The raw meal belt is usually used in the sealing priority area, and it is wrapped around the waist and other methods. In fact, there is a certain running in period at the sealing place. The manufacturer of the raw meal belt reminds that the raw meal belt should not be used in a hurry during the running in period, so as not to affect the service life.
When the friction surface of the raw meal belt seal is in the running in stage, the friction, wear and friction heat change greatly during this period, and then quickly enter the stable wear stage. At this time, the wear rate is small and almost unchanged, that is, the normal working stage of the seal, which is the severe wear stage. Because the surface is damaged, the temperature rises, and the changes in the mechanical properties of the materials make the wear amount sharply increase, resulting in the leakage amount exceeding the allowable value. For different seal structures and operating conditions, the wear rule of the friction pair of the raw meal belt seal is also different, so the process of wear affecting the seal is also different.
There are many wear forms of raw material belt, including adhesive wear, abrasive wear, corrosion wear, fatigue wear and fretting wear. The more serious wear form is abrasive wear, that is, the material is cut or scratched when foreign hard particles enter the sealing surface, or the normal leakage state is damaged due to the scouring effect of solid particles taken away by the fluid. In addition, corrosion wear caused by chemical or electrochemical reaction between friction materials and surrounding media is also a common wear form in seals.
When the raw material belt passes the running in period, the sealing performance will reach the extreme. The product description will also specifically indicate the relevant matters of the running in period to ensure the use effect.
