2nd function on a log splitter

[jezorek]

would like to power a conveyor from my log splitter. Can I tie into the log splitter circuit to power a hydraulic motor? The splitter valve is an open circuit, spring return. Can I plumb the motor using the open circuit return line? Will this method still be protected by the pressure relief valve?

 

[AKKAMAAN]

would like to power a conveyor from my log splitter.

Do you want conveyor to run continuously?

Can I tie into the log splitter circuit to power a hydraulic motor?

You could use the logs plitter pump, but would need a second control valve, plumbed power beyond

Can I plumb the motor using the open circuit return line?

see above

Will this method still be protected by the pressure relief valve?

NO, not if pressure relief valve wont have a free return straight to tank (via filter ok)


If you want conveyor to run continuously with out being interrupted by log splitter, you need it on its own pump circuit...
You must not plumb it in series with the log splitter cylinder on the return line!!

 

[jezorek]

The conveyor does not have to run continuously although it would be nice if it did. Can I use the open circuit return line with a flow control valve that has a pressure relief valve built in?

 

[AKKAMAAN]

The conveyor does not have to run continuously although it would be nice if it did. Can I use the open circuit return line with a flow control valve that has a pressure relief valve built in?

Do you want splitter to wait for the conveyor?

Or the only other option is to use a flow diverter after the pump, but that will permanently cut you splitter capacity (flow=cycle time).......so that is still "splitter waiting for conveyor" ....
Flow diverter is definitely NOT a good idea if you are using a two stage pump....

Back to square one....either operate splitter and conveyor separately (power beyond connected 2nd conveyor valve), or use separate pump for conveyor circuit...

 

[DAY]

In Ancient Times a farmer would jack up the back end of his Poppin' Johnny, and run a wide belt around the tire, to power a buzz saw. Dangerous as ****, but that was in the days before the chain saw.

I had a pulley that ran off the PTO, and used a belt to power a hammer mill, back in the 70's. Tractors used to be a stationary power source for a lot of tools, in the Days of Yore.

 

[J_J]

Are you using tractor hydraulics or an small engine and a 2 stage pump? If using tractor hydraulics, you could use a divider valve for continuous operation of a hyd motor. The divider valve would split the hyd flow into something like 3 GPM in one circuit [ conveyor ] and 7 GPM into another circuit , [ log splitter ].

 

[J_J]

I am not so sure that a basic log splitter valve will handle a high back pressure. Sure, you could install another valve in series with the log splitter valve, but when the log splitter is working, what kind of pressure will the other valve have . If the other valve is powering the conveyor, then it receives the expended fluid from the hyd cyl. You need to split the flow before the log splitter valve.

If you connect the valve with PB, then the next/other valve running the conveyor will quit, because all the fluid the log splitter is using is now going out the tank port.

 

[jezorek]

I did some experimenting today and came up with a satisfactory setup. I piped the open center return of the log splitter valve to a flow contol valve equipped with a pressure relief bypass. The excess flow line of the flow control valve tees into the outlet of the conveyor motor and they discharge into the filter/resivoir.
When the splitter is not splitting, the conveyor runs. It stops when the splitter valve is actuated. This is all I need since I can't split and load the conveyoy at the same time.

 

[AKKAMAAN]

I did some experimenting today and came up with a satisfactory setup. I piped the open center return of the log splitter valve to a flow contol valve equipped with a pressure relief bypass. The excess flow line of the flow control valve tees into the outlet of the conveyor motor and they discharge into the filter/resivoir.
When the splitter is not splitting, the conveyor runs. It stops when the splitter valve is actuated. This is all I need since I can't split and load the conveyoy at the same time.

good....

If conveyor motor induce higher pressure than 400-600psi, you definitely risk to blow the low pressure spool seals (o-rings) on the splitter valve. If pressure increases to higher levels, you even risk to crack the valve housing on the splitter valve...These problems can be prevented with a splitter valve that have a power beyond optional return outlet.

 

[jezorek]

good....

If conveyor motor induce higher pressure than 400-600psi, you definitely risk to blow the low pressure spool seals (o-rings) on the splitter valve. If pressure increases to higher levels, you even risk to crack the valve housing on the splitter valve...These problems can be prevented with a splitter valve that have a power beyond optional return outlet.

Akkamaan,

Thanks for your replys. I'm not sure I understand why the seals would blow on the splitter valve. Why wouldn't they blow when the second stage kicks in during splitting? I am not challenging your assertion- I just don't understand.
I will put a gauge on the output side of the splitter valve to see what pressures develope. If necessary, I will change the splitter valve. Can you name a brand and model of the valve you describe?

Do you see any problem with teeing the excess flow line and motor return line together?

Thanks in advance