SU386317A1 - INSTALLATION FOR RESEARCH ON SHOCK WEAR - Google Patents

Description

one

The invention relates to the field of testing equipment.

According to the main author. St. No. 167660, there is a known apparatus for testing the impact wear of materials with an abrasive jet, which contains a bunker, a vacuum chamber in communication with it, designed to place the sample holder with a sample, drive the sample holder rotation, and a viscous trap located inside the chamber and inhibit movement. abrasive particles.

However, the continuous supply of an abrasive jet falling on a rotating sample causes the edges of the sample to wear out, which reduces the accuracy of investigating the abrasive erosion of materials.

The proposed installation differs from that known in that the camera is equipped with a partition dividing it into upper and lower parts, and an abrasive jet cutter installed in the upper part of the chamber and rotating synchronously with the holder, which is located in the lower part of the chamber.

Such an installation allows to increase the accuracy of the study.

FIG. 1 schematically shows the proposed installation, the abundance of the form; on fig. 2 is a section along A-A in FIG. one.

The installation contains a closed bunker / for abrasive with a feeder 2, connected to the vacuum chamber 3 through the cover 4, a trap 5 filled with a viscous mass and connected to the vacuum chamber 3, a device for rotating the test sample, made in the form of a shoulder 6 with the sample holder 7. Vacuum chamber 3 and catcher 5 are divided in height by partition 8 into two parts, in the lower part of

which has a shoulder 6 with a sample processor 7, and in the upper part of the chamber 3 is installed with a synchronous rotation with the sample holder 7, a cutter 9, made, for example, in the form of a rod. Installation

has a drive 10.

The proposed installation works as follows. With a vacuum pump (not shown in the drawing), air is removed from the vacuum chamber 3. The actuator 10 reports the rotation of the sample attached to the shoulder 6. When the drive reaches a constant speed, the feeder 2 is fed from the hopper 1 with an abrasive stream into the vacuum chamber 3. Rotating synchronously with the shoulder 6, the cutter 9 with each turn beats a part of the abrasive to the side and it remains in the upper parts of the vacuum chamber 3 and the catcher 5. Leaving a part of the jet

abrasive continues to move with acceleration

free fall and, passing through a hole in the partition 8, hit the sample.

The vertical distance from the splitter 9 to the sample holder 7 is selected depending on the rotation speed of the sample holder and the height I fall of the stream so that the cutter I pass through the falling stream of abrasive, beats away the part of the abrasive that would later fall on the edge of the sample .

Due to the synchronism of the rotation of the shoulder 6 and the trimmer 9, the abrasive impinges on the sample in the middle part of the latter, without wearing it.

Abrasive particles and their fragments fall into the trap 5, filled with a viscous mass. Particles, Prgroni. As a viscous mass, are inhibited by the vehicle, thereby preventing the possibility of secondary impacts between the particles and the sample.

After emptying the hopper on / off

the actuator 10, remove the cover 4 and detach the sample. Weighting determines wear.

By knowing the total amount of abrasive and weighing the remaining in the upper or lower part of the vacuum chamber and the abrasive catcher, you can determine the actual amount of abrasive that is struck to the surface of the specimen.

Subject invention

Installation for the study of shock material wear abrasive jet auth. St. No. 167660, characterized in that, in order to increase the research accuracy, the camera is equipped with a partition dividing it into the upper and lower parts, and an abrasive jet cutter installed in the upper part of the chamber and rotated synchronously with the sample holder, which is located in the lower part cameras.

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