The base of the pump is a skid-type platform modified with old shovel rods, so that it is easy to drag when moving frequently. Four 16t hydraulic presses are installed at the four corners of the shovel platform to adjust the pump's lifting and smoothing. Under the press, the sleeper is padded. When the water in the ditch rises, the pump base can be quickly raised to ensure that the pumping of the pump is not affected when the water is raised.
When the pump base is raised, the pumping pipe connected to the pump body has an influence on the lifting of the pump body. A φ219 mm hose can be added at the joint between the two ends of the pump body and the water pumping pipe, and the flange is connected. The pipe is guaranteed to have sufficient free inclination. The improved effect is improved by a pump for the drainage facilities of the ditch. When the rainwater in the ditch rises, it is not necessary to disassemble the water pump, and the pumping is not interrupted, ensuring timely drainage of the 1460 ditch, which is conducive to the timely discharge of the flood. At the same time, it also avoids the disadvantages of driving the flood control to the high point of the slope when the electric shovel is under heavy rain, ensuring the production efficiency of the equipment.
One company has using a double-suction centrifugal pump with packing seal, which has serious water leakage for a long time (splashing outward). It was thought that the packing was worn, but the newly changed packing was ground into a powder shape for about one week, still not sealing. , seriously affected the operation of the pump. The reason for the analysis of the water leakage of the packing should be that the packing gland is not tightened, and the packing is ground into a powdery shape because the packing gland is pressed too tightly, so that the packing is tightly wrapped on the sleeve to increase friction. After the new packing is changed, it can leak intermittently, and the causes of these two phenomena are contradictory. This eliminates the possibility of failure due to the tightness of the packing gland. Then there is a possibility that the installation position of the water seal ring is inaccurate, the hole on the water seal ring is not aligned with the water seal pipe mouth, and the high pressure water cannot enter the packing chamber to accelerate the wear of the packing. After all the possibilities have been ruled out, it is thought that this phenomenon occurs accidentally in this pump, and if other pumps have a stuffing box failure, the above discriminating method can quickly find the cause, namely:
(1) When the pump is running or in variable working condition, there will be a large turbulence or radial runout. The turbulence or bounce of the rotor is extremely destructive to the packing and will be pulled in a short time.
(2) If it is in variable working condition, the actual lift will be greater than the rated lift. The high lift water will enter the water seal ring through the water seal pipe to act on the packing, which will accelerate the wear of the packing and increase the leakage. Large, a little longer, the filler wears to a certain extent and gradually becomes a powder. Solution The treatment method of the boring shaft adopts a thrust bearing to replace the original oil seal ring, and the thrust bearing is abutted against the bearing bush. A steel pipe with the same radial dimension as the bushing is sleeved between the rotor bushing and the thrust bearing to realize the rotor shaft.
