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Re: Hydrolic dump trailer
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Posted by mj on April 09, 2005 at 23:30:40 from (4.225.206.90):
In Reply to: Hydrolic dump trailer posted by Claude on April 09, 2005 at 15:29:42:
You can raise any amount of weight with any
amount of pressure....the more weight for a
given pressure the more cylinder area needed
and the slower the ram will extend since you
are pumping more volume into a larger cavity.
For instance: 1000 psi will develop a force of
3,1416 pounds at the ram of a 2" dia. cylinder
(1000 x pi x radius squared) while a 4" cylinder
will develop 12,566 of force at the same
pressure. If the self contained electric
systems commonly used on dump trailers
use a 2000 psi pump and your tractor is only
developing 1000 psi then you will need twice
the cylinder area (NOT twice the diameter) to
accomplish the same lifting ability with the
reduced pressure. If you build from scratch
figure the force that you require, measure the
psi of your hydraulic system and then
calculate the size of the piston required....add
a 'fudge factor ' ( I like 10 to 20 per cent) and
you should be good to go.
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