Hydraulic pump ?

[sawman34]

Hydraulic pump and cyl ?

Hello everyone , im a new. not very good with punctuation's and computers so please bear with me. my question is . my pump is a vickers vane pump ( v230 8 1c 12 ) just wondering what hp will run it, and will it be strong such as on a wood splitter or can i hook it up on a tractor engine or pto to run a back hoe attachment . or give me a good idea for a new project. And now i have another ?

 

[oldnslo]

This pump is obsolete by Vickers standards but to the best of my knowledge here are the specifications for it

8 GPM @ 1200 RPM

1800 RPM max operating speed

2000 PSI maximum pressure

right hand (clockwise) rotation as viewed looking at the drive shaft

 

[sawman34]

OK, thanks for that, next ? is i have a cyl its got a 2.5 shaft with a 7.5 cyl 32 inch stroke. im thinking of building another splitter. and what i want is a pump that i can get at maby surplus center im wanting one big enough to push wood through a six or eight way blade. and a gasoline engine recommendation for this setup. thanks

 

[Dave M7040]

Make certain you are appreciating the complexity of building a splitter.
You should have:
1. a two stage pump of at least 16 gpm to have reasonable cycle times.
2. A detent valve to return cylinder for next cycle without you holding the valve.
3. Motor of 270 c.c. or more.
4. mount for pump unto motor
5. coupling for pump to motor
6. filter designed for your hydraulic flow
7. reservoir to hold sufficient fluid to reject heat and not over heat
8. adequately sized hoses particularly suction hose.

Speaking from my experience, having a cylinder is the simplest part of the project.
Finding a used one or copying a commercial one would be most practical. Many people get into heating with wood but soon tire of it.

If your cylinder indeed has an internal diameter of 7.5" then by my calculations that is a piston area of 44 sq inches which at 2,000 psi is 88 tons of push or at 3,000 psi is 132 tons.
How are you ever going to hold that much force with a main beam? Most splitters work with 25 to 32 tons of push.
Good luck with your project.

Dave M7040
l

 

[sawman34]

I've always been in the business of one type of wood or the other , would like to build bigger than i have now .the cyl came off of a belly pan scraper , i think thats what there called. would need to know what is a good powerful pump + engine for a multi-pal wedge design such as a wood processer.

 

[LD1]

Gonna need a whole lot more than 16 gpm to have an acceptable cycle time. Gonna take about 23 seconds just to fully extend.

 

[4570Man]

You are going to need a big pump and a big motor. That is a pretty big cylinder. You may need to go with a low pressure pump to avoid breaking something. Are you sure it is a 7.5 inch bore?

 

[sawman34]

No , the outside is 7.5, I don't know what the inside is . I have a 353 detriot power unit off of a knucklboom with a huge commercial shearing pump mounted on the pto drive but I hate to listen to it. besides its just to much for what I want , so what are you guys recommending . I have go-devil power units and chevy six cyl.

 

[muddstopper]

Motor size is going to be determined by how much flow and pressure you need to obtain the speed and power you are looking for. Your 7.5in outside dia cyl is most likely a 6.5 or 7 in bore, or somewhere in that range. Without doing the math, You can get by with a lot less pressure than you would need if you had lets say a 4in bore cyl. and still have the same splitting force. It takes about 1hp to pump 1 gal of oil @1500psi. To get any decent cycle times out of your monster cyl, you are going to need around 50gpm of flow. 1500psi with a 7in bore cyl will give you about 29tons of splitting force. I split 6ways with about that much force on my splitter and it pretty much splits anything I throw at it. Given I wouldnt want any less force for what I split. Your 50gpm of oil at 1500psi is going to take about a 50hp engine to pull the pump. I dont know that I would even consider using that big of cyl for a splitter, even if it was free, simply because its going to cost the crap out of you to buy valves and hoses big enough to handle 50+gpm oil flows. You would be looking at a v70 series valve at a minimum just for a splitter vavle and that one part alone could cost as much as $1000, and we havent even started buying hoses and fittings. For that amount of money, you could purchase a new 28gpm 2stage pump, auto cycle valve and 5in bore cyl and power it with a old lawn mower engine. Using the smaller engine would save you a lot in fuel cost over buying fuel for a 50hp diesel engine. And the 5in bore cyl at 3000psi would have more splitting force than the big cyl at 1500psi. If you need the full force of you monster cyl and want to apply 3000psi to get it, you are going to need a 100hp engine to do so. This may not be what you want to hear, but I think its something you need to hear.

 

[LD1]

Hard to suggest anything without knowing what the cylinder is.

Sounds like a 6" possibly?

I'd want no less than a 28gpm if going 2-stage. Longer stroke makes for a slower cycle. But about 8.4sec out and 7 sec retract its better.

Single stage pumps never shift to a slower speed in Tough stuff, but require a bigger engine.

The size of the engine is going to depend on What pump you choose, and how much psi you want to pump. Which is going to be determined by how much tonnage you want.

Many ways to make a splitter. None really right or wrong. Bigger pumps are faster. But cost more and require bigger motor. Just depends on What YOU want and how much YOU want to spend.

 

[sawman34]

Thanks guys ,now were getting somewhere, i looked at a pump at nortern tool . says two stage concentric pump 28 gpm. i have a 18 hp engine ready to go. so im going to use the cyl on my other splitter its about a five inch on the outside diameter with a 2.5 shaft it works good but has the small typical 2 stage pump and a single splitter wedge also with a 18 hp . will this be enough for a six way wedge.

 

[muddstopper]

5in outside dia doesnt really tell you what the inside dia is, you can guess pretty close and i would guess you have a 4.5in cyl. your 28gpm pump is rated at 3000psi. I use a 5in cyl for 6way splits and dont even know what the pressure is set at, less than 3000psi I am sure, and it will split 6ways thru knots, or most any crotch I throw at it. I did stall it once in a 48in dia knotty white oak, but I backed it up and turned the log a little and it ran right thru it.

 

[LD1]

I would confirm what pump is on it.18hp it probably has a 22gpm already. Not what I would consider small. 18hp may struggle with 28gpm. And real speed increase won't be that noticable, and would probably require a larger valve also.

What is the capacity of the current tank?

As to 6-way working, depends on the wood you are splitting. You will always find something you can't split, regardless of how big you go

 

[LD1]

I didn't catch the 5" on The outside part. Yea, probably a 4.5" cylinder. Which is more typical to have a 16gpm pump and 8-10 HP motor. Why does it have an 18? Homemade?