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  • The ship's marine engines are considered to be the biggest engines on earth with

  • massive power to propel a heavy loaded ship. There are different parts of the

  • marine engine which helps the engine to rotate the crankshaft and propel the

  • ship from one port to another. Each component plays an important role in

  • powering and running a marine diesel engine but the engine cannot run unless

  • all components are in place and are in working condition. The main engine of a

  • seagoing cargo ships are usually two-stroke internal combustion engines .

  • The working of the two-stroke engine can be understood from this video for a

  • marine engineer or a professional working on ships it is vital to know

  • different engine parts and their function to operate and troubleshoot

  • when needed. You must have seen the engine inside the machinery room of the

  • ship covered and assembled with different other auxiliaries. Let's take

  • it out from its installation and only concentrate on the main engine to

  • understand its different parts, but before proceeding further please do

  • subscribe to our channel and press the bell icon to get notified when we post a

  • video. Looking at the exterior of the engine it comprises of the following Bed

  • plate- bed plate is the foundation block for two-stroke engine. It is built to

  • withstand the constant force from the engine but is also flexible enough to

  • handle constant fluctuations. A frame it is a fabricated steel structural element

  • of a slow-speed two-stroke diesel engine it stands on

  • the bedplate above the main bearings the a-frame carries the crosshead guides

  • and support the engine entablature also known as the cylinder block and

  • Entablature an entablature is a part of ships main

  • engine which houses the cylinder liner along with this scavenger space and

  • cooling water spaces. Turbocharger - Turbochargers are heat recovery

  • equipment helping to enhance the efficiency of the engine by supplying

  • fresh air they are located near the cylinder block check this video to

  • understand the turbocharger operation. Charge air cooler - charge air cooler is a

  • cooling arrangement for air supplied from the turbocharger before sending it

  • to the combustion chamber. It is usually located below the turbocharger and

  • adjacent to the scavenge space. Scavenge trunk - scavenge trunk is a space where

  • the cooled air from the charge air cooler is supplied for efficient

  • combustion. Cylinder head - It acts as a lid of the combustion chamber and

  • supports the exhaust wall and fuel injectors necessary for operation

  • Exhaust Vall - The exhaust wall helps to draw out the exhaust gases post the

  • combustion process. Know more about the functioning of marine engine exhaust

  • valve in this video. Exhaust trunk the exhaust drawn out of the exhaust wall is

  • then transferred to the exhaust trunk from where it strikes the turbine blades

  • of the turbocharger for heat recovery. It is located in between the cylinder head

  • and turbocharger unit. So these are the basic components which can be seen from

  • outside of the engine. Now let's dive inside the engine to understand

  • different rotating and moving parts that are involved in the propulsion process

  • that is the movement of the propeller. Liner it provides a durable and heat-resistant

  • combustion chamber preventing combustion products from escaping into the engine

  • itself. It is located at the top side of the entablature. Piston -- piston is used to

  • convert the force of expanding gasses into mechanical energy during the

  • process of combustion. It moves inside the liner and is connected to the cross

  • head by piston rod. Piston rings - it seal the piston therefore sealing the

  • combustion chamber preventing gases from leaking into the piston and surrounding

  • areas. Piston Rod -- it carries the piston and connects it to the crosshead

  • where the motion transfer takes place

  • Stuffing box - the crankcase is separated from the cylinder and scavenge space by a

  • diaphragm plate on a two stroke crosshead engine. The piston rod passes through a

  • stuffing box which is bolted into this diaphragm plate. The stuffing box

  • contains a series of scraper rings and sealing rings to seal and separate these

  • two spaces. Crosshead --A reciprocating block which usually slides in guides and

  • is the connecting point for piston rod and the connecting rod in a low-speed

  • two-stroke diesel engine. Connecting rod - The connecting rod is fitted between the

  • crosshead and the crankshaft. It transmits the firing force and together

  • with the crankshaft convert the reciprocating motion to a rotary

  • motion. Crankshaft -- It is the main component behind

  • transmitting power to the propeller shaft. The crankshaft on the large

  • modern two-stroke marine diesel engine can weigh over 300 tonnes they are too

  • big to make as a single unit and so are constructed by joining together

  • individual forging. Camshaft - The camshaft carries the cams which operates the fuel

  • pumps and exhaust valves. Because this operate once every cycle of the engine,

  • the camshaft on a two-stroke engine rotates at the same speed as the

  • crankshaft. Gear drive - Camshafts are driven either by gears or chains. In the

  • case of gear drive a train of gear wheel is fitted which transmits the drive from

  • the crankshaft to the camshaft.

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The ship's marine engines are considered to be the biggest engines on earth with


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船舶引擎部件及其功能(Marine Engine Parts and Functions #marine #engineparts #shipengine)

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    OolongCha 發佈於 2021 年 05 月 14 日