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Compressor systems

4 major systems

Air system

Oil system

Regulating system

Electrical system

(see further)

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Air system

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Air system

Air filter

Unloading valve

Compressor element

Check valve

Air receiver

Minimum pressurenozzle

Air outlet valve

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Air filter

Filtration of the inlet air in 2 stages :

centrifugal dust separation

paper filter element

Remark: safety cartridge (optional) is only for protection whenreplacing

the filter element and does not give extra filtering!

Vacuum indicator gives an indication when the pressure dropover the filter element is too high filter element needs to be

replaced

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Air filter

Air inlet Centrifugal separation

Dust

Filter element

to compressor element

Vacuum indicator

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Unloading valve

Opens and closes the air inlet to the compressor element.

Open position at load condition=> Air consumption

Closed position at no load condition=> No air consumption.

Control of the valve by regulating pressure.

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Unloading valve

Valve

Spring loaded

Regulating pressure Air inlet

Integratedblow-down valve

Vent Hole

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Unloading valve

LOAD UNLOAD

Regulatingpressure

Air inlet

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Compressor element

Oil is injected in the air which is compressed to the pressure as set by theregulating valve.

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Compressor element

Oil

Oil

Air/Oil

Air inlet

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Air receiver

Air/Oil

Centrifugal

separation

Separator

element

Air outlet

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Minimum pressure nozzle

Guarantees a minimumpressure in the oil separator(approx. 3 bar)

Minimum pressure is requiredto guarantee a continuous oilsupply to the element.

NOZZLE

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Oil system

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Oil system

Air receiver

Oil cooler

Oil filter

Compressor element

Oil separator

Scavenge line

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Air receiver

Oil flow

Pressure

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Oil cooler

Cool Oil

Warm Oil

Cooling air

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Oil filter

Dirty Oil Filtered Oil

By-pass valve

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Compressor element

Oil

Oil

Air/Oil

Greasing to the bearings

Air inlet

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Oil separator + scavenge line

Air/Oil

Centrifugal

separation

Separator

element

Oil

Scavenge line

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Regulating system

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Regulating system

Regulating valve

Unloading valve

Speed regulator

Blow-down valve

Safety valve

Regulating Valve

Unloading Valve

Speed Regulator

Safety Valve

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Regulating valve

Regulates the effective pressure in the air receiver

Provides regulating pressure to :

unloading valve=> regulates the air inlet according the air requirements

speed regulator=> regulates the engine speed to reduce fuel consumption

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Regulating valve

Spring loaded

Adjusting receiver pressureby changing spring tension

Pressure gauge

to speed regulator

to unloading valve

Regulating pressure

Receiver pressure

to blow-down valve

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Regulating valve

LOAD UNLOAD

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Unloading valve

Opens and closes the air inlet to the compressor element.

Open position at load condition=> Air requirements

Closed position at no load condition=> No air requirements

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Unloading valve

Regulating pressure Air inlet

Vent Hole

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Unloading valve

LOAD UNLOAD

Regulatingpressure

Air inlet

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Speed regulator

Regulates the engine speed in relation to the required air flow

Load condition : maximum engine speed

Unload condition : minimum engine speed

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Speed regulator

Spring loaded

Regulating pressure Vent Hole

Engine speed

- Min

- Max

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Speed regulator

LOAD UNLOAD

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Blow down valve

Blows off the air receiver pressure once the compressor has shut-down=> this to depressurize the receiver tank

Integrated in the unloading valve

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Blow down valve

blo

w-downvalv

e

Receiver pressure

blow-off hole

Air inlet

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Blow down valve

LOAD / UNLOAD BLOW-DOWN

Receiver pressure

Blow-off

receiver pressure

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Safety valve

Blows off the air receiver pressure once thispressure raises above the design pressure.

C i diti

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Compressor running conditions

Major running conditions :

UNLOADReceiver tank pressurized, no air consumption

LOAD

Receiver tank pressurized and air consumption BLOW-DOWN

Machine stopped, blow-off of air pressure

U l d diti

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Unload condition

No air consumption

Pressure in air receiver rises

Regulating valve provides regulating pressure to : Close the unloading valve

Speed regulator to decreases engine rpm

L d diti

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Load condition

Air consumption

Pressure in air receiver drops

Regulating pressure drops

The unloading valve opens and the speed regulatorincreases the engine speed (spring force)

Increased air flow

Bl d diti

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Blow- down condition

Engine stops

Pressure flows back to unloading valve:

check valve closes

blow down valve opens

Vessel depressurizes via the open blow down valve

El t i l t

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Electrical system

Battery voltage : 12 V

Starting system

cuts-out starter motor when engine is running

Safety shut-downs

Compressor :- Compressor element outlet temperature

Engine :- Oil temperature- Oil pressure

Emergency stop

All safety shut-downs are Normal Closed switches- Fail safe as a loose wire will result in a shut-down

Good electrical contacts are important

Instrument indications

El t i l t / td it

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Electrical system / std unit

Operation

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Operation

Starting Up

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Starting Up

Stopping

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Stopping

Maintenance

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Maintenance

Maintenance

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Maintenance

Trouble Shooting

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Trouble Shooting

Trouble Shooting

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Trouble Shooting

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The end