On section you should be able to identify and understand the
function of the main parts of the actuator housing
rotor
Stoppers
cover
radial bearing
rutter carrier
the actuator is situated on top of rather stock in the steering gear
compartment the rotor in the rotary vane actuator is mounted directly on the
rudder stock on the RAM type the tiller is fixed to the rudder stock the rudder
stock connects the actuator with a rudder
this is the rudder stock it is tapered on top to fit the rotor this is the
rotor it is mounted to the rudder stock by the use of a hydraulic jack these are
the bearings for the rotor upper and lower radial bearing and the rudder
carrier this is the actuator housing these are the stop herb mounting bars
these are the stoppers which serve a dual purpose together with the rotor
vanes the stoppers divide the actuator in two pressure chambers and also make
boundaries for the maximum rudder angle this is the lower packing gland this is
the base for the actuator this cover forms the top of the pressure chambers
this is the ring Jack it is used during installation to force the rotor onto the
rudder stock this is the rudder stock knot this is the mounting plate for the
angle indicator this is the angle indicator shaft this is the system oil
expansion tank this is the angle indicator wheel these nuts
lock down the cover stoppers and oil gasket with these the actuator is
complete please be aware that this sequence for putting the actuator
together is different from real life
click on the split drawing of the actuator for information about the
different parts
angle indicator
this is fixed to the rudder stock and shows the rudder angle
expansion tank
this tank serves as a for the system oil
rudder stock nut
this nut acts as a securing device for the friction connection between the
rudder stock and the rotor
Stoppers
make boundaries for the chambers and also set the limits for the
rudder angle to each side
Stoppers
make boundaries for the pressure chambers and also set the limits for the
rudder angle to each side rotor
this is the moving part of the actuator it turns the rudder stock when
the hydraulic pressure increases on either side of its veins it is fitted
with spring-loaded cast iron bars these are not exposed to wear
housing
serves as the outer boundaries side and bottom of the pressure chambers
rudder stock
this is the connecting shaft between the rotor and the rudder
lower radial bearing
the lower radial bearing takes up radial forces in conjunction with upper radial
bearing it is made of brass this bearing is lubricated by the system oil
lower packing gland
this keeps the system oil from leaking down the rudder stock after the system
oil has lubricated the lower side bearing and the rudder carrier
ring jack
this is used during installation to force the rotor onto the rudder stock
cover
the cover forms the chambers