Correct application of self suction centrifugal oil pump and measures for dealing with cavitation faults

[1] The correct application of self suction centrifugal oil pump

In the use of self suction centrifugal oil pump, it is necessary to pay attention to the correct handling of the running in period. The correct use of self suction centrifugal oil pump based on the data of the running in period can improve its working life.

In theory, the wear law of self suction centrifugal oil pumps can be attributed to the general mechanical wear law, which includes the running in wear period, normal wear period, and intensified wear period. According to the operation law of the self suction centrifugal oil pump, the wear rate is relatively fast during the running in and wear period of the self suction centrifugal oil pump. As a brand new self suction centrifugal oil pump has just started working, during this period, the rolling elements of the bearings, raceways, support frames, etc. of the self suction centrifugal oil pump will leave defects such as burrs, cutting or grinding marks on the secondary machining surface. In addition, there will be slight positional deviations during the assembly process, leading to accelerated wear. During the entire running in period of the self suction centrifugal oil pump, attention should be paid to its correct use, and maintenance and upkeep should be carried out by utilizing and coordinating the wear characteristics of each stage. During the running in and wear period, the new self priming centrifugal oil pump should stop running after nearly fifteen hours of use, drain the lubricating oil from the bottom side of the oil chamber while maintaining the oil temperature, and clean the inner chamber of the self priming centrifugal oil pump with new lubricating oil. Initially, use debris and other debris from the running in process, readjust the fitting clearance of the friction generating area, and carry out some mechanical operations, adjustments, and work. Then, inject new oil and start working again. Regular supervision and inspection should be carried out during the normal and intensified wear periods to ensure the lubrication of the oil quality and the absence of any debris that may affect the normal operation of the machinery. This can extend the service life of the self priming centrifugal oil pump

[II] Measures for Dealing with Cavitation Faults in Self suction Centrifugal Pumps

The phenomenon of cavitation in self suction centrifugal pumps is a serious fault that affects the normal operation of self suction centrifugal pumps. It is necessary to reasonably judge the phenomenon that occurs after cavitation occurs in self suction centrifugal pumps, take better treatment measures, and remove the cavitation fault before they can operate.

. When the temperature of the fluid in a self suction centrifugal pump is too high, a large amount of gas remains in the air of the pump, causing the liquid inside the pump to vaporize and impact the impeller, resulting in serious damage to the impeller and inability to properly suck in and discharge liquid

If the liquid level of the self suction centrifugal pump is too low, the temperature of the liquid entering the self suction centrifugal pump is too high, and the pipeline at the inlet of the self suction centrifugal pump is blocked, causing excessive vibration of the self suction centrifugal pump. In severe cases, no liquid is discharged and abnormal noise is emitted. After analysis and judgment, it was determined that cavitation occurred in the self suction centrifugal pump. Through venting design, the phenomenon of cavitation can be solved in order to restore the normal operation of the self suction centrifugal pump unit, restore the normal input and output conditions of the self suction centrifugal pump, and achieve the designed production capacity