Operation Manual / Power2 800-M / 4 Product description
1
Introduction
Page 5 / 59
© Copyright 2016 ABB. All rights reserved.
HZTL4061_EN
Revision A
September 2016
Mode of operation of the low-pressure stage (Power2 LP)
Figure 3: Power2 LP diagram
Power2
Two-stage turbocharging
21 HP compressor
Power2 LP Low-pressure stage
22 HP turbine
Power2 HP High-pressure stage
24 LP turbine
A
Exhaust gas inlet from internal
combustion engine
25 LP compressor
26 Intercooler
B
Exhaust gas outlet
C
Air or air/gas mixture inlet
D
Air or air/gas mixture outlet and supply to
the charge air cooler
- - - Not included in the ABB Turbo Sys-
tems scope of delivery
The low-pressure stage (Power2 LP) is a turbomachine and consists of the main components
turbine and compressor. These components are installed on a common shaft and form the
rotor.
In the low-pressure stage (Power2 LP) shown in the illustration (see Figure
), the exhaust
gas coming from the high-pressure stage (Power2 HP) flows through the gas inlet casing (06)
and the nozzle ring (07) and reaches the turbine (08). The LP turbine uses the energy con-
tained in the exhaust gas to drive the rotor. The exhaust gases then reach the atmosphere
through the gas outlet casing (05) and the exhaust gas pipe connected to it.
The rotor runs in two radial plain bearings, which are located between the compressor and the
turbine. The axial bearing is also in the form of a plain bearing. The plain bearings are con-
nected to a central lubricating oil duct which is normally supplied by the lubricating oil circuit of
the engine. The oil outlet lies at the deepest point of the bearing casing (09).
The LP compressor wheel (02) that is connected to the shaft sucks in fresh air or an air/gas
mixture through the filter silencer (01) or the air suction branch. The air is compressed in the
LP compressor and the downstream diffuser (03). The compressed air is passed on to the
intercooler (26) via the compressor casing (10). The air is cooled in the intercooler (26) and
subsequently supplied to the HP compressor (21).
Summary of Contents for Power2 850-M16
Page 28: ......
Page 32: ......
Page 42: ......
Page 44: ......
Page 70: ......
Page 78: ......
Page 80: ......
Page 82: ......
Page 86: ......
Page 88: ......
Page 90: ......
Page 92: ......
Page 94: ......
Page 96: ......
Page 100: ......
Page 130: ......
Page 134: ......
Page 138: ......
Page 140: ......
Page 142: ......
Page 178: ......