electrically operated ball valve

[jonsstihl]

I hadn't thought of limiting the flow from the accumulator back into the system but the poppet style valve would provide a little restriction due to the 50 -150 psi check valve.

 

[jonsstihl]

pre charge pressure settings are where the magic happens. I see that the wr long kit uses two balloons, one for empty damping and one for loaded. most manufacturers of accumulators warn against bottoming out the accumulator but the wr long kit must bottom out the accumulator set for empty ride control to start using the accumulator set to loaded ride control.

 

[oldnslo]

James,
If this link works it is for a Rexroth ride control system. Probably far more elaborate that what you require but it might provide some guidance on what is required to make these systems work. If the link does not work I just googled Rexroth ride control. Or search for RE64614, that is the data sheet number.

You will require far more restriction that 50 - 150 PSI will generate. I would suspect that a boded bucket will require 2000 PSI to lift.

https://md.boschrexroth.com/modules...D6D3C080CAA0.borex-tc&sch=M&id=13812,20,54374

 

[jonsstihl]

thanks for the link
the pressure I refered to was for the bounce back flow from the accumulator back to the system but I suspect I will need some kind of flow limiter instead of just the poppet valve. tractor pressure is set to 2630 so I'm assuming a full capacity lift would require that much psi.

 

[oldnslo]

James,
I also found this link for Hydraforce.

HydraForce - Application Wheel Loader Solutions

 

[Texasmark]

Agree on a solenoid which is an off-on, spring loaded switch. Powering up, it goes from closed to fully open and cut power and the spring slams it shut. Beware of transients in the system using a solenoid. Kinetic energy stored in the flowing fluid has to be absorbed somewhere when you try to stop it. Best thing would be either a Water Hammer type device, like used in household plumbing for absorbing shock from the washing machine or dish washer turning on and off (very impractical in a simple, small system, or a slowly moving device of which I know not. Cutting engine rpms to idle can go a long way in making a solenoid work for you....just don't forget to idle down first when stopping the flow.

W.W. Graingers is one source.

 

[rScotty]

I don't have any new ideas to offer yet, but just following along on this project. I hope you do it; I'd like to add something similar to our Kubota M59

We do have ride control on our full size JD310 backhoe. There the ride control is controlled by a simple electric switch from inside the cab....probably a solenoid & accumulator of some sort.
I've not looked at it in detail, but it works beautifully. Something similar could be very simple and would be a big improvement for every machine with a FEL. Fairly simple to do, too.
It would make a great group project.

For a solenoid - or for any hydraulic component - I usually start by looking at: Hydraulics | www.surpluscenter.com
rScotty

 

[jonsstihl]

The only flow the system would see is when the loader is bouncing. This system would be similar to a water hammer in the lift circuit of the loader but with an on off switch.