What are the main parts of a steam turbine?

The main parts of a steam turbine are (1) the rotor that carries the blading to convert the thermal energy of the steam into the rotary motion of the shaft, (2) the casing, inside of which the rotor turns, that serves as a pressure vessel for containing the steam (it also accommodates fixed nozzle passages or stator …

Why are nozzles used in steam turbines?

A steam nozzle is a duct or passage of smoothly varying cross sectional area which converts heat energy of steam into kinetic energy. The shape of the nozzle is designed such that it will perform this conversion of energy with minimum loss.

What is the most common bearing used in steam turbine?

2 Thrust and combined bearings. The thrust bearings used in steam turbines are generally of the tilting-pad type. The possibility of the angle of tilt to vary with load improves the load capacity of the bearing. Generally, two thrust bearings are installed in a front-to-front (Fig.

What material is used in steam turbine blades?

Blades under high and medium pressure are usually made of stainless steel from 12Cr, but are made of stainless steel at temperatures above 450 degrees, because stainless steel has better properties at high temperatures.

What is the use of draft tube?

The draft tube is a conduit which connects the runner exit to the tail race where the water is being finally discharged from the turbine. The primary function of the draft tube is to reduce the velocity of the discharged water to minimize the loss of kinetic energy at the outlet.

What are the two main types of steam turbines?

Two types of steam turbines must be considered, condensing and noncondensing.

Which types of bearing used in steam turbine?

Steam turbines have journal bearings and thrust bearings. Journal bearings are at each end of each rotor to support the weight of the rotor. One thrust bearing typically is provided for the entire steam turbine to maintain the axial position of the rotor.

Which bearing is used in turbines?

Spherical roller bearings are often used in the main shaft of the turbine. It is also common to find a tapered roller bearings (TRB) used in combination with a cylindrical roller bearing (CRB) at this location, said Stephen Curtis, director of Renewable Energy Business.