On impact, the downward motion of the
plunger assembly displaces oil through the
metering tube holes, thereby decelerating the
impacting mass. The buffer’s performance
characteristics are dependent upon the size
and distribution of these holes.
The re-extension of the plunger after impact is
effected by a unique gas spring. This gas spring
contains nitrogen at a pressure of 20 to 30 bar.
The area differential between the top and
bottom of the piston results in a net force
which re-extends the plunger after the
compressive load is removed; (the gas is not
compressed)
Thus the butter performance on impact relies
solely on oil displacement: the gas spring
serves only to re-extend the plunger.
Moreover, frictional forces ensure that the
Plunger remains re-extended. |
