SU1511635A1 - Friction machine for assessing the lubricating ability of lubricants of friction pair - Google Patents

Abstract

The invention relates to machine building and instrument making. The aim of the invention is to improve the accuracy of lubricity assessment of lubricants by continuously removing the spent lubricant with wear products from the surface of the friction and a constant uniform supply of fresh lubricant to the surface of the friction. The friction machine contains a movable holder 1 with a rotational drive, in which an element of a pair of friction is fixed — a disk counter piece 2, in contact with three fixed elements of a pair of friction — test samples 6 fixed evenly around the circumference in a fixed holder 5 located coaxially with counter piece 2, having the ability axial movement. At the same distance from the axis of rotation of the movable holder 1 for each stationary test sample 6, a feed head 11, made of an antifriction material, is pressed against the friction surface of the disc counter piece 2 by a pressure spring 13. Through the hole in the feed head 11, the lubricant 16 under test is fed the surface of the friction disc counterpiece 2 in an even layer, the thickness of which depends on the distance between the surface of the friction training of counterpiece 2 and the end face of the feed head 11. In this case, the front edge uA feed head 11 is formed as a scraper which removes from the surface friction of spent lubricant with wear products. 3 il.

Description

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friction disc 2, the pressure spring 13. Through the hole in the feed head 1, examine the lubricant 16 is applied to the surface of the friction disc 2 coitroblite with an even layer, the thickness of which depends on the distance between

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the surface of the friction of the counterpiece 2 and the end face of the feed head 1. In this case, the front edge of the feed head I1 is made in the form of a scraper, which ensures the removal of waste lubricant with wear products from the surface of the friction surface. 3 il.

The invention relates to machine building and instrumentation engineering, in particular to installations for tribological testing of materials, in particular lubricants of a friction pair.

The purpose of the invention is to improve the accuracy of lubricity assessment of lubricants by continuously removing spent lubricant with wear products from the surface of the friction and a constant uniform supply of fresh lubricant to the surface of the friction.

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FIG. I shows a diagram of the friction machine J in FIG. 2 — section A — A in FIG. 1; figure 3 - section bb in fig. one

The friction machine contains a movable holder 1 with a rotation drive, made in the form of a disk, on the end surface of which there is an element of a pair of friction - a disc-shaped counter piece 2. The holder 1 is installed in bearings 3 and is capable of accepting axial load by means of a thrust bearing 4. Fixed the holder 5, in which three fixed elements of the friction pair — test specimens 6, are fixed evenly around the circumference, is mounted with the possibility of axial movement and through the pusher 7 mounted in the housing cover 8 9 is associated with a loading mechanism 10. The transfer of force from the pusher 7 to the fixed holder 5 is made in the form of a first joint, which results in alignment and self-installation of samples 6 relative to counterpiece 2. In the fixed holder 5 for each sample 6 three power heads 11 are installed, and their installation is done by means of a bracket 12 and pressing springs 13

at the same distance from the axis of rotation as samples 6, but mixed relative to them at an angle of about. Thanks to the use of a pressure spring of ge 13 reach 5 20

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30 -j 40 5

50

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Continuously pressing the feed head I1 to the friction surface of the counter piece 2. To minimize the friction between the counter piece 2 and the feed head 11, the feed head 11 is made of an anti-friction material. The feed head 11 is provided with an opening for supplying the lubricant under investigation to the friction surface 2 of the counter-sample 2, and its leading edge is made in the form of a scraper to remove the spent lubricant with wear products from the friction surface.

Through pipelines 14, all of the 1e of the head 1 1 is connected a1 to the piston lubricator 15, in the inner cavity of which the lubricant 16 is investigated. Moving the lubricant 15 of the lubricant 15 is the force of the screw press 18, the screw screw 19 of which is rotated through the clutch 20 and the gearbox 21 of the electric motor 22.

The friction machine works the following way.

A disk counter piece 2 was preliminarily placed in the movable holder, and test samples 6 were placed in the Fixed holder 5. Then, a uniform layer of the lubricant 16 under test was applied to the friction surface of the disc counter sample 2. The piston lubricator 15 was filled with the test lubricant 16 and through conduit 14, is connected to feed head 11.

The motor 22 of the screw press 18 is turned on, as a result of which the lubricant material 16 is squeezed out of the internal cavity of the piston lubricator 15 and enters the supply head I 1 through line 14. According to the code 5, 5

the stationary lubricant 16 is mounted from the hole in the feed head 11

5 along with test samples

6 to the internal cavity of the housing 9. Install the bolt 8 together with the pusher 7 and load the test specimens 6 with axial force using the loading mechanism 10. In this case (due to the ball joint of the pusher 7 with the fixed holder 5), the test samples 6 are set up relative to the counter piece 2. The rotational drive of the movable holder I is turned on, in which the disk counter piece 2 is located, and the test pieces 6 are rubbed by the counter piece 2. the counterpiece 2, the feed head 11, pressed against the surface of the friction by the pressure spring 13, with its front edge made in the form of a scraper, removes the used lubricant from the noBiepx of the friction IAL to wear products. At the same time, the lubricant under study 16 exiting from the orifice PI5

The melting head 11 is constantly applied with a uniform layer to the friction surface of the disc counter piece 2, and the thickness of this layer depends on the distance between the friction surface of the disc counter piece 2 and the end of the feed head 11 (FIG. 3),

Claims (1)

Invention Formula A friction machine for evaluating lubricity of lubricants — friction pairs containing a fixed the holder of one of the friction pair elements, the holder of the other element of the friction pair with its rotation drive, the loading mechanism, the lubricating capacitor and the feed head associated with it, designed to deliver the lubricant under investigation to the friction surface, In order to improve the accuracy of the estimate, the feed head is made of an antifriction material and has a scraper and a spring designed for pushing it towards the surface of the friction. Phie.1 Thebes, 3