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LA11
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Sida 1/12
H Y D R A U L I C L I N E A R A C T U A T O R
LA11
TABLE OF CONTENTS
1. GENERAL INFORMATION ............................................... p. 01
2. TECHNICAL SPECIFICATIONS and APPLICATION ........ p. 02
3. DESCRIPTION ................................................................. p. 03
3.1 General
3.2 Pump Unit ( )HRP11
3.3 Reservoir/Bypass Assembly
3.4 Steering Cylinder
4. INSTALLATION ................................................................. p. 05
4.1 Mechanical
4.2 Hydraulic
4.3 Electrical
5. NOTES ............................................................................. p. 07
6. DRAWINGS ..................................................................... p. 08
6.1 — Assembly Schematic LA11
6.2 — System Connection SchematicLA11
i
1. GENERAL INFORMATION
The Accu-Steer LA11 unit is a hydraulic linear actuator designed
to interface an autopilot system with a mechanical steering sys-
tems such as wire, cable or chain drives. A hydraulic linear ac-
tuator consists of a hydraulic drive unit (containing a pump unit,
bypass valve and reservoir assembly), a steering cylinder and the
interconnecting hoses.
One end of the cylinder is xed and the other end is connected to
a tiller arm or the mechanical quadrant, which is connected to a
rudder shaft. With this connection to a tiller arm the linear move-
ment of the cylinder is changed to rotary movement, which turns
the rudder and steers the vessel.
During normal mechanical steering, the hydraulic steering cylinder
strokes to port and starboard as the vessel is steered manually.
The oil in both sides of the cylinder ows back and forth through
a normally open bypass valve located in the linear actuator drive
unit. The steering cylinder is connected to the drive assembly with
two hoses (port and starboard). When the autopilot is switched into
the operating mode, the bypass valve is electrically closed. The
autopilot then drives the reversing hydraulic pump which in turn
operates the steering cylinder. See section 3 of this manual for a
more in depth description.
When the autopilot is operating, the cylinder with be turning the
rudder. The mechanical steering will be back-driven during this
time. The vessel’s steering wheel will be turning as the autopilot
makes corrections.
The Accu-Steer HRP11 11 is the reversing pump unit used in the LA
linear actuator. The output ow rate of the pumpset determines the
speed of the steering cylinder. The pump outputs 1.0 cu HRP11
in/sec or 16.4 cc/sec.
The BA150 X 9 is a balanced steering cylinder, which means the
volume of oil on both sides of the cylinder is equal. The volume of
this steering cylinder is 13 cu in (215 cc) of oil.
p01
Produktspecifikationer
| Varumärke: | Furuno |
| Kategori: | Inte kategoriserad |
| Modell: | LA11 |
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