Fretting wear of mechanical seal-

Fretting wear of mechanical seal

　2017-06-07　　

Fretting wear of mechanical seal:

In the application of mechanical seals, especially KS mechanical seals, the wear phenomenon between two surfaces due to relative vibration with small amplitude is called Fretting.

If the fretting wear of this kind of mechanical seal is produced, the chemical reaction between the two surfaces plays a major role, it is called Fretting corrosion.

If there is a certain pressure between the surfaces that are in contact with each other to make the surface peaks adhere, the adhesion point will be continuously sheared due to the vibration caused by the small external amplitude. During the shearing process, the bonding point will gradually be oxidized, which will produce Red-brown Fe2O3 wear debris. This process is continuing, the oxidized wear debris is separated from the body, and the adhesion point is destroyed. At the same time, these wear debris can be used as an abrasive, causing abrasive wear on the contact surface. When the wear area continues to expand, it will finally cause contact. The surface is completely destroyed. This is the mechanism of fretting wear.

It can be seen that this kind of wear of the mechanical seal is a composite form of wear. Adhesive wear, abrasive wear, and corrosion wear exist at the same time, but the main effect is the oxidation caused by the external fretting of the adhesion points between the surfaces. process. Therefore, it can be classified into the scope of corrosion wear.　　396.html,

The three stages of mechanical seal wear process 　　 mechanical seal corrosion and wear