How to build a hydraulic system for 20 ton log splitter

[LD1]

And 2-stage pumps arent good for hydraulic motors (or so I have heard). And if the pump that powers the cylinder for a splitter is going to be the same pump for a motor, now you are talking a 15-20GPM SINGLE stage. and that requires some serious HP.

 

[chandra007]

Hi,

I got some idea to build a log splitter.I am interesting to attach saw to my log splitter,

i need a hydraulic motor to to run the saw?,if yes what capacity hydraulic motor is require,how to split flow for hydraulic cylinder and hydraulic motor.

whether engine capacity is required to improve?extra valves are required?

i have increase pump flow?

please give some idea.

thanks in advance.

chandra

 

[chandra007]

Hi,

I am still waiting for your inputs.

I am interesting to know"how to attach hydraulic motor my existing circuit,if i run a saw along with log splitter".

when i am using saw cutter,flow should exists for that.when i am using log splitter ,the saw must be idle,for that what type of hydraulic arrangement is needed.?

it should be some thing like this.

http://www.youtube.com/watch?v=0gdo7WfB90s

what calculations are needed for hydraulic motor input power and out put power?

Thanks in advance

chandra007

 

[LD1]

I am not sure but I think that sawblade is driven off the motor and not hydraulics.

I dont really know the calculations you are asking for. But IF you want a hydraulic powered saw blade, you are going to have to either used TWO pumps (a 2-stage for the splitter and a single for the saw)

OR you are going to have to only use a single stage. And using a single stage is going to do one of the two following: 1. Make you have a slow splitter. 2. Make you have to run a larger motor. Like something in the ~20-25HP range for a decient cycle time on the splitter.

Directing flow is all in the valving.

I really dont want to discourage you or anything, but it sounds like you are trying to bite off more than you can chew without a sound understanding of hydraulics.

Maybe others will offer more advise, but this is as far as I want to go. I have never built a processor. So the exact things you are looking for I cant help with.

 

[J_J]

You need to do some more homework, and figure out the size blade on the saw, and the rpm for that blade and the size of hyd motor to turn the blade and how many GPM will make it work like you want.

You need hyd flow to the log splitter valve and to the hyd motor. A motor spool valve should run the hyd motor.

One valve should have PB to feed hyd flow to the other valve. Both valves can go in series, as you will using either the saw or the splitter. If you try and use both valves, the first valve will have priority.

For the pump, you need to compute the total GPM needed for both operations.

Then you need to compute the HP necessary to run the pump.

 

[chandra007]

Thanks for your reply. J_J & LD1,

As i am new in the field of hydraulics,i am getting more doubts.

at present i am going through the formulas and understanding the relation between Engine HP,Pressure,flow,RPM ,displacement and torque.

I am trying to use these formulas for real time applications.

J_J sir is giving some idea,how to link formulas with real time applications.I am going through his post,they are more useful.



chandra

 

[J_J]

Where is Chennai located?

 

[chandra007]

Where is Chennai located?

J_J sir,

chennai located in the south India,comes under the state of tamilnadu.

chennai

 

[bcp]

Chennai, India (formerly Madras, renamed in 1996)

 

[chandra007]

Dear all,

i have problem to approach for a problem.

If a hydraulic system is having 1000 psi pressure and the system contains a hydraulic motor to turn a 10 in radius drum at 30 rpm to lift a 1000 lb weight.
How to find out the gpm required by the motor to lift the weight?
torque delivered by the motor?

Chandra007