OPERATION
The NPK Vibratory Soil Compactor/Driver derives its power source from the backhoe or
excavator on which it is mounted. High efficiency is achieved through a combination of
forces developed by the compactor and carrier machine: impulse force, vibration, and
downforce. A direct drive hydraulic motor rotates an eccentric mass at high speed to
produce impulse force and vibration. Impulse force is desirable for clay or cohesive
soil, while vibration is effective in granular or loose soil material.
Static down pressure from the backhoe or excavator plus the weight of the compactor
produces downforce into the material being compacted. As the soil density increases
towards the maximum obtainable density, the resistance and developed hydraulic
pressure increases. The hydraulic pressure to the compactor is a result of the
compactive effort applied to the soil. As the compactor is pressed against the material,
the hydraulic pressure to the motor will rise. The greater the downforce, the greater the
compactive force developed.
For best results, the rubber mounts, which isolate the lower frame from the upper frame,
should be deflected no greater than one-half diameter, see below.
The rubber mounts (DY) should not be deflected so far that the upper frame (EG)
contacts the baseplate (bp1) of the lower frame. Do not overstress the rubber
mounts by applying heavy down pressure and pulling or pushing (ironing) with
the stick.
To Next Page
Loading...