Turbomachinery for Nitric Acid Plants - MAN Diesel & Turbo

Steam turbine
The MAN Turbo modular system
For the important subassemblies of
MAN Turbo steam turbines, such as
bearing housings, control-valve/nozzle
casing, control-stage casing and exhaust
casing, as well as for the connecting
elements, a modular system of
geometrically graded component sizes
has been developed. Combining the
various modules permits flexible adaptation
of the machine to multifarious appli-
cations through the selection of optimum
design features. In order to keep
the blading free from vibration resonance
throughout the speed range, a thick
dropshaped profile with an integral
shroud segment was developed for the
rotor blades in the reaction part of the
turbine. This is a very rugged profile;
which can be used within a wide stagger
angle and blade spacing range and is
available with different chord lengths.
The blade selection procedures ensure
resonance free operations. The tapered
twisted rotor blades of the exhaust
stages and the corresponding tapered
stator blades are again selected from a
standard blade range. The rotors are
forged from the solid and are balanced
fully bladed under vacuum conditions at
operating speed.
15