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Auxiliary Engines презентация
Содержание
- 1. Auxiliary Engines
- 2. Marine Pumps Reciprocating pump (double-acting piston
- 3. NON-RETURN VALVES Delivery lines and discharge
- 4. Double-acting displacement pump
- 5. sound DOUBLE-ACTING DISPLACEMENT PUMP The double acting
- 6. The volumes of the pump
- 7. discharge valve 1 is closed
- 8. discharge valve 2 is closed by suction;
- 9. Gearwheel pump
- 10. The liquid enters the pump-housing on the suction side. Gearwheel pump
- 11. s The liquid is carried around between
- 12. The liquid is discharged through the discharge line . Gearwheel pump
- 13. Centrifugal pump
- 14. The liquid enters the pump
- 15. The rotating impeller causes a centrifugal force. Centrifugal pump
- 16. The liquid discharged through the discharge line. Centrifugal pump
- 17. The Anchor Winch shafts band
- 18. THE ANCHOR WINCH The anchor winch (windlass)
- 19. ANCHOR WINCH SHAFTS Driving shaft Intermediate shaft Main shaft. sound
- 20. s DRIVING SHAFT An electric
- 21. INTERMEDIATE SHAFT At the extremities of
- 22. THE MAIN SHAFT The main shaft
- 23. CABLE LIFTERS The anchor chain is wound around the cable lifter. sound
- 24. BAND BRAKE Band brakes control the dropping speed of the anchor. sound
- 25. GEARWHEELS AND DOG CLUTCHES Main gearwheels
- 26. s the steering engine
- 27. The steering engine is a remote
- 28. sound The rudderstock goes through the ruddertrunk. Ruddertrunk the steering engine
- 29. By turning the steering wheel on
- 30. Exhaust gas boilers s
- 31. The exhaust gas boiler (or waste
- 32. Exhaust gases enter the boiler through the
- 33. Water turns to steam, which is
- 34. In a composite boiler the generation of
- 35. s Generators and Electric motors
- 36. sound A generator produces either alternating
- 37. Alternating current changes polarity about 50 times
- 38. sound A transformer increases the voltage (step-up)
- 39. . The compound motor is a
- 40. sound The compound motor combines the
- 41. sound sound The advantage of the a-synchronous
- 42. sound sound THE SYNCHRONOUS MOTOR. The advantages
Слайд 3NON-RETURN VALVES
Delivery lines and
discharge lines
to and from the pump are
non-return valves
to prevent the liquid from flowing back.
sound
Слайд 5sound
DOUBLE-ACTING DISPLACEMENT PUMP
The double acting
displacement pump
has a simultaneous
suction action
and
discharge action.
Слайд 6 The volumes of the
pump chambers
are increased and
decreased
reciprocating motion
of the piston (1).
1
DOUBLE-ACTING DISPLACEMENT PUMP
valve chest
Слайд 7
discharge valve 1
is closed by suction;
suction valve 1
is opened by suction.
discharge
is opened by the pressure of the liquid;
suction valve 2 is closed.
PISTON GOES DOWN:
Слайд 8discharge valve 2
is closed by suction;
suction valve 2
is opened by suction.
discharge
is opened by pressure;
suction valve 1
is closed by pressure.
PISTON GOES UP:
Слайд 18THE ANCHOR WINCH
The anchor winch (windlass)
is used to drop and heave
the anchor through the hawse pipe;
the anchor chain is stored in the chain locker.
s
Слайд 20s
DRIVING SHAFT
An electric motor
(or electric-hydraulic motor)
drives the primary shaft
Слайд 21INTERMEDIATE SHAFT
At the extremities
of the
intermediate shaft
are the warping drums.
Warping drums
they are also used for shifting berth.
sound
Слайд 25GEARWHEELS AND
DOG CLUTCHES
Main gearwheels can be shifted to port or
sound
Dog clutches engage
the cable lifters.
Слайд 27The steering engine is a
remote controlled
electrically or hydraulically driven telemotor.
sound
the
Слайд 29By turning the steering wheel
on the bridge the hydraulic pressure
is built up.
This moves the rams in the cylinders.
sound
the steering engine
Слайд 31The exhaust gas boiler
(or waste heat boiler)
consists of a welded
with a hemispherical top.
sound
Exhaust gas boilers
Слайд 32Exhaust gases enter the boiler through the exhaust gas inlet;
Exhaust gases
banks of tubes, which heat up the water;
The exhaust gases leave the boiler through the exhaust gas outlet.
Exhaust gas boilers
Слайд 33
Water turns to steam,
which is used to produce energy for heating
Firebricks protect the boiler shell against damage.
Firebricks also prevent heat loss.
STEAM
Exhaust gas boilers
Слайд 34In a composite boiler the generation of steam can be maintained
by
when the idle engine does not produce any exhaust gases.
Exhaust gas boilers
Слайд 36sound
A generator produces either alternating current (A/C) or direct current (D/C).
THE
Слайд 37Alternating current changes polarity about 50 times a second.
A/C is
Direct current doesn’t change polarity,
but travels in one direction.
A converter changes
A/C into D/C.
+ -
+ -
Слайд 38sound
A transformer increases the voltage
(step-up)
or reduces the voltage
(step-down)
THE TRANSFORMER
Слайд 39. The compound motor
is a combination of a
shunt
series motor.
. The synchronous motor
has carbon brushes that
require a lot of
maintenance.
. The a- synchronous motor
does not have vulnerable
carbon brushes.
ELECTRIC MOTORS
Слайд 40sound
The compound motor
combines the
advantages of the
shunt motor and
series motor:
it has a
constant speed
and a
high starting torque.
THE COMPOUND ELECTRIC MOTOR
Слайд 41sound
sound
The advantage of the
a-synchronous motor
is, that it doesn’t have
carbon brushes and
THE A-SYNCHRONOUS MOTOR.
The disadvantages of
the a-synchronous motor
are, that it requires much
initial current and
it produces a
low starting-torque.
Слайд 42sound
sound
THE SYNCHRONOUS MOTOR.
The advantages of
the synchronous motor
are, that it requires
little initial current and
it produces a
high starting-torque.
The disadvantages of
the synchronous motor
are the maintenance it
requires, and its price.
