Processor

[Lea]

I知 starting to commission my home made firewood processor,and I am having trouble with the splitter on it.
I seems like it is building too mush presure on the splitting cycle and the drive chain to the hydraulic pump is jumping. Upon closer inspection I noticed both key ways were broke. I知 mean the quarter inch keys on the shaft of the pump and the shaft on the drive. That would tell me too high of pressure, but everything else works good with no problems. My cylinder is 4 with 2 rod. Is it possible that y cylinder is just too small? The pump is a four bank gear pump and the splitter is on its own bank.
Anyone got any ideas?

 

[oldnslo]

Have you checked the relief valve setting on the splitter valve. From your description this would have a separate relief from the other functions.

Note: I couldn稚 view the picture so you may be showing something that answers my question.

 

[Lea]

The relief valve does seem to be working.
But as soon as the splitter stars to build pressure the chain skips, and I know that is going to cost me very quickly
The relief seems to opening around 1500psi

 

[4570Man]

That’s only about 9 tons. Are you sure it’s only 1500 psi? How tight is that chain?

 

[Lea]

The chain is as tight as I dare to tighten it. It doesn’t have a idler on it but one is in the works for it
Is there a possibility that the pump could be turning the wrong way

 

[4570Man]

It would seem that as long as the system is working the pump it’s self isn’t the problem, but I guess it’s possible.

 

[ericm979]

If the chain or sprockets are worn the chain can skip. Also if the sprockets are not in parallel and in plane- chains like to go straight.
Smaller sprockets can handle less torque. The small one may be too small. I think there's formulas for allowable torque for each chain size. Maybe in Machinery Handbook?

 

[muddstopper]

No pictures of broken keyways, but the fact that they are 1/4 in suggests to me you are using small dia shafts, at least on the sprockets. It also looks like you are using a pretty small size chain with a lot of distance between the two sprockets. I would try installing some sort of idler sprocket to take up any slack that occurs when the sprockets come under load (stretch). The longer the distance between the two sprockets, the more likely the chains will stretch and slip. It diesnt take much slack or stretch for a small chain to jump over the sprocket teeth on the smaller sprocket.

 

[Leejohn]

While you are working on it you might want to check the side load on the pump. I used number 50 chain on my splitter

 

[Lea]

The chain and sprockets are new #60 chain.
It almost seems like the pump is fighting against itself
I worked on it for about an hour today and thought maybe the filter is plugged on return line. I’ll check tomorrow and see if it’s plugged. Is this a possible cause?