CHAPTER 6

STEERING GEAR

WORDS AND EXPRESSIONS

steering gear	рулевая машина
rudder	- руль
in response to	- в ответ на
rudder stock	- баллер руля
to convey	• передавать
desired rudder angle	- заданный угол руля
force	• сила
by means of	- при помощи, посредством
to accomplish	- достигать, завершать
telemotor	телемотор
in turn	• по очереди (в свою очередь)
delivery pump	нагнетательный насос
to employ	- использовать
transmitter	- передающее устройство
receiver	- принимающее устройство
charging unit	зарядное устройство, зд: силовой блок
non-freezing fluid	- незамерзающая жидкость
remote control	дистанционное управление
installation	установка
since	поскольку, так как
simple	простой
reliable	надежный
ram	плунжер
rotary vane steering gear	роторнолопастная рулевая машина
tiller	румпель
crosshead	ползун
replenishing tank	танк запасного масла
shown dotted	показанный пунктирной линией
pump isolating valve	секущий клапан насоса
steel buttresses fitted around -base of bedplate to take shear	стальные ребра жесткости, установленные вокруг фундамента, предохраняющие болты
of holding down bolts	крепления
rudder indicator	- индикатор руля
spring loaded return linkage	- подпружиненная обратная связь
crossbar,	- поперечина, ригель
typical elevation of trunnion-	обычная проекция румпеля с цапфенным со­
type tiller	единением
cylinder chocks	фундаментальные башмаки
rudder carrier	- подтяжник руля
securely	прочно, надежно
to fasten	прикреплять
housing	кожух
to attach	прикреплять
to comprise	включать, содержать
Ward-Leonard system	- система дам ач ель - генератор (система с
	регулируемым напряжением)
Direct single Motor System	- система прямой передачи от двигателя
via	-через
pinion toothed quadrant	- шестерня - зубчатая рейка
changeover	- переход, зд: переключение
prior to	-до
departure	- отход
with respect to	- относительно
actual	- фактический
full travel	- полное перемещение
visually	- визуально

 

TEXT

The steering gear provides a movement of the rudder in response to a signal from the bridge. The system consists of three parts control equipment, a power, unit and a transmission to the rudder stock. The control equipment conveys a signal of desired rudder angle from the bridge and activates the power unit and transmission system until the desired angle is reached. The power unit provides the force to move the rudder to the desired angle By means of the transmission system and the steering gear the movement of the rudder is

accomplished. The steering gear can be arranged with hydraulic control equipment known as a telemotor or with electrical control equipment. The power unit may in turn be hydraulic or electrically operated. A delivery pump is required in the hydraulic system.

Telemotor control is a hydraulic control system employing a transmitter, a receiver, pipes and a charging unit. The transmitter is located on the bridge and the receiver is mounted on the steering gear. The charging unit is located near the receiver and the system is charged with a non-freezing fluid.

The electrical remote control is commonly used in modem installations since it uses a small control unit as transmitter on the bridge and is simple and reliable in operation.

Two types ofhydraulically powered transmission unit or steering gear are in common use: the ram and the rotary vane. There are a two-ram and a four-ram steering gear.

With the rotary vane type of a steering gear a vaned rotor is securely fastened onto the rudder stock. The rotor is able to move in a housing which is solidly attached to the ship's

structure.

There are steering gears which comprise electrical control, electric power unit and electrical transmission. They may be of two types: the Ward-Leonard System and the Direct Single Motor System. Both types have a geared down motor drive via a pinion to a toothed quadrant. To meet the automatic changeover within 45 seconds twin system steering gears are used. The failure of one system results in a changeover to the other. Prior to a ship's departure from any port the steering gear should be tested to ensure satisfactory operation.

These tests should include;

1. Operation of the main steering gear.

2. Operation of the auxiliary gear.

3. Operation of the remote control (telemotor) system or systems from the

main bridge steering positions.

4 Operation of the steering gear using the emergency power supply. 5. The rudder angle indicator reading with respect to the actual rudder

angle should be checked.

6. The alarms fitted to the remote control system and the steering gear power units should be checked for correct operation.

The rudder should be moved through its full travel in both directions The various equipment should be visually inspected for damage or wear. The communication system between the bridge and the steering gear compartment should also be operated. (2400)