2Associate Professor, Faculty of Mechanical and Material Engineering, Graduate University of Advanced Technology, Kerman, Iran.
3Associate Professor, Faculty of Mechanical and Material Engineering, Graduate University of Advanced Technology, Kerman, Iran
4Condition Monitoring and Fault Diagnosis Manager, Condition Monitoring Department, Pishro Sanat Danesh Faraz Company, Kerman, Iran.
5Research & Development Engineer, Research & Development Department, Sarcheshmeh Copper Complex, Kerman, Iran.
چکیده
High-pressure multistage centrifugal pumps are among the widely used equipment in various industries, efficiently transporting fluids over long distances or through systems with substantial pressure differentials. Due to their crucial role, it is imperative that regular condition monitoring be performed. Condition monitoring involves various methodologies, one of which is vibration condition monitoring. After vibration condition monitoring of the 7-stage centrifugal pump at the Khatun Abad copper complex, remarkably high levels of vertical and horizontal vibration amplitudes of the bearings were observed. Hence, this study aims at the fault diagnosis for the multi-stage centrifugal pump at the Khatun Abad copper complex using vibration analysis. To achieve this end, data collection was performed using a vibrometer and accelerometer vibration probe, subsequently followed by a thorough examination of the results. Examining the vibration frequency spectrum within the bearings revealed the dominance of particular harmonics, distinguished by varying amplitudes across different directional components. Therefore, a thorough examination of the fault's underlying cause was conducted, taking into account both hydrodynamic and mechanical aspects. The deduction was made that the leading mechanical factor contributing to the observed vibrations is the damage or corrosion to the impeller or diffuser, resulting in an asymmetrical condition. Additionally, blockage of diffuser passages and wear ring clearance issues could also be other reasons for the mentioned vibration. Ultimately, some recommendations are proposed to address these challenges and ensure the continued optimal performance of the multi-stage centrifugal pump.
.Vibration Analysis for Fault Diagnosis in Multi-Stage Centrifugal Pumps: A Case Study at Khatun Abad Copper Complex
Authors
Abstract
High-pressure multistage centrifugal pumps are among the widely used equipment in various industries, efficiently transporting fluids over long distances or through systems with substantial pressure differentials. Due to their crucial role, it is imperative that regular condition monitoring be performed. Condition monitoring involves various methodologies, one of which is vibration condition monitoring. After vibration condition monitoring of the 7-stage centrifugal pump at the Khatun Abad copper complex, remarkably high levels of vertical and horizontal vibration amplitudes of the bearings were observed. Hence, this study aims at the fault diagnosis for the multi-stage centrifugal pump at the Khatun Abad copper complex using vibration analysis. To achieve this end, data collection was performed using a vibrometer and accelerometer vibration probe, subsequently followed by a thorough examination of the results. Examining the vibration frequency spectrum within the bearings revealed the dominance of particular harmonics, distinguished by varying amplitudes across different directional components. Therefore, a thorough examination of the fault's underlying cause was conducted, taking into account both hydrodynamic and mechanical aspects. The deduction was made that the leading mechanical factor contributing to the observed vibrations is the damage or corrosion to the impeller or diffuser, resulting in an asymmetrical condition. Additionally, blockage of diffuser passages and wear ring clearance issues could also be other reasons for the mentioned vibration. Ultimately, some recommendations are proposed to address these challenges and ensure the continued optimal performance of the multi-stage centrifugal pump.
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