The distinction of abrasive wear in mechanical seal applications-

The distinction of abrasive wear in mechanical seal applications

　2017-04-06　　

The distinction of abrasive wear in mechanical seal applications

Generally speaking, in the application of mechanical seals, three-body wear is mostly high-stress grinding abrasive wear, such as jaw crushers, ball mills, etc. At this time, a higher compressive stress is generated at the junction between the abrasive and the metal surface, which is greater than the crushing strength of the abrasive, and the metal surface is strained. For ductile materials, surface plastic deformation or fatigue can occur; for brittle metal materials, chipping or flaking can occur. Two-body abrasive wear can be tooth-cut abrasive wear, such as the destruction of broken pieces such as the hammer head of a crusher. At this time, the abrasive produces a separate impact stress on the surface of the material, so that the material on the metal surface is impacted by the abrasive, a deeper groove is ground, and large particles of material fall off the surface. Two-body abrasive wear can be low-stress wear, such as the damage of parts such as conveyors and ploughshares. At this time, the stress of the abrasive on the surface of the material does not exceed the crushing strength of the abrasive, so the metal surface has bruises or tiny cutting marks.

Generally speaking, abrasive wear is a kind of 'micro cutting process'. Abrasives will subject the surface layer materials to alternating deformations, resulting in alternating contact stresses that cause fatigue damage to the surface. However, the mechanical action of abrasive particles on the surface always occupies a dominant position.　　386.html,

Abrasive wear in mechanical seal applications 　　 Fatigue wear in mechanical seal applications