheel is formed which is compared with standard profile of wheelset. Basing on results of comparing decision is made on whether wheelset can be operated or should be rejected.
EFFECT: possibility of monitoring irrespective of condition of surfaces under checking.
FIELD: transport engineering; rail vehicles.
SUBSTANCE: invention relates to measuring facilities and it can be used for checking condition of rail vehicle wheels 1. According to propose method, axle-box of wheel 1 to be checked and rail 3 with contrast mark 9 are exposed to flow of radiation, and image is received by radiation receiver. Radiator and matrix receiver are placed at a distance from rail track. Axle box and rail are irradiated with flow in form of train of short pulses with frequency proportional to wheel speed. Position of maximum of correlation functions obtained at correlation of standard fragment of image of axle box or rail mark with image in current frame is determined and changes in radii and parameters of wheel are judged by changes of vertical coordinates of maxima of correlation functions of axle boxes and rail in image frames.
EFFECT: improved reliability, enlarged functional capabilities.
2 cl, 4 dwg
FIELD: railway transport; auxiliary equipment.
SUBSTANCE: invention relates to device for checking condition of wheelsets of rail vehicles. proposed device contains optical measuring unit including optical measuring sensor made in form of laser focused radiation source 1 and optically mated linear radiation receiver 6 and also signal electronic processing unit. Device is furnished with prechamber 3 with nozzle 4 located before source of laser radiation coaxially with source and compressed air supply system connected with prechamber.
EFFECT: enlarged operating capabilities of device in contaminated atmospheres.
FIELD: railway transport.
SUBSTANCE: invention relates to method and devices for detecting slides on wheel roll surface. Surface of wheel is irradiated by laser beam. Information of presence and parameters of slide is found by comparing obtained sequence of profiles of flange top by changed distance between flange top and upper edge of rail. Proposed device contains optical measuring systems 1 and 2 connected with electronic information processing unit 3 arranged at a distance from one another to permit taking measurements of flange profile of one and the other half of wheel.
EFFECT: increased speed and facilitated measurements.
2 cl, 3 dwg
FIELD: railway transport; auxiliary railway equipment.
SUBSTANCE: proposed device for noncontact inspection of wheelset roll surfaces in motion has roll surface check pickup 4 of wheelset and wheelset flange check pickup 5 secured on bracket 6 installed on axle box and protected from precipitation by hoods 8 and 9, recorder connected with pickups, supply unit to form pulses, splitter box and tube 3 with wires. End of bracket on which pickups are secured is divided into two parts, straight-line one and curved one. Boss in form of right-angled trapezium is made from side surface of bracket. Gusset is made to render rigidity to connection of right-angled trapezium with bracket, said gusset being arranged both on side and end face parts of right-angled trapezium.
EFFECT: increased safety, reduced accidents in operation of rail vehicle.
FIELD: railway transport.
SUBSTANCE: invention relates to methods and devices for technological control. According to proposed method of dimensional checking of train parts on the run, rails are used as guide members setting trajectory of movement of part under checking, and also data processing system, optical measuring system whose distance pickups consist of radiator and receiver designed for recording backscattered radiation. Measuring pickups are arranged in space at both sides relative to guide member on additional vibration-isolating base, measuring system is secured stationary, moment of train approaching is recorded and identification of car is carried out, measuring pickups are calibrated, measuring pickups are synchronized with guide member position pickups and moment of intersection of area of measurement by part is determined. Moment of intersection of area of measurement by part is determined in one and the same position of part relative to guide member. Then measured surface of part is scanned in direction of part movement, measurement is done along line of scanning in one direction, data are gathered and processed taking into account weight of car, corresponding deflection of rail and speed of train. When processing the data, angle of attack of wheel on rail and deformation of rail at moment of taking of measurement are taken into account additionally, the moment id recorded when part under measurement leaves area of measurement, and required parameters of part are determined. According to invention, complex of dimensional checking of train parts on the run includes train approach moment pickup, pickup recording moment when part under measurement leaves are of measurement, vibration-isolating base for fastening the pickups, pickup determining position of part relative to guide member and synchronizing device for time gating of readings of all pickups. Optical measuring pickups are arranged in space at different sides of guide member, are provided with calibration device and made for scanning all surface of part to be measured. Receiver of distance pickups is provided with at least one quick-acting position sensitive photodetector. Rail displacement pickup is made with possibility of checking deformation of rail.
EFFECT: increased accuracy of measurements.
3 cl, 1 dwg
SUBSTANCE: invention relates to the equipment for measuring railway rails and wheels. The method of determination of the clearance between the railway wheel ridge (2) and rail head (1) includes attaching a pickup with its sensitive element directed towards the point of contact between the wheel and rail head to a crosswise beam (3) of the car truck. Simultaneously with the start of the car, the data coming the pickup on displacement of the wheel ridge relative to the rail head at a preset distance is continuously recorded. Then the pickup is removed from the car, the data carrier is removed from the pickup and the data obtained is processed using a computer programme to provided for a digital visual picture. On the picture thus obtained, a video image of a ruler with divisions is imposed to define the abode said clearance in divisions of the ruler. The said device has a case with a core, a pickup and light sources arranged on both sides of the pickup at an equal distance from it.
EFFECT: simpler design and smaller sizes of the device.
3 cl, 4 dwg
SUBSTANCE: method of railroad wheel pair contact surface wear monitoring proceeds from the measurement of the rail vertical vibration acceleration effected using an accelerometer and comprises converting the said data into electrical signals to be compared to reference signals corresponding to permissible defect tolerances. The method includes, additionally, measuring the wheel rim vertical travel along the contact surface development length by means of consecutively arranged magneto electric pickups, establishing the dependence of the induced signal magnitude upon the wheel rim position and comparing the resulted ratio with the defectless wheel reference data. The results obtained are correlated to the wheel pair linear speed to disclose, finally, the wheel defect size.
EFFECT: accurate measurement in wide range of train speeds.