Types and differences of marine steering gear

Marine steering gears are mostly electro-hydraulic, that is, hydraulic equipment is remotely operated by electric equipment. There are two types: One is the reciprocating plunger steering gear, the principle of which is to generate linear motion through the conversion of high and low pressure oil and convert it into rotary motion through the tiller. The other is a rotary vane steering gear, the principle of which is that high and low pressure oil directly acts on the rotor, which is small in size and efficient, but at a higher cost.

The difference between the two types of steering gears: the reciprocating plunger type steering gear has the upper rudder bearing for the load-bearing rudder system, and the lower rudder bearing for positioning, and the pressing amount of the tiller is only a few millimeters; while the rotary vane steering gear does not require the upper rudder bearing. The steering gear directly bears the weight, but the water tightness of the steering gear platform needs to be considered, and the pressing amount of the steering gear needs to be tens of millimeters. The reciprocating plunger steering gear has larger requirements on the size. The reciprocating plunger steering gear can deflect less than 40° to one side, and the rotary vane steering gear can reach 70°. The role of the hydraulic system is to convert between high and low pressure, converting pressure loss into mechanical motion. Including 1. High pressure pump set (provide pressure oil) 2. Control and operating equipment 3. Actuating mechanism (oil motor, cylinder plunger, etc.).