The cause of the fracture of the slurry pump pump shaft and its solution
In view of the problem of broken shafts occurring in the slurry pump, the Tiangong Pump Industry has reviewed the shaft on the basis of field data collection, and viewed the cross-sectional shape and break marks as alternating stress. The broken shaft of the slurry pump is mostly due to fatigue fracture caused by repeated alternating stress. It is manifested in the operation that the pump is in a small flow area for a long period of time. When the operating flow deviates from the design flow, radial forces acting on the impeller are generated, causing the shaft to undergo alternating stress and producing a directional deflection. Through practice, it is known that the axial force is small when the actual delivery volume is equal to the design flow rate. Slurry pump shaft is subject to this alternating stress for a long time, and it accumulates to a certain extent, resulting in failure of shaft section, and thus shaft fracture occurs.
Solution: In order to greatly extend the smooth operation period of the slurry pump, it is recommended to shorten the cleaning pipeline fouling cycle, from 2 months to 1 month. In this way, the operating point of the slurry pump can be brought close to the design point to a great extent, thereby reducing fatigue damage and extending the safe operation time of the pump shaft.
Shijiazhuang Tiangong Pump Industry Co., Ltd., with its good reputation and quality, has been actively forging ahead , focusing on customer needs, ensuring perfect pre-sale and after-sales services, and continuously developing and innovating. Tiangong Pump Co., Ltd. takes "national rejuvenation" as its responsibility and "repays society" as its glory. With the noble concept of "moisturizing the world", it strives for continuous improvement and self-improvement. - Willing to work together to create brilliant!
