General > General Technical Chat

Hot air rework station pumps - food for thought ?

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james_s:
I'm not a fan of universal motors, they're noisy and maintenance intensive. Personally if I were designing something like this, I think I'd look at a centrifugal compressor as used in automotive turbochargers, and drive it with a brushless motor. Some aircraft engines use centrifugal compressors, many early jet engines did but you see them in more modern turboshaft and turboprop engines too. They look similar to a centrifugal fan but have a somewhat different operating principal.

wraper:
Quick does not use usual centrifugal fan, it's quite a bit different. Also it operates at high RPM. IIRC BLDC motor in 861DS/DW is rated for 28k or 25k RPM.




wraper:
Seems that older quick used two stage turbine.

ace1903:
Since caption is food for thought , I am wondering if bottle of nitrogen with pressure regulator can be used instead of blower?
It is bulky but it should be cheap and noiseless.  Flow metering and regulation tools are already on the market.
One bottle will not last long at 500l/min but in daily jobs probably 10l/min is more than enough.

james_s:
CPAP machines use similar blowers. I took apart an older one and found it had a centrifugal compressor driven by a BLDC motor. I don't know what speed it runs but it was in rubber mounts and was very quiet since it's designed to be used while sleeping.

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