SU1216708A1 - Arrangement for material abrasive wear testing - Google Patents

Abstract

The invention relates to the use of materials for abrasive wear and can be used to reproduce, under test conditions, the operation of parts impacting with an elastic mass containing abrasive particles. The purpose of the invention is to enable the simulation of non-stationary loading conditions during testing. Use a flat sample in a holder. The extreme upper position of the holder, which determines the path of the roller friction and the time of its contact with the sample, is established by the damper with a screw. The load on the sample is set by compressing the spring with a screw. The disk is rotated along with the rollers, successively interacting with the sample through a layer of abrasive particles entering the contact zone in the form of a jet flowing out of the dispenser. In this case, the gears roll around the crown, the rollers are driven into rotation, as a result of which, besides the rotation around the disk axis, they also rotate around their own axes. The arrangement of the rollers at different distances from each other and the execution of their lining of elastic material of different thickness allow for the implementation of variable loading conditions due to a change in both the loading frequency (the collisions of the rollers and the specimens) and the force impulse upon impact determined by the thickness of the elastic material. material and the magnitude of its deformation. 1 hp ff, 2 ill. i (L o o o OS

Description

i

The invention relates to material testing for abrasive wear and can be used to reproduce when testing the operating conditions of parts impacting with an elastic mass containing abrasive particles (for example, threshing drum billers, scrap cleaning machines, feed choppers knives and other agricultural machinery parts shock interacting with the plant mass).

The aim of the invention is to enable the simulation of non-stationary loading conditions during testing.

FIG. 1 shows the scheme predla. f aeHoro device; in fig. 2 is a cross-section of AOB in FIG. one,

The device for testing abrasive wear materials comprises a base 1, a holder 2 for a flat sample 3, made in the form of a single-arm lever mounted on the base with the help of a hinge 4, a disk 5, abrasive elements made in the form of rollers 6, the loading mechanism 7, executed in the form of a spring with a re-lug 8 force and node 9 dosed supply of abrasive. The sample is clamped in the holder 2 by the screw 10, and the loading mechanism 7 is fixed to the base 1 by the bracket 11. The movement of the holder 2 is limited by the damper 12, its position is adjusted by the screw 13. The damper 12 is fixed to the base 1 by the bracket 14.

The rollers 6, which play the role of abrasive elements, are lined with elastic material 15 and are installed with the possibility of forced rotation on the bearing supports. In addition, the rollers 6 are provided with gears 16 meshed with a gear Vendan 17 fixed on the base 1, and mounted around the circumference of the disk 5 at different distances from each other.

The device works as follows.

The test flat sample 3 is installed in the holder 2. The uppermost position of the holder 2, defining the way of training roller 6 and the time of its contact with sample 3, is set by the damper for 12 s

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using the screw 13. The load on the sample is set by compressing the spring 7 with the screw 8. The disk 5 is rotated together with the rollers 6,

5 consistently interacting with sample 3 through an interlayer of abrasive particles, getting 1x into the contact zone in the form of a 9 jet flowing out of the dispenser. With this gear 16,

10 rolling around the rim 17 causes the rollers 6 to rotate, as a result of which, besides the rotation about the axis of the disk 5, they also rotate around their own axes. Location of the rollers

15 6 at different distances from each other (with variable angular pitch) and performing their lining of plastic material of different thicknesses 1 allow for variable loading conditions due to the change in

both the frequency of loading (the impact of the rollers 6 with the samples 3) and the force impulse upon impact, determined by the thickness of the elastic material and its large deformation.

Claims (2)

1. A device for testing abrasive wear materials, comprising a base, a disk, abrasive elements placed on the periphery of the disk with a lining of elastic material, a disk rotating drive, a holder for 25 for placing a flat sample, made in the form of a lever pivotally mounted on the base, a loading unit connected to the lever, and a unit for dispensing abrasive to the sample, characterized in that, in order to enable the simulation of non-stationary loading conditions during testing, the loading unit is made in the form of a spring, the abrasive elements are installed at different distances from each other, and the lining of elastic abrasive elements of elastic material is made unequal in thickness. 2. The device according to claim 1, characterized in that the abrasive elements are made in the form of rollers and are installed with the possibility of forced rotation around their axes. 1 15 3 2 Ljd FIG. 2