SU1307300A1 - Disk friction machine - Google Patents

Abstract

This invention relates to the field of materials friction and wear testing. The aim of the invention is to increase the reliability of the tests by bringing the test conditions to real for friction pairs with intermittent contact, which is ensured by the fact that sample 3 and two counter samples 9 and 10 are located in the same plane. Each of the counter-sample holders 7 and 8 is driven into counter-rotation by the drives 11 and 12, which are placed with the help of the supports 13 and 14 on the frames 15 and 16 mounted on the base 1 with the possibility of movement by the movement mechanisms 17. The holder 2 of sample 3 is kinematically connected to a swinging motion drive 4, and the load is carried out by a cyclic load assembly made in the form of a profile cam 20, a rotation drive 21, a single shoulder ча latch 22, one end of which is fixed to the base, and the other interacts with the cam 20 by means of a roller 26 and a spring-loaded stem 23 connecting the single-arm lever 22 to the holder 2 of sample 3. 1 sludge. § (L 4 s 0 O: / d

Description

This invention relates to materials testing for friction and wear.

The aim of the invention is to increase the reliability of the test by bringing the test conditions to real for friction pairs with intermittent contact.

The drawing shows a diagram of the machine friction.

The friction machine disc contains a base 1, a holder 2 of sample 3 mounted on it, an actuator 4 connected through a reduction gear 5 and a rocker mechanism 6 with a holder 2, two holders 7 and 8, respectively, counterblocks 9 and 10, placed in the same plane with the sample 1-2mm gap between each other. Holders 7 and 8 are connected by drives 11 and 12 of their rotation. The actuators 11 and 12 are placed with the help of the supports 13 and 14 on the frames 15, 16, which, in the case of a failure, are mounted on the base 1 with the possibility of movement by means of the movement mechanism 17. On the case of each of the actuators, the movable parts 18 of the friction torque sensor, made in the form of a fork, are fixed, and on the frame - the fixed parts 19 (shown in one of

drives 11), made in the form of a ten-wheeling.

The cyclic loading unit is made in the form of a profile cam 20, its rotational drive 21, single-arm

lever 22, one end of which is locked at 35 m, equal to the stop in the work of natures

on the base, and the other interacts with the cam 20, and the spring-loaded rod 23 connecting the holder 2 with the single-arm lever 22. Tachogenerators 24 and 25 respectively are used to determine the frequency of rotation of the shafts of the drives 4 and 21. The single-arm lever 22 interacts with the profile cam 20 s. using roller 26.

The machine works as follows

When the drive 4 of the rocker mechanism 6 is turned on, the holder 2 with the sample 3 is set to rotate. Turning on the drives 11 and 12 in series, the counterbends 9 and 10 set the counter rotational motion. At the same time, the instantaneous values of the linear speeds of the counter samples are set equal respectively to the average values of m speeds of the forward and reverse stroke of the part of the full-scale friction unit. Since the full-scale y3jn) i friction work in the mode of short stops

ten

15

20

25

thirty

after each double move of the movable component, then to simulate such a periodicity of friction, sample 2 is inserted and removed from contact with counter samples with a given discreteness using a cyclic loading unit. For this, the engine 21 is turned on and a certain rotational speed is established kinematically connected to the profile cam 20. When the roller 26 rolling around the surface of the profile cam 20 hits the single-arm lever 11 under the action of load P, it compresses the spring and moves the rod 23 with the sample holder 2 , input sample 3 in interaction with contra-bombs 9 and 10. The bodies of the drives 11 and 12 react to the resulting friction forces in the model friction unit by turning and influencing forks on the elastic parts 19 of the friction torque sensor. The electrical signals generated in this case in amplifiers are amplified and recorded using a loop oscilloscope (not shown). The width of the slits in the profile cam 20 is made from such a calculation that sample 3 has managed to complete one complete swinging motion, after which roller 26 emerges from the slot and under the action of a decompression spring, the rod 23 removes sample 3 from conjugation with the counter-specimens 9 and 10 until the next interaction at time0

five

0 5

friction knot. The number of cuts in the profile disk 10 is regulated by setting or clearing special inserts, which determines the different cyclical nature of the training.

Claims (1)

Invention Formula A friction disk disc containing a base mounted on it a sample holder, a reversing motion drive, kinematically associated with a sample holder, a counterpiece sample, a rotational drive of the counterpiece sample holder, a loading unit and a friction torque sensor, which is designed to increase the reliability of the test by bringing the test conditions to real for friction couples with intermittent contact, it is equipped with an additional counterpiece holder, an nptffloid of rotation of this holder, frames 313073004 with rolling bearings to accommodate the second interacts with the cam, and Both of these rotational drives, a mechanism rod connecting the sample holder we move the frame relative to the OS with a single-arm lever, and the second dating, a cyclic loading unit of the moment of friction, moving parts In the form of a profile of both sensors of the moment of the tray and the bandwidth, the drive of its rotation, it is single-sided on the respective drives of the wrist lever, one end of which is counter-specimen holders, and non-swivel on the base, on the base frames.