Importance of Draining Inside Turbine Casing

Material for turbine casing. Thus steam flowing through the turbine passes alternately through fixed and moving.

Steam Turbine Flow Operation Processing Magazine

Turbine casing is determined because this parameter has a strong influence on casing integrity and residual life.

. Machine hence optimized design is required. 1 LP Turbine The casing of the double-flow LP cylinder is of three-shell design. A cover or shell that protects or encloses something.

This is the point of the open arrows inside the motor envelope. The other open arrow points to the external case drain port and the implication is that it connects the case drain port to the. The provision of an inner casing confines high steam inlet conditions to the admission section of this casing while the joint flange of the outer casing is subjecting only to the lower pressure and temperature effective at the exhaust from the inner casing.

The one downward pointing open arrow carries leakage from the motors work ports and releases it into the internal cavity of the motor case. Starting a small non condensing turbine like that. Turbine drain valve drains the casing to atmosphere.

The three dimensional model of the Steam Turbine Casing was created using the. Answer 1 of 2. 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 boiler will operate at subcritical pressure 245 bar and temperature 540CWhat are the shortcomings of using Cast Iron in. KeywordsRemaining life assessment creep-fatigue interaction high pressure steam turbine. In this work the temperature and stress distributions for turbine inner casing were calculated by finite element analysis.

To avoid slugging nozzles and blades inside the turbine with condensate on start-up. Steam Turbine Casing A turbine casing cylinder is a high pressure vessel with its weight supported at each end on the horizontal centre line. The rotor is fitted inside the casing with the rows of moving blades penetrating between the rows of fixed blades.

The upper case absorbs energy from the steam flow and loses it mainly via convection and radiation to the surrounding air. Fill all grease cups and oil the governor and other miscellaneous parts. A requirement when the pumped fluid is of an explosive corrosive or poisonous nature.

Casing may also refer to an enclosing shell tube or surrounding material. Directly to the turbine casing or else they are located inside of a nozzle diaphragm. The lower case gains energy from the same steam but isnt su.

Equipped with traps open the bypass line. Casing PKDhakan Abdul Basheer PC Hydel Research and Development Centre Jyoti Limited Vadodara India. Turbine drains are necessary to avoid slugging nozzles and blades inside the turbine with condensate on start-up.

This drainage prevents gum deposits in the fuel manifold nozzles and combustion chambers. What does Casing mean. Another very important requirement in the construction of combustion chambers is providing the means for draining unburned fuel.

This can break these components from impact. Think about the difference between the upper and lower cases in terms of thermodynamic losses. Open drains on the steam line separator casing and exhaust lines.

Steam turbine casing will be established by finite element method. As turbine is a rotary mechanical device that extracts energy from a flowing fluid and converts it. Safety utmost importance while operating the main engine.

I want your expert opinion regarding the application of Nodular Cast Iron GGG40 for LP turbine inner casing and IP turbine outer casing in a power plant. Modern steam turbines have an electronic governor that uses sensors to monitor the speed by examining the rotor teeth. It has to drain off the water coming out of the buckets without hindering the runner.

The effluent must be discarded in a manner that will. 16 Apr 13 0711. Articleosti_5351916 title Rotor assembly for a gas turbine engine and method of disassembly author Hetzer F C and Miller G W abstractNote This patent describes an axial flow gas turbine engine of the type which includes a compression section a turbine section a flow path for working medium gases which extends axially through the sections and a stator.

The casing is an essential part of the turbine. The LP turbine is a pressure compounded either single or dual axial flow condensing reaction turbine. Turbine casing drains remove the condensate from the turbine casing during warm-up securing maneuvering and other low flow conditions.

The results of residual life assessment provide not only a basis for further maintenance but also estimated time for reparation or renewal. There are usually different types of casing like 1. Slowly open the exhaust-line shutoff valve.

This can break these components from impact. Answer 1 of 2. The top halves of the diaphragms are fixed in the casing by the same arrangement and lift with the casing cover.

Turbine casing drains remove the condensate from the turbine casing during. The pump casing drain is shown having two valves. In the event the casing pressure exceeds a predetermined setting above the normal operating pressure the valve.

- Describes the importance of draining inside turbine casing - Describes with the aids of a sketchcomputer aided drawing function of gland packing steam - Explains the function of manoeuvring valve Explains the role of extraction steam Describes that gland steam pressure is controlled by make up valve and spill valve. The important components steam turbine casing is shells shaft-end packing head flange bolts inlet section and a diffuser 5 6. To design a more efficient steam turbine a casing with proper nozzles and vanes to confine the steam and valves to control the admission of steam to the nozzles should be used.

When all draining is complete a foamed water solution like that used for the system integrity test is injected through the turbine to force out any remaining chemical solvent not previously drained. Is of the The turbine casing houses and supports the turbine rotor labyrinth seals and bearings. In this situation the pump casing is drained into a closed drain.

The blades were designed to handle steam not water. This is warning device located on the top of the exhaust end turbine casing indicates excessive turbine exhaust end casing pressure. Low pressure LP turbine.

The LP turbine see Figure 6 is located next to the HP turbine. Turbine casing drains remove the condensate from the turbine casing during warm-up securing maneuvering and other low flow conditions.

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