What are the consequences of long-term pumping under vacuum with a mechanical pump?
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This post was last edited by subway123 on 2011-12-26 at 19:56. Besides having a significant impact on the mechanical seals, what other consequences can arise from the prolonged operation of pumps in oil refineries? Please explain in detail.
Performance declines, flow rate is insufficient, and head pressure decreases. High noise and vibration can easily damage the bearings, reducing their lifespan ； In severe cases, it can cause scraping of the mouth ring or even locking. The blades are subject to cavitation corrosion; in severe cases, pitting and honeycombing occur, and eventually the corrosion penetrates through them. The pump casing can also be corroded due to cavitation.
What was said upstairs is quite detailed; to add something more: prolonged exposure to such conditions can also cause damage to the mechanical seal, leading to leaks, and may even result in bending of the pump shaft, which is long and thin.
There are unusual noises at the scene； The pump body and bearing housing experience high vibration, and the bearings wear out quickly ； The mechanical seals and bearings have a short lifespan and require frequent maintenance
It could cause a fire in the event of a leak, so this is something that cannot be ignored……
Prolonged vacuum pumping by the pump leads to a decline in its performance, seal leakage, detachment of the impeller locking nut, and damage to the impeller.