SU455297A1 - Device for measuring the electrical contact resistance of two bodies - Google Patents

Description

one

The invention relates to the technique of electrical measurements and can be used in the study of "contact resistance and electrical noise of sliding electrical" onts, as well as in the study of the area of contact in the preliminary displacement mode, and in the event of a splitting operation.

A device for investigating the electrical resistance of two bodies, consisting of crossed rods, a weighing device, a power source and a voltmeter connected to the opposite-sided sides of the rods, is known. The electrical contact resistance is found as a quotient from dividing the measured voltage by the amperage.

The measured value of the voltage drop only includes the voltage drop on the contact resistance and does not include the voltage drop — the voltage of the elements of the bodies under study and the conductive elements.

The capabilities of this device are limited by the fact that it allows the measurement of contact resistance with stationary bodies and the impact on the contact area of only a normal load.

However, in a number of cases, it is necessary to continuously investigate the change in the electrical contact resistance during the growth of the tangential force acting on the contact area of two bodies, as well as in pro2

The process of mutual and tel. Investigation of the change in contact of the 1st Co-ordinate in connection with the tangible strings allows us to obtain information on the processes occurring at the two-body contact and in the mode of alternating shifts), enn.

The purpose of the invention is a continuous study of the change in electrical contact sonotism in the process: the growth of that force, whose strength is related to the contact of two bodies under study. and also with their mutual non-time1, e31II.

This is achieved by the fact that one of the bodies under investigation, made in the form of a cut

- rings, fastened by means of a concentric sleeve of insulating material on a pole mounted in bearings, and at the other end of which is mounted a pin with a vessel attached to it using a flexible thread, which is evenly loaded during the process of reading.

In the drawing, the device is punished in the working position. Body / Cylindrical Shaped

through the insulating gasket on the lever 2 weight mechanism. At the other end of the lever is installed. Body-. representing the cut ring, with the help of the sleeve 5 of insulating material, mounted on the axis 6. laid out in bearings. At the other end

the axis is fixed to the pulley 7 with the vessel S. The ends of the bodies are connected electrically by means of flexible conductors to a source of 9 constant stabilizing current with a recorder 10.

The device works as follows.

Under the influence of the load, 3 bodies / 4 are pressed to a friend with a given load. In this case, the moment of forces acting on axis 6 is equal to zero. With the help of an assembly with a sufficiently large volume, the vessel 8 is started to be filled with a uniform stream of water, at the same time the memory oribor is switched on, recording the current drop in contact temperature and contact resistance. When the tangential of 1a, the force created by the loading of the vessel with water, reaches the magnitude of the force of friction, there is a displacement of the bodies 1 .n 4 relative to each other. The rotation of the body 4 at the axis 6 may either be stopped by stopping the loading or continue. In the latter case, the device 10 underestimates the voltage measurement in the slip mode.

By processing the captured diagrams, the dependence of the area growth on the tangential

forces in the mode of preliminary displacement, as well as oscillations in the mode of slip-on.

P re d mEt and c o rd of eN and

A device for measuring electrical contact resistance, containing two bodies under study, a weighing device, on the lever of which one of the above mentioned elements is fixed

bodies, a power source and a measuring device, connected to the opposite ends of the bodies under study, characterized by the fact that, in order to continuously investigate the change of electrical contact resistance in

the growth of tangential force applied to the Contact of two bodies under study, as well as their mutual movement, one of the bodies under investigation, made in the form of a cut ring, is fixed by means of an concentric sleeve made of insulating material on the axis installed at the ends, at the other end of which a pulley with a vessel fixed on it, equally: loadable in the measurement process.

5 Yu