There are many kinds of washing and cooling of the mechanical seal of the pump:
1. Self flushing, flushing medium by the pump at the outlet end through the tube into the sealing cavity.
2. Back flushing, flushing medium by the pump inlet end through the tube into the sealing cavity for backwashing.
3. Through the washing, the self washing and backwash of the combination of the two structures known as through washing.
4. External flushing, the system is the pressure of the media into the sealed cavity, to change the flushing medium and sealed cavity medium the same, or the production process has no effect on the media.
In addition to the above mentioned types of flushing cooling methods, a kind of flushing cooling method is also adopted. The utility model is characterized in that a pump is used to pump the impeller, so that the medium in the sealing cavity can be recycled, and the friction heat of the end surface is removed. This method can be used when the pump inlet and outlet pressure difference is very small.
The above washing way is the use of differential pressure and cooling medium flow to achieve the washing purpose. Specific methods, according to the pressure, temperature and so on. Such as the general single-stage centrifugal pump, the sealing cavity pressure is less than the pump outlet pressure is greater than the inlet pressure, the use of self cooling or backwash cooling can be washed. When the sealing cavity adopts self flushing cooling. When the seal chamber pressure is close to the inlet and outlet pressure. When the temperature of the sealing medium is high, the external flushing cooling.
