Multiple hydraulic motors
Multiple hydraulic motors
(OP)
What is the consensus on driving hydraulic motors from one source? I have to design a system to drive 5 material screws at approximately 60rpm/3hp. Unfortunately space restrictions do not allow for a single point drive plus the augers have to be moved out of position fairly frequently and I don't believe the group would stand the handling. I am having problems with designing using flow dividers because of the odd number and the wasted energy, a rotary would work but the possibility of pressure intensification if a drive pin would shear has it's drawbacks to. I am almost thinking of individual circuits that would be driven from a gang pump with individual valving. I know the cost aspect but the benefit of being able to drop one screw out of service if a problem arises has its attraction. Or Five individual motor/pump/valve combos is also a possibility. Any other ideas?





RE: Multiple hydraulic motors
Five gear pumps stacked on one shaft.
Mike Halloran
Pembroke Pines, FL, USA
RE: Multiple hydraulic motors
Pressure intensification can be handled with pressure relief valves on the motor side of the gear splitters.
Ted
RE: Multiple hydraulic motors
Some rotary dividers (Haldex Barnes for sure, and I think Parker) have relief valves built in to prvent intensification. Each section has a RV cartridge from output to inlet.
That said, I'd go with separate stacked pumps somehow. Less interaction of pressures, espeically if you are trying to control loads or close the loop in some way.
RE: Multiple hydraulic motors
RE: Multiple hydraulic motors
Just make sure that each motor has its case drain going back to tank, instead of downstream.
As for how to run them together, you could integrate a check valve on the downstream side of each motor and put a 2-position, 3-way valve on the pressure side of each motor and connect it to the downstream side of the check valve and voila -- you can turn a knob and pull a motor out of service.
Engineering is not the science behind building. It is the science behind not building.
RE: Multiple hydraulic motors
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