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talk about steering gear system

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1-     steering gear system, telemotor, electro hydraulic, electric , ram type, vane type Steering gear with 4 ram, floating lever - Hunting gear arrangement with heleshaw pump( Constant speed unidirectional rotary variable stroke positive displacement) You can read about common problems of steering gear system at  the following link (Select the whole link address with right clip and  open link in new window) https://www.marineinsight.com/tech/common-problems-steering-gear-system-of-ships/ Safety devices for steering gear system 1-hunting gear, 2-buffer spring, 3-angle adjusting stop, 4-double shock valve, 5-relief valve, 6-tank level alarm( oil leak alarm), 7-overload alarm, 8-electrical failure, 9-hydraulic lock, 10- filter clog ,11- phase failure alarm, 8-servo loop alarm at electro hydraulic system( in case of different between rudder angle command & actual rudder angle) Steering clear (four ram types) The tiller is fixed to th...
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talk about bearing

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2- BEARING material   , Bearing damage cause Top end bearing - Crosshead engine – transmit load from cross head pin to connecting rod , allow relative movement of con rod and cross head pin , Trunk pistion engine - transmit load from gudgeon pin to con rod , allows relative movement of con rod and gudgeon pin Bearing lubrication - Gudgeon pin and Crosshead bearing Fluid -film lubrication depends on the fluid's viscosity, that is, its resistance to internal motion. This resis tance is due to cohesion of the molecules within the fluid; it occurs whenever there is internal motion, irrespective of whether or not this motion is caused by a change in the fluid's shape. A liquid adheres to the surface of a solid in contact with it. The motion of the solid at the interface causes internal motion in the liquid, which then resists the force acting on the solid. When a shaft rotates in a journal bearing with suitable running clearances, resistance to motion (or 'viscous d...
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