The choice of mechanical seals for multistage centrifugal pumps is mainly due to the more sealing performance requirements. If the rotary equipment is in operation and there is no sealing device between the pump casing and the shaft, the medium will flow directly from the place. If it is toxic or harmful medium, If there are safety problems, there is no special requirement, the packing seal is used at this place, mainly because the cost is low; if the working conditions are high, the mechanical seal needs to be selected, the flushing scheme is matched to achieve good sealing performance, and the mechanical seal has good service life. Long is also not possible with fillers.
Mechanical seals are an extremely important component in centrifugal pump components. They are designed to prevent leakage of the transport medium and improve the efficiency of the centrifugal pump. For the transportation of special acid-alkaline media and chemical liquids, the mechanical seal can prevent problems such as loss and pollution caused by media leakage. Therefore, the mechanical seal inspection of the centrifugal pump is more important in the daily component inspection of the centrifugal pump. The mechanical seal inspection of the centrifugal pump includes the following six points:
1. Check the inside of the mechanical seal of the centrifugal pump for impurities such as sediment or welding slag.
2. Check the surface of the dynamic and static ring of the mechanical seal of the centrifugal pump for defects such as scratches and cracks. These defects may cause serious leakage of the mechanical seal.
3. Check if there are any defects affecting the seal in the static and dynamic ring seat. For example, if the static and dynamic ring seat and the static and dynamic ring sealing rubber ring have matching surfaces, there are defects such as scratches.
4. Check whether the mechanical seal compensation spring is damaged or deformed, and whether the reluctance coefficient changes.
5. Check the seal bushing for defects such as burrs and groove marks.
6. Clean and inspect all seal rubber rings for defects such as cracks and pores, and measure whether the diameter of the rubber ring is within the working range.
7. The mechanical seal with the pumping mechanism should also check whether the spiral of the screw pump has defects such as cracks and broken wires.
