Everyone, please help analyze the reasons for the seal damage
Thread Content
Could everyone please help analyze the reasons for the damage to the mechanical seal?
Send the structure diagram of the sealed chamber and the mechanical seal structure; also provide information regarding the medium used. Photos of the mechanical seal alone aren’t sufficient for an assessment
The medium is high-salt wastewater, and the pump is an IHF50-32-200 pump
Judging from this structure, it seems that some parts of the moving ring have suffered excessive wear; wear particles, as well as recrystallized substances or accumulated particulates, cause friction between the stationary ring and the shaft, and the vibrations lead to cracking of the stationary ring
Silicon carbide is inherently brittle, and high-salt solutions may crystallize due to the high temperatures at the silicon carbide bearings; these crystals can cause damage to the silicon carbide.
It must be that the temperature became too high after some time passed, causing it to burn
Our company used to be the same way too – the machine seals for new equipment had to be replaced every day. Based on production experience, there are mainly two reasons: 1. Operational errors – it was not detected after the material was cleared, and the pump was not stopped in a timely manner. 2. High-salt wastewater is a supersaturated solution, or the materials tend to crystallize and block the pipes. Clogging is likely to occur before the pump, caused by the pump running idle. If you have wastewater treatment equipment such as MVR multi-effect systems, you will find that pumps used for treating high-salinity wastewater generally come equipped with cooling water for the mechanical seals. There is a big difference between external machine seals and internal machine seals.