Auxiliary engines

Marine Pumps

Reciprocating pump
(double-acting piston pump)
Gearwheel pump
Centrifugal pump

NON-RETURN VALVES

Delivery lines and discharge lines
to and from the pump are

Double-acting displacement pump

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DOUBLE-ACTING DISPLACEMENT PUMP

The double acting
displacement pump
has a simultaneous
suction action
and
discharge action.

valve chest

The volumes of the
pump chambers
are increased and
decreased

discharge valve 1
is closed by
suction;
suction valve 1
is opened by suction.
discharge valve

discharge valve 2
is closed by
suction;
suction valve 2
is opened by
suction.

discharge valve

Gearwheel pump

The liquid enters
the pump-housing
on the suction side.

GEARWHEEL PUMP

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The liquid is carried
around between
the teeth
of the gearwheels.

The liquid is
discharged
through the
discharge line .

GEARWHEEL PUMP

Centrifugal pump

CENTRIFUGAL PUMP

The liquid enters
the pump house
through the
suction intake .

The rotating impeller
causes a
centrifugal force.

CENTRIFUGAL PUMP

The liquid is
discharged
through the
discharge line.

CENTRIFUGAL PUMP

The Anchor Winch

shafts

band brakes

gearwheels

warping drums

cable lifters

dog clutches

THE ANCHOR WINCH

The anchor winch,
or windlass,
is used to drop
and heave in
the

ANCHOR WINCH SHAFTS

Driving shaft
Intermediate shaft
Main shaft.

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DRIVING SHAFT

An electric motor
(or electric-hydraulic
motor)
drives the primary shaft (driving

INTERMEDIATE SHAFT

At the extremities
of the
intermediate shaft
are the warping drums.

Warping drums

THE MAIN SHAFT

The main shaft
is divided into
starboard and port
sections.

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CABLE LIFTERS

The anchor chain
is wound around
the cable lifter.

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BAND BRAKE

Band brakes
control the
dropping speed
of the anchor.

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GEARWHEELS AND
DOG CLUTCHES

Main gearwheels
can be shifted to
port or starboard.

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Dog clutches

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the steering engine

THE STEERING ENGINE

The steering engine
is a
remote controlled
electrically or
hydraulically driven
telemotor.

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The rudderstock
goes through the ruddertrunk.

Ruddertrunk

By turning the
steering wheel on the bridge
the hydraulic pressure is built

Exhaust gas boilers

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The exhaust gas boiler
(or waste heat boiler)
consists of a welded
vertical

Exhaust gases enter the boiler through the exhaust gas inlet;

Exhaust gases

Water turns to steam,
which is used to produce energy for heating

In a composite boiler
the generation of steam can be maintained
by oil

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Generators and Electric motors

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A generator produces either
alternating current (A/C) or
direct current (D/C).

THE GENERATOR

Alternating current changes polarity about 50 times a second. A/C is

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A transformer increases the voltage
(step-up)
or reduces the voltage
(step-down)

THE TRANSFORMER

. The compound motor
is a combination of a
shunt

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The compound motor
combines the
advantages of the
shunt motor and

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The advantage of the
a-synchronous motor
is, that it doesn’t have
carbon brushes and

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THE SYNCHRONOUS MOTOR.

The advantages of
the synchronous motor
are, that it requires