Dolly for vibrating machine 1

[zpiderman]

I need to design a dolly (or support frame) for a vibrating screener. This dolly will be suspended on a track about 6 feet above the floor. Since I don't have much experience with vibration, what should I keep in mind when designing this dolly?

Any information would be appreciated.

 

[Hatch]

In 98% of the cases I have seen, designing the dolly or support frame strong enough to support the static loads is sufficient.

However, in the other 2% of cases, structural resonances are a major problem.

A typical screen may run at frequencies between 7 and 30 Hertz. However, building and structural resonances can be in the range 0.1 to 15 Hertz. If your screen operating frequency matches the building or structural natural frequency, look out. I have seen displacements of 4 inches on startup.

Therefore after the design of your frame, use software to estimate the natural frequency of the system and make sure it is far enough away from the screen operating frequency. C. Hugh (

http://www.Hatch.ca)