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Identify if the plain bearing is damaged

Author:admin   Date:2022-11-18
When we use sliding bearings, we often find that this sliding bearing is different from the original. Let's take a look at why this is now.

When the sliding bearing is in operation, friction will occur due to the contact between the journal and the bearing bush, which will cause the surface to heat up, wear and even "seize". Therefore, when designing the bearing, the sliding bearing material with good friction reduction should be used to make the bearing bush, and suitable lubricants And adopt suitable supply methods, improve the structure of the bearing to obtain thick film lubrication, etc.

1. Strain on the journal surface: There are iron-based cutting abrasive particles or black oxide particles in the ferrography, and there is a tempered color on the metal surface.

2. Bearing wear: Due to the metal characteristics of the sliding bearing shaft (high hardness, poor concession) and other reasons, it is easy to cause adhesive wear, abrasive wear, fatigue wear, fretting wear and other conditions.

3. Corrosion of tile surface: Spectral analysis found that the concentration of non-ferrous metal elements was abnormal; there were many sub-micron wear particles of non-ferrous metal components in the spectrum; the moisture content of lubricating oil exceeded the standard and the acid value exceeded the standard.

4. Fretting wear of tile back: Spectral analysis found that the iron concentration was abnormal, there were many sub-micron wear particles of iron composition in the ferrography, and the moisture and acid value of the lubricating oil were abnormal.

5. Bearing burning tile: There are many large-sized alloy abrasive grains and ferrous metal oxides in the iron spectrum of sliding bearings.

6. Tile surface spalling: There are many large-sized fatigue spalling alloy wear particles and layered abrasive particles found in ferrography.

7. Strain on the bearing surface: There are cutting abrasive particles found in the ferrography, and the abrasive particles of the sliding bearing are non-ferrous metals.

8. Surface corrosion of the journal: Spectral analysis found that the iron element concentration was abnormal, there were many sub-micron particles of iron composition in the ferrography, and the moisture content of the lubricating oil of the sliding bearing exceeded the standard or the acid value exceeded the standard.

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