Transcript 01 - Pomorski fakultet u Splitu

Tomislav Skračić, MA
Undergraduate English
Course for
MARINE ENGINEERS
3rd Semester
Essential reading:
SPINČIĆ, A., PRITCHARD, B, An English Textbook For
Marine Engineers 2., Pomorski fakultet, Rijeka 2009.
LUZER, J., SPINČIĆ, A., Gramatička vježbenica engleskog
jezika za pomorce, Pomorski fakultet, Rijeka 2003.
Marine diesel engine – cross section
Lesson 1
Cylinder and Crankcase
KEY WORDS
crankcase (n.)
bore (n.)
liner (n.)
cooling water jacket
cast iron
casing (n.)
overhaul (n.)
cylinder casting
fairly
withstand (v.)
stress (n.)
resistance (n.)
heat flow
- kućište koljenaste osovine
- provrt, promjer cilindra
- košuljica cilindra
- vodeni plašt
- lijevano željezo
- kućište
- remont, temeljiti popravak,
tehnički pregled, 'klasa'
- kućište / blok cilindra
- poprilično
- izdržati, podnijeti
- naprezanje, opterećenje
- otpor
- strujanje topline, odvod topline
Lesson 1
Cylinder and Crankcase
KEY WORDS
cylinder head
- glava cilindra
cylinder cover
- poklopac cilindra
stud (n.)
- usadni vijak, 'pržunjer'
nut (n.)
- matica
gas-tight seal
- plinonepropusna brtva
tensile load
- vlačno opterećenje
entablature (n.) = under piston space - gornji dio stalka motora
articulated
- sastavljen od dijelova, zglobno spojen
jack bolt
- vijak glave motora
tie bolt
- kotveni vijak
thrust bolt, tie bolt
- vijak temeljnog ležaja preopterećen na tlak
tie rod
- kotvena šipka koja uzdužno
spaja sve komponente
Lesson 1
Cylinder and Crankcase
KEY WORDS
bearing (n.)
- ležaj
bedplate (n.)
- temeljna ploča
column (n.)
- stalak
column (n.) = guide shoes for the cross-head
- klizna staza križne glave
frame (n.)
- okvir, postolje
gas pressure
- tlak plinova
steel member
- čelični dio
compression (n.)
- kompresija, pritisak
crankshaft (n.)
- koljenasta osovina, radilica
multi-throw shaft
- višecilindarska koljenasta osovina
low grade fuel
- gorivo loše kvalitete
Lesson 1
Cylinder and Crankcase
DEFINITION OF A FRAME
The engine load carrying part that includes:
 cylinder block
 crankcase
 bedplate (or base)
 sump (or oil pan)
 end plates
Cylinder and Crankcase
DEFINITION OF A CYLINDER BLOCK
A cast iron casing which encloses / houses cylinder liners
and supports heads.The heads are tightly secured by
studs and nuts to the cylinder block.
Crankcase - DEFINITION
The crankcase is a housing for the crankshaft and provides
space for its rotation.
 Material
 cast steel
 cast steel & welded steel plates
 Location
A column or frame, mounted on the bedplate, forms
the engine crankcase.
 Connection
 Bedplate to frames - by steel tie rods / long tie bolts
 Cylinder covers to cylinder liners - by strong studs
anchored in the cylinder block (M.A.N.)
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Crankcase
CRANKCASE EXPLOSION
 Causes
Oil droplets are formed by oil splashing from the bearings
mix with air. This mixture does not readily burn or
explode unless there are overheated parts within the
crankcase and presence of fuel oil.
 Prevention
Proper maintenance, correct lubrication, cleanliness.
 Safety arrangements
 Crankcase explosion relief valves;
 Inert gas flooding system;
 Crankcase mist detector
Crankcase
CRANKCASE EXPLOSION
 Consequences
 Minor explosion, flames, pressure shock wave
(ruptures in crankcase doors)
 Major explosion – widespread damage.
 Actions
Stop engine until it cools down.
Bedplate (Base)
DEFINITION
Main strength part providing rigid support for the main
bearings and crankshaft.
STRUCTURE
 longitudinal box structures with stiffening
members and webs
 transverse members or girders
STRESSES
 Heavy stresses in operation;
 While supporting the main bearings and bolts.
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Bedplate (Base)
FUNCTION
 To support the frame and all working parts.
 To collect crankcase lubricating oil and return it to the
sump / draining tank.