Essential reading:Essential reading:SPINČIĆ, A., PRITCHARD, B,SPINČIĆ, A., PRITCHARD, B, An English Textbook For An English Textbook For

Marine Engineers 2Marine Engineers 2., Pomorski fakultet, Rijeka 2009.., Pomorski fakultet, Rijeka 2009.

LUZER, J., SPINČIĆ, A., LUZER, J., SPINČIĆ, A., Gramatička vježbenica engleskog Gramatička vježbenica engleskog jezika za pomorcejezika za pomorce, Pomorski fakultet, Rijeka 2003., Pomorski fakultet, Rijeka 2003.

Tomislav Skračić, MATomislav Skračić, MA

Undergraduate English Undergraduate English Course forCourse for

MARIMARINE ENGINEERSNE ENGINEERS3rd Semester3rd Semester

Marine diesel engine – cross section

Lesson 1Lesson 1Cylinder and CrankcaseCylinder and Crankcase

KEY WORDS

crankcase (n.) - kućište koljenaste osovinebore (n.) - provrt, promjer cilindraliner (n.) - košuljica cilindracooling water jacket - vodeni plaštcast iron - lijevano željezocasing (n.) - kućišteoverhaul (n.) - remont, temeljiti popravak,

tehnički pregled, 'klasa'cylinder casting - kućište / blok cilindrafairly - popriličnowithstand (v.) - izdržati, podnijetistress (n.) - naprezanje, opterećenjeresistance (n.) - otporheat flow - strujanje topline, odvod topline

Lesson 1Lesson 1Cylinder and CrankcaseCylinder and Crankcase

KEY WORDS

cylinder head - glava cilindracylinder cover - poklopac cilindrastud (n.) - usadni vijak, 'pržunjer'nut (n.) - maticagas-tight seal - plinonepropusna brtvatensile load - vlačno opterećenjeentablature (n.) = under piston space - gornji dio stalka motoraarticulated - sastavljen od dijelova, zglobno spojenjack bolt - vijak glave motoratie bolt - kotveni vijakthrust bolt, tie bolt - vijak temeljnog ležaja preopterećen na tlaktie rod - kotvena šipka koja uzdužno

spaja sve komponente

Lesson 1Lesson 1Cylinder and CrankcaseCylinder and Crankcase

KEY WORDS

bearing (n.) - ležajbedplate (n.) - temeljna pločacolumn (n.) - stalakcolumn (n.) = guide shoes for the cross-head

- klizna staza križne glaveframe (n.) - okvir, postoljegas pressure - tlak plinovasteel member - čelični diocompression (n.) - kompresija, pritisakcrankshaft (n.) - koljenasta osovina, radilicamulti-throw shaft - višecilindarska koljenasta osovinalow grade fuel - gorivo loše kvalitete

Lesson 1Lesson 1Cylinder and CrankcaseCylinder 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 CrankcaseCylinder 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 - DEFINITIONCrankcase - DEFINITION

The crankcase is a housing for the crankshaft and provides space for its rotation.

Material cast steel cast steel & welded steel plates

LocationA 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.)

11

CrankcaseCrankcase

CRANKCASE EXPLOSION

CausesOil 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.

PreventionProper maintenance, correct lubrication, cleanliness.

Safety arrangements Crankcase explosion relief valves; Inert gas flooding system; Crankcase mist detector

CrankcaseCrankcase

CRANKCASE EXPLOSION

Consequences Minor explosion, flames, pressure shock wave

(ruptures in crankcase doors) Major explosion – widespread damage.

ActionsStop engine until it cools down.

Bedplate (Base)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.

18

Bedplate (Base)Bedplate (Base)

FUNCTION

To support the frame and all working parts. To collect crankcase lubricating oil and return it to the

sump / draining tank.