RU1775567C - Sliding bearing shell - Google Patents

Abstract

Use, high-speed sliding bearings. SUMMARY OF THE INVENTION: A solid anti-friction alloy with local grooves on a work surface is fixed on the base. A soft anti-friction alloy is placed in the grooves. The grooves are made at an angle a to the sliding direction of 15 [deg.] and with their interaxal distance not exceeding 10 mm. A groove with a width not exceeding 15 mm and filled with a soft antifriction alloy is made in the middle part of the working surface on a hard antifriction alloy. 2 ill.

Description

The invention relates to devices for the normal operation of machines, and more specifically to plain bearings, and can be used in engines with high sliding speeds

Known liner sliding bearing containing a base made of steel, on the inner surface of which are fixed two anti-friction alloys. One of them is solid and solid based on aluminum and copper. The other is made of a soft antifriction alloy such as babbitt, located in grooves made on the surface of a solid antifriction alloy with an interaxial distance not exceeding 10 mm at an angle a to the sliding direction of 15 °. The layer of soft antifriction alloy is designed to provide a running-in of the working surface of the liner with the neck of the shaft and the absorption of foreign bodies.

However, as a result of crushing the grooves to their full depth, which results from running-in of the working surface of the liner, which is formed when the generatrix of the shaft neck is misaligned with the generatrix of the liner, the role of the grooves loses its significance and the wear of the shaft-bearing pair increases.

The aim of the invention is to increase durability at low specific operational loads by increasing the running-in properties of the liner working surface.

This is achieved by the fact that in the liner of a sliding bearing containing a base with a solid antifriction alloy fixed on it, made with local grooves on the working surface, in which the soft antifriction alloy is placed, the grooves are made at an angle a to the sliding direction of 15 ° , and with an interaxial distance not exceeding 10 mm, in its middle part on a solid antifriction alloy

with

XJ XI SL SL Os XI

Foam groove with a width not exceeding 10 mm, filled with soft antifriction alloy

In FIG. 1 shows a plain bearing insert with a groove made on a hard anti-friction alloy in cross section; in FIG. 2 is a scan of the working surface of the bearing shell of FIG. 1.

The plain bearing insert contains a base (frame) 1 made of steel, on the inner surface of which two anti-friction alloys 2 and 3 are fixed. Alloy 2 is made solid (based on aluminum or copper) and solid. Alloy 3 is made soft (such as babbitt) and placed in grooves 4, the surfaces of which are coated with an intermediate layer 5, for example, based on nickel. The grooves 4 are made on the surface of the solid antifriction alloy 2 at an angle a to the sliding direction equal to 15 ° and with an interaxial distance not exceeding 10 mm. Alloy 3 is intended to provide anti-seize ability, run-in of the working surface of the liner with the neck of the shaft and the absorption of foreign bodies. In order to increase durability at low specific operational loads by increasing the running-in properties of the liner working surface in its middle part, a groove 6 with a width not exceeding 15 mm filled with a soft antifriction alloy is made on the hard antifriction alloy 3.

The width of the groove b is determined empirically depending on: the diameter of the neck of the crankshaft, the width of the liner and the accuracy of the thickness of the wall of the liner and the diameter of the neck of the shaft.

The running-in of the working surface of the liner with a groove filled with a soft antifriction alloy, with the neck of the shaft, occurs to a depth of 0.01 mm and below

the angle of contact of the neck of the shaft with the generatrix of the inner surface of the liner, equal to

21-3

Such liners are used in engines of compressors, turbines and other machines

Claims (1)

with high sliding speed (more than 25 m / s) and low specific operational load on the liner. SUMMARY OF THE INVENTION A plain bearing insert comprising a base with a solid anti-friction alloy fixed to it, made with local grooves on a work surface in which a soft anti-friction alloy is placed, grooves are made at an angle a to the sliding direction equal to 15 °, and with their center distance not exceeding 10 mm, characterized in that, in order to increase durability at low specific operational loads by increasing the running-in properties of the liner working surface, its middle part on a solid antifriction alloy, a groove is made with a width not exceeding 15 mm, 5 filled with a soft anti-friction alloy. FIG. 2