ABB Turbochargers The VTR turbocharger is …ABB Turbochargers VTR – The Classic Product Information VTR – The Classic The VTR turbocharger is designed for 2-stroke low-speed and
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ABB TurbochargersVTR – The Classic
Product Information
VTR – The Classic
The VTR turbocharger is designed for 2-stroke low-speed and 4-stroke medium-speed heavy duty diesel engines (700 to 18,500 kW per turbocharger).
Section through water-cooled VTR turbocharger Section through uncooled VTR turbocharger
Concept of the uncooled
VTR turbocharger
The gas inlet ducts of this design are entirely
uncooled and are not in contact with cooling
water at any point. The greatest possible
amount of heat is therefore made available
for further utilization.
In the interest of functional reliability, the
bearing housing on the turbine end is cooled
with small amount of water and the tempera-
ture of the lubricating oil is thereby kept low.
The simultaneous cooling of the jacket of the
gas outlet casing makes it possible for the tem-
perature of the entire surface of the casing to
be kept within the limits stipulated by the clas-
sification societies for prevention of fire and
protection against accidental contact.
Air intake
The air to be compressed is drawn in through
either
– air suction branches or
– filter silencer.
An integral part of every silencer is a filter
which intercepts coarse dirt particles from the
intake air, and counteracts compressor contam-
ination. The filter can be cleaned during opera-
tion without having to dismantle the silencer.
The compressor noise is reduced in line
with international regulations by means of
felt-covered, shaped plates.
Design features
Power range
Before the turbocharger can be precisely
specified, there will of course be other factors
such as the turbine blades, guide vanes and
compressor wheel variants to be considered.
This is an area where only close collaboration
with trained and experienced turbocharger
specialists of ABB Turbo Systems Ltd will
ensure the optimum supercharging solution.
The table shows the capacity ranges of the various VTRturbochargers, and can be used as an initial selection guideto identify the optimum charger size for a particular engine.
VT
R2
14
P
VT
R2
54
P
VT
R3
04
P
VT
R3
54
P
VT
R4
54
P
VT
R5
64
P
VT
R2
14
VT
R2
54
VT
R3
04
VT
R3
54
VT
R4
54
VT
R5
64
VT
R7
14
VT
R4
54
D
VT
R5
64
D
VT
R7
14
D
1 5 10 20
4.5
4.0
�C [-]
3.5
3.0
at M
CR
com
pre
ssor
pre
ssur
e ra
tio
intake volume flow
V [m3/s]
8
Removal of the rotor shaft
With VTR turbochargers there is no need to
disconnect any air, gas or water pipes in
cases where the rotor shaft, the nozzle rings
or diffusers have to be removed.
The rotor shaft can be withdrawn in four easy
steps. After dismounting the filter-silencer or
the suction branch at the air intake, the bear-
ings are removed. Then the air inlet casing
and the heat insulating partition wall are dis-
connected from the gas casing and the rotor
assembly can then be withdrawn.
Turbine and compressor
VTR turbochargers are fitted with single-stage
axial turbines and radial compressors. The
combination of various turbine blade heights
with a large number of guide vane variants
(nozzle rings), as well as different compressor
wheel widths and a variety of corresponding
diffusers, affords optimum matching of
engines and turbocharger operating
characteristics.
Turbine wheel
Air outlet casing
InducerImpeller
Gas outlet casing
Gas inlet casing
Air filter-silencer
Air inlet casing
Diffuser
Partition wall
Nozzle ring
1110
Main dimensions Major benefits
D/2
E
C DAB A
VTR..4 -11 A B A + B C A + C D E E + D/2 kg*Water Oil l /min