fuyangby@126.com
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fuyangby@126.com
86 15188770013
The core of slurry pump debugging is the five step method of "preparation → inspection → no-load trial operation → load debugging → parameter monitoring". It is necessary to focus on ensuring correct steering, good sealing, and proper bearing lubrication, and observe whether the flow rate, pressure, vibration and other parameters are stable by gradually increasing the pressure.
As a key equipment for transporting slurry containing solid particles, slurry pumps are widely used in mining, power, metallurgy and other fields. Its working environment is harsh, and improper debugging can easily lead to problems such as shaft seal burning, bearing overheating, and cavitation damage. Therefore, a scientifically standardized debugging process is crucial for ensuring the long-term stable operation of equipment.
Debugging process and methods
1. Preparation before debugging
Technical data verification: Confirm that the pump model, parameters, and operating manual are complete; Collect historical maintenance records for comparison.
Equipment inspection:
Check that all fixed connection parts are not loose;
Confirm that the specifications and quantity of the lubricant meet the requirements of the technical documents (such as lithium based grease 2 # or 3 #);
Check the electrical system, instruments (pressure gauges, thermometers), and safety protection devices for sensitivity and reliability.
Pipeline system inspection:
The suction pipeline must be sealed without any air leakage;
Install barriers at the import to prevent blockage by large particles;
The outlet valve is closed, and the inlet is filled with water to drain the air.
2. Preliminary inspection and direction confirmation
Manual turning: Rotate the pump shaft gently and evenly without any jamming.
Motor steering verification:
Start the motor without connecting the pump body and confirm that the direction of rotation is consistent with the specified direction of the pump;
If reversed, swapping the wiring of any two phases of the power supply can correct it.
3. Start up and no-load trial operation
Start the motor and observe under no load:
Whether the pump runs smoothly and whether there are any abnormal sounds or vibrations;
Temperature rise of bearings (generally not exceeding 60-65 ° C, with a maximum not exceeding 75 ° C);
Is there any leakage at the sealing point.
This stage lasts for about 5-10 minutes, and after confirming that it is running normally, it enters load debugging.
4. Load debugging and parameter adjustment
Outlet valve opening: Slowly open the outlet valve to avoid instantaneous high load, control the starting current, and prevent motor overload
Flow regulation: According to the working conditions, the flow is controlled by a frequency converter or a regulating valve, with small fluctuations and meeting the process requirements
Pressure monitoring: observe changes in pressure gauge readings, actual head approaching design value
Packing compression: Tighten the packing gland nut evenly to allow the liquid to drip out, pay attention to temperature rise, and prevent leakage or overheating of the shaft seal
Sealing water supply: For pumps using mechanical seals, it is necessary to ensure a continuous supply of shaft sealing water, and it is strictly prohibited to operate without water, otherwise the sealing components will be burned
5. Evaluation of operational stability
During the debugging process, it is important to focus on monitoring the following indicators:
Vibration and noise: Use an accelerometer or stethoscope to detect, excessive vibration may be due to impeller imbalance or loose foundation
Temperature: If the temperature of the bearing and motor casing exceeds 75 ° C, it indicates poor heat dissipation or insufficient lubrication
Sealing performance: Is there any leakage? Severe leakage may be due to worn seals or improper installation
Energy efficiency performance: power consumption, energy efficiency ratio, high energy consumption indicates internal wear or deviation from high-efficiency zone operation
Ultrasonic and vibration methods can be used to determine whether cavitation has occurred, with the typical feature being damage to the honeycomb shaped metal surface.
Conclusion
The commissioning of slurry pump is a systematic project that must follow the principles of "static first, dynamic second; no-load first, load second; local first, overall second". The key to successful debugging lies in detail control, especially in steering confirmation, proper lubrication, sealed water supply, and progressive loading. After debugging is completed, a formal report should be filled out and archived for future maintenance and traceability.
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(Editor in charge: Slurry Pump https://www.fuyangpumps.com/)
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