surge in multistage centrif blower?
surge in multistage centrif blower?
(OP)
I searched the forums but couldn't find any topics. I'm looking for information on surge as it occurs in multistage centrifugal blowers (room temperature air service). It's been suggested that because the blower curve has a saddle in its upper end (as opposed to continuously rising to shutoff), the unit may surge back and forth across the peak in the operating curve. Apparently this phenomonon can lead to physical damage to the rotating equipment.
My question is for a system that might be controlled by AFD (adjustable frequency drive), such that the unit moves up and down its performance curve in response to changing process demands.
Any real world experience? Printed references? Cautions? Advice? Thanks...
My question is for a system that might be controlled by AFD (adjustable frequency drive), such that the unit moves up and down its performance curve in response to changing process demands.
Any real world experience? Printed references? Cautions? Advice? Thanks...





RE: surge in multistage centrif blower?
RE: surge in multistage centrif blower?
I'll take this problem to my old hippie, bike building, banjo picking, cigar smoking, beer drinking buddy and talk to our engineering instructor and see what comes out.
Cheer up, it could be worse, it could be me trying to figure this out!!!
RE: surge in multistage centrif blower?
I'm wondering how close to the surge point (in psi) we can get, and curious if anyone's tuned a PLC control loop for such an application.
Feedback from fellow bike builders and beer drinkers, or others as well, greatly appreciated...
RE: surge in multistage centrif blower?