SU1021994A1 - Device for testing bearing materials for hydroabrasive wear - Google Patents

Description

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The invention relates to testing devices and can be advantageously used in testing and studying materials for pump bearings, hydraulic turbines, dredging pumps and other machines, moving liquid containing abrasive content. the form of sand, grave and other mechanical impurities.

A device for testing bearing materials for hydro-abrasive wear is known, comprising a frame attached to it, an airtight cylindrical chamber mounted therein. on the pipeline for supplying mechanical impurities with a dosing unit, a sample loading unit and a rotational drive for moving samples tlU. However, the known device gives Remaining reliable results of testing materials of bearings for hydroabrasive wear, which is due to the lack of circulation of the hydroabrasive medium in the contact of samples of materials and the absence of concentration of abrasive in the working medium.

The aim of the invention is to increase the reliability of the results of testing materials of radial and thrust bearings under the conditions of circulation of the hydroabrasive medium through them,

This goal is achieved by having a device for testing bearing materials for hydroabrasive wear, comprising a frame, a sealed cylindrical chamber mounted on it, rotatably mounted and perpendicular to the frame, a moving sample holder, a stationary sample holder placed on s; Supply pipeline: mechanical impurities bunker with metering unit; sample loading unit; and rotation drive of movable sample holder; it is equipped with a centrifugal wheel mounted on the movable sample holder and between working and evacuating pipelines, and. a guiding device mounted in a chamber enclosing a centrifugal wheel and intended to direct the working medium into contact of the samples. .

The drawing shows a device for testing materials of bearings for hydroabrasive wear.

It contains the frame 1, the chamber 2, the holder 3 moving samples 4 and

5, holders 6 and 7 of fixed samples 8 and 9, pipeline 10 for supplying the working medium to the chamber 2, Pipeline 11 for withdrawing it from chamber 2, the hopper 12 with the dosing unit 13, unit 14

loading samples, drive 15 of rotation of holder 3, centrifugal wheel 16 with guide vanes 17. Drive 15 is mounted on intermediate support 18. Kainer 2 is equipped with a cavity 19 for heat carrier and means 20 and 21 for supplying and withdrawing it from cavity 19.

The device works as follows.

After filling the system with a working medium, which, depending on the test conditions, can be either water or a corrosive environment, the actuator 15 is started, which causes the holder 3 to rotate with test samples 4 and 5 and the centrifugal ring 16 which creates circulation of the working medium in the circuit. The guiding apparatus 17 serves to supply the working medium directly to the contact of samples 4.8 and 5.9. The abrasive is poured into a bunker 12, built-in in B of the pipeline 10, from where it is fed into the system with the help of a metering unit 13 providing a predetermined concentration. The circulation of the working medium can be carried out both in a closed circuit, when the pipelines 10 and .. 11 are interconnected, and in open circuits. In the case of operation of the stand with an open circuit, the working medium with an abrasive, after passing the test samples, through the pipe 11 is discharged into the drainage, and a new one is continuously fed into the system. This ensures the constancy of the concentration of the abrasive in the liquid, the constancy of the shape and size of the abrasive particles, and allows continuous testing for as long as desired. as close as possible, conditions of carrying out -; torture. to real.

55 The positive effect is due to the increased reliability of the results of testing materials for radial and thrust bearings.

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Claims (1)

(.541 (57) DEVICE FOR TESTING MATERIALS OF SURFACES ON HYDROABRASIVE WEAR, containing a bed, a sealed cylindrical chamber mounted on it, mounted therein with the possibility of rotation and perpendicular to the bed, a holder of movable obes, raez, a holder of stationary samples for running * and removal of the working medium, a hopper of mechanical impurities with a dosing unit, a unit for loading samples and a drive for rotating the holder of movable samples placed on the pipeline for supplying fluid; this is important because, in order to increase to ensure the reliability of the test results of materials of radial and thrust bearings under conditions of circulation of the hydroabrasive medium through them, it is equipped with a centrifugal wheel mounted on the holder of movable samples and between the pipelines for supplying and discharging the working medium, and a guiding device, such as § enclosed in a chamber _f enclosing a centrifugal wheel and designed to direct the working medium into contact of samples. ICZ