securing leads and components on rotating machinery
securing leads and components on rotating machinery
(OP)
Is there a good reference containing guidelines for securing wiring and components on rotating machinery.
We make an 1800 rpm device with a lot of boards, leads, connectors, capacitors, etc. We've spotted some problems by watching the device at speed with a strobe light, but I'm hoping there is a MIL spec or something that spells out some good rules of thumb and examples.
Thanks,
Dan Timberlake
We make an 1800 rpm device with a lot of boards, leads, connectors, capacitors, etc. We've spotted some problems by watching the device at speed with a strobe light, but I'm hoping there is a MIL spec or something that spells out some good rules of thumb and examples.
Thanks,
Dan Timberlake





RE: securing leads and components on rotating machinery
Just one of many on-line RPM-G calculators:
http:/
G-force goes up as the square of the RPM and in proportion to radius.
High hundreds, or a thousand, G is a lot. Rim speed for the example is about 187 kmh or 116 mph.
Suggestion: If you haven't already, install an unbreakable plastic shield before someone loses an eye. Especially if various components and hardware are flying out at random intervals. Red tag the power switch if you haven't conducted a safety study.
If this RPM is an operational requirement for the system, then it should have been identified as a significant issue at the outset. Similar to, "Oh by the way, the entire Command and Control System needs to fit through a 4-inch inside diameter pipe..."
Epoxy potting is probably going to be required all over the place. Then you'll have to rebalance. Structural analysis of the major components: PCBs and everything.
Standby in case anyone has actual hands-on experiance at these levels and better hints.
Yikes.
RE: securing leads and components on rotating machinery
We are designing and making it, and the electronics group comes up with their own specs and is mighty "independent".
RE: securing leads and components on rotating machinery
It is a tough environment - we see casualties quite frequently, and it seems to be inherent in the application. Any chance you could get the assembly closer to the shaft centreline? That would be the best way of reducing the forces on the components.
Perhaps the military avionics guys might have some more ideas?
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I don't suffer from insanity. I enjoy it...
RE: securing leads and components on rotating machinery
RE: securing leads and components on rotating machinery
High speed watercraft experience up to about 100 g's but extremely short durations. Nonetheless, the most frequently broken item in our system was a load bearing.
TTFN
RE: securing leads and components on rotating machinery