(Bonve Pumps Cam Rotor Pumps)

Mechanical wear is the most direct and core cause of abnormal noise. The failure of rotating components is generally the primary reason. As the core supporting component, once the bearing fails due to lubrication failure, contamination ingress, or fatigue damage, its rolling elements and raceways will produce a high-frequency "buzzing" or periodic "clicking" sound, accompanied by a temperature rise. If the pump shaft becomes bent due to overload or bearing failure, or if the shaft sleeve is worn, it will cause eccentric rotation of the rotor, generating a low-pitched, rhythmic "thumping" vibration and noise. Looseness of the impeller or damage to its vanes will disrupt the dynamic balance, leading to non-periodic impacts and vibrations throughout the pump body. Dry friction on mechanical seal faces or an overly tight packing gland may produce a sharp "squealing" sound.

Abnormal noise caused by fluid dynamic abnormalities has a more complex mechanism and is more destructive. The most representative is cavitation. When the suction pressure is insufficient, causing localized vaporization of the liquid and the formation of bubbles which subsequently implode in the high-pressure zone, it produces a dense "crackling" or "popping" sound, accompanied by a sharp drop in performance and erosive damage to the wetted parts. Air ingress (air binding) into the pump, due to leaks in the suction line or poor sealing, leads to unstable flow and produces intermittent "rumbling" or hollow sounds. Transient fluid shocks caused by improper system design (such as water hammer) can also trigger severe pipeline vibrations and noises.

Installation and alignment issues are secondary root causes that cannot be ignored. Misalignment between the pump and motor shaft systems generates periodic additional radial or axial forces, resulting in abnormal friction at the coupling and overall low-frequency vibration. Loose anchor bolts or insufficient foundation rigidity may induce resonance, amplifying inherent vibration noise. Furthermore, external stresses introduced by improper piping support, or foreign object ingress causing instant jamming or scraping within the pump chamber, can also produce significant abnormal sounds.

During diagnosis, the rotor pump should be treated as an integrated diagnostic unit. The primary step is correlation analysis: linking the characteristics of the abnormal noise (pitch, rhythm) with real-time operating parameters (pressure, flow rate, vibration values). For example, a high-frequency "buzzing" sound combined with bearing temperature rise strongly indicates bearing failure; intense "crackling" sounds coupled with performance decline are typical signs of cavitation. This should be followed by systematic troubleshooting, adhering to the principle of proceeding from external to internal and from simple to complex. First, rule out external factors such as misalignment, loose anchor bolts, and air ingress before delving into disassembly to inspect bearings, seals, and the impeller. Only through this rigorous process can the root cause of the fault be accurately identified, ensuring the long-term and stable operation of the equipment.

Bonve pump always adheres to the philosophy of "Wholeheartedly Making Good Rotor Pumps," committed to providing global customers with customized conveying and mixing solutions. If you have technical inquiries, selection needs, case references, or other cooperation intentions related to Bonve rotor pumps, please feel free to contact us.  

Service Hotline: 0574-87588986 13586591794  

Official Website: www.bvpumps.com  

Business Email: market@bonvepumps.com  

We look forward to working with you to drive efficiency and innovation in industrial fluid transmission with precision technology.