Firewood processor help

[J_J]

I have not seen or heard about a relief valve installed in the system yet.

If he can develop pressure, the cyl wil work.

Haven't seen any pressures yet.

A 5 HP electric motor could run the log splitter cyl independently.

I can't understand why a 5000 psi hyd gauge was left out of the system.

5000 PSI 2.5" LF LM GAUGE CF1P-350-A

The installation of the gauge could have answered most of the questions about what was happening.

Since you have 4 pumps, the gauge could plug into each pump to check pressure.

Install a male QD on each pump. Just plug in to check pressure, or leave it in place.

 

[ptsg]

The relief valve can be seen in the video @min 5, it is in the valve block. There are also 3 pressure gauge.

 

[J_J]

I missed that, will take another look.

Where is the relief valve?

He said he didn't know anything about a relief valve or setting.

If the pressure had been developed as high as 3000, he could have 42 tons of force.

So something is wrong.

The pump have the potential to generate volume, and the cyl's surely can develop the pressure.

I can see a big problem with all pumps running and developing max pressure.

What I am saying is that if just the one pump feeding that cyl, and the relief set right, it could split a car in half or rip the cyl off the frame.

 

[jonix]

well, J.J...the cylinder almost rip off the frame indeed.. Think the guilt is not totally in engineer, but in eucalyptus too..dry eucalyptus can generate lots of pressure i guess..

today we met with the engineer, and i was able to understand is idea..within a day or two, we will put almost 60 tons against the guilty one at 3700 PSI..and we'll see what will happen..

The system as both 13,5 GPM and 10,5 GPM pumps for splitter valve, witch has two relief valves, and they will be set at something like 2500 and 3500 PSI respectively. This splitter valve is "a proper valve to swap between pumpss", according with the relief settings..so, my 25 HP should hang up with this maximum setup. I do the math from surplus center, and i think it is correct: 25Hp can handle with 13,5 GPM at 2500 PSI, generating 39 ton with a extend time of 10 sec for a 17,5 cylinder stroke..if this is not enough (think eucalyptus may agree with this, and engineer too), then my 25Hp will push 55 ton on the 10,5 GPM pump at 3500 PSI..should split a bus in half..

Then, i think i can push my 5 GPM pump to do all the stuff (log feeding, clamping, etc), while my two bigger pumps are resting and pumping oil to the tank without pressure (well, as a matter of fact, only one should be resting because my 13,5 GPM pump will be retracting the cylinder with very low pressure) ..and then, when all the stuff were done, my smallest pump can rest to, while my two bigger pumps still resting , and i can push my 7,5 GPM pump to my F11-005 while all the pumps are resting, because i can't do anything else while cutting is going on..

who do you think is the "guilty one"? engineer or eucalyptus..?

I think they are both, but for the two of them i will need a bigger cylinder..and think more steel..

I think I also have a share on guilty because I should have studied a little bit of hydraulic before meeting with the engineer, in the early phase of the project..

 

[J_J]

Yes sir, it is best to do your homework, because if you give the engineer the wrong data, and he will use that to mess things up on your end.

With a good wedge design, you should be able to split anything, even sideways.

If you watch your hyd gauges, you can tell if the machine is working at max, or not working at all.

You never did say the max psi of the cyl.

Do you know how to check or set the relief pressure?

 

[jonix]

Do you think this is a good wedge design?

The max psi of the cylinder is unknown..it is shop made! think they know what they are doing..

There are two screws to set the relief pressure, in the valve..since my hydraulic gauge is for all the valve, and not for one pump at the time, i have to figure out how i´m going to check the pump pressures, individually..may i have to use one of those gauges that you have shown..

 

[jonix]

Do you think this is a good wedge design? View attachment 432242View attachment 432243View attachment 432244

The max psi of the cylinder is unknown..it is shop made! think they know what they are doing..

There are two screws to set the relief pressure, in the valve..since my hydraulic gauge is for all the valve, and not for one pump at the time, i have to figure out how iｴm going to check the pump pressures, individually..may i have to use one of those gauges that you have shown..

 

[J_J]

Your wedge design looks OK.

You definitely need a relief valve in the circuit going to the cyl.

Is your cyl return automatic or manual as in holding down button.

Install a male Quick Disconnect in each of the pump circuits that will match your test QD's

Connect the test gauge with no pressure in the system.

What was the purpose of the three gauges I saw in the video?

 

[jonix]

jonix,
here are some formula based on the metric system.

For reference:
The saw pump of 34 lpm @ 150 Bar requires 10 kW power at 85% efficient

Splitter pumps:
50 lpm @ 250 Bar requires 24.5 kW power at 85% efficient (I used 250 bar since a lot of gear pumps are rated to 250 Bar)
this does not take into consideration any other loads on the motor of which there will be.

Thanks!

is not easy to post it all in GPM, PSI, inches and HP..

 

[jonix]

So you are saying that with two independent pumps, one with high GPM and low pressure and other with low GPM and high pressure, with the proper valve to swap between pumps, canｴt do the same as a 2 stage pump? Because it is probably what jonix has in his processor.

The problem that jonix is experiencing must be the relief valves and unloading pressure not set right, it probably cause the system to produce excessive pressure when it shouldn't.

For what I can see, this processor is made to work automatic, that's why they use solenoid valves and not a log splitter valve.

you have seen it all!

thats right! the processor will work semi-automatic, since log deck is manual..and last lenght cut too..