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two stroke and four stroke enginesin the two stroke engines thermodynamic cycle is completed in one revolution of crank shaft whereas in 4 stroke
terminology1 top dead and bottom dead centre these are 2 extreme positions between which the piston reciprocates inside the cylinder
crank pin and crank shaft - part of combustion enginecrank pin crank pin is region on crank shaft on which big end of connecting rod is attached
connected rodit is attached to piston at its small end by means of gudgeon pin the big end bearing is connected to crank pin it is made up of forged
piston and piston rings - part of combustion enginepiston the piston reciprocates within cylinder and transmits force exerted by expanding gases to
cylinder - part of combustion enginecylinderit provides cylindrical closed space to allow movement of piston and to admit charge it is made up of
classification1 in accordance to number of strokes per cyclea two stroke b four
internal combustion models of enginethe engines which develop power by combustion of fuel within the engine are called internal combustion engines
reaction turbine the turbine in which the steam expands while passing over the moving blades as well as while passing over the fixed blades and the
working of impulse turbinethe technique in which multiple system of rotors are keyed to a common shaft in series and the steam pressure of jet
impulse turbinethe steam turbine in which the steam expands while passing through nozzle and remains at the constant pressure over the blades is
construction of steam turbine construction details1 casing it is made out of cast steel the casing has rotor inside it2 rotor it carries blades
classification the steam turbines can be classified as follows1 in accordance to method of steam expansiona impulse b
steam turbineintroduction steam turbine is chief mover in which rotary motion can be obtained by a gradual change of momentum of steam the force
steam engine terminology1 cylinder bore inside diameter of cylinder2 cover end and crank end of cylinder in the
steam engine main parts connecting rod it connects cross head with crank on other side crank shaft it is output shaft on which the
terms related to stream enginesteam engine main parts1 frame it supports the various moving parts2 cylinder it forms
classification1 in accordance to cylinder axis engine can be vertical or horizontal2 in accordance to action of steam can be single acting or
steam enginessteam engine is heat engine which converts heat energy to mechanical energy the pressure energy of steam acts on piston and piston is
locomotive boiler it is horizontal natural circulation fire tube boiler it can generate steam at the rate of 7000 kghr at pressure of up to 25 mpa
construction of lacashire boilerconstruction consists of boiler shell which contains water and steam diameter can vary from 175 to 275 m and length
lacashire boiler it is fire tube internally fired stationary horizontal natural circulating type boiler evaporative capacity can be up to 8500 kghr
construction featurescomprises of a water drum which is connected to two headers at the front and back ends the headers are connected by large number
internal parts of boilerpressure gauge for indicating steam pressurewater level indicator for indicating water levelsteam stop valve permits
important termsfire box place where fuel is burntgrate the fuel is burnt on thisbaffles plates are used for directing the flow of flue gasseschimney