Positioner for car dumper 2

[mte12]

Would anyone be familiar with positioners for car dumpers.

Is there a deflection or stiffness requirement for the foundation that you know of?

 

[FacEngrPE]

I would expect a required massive foundation for one of these rail car dumpers. Vendors for this sort of equipment are often willing to share information during the concept or design stage of a project,

https://youtu.be/Tkj06OfJI7s

 

[RolMec]

These positioners transmit a heavy horizontal force-couple into the rails, as well as their vertical g-forces. Requirements on positioning accuracy must be met. If drive is a rack & pinion, geared wheels-to-rack position requires sufficient stiffness.

Roland Heilmann

 

[mte12]

Thanks for advising.
Do you know if there is a dynamic requirement, as the ore cars act like a spring system, when all moved at once.

Is there any way you can quantify "sufficient stiffness". Is there a specification item that you've seen?

 

[dhengr]

Mte12:
The manufacturer of the dumper should give you foundation loads, design criteria, and general layout plans. The primary foundations and loads are at/near the two end rings visible your photo. The primary rotary drivers are usually large pinion gears driving large ring gears on those end rings. The mid-length of the dumper is a large hopper, conveyor and dust/water spray system and its associated foundations. The cars are automatically clamped/gagged down onto the rails, from above the top chord on the car sides so that they move very little w.r.t. the rails during the dumping cycle. This also prevents the trucks and truck parts, center plates, etc., from starting to fall apart, disengage from each other during the dumping operation. There are platens on each side of the dumper which limit the lateral motion of the cars. Some dumpers have longitudinal positioners which actually pull the train/railcar into position in the dumper, without motive power. Others use the motive power to pull the cars into position in the dumper before it is clamped down. Cars with rotary couplers can be dumped without uncoupling, and those without rotary couplers must be uncoupled before they dump or you twist the couplers out of the cars.