torsional vibration
torsional vibration
(OP)
Do the springs arrangedd radially around a clutch plate absorb or deturn torsional harmonic vibrations?
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RE: torsional vibration
If you can make the travel long enough they can be made to isolate the driveline from TVs down to 80 Hz, but this is tricky. Another approach is to use a dual mass flywheel which allows you to put a low pass filter into the system.
Strictly speaking they detune the system - springs can't 'absorb' energy, as such, although they can certainly reduce the amplitudes of modes.
Cheers
Greg Locock
RE: torsional vibration
RE: torsional vibration
What's a TV; and, what's a dual-mass flywheel and a low-pass filer, and how is it inserted into the driveline? Are we talking mechanical driveliness here?
Terr
RE: torsional vibration
Cheers
Greg Locock
RE: torsional vibration
Eighty Hz is still 2400 pulses per minute....
1. I'm working with an 8-cyl 4-cycle input,and the idle speed about 600-rpm... that's 2400... so how do I figure how much spring I need? Or if that's too critical, can I buy a dual mass flywheel somewhere? (351-cu.in)
2. I'm also working on a problem with a 28-cyl 4-cycle engine, and wondered if it can be detuned with a simple spring plate. It drives through a 6-in. dia shaft, to a contra-rotating dual 4-blade prop, reduced to .381. Would it need a dual mass flywheel too, or could a spring plate detune it?
RE: torsional vibration
2 Oh just the 28 cylinders is it? Sorry, way out of my experience, but given that you are talking about an expensive installation I would call in an expert. In England I'd talk to Holzer (spelling?).
Cheers
Greg Locock
RE: torsional vibration
Thaks again. T.
RE: torsional vibration
Big drawback was of course the hugely increased mass of the flywheel, unacceptable to some sporting types!
RE: torsional vibration
Duh!
RE: torsional vibration
My boss at Lotus had a fixation with dual mass flywheels, shared by many NVHers at the time.
Cheers
Greg Locock