GB/T 2889.2-2020 in English

GB/T2889.2-2020, as the basic terminology standard in the field of sliding bearings, systematically standardizes 61 professional terms related to friction and wear of sliding bearings. This standard is equivalent to the ISO43782:2017 international standard, and the technical content remains highly consistent.

Mechanical wear

The standard defines 7 types of mechanical wear in detail, among which abrasive wear and adhesive wear are the most common:

• Abrasive wear: Ploughing effect caused by hard particles, common in mining machinery
• Adhesive wear: Material transfer caused by intermolecular forces, often occurs in high temperature conditions

Mechanochemical wear

Special emphasis is placed on the synergistic effect of environmental media and mechanical action. Freak corrosion is a typical form of composite wear.

The standard clearly defines the calculation methods of three core parameters:

1. Friction factor μ=F/P: ratio of friction force to normal load
2. Wear rate: material loss per unit time/distance
3. Equivalent wear rate: normalized wear index considering load factors

Design application

It is recommended to use the friction angle concept defined in the standard to evaluate the self-locking performance during the sliding bearing design stage.

Fault diagnosis

The difference between oil film oscillation (3.5.1) and oil film vortex (3.5.2) can be accurately described according to standard terminology:

• Oscillation frequency ≈ first-order critical speed
• Vortex frequency ≈ 0.5×rotational frequency