SU938096A1 - Device for testing cylinder couplings for friction and wear - Google Patents

Description

(S) DEVICE FOR TESTING CYLINDRICAL CONCENTRATIONS FOR THREE AND WEAR

one

The invention relates to the testing of the tribotechnical properties of friction pairs and relates to a device for testing cylindrical mates such as cylindrical guides, plunger pairs, etc.

A device for testing friction and wear cylindrical matings is known, comprising a housing, an actuator, Q reciprocating motion, a countersample holder coupled to a reciprocating actuator through a spherical hinge, a specimen holder, measured by J5, the friction force mounted on the housing and coupled to the Sample Holder, and a loading mechanism that interacts with the counter piece. In the known device, the fur-.20 bottom loading is made in the s-illobum of the counter-specimen acting on the holder by means of flexible tubes.

A disadvantage of the known device is that it cannot reproduce the actual working conditions of the cylindrical mating, for example, a plunger pair, in which a variable component acts along with a constant radial load. In addition, the kinematics of motion of such a pair is characterized by the presence of a high-frequency component of the oscillatory motion along the axis of movement of the plunger against the background of its reciprocating motion.

The purpose of the invention is to bring the test conditions to real working conditions.

Claims (1)

This goal is achieved by the fact that the device for testing cylindrical friction matings and and; a foot comprising a body, a reciprocating motion drive, a counter piece, connected to the reciprocating motion by means of a spherical hinge. the sample holder, the friction force meter mounted on the body and connected to the sample holder, and the loading mechanism, which interacts with the counterpiece holder, is provided with an additional drive of the return-translation engine with a slider on which the main drive of the reciprocating movement is mounted, the loading mechanism is made in the form of two coaxially arranged springs interacting with one end of each of the last pushers interacting with the other end of each of the stop springs, the force driver, borrowing with one of the pushers, and an eccentric mounted in the housing with the possibility of rotation and interacting with the other pusher, and the holder of the counter piece between the stops. The drawing shows a device for testing cylindrical interfaces in a liquefied gas environment. The device comprises a housing 1, on which an additional actuator 2 of reciprocating movement with a slider 3 is mounted, on which the main actuator 4 of reciprocating movement is placed, which by means of a hinge 5 is connected to a holder 6 of counterpiece 7 A holder B of sample 9 is connected to a meter 10 of friction force, It is fixed in the housing 1. The loading mechanism of the test pair of friction is made in the form of two coaxially arranged springs 11 and 12, each of which, with its one end, interacts with the pushrods 13 and It, and the other end with stops 15 and 16. The pusher 13 interacts with the energizer 17, and the pusher 14 with an eccentric 18 mounted on the shaft 19 of the drive 20. The holder 6 of the counterpiece 7 is located between the stops 15 and 1b. Sample 9 and controler 7 are placed in a sealed working chamber 21 with screen-vacuum insulation 22 surrounded by a nitrogen shield 23 with foam thermal insulation 24. Measuring instrument 10 friction force is placed in a heat-insulating cup 25 and surrounded by a heat-insulating cover 2b. Two nozzles 27 and 28 are introduced into the internal cavity of the glass 25, designed to inflate neutral gas there. 964 The device operates as follows. Sample 9 and contra sample 7 are fixed in holders 8 and 6, respectively. Using springs 11 and 12, and force driver 17, an initial force is applied to press ontract 7 to sample 9. Drive 20 is turned on, from which rotation 19 is transmitted by shaft 19. I push the spring 11 by means of a pusher, creates an alternating force to press the contra-sample 7 against the sample 9. At the same time, the electric motor 20. includes the main k and the additional 2 reciprocating actuators, which are reported by the counter BG to 7 of the reciprocating movement, which imposed an oscillating axial movement. During the test, the friction force is measured by means of a meter 10. The wear of sample 9 and counterpiece 7 is determined after testing with one of the known methods, for example by weighing. The proposed device provides simulated operating conditions for various types of valve and control automation devices for reciprocating movement in a wide range of speeds, amplitudes and frequencies, which allows studying the influence of design, technological, operational factors, chemical composition, structure, strength level of rubbing materials, coatings, lubricants on the processes of friction and wear with the continuous registration of the forces of friction in the process of testing in the temperature range 20 - 290 K. The formula of the invention The device for testing friction and wear cylindrical mats, comprising a housing, a reciprocating motion actuator, a counterpiece sample connected to a reciprocating actuator by means of a spherical hinge, a specimen holder, a friction force meter mounted on the housing and connected to the specimen holder, and a loading mechanism interacting with a counter-sample holder, characterized in that, in order to bring the test conditions closer to the real ones. working conditions, it is equipped with an additional reciprocating drive with a slide, on which the main reciprocating drive is mounted, the loading mechanism is made in the form of coaxially arranged spring springs with one end each of the last pushers interacting with the other end of each spring. "About the zinov of the stops, energizer, inter / o 93809 5 6 and U Acting with one of the pushers, and an eccentric mounted in the housing with the possibility of rotation and interacting with the other pusher, and the counter piece 1b is installed between the stops. I Sources of information taken into account during the examination 1. USSR author's certificate ,, ;;: eT2lk} k3Q / 25-28. .one. F |. l.nn / “Mr. On aka -g J (prototype), cl. G 01 N:} / 5о.