Slightly OT -- hydraulics for a log splitter

On Tue, 15 Feb 2005 03:02:28 GMT, snipped-for-privacy@hotmail.com (Roy) vaguely proposed a theory ......and in reply I say!:

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Is this something to do witht eh two-stage pumps? Hydro pumps should deliver constant flow, at any pressure

On Mon, 14 Feb 2005 19:39:39 -0500, "Andrew H. Wakefield" vaguely proposed a theory ......and in reply I say!:

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Two stage pumps sort of shift gears, so to speak, in that when they reach a predetermined pressure, due to load imparted on the log for instance, they drop in GPM but go up in pressure, and remain at higher pressure and lower flow until resistence drops, then pump cycles back to a higher flow rate with lower pressures, sort of like a automatic tranny downshifting.........its all done by the settings made internally in the pump.

They allow a smaller HP motor to be used in a lot of cases to provide the same rating, and saves a lot of wear and tear on hydraulics in general.

REMEMBER: "This is worth repeating for benefit of al newbies! Jo Ann asked Dr. Solo to remind people that while she has retired from selling GF (and sold the business to Ken Fischer

she has NOT retired from helping people with sick GF and koi FOR FREE. 251-649-4790 phoning is best for diagnosis. but, can try email put "help sick fish" in subject. Get your fish at Dandy Orandas Dandy Orandas Dandy Orandas........you guys got that DANDY ORANDAS

On Wed, 16 Feb 2005 19:54:53 -0800, "Lane" vaguely proposed a theory ......and in reply I say!:

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But have you seen the _prices_ of those things?

The 24 tonne one is US$4500, where I looked!

That's a lot of time needs to be saved to make up over hydraulics at maybe $1500.

On Wed, 16 Feb 2005 21:56:10 -0500, "Andrew H. Wakefield" vaguely proposed a theory ......and in reply I say!:

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If you are interested in the Super Split and what it takes to build one

On Thu, 17 Feb 2005 12:43:29 GMT, snipped-for-privacy@hotmail.com (Kerry) vaguely proposed a theory ......and in reply I say!:

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OK. Thanks. I had not dealt with them or heard of them. When you said "higher pressure means lower flow" I was thinking "Wha?...." but I live and learn.

Interesting, actually, why do hydraulic system not use springs to retract the cylinder just as the Rack and pinion ones do?

REMEMBER: "This is worth repeating for benefit of al newbies! Jo Ann asked Dr. Solo to remind people that while she has retired from selling GF (and sold the business to Ken Fischer

she has NOT retired from helping people with sick GF and koi FOR FREE. 251-649-4790 phoning is best for diagnosis. but, can try email put "help sick fish" in subject. Get your fish at Dandy Orandas Dandy Orandas Dandy Orandas........you guys got that DANDY ORANDAS

I have one of these spring return cylinders that I need to find seals for. Its from a 10 ton bench top (big bench!) Italian made press (VTA?) I scounged up last week.

The vietnamese workers took it apart..and I dont think they put all the parts in the coffee can....

Gunner

Rule #35 "That which does not kill you, has made a huge tactical error"

On Fri, 18 Feb 2005 01:54:45 GMT, snipped-for-privacy@hotmail.com (Roy) vaguely proposed a theory ......and in reply I say!:

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Yep. Got them in many applications.

Can't see why, if the spring is strong and the fluid passage easy. You may well be right, as it's not being done, btu it seems strange.

Yeah.... kinda like what they did to our swifts and UH-1s when we turned 'em over.

LLoyd

Sigh..so Ive heard

Gunner

Rule #35 "That which does not kill you, has made a huge tactical error"