Cause Analysis and Solution of DG Multi-stage Centrifugal Pump (BFW Pump) Vibration and Abnormal Sound
The technical experts of Shenyang Pump Manufacture Co., Ltd. analyze the causes and solutions of vibration and abnormal sound of horizontal multi-stage centrifugal pump based on years of pump maintenance experience.
① When the vibration frequency of multi-stage pump is 0-40% of the working speed, cause analysis: damaged bearing or bearing bush, impurities in the conveyed medium, no lubrication for pump for a long time, excessive clearance between bearing or bearing bush;
Recommended solutions for Shenyang Water Pump: repair or replace the bearing or bearing bush, remove impurities in the medium and adjust the clearance between the bearing or bearing bush.
② When the pump vibration frequency is 40% - 100% of the working speed, the cause analysis: the mechanical seal is worn and the seal clearance is too large;
Recommended solutions for Shenyang water pump: adjust the seal clearance, and directly replace the seal in case of serious wear
③ When the vibration frequency of multi-stage pump is 2 times of the working speed, cause analysis: loose coupling, damaged bearing, bent shaft and deformed pump case;
Recommended solution for Shenyang Water Pump: adjust and replace the damaged parts.
④ When pump vibration frequency is very high, cause analysis: poor center alignment, pump casing deformation, sealing friction, support or foundation resonance, poor bearing or bearing bush shaking shrinkage fit, etc.
Solution suggested by Shenyang Water Pump: this situation has become very serious. Stop using the pump immediately and send it back to the manufacturer for professional evaluation and maintenance.
Shenyang Water Pump Manufacture Co., Ltd. welcomes your consultation!
