SECTION 9
HYDRAULIC SYSTEM
Nov 2002
p. 9-1
05130471
Section 9 HYDRAULIC SYSTEM
9 Hydraulic System
The hydraulic system drives the water intensifier assembly to produce a
HP waterjet cutting stream. The hydraulic system is composed of a
variable- displacement; pressure- compensated axial piston pump, driven
by an electric motor.
The hydraulic system is designed to provide sufficient hydraulic oil flow
at sufficient pressure to supply the intensifier, at its specified maximum
output conditions of flow and pressure. Refer to Section 11,
Specifications.
9.1 Overview
The hydraulic system includes two hydraulic circuits each with its own
pump:
• Main hydraulic power control circuit which uses the piston pump
(discussed in this section), and the
• Recirculation system which uses a gear pump mounted in tandem
with the piston pump (discussed in Section 10, Recirculation
System).
A single hydraulic pump and a directional control valve (DCV) are used to
control the intensifier hydraulic cylinder. The hydraulic manifold, which
includes the solenoid–operated DCV, is mounted beneath the intensifier
hydraulic cylinder. The hydraulic system also includes plumbing to
connect pump, valve manifold and reservoir.
9.1.1 Features
Features of the hydraulic power and control system are listed below:
• Hydraulic unloading during motor start.
• Hydraulic 4-way valve – directional control valve (DCV)–solenoid–
operated. Used for HP cylinder shifting.
• Close - coupled motor/hydraulic pump – pump mounts directly to
the motor, providing a compact pump/motor assembly, reducing
footprint of the overall waterjet pump package. The pump is directly
coupled to the motor rather than a conventional standoff housing and
shaft coupling assembly.
• Reference hydraulic gage – used for adjusting pressures in the
pump compensator. Displays hydraulic pressure and provides an
indication of water pressure.
• Built in hydraulic oil drip pan – allows for the spills to be contained
within the machine while addressing environmental issues of mixing
water and oil.
To Next Page
Loading...
Need help?
General
