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For the safe operation of the pump, daily maintenance must be paid attention to. The maintenance should pay attention to the following aspects:

1. Maintenance of shaft seal

The packing shaft seal pump should regularly check the sealing water pressure and water volume, always keep a small amount of clean water flowing along the shaft, adjust the packing gland regularly, check the packing and replace the packing regularly, and the shaft seal water pressure, and the shaft seal water volume should meet the above (shaft seal). seal inspection) requirements.

The auxiliary impeller shaft seal pump with an oil cup should be filled with oil regularly to lubricate the internal packing or lip seal.

2. Adjustment of the impeller

To ensure the efficient operation of the pump, it is necessary to adjust the gap between the impeller and the front guard plate in time. The gap between the metal-lined pump impeller and the front guard plate is between 0.5-1mm, and the gap between the rubber-lined pump impeller and the front and rear sheaths should be equal. When adjusting the impeller clearance, first stop the pump, loosen the bolts that hold the bearing assembly, and screw the nuts on the adjustment bolts to move the bearing assembly forward. , for metal-lined pumps, loosen the nut just tightened by half a turn. Then tighten the front nut on the adjusting bolt to move the bearing assembly backward. At this time, the gap between the impeller and the front guard plate is between 0.5 and 1 mm. For the rubber-lined pump, screw the nut on the adjusting bolt to make the bearing assembly move first. Move forward to make the impeller contact the front sheath, and then move the bearing assembly backward to make the impeller contact the rear sheath, measure the total moving distance of the bearing assembly, take half of this distance as the gap between the impeller and the front and rear sheaths, and then adjust the position of the bearing assembly with the adjusting bolt to ensure the correct clearance value between the impeller and the front and rear sheaths. After adjustment, before restarting, it is necessary to re-check whether the impeller rotates normally, whether the bearing assembly pressing bolt and adjusting bolt are tightened, and then start the pump again.

3. Bearing lubrication

When the bearing assembly is assembled, if the assembly is correct, the lubricating oil is appropriate, and the maintenance is timely, the operating life will be longer. The maintenance personnel should regularly inspect the bearing assembly, check the condition of the bearing and grease, and the inspection interval is generally not more than 12 months. Grease must be added regularly during operation. The interval time and the amount of injection are related to many factors such as the speed of the pump, bearing specifications, continuous working time, the number of times the pump is stopped, the surrounding environment and operating temperature, and excessive grease will cause The bearing is hot, so it is necessary to gradually accumulate experience and add grease in a reasonable and timely manner. In general, please refer to the table below. 4. The spare pump should rotate the shaft 1/4 turn every week, so that the bearing can bear the static load and external vibration evenly.