SU705301A1 - Apparatus for studying abrasive wear of specimens - Google Patents

Description

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The invention relates to testing equipment, in particular to wis installations (the study of abrasive wear of materials in a jet of free abrasive.

A device for exploratory materials in a free abrasive jet is known, comprising a hopper, a metering slide, an abrasive channel ending in a nozzle, a source of compressed air connected to the abrasive channel, sample holders tl.

However, when the particles of an abrasive are accelerated by a gas stream, small particles acquire greater speed than 1-finned ones, which makes it difficult for the accuracy of estimating the amount of wear and the reproducibility of the experimental results.

A device for the study of abrasive wear of samples, a base containing a hopper, an abrasive placement hopper, an abrasive distributor, made in the form of a cylindrical bowl, evenly divided around the circumference are known.

plates-guides and fitted with radial channels, the drive of rotation of the abrasive distributor, sample holders 21.

However, the known device does not allow creating a uniform impact of abrasive particles (on concentration and speed) with a large sample size, since large particles acquire a greater speed during centrifugal acceleration of particles. What are small.

The aim of the invention is to approximate the test conditions to real ones by creating an equal velocity of the impact of the abrasive particles with the sample and a uniform distribution of the particles over the cross section. .

Claims (2)

This is achieved by providing the device with a supply of ejecting nozzles covering the channels, the sample holders are mounted on the base. Radial channels are located, for example, on a screw surface. The drawing shows a device for studying abrasive wear of samples, a general view. The device contains a hopper 1 for placing abrasive, dispensing a slant 2 located in the lower part of the bunker, an abrasive distributor made in the form of a cylindrical bowl 3 plates - guides 4, central body 5, radial channels 6, connected with a cylindrical thicket 3 ejecting nozzles 7 connected to channels 6 by means of cylindrical liners. The abrasive distributor is connected to the rotational drive 8, which allows adjusting the rotational speed of the abrasive distributor. Samples 9 are placed in the sample holders 10, which are mounted on the base 11, evenly around the circumference. Radial channels are evenly distributed along a cylindrical, more often 3, for example, along a helical surface. The device catcher 12 abrasive charkigits compilation 13. The device works as follows. After switching on the drive 8 and reaching the required speed of the abrasive distributor, the Dosing flap 2 is set to the required abrasive consumption. The abrasive under the action of the force of the tin falls on the central body 5 of the abrasive distributor, dissected by plates - with the direction 4 into equal parts, under. the action of centrifugal forces enters the channels 6, where de is accelerated. At the exit from channel 6, the abrasive falls into the ejecting nozzle 7, in which the velocity is equalized; particles due to air flow. Abrasive from nozzles 7 is fed to samples 9 secured in the sample holder 10. The spent abrasive from the catcher 12 is sent to the abrasive collector 13. The presence of ejecting nozzles, their uniform distribution over the height and circumference of the abrasive distributor allows to equalize the speed of small and large particles of abrasive and test samples with sizes that provide subsequent mechanical tests to study the effect of the contribution on the static and long-term material strength, as well as to accurately assess the phenomenon of aero abrasive wear of materials and to achieve satisfactory isocompatibility of experimental results. . . 1 Claim 1. A device for researching abrasive wear of samples containing a base, an abrasive placement hopper, an abrasive distributor made in the form of a cylindrical bowl, evenly divided around the circumference of the formation by means of guides and equipped with p & diane channels sample holders, characterized in that in order to bring the test conditions closer to the real ones, it is equipped with ejecting nozzles covering the channels, and the sample holders are mounted on the and. 2. The device according to claim 1, characterized in that the radial channels are located along the helical surface ... Sources of information taken into account during the examination 1. P.Averchenko. Installation for research on wear in the stream of free abrasive. , 1969, No. 10. 2. USSR author's certificate number 333470, cl. G 01 N 33/40, 1969 (prototype).