Operation Of A Hydraulic Steering System - Ultraflex UP 18 Manuel D'installation Et De Maintenance

1 - PRODUCT DESCRIPTION

1.1 Operation of a hydraulic steering system

The hydraulic systems
A.B.Y.C. standards P21.
The steering systems
-18°C (0°F) and +77°C (+170°F), all of their components were specifically manufactured for the
marine environment, using materials and applying processes that offer great durability and safety
even in extreme conditions.
The hydraulic steering system mounted on a
boat schematically consists in:
• a pump placed on the dashboard;
• a cylinder positioned at the stern and
connected to the motor or to the helm;
• pair of connection hydraulic hoses (see
figure).
The rotation of the steering wheel causes
the pumping of the oil that, depending on the
direction of rotation, flows into the cylinder
through the hoses.
The consequent movement of the cylinder
makes the oil flow towards the pump through
the hoses and at the same time moves the
engine or the helm of the boat connected to
the cylinder itself.
The pumps are equipped with a non-return
valve, which has the function of preventing the
flow of oil to the pump if the latter is not running. In unbalanced cylinders the two chambers have
different capacities, and therefore require, considering the same displacement in the two directions,
a different number of turns of the steering wheel and a different rotation torque on the steering
wheel. The balanced cylinders require the same number of turns of the steering wheel to move the
helm from the centre to the end of stroke in the two opposite directions.
A balanced and easily manoeuvrable steering system requires a proper choice of the type of pump
to be coupled to the cylinder.
rate (cm3 of oil handled at each turn of the steering wheel) and for the type of installation. While
choosing the pump you must consider the capacity of the cylinder: the number of steering wheel
turns from left to right is in fact determined by the ratio between the volume of the cylinder and the
pump flow.
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PUMP FOR HYDRAULIC SYSTEMS
are designed in accordance with UNI EN ISO 10592 rule and
are able to operate in an ambient temperature ranging between
pump
builds different models of pumps, which differ for the flow
Installation and Maintenance Manual
motor
hydraulic hoses
cylinder
example of application