SU1467440A1 - Apparatus for investigating properties of lubricating material of friction pairs - Google Patents

Abstract

This invention relates to a testing technique. The goal is to bring the test conditions closer to the actual operating conditions of the gearing by determining the recovery rate of the oil film. Feed the lubricant in the hole

Description

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The invention relates to a test technique and can be used to study the performance of a lubricant in simulating gearing conditions.

The aim of the invention is to approximate the test conditions to actual operating conditions of the gearing by determining the recovery speed of the oil film.

The drawing shows a diagram of the device.

The device comprises a housing made in the form of a base 1, an intermediate ring 2, a sleeve 3 and a casing 4. A base 1, a ring 2 and a sleeve 3 are connected between it by three bolts 5.

The housing is designed to accommodate a lubricant. The device also contains a rotation drive (not shown), two holders 6 of sample 7, two loading assemblies 8 connected to them, a counter-sample made in the form of a ring 9, a measuring force of friction made in the form of two flat elastic elements 10 s, two strain gages . One of the sample carriers 6 is connected with one of the flat elastic elements 10 to the sleeve 3. A drive 11 of the oscillating movement of one of the holders 6 is connected with it and the other holder 6 of the sample 7 by the second flat elastic element 10 eccentrically and rigidly connected to corresponding holders 6 with two disks 12 with central holes and with half-ring through grooves at the same distance from the center as the holders 6 of the samples 7, which are spread in the corresponding ring through grooves, with a stepped shaft 13, on which m coaxially to each other

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rigidly ring 9 and with the possibility of swinging around their axes two disks 12, the holders 6 of the samples 7 are made in the form of rods, one ends of which are connected to the corresponding loading nodes 8, and the others are designed to fasten the corresponding samples 7j made in the form of balls or rollers. A stepped shaft 13 is mounted in a housing on a thrust bearing 14, a radial bearing 15 and a roller bearing 16, and glands 17 and 18 are used to prevent lubricant leakage. The ring 9 is attached to the stepped shaft 13 with a cap nut 19. Samples 7 are attached to the holder 6 with nuts 20. A rack 21 is rigidly connected to the drive. 11 swinging and articulated with one of the loading units 8. Krischka 22 is rigidly connected with the drive 11 of the oscillating motion and is articulated with another loading unit 8, Hole, B, 6 ui for po.-. cottages and drain coolant and lubricant.

The device works as follows.

A lubricant is fed into the friction unit through the opening 6, and the opening 2 is closed (if friction pairs are to work under conditions of flowing lubricant, the oil is supplied through opening 6 and discharged through opening g). and 5. After the required temperature is reached, the rotational drive of the stepped shaft 13 with the ring 9 is turned on, while the samples 7 are diametrically opposed to the load of the pair of friction.

Upon completion of the run-in of samples 7 with the ring 9, with the help of the drive 11, the swinging motion approximates one

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sample 7 to another. The change in friction moment is determined. With a spasmodic increase in the moment of friction forces, the rotational drive is stopped, the rotational speed of the ring 9 is known, the angle between the samples 7, the time of rotation of the ring 9 to the torque is determined

This time is the time of restoration.

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Claims (1)

Invention Formula A device for examining the properties of a lubricant, friction pairs, comprising a housing designed to accommodate a lubricant, a rotational drive, two sample holders connected to it, respectively, two loading units, a counter piece, ring shaped, a measuring force of friction, complete the form of a flat elastic element with a strain gauge and connecting one of the sample holders with the body, characterized in that, in order to approximate the conditions of 0 c 0 five trying to actual conditions of gearing engagement by determining the recovery rate of the oil film, it is equipped with a swinging motion drive of one of the holders connected with it and with another sample holder with a second flat elastic element with a second strain gauge eccentrically and rigidly connected to the corresponding holders with two discs with central holes and with half-ring through grooves at the same distance from the center as the sample holders, which are placed according to ringed through grooves, a stepped shaft on which coaxially anti-ribbons are mounted coaxially with each other and with the possibility of swinging around their axes two disks, and the sample holders are made in the form of rods, one ends of which are connected to the corresponding load nodes, and for fastening appropriate specimens.