RU1783370C - Device for friction testing of materials - Google Patents

Abstract

The invention relates to a friction test technique. The purpose of the invention is to expand the functionality by providing tests not only with a smooth decrease, but also with a stepwise decrease or increase in the energy of mutual rotation of the sample and the counter-sample. It contains grabs 2.3 for sample 4 and counter-sample 5, weights 9-12, drive 14 with wheel 17 and guide 15. After pressing sample 4.5 one against the other with screw 6, weights 9-12 are alternately accelerated in a given direction and at a predetermined speed and by means of couplings 13 are alternately connected to the shaft 8, ensuring mutual rotation of the samples. Use when testing samples of different materials and products. 1 ill. 6 2 (L C h with W XI о

Description

The invention relates to testing equipment, to testing samples of materials and products for friction.

A known apparatus for testing friction materials, comprising a base, grips of a sample and a counter sample mounted thereon, a spring-screw loading mechanism. a mechanism for reciprocal rotation of the grippers, including a shaft, onto which the counter-sample gripper is rigidly fixed, inertial loads kinematically connected to the shaft, and a drive for rotating the loads. :,; g :::.:. - .-. -., -.... ..

The disadvantage of the installation is that it is not feasible to test with a stepwise decrease or increase in the energy of the mutual rotation of the sample and the counter-sample .-

The purpose of the invention is to expand the functionality by providing tests not only with a smooth decrease, but also with a stepwise decrease or increase the energy of the mutual rotation of the sample and the counter-sample. ;;

The goal is achieved by the fact that the installation is equipped with a guide mounted parallel to the shaft axis, a carriage located on the guide with the ability to move along it and fix it, and a friction wheel, which is installed on the rotation drive and is designed for alternating interaction with loads, the rotation drive is placed on the carriage, the loads are sequentially mounted on the shaft, and the kinematic connection of the loads with the shaft is made in the form of couplings according to the number of loads;

The drawing shows the installation diagram; : .. ..; -. ; ..; .:

The installation for testing friction materials contains a base 1. Mounted on it: Grips 2.3 of sample A and counter-sample 5, spring-screw loading mechanism 6.7, a mechanism for reciprocal rotation of the grippers, including a shaft 8, on which the grip is fixed 3 counter-samples, inertial loads 9, 10, 11, 12 kinematically connected to the shaft by means of elements 13, and a rotation drive 14

cargo .-.

The installation is equipped with a guide 15, arranged parallel to the axis of the shaft 8, a carriage 16 mounted on the guide with the possibility of movement along it and fixing, and a friction wheel 17 located on the rotation drive and designed to alternately interact with the loads. A rotation drive 14 is mounted on the carriage 16. The weights 9-12 are sequentially placed on the shaft. The kinematic connection of the loads with the shaft is made in the form of couplings 13 according to the number of loads.

The guide has the form of a screw 15, along which the carriage moves,

. the platform 17 serves to accommodate the drive, and the screw 19 serves to displace the platform 18. On the base there are bushings 20 with electromagnetic couplings 21, with which weights 9-12 interact.

The installation works as follows. v; -V:; -: -; -v g: - ::::. ::. - v -..-. . The rotation of the screw b deforms the spring 7 and create a given mutual compression of the sample 4 and counter-sample 5. Turn on

waters 14 and. through the wheel 17, the inertial load 9 is rotated to a speed at which a predetermined amount of energy is stored on it. By rotating the screw 15, the platform 18 with the drive 14 is displaced and the latter is brought out of interaction with the load 9. The clutch 2.1 is turned off. and include a clutch 13 serving the load 97, as a result of which the load 9 is connected to the shaft 8 and rotates it together with the grip 3 and the counter-cutter 5. The grip 2 and the sample 4 are not rotatable, therefore, the mutual rotation of the sample and the counter-pattern . Turn screw 15 to move

carriage 16 with drive 14 up to the level of interaction, wheels 17 s. with load 10, put wheel 17 into contact with load 10: using

the screws 19, turn on the actuator 14 and open

load 10 in a given direction of rotation

and to a given rotation speed. Screw

19, the wheel 17 is brought out of interaction with the load 10 and, at a given moment, the couplings 21 and 13 switch the load 10. The load 10 is connected to the shaft 8, as a result of which the rotational energy of the shaft 8 is varied stepwise. 11 and 12 in accordance with the test program and tests are carried out

with a step change in the level of energy input for mutual rotation of the sample and the counter-sample with friction between

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Claims (1)

The installation allows testing in a new mode, both with a smooth and stepwise decrease or increase in the energy of the mutual rotation of the sample and the counter-sample during friction tests. SUMMARY OF THE INVENTION An apparatus for testing materials for friction, comprising a base, grips of a sample and a counter sample mounted thereon, a spring-screw loading mechanism, a reciprocal rotation mechanism of grippers, including a shaft on which the gripper of the counter sample is fixed, inertial loads, kinematically related a shaft, and a drive for rotating goods, with a l-guide with the possibility of moving so that, in order to expand neither on it, nor fixation, and friction co-functional capabilities by means of a scaffold mounted on a wire liver tests not only with smooth rotation and intended to reduce, but also with a stepwise reduction 5 occasional interaction with loads, drive or an increase in the energy of mutual rotation-rotation is mounted on the carriage, the pony loads of the sample and the counter-sample, it is supplied subsequently mounted on the shaft, and the kinetic guide installed parallel-magic connection of the goods with the shaft is made but the shaft axis, the carriage mounted in the form of couplings according to the number of loads.