Rudders turn a ship as and when required. Rudders are the principal system for the motion and control of the vessel. But we must remember that the rudder action is dependent on another pivotal system called the Steering Gear. Steering Gear integrated with the rudder system defines the ‘turning mechanism’ for every ship irrespective of size, type and operation.
ATZ with our partner Aegir Marine have the parts, service and experience to overhaul many Steering Gear types.
There are certain requirements that must be met by steering gear. These basic requirements to be invariably met by all steering gears are guided by rules set out by classification societies. They can be briefly defined as:
The main control of the steering operations is given from the helm of the ship. The ‘control force’ for turning is triggered from the wheel at the helm, which reaches the steering gear system. The steering gear system then generates a torsional force which is then, in turn, transmitted to the rudder stock that turns the rudder.
The rudder system generally consists of the following pieces of equipment
Different steering gear types have different maintenance requirements but the typical planned maintenance for a rotary vane type arrangement would be:
Five-year maintenance (often described as a minor overhaul):
10-year maintenance (often described as a major overhaul)
ATZ with our partner Aegir Marine have extensive experience with most steering gear types are in position to meet your parts and service needs.
Yes, the equipment can be accessed from the steering gear machinery space inside the vessel. Consideration must be given to the its connection to the rudder itself and make sure that the rudder rotation is in control
Excessive noise and vibrations from the steering gear may indicate entrapment of air in the system. Due to the air bubbles in the oil, pumps and pipework are subjected to air hammer leading to vibration and noise.
SOLAS states that the system must be capable of 35 degrees on one side to 35 degrees on the other side, at its deepest seagoing draught and running at maximum ahead service speed. It may happen that the maximum angle reached by the rudder is less or the rudder is overshooting the 35-degree angle limit.
One of the main reasons for this problem is a malfunction of the limit switch fitted on the repeat back unit or on the auto pilot. Replace the malfunctioned limit switch or adjust the limit switch to the correct maximum rudder angle limit.
Our team of technical experts offer industry-leading consultation services, equipment sales and support and with a wealth of project management and technical experience, we plan and deliver. We work with you to ensure a smooth project from design specification to onsite installation. Our impartial guidance and multi-supplier approach mean we are focused on finding you the best solution meaning you can be confident in both our services and products.
Talk to us today Download Brochure
