SU751672A1 - Apparatus for dynamic testing of electric railway rolling stock current collectors - Google Patents

Description

one

The invention relates to the field of testing technology and relates to devices for the dynamic testing of current collectors of current-time rolling stock.

A device is known for dynamically testing current collectors of electroiodine of a composition comprising a platform carrying the current collector supported through elastic elements, for example cylindrical springs, on a peep JQ base, and rotated with a predetermined frequency frame, on the outer surface of which contact elements are located interacting with the runner of the current collector under study, and the wind load imitation block i.

A disadvantage of the known device is relatively narrow functionality.

The purpose of the invention is to extend the functionality of the device.

This goal is achieved in that said frame is made in the form of a prism, for example a rectangular one, the longitudinal axis of which forms an angle different from 90 with the longitudinal axis of the current collector 95.

In addition, in order to create vibration loads that are close to real, the device is equipped with 30

each other in three mutually perpendicular directions by electromagnetic exciters, and in order to simulate the size and size of the wind load, the wind load simulation block is mounted on a carriage rotated around the base of the device.

FIG. 1 shows schematically a general view of a device; in fig. 2 is a scheme for changing the height of the current collector skid during the test; in fig. 3 is an imitation scheme for driving a train.

Claims (3)

Test tokenamepik 1 is installed on platform 2, which is connected to base 4 via the arms 3. Cor 5 are mounted to the platform 2 from the sides, mounted so that their axes are perpendicular to each other. On the uprights 6 of the base 4 are installed against Korea 5 electromagnetism exciters 7 so that their perpendicular axes to each other and each electromagnet are coaxial with their core. The skid 8 of the tokuriiampika co-operates with the contacting elements 9, rigidly fixed by means of racks 10 made of electrical insulating material, for example, a textolite, to the shaft 11, installed in the terminal 12. For example, the shaft is rotated in a direction, an adjustable electric motor 13, for example DMK-1/50. The shaft 11 with the contact elements 9 is set at an angle to the skid 8. The aerodynamic forces (imitation of the wind load) are excited by the fan 14 with an adjustable speed v1, or by the rotary turret 15 mounted on the carriage 16. The carriage together with the fan is shifted by the electric drive 17 on the ring and guide 18 around the current pickup. The voltage is applied to the contact elements by means of a current collector 19, for example a mercury one, mounted on the shaft 11 and connected by wires 20 to the contact elements 9. The device operates as follows. During the rotation of the shaft 11 (Fig. 2) koitaktnye. the elements 9, which are the edges of the spatial figure, the prisms, alternately slide along the runner 8, thereby causing it to change its altitude position: raise or lower. Calculations show that if the prism section is a square, the vertices of which (co-tact elements) are remote from the prism axis (from the shaft), for example, 0.5 m, then the displacements of the skid are 0.15 m. In order to form a rectangle with sides in the cross section, for example, 0.5 and 1.0 m, the movement of frost will reach 0.85 m, which corresponds to the maximum possible during operation. The distance of the contact elements from the shaft is determined from the calculations in the course of co-operation, based on the length of the frost. By installing the actuator (Fig. 3) at an angle to the smallpox of a skid 8 n by rotating the shaft (the actuator) with defined turns, the problem of simulating the speed of a train moving is solved. Vector At the circumferential speed of the actuator, applied at the point of contact of element 9 with frost 8 tangentially to the rotation circle, expands the pa component Vz acting along the axis of the skid (in operation occurs due to misalignment of the contact suspension in the axis of the track) and a component 1 of the ultrasound, perpendicular to the axis of the skid, arising from the movement of the locomotive and dependent on its speed. Calculations show that if the angle a between the contact elements (the actuator) and the skid is set to, for example, 60 °, then to simulate a train speed of 120 km / h, it will be necessary to rotate the shaft at a speed of 1280 rpm, which is practically easy to implement. By reducing the angle of rotation, the rotation speed can be significantly (several times) reduced. During the tests, the movement (its imitation) is regulated by the electric motor 13 in the range from 0 to the maximum constructive speed. The magnitude of the wind load is simulated by the speed of rotation of the fan (its nanor), the wind direction is achieved by not moving the carriage 16 with the fan 14 installed at the right angle along the ring axis 18 around the device. The current collector under study is equipped with sensors, recording current collection processes, mechanical gears in main accelerations in the main structural elements and contact pressure depending on the speed of movement, the current collector’s altitude position, aerodynamic forces and vibrations. Claim 1. Device for dynamic testing of pantographs of an electric rolling stock, including a platform to be tested, a current collector, supported through elastic elements on a fixed base, n rotated at a predetermined frequency of the frame, on the outer surface of which the contact elements interacting with a skid of the current collector under study, and a wind load imitation unit, characterized in that, in order: 1, to solve the device’s fundamental capabilities, said frame is made a prnzmy, irodolna whose axis forms with the longitudinal axis of the susceptor skid angle, differing from 90 °. 2. The device on and. 1, so that, in order to create vibration loads close to real, it is equipped with electromotive exciters that are mounted on the basis of electrophoresis, coordinated with each other in three mutually perpendicular directions. 3. The device according to PP. 1 and 2, characterized in that, in order to simulate a variable in magnitude and direction of the wind load, the wind load imitation unit is mounted on a carriage rotated around the base of the device. Sources of information taken for examination at examination 1. USSR author's certificate 469625, cl. B 60L 5/00, 08.23.72. 0Y