Equalizing holes are provided in turbine rotor discs to ensure uniform pressure distribution across the rotor during operation. These holes help to alleviate any potential imbalance caused by thermal expansion or pressure differentials, which could lead to mechanical stress or failure. By equalizing the pressure, the holes enhance the structural integrity and operational reliability of the rotor, contributing to improved performance and longevity of the turbine.
my LP turbine differential expansion increase ,when rated gland steam temperature maintain.
In a low-pressure (LP) turbine, the rotor expansion is greater than the casing due to the design and operational conditions of the turbine. The rotor experiences a significant drop in pressure and temperature as steam expands through the turbine stages, resulting in a larger volumetric increase compared to the casing, which is designed to contain the steam flow with minimal expansion. This difference allows for efficient energy extraction from the steam, optimizing the turbine's performance while maintaining structural integrity in the casing. Overall, the rotor's greater expansion accommodates the dynamic changes in steam properties as it moves through the turbine system.
it is used balance axial thrust on turbine rotor due to admitting of high pressure steam in to turbine. it basic purpose is to save thrust bearing.
When a large turbine rotor stops it will still be hot and will tend to bend in the middle if left to cool normally. To prevent this the barring gear will turn the rotor slightly at given intervals during the cool down period.
one rotor blade and one stator blade make up a stage of the turbine. after crossing every stage the pressure of the steam reduces.
ROTOR ROTOR
axial shift of a steam turbine is the shifting of turbine rotor in the forward and backward direction due to steam thrust on blades of rotor.
The length of a rotor blade on a wind turbine can vary depending on the turbine size and design. On average, rotor blades can range from 116 to 328 feet (35 to 100 meters) in length for utility-scale turbines.
It depends upon megawatt of turbine & design of blades.
differential expansion is refer to differential distance between rotor blade and fix blade.rotor expand toward generator and casing expand toward control valve.when temperature increase ,expansion in casing and rotor.so rotor mass is less than casing which rotor expand more than casing.
A two stage impulse contains 2 stages. One stage is a stator and rotor, therefore a 2 stage impulse turbine contains a stator-rotor-stator-rotor.
Tangential velocity of a turbine refers to the linear speed of a point on the edge of the turbine’s rotor as it moves in a circular path. It is calculated using the formula ( V_t = r \cdot \omega ), where ( V_t ) is the tangential velocity, ( r ) is the radius of the rotor, and ( \omega ) is the angular velocity in radians per second. This velocity is crucial for determining the efficiency and performance of the turbine, as it impacts the energy conversion process. Higher tangential velocities often lead to greater energy output, provided the turbine is designed to handle such speeds.
Dummy piston is provided to oppose the axial thrust generated (in the direction of steam) due to incoming steam.
putting a journal bearing at each end of the turbine rotor or shaft would be to support it.
my LP turbine differential expansion increase ,when rated gland steam temperature maintain.
FanDragon flyHelicopter
There's a boiler which produce steam. Steam drives/turns the turbine. The turbine is connected to the alternator rotor via a shaft. Turning the rotor then generate electricity.