SU1686341A1 - Materials wear tester within the abrasive particles flow - Google Patents

Abstract

The invention relates to the study of the physicomechanical properties of materials, in particular the abrasive wear of materials in dusty streams, and can be used in the design of air ducts and gas cleaning systems. The purpose of the invention is to expand the range of test parameters by varying the angle of attack, as well as improving accuracy. The device includes an abrasive flow controller 4, a centrifugal fan 7, a sample holder 9 of the sample 10 mounted for rotation, a light emission modulator 20, an amplitude meter 23, a frequency meter 24, light guides 16 for supplying light radiation and detecting light reflected from the sample surface 10. When the device is operated, turning the holder 9 leads to a change in the conditions for the supply of light and the registration of radiation. Correction block 26 allows to take into account these changes with the help of a special system. 2 з p. F-ly, 1 ill. CO s oo o SA) 4

Description

The invention relates to the study of the physicomechanical properties of materials, in particular the abrasive wear of materials and dusty streams, and can be used in the design of air ducts and gas cleaning systems.

The purpose of the invention is to expand the range of test parameters by varying the angle of attack, as well as increasing accuracy.

The drawing shows the proposed device.

The device has a housing 1, a metering hopper 2 mounted on the housing 1 or, if necessary, connected with a vibrator 3 mounted on the housing 1, an abrasive flow controller 1 in the form of a flap located on the axis of the funnel 5 communicating with the channel 6 formed in the housing 1. To accelerate particles through the channel, a centrifugal fan 7 is used, placed in the cavity of housing 1 and connected with electric drive 8, which causes it to rotate. In the cavity of the holder 9 is installed sample 10 of the material. The holder 9 has a cylindrical surface, and its axis is perpendicular to channel 6, and can be rotated with sample 10 around the axis of the axis and fixed with the help of stopper 11 at a selected angle of attack relative to housing 1. The outlet (not shown) is connected to the dust collector 12 (with the damper 13 closed) or, via pipeline 14, with the fan 7 (with the damper 13 open). Channel 6 contains a protective cover 15 associated with a mechanism for moving the light guides 16, which are intended to supply light from the source 17 and to tap through the receiver. The mechanism, for example, from stem 10, is mounted- HOIO with the ability to move across the section of channel 6 in guides 19 located in housing 1. The device also contains a light modulator 20 in the form of a disk with holes, the axis of which is kinematically connected is connected to the axis of the fan 7, the receiver 21 connected to the light emitting radiation, the drive 22. Reciprocating the rod 18 reciprocally, the unit for estimating the intensity of light emitted in the amplitude meter 23 and the frequency meter 24. the block 25 fixing the sample and the block 26 correcting the intensity of reflected light from the sample radiation.

The device works as follows. The abrasive particles from the metering hopper 2 are fed into the funnel 5, from which they enter the cavity of the fan, are accelerated by air flow and are directed through channel 6, hit the surface of sample 10, and then through the outlet nozzle 12 valve 13) or again sucked in by a centrifugal fan through pipe 14 (with open valve 13).

By rotating the sample 10, the distance to the optical fibers 16 changes; the received signal is transmitted to correction unit 26, where this signal is processed and, corrected, enters amplitude meter 23 and frequency meter 24. Block 26 allows to correct the error of change

the magnitude of the light signal from the distance from the optical fibers 16 to the surface of the sample 10, recorded by the amplitude meter 23 and the frequency meter 24. This achieves the reliability of the results.

The proposed device allows to carry out research on abrasive wear, depending on the speed of the abrasive jet, the angle of attack of the sample, the concentration of abrasive particles and the time of exposure of the sample.

Claims (3)

Invention Formula 1, A device for testing the wear of materials in the abrasive flow. particles, having a chamber made in the housing, a sample holder of the material installed in the chamber, a channel for feeding a stream of abrasive particles through the chamber to a sample located in the outlet housing, a wear recorder including a light source and a light receiver located in the channel opposite the sample holder with the possibility of j movement in the radial section of the channel, the unit for estimating the intensity of light radiation reflected from the sample, and abrasive feed into the channel, characterized in that, in order to expand range of test parameters by varying the angle of attack, it is equipped with a unit for adjusting the intensity of light reflected from a sample, connected to a unit for estimating the intensity of light radiation, and the sample holder is set with the possibility of changing the angle of attack of the flow with respect to the sample. 2. Device pop. 1. that is, so that, in order to increase accuracy, It is equipped with two optical fibers, which are designed respectively to supply the light flux to the sample and to divert the light flux reflected from the sample to the light intensity assessment unit. 5168634; b 3. The device according to claim 1, of which there is an outlet nipple, and the channel, the chamber and the fact that it is equipped with a injection nozzle form a closed reservoir connected to the tour.