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7/29/2019 CP Compressor
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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