Buck123
Member
Hi all!
I've been working on a design for a mining conveyor that requires it to fold up in a way I haven't done before and I was wondering if anyone here know how to get the functionality below working.
So I have 2 sets of hydraulic rams, one set to hold the conveyor up and to change it's angle, and another set to fold it and unfold it. However the lifting rams are to be connected to the folding section of the conveyor. Which means that while the conveyor is being folded or unfolded the lift rams must float, and vice versa. The lift rams need to naturally extend, and retract during the folding operation.
When the lift rams are being operated in either direction the fold rams must float (to allow partial unfolding using lift rams)
When the lift rams are not being operated they must hold the load, preferably with over centre valves, unless fold rams are being operated, in which case they must float again.
Fold rams do not need to be locked in neutral position as the lift rams will support the weigh, however if possible it would be great if both sets of rams could be locked out in neutral position.
As the conveyor folds 180°, there will be runaway load effect on both sets of rams, since the load will go over the pivot point so over centre valve or at least a needle valve should be integrated in the circuit somewhere to prevent choppy movement or even worse vacuum and cavitation.
I've drawn several circuits to try and work this out but it just doesn't seem like it would work. Has anyone ever encountered a circuit like this, or have any suggestions on how I would go about making this work? Perhaps there's some easy way of doing it using some component that I didn't think of.
Thanks a lot it advance!
I've been working on a design for a mining conveyor that requires it to fold up in a way I haven't done before and I was wondering if anyone here know how to get the functionality below working.
So I have 2 sets of hydraulic rams, one set to hold the conveyor up and to change it's angle, and another set to fold it and unfold it. However the lifting rams are to be connected to the folding section of the conveyor. Which means that while the conveyor is being folded or unfolded the lift rams must float, and vice versa. The lift rams need to naturally extend, and retract during the folding operation.
When the lift rams are being operated in either direction the fold rams must float (to allow partial unfolding using lift rams)
When the lift rams are not being operated they must hold the load, preferably with over centre valves, unless fold rams are being operated, in which case they must float again.
Fold rams do not need to be locked in neutral position as the lift rams will support the weigh, however if possible it would be great if both sets of rams could be locked out in neutral position.
As the conveyor folds 180°, there will be runaway load effect on both sets of rams, since the load will go over the pivot point so over centre valve or at least a needle valve should be integrated in the circuit somewhere to prevent choppy movement or even worse vacuum and cavitation.
I've drawn several circuits to try and work this out but it just doesn't seem like it would work. Has anyone ever encountered a circuit like this, or have any suggestions on how I would go about making this work? Perhaps there's some easy way of doing it using some component that I didn't think of.
Thanks a lot it advance!