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Using Dynamic Equilibrium Condition to Set Wear Particle Limits

The dynamic equilibrium condition of particles can be very helpful in setting wear particle limits for all types of machinery. With no pre-defined limits set by original equipment manufacturers, it often is difficult for equipment owners or oil analysts to establish condemnation levels for machines generating large quantities of normal (benign) wear particles. However, by using dynamic equilibrium models, end users can set alarm limits for assets with unique operating profiles. In this paper, two well-established mathematical models describing this condition are applied to real-world examples that show the time to equilibrium is not intuitively obvious. Understanding what level dynamic equilibrium occurs is critical to learning what is considered a normal or abnormal wear rate for any given machine.

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