The catalytic diesel pump experiences high vibration
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In a 1.4 million-unit catalytic cracking unit, after the Cuichai A pump was in operation for some time, the pump body and the associated pipelines experienced significant vibration. The pump was switched off to clean its filters; there wasn’t much debris present, but there was rust. After cleaning, the pump was put back into use, only for vibration to occur again shortly thereafter. Pump A is a fixed-frequency pump, while pump B is a variable-frequency pump, and pump B has never experienced any vibration issues. I’m seeking information from those who have encountered similar problems and their solutions
Disassemble the pump to check the wear condition of the impeller and whether it is damaged, then consider the issue of alignment between the motor and the pump
1. Check whether there is a significant change in diesel flow rate to rule out the possibility of cavitation； 2. Check for issues with the pump itself ； 3. If such problems occur after the unit has been running for some time, check whether the supports of the inlet and outlet pipelines of the pump, or other connections, are causing stress due to heat, which in turn leads to vibration of the pump!