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31
2020
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08
What problems can be caused by improper use of slurry pumps
Author:
The long-term use of the slurry pump has caused scaling on the surface of the cooler tube wall, resulting in poor heat transfer;
What problems can be caused by improper use of the slurry pump? How can we solve them to ensure the normal operation of the slurry pump?
1. The long-term use of the slurry pump has caused scaling on the surface of the cooler tube wall, resulting in poor heat transfer; Low cooling water volume or no cooling water added. Therefore, it is necessary to regularly check whether the pressure and flow rate of the bearing cooling water are suitable. Generally, the cooling water pressure of the slurry pump is 0.05-0.2MPa, and the cooling water flow rate is 1-3m3/h. The cooler with scaling should be replaced in a timely manner. Before starting the pump, the cooling water should be turned on to adjust the pressure to the specified value, and the temperature rise of the bearing should be checked regularly (at 35 ℃). The high temperature should not exceed 75 ℃.
2. During the use of the slurry pump, the sealing failure was caused by the wear of the filler, and the slurry leaked along the shaft seal. The slurry instantly filled the curved surface of the semicircular positioning hole connecting the bracket and the rear pump casing, and the slurry discharged from the discharge port did not have time to seep into the oil pool through the seal at the water baffle, causing bearing damage. In daily maintenance, attention should be paid to regularly detecting the leakage of shaft seal water. When the leakage increases, the bolts of the packing gland should be adjusted, and the packing and failed O-ring should be replaced in a timely manner to prevent leakage slurry from seeping into the bracket oil pool along the shaft from the water baffle seal.
3. Unclean lubricating oil can cause problems such as bearing friction, wear, temperature rise, and vibration. Friction and wear can be reduced by lubricating various parts of the bearing. The quality of the lubricating oil should be regularly checked to prevent dust or oil aging and deterioration. The lubricating oil should be strictly adjusted according to the pump user manual, and should not be too much or too little. If the oil is too much, it will not take away most of the friction heat inside the bearing, and it will not have an effective heat dissipation effect, and it will also increase the temperature rise of the bearing; If there is little oil, it will cause the bearing oil film to rupture and dry friction, burning the bearing.
The small problems with these slurry pumps can have a significant impact over time, and they should be inspected and repaired in a timely manner to ensure the normal use of the slurry pump.
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