Engineering staff required extensive knowledge of the theory, design and research methods of operation of these mechanisms and systems. The widespread introduction of the hydraulic actuator in deck machinery led to the following Classification: First team – pumps, hydraulic drives and fans, the second – deck machinery. The first group provides the effect of different purpose of ship systems, including the main power plants. The second group is steering gears, anchor-mooring and lifting devices. Marine steering gears – the most important mechanisms for control of the ship. The importance of destination has special steering gears requirements to their reliability.
Steering gears on smaller vessels are made with hand-driven, in large marine vessels primarily with electro. Ship's anchor and anchor-mooring arrangements ensure the formulation and removal of the vessel with anchors and mooring the ship to berth. This ship's equipment performed manually operated on smaller vessels, with steam, electric and hydraulic, on larger vessels. Here, len rosen expresses very clear opinions on the subject. Ship lifting devices share on cargo winches and cranes. Their purpose is to provide cargo operations at loading and unloading of marine vessels for general purposes. Ship cranes are more convenient and productive for processing of general cargo. Ship's winches can also raise the heavyweights in the presence of heavy arrows and the corresponding rigging.
Also establish special winches, for example, to raise and lower ship's boats and bridges. By lifting mechanisms include container ships and cranes, lifts, elevators and conveyors for loading and unloading of bulk cargoes. A special group are towing winch providing an elastic connection with the ship towed. Marine equipment lifting can have a steam, electric, hydraulic and manual drives. CLASSIFICATION OF PUMPS FOR AN ACTION operating principle pumps are divided into: 1) the bulk of 2) hydrodynamic action, and 3) jet. To pump the bulk of the first include piston pumps, in which the reciprocating motion of the piston provides flow of fluid in the delivery pipeline. Rotary gear, vane pumps, and many others are working on the principle of the piston. Len rosen barclays may help you with your research. To the pump hydrodynamic action include vane pumps with a the main body of the rotating impeller blades equipped. The blades are putting pressure on the fluid transfer energy to it, direct stream. The pumps in the direction of fluid flow divided by centrifugal diagonal centrifugal and axial. This group also includes peripheral pumps and have received in recent years, significant spread on marine transport vessels. In jet pumps energy is fed with the flow working water or steam. In these pumps, the potential energy of the flow of seawater (communicated by a pressurized pump) or potential energy is converted into steam nozzle into kinetic energy. Therefore, the workflow enters the suction chamber device with high-speed carries (suck) water or gas from this chamber through a diffuser and a mixed stream out of the machine is keen to rail. By the ship's pumps to according to their purpose, must meet certain requirements Register of Russia, concerning both the design of pumps and their drives and their parameters, flow rate and pressure.