1. Clean the heavy oil pump packing box and check the shaft surface for scratches and burrs. The stuffing box should be clean and the shaft surface should be smooth. 2. Check the shaft runout. The unbalance of the rotor jump should be within the allowable range to avoid excessive vibration and unfavorable to the packing. What are the repair methods for the tar gear pump packing seal?
1. Clean the heavy oil pump packing box and check the shaft surface for scratches and burrs. The stuffing box should be clean and the shaft surface should be smooth.
2. Check the shaft runout. The unbalance of the rotor runout should be within the allowable range. Botaibang should avoid excessive vibration and is not good for the packing.
3. Apply a sealant or a lubricant compatible with the medium in the stuffing box and the shaft surface.
4. For the packing of the roll package, first take the wooden rod with the same size as the journal of the journal, wrap the packing around it, and then cut it with a knife. The knife edge is preferably 45° inclined.
5, the filler should be filled one by one, not a few at a time. The method is to take a filler, apply a lubricant, and hold one end of the filler interface with both hands, pull it in the axial direction to make it spiral, and then enter the journal from the slit casing. Do not pull in the radial direction to avoid the interface is not aligned.
6. Take a metal bushing of the same size as the stuffing box or a lower shaft hardness, push the packing into the deep part of the box, and apply a certain pressure to the bushing with the gland to pre-compress the packing. The amount of pre-compression is 5%~10%, and the maximum is 20%. Rotate the shaft one more turn and remove the sleeve. Botou Taibang Pump & Valve Manufacturing Co., Ltd. 7. Heavy oil pump fills the second and third roots in the same way. Note that when the number of fillers is 4~8, the interfaces should be staggered by 90° when filling; the two fillers are staggered by 180°; 3-6 are staggered by 120° to prevent leakage through the interface.
8. After the last packing is filled, the gland should be pressed tightly, but the pressing force should not be too large. At the same time, the shaft is rotated by hand, so that the assembly pressing force tends to parabolic distribution. Then relax the gland slightly.
9. The heavy oil pump is tested for operation. If it cannot be sealed, press some fillers; if the heat is too large, relax it. In this way, only when the droplet leakage and heat generation are small (the temperature of the filler part can only be 30 to 40 ° C higher than the ambient temperature), it can be put into use.
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