Wearing rings are used primarily for what purpose?

Wearing rings are primarily used to prevent wear on the impeller or casing in various mechanical systems, particularly in pumps and compressors. These rings act as a protective barrier, minimizing the direct contact between the rotating parts (like the impeller) and the stationary parts (like the casing). This is crucial because the constant interaction can lead to material degradation over time, resulting in performance loss and increased maintenance costs.

By incorporating wearing rings, engineers can extend the lifespan of these components, which is vital for the overall efficiency and reliability of the machinery. They are typically made of hard materials to withstand the erosive effects of the fluid being handled, ensuring that both the impeller and casing maintain their integrity during operation. Therefore, their role is not just about protection—it also plays a significant part in maintaining the efficiency and longevity of the equipment as a whole.