What is gland sealing steam?
The gland sealing steam system provides low-pressure steam to the turbine gland in the final sets of labyrinth packing. This assists the labyrinth packing in sealing the turbine to prevent the entrance of air from reducing or destroying the vacuum in the associated condenser.
What is the purpose of gland seal?
This gland seal water serves three important functions: it enables the pump shaft to rotate within its sleeve with minimum friction, it prevents the slurry from back-flowing into the seals and damaging the shaft, and. it allows for a small amount of cooling of the pump shaft, which heats up as it rotates at high speeds …
How does gland seal work?
The packing is inside the gland nut and creates the seal. The shaft is wrapped by the packing and put in the gland nut. Through tightening it onto the stern tube, the packing is compressed, creating a seal against the shaft. Creating a proper plunger alignment is critical for correct flow and a long wear life.
Why do you need a gland steam extractor?
The gland steam exhausters produce a slight vacuum in the gland steam condenser to remove air and noncondensable gases that carry over into the gland steam condenser with the leak-off steam from the shaft glands.
How does a gland steam condenser work?
Gland Steam Condenser captures the leaked steam and air mixture. Once collected, the steam is separated from the air and condensed water in a shell and tube condenser. The condensate drains out of the bottom while the air is pulled out of the top.
How does sealing steam work?
What is self sealing in turbine?
A high pressure steam turbine having a sealing gland where the turbine rotor penetrates the casing of the turbine. Under certain conditions the gland is sealed by an auxiliary steam supply, and under other conditions the gland is self sealed by turbine inlet steam.
What does Valve gland mean?
Gland or gland bushing The part of the valve which retains or compresses the stem packing in a stuffing box.
How does the steam turbine gland sealing system work?
The leakage of steam or air could occur where the shaft is extended through the turbine endwalls to atmosphere. A power loss is associated with steam leakage or air ingress. Thus, the design of glands and seals is optimized to reduce any leakage. Modern steam turbines use labyrinth glands to restrict steam and air leakage.
Why is it important to use gland sealing system?
So, gland sealing system is used to prevent leakage.Low pressure steam is supplied to final seats of labyrinths. Arrangement is done vent the excess steam. To drain out the condensate producing due to cooling of the gland steam drain are also provided. DIFFERENT TYPE OF STEAM SEALING IN TURBINE
What does a gland steam ejector do on a steam turbine?
They are designed to remove air & steam from the turbine gland seal area to prevent air from flowing into the condenser on condensing steam turbines. Gland Steam ejectors designed to meet the turbine manufacturers specified requirements for dry air leakage and water vapor at the specified vacuum level.
How are labyrinth seals used to prevent steam leak?
Sets of labyrinth seals are provided . as discussed earlier . these labyrinth seals causes pressure drop along the rotor . but only labyrinth packing is not sufficient to prevent steam leakage of steam or air. So, gland sealing system is used to prevent leakage .Low pressure steam is supplied to final seats of labyrinths.