Allied HO-PAC 1000 Series, Техническое руководство, Страница: 8 / 50

1000 Series Ho-Pac
SECTION 3.0
PRINCIPLES OF OPERATION
3.1 Ho-Pac
The Allied Ho-Pac is a high-energy
compaction tool utilizing three compaction
techniques:
•
The IMPULSE FORCE generated
by the rotating eccentric mass
vibrates the soil near the base plate
to eliminate voids between material
particles.
•
The VIBRATION FREQUENCY
of 2000 r.p.m. provides maximum
effectiveness for the consolidation
and compaction of granular soil
materials.
•
The DOWN FORCE of the carrier
provides a preload force to
effectively transfer the vibrating
energy and to compress the
material.
Optimum compaction is usually obtained
with two passes. The duration of the initial
pass is dependent on depth and material.
The second pass may require additional fill
material and Ho-Pac repositioning to
achieve a finished surface.
The Allied Ho-Pac can also be an effective
sheet or pile driver. The Ho-Pac’s
vibration energy is transferred through the
sheet or pile to the soil. Sandy soils and
moist clays are “softened” by the vibration,
which allows the sheet or pile to penetrate
more easily.
3.2 Hydraulic Installation Definition
Efficient operation, production rates and
service life of Allied attachments depend
on the correct hydraulic oil flow and
pressures. Adjust the carrier's hydraulic
system accordingly during installation and
start-up. Among other important
information, the Allied technical
specifications include Hydraulic Flow,
Operating Pressure, Dynamic Relief
Pressure and Static Relief Pressure. These
parameters are defined as:
•
HYDRAULIC FLOW is the
hydraulic oil flow range, minimum
to maximum, necessary for proper
attachment operation. Operating
the attachment outside this range
can result in inefficient operation,
damage to the attachment, or injury
to personnel.
•
HYDRAULIC OPERATING
PRESSURE is the average
hydraulic oil pressure measured at
the attachment during operation.
The Hydraulic Operating Pressure
range is the range of pressure
required to operate the attachment
throughout the Hydraulic Flow
range. The Operating Pressure is
not to be used as a relief valve
pressure setting.
•
DYNAMIC RELIEF PRESSURE
is the hydraulic oil pressure when
the relief valve starts to open and
divert oil back to the carrier instead
of the attachment. The carrier's
hydraulic system shall be capable
of providing the desired oil flow at
a pressure equal to at least the
dynamic relief pressure. Also it is
very important not to control the oil
flow with the relief valve. This
may cause significant heat
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