What is the function of a balance piston in a steam turbine?

The purpose of the balance piston is to cancel out the axial force towards the condenser and to take the load off the axial bearing, which is always required. the pressure difference on the rotor blades.

What is turbine balancing?

Balancing is defined as the process by means of which the mass distribution about the spin axis is checked and is corrected, if necessary, so that the bearing forces and the vibrations of the shaft corresponding to running frequency are within specified limits.

What is the main purpose of a steam turbine?

A steam turbine is a machine that extracts thermal energy from pressurized steam and uses it to do mechanical work on a rotating output shaft. Its modern manifestation was invented by Charles Parsons in 1884.

What is thrust balance?

Some of the forces push the rotor towards the turbine end. Some of the forces push the rotor towards the pump end. Getting the right balance of forces is called your thrust balance.

What is thrust in steam turbine?

The purpose of the turbine thrust bearing is to provide a positive axial location for the turbine rotors relative to the cylinders. As thrust pressure is applied, the wedge narrows and oil is forced to the restricted end. This ensures that metal-to-metal contact between the pads and the thrust collar is prevented.

How do you balance a steam turbine rotor?

Rotors are normally balanced at low speed (400 r/min) and weight adjustment made in two convenient planes, one at each end of the rotor. This adjustment may be by varying screwed plugs in tapped holes, or by adding balance weights at specific circumferential positions.

What is a high speed balancing?

High Speed Balancing is the last step to ensure the repair cycle has been successfully completed and that your machine is ready for optimum performance. After the High Speed Balancing (HSB) is complete, you can be confident that your machine will operate safely and support your business goals.

What is Casing in steam turbine?

Steam turbines consist essentially of a casing to which stationary blades are fixed on the inside and a rotor carrying moving blades on the periphery. The rotor is fitted inside the casing with the rows of moving blades penetrating between the rows of fixed blades.

What is the purpose of balancing line in boiler feed pump?

Balance line is used to balance the centrifugal pump shaft from axial thrust. Due to the axial thrust, pump bearings and internals will get damaged.

What is the purpose of a balancing line in a turbine?

The purpose of giving the Balancing piston or Balancing line to encounter the axial thrust. Because of differential pressure at the inlet and outlet , turbine experiences the axial thrust. Balance piston is exposed to high pressure on one side and discharge pressure/low pressure on other side.

How does the balance piston of a steam turbine work?

Balance piston is exposed to high pressure on one side and discharge pressure/low pressure on other side. The steam enter in between the balance piston and first stage of turbine and give a reaction force to the balancing piston opposite to the axial thrust hence it counter balance the turbine shaft.

What is steam balancing?

WHAT IS STEAM BALANCING? The steam balance is the most efficient method of gaining knowledge of all aspects of the steam system, such as steam generation, distribution, end users, and condensate recovery systems. The steam balance is always the first step in any steam system management program.

What is steam turbine?

Steam turbine utilises Steam at high temperature to convert Thermal Energy to kinetic Energy for say Power generation or as a prime mover for other machines. The steam has an effect of expanding all parts of any machine by altering all dimensions. The rotor is also subject to axial thrust due to the flow of steam while in operation.