How the turbine glands are sealed?
The turbine glands are sealed with labyrinth packing when the exhaust steam is led to the vacuum condenser. To prevent air from entering into the turbine casing, sealing steam is led to the turbine glands.
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 sealing steam work?
gland steam providing a seal between turbine shaft and turbine casing . so gland steam protect the leakage of steam outside of the turbine and also and suck the ambient air inside . In a turbine, rotor rotates inside the casing. these labyrinth seals causes pressure drop along the rotor .
What are turbine seals?
The turbine gland sealing system (TGSS) prevents the escape of steam from the turbine shaft and casing penetrations and the glands of main steam stop and control valves. This system also prevents air leakage into the low pressure turbine glands.
What is the purpose of seal steam on a turbine?
The seal steam system enables the turbine to be sealed where the shaft exits the casing—in effect keeping “air out and steam in.” Sets of labyrinth packing are used along the turbine rotor where the rotor exits the turbine casing to maintain this pressure differential between the inside and outside.
Why do mechanical seals leak?
A pump seal normally needs fluids to lubricate the materials around shaft. The seal will burn or melt and become damaged, which causes fluid leakage due to the pressure. Even a few seconds of dry running can cause heat cracks or blisters, which leads to a leaking pump shaft seal.
What are four types of turbine seals?
Labyrinth mated with shaft serration’s or shaft seal strips. Water seals where a shaft runner acts as a pump to create a ring of water around the shaft. Use only treated water to avoid shaft pitting. Stuffing box using woven or soft packing rings that are compressed with a gland to prevent leakage along the shaft.
What is labyrinth in steam turbine?
The function of all labyrinth seals inside the steam turbine, at each turbine stage, is to reduce steam leakage between stator and rotor parts and returning leaked steam in main steam flow (main steam flow passes through channels between all stator and rotor blades at each turbine stage).
What does the shaft in a wind turbine do?
When the wind forces the blades to move, it has transferred some of its energy to the rotor. Shaft – The wind-turbine shaft is connected to the center of the rotor. When the rotor spins, the shaft spins as well. In this way, the rotor transfers its mechanical, rotational energy to the shaft, which enters an electrical generator on the other end.
What is a PSS shaft seal?
The PSS shaft seal is a replacement system for stuffing boxes. The PSS has no packing to adjust or replace and does not leak water into the bilge. Additionally, due to the simple design, the PSS requires no maintenance and will provide years of trouble-free service.
What is the output shaft seal?
As its name implies, the front output shaft seal is responsible for sealing the front output shaft of the transfer case, keeping the gear oil or transmission fluid inside of the unit. The seal is usually round in shape, and made of rubber and sometimes metal, not unlike many other automotive engine and transmission seals.
What is a mechanical shaft seal?
A mechanical seal is simply a method of containing fluid within a vessel (typically pumps, mixers, etc.) where a rotating shaft passes through a stationary housing or occasionally, where the housing rotates around the shaft.