SU1490596A1 - Installation for testing materials in liquid-abrasive medium - Google Patents

Abstract

The invention relates to wear tests and can be used to examine materials for the wear conditions of parts of centrifugal pumps, mechanical seals and other assemblies operating with a guaranteed gap between the wearing surfaces. The purpose of the invention is to approximate the test conditions to the conditions of operation of the friction pairs operating with clearance. The installation includes a housing 1 with a sealed chamber, a shaft 3 with rotational drive mounted on a movable carriage 7. The shaft 3 is equipped with a centrifugal wheel 10 made in the form of a truncated cone with blades 11 and 12. A paddle stirrer 14 is attached to the small end of the wheel 10 and samples 16. The tanks 15 and the chamber of the housing 1 are connected to the lines 20 and 21, respectively, of the supply and removal of the working medium. The movable carriage 7 is displaced and the required clearance between the samples 16 and contra-ridges 17 is established. The drive of the rotation of the shaft 3 is turned on and the rotation of the wheel 10 provides circulation of the working medium in the circulation circuit. After testing, the samples are weighed. 3 il.

Description

A wheel 10, made in the form of a truncated cone with blades 11 and 12. A blade mixer 14 and samples 16 are connected to the small end of the wheel 10 and samples 16. Highways 20 and 21 are connected to the tank 15 and the chamber of the housing 1, respectively, to supply and discharge the working medium. The movable carriage 7 is moved and Tpe6yeNtt fi sets the gap between the samples 16 and counterblades 17, actuates the rotational drive of the shaft 3 and rotates the wheel 10 to circulate the working medium in the circulation circuit. The test triggered. 3 il.

The invention relates to wear tests and can be used to examine materials for the wear conditions of parts of centrifugal pumps, mechanical seals and other assemblies operating with a guaranteed gap between the wearing surfaces.

The purpose of the invention is to approximate the testing conditions to the conditions of operation of the nara friction operating with a clearance. FIG. Figure 1 shows schematically the proposed plant for testing materials in a liquid - abrasive medium; on fng. 2 shows a section LL of FIG. one; pas figs. 3 shows a section BB in FIG. one.

The installation includes a housing 1 with a sealed chamber, mounted on a base 2, a shaft 3 with a rotational drive consisting of an electric motor 4 connected via a belt drive 5 with a pulley 6 connected to va-. scrap 3. The drive of the chain is mounted on the movable footprint 7, which is located on the rack 8 of the base 2 and is movable by means of a screw mechanism 9 along the axis of the shaft 3. The latter is equipped with a centrifugal 1 m wheel 10 made in the form of a truncated cone large ends, and hoops 11 and 12, located respectively on the large end and on the conical surface. To the small end of the wheel 10 there is attached a rod 13, on the end of which a blade broom 14 is fixed, which is located in the container 15. At the small end of the wheel 10 there are 16 shaped images, and a counter piece 18 is located coaxially to the rod 13. . To the tank 15 and the chamber of the housing 1 are connected highways 20 and 21 for supplying and discharging the working substance, forming with the refrigerator 22 a lock 5

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five

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KNUTS circulating KSPTur. P. 1I

control of the gap 5 between sample 16 and counterblocks 17 in case Biii is filled with a hole with a plug 23, and a movable sos-dgp rlt carriage with indicator 24 displacement (mp- {11. Iship; - vaem1) with a sample run. Puns in P1- (ds of segments with chamfers 25. OC and gps there are channels 26 for isp metamet of the medium.

Installation raPo Chgeg with,; duks: 4th ob- R and 3 ohms.

C-rags are fixed 16 and cotizabera, 17, ikruchipp and cap 23, displacements are made; 1) 7 carriages. The gap Osu1: is supplied with an indicator 24 or a probe (not shown) through the hole through the plug 23. I bntpj - do not contain the plug 19 and fill the chamber 15 and the chamber with the medium through the hole. IiKJIuchuyu drive the rotation of the shaft 3 and with P (.iws of centrifugal forces create pressure and movement of the medium along the track. Paddle gear 14 prevents the abrasive parts from being deposited and contributes to a more uniform flow of the medium to the samples 16. particles hitting the gap. To change the conditions for the abrasive particles to enter the gap, no chamfer 25 on the specimens can be released. After the test, samples 16 are removed from the cam and their wear is determined.

F o rm At l and inventions

An installation for testing materials in a liquid-abrasive environment, comprising a housing with a sealed chamber, a supply and exhaust line

media connected to the chamber, a shaft with a rotation drive mounted in the chamber, a sample holder of materials connected to the shaft, a counterblade mounted in the chamber coaxially to the shaft, and a device for axial movement of the sample relative to the counterpiece connected to the shaft, so that, in order to bring the test conditions closer to the conditions of use of friction pairs operating with a gap, it is equipped with a centrifugal wheel with 96

pastes made in the form of a truncated cone, the larger base of which is facing the shaft, with a container located in the chamber opposite the smaller base of the truncated cone and located in the container with a stirrer coaxially with the shaft with a rod connected to the centrifugal wheel;

the smaller base of the truncated cone, and the chamber with the container and main lines for supplying and discharging the working medium form a closed circulation loop.

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sixteen

FIG. Z

25

25

Fig.Z

Claims (1)

Claim Installation for testing materials in a liquid-abrasive medium, comprising a housing with a sealed chamber, supply and exhaust lines in communication with the chamber, a shaft with a rotation drive installed in the chamber, a sample holder of materials connected to the shaft, a counter sample installed in the chamber coaxially to the shaft , and a device for axial movement of the sample relative to the counter-sample, associated with the shaft, characterized in that, in order to approximate the test conditions to the operating conditions of the friction pairs working with a gap, it is equipped with with a centrifugal wheel with blades made in the form of a truncated cone, the larger base of which faces the shaft, with a container located in the chamber opposite the smaller base of the truncated cone, and a stirrer coaxial with the shaft and a rod connected to the centrifugal wheel, holder 10 material samples mounted on a smaller base of the truncated cone, and a chamber with a tank and lines for supplying and discharging the working medium form a closed circulation circuit.