Marine machinery

Marine machinery

All machinery installed on waterborne craft, including engines, transmissions, shafting, propulsors, generators, motors, pumps, compressors, blowers, eductors, centrifuges, boilers and other heat exchangers, winches, cranes, steering gear, and associated piping, tanks, wiring, and controls, used for propulsion, for ship services, and for cargo, trade, or mission services.

Practically all marine machinery elements have nonmarine counterparts; in some cases, the latter were developed from marine applications, while in other cases specific equipment was “marinized.” For marine service, machinery may have to meet higher standards of reliability and greater demands for weight and volume reduction and access for maintenance. Marine machinery must be capable of withstanding the marine environment, which tends toward extreme ambient conditions, high humidity, sea-water corrosion, vibration, sea motions, shock, variable demand, and fluctuating support services. Even higher standards may apply for warship machinery. To improve system reliability, essential equipment may be fitted in duplicate or provided with duplicated or alternative support or control systems, while nonessential equipment may be fitted with bypasses, to permit continued operation of a system following a component failure. Isolation valves or circuit breakers are common, enabling immediate repair.

Machinery on modern ships is highly automated, with propulsion usually directly controlled from the wheelhouse, and auxiliary machinery centrally controlled from an air-conditioned, sound-proofed control room, usually in the engine room. In the typical modern merchant ship (but not in passenger ships), the machinery operates automatically, and the controls are unattended at sea, with engineers called out by alarm in the event of malfunctions.

Propulsion machinery comprises an engine, usually a diesel engine, steam turbine, or gas turbine, with required gearing or other transmission system, and, for steam plants, steam generators. See Marine engine, Propeller (marine craft)

References in periodicals archive ?
TOKYO, Dec 12, 2017 - (JCN Newswire) - Mitsubishi Heavy Industries Marine Machinery & Equipment Co.
Bridge has facilities for melting metal and resizing it into required shapes as well as for automotive engineering relating to repairing land and marine machinery and overhauling old engines.
Mitsubishi Heavy Industries Marine Machinery & Engine Co (MHI-MME), a group company of Mitsubishi Heavy Industries, has signed a licensing agreement with Changzhou Zhonghai Marine Propeller Co.
Mitsubishi Heavy Industries, Ltd (MHI) has announced the organization of a company dedicated to the handling of marine machinery and marine diesel engine business as of October 1, 2013.
Via the deal Palfinger aims at expanding into the marine machinery sector.
99 billion yen on good sales of industrial engines, aerospace equipment as well as marine machinery.
Generally, these are used on larger mobile and marine machinery, such as large excavators and road planers.
It resembled plastic fishnet that could trap sea animals or entangle in craft propellers and other marine machinery.
The technology group Wartsila and Mitsubishi Heavy Industries Marine Machinery & Equipment Co.
This further broadening of Jiangsu Masada's product lineup will expand the market share for marine machinery utilizing MHI group technologies in China, the world's largest market for marine vessel construction.
Since 1981, BLM has been jointly manufacturing marine equipment, including deck cranes, mooring winches, and windlasses for cargo and container vessels, with Wuhan Marine Machinery Plant (WMMP), located in Hubei Province, China.
TOKYO, Apr 13, 2016 - (JCN Newswire) - The newly developed waste heat recovery system "HydrocurrentTM Organic Rankine Cycle (ORC) Module 125EJW"(1) by MHI Marine Machinery & Engine Co.

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