Operation of Fuel Injector and Rotary Vane Steeering Gear

8/13/2019 Operation of Fuel Injector and Rotary Vane Steeering Gear

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COURSE WORK ON MARINE DIESEL

ENGINE

Module Name: Marine Design and

Technology

Module Code: 5070ENG

ISSUE DATE: 04/11/13

SUBMISION DATE: 29/11/13

Ella David Inalewgu

Student ID: 670432


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Q1.0: using the solid works drawing that you produced during semester 1

design week, describe the operation of a fuel injector filted on a medium

marine diesel engine.

Introduction

Fuel injector is a vital part of diesel engine as it provides fuel in a good

condition for combustion to take place at the right time. Fuel injector consists

of two main parts, the nozzle and the body. The fuel is measure by means of

timing the delivery and the atomisation of the fuel.


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Operation of fuel injection

Figure1

NB: The diagrams using the solid works to draw the fuel injector system are

yet to be completed

From the diagram above, when fuel enters and moves down in a

surrounding in a body at a very high pressure and then travels down into a

nozzles passage and finally goes down into a passage in a needle valve, there

is a vertical spindle that is spring loaded which holds the needle valve on a

mitred seat with a pressure of about 140bar will lift the nozzle when the preset

pressure reaches its value, before it will allow the fuel to be injected into the

cylinder.

When the fuel pressure acting on the needle as to overcome the

compression spring, the needle valve will open and the fuel will then flows into

the lower chamber and forced out through a series of small holes in the nozzle

to form a fine spray in engine combustion chamber. As the timing valve cuts


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off the fuel supply, the needle valve will shut immediately under the spring

compression force.

Reference;

D.A Taylor(1996) Introduction to Marine EngineeringReverse secondedition Reed Educational and professional publishing 0 7506 2530 9

R.S. Khurmin,J.K. Gupta(1978) Thermal engineering FirstEditionR.S.Khurmi & J.K Gupta 81-219-25738

H D McGeorge(1995) Marine Auxiliary Machinery 7thEditionButterWorth-heinemann 0 7506 1842 4

http://www.brighthubengineering.com/marine-engines-machinery/53000-how-steering-gears-work-on-ships/

http://www.machineryspaces.com/fuel-injector.html
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Q2: Rotary vane steering gear:

Introduction

Steering gear allows the rudder to moves as it receives respond from thebridge. The whole system comprise of three parts, power unit, control

equipment and transmission of rudder stock. It works when ship is moving and

not when it is stationary. Most of the ships are provided with steering gear, an

auxiliary steering gear. All modern ship uses a steering gear system which is

fully electrical, hydraulic and electro-hydraulic.

Figure2

Construction of rotary vane steering gear:

From figure2 above, Rotary vane steering gear system are made up of two

parts, the rotor and the stator. The rotor is the moving part and is key to the

ruder stock. The rotor has vane that is projected radially outwards into thesurrounding that is formed by the stator vanes. The stator (static part) is of


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cylindrical casing, it has three internal vanes that is projected radially inwards.

Steel sealing trips are filted on the moving faces. A relief valve is filted to

prevent excess pressure from the system. The vanes are made up cast iron

which is secure to the iron rotor and stator. The strength of the rotor depends

on the key filted full length of the rotary vane. it also has compact actuatorinside a close housing .

The two anchor bolts which are held in a fixed bracket with runner stock-

absorbing sleeves prevent the rotation of the gear. The outer bolts are of cast

iron bushes which prevent wear from the steering flange. When the oil

manifold grooves have been machined, is then the bottom and stator flanges

will be welded.

Reference

http://www.brighthubengineering.com/marine-engines-machinery/53000-how-steering-gears-work-on-ships/

http://alsafeenah.com/Uploads/CategoriesDetail/13c1e04d-c2cb-4da3-b358-37df4c619376.pdf

H D McGeorge(1991) General Engineering Knowledge Third EditionButterworth-Heinemann Ltd 0 7506 00063

http://alsafeenah.com/Uploads/CategoriesDetail/13c1e04d-c2cb-4da3-b358-37df4c619376.pdfhttp://alsafeenah.com/Uploads/CategoriesDetail/13c1e04d-c2cb-4da3-b358-37df4c619376.pdfhttp://alsafeenah.com/Uploads/CategoriesDetail/13c1e04d-c2cb-4da3-b358-37df4c619376.pdfhttp://alsafeenah.com/Uploads/CategoriesDetail/13c1e04d-c2cb-4da3-b358-37df4c619376.pdfhttp://alsafeenah.com/Uploads/CategoriesDetail/13c1e04d-c2cb-4da3-b358-37df4c619376.pdfhttp://alsafeenah.com/Uploads/CategoriesDetail/13c1e04d-c2cb-4da3-b358-37df4c619376.pdfhttp://alsafeenah.com/Uploads/CategoriesDetail/13c1e04d-c2cb-4da3-b358-37df4c619376.pdf


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figure3

Operation of rotary vane steering gear:

From figure3 above, in the rotary steering gear the rotor moves in a housing

that are attached to the ships structure. There are chamber which are formed

between the vanes on the rotor and the vane in the housing, this chamber are

connected to the separate pipe system on either side of the moving vanes. The

rudder stock turn anti-clockwise (i.e. the rudder will turn to starboard) when

hydraulic fluid is supply to the left of the moving vane and drawing fluid from

the entire chamber on the right. it turn clockwise(i.e. the rudder will turn to

port side) if pressure and suction are reverse. Angular movement of 70degree(that is 35degree in each direction) are usually permitted by three vanes.

Delivery pump supplied the hydraulic fluid and is control by electrical.

Reference

http://alsafeenah.com/Uploads/CategoriesDetail/13c1e04d-c2cb-4da3-b358-37df4c619376.pdf

A.Tayor(1996) Introduction to Marine Engineering Reverse secondedition Reed Educational and professional publishing 0 7506 2530 9


Q 3.0 in no more than a couple of paragraphs for each,

explain the function of the following maritime

organisations;

International maritime organisation(IMO) Classification societies(such as Lloyds Register of Shipping) Maritime and Coastguard Agency (MCA)
http://alsafeenah.com/Uploads/CategoriesDetail/13c1e04d-c2cb-4da3-b358-37df4c619376.pdfhttp://alsafeenah.com/Uploads/CategoriesDetail/13c1e04d-c2cb-4da3-b358-37df4c619376.pdfhttp://alsafeenah.com/Uploads/CategoriesDetail/13c1e04d-c2cb-4da3-b358-37df4c619376.pdfhttp://alsafeenah.com/Uploads/CategoriesDetail/13c1e04d-c2cb-4da3-b358-37df4c619376.pdfhttp://alsafeenah.com/Uploads/CategoriesDetail/13c1e04d-c2cb-4da3-b358-37df4c619376.pdfhttp://alsafeenah.com/Uploads/CategoriesDetail/13c1e04d-c2cb-4da3-b358-37df4c619376.pdfhttp://alsafeenah.com/Uploads/CategoriesDetail/13c1e04d-c2cb-4da3-b358-37df4c619376.pdf


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FUNCTION OF INTERNATIONAL MARITINE ORGANISATION (IMO)

Is the United Nations agency which ensures safety and security of shipping,

and prevention of marine pollution. IMO has about 170 member state and

three associate member, is also specialise agency of unite nation.The IMO's primary responsibility is to improve and maintain a comprehensive

regulatory framework forshippingand its law today includes safety,

environmental concerns, legal matters, technical co-operation, maritime

security and the efficiency of shipping.IMO have administration, inspector and

a team of survey to inspect and monitor the ship that does not comply with

the rules.

Reference :

http://www.imo.org/About/Pages/Default.aspx

http://en.wikipedia.org/wiki/International_Maritime_Organization

http://www.gobookee.org/get_book.php?u=aHR0cDovL3BvbW9yY2kuY29tL0V

kdWthY2lqYS84MC0xMDAvQmFzaWNzJTIwb2YlMjBQb3J0JTIwU3RhdGUlMjBD

b250cm9sJTIwKFBTQykucGRmCldoYXQgaXMgUFNDPyAtIFNhanQgemEgUE9NT

1JDRSBJIE5BVVRJxIxBUkU=

FUNTION OF CLASSIFICATION SOCIETIES

This is an organisation responsible for maintenance of technical standards for

construction and operation of ships and offshore structures. The society

ensures that any ship build will be according to the standard.

Classification society has technical rules, which make sure that design and

calculation meet th standard, survey vessel to make sure they continue tomeet the rules, surveying of ship and structure during the construction and

also commissioning.

Reference; en.wikipedia.org/wiki/classification_ society

Port state control

This is the inspection carrying out on a foreign ship into a national ports toconfirm that the ship coming a country is in a good condition, has good
http://en.wikipedia.org/wiki/International_Maritime_Organizationhttp://en.wikipedia.org/wiki/International_Maritime_Organizationhttp://en.wikipedia.org/wiki/International_Maritime_Organizationhttp://www.imo.org/About/Pages/Default.aspxhttp://www.imo.org/About/Pages/Default.aspxhttp://en.wikipedia.org/wiki/International_Maritime_Organizationhttp://en.wikipedia.org/wiki/International_Maritime_Organizationhttp://en.wikipedia.org/wiki/International_Maritime_Organizationhttp://www.imo.org/About/Pages/Default.aspxhttp://en.wikipedia.org/wiki/International_Maritime_Organization


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equipment and comply with the international regulation requirement and also

manned and operated in compliance with the rules.example;solas,STCW e.t.c.

The role of of Maritime Coastguard Agency(MCA) is to ensure high standards

of safety at sea, minimising loss of life amongst seafarers, responding to

maritime emergency 24hours a day and protect the environment byminimising pollution from ships. Some flag state are sailing in an unsafe

condition therefore putting the lives and marine environment at risk, port

state control set standard for inspection procedure and design ,that this

standard must meet the requirement before designing a ship.

Reference;

http://wwwwww.dft.gov.uk/mca/1._role_of_mca-4.pdf

.imo.org/OurWork/Safety/Implementation/Pages/PortStateControl.aspx

http://en.wikipedia.org/wiki/Port_State_Control

http://www.gobookee.org/get_book.php?u=aHR0cDovL3BvbW9yY2kuY29tL0V

kdWthY2lqYS84MC0xMDAvQmFzaWNzJTIwb2YlMjBQb3J0JTIwU3RhdGUlMjBD

b250cm9sJTIwKFBTQykucGRmCldoYXQgaXMgUFNDPyAtIFNhanQgemEgUE9NT

1JDRSBJIE5BVVRJxIxBUkU=
http://www.imo.org/OurWork/Safety/Implementation/Pages/PortStateControl.aspxhttp://www.imo.org/OurWork/Safety/Implementation/Pages/PortStateControl.aspxhttp://www.imo.org/OurWork/Safety/Implementation/Pages/PortStateControl.aspxhttp://www.imo.org/OurWork/Safety/Implementation/Pages/PortStateControl.aspxhttp://www.imo.org/OurWork/Safety/Implementation/Pages/PortStateControl.aspxhttp://en.wikipedia.org/wiki/Port_State_Controlhttp://en.wikipedia.org/wiki/Port_State_Controlhttp://en.wikipedia.org/wiki/Port_State_Controlhttp://www.imo.org/OurWork/Safety/Implementation/Pages/PortStateControl.aspxhttp://www.imo.org/OurWork/Safety/Implementation/Pages/PortStateControl.aspx

Operation of Fuel Injector and Rotary Vane Steeering Gear

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