1. Electrical above
Before using a submersible pump, it's important to double-check the operating voltage and direct current requirements. Using a water pressure meter, you can measure the voltage to ensure it's between 340 and 420V and that it's uniform across all three phases. Using a clamp-type direct current meter, you should measure direct current which should also be uniform and at 0.5 to 1 times the extra direct current. These simple checks can help ensure your submersible pump functions optimally and is safe to operate.
(2) Regularly review the thermal insulation resistance of the submersible pump to the ground. After the abnormality runs for 4~6h successively, stop and measure the insulation resistance of the motor winding to ground with a megohmmeter, which should be >Before using submersible pumps that have been stopped for a short period of time, it is important to review their status. This includes checking the resistance, which should be around 0.5MΩ. This precautionary measure ensures the safe and efficient use of the pumps.
Make sure to verify that the thermal repeater sensitivity is functioning properly and check for any abnormalities in the operation of other protective measures before turning on the machine. It is important to ensure that all safety precautions are in place before proceeding with any operation.
Make sure to inspect the cable for any signs of damage. It is particularly important to be cautious of the impact of oil seepage from the electric pump on the rubber insulation of the cable when dealing with oil-immersed submersible pumps.
2. mechanically
(2) Prioritize the examination of the submersible pump's mechanical seal condition. It is crucial to unscrew the oil hole and release a significant amount of oil for analysis. The presence of moisture in the oil indicates potential water seepage in either the upper or lower grinding block of the seal. In such cases, it is essential to replace the sealing box promptly and drain out the old freezing oil. Conversely, if the oil level is low or the oil quality is subpar, it is necessary to refill it with suitable options such as No. 5 or No. 10 mechanical oil, sewing oil, or transformer oil. In more severe scenarios, a complete oil replacement might be warranted.
(2) For the new or replaced submersible pump, the water sealing plug should be turned off after 50 hours of use, and the amount of oil (water) leaked should be checked. If it is less than 5ml, the seal is abnormal. If it can be used continuously, if it is more than 5ml, the oil (Water) After draining, tighten the sealing plug, and make a second inspection after 50 hours of continuous use. If it is still >If your submersible pump is showing the code 5m1, it's an indication that there's a problem with the sealing. To prevent any potential issues, it's recommended that you check the amount of leakage once a month. Your submersible pump should ideally have a leakage of less than 25ml, and it can be safely used after it has been dried out. It's important to keep a keen eye on the leakage levels to avoid any potential mishaps.
(3) Let's evaluate the vibration condition of the pump motor based on its operating speed. The motor's synchronous speed can vary, ranging from 3000r/min to 750r/min. Corresponding to each speed, we have specific vibration values, where δ represents the vibration amplitude. For example, at a synchronous speed of 3000r/min, the vibration value should not exceed 0.06mm. Similarly, at 1500r/min, the acceptable limit is 0.1mm. As we decrease the speed to 1000r/min, the maximum allowed vibration rises slightly to 0.13mm. Finally, at 750r/min, the vibration value must not surpass 0.16mm. It is crucial to monitor these vibration levels to ensure the pump motor's optimal functioning.
It is important to regularly assess the condition of the submersible pump's bearings. This involves checking for any oil shortage, as well as determining whether the bearing is running on the inner or outer ring. Additionally, it is crucial to evaluate if the bearing requires replacement. It is worth noting that water-filled electric pumps typically necessitate bearing replacement once a year.
3. rest above
(2) It's crucial to inspect the submersible pump's inlet mesh cover for any obstructions caused by weeds and dirt, as well as checking if the impeller is tangled or not. It's best to do this regularly to prevent any potential damages or malfunctions.
For a brief period of time, it is recommended to raise the submersible pumps to the surface of the port. Afterward, they should be washed, dried, and stored in an upright position in a well-ventilated and dry room.
In order to maintain the robust performance of your QJ series submersible electric pump, it is essential to carry out regular checks and cleaning of the motor. It is recommended to do this every 1 to 2 years, and use the core pulling method for cleaning purposes. If there is any contamination present, it is advisable to immerse the motor in a solution of 0.2% Haiou TX-10 or 105 soap powder, and heat it to about 100°C for an effective cleaning process. Stir the liquid to ensure slow melting of the contamination. After 1 to 2 hours, use low-pressure tap water to develop Pickled Zangjia for cleaning the water droplets. Lastly, dry the motor by placing it in an oven at high temperature. These steps will ensure your QJ series submersible electric pump continues to operate smoothly and efficiently.