Marine Online
The learning objectives of this section
are to be acquainted with the many
lubricating oil applications such as
compressor oils system and cylinder oils
in low-speed crosshead diesel engines
medium and high speed these legends gear
oils hydraulic oils turbine oils grease
application and dressed protection have
a pleasant lesson please click the
illustrations to learn more that the
subject positive displacement
compressors can be piston compressors
like start air compressors cargo
compresses and refrigeration compressors
or they can be of the rotary type
compressor reciprocating air compresses
need lubricating oil with the following
properties low carbon forming tendencies
resistance to oxidation MP wear
properties give protection against
corrosion synthetic lubricants are
commonly used when reciprocating
compressors are used to compress gas for
example hydrocarbon gas or lpg vater
specialized lubricants give you quiet
you be
against for refrigeration compressors
need to have the following properties
stable at the elevated temperatures
suitable low-temperature properties
lopor point and wax depositing tendency
there are two main types of positive
displacement rotary compressors the
sliding vane and rotary screw lubricant
servatory compressors need to have the
following properties efficient cooling
medium feeling of the moving parts
excellent oxidation stability good water
separating properties the crosshead
engine has two separate lubricating
systems the crankcase or system oil
circuit is supplemented by a separate
cylinder coil system the system oil
lubricates the day rings and in many
designs calls the Pistons a true
union has one lubricating system this
system is serving the need for
lubricating all part for the engine as
well as cooling the trunk piston oil
system like the crosshead engine system
is including separators and filters to
keep the oil clean and so prevent costly
oil changes the main functions of a
diesel engine lubricant are reduce we're
cooling cleaning feeling protection
against corrosion in a working engine a
lubricant is subject to high operating
temperatures advocaten contamination
from various sources and heavy loads
selection of correct
so should give an acceptable equilibrium
BM in the engine
there must be a balance between the
neutralization of salsa in the fuel and
topping up note that engines of flame
rings or auntie polishing rings tend to
have a very low oil consumption the
viscosity of diesel engine oils are
normally specified as fa e grades
leaking oil coolers and cylinder calling
jackets along with the condensation or
promote places of water in the
lubricating system the cause of water
contamination should always be traced
and preventive action taken immediately
or in condition guidelines viscosity
increase is caused by oxidation in
soluble build up the end decrease is
caused by sulfuric acid oxidation assets
in soluble increases it caused by search
asphaltenes caso4 water content is
caused by combustion coolant leaks the
functions of a gear lubricant are to
lubricate by reducing friction and wear
by separating surfaces of the liquid or
solid film too cool
by removing heat generated by friction
churning winding and from
still forces to protect against ingress
of dirt and contaminants and against
corrosion requirements and properties of
a gear lubricant no temperature
performance she is stability
hi server oxidative stability superiors
feel compatibility faux mink Deimos
ability the gear oil
normally selected by the game
manufacturer some gear
sales can be sensitive to contamination
causing fledge formation emotion foment
accenture hydraulic oil and fluids and
the pressure or emotion are often and
advantageous alternative to mechanical
or electrical means of transmitting
energy many different types of hydraulic
fluids have been developed in accordance
of the development of new components and
changing requirements mineral oil based
fluids are still the most common type of
hydraulic median the table shows the
classification of hydraulic fluids
according to iso 673 for and di m51
title to quality requirements the
hydraulic oils satisfactory flow
properties high viscosity index low
compressibility good lubricating
properties low vapor pressure
compatibility with sister materials
chemical stability protection against
corrosion rapid a release and water
separation good thermal conductivity
fire-resistance desirable hydraulic
equipment have used in a wide area of
applications the systems can be
classified as high or low pressure
systems
I think it's not any distinct limit
between them a great advantage of
hydraulic system is that you can use
heavy energy consumers in areas with a
high risk of fire or explosion typical
hydraulic systems are steering gears of
the piston or rotary bein types
cargo handling gear like cranes ramp
valve actuators and pumps deck equipment
including hatch covers and winches
special tools elevators clusters in
general we have three types of turbines
on board mainly steam turbines for
propulsion to buy generators and turbine
driven pumps gas turbines for propulsion
and emergency generators exhaust gas
turbines steam turbines
are generally operating in to clean
conditions the lubricating oil system
incorporates Lhota driven pumps for
starting and emergency backup filters
coolers and tax lubricating of gas
turbines is normally by means of the
pressure circulating system and for
geared turbines a common system is used
for both gears and bearings a separate
circulating system may be used for
supplying oil to the bearings of the
compressor the hydraulic governor gear
will normally use same grade of oil of
the turbine exhaust gas turbines may
look very similar but they can also be
divided into two types one type has
roller bearings and the other type has
white metal plain bearings the outdoor
roller bearing tight provides a higher
mechanical efficiency and are also
claimed to withstand the short term of
oil failure a close lubricating system
is used for the bearings and the
recommended lubricant is turbine oil
turbocharges with playing inboard
bearings are normally lubricated by the
engines system or oil turbine oils are
specially formulated to satisfy the
demanding requirements of modern high
output turbines and the large reduction
gears found marine applications they are
blended from highly defined mineral oils
of turbine quality quality requirements
of turbine oils are antioxidant and
ample rest additives excellent the
miscibility and resistance to filming
ability to release entrained air quickly
grief for the lubricant it's probably
the first type of lubricant used by
mankind today this is a complex
technology with a complex range of
various products oils have been mixed
with other ingredients to follow
gel-like material Greece's have the
advantage that they came to stay with
their put grease consists of three main
ingredients base oil additives sickness
property
required a good grease our ability to
slow consistency mechanical stability
dropping point oil separation
compatibility with other greases the
most ability water resistance corrosion
protection advantage of using grease our
suitability for field for life bearings
easy retention of lubricant protection
and feeling cleanliness disadvantage of
using grease our poor cooling capability
contamination speed and temperature
limitations reduce duplication
efficiency oil should be used wherever
possible when should be lubricated with
grease could be decreased ripping and
scattering of lubricant to decrease
frequency of lubrication to feel out
contaminants for intermittent operation
to suspend solid additives when extreme
operating conditions exist like high
temperatures high pressure shock loading
low speed combined at high pressure when
noise reduction is important the most
important than typical application of
Greece's is for the lubrication of bored
or other type of rolling bearings about
ninety percent of all rolling bearings
can be lubricated with grease other
important applications include open and
enclosed gears we're loyal is not the
preferred choice wire ropes playing
their wings with no speed and high load
universal joints board and constant
velocity joints
pins shackles linkages hinges bushes
cams treads chains and cables couplings
the requirements to open gears and no
different from those enclosed gears but
the reason additional lead for the
lubricant to stay in place
greece is often used for small field for
life boxes police is normally applied
with the dispensing system like grease
guns of various types it is important to
keep the grease free from dirt and
contaminants contaminants captain the
grease with stay there into the greased
it removed and renewed board bearings on
electric motors or other fast turning
equipment should be carefully greased
avoiding all the lubrication as this can
lead to overheating and failure of the
day link as with all of the type of
lubricants Greece should be stored away
from excessive heat or cold when a drum
or pale of Greece's opened care should
be taken to avoid foreign matters to
enter the remaining content a protective
cover of plastic on top of the remaining
product can help