How to design a steam turbine rotor?

The steam turbine rotors must be designed with the most care as it is mostly the highly stressed component in the turbine. The design of a turbine rotor depends on the operating principle of the turbine. The Impulse Turbine, in which the pressure drops across the stationary blades.

What are the components of a stator assembly?

The stator assembly includes the turbine casing, nozzles, diaphragms, and stationary blades. The design of the turbine casing depends on whether it is a high pressure (HP) or low pressure (LP) casing.

Where does a steam turbine shaft end go?

In a steam turbine we’re talking about where the shaft ends exit the casing, through the space between the diaphragm ID and the shaft and across the rotor blade tips and sometimes the base of the rotor blades (see figure 3). environment. This is the case with all but the exhaust end of a condensing turbine.

How do steam turbine rotors work?

Precision manufacturing processes, such as disc forging, are used to create robust rotor assemblies. These assemblies can handle the demanding operating conditions. To maintain proper alignment and absorb axial and radial forces, steam turbines rely on a support system. This system includes bearingsand lubrication.

What is the axial position of a steam turbine rotor?

As a normal practice, the axial position of rotor exceeds 0.3 mm alarm and shutdown at 0.6 mm. (Readers please note these valves are thumb rule, it may change with respect to manufacturer and turbine model) Seals are used to reduce the leakage of steam between the rotary and stationary parts of the steam turbine.

How do steam turbine bearings work?

Thrust bearingsmaintain the rotor position and absorb axial thrust due to steam pressure. Radial bearings, ranging from anti-friction bearings to tilting pad bearings, provide stability and support for the rotating assembly. Key Takeaways Steam turbines convert thermal energyfrom pressurized steam into mechanical energyfor power generation.