Hoffman Amplifiers Tube Amplifier Forum
Other Stuff => Other Topics => Topic started by: shooter on July 23, 2021, 05:57:33 pm
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I have a 22Ton log splitter, 2 stage gear pump. 8HP drive engine@2,000-4,000RPM
IF I have unlimited HP available to drive the pump but the RPMs are ½ original design,
things will take longer, guessing heat will rise, but is overall PSI (22Ton capability) effected?
Thanks
dave
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Need a schematic to answer the question. See Doug's extensive collection . . .
Just kidding. :icon_biggrin:
If you're turning the pump at 1/2 speed, it will just take longer to get to pressure. I don't think heat (in the hydraulics) will change.
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A healthy gear-pump working against an unsplittable log will build infinite pressure. Or burst a hose, a valve, or just leak in the gear-teeth. While hydraulics can be wired open or close loop, IAC there is a pressure blow-off.
Typical older systems could run 2,000psi (blow-off set like 2,050psi). This does not change with infinite power, or lower RPM, just takes longer.
22 tons, 44,000 pounds, at 2,000psi, implies 22 square inch piston, or 5.28" bore. Ah, 22T uses a common 4" piston so must be pumped-up to 3,500psi... normally a higher-cost hose but there is so little hose on a splitter (and so little runtime compared to like a timber forwarder) that I guess it makes sense to use the tough hose and smaller cylinder.
Of course if you have infinite horsepower, YouTube is full of videos of flailing flywheels which will split a log WHAM. No oil.
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Thanks;
i want to operate within design specs, operational and safety. I just want to have drive options
The lines seem to be quality built. I've had more than my share of blown lines. One of the Philips MRI tables used hydraulics at @3000psi
It don't take long to turn a floor into a skate rink!!!