Special Cylinders · Hydraulic Cylinder with Hydraulic Interlock0 pages

Hydraulic Cylinder
with Hydraulic Interlock
Function:
The connection on that side of the hydraulic cylinder where
the external load to be held must be counteracted, is closed
with a pilot operated check valve. For that reason the liquid
cannot drain off while under exposure and the piston cannot move inside the cylinder. The cylinder is interlocked.
When the opposite side of the cylinder is hydraulically
charged with pressure, the check valve is actuated via a
control pipe and the piston rod can be moved.
The interlock is stiff within the limits of the compressibility of
the liquid.
The enclosed oil volume is minimal and the seal kit is
adapted to the special requirements of the load-holding
function to optimize the stiffness.
The stiffness of the reinforced cylinder type is more than
doubled through higher primary pressure. The lock is stiff
as long as the force that is directed through the piston rod
into the cylinder does not generate a higher pressure than
the pressure already existing.
Very large retention forces can be put into effect with this
hydraulic cylinder.
A major advantage of the hydraulic interlock compared
to a mechanical interlock is that no complicated manual readjustment has to take place to react to setting
characteristics. This is done automatically at every
stroke.