water pump mechanical seal common leakage phenomena and countermeasures
Water pumps are one of the most important components of industrial and daily life. Most water pumps are equipped with mechanical seals to ensure that the water does not leak during the operation of the pump. However, during normal use, the mechanical seals of water pumps often cause leakage, which can cause equipment damage, environmental pollution, and production losses, so it is necessary to find the cause and take measures to prevent such leakage problems.
Common mechanical seal leakage problems are as follows:
1) Improper assembly. The mechanical seal of the water pump is subject to high pressure and large thrust during the operation of the pump, so the assembly error and sealing surface destruction will finish cause the leakage of water. Therefore, the mechanical seal must be properly assembled to avoid such problems.
2) Unstable multi-stage pressure difference. If the pressure difference between the two chambers of the pump is too large, it will cause the pressure imbalance on the seal surface, making the mechanical seal lose its sealing performance and cause leakage.
3) Leakage of packing seal. In the structure of the water pump, the packing between the water inlet and outlet is a fixed leak point. If the packing seal is too tight, it will cause the seal surface to be destroyed and cause leakage.
4) Corrosion or wear of the sealing surface. In the process of using the water pump, the internal friction force or external corrosion can cause the mechanical seal to lose its sealing performance, which will directly cause the leakage of water.
To prevent mechanical seal leakage of water pumps, the following countermeasures can be taken:
1) Increase seal area. The increased seal area can reduce the pressure difference of the two faces, reduce the superimposed force of the seal, and increase the displacement of the seal face, thereby reducing leakage.
2) Reduce the working pressure of the pump. Reasonable adjustments can less the pressure difference between the inlet and outlet of the pump, reduce the superimposed force of the seal, and improve its performance.
3) Regularly checking and replacing mechanical seals. The operator should regularly inspect the condition of the mechanical seal, because the fatigue of the seal material or the corrosion and wear of the seal surface will cause its sealing performance to decrease or disappear, resulting in leakage of the pump.
4) Change the structure of the packing. Increasing the flexibility of the packing or changing its structure can reduce its contact force with the mechanical seal and reduce leakage.
In conclusion, proper measures are essential to reduce mechanical seal leakage. Proper assembly of the mechanical seal and regular inspection and replacement of seals should be taken seriously to ensure the safe operation of the water pump and reduce leakage.
