Different types of steering gear from Deyuan marine

Different types of steering gear from Deyuan marine

The steering gear is a large deck machinery on a ship. It is a device which can turn a rudder and maintain the rudder position.

As the ship's speed and registered tonnage continue to increase, the rudder torque acting on the rudder stock is greatly increased, so it is necessary to use the steering gear to provide the driving force.

The size of the steering gear is determined according to the rules of the classification society. When selecting type, it mainly considers torque (kN/m). 

There are two key points in the design work:

1. The host in MCR (maximum continuous stable condition) state, the rudder angle from one side of the 35° to 30 °  on the other side, need to be completed within 28sec.

2. The calculation of the rudder rod is the determination of its diameter.

According to its power source and drive method, generally divided into human steering gear, Manpower steering gear, steam steering gear, electric steering gear and hydraulic steering gear. The ship currently USES electric steering gear and hydraulic steering gear.

The electric steering gear is composed of motor, worm gear, worm, rudder tiller fan, etc., it has the advantages of simple structure, convenient operation, reliable work, suitable for small and medium sized ships.

Hydraulic steering gear, or the the electro-hydraulic steering gear is the most widely used type on the ship now. That is, the the hydraulic equipment is operated by remote control according to the electric equipment. It mainly composed of motor, pump, piping and other mechanical components. It has the advantages of small size, light weight, large torque, low noise and easy to drive translation management, which is the large ship steering gear.

The electro-hydraulic steering gear can be divided into piston and rotary vane type . 

1. Reciprocating plunger type steering gear(74000DWT bulk wheel), the principle is the conversion of high and low pressure oil work produce linear motion, and through a conversion into rotary motion.

2. Rotary vane type steering gear (marine chemicals), the principle is the high and low pressure oil directly acting on the rotor, small volume and high efficiency, but the cost is high.

Deyuan marine can offer wide range of steering gear according to your requiremnt. All our steering gears system are in compact design, light weight, simple installation and maintenance and certified by ABS, RINA, LR, DNV, BV, BKI, etc.