Firewood processor project.

[Ivan49]

If you put that pump on a gear box and if it is geared right you can run your tractor at a lower RPM and still get 540 RPM. What GPM pump do you plan on using

 

[Millet]

I don't know yet, I have not selected all my actuator. When I will know I will add the total of the actuator that run in the same time and
choose accordingly. Ex: at the same time -chainsaw motor 20 gpm + splitting log convoyer 15 gpm= 35 gpm continuous

I intend to use two hydraulic pump. I saw someone using 2 pumps. one for all the cylinders and the other one for all the motors.
Do you think there is a reason to divide the actuator on 2 circuits in such way?

I have a question about the splitting cylinder. Do you know what size of cylinder should I get
to split mainly 16 inch, but sometime maybe 18 or 20 inch? What should the stroke length be? the length of the log + 4, 5, or 6 inch or more?

 

[Ivan49]

I don't know yet, I have not selected all my actuator. When I will know I will add the total of the actuator that run in the same time and
choose accordingly. Ex: at the same time -chainsaw motor 20 gpm + splitting log convoyer 15 gpm= 35 gpm continuous

I intend to use two hydraulic pump. I saw someone using 2 pumps. one for all the cylinders and the other one for all the motors.
Do you think there is a reason to divide the actuator on 2 circuits in such way?

I have a question about the splitting cylinder. Do you know what size of cylinder should I get
to split mainly 16 inch, but sometime maybe 18 or 20 inch? What should the stroke length be? the length of the log + 4, 5, or 6 inch or more?

I used a 5 X 24 inch stroke cyl but for my use a 4 X 24 would work. My thinking was go bigger while you are building it as it is easer to do now than later

 

[polemidis]

I don't know yet, I have not selected all my actuator. When I will know I will add the total of the actuator that run in the same time and
choose accordingly. Ex: at the same time -chainsaw motor 20 gpm + splitting log convoyer 15 gpm= 35 gpm continuous

I intend to use two hydraulic pump. I saw someone using 2 pumps. one for all the cylinders and the other one for all the motors.
Do you think there is a reason to divide the actuator on 2 circuits in such way?

I have a question about the splitting cylinder. Do you know what size of cylinder should I get
to split mainly 16 inch, but sometime maybe 18 or 20 inch? What should the stroke length be? the length of the log + 4, 5, or 6 inch or more?

If you have 80HP on the PTO there is no reason to not go with 5" on the cylinder.

I am a little confused of what you are saying. You mention the PTO pump, and then you mention 2 pumps. It does not make sense (to me at least).

Things are not so complicated. Take whatever flow you get from the PTO, and divide (you can use variable flow divider) that flow in 2 or 3, one for the splitter, one for the saw, and one for what else you want to use at the same time. Find a motor (not these gear type cheap ones on the surpluscenter) that can utilize the abundance of power from your PTO and thats it,

But let us know what exactly are your goals, because some stuff do not make sense. Others will chip in to help you as soon as you know what exactly you do want to achieve.

 

[Millet]

Maybe I didn't explain myself clearly. I want two pump but if one is enough I will go with juste one pump.

Do you mean something like this to divide the flow? I simplify the circuit for the demonstration. there is just a pump,some divider valve and actuator:
It's not exactly a variable flow divider, but I didn't have one on my simulator.




Also what kind of motor do you have in mind? a f11 Parker? for the chainsaw? Do you think I can still use a gear motor from surpluscenter? the parker motor are very expensive.
What's wrong with gear motor if I use correct sprocket?

 

[polemidis]

You can use the gear motors from the surplus, absolutely! These are what I use on my processors actually. You just cannot utilize that much power that you have on the tractor. If the F11 or other bent axis motors are out of your budget then there is no question, ok.
Of course you can do one pump.

But as I said before. You have not given us a goal, a budget, what you want to achieve, what species you gonna cut, how many functions you want to run at the same time etc. Set these 1st, and then we can give you more targeted answers.

 

[texasranger556]

I agree, define what you want to do as far as wood size, cords per hour, etc. Perhaps most importantly budget. You might consider things like a 2 stage pump for the split cylinder to save on cost, or run a higher pressure to get more force from a smaller diameter cylinder and faster cycle time than a big cylinder at lower pressure. Then run your other cylinders off a separate pump with lower pressure, etc. There's lots of ways to do things. Often with projects like this people already have some parts salvaged for cheap and design the rest of the system around it. Are you planning to buy everything brand new? Do you want to automate some or all of the system?

 

[Millet]

I have mainly maple, ash and beech. I would like to process 200 face cord per year.

My budget is 7000 Canadian dollar. I need to purchase almost everything.

I want to have a log table infeed, something like this:







Theses models are driving by the PTO of the tractor.

 

[Millet]

I am in the design phase.

I have a question, What size the H beam of the splitter must be, knowing that the splitter
will probably have at least 20 ton force.

 

[4570Man]

I know that a short beam is better than a tall one. Go heavy duty. A bending beam is a nightmare. I’d probably use at minimum 6x6” 1/2” flange. Even better scrap the beam and use a piece of tubing with a flat plate on top.

 

[polemidis]

On my both splitters I used W8-35 beam

 

[Ivan49]

I have mainly maple, ash and beech. I would like to process 200 face cord per year.

My budget is 7000 Canadian dollar. I need to purchase almost everything.

I want to have a log table infeed, something like this:


View attachment 590901

View attachment 590904


Theses models are driving by the PTO of the tractor.

If you notice those have a PTO shaft on them. That means the pump is left on the processor l the time. Do some research on them and see but I would not be surprised if they don't have a gear box running that pump. That way you can use lower RPM's on your tractor. E mail the company or talk to a dealer that is the best way to get info to build what you want and then you can use ideas from several to make yours

 

[polemidis]

If you notice those have a PTO shaft on them. That means the pump is left on the processor l the time. Do some research on them and see but I would not be surprised if they don't have a gear box running that pump. That way you can use lower RPM's on your tractor. E mail the company or talk to a dealer that is the best way to get info to build what you want and then you can use ideas from several to make yours

Why should they have gearboxes? It does not make sense to me. They size the hydraulic pump accordingly. There is no need for mechanical gearing down since the hydraulic pump's displacement will be sized to match the load and flow

 

[Ivan49]

Why should they have gearboxes? It does not make sense to me. They size the hydraulic pump accordingly. There is no need for mechanical gearing down since the hydraulic pump's displacement will be sized to match the load and flow

Because they do not run the tractor wide open to get the output from the pump. A tractor does not turn at 540 RPM's until it is between half and 3/4 throttle and I know for a fact the one I saw run the tractor was not running at 1/2 throttle

 

[4570Man]

Just use a higher gpm pump and turn it slower to accomplish the flow you need.

 

[polemidis]

Just use a higher gpm pump and turn it slower to accomplish the flow you need.

Exactly. And especially with his 80Hp tractor, he can have more power that he can utilize without buying the super expensive motors like the F11, even in low rpms.

 

[Millet]

The models that I "study" have indeed a gearboxes and regular gear pumps, most of the time between two and three.



Example:
If you look closely you will see it





This one above have an angle gear box.

But they always say on their manual to run the tractor pto at 520-540 rpm.

My tractor motor need to be at 1900 rpm to drive the pto at 540rpm. max rpm is 2200

But i can have a direct pto link to the tractor motor or 1000 rpm.

My idea was to use some pto pump.



maybe two on the same shaft.

4570man I like your idea, because I think that my tractor reach max torque at 1400 rpm I think. so no need to go higher.

 

[Millet]

I found some answer about a question that I ask on this website:


Do you know something about the thing below the solenoid that look like a manifold, that we see in the video below, at 2min 52 sec?


Combine Bois TAJFUN RCA 48 avec porteur CEMET - YouTube


Well I found something similar on surpluscenter.com and they call it a "subplate" .

4 Station D3 Parallel CC Subplate | Subplates | Hydraulic Adapters & Fittings | Hydraulics | www.surpluscenter.com

I don't know if it's exactly the same thing that we see on the video, but if I go with solenoid operated I can use something like that.

 

[Millet]

I have a new question:

Do you think that the valve of the hydraulic chainsaw need a motor spool (work ports A and B connected when valve in neutral) ?

Or there is not enough inertia to have this kind a valve?

Thanks

 

[polemidis]

I have a new question:

Do you think that the valve of the hydraulic chainsaw need a motor spool (work ports A and B connected when valve in neutral) ?

Or there is not enough inertia to have this kind a valve?

Thanks

Do you think that a sudden stop from 5000rpms will not cause any damage?