I am trying to build a hydraulic capstan winch like the Norwood Skid Winch (they won't sell theirs unless you buy a mill too). http://www.norwoodsawmills.com/products-log-skidding/skid-winch
I've found hydraulic drive gear motors that should be perfect for the application... it's designed for high axial load and has gobs of torque.
http://www.surpluscenter.com/Hydrau...-DYNAMIC-BMSY250E2KS-HYD-MOTOR-9-7080-250.axd
But I have a question about proper system design. I get that the rear remote valve is going to control the hydraulic flow rate and direction but if I understand it correctly. The full PSI of the system will be present almost immediately, right? So I need to either get a motor that's rated for the full pressure or lower the pressure somehow.
Can I just plumb in an adjustable pressure relief like this?
http://www.northerntool.com/shop/tools/product_200335623_200335623
I suspect the answer is no. I'm thinking once pressure goes over the set-point that valve will open and dump all of the pressure until it drops down again. I thinking that instead of balancing the system it'll end up "hammering" open/closed again until something breaks. Right?
So... a few questions:
1) if I'm right about the above how can I lower the pressure to the pump?
2) Does anybody know the actual system pressure of an L47? I can't find it anywhere
3) how do I calculate the total pulling force available given the pump's in-lbs of torque and a 2.5" diameter capstan?
I've found hydraulic drive gear motors that should be perfect for the application... it's designed for high axial load and has gobs of torque.
http://www.surpluscenter.com/Hydrau...-DYNAMIC-BMSY250E2KS-HYD-MOTOR-9-7080-250.axd
But I have a question about proper system design. I get that the rear remote valve is going to control the hydraulic flow rate and direction but if I understand it correctly. The full PSI of the system will be present almost immediately, right? So I need to either get a motor that's rated for the full pressure or lower the pressure somehow.
Can I just plumb in an adjustable pressure relief like this?
http://www.northerntool.com/shop/tools/product_200335623_200335623
I suspect the answer is no. I'm thinking once pressure goes over the set-point that valve will open and dump all of the pressure until it drops down again. I thinking that instead of balancing the system it'll end up "hammering" open/closed again until something breaks. Right?
So... a few questions:
1) if I'm right about the above how can I lower the pressure to the pump?
2) Does anybody know the actual system pressure of an L47? I can't find it anywhere
3) how do I calculate the total pulling force available given the pump's in-lbs of torque and a 2.5" diameter capstan?