Find the reasons for bearing damage during the operation of sludge transfer screw pumps
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Find out the reasons for bearing damage in sludge transfer screw pumps during operation; is it related to too low flow rate at the pump outlet or excessive pressure?
It’s probably due to an excessive load, in other words, it’s stuck.
Regularly inspect and replace components, and check the wear level of the vulnerable parts. Under such conditions, one cannot expect a pump pipe to last a lifetime.
This pathogen needs to be examined under a microscope. However, such damage shouldn’t happen; the motor’s basic overcurrent protection should have worked, it shouldn’t be the case. There should also be filtering facilities before feeding, right? It would be best to show a simple process diagram to see if it is related to the process design.
The design institute advises you: This should be a single-screw pump, and single-screw pumps are prone to bearing damage (due to their design). When bearing damage occurs and quality issues are ruled out, the cause is usually uneven stress. The high outlet pressure you mentioned can potentially lead to excessive axial force, thereby causing damage to the bearings. Low flow rate is not the reason; for this type of positive-displacement pump, the flow rate has little impact on it.
It could get damaged to such an extent that the rotor pushes the reducer so far away and the connection frames break; it’s very likely that the outlet valve was not opened when the pump was running, or it was opened only partially, or there was an obstruction in the outlet pipeline, which caused an increase in pressure in the discharge chamber and led to pump blockage. The connection frame between the reducer and the pump broke, and the motor continued to run; through the reducer, the pump rotor (screw) was rotated out, causing the reducer to shift axially along with the rotor.
Strictly follow the operating procedures to ensure safety, eliminate unsafe human behaviors and unsafe conditions of equipment, and implement proper safety management.