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1. After each acid resistant submersible pump unit is put into operation, the items recorded in the daily operation report should be filled in in time. In the case of computer management, the daily operation data of each high temperature resistant pump should be input into the computer storage system.
⒉ Pay attention to the abnormal noise and vibration of the unit. For example, when the corrosion-resistant centrifugal pump is in normal operation, the unit should be stable and the sound should be normal, continuous and uninterrupted. Abnormal noise and vibration are often precursors to centrifugal pump failure. In this case, stop immediately for inspection.
3. Pay attention to the unit bearing temperature and oil quantity inspection. The bearing temperature should generally not exceed the ambient temperature of 30~40, and the higher temperature should not exceed 75. If you don't have a thermometer, you can also touch it with your hands. As a rule of thumb, if you feel very hot, you should stop and check.
4. For the ball bearings with grease used in the new unit, the first oil change time is 80h~100h after the unit is running, and then every 2400h (using molybdenum disulfide lubricant, the time can be doubled). Every bearing lubricated with mechanical oil should be replaced every 240 hours, and the oil level should be between the two graduations on the oil gauge at all times. If it is not enough, make it up at any time.
5. The normal dripping degree of the stuffing box is generally controlled to drop drop by drop to form a discontinuous line, that is, 20~150 drops per minute. The amount of dripping can be controlled by loosening and tightening the packing gland. Be careful not to press on one side, so as not to wear the shaft sleeve and gland.
6. Regularly check the coupling and the anchor bolts on the unit. If any deviation or looseness is found, it should be corrected and tightened in time.
7. Pay attention to the change of the meter pointer. Under normal operation, the position of the gauge needle should be basically stable at a certain position. If the pointer of the instrument changes and jumps violently, the cause should be found out immediately. For example, if the vacuum gauge reading rises, it may be that the suction pipe is blocked or the water level of the water source is falling; the pressure gauge reading rises, it may be that the pressure water pipe orifice is blocked; The speed should be reduced, the impeller is blocked, etc. For the motor, pay attention to whether the reading on the ammeter exceeds the rated current of the motor. If the current is too large or too small, it should be stopped and checked in time.
8. If the large acid resistant submersible pump group adopts water-cooled bearings or circulating oil-cooled motors, the water and oil circuits should be kept unblocked. If the circulating cooling system fails, the pump should be stopped immediately for maintenance.
9. Pay attention to the change of the water level of the suction well. If the water level of the suction well is lower than the lower design water level, one or two units should be properly turned off to avoid cavitation and damage to the impeller. Generally speaking, urban sewage generally has less water from midnight to 8 in the morning, so special attention should be paid to it.
Generally speaking, the entire acid resistant submersible pump has been adjusted before leaving the factory. Within 6 months after the purchase of the corrosion-resistant pump, the unused corrosion-resistant centrifugal pump does not need to be disassembled and inspected. Just check for flexible rotation, rust, and oil injection.
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