Jerky project cylinder action

[yarg]

JJ,
I finally got to the shop with gas and time to test the motor on and ram valve at the same time actuation.

With the head motor on Diverting the vast majority of oil thru the motor, I triggered the ram valve and it moved perfect. So dropping the pressure and slowing the ram fill will do the trick.
This is heat I hope the low pressure relief valve and needle control valve does for me?
In my reading I also saw a priority flow control valve and need to ask you this, does the bypass flow of this valve have a pressure to overcome or is it free flow without back pressure? A valve of this sort would reduce flow and pressure though tyw ram valve.

 

[bigdeano]

Good news. Personally I would put an adjustable priority flow control valve on it. Then you can adjust the speed right where you want it. Brand Hydraulics makes a good one. I have one on my tractor to adjust the speed of the loader and 3 ph. They have no back pressure on the excess flow port. You can many times find new ones cheap on ebay.

 

[yarg]

Bigdeano,

You answered my question on that sort of valve. I did not know if the bypass was free flow or pressurized br a relief of some sort. I also thought that a valve like that would be the least stressful on my pump motor combination as there would be free flow fir the bulk of my oil even when spooking the ram. I may still do this if the low pressure relief catradge and needle valve do not control things properly.

I was happy to find that the ram could work right with a con tolled flow rate and pressure))) very happy.
Gray

 

[yarg]

JJ,
I finally got to the shop with gas and time to test the motor on and ram valve at the same time actuation.

With the head motor on Diverting the vast majority of oil thru the motor, I triggered the ram valve and it moved perfect. So dropping the pressure and slowing the ram fill will do the trick.
This is heat I hope the low pressure relief valve and needle control valve does for me?
In my reading I also saw a priority flow control valve and need to ask you this, does the bypass flow of this valve have a pressure to overcome or is it free flow without back pressure? A valve of this sort would reduce flow and pressure though tyw ram valve.

I have attached a few piics that may allow you to better understand the machine?

 

[J_J]

JJ,
I finally got to the shop with gas and time to test the motor on and ram valve at the same time actuation.

With the head motor on Diverting the vast majority of oil thru the motor, I triggered the ram valve and it moved perfect. So dropping the pressure and slowing the ram fill will do the trick.
This is heat I hope the low pressure relief valve and needle control valve does for me?
In my reading I also saw a priority flow control valve and need to ask you this, does the bypass flow of this valve have a pressure to overcome or is it free flow without back pressure? A valve of this sort would reduce flow and pressure though tyw ram valve.

You did not drop the pressure. It is developed.

Of course the ram should work reasonably well, as the hyd motors are using most of the fluid.

You might be thinking of the priority flow divider I posted that will provide a small priority GPM for the ram. The remainder of the pump flow will be using the excess flow through the flow divider. It also has a relief.

Again, the hyd component , be it a hyd motor or cyl, develops the pressure. It only develops max pressure when fully loaded, weight wise or motor torque utilized. You might never see max pressure unless you stall the hyd motors or hold the cyl lever to max.

A hyd gage in the hyd system will show what is going on.

For a complete system test, a flow meter, pressure gage, relief valve, and needle valve is required.

 

[bigdeano]

Thanks for the pictures. That's quite a project. It looks very nicely done. Are you going into the well drilling business.

Here's the catalog page so you can see just what I'm talking about. There are of course other brands of the same thing.

http://www.brand-hyd.com/fc/catalog.pdf

 

[yarg]

Yes, you mentioned a valve like that and I saw in a previous post that there is free flow through the open side of the valve but you mentioned that it is Pressurrized?
Which is it? I also thought it was pressurized from some earlier reading and that would make it no better than the flow going through a reduced pressure relief valve which I can put in my current spool valve with a low pressure cartridge. So rather than have a second valve to mount I thought I would just change out the current relief portion of my current spool valve.
In any case, as soon as the new parts show up, I will try my fix and report back on the outcome.
BTW--- I have a pressure gauge in the unit but it is where I need another person to read it
I also have looked up and found a 26 HP direct trade out two cylinder engine that some day I may replace the 21 hp size if I need to upgrade for power. I would rather do an engine upgrade than a pump downgrade if there are issues and needs.

Ho. and the rig is designed to slide onto and lock on most any 2000 GVW+ trailer and also can fit into an 8 ft. truck box if needed. I have three trailers and he has one so this way, we can move it anywhere either of us at any time. He can even take it into the woods with his four wheeler and rough terrain trailer I haul the drill water in on a second trailer?

 

[yarg]

A friend and I have need for four wells ( about 300 ft.) and many more if it works good? At 50 to 60 $ per foot around here, this means after about 130 ft. it is all paid for
We put 5000 all in for it with everything including mud pump, bit and pipe. No, I am not going to be a well driller---I am retired as a building trades and electronics teacher, building on the side with a contractors license for 30 years and for the past five years, I have been the superintendent of schools part time. No time for fun)) The build of this rig was my fun! Took me 5 weeks after school and some weekend days. Love to build things out of wood and metal. It is my therapy? Stress relief until something does not work
Thanks for the compliment, hope it works as well as it looks?

 

[bigdeano]

The pump will have to develop enough pressure to raise the ram, no more. The excess flow goes out the excess flow port and to the tank without any additional restriction.

Since you already have a relief valve in your system, you can buy the model without a relief valve.

 

[J_J]

yarg, bigdeano

I want to ask three questions.

If I raise a ram with no load, how much pressure does it take to fully extend the cyl.

When I get to full extend of the cyl stroke, and keep holding the lever how much pressure will show on a gage.

What is the purpose of the relief valve?