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a generator
Rhoda Torphy
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Why is it necessary to open casing drains and drains on the steam line going to the turbine when a turbine is to be started?
To avoid slugging nozzles and blades inside the turbine with condensate on start-up; this can break these components from impact. The blades were designed to handle steam, not water.
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 warm rolling of steam turbine?
You don't start a large turbine cold. Typically, the lubrication system is started, the turning gear is engaged and warming steam (a small amount of steam, not enough to turn the turbine) is admitted to the turbine to warm and initially expand the shaft and casing. If this isn't done, thermal shock from the admission of high pressure superheated steam into the cold turbine could damage it.
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 the difference between a pulse system and a constant pressure turbocharger?
Types of turbochargers Turbochargers are of two types and they are pulse and constant pressure type turbocharger. Pulse type turbocharger: In pulse type turbocharger, the exhaust gas directly enters the turbine side and drives the turbine with the exhaust gas energy. The connection from the exhaust side of an engine is directly connected to the turbine side of a turbo charger. The pipe connections from the exhaust gas towards the turbine side are generally small in length and exhaust grouping is provided to prevent the blowback of gases from one cylinder to another. Constant pressure type turbocharger: In constant pressure type turbocharger, the exhaust gases gets collected in a single exhaust gas reservoir, where the pressure is maintained constant so as to avoid any fluctuation in the exhaust gas energy pressure. The exhaust gas is introduced to the turbine side after maintaining the pressure inside the cylinder. Materials: Turbine and compressor blades: Steel or nickel alloy. Volute casing: cast iron Bearings: steel or gun metal.
Why is double shell design casing used on modern steam turbine?
In order to reduce material stresses. Under pressure, a casing has to seal against the pressure inside the casing and atmosphere. As plant pressures increase, besides geometrical designs differences, the other basic items left for the designer to minimize stresses are material selection and casing thickness. A double casing provides another option since it essentially places an intermediate casing in between the single casing. In that way, one casing seals against steam pressure and a lower partial pressure, a few stages downstream of the inlet stage, and then the intermediate casing seals against this lower pressure an ambient pressure.
What is casing expansion of steam turbine?
casing and shaft are made of alloy steel they are supposed to expand when heated (at/2 *length of turbine.).wherea is coefficient expansion of material.t=finaltemperature ( of casing or shat)-ambienttemperaturel=length of turbine in meter
What is steam turbine cylinder?
turbing casing
Why is it necessary to open casing drains and drains on the steam line going to the turbine when a turbine is to be started?
To avoid slugging nozzles and blades inside the turbine with condensate on start-up; this can break these components from impact. The blades were designed to handle steam, not water.
Why LP turbine diaphragm breaks?
Lp turbine diaphragm breaks due to positive pressure inside the condenser because of steam expansion.
What is mix pressure turbine?
mix-pressure 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.
Difference between hogger and ejector of condensing turbine?
A Hogger is a device to remove the Air from Turbine inside for creating initial vaccume for start up the turbine means create negative pressure inside Turbine or say creates less pressure than atmospheric pressure in Turbine.An Ejector is a device used in Power plant to remove Undissolved gases from Condenser to avoid any harm to system from these gases.If any correction is required pl. correct it.
What is meant by frame classification of gas turbine?
frame classification means mainly depended the with standing temperature of the gas turbine casing.
What is the wheel chamber pressure in turbine?
Resistance offered by turbine to the steam
What is warm rolling of steam turbine?
You don't start a large turbine cold. Typically, the lubrication system is started, the turning gear is engaged and warming steam (a small amount of steam, not enough to turn the turbine) is admitted to the turbine to warm and initially expand the shaft and casing. If this isn't done, thermal shock from the admission of high pressure superheated steam into the cold turbine could damage it.
Where exactaly located thrust bearing in steam turbine?
Thrust bearings are mounted on turbines at or near the end of the shaft, closest to the steam chest (or inlet). This is to maintain the shaft in position with the casing of the turbine, allowing the casing and the shaft to expand evenly together toward the drive end of the turbine.
