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Turbine negative expansion and positive expansion?
Negative expansion in a turbine occurs when the turbine suffers from a loss of power output due to factors like fouling or damage. Positive expansion, on the other hand, would refer to the ideal scenario where a turbine operates efficiently and produces the expected power output.
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.
What to do about turbine rotor differential expansion?
my LP turbine differential expansion increase ,when rated gland steam temperature maintain.
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.
How do you lower turbine differential expansion?
by controlling main steam flow
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 LP turbine diaphragm breaks?
Lp turbine diaphragm breaks due to positive pressure inside the condenser because of steam expansion.
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 absolute expansion of steam turbine?
it's the thermal expansion in the casing of hp or ip turbine can be noticed by journal or thrust bearing when moving <<
What is Steam turbine T S I system?
The TSI system is Turbine Supervisory Instrumentation system, consists of multiple instruments, including speed sensors, speed monitors and so on. The system continuously monitors the steam turbines of all important parameters, such as: rotational speed, overspeed protection, eccentricity, shaft vibration, cover vibration, axial displacement, differential expansion, and thermal expansion. The system helps to improve the availability of steam turbine unit.
