During the operation of the pump, impurities deposited or formed in the sealed cavity must be flushed. Now shaft seal devices generally use mechanical seals. According to statistics, the failure of the mechanical seal causes the failure of the pump to account for more than 50% of the equipment failure rate. Analysis of the cause of mechanical seal leakage. The working principle of the centrifugal pump and the function of the mechanical seal device.

The mechanical seal is one of the main wearing parts of centrifugal pumps, so most of the pump failures are caused by seal failure. When the newly installed (or replaced) mechanical seal is put into operation, the leakage should be within the allowable Self-Priming JET Pumps range. Auxiliary facilities of mechanical seal-flushing device Flushing device is the main auxiliary facility of mechanical seal. Second, the principle of mechanical seal

The mechanical seal is an axial end face sealing device that relies on the pre-tensioning of the dynamic and static ring end face seal pairs by the elastic element and the compaction of the medium pressure and the pressure of the elastic element. In order to reduce leakage, shaft end sealing devices are generally installed at the static and dynamic gaps.

If there are no problems with the structure, manufacturing quality, installation and use of the seal itself, its life span will exceed 8000h. As long as the impeller keeps rotating, the liquid will be sucked and discharged continuously. 3. The end faces of the moving ring are pressed against the end faces of the static ring by the pressure of the liquid in the sealed chamber, and an appropriate specific pressure is generated on the end faces of the two rings and the layer is kept extremely thin