0
What else can I help you with?
Why LP turbine rotor expansion is more than casing?
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.
What is Turbine cold start up?
cold start up of a steam turbine has to be done after a rather long period of shut down - when turbine case and chest temperature are fallen down dramatically. turbine constructor heating ramps mast be followed in order to avoid thermal stresses on the metal of turbine case , valve case and rotor to avoid also height differential expansion between rotor and case that could lead to contact between case and rotor because of the different thermal inertia of the two parts.when the heating is complited the turbine can be started checking closely the differntial expansion recorders.when at speed the unit can be sincronyzed (usually at 3000 rpm) and then loaded according to the related load ramp.(megawatts\ minute)
Why equalizing holes are provided in turbine rotor disc?
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.
What is interlocks in steam turbine?
Interlock system is in turbine for protect the turbine. different types of interlocks in turbine 1. high vibration, 2. Bearing oil Temp,3. vacuum related, 4. over speed, 5. differential expansion, 6. casing expansion, 7. lube oil header Pressure. 8. Axil shift. etc... . this interlocks is keep the turbine in safe mode in any abnormalities.
What is HP and LP turbine expansion?
HP Turbine is High Performance Turbine LP Turbine is Low Performance Turbine
What is expansion turbine?
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.
What is positive differential expansion of steam turbine?
Differential expansion means gap between fixed Blade & rotating blase of a turbine.. When steam enters into the turbine, rotor tends to expand towards generator side & casing tends to expand towards control valve side. If differential expansion increase then there is a possibility of reducing axial gap between rotor & fixed blades. When differential expansion is positive its means rotor expand more than the casing expansion. There is a limit upto +ve 5. If increases than +ve 5 it means we have to check front side tie rods status.
What is negative differential expansion of steam turbine?
Negative differential expansion in a steam turbine refers to a condition where the thermal expansion of the turbine components is not uniform, causing the rotor and casing to expand at different rates. This can lead to increased stresses and potential misalignment, negatively impacting the turbine's efficiency and longevity. Proper design and operational practices are essential to mitigate these effects and ensure optimal performance.
Turbine differential expansion should be positive or negative?
Turbine diff expansion can be positive or negative and depends on the convention used. The usual convention is that positive expansion is rotor expanding faster (hotter) than fixed components. Expansion is dictated by steam flow, gland steam temperatures etc
How do you lower turbine differential expansion?
by controlling main steam flow
Why LP turbine rotor expansion is more than casing?
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.
What is Turbine cold start up?
cold start up of a steam turbine has to be done after a rather long period of shut down - when turbine case and chest temperature are fallen down dramatically. turbine constructor heating ramps mast be followed in order to avoid thermal stresses on the metal of turbine case , valve case and rotor to avoid also height differential expansion between rotor and case that could lead to contact between case and rotor because of the different thermal inertia of the two parts.when the heating is complited the turbine can be started checking closely the differntial expansion recorders.when at speed the unit can be sincronyzed (usually at 3000 rpm) and then loaded according to the related load ramp.(megawatts\ minute)
What is the need for gas turbines?
gas turbine are used for expansion of high pressure gas,which rotates the rotor coupled with generator and hence electricity is finally produced.Gas turbine operate on brayton cycle.
How to control positive differential expansion of IP turbine?
To control positive differential expansion in an industrial steam turbine (IP turbine), it's essential to manage the temperature and pressure conditions effectively. This can be achieved by implementing proper thermal insulation, using controlled heating or cooling systems, and ensuring that the turbine operates within its design parameters. Additionally, regular monitoring of thermal expansion and alignment adjustments can help maintain optimal performance and prevent mechanical stress. Proper maintenance and regular inspections are also crucial to address any potential issues early on.
Why equalizing holes are provided in turbine rotor disc?
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.
What is interlocks in steam turbine?
Interlock system is in turbine for protect the turbine. different types of interlocks in turbine 1. high vibration, 2. Bearing oil Temp,3. vacuum related, 4. over speed, 5. differential expansion, 6. casing expansion, 7. lube oil header Pressure. 8. Axil shift. etc... . this interlocks is keep the turbine in safe mode in any abnormalities.
What is the palindromic name of a revolving part of a turbine?
ROTOR ROTOR
