Can someone explain where the clatter noise on a diesel engines comes from? I always thought it was from the injection pump(hydraulic noise). I believe the newer trucks have electronic injection and the noise is still there.
I have noticed sidebanding around turning speed and it's harmonics with peakvue. On 1800 rpm equipment the sidebanding is around 3Hz. On 3600 rpm equipment the sidebanding is around 5 Hz. I see this on motors, pumps, fans etc. It is not cage or slip pole. Any suggestions would be appreciated? I...
Can any one explain how a harmonic dampener on a V8 works? Is it tuned to the natural frequency of the crankshaft? Does it dampen the torsional twist of the crank from the power pulses? Why does one dampener work for cast/steel cranks? How can sprint car motors run with out one? Thanks!
I have CSI 2120 vibration equipment. A customer wants to know if I can take torsional vibration data on their Walkasha deisel engine. Can any one tell me what he is looking for and can this be done with an acellerometer and tach?
I have a V12 Waukesha diesel driving a (60HZ) 1050KW Leroy Somer generator at 1200 RPM. The generator has one bearing on the outboard and none on the inboard. The inboard is directly coupled to the crankshaft/coupling. The vibration over all levels are around .3 IPS at each point on the engine...
