Back pressure turbines
TGM Kanis supplies back pressure steam turbines in both action and reaction design (BT series). The turbines can also be designed with one or more controlled extraction and/or with several steam bleeds.
TGM Kanis offers condensing steam turbines both in action and reaction design (CT series). The turbines can also be designed with one or more controlled extraction and/or several steam bleeds.
Modular design system
For the rationalization of manufacturing processes,
TGM Kanis developed a modular design system containing a variety of equal standardized components - the so-called Modules. These modules optimize the spare parts storage,
the delivery time, the reliability and the quality. The following modules offer an economical
customized design for the industrial application:
Emergency stop valve
Control valve casing
Modularized casing sections, pedestals, labyrinths
Standardized blade profiles
Guide blade carrier
Steam inlet section
Steam passes through the flanged emergency stop valve [Fig. 1] and enters the tube-shaped valve casing. Up to four individually operated double seated valves are fitted side by side in this casing, controlling the live steam flow safely and precisely [Fig. 2]. The valve casing is welded or casted to the HP casing. The casted nozzle chest contains the individually designed nozzle segments and is also located inside the HP casing.
Hydraulically operated emergency valve with low pressure servo motor
Hydraulically operated double seated control valve with low pressure servo motor
The turbine casing has a symmetrical design, which reduces thermal stress to a minimum. It is divided horizontally and held together by pre-tensioned flange bolts [Fig. above]. The flange areas of the lower or upper casing are sealed steam tight without the use of additional sealants.
For an extraction turbine the modularized casing will be completed with an extraction module. The extraction flanges can be designed up-wards or down-wards.
The casing is made out of alloyed casted steel in order to withstand the high steam pressures and temperatures.
The casing is equipped with sufficient openings for boroscope inspections. Compact dimensions allow short start-up times.
Exhaust steam casing guide blade carrier
The exhaust steam casing is selected from the modular system and casted or welded depending on size and turbine type. The two halves of the housing are connected with pretensioned expansion bolts on the horizontal flange.
The vertical cross-split flange is located in the exhaust area, i.e. behind the suspension of the last guide vane support. The design allows favourable start-up and load times.
The turbine rotor is designed as a forged full rotor. The rotor is subjected to strict tests (test bars, ultrasound, crack detection). The bending and torsion critical calculation [graphic right] is carried out using modern calculation programs. The optimal channel shape and the choice of the most favourable blade grid are calculated by calibrated computer programs depending on the respective task.