Packing Seal Maintenance Method

1. Clean the packing box of the split case pump, and check whether there are scratches and burrs on the surface of the shaft. The packing box should be cleaned and the shaft surface should be smooth.

2. Check the shaft runout. The unbalance of the rotor runout should be within the allowable range, so as to avoid excessive vibration and adverse to the packing.

3. Apply sealant or lubricant suitable for medium on packing box and shaft surface.

4. For the packing packed in rolls, take a wooden stick with the same size as the journal, wind the packing on it, and then cut it with a knife. The knife edge should be 45 ° inclined.

5. The fillers should be filled one by one, not several at a time. The method is to take a piece of packing, apply lubricant, hold one end of the packing interface in both hands, pull it out along the axial direction, make it spiral, and then put it into the journal through the incision. Do not pull apart along the radial direction to avoid uneven interface.

6. Take a metal shaft sleeve of the same size material or lower hardness than the shaft of the packing box, push the packing into the deep part of the box, and apply certain pressure to the shaft sleeve with the gland to make the packing get pre compression. The preloading shrinkage is 5% ~ 10%, and the maximum is 20%. Turn the shaft for another circle and take out the shaft sleeve.

7. In the same way, load the second and third. Note: when the number of fillers is 4-8, the interfaces should be staggered by 90 degrees; two fillers should be staggered by 180 degrees; 3-6 pieces should be staggered by 120 degrees to prevent leakage through the interface.

8. After the last packing is filled, the gland should be used for compaction, but the pressing force should not be too large. At the same time, rotate the shaft by hand to make the assembly pressing force tend to parabola distribution. Then loosen the cover slightly.

9. Carry out operation test. If it can't be sealed, compress some packing; if the heating is too large, loosen it. It can be put into use only when the temperature of the packing is 30-40 ℃ higher than that of the environment.split case pump packing seal assembly technical requirements, the installation of packing seals, should comply with the provisions of technical documents.